0
|
1 |
/****************************************************************************
|
|
2 |
**
|
|
3 |
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
4 |
** All rights reserved.
|
|
5 |
** Contact: Nokia Corporation (qt-info@nokia.com)
|
|
6 |
**
|
|
7 |
** This file is part of the QtCore module of the Qt Toolkit.
|
|
8 |
**
|
|
9 |
** $QT_BEGIN_LICENSE:LGPL$
|
|
10 |
** No Commercial Usage
|
|
11 |
** This file contains pre-release code and may not be distributed.
|
|
12 |
** You may use this file in accordance with the terms and conditions
|
|
13 |
** contained in the Technology Preview License Agreement accompanying
|
|
14 |
** this package.
|
|
15 |
**
|
|
16 |
** GNU Lesser General Public License Usage
|
|
17 |
** Alternatively, this file may be used under the terms of the GNU Lesser
|
|
18 |
** General Public License version 2.1 as published by the Free Software
|
|
19 |
** Foundation and appearing in the file LICENSE.LGPL included in the
|
|
20 |
** packaging of this file. Please review the following information to
|
|
21 |
** ensure the GNU Lesser General Public License version 2.1 requirements
|
|
22 |
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
|
|
23 |
**
|
|
24 |
** In addition, as a special exception, Nokia gives you certain additional
|
|
25 |
** rights. These rights are described in the Nokia Qt LGPL Exception
|
|
26 |
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
|
|
27 |
**
|
|
28 |
** If you have questions regarding the use of this file, please contact
|
|
29 |
** Nokia at qt-info@nokia.com.
|
|
30 |
**
|
|
31 |
**
|
|
32 |
**
|
|
33 |
**
|
|
34 |
**
|
|
35 |
**
|
|
36 |
**
|
|
37 |
**
|
|
38 |
** $QT_END_LICENSE$
|
|
39 |
**
|
|
40 |
****************************************************************************/
|
|
41 |
|
|
42 |
#include "qrect.h"
|
|
43 |
#include "qdatastream.h"
|
|
44 |
#include "qdebug.h"
|
|
45 |
#include "qmath.h"
|
|
46 |
|
|
47 |
#include <math.h>
|
|
48 |
|
|
49 |
QT_BEGIN_NAMESPACE
|
|
50 |
|
|
51 |
/*!
|
|
52 |
\class QRect
|
|
53 |
\ingroup painting
|
|
54 |
|
|
55 |
\brief The QRect class defines a rectangle in the plane using
|
|
56 |
integer precision.
|
|
57 |
|
|
58 |
A rectangle is normally expressed as an upper-left corner and a
|
|
59 |
size. The size (width and height) of a QRect is always equivalent
|
|
60 |
to the mathematical rectangle that forms the basis for its
|
|
61 |
rendering.
|
|
62 |
|
|
63 |
A QRect can be constructed with a set of left, top, width and
|
|
64 |
height integers, or from a QPoint and a QSize. The following code
|
|
65 |
creates two identical rectangles.
|
|
66 |
|
|
67 |
\snippet doc/src/snippets/code/src_corelib_tools_qrect.cpp 0
|
|
68 |
|
|
69 |
There is a third constructor that creates a QRect using the
|
|
70 |
top-left and bottom-right coordinates, but we recommend that you
|
|
71 |
avoid using it. The rationale is that for historical reasons the
|
|
72 |
values returned by the bottom() and right() functions deviate from
|
|
73 |
the true bottom-right corner of the rectangle.
|
|
74 |
|
|
75 |
The QRect class provides a collection of functions that return the
|
|
76 |
various rectangle coordinates, and enable manipulation of
|
|
77 |
these. QRect also provide functions to move the rectangle relative
|
|
78 |
to the various coordinates. In addition there is a moveTo()
|
|
79 |
function that moves the rectangle, leaving its top left corner at
|
|
80 |
the given coordinates. Alternatively, the translate() function
|
|
81 |
moves the rectangle the given offset relative to the current
|
|
82 |
position, and the translated() function returns a translated copy
|
|
83 |
of this rectangle.
|
|
84 |
|
|
85 |
The size() function returns the rectange's dimensions as a
|
|
86 |
QSize. The dimensions can also be retrieved separately using the
|
|
87 |
width() and height() functions. To manipulate the dimensions use
|
|
88 |
the setSize(), setWidth() or setHeight() functions. Alternatively,
|
|
89 |
the size can be changed by applying either of the functions
|
|
90 |
setting the rectangle coordinates, for example, setBottom() or
|
|
91 |
setRight().
|
|
92 |
|
|
93 |
The contains() function tells whether a given point is inside the
|
|
94 |
rectangle or not, and the intersects() function returns true if
|
|
95 |
this rectangle intersects with a given rectangle. The QRect class
|
|
96 |
also provides the intersected() function which returns the
|
|
97 |
intersection rectangle, and the united() function which returns the
|
|
98 |
rectangle that encloses the given rectangle and this:
|
|
99 |
|
|
100 |
\table
|
|
101 |
\row
|
|
102 |
\o \inlineimage qrect-intersect.png
|
|
103 |
\o \inlineimage qrect-unite.png
|
|
104 |
\row
|
|
105 |
\o intersected()
|
|
106 |
\o united()
|
|
107 |
\endtable
|
|
108 |
|
|
109 |
The isEmpty() function returns true if left() > right() or top() >
|
|
110 |
bottom(). Note that an empty rectangle is not valid: The isValid()
|
|
111 |
function returns true if left() <= right() \e and top() <=
|
|
112 |
bottom(). A null rectangle (isNull() == true) on the other hand,
|
|
113 |
has both width and height set to 0.
|
|
114 |
|
|
115 |
Note that due to the way QRect and QRectF are defined, an
|
|
116 |
empty QRect is defined in essentially the same way as QRectF.
|
|
117 |
|
|
118 |
Finally, QRect objects can be streamed as well as compared.
|
|
119 |
|
|
120 |
\tableofcontents
|
|
121 |
|
|
122 |
\section1 Rendering
|
|
123 |
|
|
124 |
When using an \l {QPainter::Antialiasing}{anti-aliased} painter,
|
|
125 |
the boundary line of a QRect will be rendered symmetrically on
|
|
126 |
both sides of the mathematical rectangle's boundary line. But when
|
|
127 |
using an aliased painter (the default) other rules apply.
|
|
128 |
|
|
129 |
Then, when rendering with a one pixel wide pen the QRect's boundary
|
|
130 |
line will be rendered to the right and below the mathematical
|
|
131 |
rectangle's boundary line.
|
|
132 |
|
|
133 |
When rendering with a two pixels wide pen the boundary line will
|
|
134 |
be split in the middle by the mathematical rectangle. This will be
|
|
135 |
the case whenever the pen is set to an even number of pixels,
|
|
136 |
while rendering with a pen with an odd number of pixels, the spare
|
|
137 |
pixel will be rendered to the right and below the mathematical
|
|
138 |
rectangle as in the one pixel case.
|
|
139 |
|
|
140 |
\table
|
|
141 |
\row
|
|
142 |
\o \inlineimage qrect-diagram-zero.png
|
|
143 |
\o \inlineimage qrect-diagram-one.png
|
|
144 |
\row
|
|
145 |
\o Logical representation
|
|
146 |
\o One pixel wide pen
|
|
147 |
\row
|
|
148 |
\o \inlineimage qrect-diagram-two.png
|
|
149 |
\o \inlineimage qrect-diagram-three.png
|
|
150 |
\row
|
|
151 |
\o Two pixel wide pen
|
|
152 |
\o Three pixel wide pen
|
|
153 |
\endtable
|
|
154 |
|
|
155 |
\section1 Coordinates
|
|
156 |
|
|
157 |
The QRect class provides a collection of functions that return the
|
|
158 |
various rectangle coordinates, and enable manipulation of
|
|
159 |
these. QRect also provide functions to move the rectangle relative
|
|
160 |
to the various coordinates.
|
|
161 |
|
|
162 |
For example the left(), setLeft() and moveLeft() functions as an
|
|
163 |
example: left() returns the x-coordinate of the rectangle's left
|
|
164 |
edge, setLeft() sets the left edge of the rectangle to the given x
|
|
165 |
coordinate (it may change the width, but will never change the
|
|
166 |
rectangle's right edge) and moveLeft() moves the entire rectangle
|
|
167 |
horizontally, leaving the rectangle's left edge at the given x
|
|
168 |
coordinate and its size unchanged.
|
|
169 |
|
|
170 |
\image qrect-coordinates.png
|
|
171 |
|
|
172 |
Note that for historical reasons the values returned by the
|
|
173 |
bottom() and right() functions deviate from the true bottom-right
|
|
174 |
corner of the rectangle: The right() function returns \e { left()
|
|
175 |
+ width() - 1} and the bottom() function returns \e {top() +
|
|
176 |
height() - 1}. The same is the case for the point returned by the
|
|
177 |
bottomRight() convenience function. In addition, the x and y
|
|
178 |
coordinate of the topRight() and bottomLeft() functions,
|
|
179 |
respectively, contain the same deviation from the true right and
|
|
180 |
bottom edges.
|
|
181 |
|
|
182 |
We recommend that you use x() + width() and y() + height() to find
|
|
183 |
the true bottom-right corner, and avoid right() and
|
|
184 |
bottom(). Another solution is to use QRectF: The QRectF class
|
|
185 |
defines a rectangle in the plane using floating point accuracy for
|
|
186 |
coordinates, and the QRectF::right() and QRectF::bottom()
|
|
187 |
functions \e do return the right and bottom coordinates.
|
|
188 |
|
|
189 |
It is also possible to add offsets to this rectangle's coordinates
|
|
190 |
using the adjust() function, as well as retrieve a new rectangle
|
|
191 |
based on adjustments of the original one using the adjusted()
|
|
192 |
function. If either of the width and height is negative, use the
|
|
193 |
normalized() function to retrieve a rectangle where the corners
|
|
194 |
are swapped.
|
|
195 |
|
|
196 |
In addition, QRect provides the getCoords() function which extracts
|
|
197 |
the position of the rectangle's top-left and bottom-right corner,
|
|
198 |
and the getRect() function which extracts the rectangle's top-left
|
|
199 |
corner, width and height. Use the setCoords() and setRect()
|
|
200 |
function to manipulate the rectangle's coordinates and dimensions
|
|
201 |
in one go.
|
|
202 |
|
|
203 |
\sa QRectF, QRegion
|
|
204 |
*/
|
|
205 |
|
|
206 |
/*****************************************************************************
|
|
207 |
QRect member functions
|
|
208 |
*****************************************************************************/
|
|
209 |
|
|
210 |
/*!
|
|
211 |
\fn QRect::QRect()
|
|
212 |
|
|
213 |
Constructs a null rectangle.
|
|
214 |
|
|
215 |
\sa isNull()
|
|
216 |
*/
|
|
217 |
|
|
218 |
/*!
|
|
219 |
\fn QRect::QRect(const QPoint &topLeft, const QPoint &bottomRight)
|
|
220 |
|
|
221 |
Constructs a rectangle with the given \a topLeft and \a bottomRight corners.
|
|
222 |
|
|
223 |
\sa setTopLeft(), setBottomRight()
|
|
224 |
*/
|
|
225 |
|
|
226 |
|
|
227 |
/*!
|
|
228 |
\fn QRect::QRect(const QPoint &topLeft, const QSize &size)
|
|
229 |
|
|
230 |
Constructs a rectangle with the given \a topLeft corner and the
|
|
231 |
given \a size.
|
|
232 |
|
|
233 |
\sa setTopLeft(), setSize()
|
|
234 |
*/
|
|
235 |
|
|
236 |
|
|
237 |
/*!
|
|
238 |
\fn QRect::QRect(int x, int y, int width, int height)
|
|
239 |
|
|
240 |
Constructs a rectangle with (\a x, \a y) as its top-left corner
|
|
241 |
and the given \a width and \a height.
|
|
242 |
|
|
243 |
\sa setRect()
|
|
244 |
*/
|
|
245 |
|
|
246 |
|
|
247 |
/*!
|
|
248 |
\fn bool QRect::isNull() const
|
|
249 |
|
|
250 |
Returns true if the rectangle is a null rectangle, otherwise
|
|
251 |
returns false.
|
|
252 |
|
|
253 |
A null rectangle has both the width and the height set to 0 (i.e.,
|
|
254 |
right() == left() - 1 and bottom() == top() - 1). A null rectangle
|
|
255 |
is also empty, and hence is not valid.
|
|
256 |
|
|
257 |
\sa isEmpty(), isValid()
|
|
258 |
*/
|
|
259 |
|
|
260 |
/*!
|
|
261 |
\fn bool QRect::isEmpty() const
|
|
262 |
|
|
263 |
Returns true if the rectangle is empty, otherwise returns false.
|
|
264 |
|
|
265 |
An empty rectangle has a left() > right() or top() > bottom(). An
|
|
266 |
empty rectangle is not valid (i.e., isEmpty() == !isValid()).
|
|
267 |
|
|
268 |
Use the normalized() function to retrieve a rectangle where the
|
|
269 |
corners are swapped.
|
|
270 |
|
|
271 |
\sa isNull(), isValid(), normalized()
|
|
272 |
*/
|
|
273 |
|
|
274 |
/*!
|
|
275 |
\fn bool QRect::isValid() const
|
|
276 |
|
|
277 |
Returns true if the rectangle is valid, otherwise returns false.
|
|
278 |
|
|
279 |
A valid rectangle has a left() < right() and top() <
|
|
280 |
bottom(). Note that non-trivial operations like intersections are
|
|
281 |
not defined for invalid rectangles. A valid rectangle is not empty
|
|
282 |
(i.e., isValid() == !isEmpty()).
|
|
283 |
|
|
284 |
\sa isNull(), isEmpty(), normalized()
|
|
285 |
*/
|
|
286 |
|
|
287 |
|
|
288 |
/*!
|
|
289 |
Returns a normalized rectangle; i.e., a rectangle that has a
|
|
290 |
non-negative width and height.
|
|
291 |
|
|
292 |
If width() < 0 the function swaps the left and right corners, and
|
|
293 |
it swaps the top and bottom corners if height() < 0.
|
|
294 |
|
|
295 |
\sa isValid(), isEmpty()
|
|
296 |
*/
|
|
297 |
|
|
298 |
QRect QRect::normalized() const
|
|
299 |
{
|
|
300 |
QRect r;
|
|
301 |
if (x2 < x1 - 1) { // swap bad x values
|
|
302 |
r.x1 = x2;
|
|
303 |
r.x2 = x1;
|
|
304 |
} else {
|
|
305 |
r.x1 = x1;
|
|
306 |
r.x2 = x2;
|
|
307 |
}
|
|
308 |
if (y2 < y1 - 1) { // swap bad y values
|
|
309 |
r.y1 = y2;
|
|
310 |
r.y2 = y1;
|
|
311 |
} else {
|
|
312 |
r.y1 = y1;
|
|
313 |
r.y2 = y2;
|
|
314 |
}
|
|
315 |
return r;
|
|
316 |
}
|
|
317 |
|
|
318 |
|
|
319 |
/*!
|
|
320 |
\fn QRect QRect::normalize() const
|
|
321 |
\compat
|
|
322 |
|
|
323 |
Returns a normalized rectangle; i.e., a rectangle that has a
|
|
324 |
non-negative width and height.
|
|
325 |
|
|
326 |
Use the normalized() function instead
|
|
327 |
*/
|
|
328 |
|
|
329 |
/*!
|
|
330 |
\fn int QRect::left() const
|
|
331 |
|
|
332 |
Returns the x-coordinate of the rectangle's left edge. Equivalent
|
|
333 |
to x().
|
|
334 |
|
|
335 |
\sa setLeft(), topLeft(), bottomLeft()
|
|
336 |
*/
|
|
337 |
|
|
338 |
/*!
|
|
339 |
\fn int QRect::top() const
|
|
340 |
|
|
341 |
Returns the y-coordinate of the rectangle's top edge.
|
|
342 |
Equivalent to y().
|
|
343 |
|
|
344 |
\sa setTop(), topLeft(), topRight()
|
|
345 |
*/
|
|
346 |
|
|
347 |
/*!
|
|
348 |
\fn int QRect::right() const
|
|
349 |
|
|
350 |
Returns the x-coordinate of the rectangle's right edge.
|
|
351 |
|
|
352 |
Note that for historical reasons this function returns left() +
|
|
353 |
width() - 1; use x() + width() to retrieve the true x-coordinate.
|
|
354 |
|
|
355 |
\sa setRight(), topRight(), bottomRight()
|
|
356 |
*/
|
|
357 |
|
|
358 |
/*!
|
|
359 |
\fn int QRect::bottom() const
|
|
360 |
|
|
361 |
Returns the y-coordinate of the rectangle's bottom edge.
|
|
362 |
|
|
363 |
Note that for historical reasons this function returns top() +
|
|
364 |
height() - 1; use y() + height() to retrieve the true y-coordinate.
|
|
365 |
|
|
366 |
\sa setBottom(), bottomLeft(), bottomRight()
|
|
367 |
*/
|
|
368 |
|
|
369 |
/*!
|
|
370 |
\fn int &QRect::rLeft()
|
|
371 |
\compat
|
|
372 |
|
|
373 |
Returns a reference to the left coordinate of the rectangle.
|
|
374 |
|
|
375 |
Use the left() function instead.
|
|
376 |
*/
|
|
377 |
|
|
378 |
/*!
|
|
379 |
\fn int &QRect::rTop()
|
|
380 |
\compat
|
|
381 |
|
|
382 |
Returns a reference to the top coordinate of the rectangle.
|
|
383 |
|
|
384 |
Use the top() function instead.
|
|
385 |
*/
|
|
386 |
|
|
387 |
/*!
|
|
388 |
\fn int &QRect::rRight()
|
|
389 |
\compat
|
|
390 |
|
|
391 |
Returns a reference to the right coordinate of the rectangle.
|
|
392 |
|
|
393 |
Use the right() function instead.
|
|
394 |
*/
|
|
395 |
|
|
396 |
/*!
|
|
397 |
\fn int &QRect::rBottom()
|
|
398 |
\compat
|
|
399 |
|
|
400 |
Returns a reference to the bottom coordinate of the rectangle.
|
|
401 |
|
|
402 |
Use the bottom() function instead.
|
|
403 |
*/
|
|
404 |
|
|
405 |
/*!
|
|
406 |
\fn int QRect::x() const
|
|
407 |
|
|
408 |
Returns the x-coordinate of the rectangle's left edge. Equivalent to left().
|
|
409 |
|
|
410 |
\sa setX(), y(), topLeft()
|
|
411 |
*/
|
|
412 |
|
|
413 |
/*!
|
|
414 |
\fn int QRect::y() const
|
|
415 |
|
|
416 |
Returns the y-coordinate of the rectangle's top edge. Equivalent to top().
|
|
417 |
|
|
418 |
\sa setY(), x(), topLeft()
|
|
419 |
*/
|
|
420 |
|
|
421 |
/*!
|
|
422 |
\fn void QRect::setLeft(int x)
|
|
423 |
|
|
424 |
Sets the left edge of the rectangle to the given \a x
|
|
425 |
coordinate. May change the width, but will never change the right
|
|
426 |
edge of the rectangle.
|
|
427 |
|
|
428 |
Equivalent to setX().
|
|
429 |
|
|
430 |
\sa left(), moveLeft()
|
|
431 |
*/
|
|
432 |
|
|
433 |
/*!
|
|
434 |
\fn void QRect::setTop(int y)
|
|
435 |
|
|
436 |
Sets the top edge of the rectangle to the given \a y
|
|
437 |
coordinate. May change the height, but will never change the
|
|
438 |
bottom edge of the rectangle.
|
|
439 |
|
|
440 |
Equivalent to setY().
|
|
441 |
|
|
442 |
\sa top(), moveTop()
|
|
443 |
*/
|
|
444 |
|
|
445 |
/*!
|
|
446 |
\fn void QRect::setRight(int x)
|
|
447 |
|
|
448 |
Sets the right edge of the rectangle to the given \a x
|
|
449 |
coordinate. May change the width, but will never change the left
|
|
450 |
edge of the rectangle.
|
|
451 |
|
|
452 |
\sa right(), moveRight()
|
|
453 |
*/
|
|
454 |
|
|
455 |
/*!
|
|
456 |
\fn void QRect::setBottom(int y)
|
|
457 |
|
|
458 |
Sets the bottom edge of the rectangle to the given \a y
|
|
459 |
coordinate. May change the height, but will never change the top
|
|
460 |
edge of the rectangle.
|
|
461 |
|
|
462 |
\sa bottom(), moveBottom(),
|
|
463 |
*/
|
|
464 |
|
|
465 |
/*!
|
|
466 |
\fn void QRect::setX(int x)
|
|
467 |
|
|
468 |
Sets the left edge of the rectangle to the given \a x
|
|
469 |
coordinate. May change the width, but will never change the right
|
|
470 |
edge of the rectangle.
|
|
471 |
|
|
472 |
Equivalent to setLeft().
|
|
473 |
|
|
474 |
\sa x(), setY(), setTopLeft()
|
|
475 |
*/
|
|
476 |
|
|
477 |
/*!
|
|
478 |
\fn void QRect::setY(int y)
|
|
479 |
|
|
480 |
Sets the top edge of the rectangle to the given \a y
|
|
481 |
coordinate. May change the height, but will never change the
|
|
482 |
bottom edge of the rectangle.
|
|
483 |
|
|
484 |
Equivalent to setTop().
|
|
485 |
|
|
486 |
\sa y(), setX(), setTopLeft()
|
|
487 |
*/
|
|
488 |
|
|
489 |
/*!
|
|
490 |
\fn void QRect::setTopLeft(const QPoint &position)
|
|
491 |
|
|
492 |
Set the top-left corner of the rectangle to the given \a
|
|
493 |
position. May change the size, but will never change the
|
|
494 |
bottom-right corner of the rectangle.
|
|
495 |
|
|
496 |
\sa topLeft(), moveTopLeft()
|
|
497 |
*/
|
|
498 |
|
|
499 |
/*!
|
|
500 |
\fn void QRect::setBottomRight(const QPoint &position)
|
|
501 |
|
|
502 |
Set the bottom-right corner of the rectangle to the given \a
|
|
503 |
position. May change the size, but will never change the
|
|
504 |
top-left corner of the rectangle.
|
|
505 |
|
|
506 |
\sa bottomRight(), moveBottomRight()
|
|
507 |
*/
|
|
508 |
|
|
509 |
/*!
|
|
510 |
\fn void QRect::setTopRight(const QPoint &position)
|
|
511 |
|
|
512 |
Set the top-right corner of the rectangle to the given \a
|
|
513 |
position. May change the size, but will never change the
|
|
514 |
bottom-left corner of the rectangle.
|
|
515 |
|
|
516 |
\sa topRight(), moveTopRight()
|
|
517 |
*/
|
|
518 |
|
|
519 |
/*!
|
|
520 |
\fn void QRect::setBottomLeft(const QPoint &position)
|
|
521 |
|
|
522 |
Set the bottom-left corner of the rectangle to the given \a
|
|
523 |
position. May change the size, but will never change the
|
|
524 |
top-right corner of the rectangle.
|
|
525 |
|
|
526 |
\sa bottomLeft(), moveBottomLeft()
|
|
527 |
*/
|
|
528 |
|
|
529 |
/*!
|
|
530 |
\fn QPoint QRect::topLeft() const
|
|
531 |
|
|
532 |
Returns the position of the rectangle's top-left corner.
|
|
533 |
|
|
534 |
\sa setTopLeft(), top(), left()
|
|
535 |
*/
|
|
536 |
|
|
537 |
/*!
|
|
538 |
\fn QPoint QRect::bottomRight() const
|
|
539 |
|
|
540 |
Returns the position of the rectangle's bottom-right corner.
|
|
541 |
|
|
542 |
Note that for historical reasons this function returns
|
|
543 |
QPoint(left() + width() -1, top() + height() - 1).
|
|
544 |
|
|
545 |
\sa setBottomRight(), bottom(), right()
|
|
546 |
*/
|
|
547 |
|
|
548 |
/*!
|
|
549 |
\fn QPoint QRect::topRight() const
|
|
550 |
|
|
551 |
Returns the position of the rectangle's top-right corner.
|
|
552 |
|
|
553 |
Note that for historical reasons this function returns
|
|
554 |
QPoint(left() + width() -1, top()).
|
|
555 |
|
|
556 |
\sa setTopRight(), top(), right()
|
|
557 |
*/
|
|
558 |
|
|
559 |
/*!
|
|
560 |
\fn QPoint QRect::bottomLeft() const
|
|
561 |
|
|
562 |
Returns the position of the rectangle's bottom-left corner. Note
|
|
563 |
that for historical reasons this function returns QPoint(left(),
|
|
564 |
top() + height() - 1).
|
|
565 |
|
|
566 |
\sa setBottomLeft(), bottom(), left()
|
|
567 |
*/
|
|
568 |
|
|
569 |
/*!
|
|
570 |
\fn QPoint QRect::center() const
|
|
571 |
|
|
572 |
Returns the center point of the rectangle.
|
|
573 |
|
|
574 |
\sa moveCenter()
|
|
575 |
*/
|
|
576 |
|
|
577 |
|
|
578 |
/*!
|
|
579 |
\fn void QRect::getRect(int *x, int *y, int *width, int *height) const
|
|
580 |
|
|
581 |
Extracts the position of the rectangle's top-left corner to *\a x
|
|
582 |
and *\a y, and its dimensions to *\a width and *\a height.
|
|
583 |
|
|
584 |
\sa setRect(), getCoords()
|
|
585 |
*/
|
|
586 |
|
|
587 |
|
|
588 |
/*!
|
|
589 |
\fn void QRect::getCoords(int *x1, int *y1, int *x2, int *y2) const
|
|
590 |
|
|
591 |
Extracts the position of the rectangle's top-left corner to *\a x1
|
|
592 |
and *\a y1, and the position of the bottom-right corner to *\a x2
|
|
593 |
and *\a y2.
|
|
594 |
|
|
595 |
\sa setCoords(), getRect()
|
|
596 |
*/
|
|
597 |
|
|
598 |
/*!
|
|
599 |
\fn void QRect::rect(int *x, int *y, int *width, int *height) const
|
|
600 |
\compat
|
|
601 |
|
|
602 |
Extracts the position of the rectangle's top-left corner to *\a x and
|
|
603 |
*\a y, and its dimensions to *\a width and * \a height.
|
|
604 |
|
|
605 |
Use the getRect() function instead.
|
|
606 |
*/
|
|
607 |
|
|
608 |
|
|
609 |
/*!
|
|
610 |
\fn void QRect::coords(int *x1, int *y1, int *x2, int *y2) const
|
|
611 |
\compat
|
|
612 |
|
|
613 |
Extracts the position of the rectangle's top-left corner to *\a x1
|
|
614 |
and *\a y1, and the position of the bottom-right corner to *\a x2
|
|
615 |
and *\a y2.
|
|
616 |
|
|
617 |
Use the getCoords() function instead.
|
|
618 |
*/
|
|
619 |
|
|
620 |
/*!
|
|
621 |
\fn void QRect::moveLeft(int x)
|
|
622 |
|
|
623 |
Moves the rectangle horizontally, leaving the rectangle's left
|
|
624 |
edge at the given \a x coordinate. The rectangle's size is
|
|
625 |
unchanged.
|
|
626 |
|
|
627 |
\sa left(), setLeft(), moveRight()
|
|
628 |
*/
|
|
629 |
|
|
630 |
/*!
|
|
631 |
\fn void QRect::moveTop(int y)
|
|
632 |
|
|
633 |
Moves the rectangle vertically, leaving the rectangle's top edge
|
|
634 |
at the given \a y coordinate. The rectangle's size is unchanged.
|
|
635 |
|
|
636 |
\sa top(), setTop(), moveBottom()
|
|
637 |
*/
|
|
638 |
|
|
639 |
|
|
640 |
/*!
|
|
641 |
\fn void QRect::moveRight(int x)
|
|
642 |
|
|
643 |
Moves the rectangle horizontally, leaving the rectangle's right
|
|
644 |
edge at the given \a x coordinate. The rectangle's size is
|
|
645 |
unchanged.
|
|
646 |
|
|
647 |
\sa right(), setRight(), moveLeft()
|
|
648 |
*/
|
|
649 |
|
|
650 |
|
|
651 |
/*!
|
|
652 |
\fn void QRect::moveBottom(int y)
|
|
653 |
|
|
654 |
Moves the rectangle vertically, leaving the rectangle's bottom
|
|
655 |
edge at the given \a y coordinate. The rectangle's size is
|
|
656 |
unchanged.
|
|
657 |
|
|
658 |
\sa bottom(), setBottom(), moveTop()
|
|
659 |
*/
|
|
660 |
|
|
661 |
|
|
662 |
/*!
|
|
663 |
\fn void QRect::moveTopLeft(const QPoint &position)
|
|
664 |
|
|
665 |
Moves the rectangle, leaving the top-left corner at the given \a
|
|
666 |
position. The rectangle's size is unchanged.
|
|
667 |
|
|
668 |
\sa setTopLeft(), moveTop(), moveLeft()
|
|
669 |
*/
|
|
670 |
|
|
671 |
|
|
672 |
/*!
|
|
673 |
\fn void QRect::moveBottomRight(const QPoint &position)
|
|
674 |
|
|
675 |
Moves the rectangle, leaving the bottom-right corner at the given
|
|
676 |
\a position. The rectangle's size is unchanged.
|
|
677 |
|
|
678 |
\sa setBottomRight(), moveRight(), moveBottom()
|
|
679 |
*/
|
|
680 |
|
|
681 |
|
|
682 |
/*!
|
|
683 |
\fn void QRect::moveTopRight(const QPoint &position)
|
|
684 |
|
|
685 |
Moves the rectangle, leaving the top-right corner at the given \a
|
|
686 |
position. The rectangle's size is unchanged.
|
|
687 |
|
|
688 |
\sa setTopRight(), moveTop(), moveRight()
|
|
689 |
*/
|
|
690 |
|
|
691 |
|
|
692 |
/*!
|
|
693 |
\fn void QRect::moveBottomLeft(const QPoint &position)
|
|
694 |
|
|
695 |
Moves the rectangle, leaving the bottom-left corner at the given
|
|
696 |
\a position. The rectangle's size is unchanged.
|
|
697 |
|
|
698 |
\sa setBottomLeft(), moveBottom(), moveLeft()
|
|
699 |
*/
|
|
700 |
|
|
701 |
|
|
702 |
/*!
|
|
703 |
\fn void QRect::moveCenter(const QPoint &position)
|
|
704 |
|
|
705 |
Moves the rectangle, leaving the center point at the given \a
|
|
706 |
position. The rectangle's size is unchanged.
|
|
707 |
|
|
708 |
\sa center()
|
|
709 |
*/
|
|
710 |
|
|
711 |
void QRect::moveCenter(const QPoint &p)
|
|
712 |
{
|
|
713 |
int w = x2 - x1;
|
|
714 |
int h = y2 - y1;
|
|
715 |
x1 = p.x() - w/2;
|
|
716 |
y1 = p.y() - h/2;
|
|
717 |
x2 = x1 + w;
|
|
718 |
y2 = y1 + h;
|
|
719 |
}
|
|
720 |
|
|
721 |
/*!
|
|
722 |
\fn void QRect::moveBy(int dx, int dy)
|
|
723 |
\compat
|
|
724 |
|
|
725 |
Moves the rectangle \a dx along the x axis and \a dy along the y
|
|
726 |
axis, relative to the current position.
|
|
727 |
|
|
728 |
Use the translate() function instead.
|
|
729 |
*/
|
|
730 |
|
|
731 |
/*!
|
|
732 |
\fn void QRect::moveBy(const QPoint &)
|
|
733 |
\compat
|
|
734 |
|
|
735 |
Use the translate() function instead.
|
|
736 |
*/
|
|
737 |
|
|
738 |
/*!
|
|
739 |
\fn void QRect::moveTo(int x, int y)
|
|
740 |
|
|
741 |
Moves the rectangle, leaving the top-left corner at the given
|
|
742 |
position (\a x, \a y). The rectangle's size is unchanged.
|
|
743 |
|
|
744 |
\sa translate(), moveTopLeft()
|
|
745 |
*/
|
|
746 |
|
|
747 |
/*!
|
|
748 |
\fn void QRect::moveTo(const QPoint &position)
|
|
749 |
|
|
750 |
Moves the rectangle, leaving the top-left corner at the given \a
|
|
751 |
position.
|
|
752 |
*/
|
|
753 |
|
|
754 |
/*!
|
|
755 |
\fn void QRect::translate(int dx, int dy)
|
|
756 |
|
|
757 |
Moves the rectangle \a dx along the x axis and \a dy along the y
|
|
758 |
axis, relative to the current position. Positive values move the
|
|
759 |
rectangle to the right and down.
|
|
760 |
|
|
761 |
\sa moveTopLeft(), moveTo(), translated()
|
|
762 |
*/
|
|
763 |
|
|
764 |
|
|
765 |
/*!
|
|
766 |
\fn void QRect::translate(const QPoint &offset)
|
|
767 |
\overload
|
|
768 |
|
|
769 |
Moves the rectangle \a{offset}.\l{QPoint::x()}{x()} along the x
|
|
770 |
axis and \a{offset}.\l{QPoint::y()}{y()} along the y axis,
|
|
771 |
relative to the current position.
|
|
772 |
*/
|
|
773 |
|
|
774 |
|
|
775 |
/*!
|
|
776 |
\fn QRect QRect::translated(int dx, int dy) const
|
|
777 |
|
|
778 |
Returns a copy of the rectangle that is translated \a dx along the
|
|
779 |
x axis and \a dy along the y axis, relative to the current
|
|
780 |
position. Positive values move the rectangle to the right and
|
|
781 |
down.
|
|
782 |
|
|
783 |
\sa translate()
|
|
784 |
|
|
785 |
*/
|
|
786 |
|
|
787 |
|
|
788 |
/*!
|
|
789 |
\fn QRect QRect::translated(const QPoint &offset) const
|
|
790 |
|
|
791 |
\overload
|
|
792 |
|
|
793 |
Returns a copy of the rectangle that is translated
|
|
794 |
\a{offset}.\l{QPoint::x()}{x()} along the x axis and
|
|
795 |
\a{offset}.\l{QPoint::y()}{y()} along the y axis, relative to the
|
|
796 |
current position.
|
|
797 |
*/
|
|
798 |
|
|
799 |
|
|
800 |
/*!
|
|
801 |
\fn void QRect::setRect(int x, int y, int width, int height)
|
|
802 |
|
|
803 |
Sets the coordinates of the rectangle's top-left corner to (\a{x},
|
|
804 |
\a{y}), and its size to the given \a width and \a height.
|
|
805 |
|
|
806 |
\sa getRect(), setCoords()
|
|
807 |
*/
|
|
808 |
|
|
809 |
|
|
810 |
/*!
|
|
811 |
\fn void QRect::setCoords(int x1, int y1, int x2, int y2)
|
|
812 |
|
|
813 |
Sets the coordinates of the rectangle's top-left corner to (\a x1,
|
|
814 |
\a y1), and the coordinates of its bottom-right corner to (\a x2,
|
|
815 |
\a y2).
|
|
816 |
|
|
817 |
\sa getCoords(), setRect()
|
|
818 |
*/
|
|
819 |
|
|
820 |
|
|
821 |
/*!
|
|
822 |
\fn void QRect::addCoords(int dx1, int dy1, int dx2, int dy2)
|
|
823 |
\compat
|
|
824 |
|
|
825 |
Adds \a dx1, \a dy1, \a dx2 and \a dy2 to the existing coordinates
|
|
826 |
of the rectangle respectively.
|
|
827 |
|
|
828 |
Use the adjust() function instead.
|
|
829 |
*/
|
|
830 |
|
|
831 |
/*! \fn QRect QRect::adjusted(int dx1, int dy1, int dx2, int dy2) const
|
|
832 |
|
|
833 |
Returns a new rectangle with \a dx1, \a dy1, \a dx2 and \a dy2
|
|
834 |
added respectively to the existing coordinates of this rectangle.
|
|
835 |
|
|
836 |
\sa adjust()
|
|
837 |
*/
|
|
838 |
|
|
839 |
/*! \fn void QRect::adjust(int dx1, int dy1, int dx2, int dy2)
|
|
840 |
|
|
841 |
Adds \a dx1, \a dy1, \a dx2 and \a dy2 respectively to the
|
|
842 |
existing coordinates of the rectangle.
|
|
843 |
|
|
844 |
\sa adjusted(), setRect()
|
|
845 |
*/
|
|
846 |
|
|
847 |
/*!
|
|
848 |
\fn QSize QRect::size() const
|
|
849 |
|
|
850 |
Returns the size of the rectangle.
|
|
851 |
|
|
852 |
\sa setSize(), width(), height()
|
|
853 |
*/
|
|
854 |
|
|
855 |
/*!
|
|
856 |
\fn int QRect::width() const
|
|
857 |
|
|
858 |
Returns the width of the rectangle.
|
|
859 |
|
|
860 |
\sa setWidth(), height(), size()
|
|
861 |
*/
|
|
862 |
|
|
863 |
/*!
|
|
864 |
\fn int QRect::height() const
|
|
865 |
|
|
866 |
Returns the height of the rectangle.
|
|
867 |
|
|
868 |
\sa setHeight(), width(), size()
|
|
869 |
*/
|
|
870 |
|
|
871 |
/*!
|
|
872 |
\fn void QRect::setWidth(int width)
|
|
873 |
|
|
874 |
Sets the width of the rectangle to the given \a width. The right
|
|
875 |
edge is changed, but not the left one.
|
|
876 |
|
|
877 |
\sa width(), setSize()
|
|
878 |
*/
|
|
879 |
|
|
880 |
|
|
881 |
/*!
|
|
882 |
\fn void QRect::setHeight(int height)
|
|
883 |
|
|
884 |
Sets the height of the rectangle to the given \a height. The bottom
|
|
885 |
edge is changed, but not the top one.
|
|
886 |
|
|
887 |
\sa height(), setSize()
|
|
888 |
*/
|
|
889 |
|
|
890 |
|
|
891 |
/*!
|
|
892 |
\fn void QRect::setSize(const QSize &size)
|
|
893 |
|
|
894 |
Sets the size of the rectangle to the given \a size. The top-left
|
|
895 |
corner is not moved.
|
|
896 |
|
|
897 |
\sa size(), setWidth(), setHeight()
|
|
898 |
*/
|
|
899 |
|
|
900 |
|
|
901 |
/*!
|
|
902 |
\fn bool QRect::contains(const QPoint &point, bool proper) const
|
|
903 |
|
|
904 |
Returns true if the given \a point is inside or on the edge of
|
|
905 |
the rectangle, otherwise returns false. If \a proper is true, this
|
|
906 |
function only returns true if the given \a point is \e inside the
|
|
907 |
rectangle (i.e., not on the edge).
|
|
908 |
|
|
909 |
\sa intersects()
|
|
910 |
*/
|
|
911 |
|
|
912 |
bool QRect::contains(const QPoint &p, bool proper) const
|
|
913 |
{
|
|
914 |
int l, r;
|
|
915 |
if (x2 < x1 - 1) {
|
|
916 |
l = x2;
|
|
917 |
r = x1;
|
|
918 |
} else {
|
|
919 |
l = x1;
|
|
920 |
r = x2;
|
|
921 |
}
|
|
922 |
if (proper) {
|
|
923 |
if (p.x() <= l || p.x() >= r)
|
|
924 |
return false;
|
|
925 |
} else {
|
|
926 |
if (p.x() < l || p.x() > r)
|
|
927 |
return false;
|
|
928 |
}
|
|
929 |
int t, b;
|
|
930 |
if (y2 < y1 - 1) {
|
|
931 |
t = y2;
|
|
932 |
b = y1;
|
|
933 |
} else {
|
|
934 |
t = y1;
|
|
935 |
b = y2;
|
|
936 |
}
|
|
937 |
if (proper) {
|
|
938 |
if (p.y() <= t || p.y() >= b)
|
|
939 |
return false;
|
|
940 |
} else {
|
|
941 |
if (p.y() < t || p.y() > b)
|
|
942 |
return false;
|
|
943 |
}
|
|
944 |
return true;
|
|
945 |
}
|
|
946 |
|
|
947 |
|
|
948 |
/*!
|
|
949 |
\fn bool QRect::contains(int x, int y, bool proper) const
|
|
950 |
\overload
|
|
951 |
|
|
952 |
Returns true if the point (\a x, \a y) is inside or on the edge of
|
|
953 |
the rectangle, otherwise returns false. If \a proper is true, this
|
|
954 |
function only returns true if the point is entirely inside the
|
|
955 |
rectangle(not on the edge).
|
|
956 |
*/
|
|
957 |
|
|
958 |
/*!
|
|
959 |
\fn bool QRect::contains(int x, int y) const
|
|
960 |
\overload
|
|
961 |
|
|
962 |
Returns true if the point (\a x, \a y) is inside this rectangle,
|
|
963 |
otherwise returns false.
|
|
964 |
*/
|
|
965 |
|
|
966 |
/*!
|
|
967 |
\fn bool QRect::contains(const QRect &rectangle, bool proper) const
|
|
968 |
\overload
|
|
969 |
|
|
970 |
Returns true if the given \a rectangle is inside this rectangle.
|
|
971 |
otherwise returns false. If \a proper is true, this function only
|
|
972 |
returns true if the \a rectangle is entirely inside this
|
|
973 |
rectangle (not on the edge).
|
|
974 |
*/
|
|
975 |
|
|
976 |
bool QRect::contains(const QRect &r, bool proper) const
|
|
977 |
{
|
|
978 |
if (isNull() || r.isNull())
|
|
979 |
return false;
|
|
980 |
|
|
981 |
int l1 = x1;
|
|
982 |
int r1 = x1;
|
|
983 |
if (x2 - x1 + 1 < 0)
|
|
984 |
l1 = x2;
|
|
985 |
else
|
|
986 |
r1 = x2;
|
|
987 |
|
|
988 |
int l2 = r.x1;
|
|
989 |
int r2 = r.x1;
|
|
990 |
if (r.x2 - r.x1 + 1 < 0)
|
|
991 |
l2 = r.x2;
|
|
992 |
else
|
|
993 |
r2 = r.x2;
|
|
994 |
|
|
995 |
if (proper) {
|
|
996 |
if (l2 <= l1 || r2 >= r1)
|
|
997 |
return false;
|
|
998 |
} else {
|
|
999 |
if (l2 < l1 || r2 > r1)
|
|
1000 |
return false;
|
|
1001 |
}
|
|
1002 |
|
|
1003 |
int t1 = y1;
|
|
1004 |
int b1 = y1;
|
|
1005 |
if (y2 - y1 + 1 < 0)
|
|
1006 |
t1 = y2;
|
|
1007 |
else
|
|
1008 |
b1 = y2;
|
|
1009 |
|
|
1010 |
int t2 = r.y1;
|
|
1011 |
int b2 = r.y1;
|
|
1012 |
if (r.y2 - r.y1 + 1 < 0)
|
|
1013 |
t2 = r.y2;
|
|
1014 |
else
|
|
1015 |
b2 = r.y2;
|
|
1016 |
|
|
1017 |
if (proper) {
|
|
1018 |
if (t2 <= t1 || b2 >= b1)
|
|
1019 |
return false;
|
|
1020 |
} else {
|
|
1021 |
if (t2 < t1 || b2 > b1)
|
|
1022 |
return false;
|
|
1023 |
}
|
|
1024 |
|
|
1025 |
return true;
|
|
1026 |
}
|
|
1027 |
|
|
1028 |
/*!
|
|
1029 |
\fn QRect& QRect::operator|=(const QRect &rectangle)
|
|
1030 |
|
|
1031 |
Unites this rectangle with the given \a rectangle.
|
|
1032 |
|
|
1033 |
\sa united(), operator|()
|
|
1034 |
*/
|
|
1035 |
|
|
1036 |
/*!
|
|
1037 |
\fn QRect& QRect::operator&=(const QRect &rectangle)
|
|
1038 |
|
|
1039 |
Intersects this rectangle with the given \a rectangle.
|
|
1040 |
|
|
1041 |
\sa intersected(), operator&()
|
|
1042 |
*/
|
|
1043 |
|
|
1044 |
|
|
1045 |
/*!
|
|
1046 |
\fn QRect QRect::operator|(const QRect &rectangle) const
|
|
1047 |
|
|
1048 |
Returns the bounding rectangle of this rectangle and the given \a
|
|
1049 |
rectangle.
|
|
1050 |
|
|
1051 |
\sa operator|=(), united()
|
|
1052 |
*/
|
|
1053 |
|
|
1054 |
QRect QRect::operator|(const QRect &r) const
|
|
1055 |
{
|
|
1056 |
if (isNull())
|
|
1057 |
return r;
|
|
1058 |
if (r.isNull())
|
|
1059 |
return *this;
|
|
1060 |
|
|
1061 |
int l1 = x1;
|
|
1062 |
int r1 = x1;
|
|
1063 |
if (x2 - x1 + 1 < 0)
|
|
1064 |
l1 = x2;
|
|
1065 |
else
|
|
1066 |
r1 = x2;
|
|
1067 |
|
|
1068 |
int l2 = r.x1;
|
|
1069 |
int r2 = r.x1;
|
|
1070 |
if (r.x2 - r.x1 + 1 < 0)
|
|
1071 |
l2 = r.x2;
|
|
1072 |
else
|
|
1073 |
r2 = r.x2;
|
|
1074 |
|
|
1075 |
int t1 = y1;
|
|
1076 |
int b1 = y1;
|
|
1077 |
if (y2 - y1 + 1 < 0)
|
|
1078 |
t1 = y2;
|
|
1079 |
else
|
|
1080 |
b1 = y2;
|
|
1081 |
|
|
1082 |
int t2 = r.y1;
|
|
1083 |
int b2 = r.y1;
|
|
1084 |
if (r.y2 - r.y1 + 1 < 0)
|
|
1085 |
t2 = r.y2;
|
|
1086 |
else
|
|
1087 |
b2 = r.y2;
|
|
1088 |
|
|
1089 |
QRect tmp;
|
|
1090 |
tmp.x1 = qMin(l1, l2);
|
|
1091 |
tmp.x2 = qMax(r1, r2);
|
|
1092 |
tmp.y1 = qMin(t1, t2);
|
|
1093 |
tmp.y2 = qMax(b1, b2);
|
|
1094 |
return tmp;
|
|
1095 |
}
|
|
1096 |
|
|
1097 |
/*!
|
|
1098 |
\fn QRect QRect::unite(const QRect &rectangle) const
|
|
1099 |
\obsolete
|
|
1100 |
|
|
1101 |
Use united(\a rectangle) instead.
|
|
1102 |
*/
|
|
1103 |
|
|
1104 |
/*!
|
|
1105 |
\fn QRect QRect::united(const QRect &rectangle) const
|
|
1106 |
\since 4.2
|
|
1107 |
|
|
1108 |
Returns the bounding rectangle of this rectangle and the given \a rectangle.
|
|
1109 |
|
|
1110 |
\image qrect-unite.png
|
|
1111 |
|
|
1112 |
\sa intersected()
|
|
1113 |
*/
|
|
1114 |
|
|
1115 |
|
|
1116 |
/*!
|
|
1117 |
\fn QRect QRect::operator&(const QRect &rectangle) const
|
|
1118 |
|
|
1119 |
Returns the intersection of this rectangle and the given \a
|
|
1120 |
rectangle. Returns an empty rectangle if there is no intersection.
|
|
1121 |
|
|
1122 |
\sa operator&=(), intersected()
|
|
1123 |
*/
|
|
1124 |
|
|
1125 |
QRect QRect::operator&(const QRect &r) const
|
|
1126 |
{
|
|
1127 |
if (isNull() || r.isNull())
|
|
1128 |
return QRect();
|
|
1129 |
|
|
1130 |
int l1 = x1;
|
|
1131 |
int r1 = x1;
|
|
1132 |
if (x2 - x1 + 1 < 0)
|
|
1133 |
l1 = x2;
|
|
1134 |
else
|
|
1135 |
r1 = x2;
|
|
1136 |
|
|
1137 |
int l2 = r.x1;
|
|
1138 |
int r2 = r.x1;
|
|
1139 |
if (r.x2 - r.x1 + 1 < 0)
|
|
1140 |
l2 = r.x2;
|
|
1141 |
else
|
|
1142 |
r2 = r.x2;
|
|
1143 |
|
|
1144 |
if (l1 > r2 || l2 > r1)
|
|
1145 |
return QRect();
|
|
1146 |
|
|
1147 |
int t1 = y1;
|
|
1148 |
int b1 = y1;
|
|
1149 |
if (y2 - y1 + 1 < 0)
|
|
1150 |
t1 = y2;
|
|
1151 |
else
|
|
1152 |
b1 = y2;
|
|
1153 |
|
|
1154 |
int t2 = r.y1;
|
|
1155 |
int b2 = r.y1;
|
|
1156 |
if (r.y2 - r.y1 + 1 < 0)
|
|
1157 |
t2 = r.y2;
|
|
1158 |
else
|
|
1159 |
b2 = r.y2;
|
|
1160 |
|
|
1161 |
if (t1 > b2 || t2 > b1)
|
|
1162 |
return QRect();
|
|
1163 |
|
|
1164 |
QRect tmp;
|
|
1165 |
tmp.x1 = qMax(l1, l2);
|
|
1166 |
tmp.x2 = qMin(r1, r2);
|
|
1167 |
tmp.y1 = qMax(t1, t2);
|
|
1168 |
tmp.y2 = qMin(b1, b2);
|
|
1169 |
return tmp;
|
|
1170 |
}
|
|
1171 |
|
|
1172 |
/*!
|
|
1173 |
\fn QRect QRect::intersect(const QRect &rectangle) const
|
|
1174 |
\obsolete
|
|
1175 |
|
|
1176 |
Use intersected(\a rectangle) instead.
|
|
1177 |
*/
|
|
1178 |
|
|
1179 |
/*!
|
|
1180 |
\fn QRect QRect::intersected(const QRect &rectangle) const
|
|
1181 |
\since 4.2
|
|
1182 |
|
|
1183 |
Returns the intersection of this rectangle and the given \a
|
|
1184 |
rectangle. Note that \c{r.intersected(s)} is equivalent to \c{r & s}.
|
|
1185 |
|
|
1186 |
\image qrect-intersect.png
|
|
1187 |
|
|
1188 |
\sa intersects(), united(), operator&=()
|
|
1189 |
*/
|
|
1190 |
|
|
1191 |
/*!
|
|
1192 |
\fn bool QRect::intersects(const QRect &rectangle) const
|
|
1193 |
|
|
1194 |
Returns true if this rectangle intersects with the given \a
|
|
1195 |
rectangle (i.e., there is at least one pixel that is within both
|
|
1196 |
rectangles), otherwise returns false.
|
|
1197 |
|
|
1198 |
The intersection rectangle can be retrieved using the intersected()
|
|
1199 |
function.
|
|
1200 |
|
|
1201 |
\sa contains()
|
|
1202 |
*/
|
|
1203 |
|
|
1204 |
bool QRect::intersects(const QRect &r) const
|
|
1205 |
{
|
|
1206 |
if (isNull() || r.isNull())
|
|
1207 |
return false;
|
|
1208 |
|
|
1209 |
int l1 = x1;
|
|
1210 |
int r1 = x1;
|
|
1211 |
if (x2 - x1 + 1 < 0)
|
|
1212 |
l1 = x2;
|
|
1213 |
else
|
|
1214 |
r1 = x2;
|
|
1215 |
|
|
1216 |
int l2 = r.x1;
|
|
1217 |
int r2 = r.x1;
|
|
1218 |
if (r.x2 - r.x1 + 1 < 0)
|
|
1219 |
l2 = r.x2;
|
|
1220 |
else
|
|
1221 |
r2 = r.x2;
|
|
1222 |
|
|
1223 |
if (l1 > r2 || l2 > r1)
|
|
1224 |
return false;
|
|
1225 |
|
|
1226 |
int t1 = y1;
|
|
1227 |
int b1 = y1;
|
|
1228 |
if (y2 - y1 + 1 < 0)
|
|
1229 |
t1 = y2;
|
|
1230 |
else
|
|
1231 |
b1 = y2;
|
|
1232 |
|
|
1233 |
int t2 = r.y1;
|
|
1234 |
int b2 = r.y1;
|
|
1235 |
if (r.y2 - r.y1 + 1 < 0)
|
|
1236 |
t2 = r.y2;
|
|
1237 |
else
|
|
1238 |
b2 = r.y2;
|
|
1239 |
|
|
1240 |
if (t1 > b2 || t2 > b1)
|
|
1241 |
return false;
|
|
1242 |
|
|
1243 |
return true;
|
|
1244 |
}
|
|
1245 |
|
|
1246 |
/*!
|
|
1247 |
\fn bool operator==(const QRect &r1, const QRect &r2)
|
|
1248 |
\relates QRect
|
|
1249 |
|
|
1250 |
Returns true if the rectangles \a r1 and \a r2 are equal,
|
|
1251 |
otherwise returns false.
|
|
1252 |
*/
|
|
1253 |
|
|
1254 |
|
|
1255 |
/*!
|
|
1256 |
\fn bool operator!=(const QRect &r1, const QRect &r2)
|
|
1257 |
\relates QRect
|
|
1258 |
|
|
1259 |
Returns true if the rectangles \a r1 and \a r2 are different, otherwise
|
|
1260 |
returns false.
|
|
1261 |
*/
|
|
1262 |
|
|
1263 |
|
|
1264 |
/*****************************************************************************
|
|
1265 |
QRect stream functions
|
|
1266 |
*****************************************************************************/
|
|
1267 |
#ifndef QT_NO_DATASTREAM
|
|
1268 |
/*!
|
|
1269 |
\fn QDataStream &operator<<(QDataStream &stream, const QRect &rectangle)
|
|
1270 |
\relates QRect
|
|
1271 |
|
|
1272 |
Writes the given \a rectangle to the given \a stream, and returns
|
|
1273 |
a reference to the stream.
|
|
1274 |
|
|
1275 |
\sa {Format of the QDataStream Operators}
|
|
1276 |
*/
|
|
1277 |
|
|
1278 |
QDataStream &operator<<(QDataStream &s, const QRect &r)
|
|
1279 |
{
|
|
1280 |
if (s.version() == 1)
|
|
1281 |
s << (qint16)r.left() << (qint16)r.top()
|
|
1282 |
<< (qint16)r.right() << (qint16)r.bottom();
|
|
1283 |
else
|
|
1284 |
s << (qint32)r.left() << (qint32)r.top()
|
|
1285 |
<< (qint32)r.right() << (qint32)r.bottom();
|
|
1286 |
return s;
|
|
1287 |
}
|
|
1288 |
|
|
1289 |
/*!
|
|
1290 |
\fn QDataStream &operator>>(QDataStream &stream, QRect &rectangle)
|
|
1291 |
\relates QRect
|
|
1292 |
|
|
1293 |
Reads a rectangle from the given \a stream into the given \a
|
|
1294 |
rectangle, and returns a reference to the stream.
|
|
1295 |
|
|
1296 |
\sa {Format of the QDataStream Operators}
|
|
1297 |
*/
|
|
1298 |
|
|
1299 |
QDataStream &operator>>(QDataStream &s, QRect &r)
|
|
1300 |
{
|
|
1301 |
if (s.version() == 1) {
|
|
1302 |
qint16 x1, y1, x2, y2;
|
|
1303 |
s >> x1; s >> y1; s >> x2; s >> y2;
|
|
1304 |
r.setCoords(x1, y1, x2, y2);
|
|
1305 |
}
|
|
1306 |
else {
|
|
1307 |
qint32 x1, y1, x2, y2;
|
|
1308 |
s >> x1; s >> y1; s >> x2; s >> y2;
|
|
1309 |
r.setCoords(x1, y1, x2, y2);
|
|
1310 |
}
|
|
1311 |
return s;
|
|
1312 |
}
|
|
1313 |
|
|
1314 |
#endif // QT_NO_DATASTREAM
|
|
1315 |
|
|
1316 |
|
|
1317 |
#ifndef QT_NO_DEBUG_STREAM
|
|
1318 |
QDebug operator<<(QDebug dbg, const QRect &r) {
|
|
1319 |
dbg.nospace() << "QRect(" << r.x() << ',' << r.y() << ' '
|
|
1320 |
<< r.width() << 'x' << r.height() << ')';
|
|
1321 |
return dbg.space();
|
|
1322 |
}
|
|
1323 |
#endif
|
|
1324 |
|
|
1325 |
/*!
|
|
1326 |
\class QRectF
|
|
1327 |
\ingroup painting
|
|
1328 |
|
|
1329 |
\brief The QRectF class defines a rectangle in the plane using floating
|
|
1330 |
point precision.
|
|
1331 |
|
|
1332 |
A rectangle is normally expressed as an upper-left corner and a
|
|
1333 |
size. The size (width and height) of a QRectF is always equivalent
|
|
1334 |
to the mathematical rectangle that forms the basis for its
|
|
1335 |
rendering.
|
|
1336 |
|
|
1337 |
A QRectF can be constructed with a set of left, top, width and
|
|
1338 |
height integers, or from a QPoint and a QSize. The following code
|
|
1339 |
creates two identical rectangles.
|
|
1340 |
|
|
1341 |
\snippet doc/src/snippets/code/src_corelib_tools_qrect.cpp 1
|
|
1342 |
|
|
1343 |
There is also a third constructor creating a QRectF from a QRect,
|
|
1344 |
and a corresponding toRect() function that returns a QRect object
|
|
1345 |
based on the values of this rectangle (note that the coordinates
|
|
1346 |
in the returned rectangle are rounded to the nearest integer).
|
|
1347 |
|
|
1348 |
The QRectF class provides a collection of functions that return
|
|
1349 |
the various rectangle coordinates, and enable manipulation of
|
|
1350 |
these. QRectF also provide functions to move the rectangle
|
|
1351 |
relative to the various coordinates. In addition there is a
|
|
1352 |
moveTo() function that moves the rectangle, leaving its top left
|
|
1353 |
corner at the given coordinates. Alternatively, the translate()
|
|
1354 |
function moves the rectangle the given offset relative to the
|
|
1355 |
current position, and the translated() function returns a
|
|
1356 |
translated copy of this rectangle.
|
|
1357 |
|
|
1358 |
The size() function returns the rectange's dimensions as a
|
|
1359 |
QSize. The dimensions can also be retrieved separately using the
|
|
1360 |
width() and height() functions. To manipulate the dimensions use
|
|
1361 |
the setSize(), setWidth() or setHeight() functions. Alternatively,
|
|
1362 |
the size can be changed by applying either of the functions
|
|
1363 |
setting the rectangle coordinates, for example, setBottom() or
|
|
1364 |
setRight().
|
|
1365 |
|
|
1366 |
The contains() function tells whether a given point is inside the
|
|
1367 |
rectangle or not, and the intersects() function returns true if
|
|
1368 |
this rectangle intersects with a given rectangle (otherwise
|
|
1369 |
false). The QRectF class also provides the intersected() function
|
|
1370 |
which returns the intersection rectangle, and the united() function
|
|
1371 |
which returns the rectangle that encloses the given rectangle and
|
|
1372 |
this:
|
|
1373 |
|
|
1374 |
\table
|
|
1375 |
\row
|
|
1376 |
\o \inlineimage qrect-intersect.png
|
|
1377 |
\o \inlineimage qrect-unite.png
|
|
1378 |
\row
|
|
1379 |
\o intersected()
|
|
1380 |
\o united()
|
|
1381 |
\endtable
|
|
1382 |
|
|
1383 |
The isEmpty() function returns true if the rectangle's width or
|
|
1384 |
height is less than, or equal to, 0. Note that an empty rectangle
|
|
1385 |
is not valid: The isValid() function returns true if both width
|
|
1386 |
and height is larger than 0. A null rectangle (isNull() == true)
|
|
1387 |
on the other hand, has both width and height set to 0.
|
|
1388 |
|
|
1389 |
Note that due to the way QRect and QRectF are defined, an
|
|
1390 |
empty QRectF is defined in essentially the same way as QRect.
|
|
1391 |
|
|
1392 |
Finally, QRectF objects can be streamed as well as compared.
|
|
1393 |
|
|
1394 |
\tableofcontents
|
|
1395 |
|
|
1396 |
\section1 Rendering
|
|
1397 |
|
|
1398 |
When using an \l {QPainter::Antialiasing}{anti-aliased} painter,
|
|
1399 |
the boundary line of a QRectF will be rendered symmetrically on both
|
|
1400 |
sides of the mathematical rectangle's boundary line. But when
|
|
1401 |
using an aliased painter (the default) other rules apply.
|
|
1402 |
|
|
1403 |
Then, when rendering with a one pixel wide pen the QRectF's boundary
|
|
1404 |
line will be rendered to the right and below the mathematical
|
|
1405 |
rectangle's boundary line.
|
|
1406 |
|
|
1407 |
When rendering with a two pixels wide pen the boundary line will
|
|
1408 |
be split in the middle by the mathematical rectangle. This will be
|
|
1409 |
the case whenever the pen is set to an even number of pixels,
|
|
1410 |
while rendering with a pen with an odd number of pixels, the spare
|
|
1411 |
pixel will be rendered to the right and below the mathematical
|
|
1412 |
rectangle as in the one pixel case.
|
|
1413 |
|
|
1414 |
\table
|
|
1415 |
\row
|
|
1416 |
\o \inlineimage qrect-diagram-zero.png
|
|
1417 |
\o \inlineimage qrectf-diagram-one.png
|
|
1418 |
\row
|
|
1419 |
\o Logical representation
|
|
1420 |
\o One pixel wide pen
|
|
1421 |
\row
|
|
1422 |
\o \inlineimage qrectf-diagram-two.png
|
|
1423 |
\o \inlineimage qrectf-diagram-three.png
|
|
1424 |
\row
|
|
1425 |
\o Two pixel wide pen
|
|
1426 |
\o Three pixel wide pen
|
|
1427 |
\endtable
|
|
1428 |
|
|
1429 |
\section1 Coordinates
|
|
1430 |
|
|
1431 |
The QRectF class provides a collection of functions that return
|
|
1432 |
the various rectangle coordinates, and enable manipulation of
|
|
1433 |
these. QRectF also provide functions to move the rectangle
|
|
1434 |
relative to the various coordinates.
|
|
1435 |
|
|
1436 |
For example: the bottom(), setBottom() and moveBottom() functions:
|
|
1437 |
bottom() returns the y-coordinate of the rectangle's bottom edge,
|
|
1438 |
setBottom() sets the bottom edge of the rectangle to the given y
|
|
1439 |
coordinate (it may change the height, but will never change the
|
|
1440 |
rectangle's top edge) and moveBottom() moves the entire rectangle
|
|
1441 |
vertically, leaving the rectangle's bottom edge at the given y
|
|
1442 |
coordinate and its size unchanged.
|
|
1443 |
|
|
1444 |
\image qrectf-coordinates.png
|
|
1445 |
|
|
1446 |
It is also possible to add offsets to this rectangle's coordinates
|
|
1447 |
using the adjust() function, as well as retrieve a new rectangle
|
|
1448 |
based on adjustments of the original one using the adjusted()
|
|
1449 |
function. If either of the width and height is negative, use the
|
|
1450 |
normalized() function to retrieve a rectangle where the corners
|
|
1451 |
are swapped.
|
|
1452 |
|
|
1453 |
In addition, QRectF provides the getCoords() function which extracts
|
|
1454 |
the position of the rectangle's top-left and bottom-right corner,
|
|
1455 |
and the getRect() function which extracts the rectangle's top-left
|
|
1456 |
corner, width and height. Use the setCoords() and setRect()
|
|
1457 |
function to manipulate the rectangle's coordinates and dimensions
|
|
1458 |
in one go.
|
|
1459 |
|
|
1460 |
\sa QRect, QRegion
|
|
1461 |
*/
|
|
1462 |
|
|
1463 |
/*****************************************************************************
|
|
1464 |
QRectF member functions
|
|
1465 |
*****************************************************************************/
|
|
1466 |
|
|
1467 |
/*!
|
|
1468 |
\fn QRectF::QRectF()
|
|
1469 |
|
|
1470 |
Constructs a null rectangle.
|
|
1471 |
|
|
1472 |
\sa isNull()
|
|
1473 |
*/
|
|
1474 |
|
|
1475 |
/*!
|
|
1476 |
\fn QRectF::QRectF(const QPointF &topLeft, const QSizeF &size)
|
|
1477 |
|
|
1478 |
Constructs a rectangle with the given \a topLeft corner and the given \a size.
|
|
1479 |
|
|
1480 |
\sa setTopLeft(), setSize()
|
|
1481 |
*/
|
|
1482 |
|
|
1483 |
/*!
|
|
1484 |
\fn QRectF::QRectF(const QPointF &topLeft, const QPointF &bottomRight)
|
|
1485 |
\since 4.3
|
|
1486 |
|
|
1487 |
Constructs a rectangle with the given \a topLeft and \a bottomRight corners.
|
|
1488 |
|
|
1489 |
\sa setTopLeft(), setBottomRight()
|
|
1490 |
*/
|
|
1491 |
|
|
1492 |
/*!
|
|
1493 |
\fn QRectF::QRectF(qreal x, qreal y, qreal width, qreal height)
|
|
1494 |
|
|
1495 |
Constructs a rectangle with (\a x, \a y) as its top-left corner
|
|
1496 |
and the given \a width and \a height.
|
|
1497 |
|
|
1498 |
\sa setRect()
|
|
1499 |
*/
|
|
1500 |
|
|
1501 |
/*!
|
|
1502 |
\fn QRectF::QRectF(const QRect &rectangle)
|
|
1503 |
|
|
1504 |
Constructs a QRectF rectangle from the given QRect \a rectangle.
|
|
1505 |
|
|
1506 |
\sa toRect()
|
|
1507 |
*/
|
|
1508 |
|
|
1509 |
/*!
|
|
1510 |
\fn bool QRectF::isNull() const
|
|
1511 |
|
|
1512 |
Returns true if the rectangle is a null rectangle, otherwise returns false.
|
|
1513 |
|
|
1514 |
A null rectangle has both the width and the height set to 0. A
|
|
1515 |
null rectangle is also empty, and hence not valid.
|
|
1516 |
|
|
1517 |
\sa isEmpty(), isValid()
|
|
1518 |
*/
|
|
1519 |
|
|
1520 |
/*!
|
|
1521 |
\fn bool QRectF::isEmpty() const
|
|
1522 |
|
|
1523 |
Returns true if the rectangle is empty, otherwise returns false.
|
|
1524 |
|
|
1525 |
An empty rectangle has width() <= 0 or height() <= 0. An empty
|
|
1526 |
rectangle is not valid (i.e., isEmpty() == !isValid()).
|
|
1527 |
|
|
1528 |
Use the normalized() function to retrieve a rectangle where the
|
|
1529 |
corners are swapped.
|
|
1530 |
|
|
1531 |
\sa isNull(), isValid(), normalized()
|
|
1532 |
*/
|
|
1533 |
|
|
1534 |
/*!
|
|
1535 |
\fn bool QRectF::isValid() const
|
|
1536 |
|
|
1537 |
Returns true if the rectangle is valid, otherwise returns false.
|
|
1538 |
|
|
1539 |
A valid rectangle has a width() > 0 and height() > 0. Note that
|
|
1540 |
non-trivial operations like intersections are not defined for
|
|
1541 |
invalid rectangles. A valid rectangle is not empty (i.e., isValid()
|
|
1542 |
== !isEmpty()).
|
|
1543 |
|
|
1544 |
\sa isNull(), isEmpty(), normalized()
|
|
1545 |
*/
|
|
1546 |
|
|
1547 |
|
|
1548 |
/*!
|
|
1549 |
Returns a normalized rectangle; i.e., a rectangle that has a
|
|
1550 |
non-negative width and height.
|
|
1551 |
|
|
1552 |
If width() < 0 the function swaps the left and right corners, and
|
|
1553 |
it swaps the top and bottom corners if height() < 0.
|
|
1554 |
|
|
1555 |
\sa isValid(), isEmpty()
|
|
1556 |
*/
|
|
1557 |
|
|
1558 |
QRectF QRectF::normalized() const
|
|
1559 |
{
|
|
1560 |
QRectF r = *this;
|
|
1561 |
if (r.w < 0) {
|
|
1562 |
r.xp += r.w;
|
|
1563 |
r.w = -r.w;
|
|
1564 |
}
|
|
1565 |
if (r.h < 0) {
|
|
1566 |
r.yp += r.h;
|
|
1567 |
r.h = -r.h;
|
|
1568 |
}
|
|
1569 |
return r;
|
|
1570 |
}
|
|
1571 |
|
|
1572 |
/*!
|
|
1573 |
\fn qreal QRectF::x() const
|
|
1574 |
|
|
1575 |
Returns the x-coordinate of the rectangle's left edge. Equivalent
|
|
1576 |
to left().
|
|
1577 |
|
|
1578 |
|
|
1579 |
\sa setX(), y(), topLeft()
|
|
1580 |
*/
|
|
1581 |
|
|
1582 |
/*!
|
|
1583 |
\fn qreal QRectF::y() const
|
|
1584 |
|
|
1585 |
Returns the y-coordinate of the rectangle's top edge. Equivalent
|
|
1586 |
to top().
|
|
1587 |
|
|
1588 |
\sa setY(), x(), topLeft()
|
|
1589 |
*/
|
|
1590 |
|
|
1591 |
|
|
1592 |
/*!
|
|
1593 |
\fn void QRectF::setLeft(qreal x)
|
|
1594 |
|
|
1595 |
Sets the left edge of the rectangle to the given \a x
|
|
1596 |
coordinate. May change the width, but will never change the right
|
|
1597 |
edge of the rectangle.
|
|
1598 |
|
|
1599 |
Equivalent to setX().
|
|
1600 |
|
|
1601 |
\sa left(), moveLeft()
|
|
1602 |
*/
|
|
1603 |
|
|
1604 |
/*!
|
|
1605 |
\fn void QRectF::setTop(qreal y)
|
|
1606 |
|
|
1607 |
Sets the top edge of the rectangle to the given \a y coordinate. May
|
|
1608 |
change the height, but will never change the bottom edge of the
|
|
1609 |
rectangle.
|
|
1610 |
|
|
1611 |
Equivalent to setY().
|
|
1612 |
|
|
1613 |
\sa top(), moveTop()
|
|
1614 |
*/
|
|
1615 |
|
|
1616 |
/*!
|
|
1617 |
\fn void QRectF::setRight(qreal x)
|
|
1618 |
|
|
1619 |
Sets the right edge of the rectangle to the given \a x
|
|
1620 |
coordinate. May change the width, but will never change the left
|
|
1621 |
edge of the rectangle.
|
|
1622 |
|
|
1623 |
\sa right(), moveRight()
|
|
1624 |
*/
|
|
1625 |
|
|
1626 |
/*!
|
|
1627 |
\fn void QRectF::setBottom(qreal y)
|
|
1628 |
|
|
1629 |
Sets the bottom edge of the rectangle to the given \a y
|
|
1630 |
coordinate. May change the height, but will never change the top
|
|
1631 |
edge of the rectangle.
|
|
1632 |
|
|
1633 |
\sa bottom(), moveBottom()
|
|
1634 |
*/
|
|
1635 |
|
|
1636 |
/*!
|
|
1637 |
\fn void QRectF::setX(qreal x)
|
|
1638 |
|
|
1639 |
Sets the left edge of the rectangle to the given \a x
|
|
1640 |
coordinate. May change the width, but will never change the right
|
|
1641 |
edge of the rectangle.
|
|
1642 |
|
|
1643 |
Equivalent to setLeft().
|
|
1644 |
|
|
1645 |
\sa x(), setY(), setTopLeft()
|
|
1646 |
*/
|
|
1647 |
|
|
1648 |
/*!
|
|
1649 |
\fn void QRectF::setY(qreal y)
|
|
1650 |
|
|
1651 |
Sets the top edge of the rectangle to the given \a y
|
|
1652 |
coordinate. May change the height, but will never change the
|
|
1653 |
bottom edge of the rectangle.
|
|
1654 |
|
|
1655 |
Equivalent to setTop().
|
|
1656 |
|
|
1657 |
\sa y(), setX(), setTopLeft()
|
|
1658 |
*/
|
|
1659 |
|
|
1660 |
/*!
|
|
1661 |
\fn void QRectF::setTopLeft(const QPointF &position)
|
|
1662 |
|
|
1663 |
Set the top-left corner of the rectangle to the given \a
|
|
1664 |
position. May change the size, but will never change the
|
|
1665 |
bottom-right corner of the rectangle.
|
|
1666 |
|
|
1667 |
\sa topLeft(), moveTopLeft()
|
|
1668 |
*/
|
|
1669 |
|
|
1670 |
/*!
|
|
1671 |
\fn void QRectF::setBottomRight(const QPointF &position)
|
|
1672 |
|
|
1673 |
Set the bottom-right corner of the rectangle to the given \a
|
|
1674 |
position. May change the size, but will never change the
|
|
1675 |
top-left corner of the rectangle.
|
|
1676 |
|
|
1677 |
\sa bottomRight(), moveBottomRight()
|
|
1678 |
*/
|
|
1679 |
|
|
1680 |
/*!
|
|
1681 |
\fn void QRectF::setTopRight(const QPointF &position)
|
|
1682 |
|
|
1683 |
Set the top-right corner of the rectangle to the given \a
|
|
1684 |
position. May change the size, but will never change the
|
|
1685 |
bottom-left corner of the rectangle.
|
|
1686 |
|
|
1687 |
\sa topRight(), moveTopRight()
|
|
1688 |
*/
|
|
1689 |
|
|
1690 |
/*!
|
|
1691 |
\fn void QRectF::setBottomLeft(const QPointF &position)
|
|
1692 |
|
|
1693 |
Set the bottom-left corner of the rectangle to the given \a
|
|
1694 |
position. May change the size, but will never change the
|
|
1695 |
top-right corner of the rectangle.
|
|
1696 |
|
|
1697 |
\sa bottomLeft(), moveBottomLeft()
|
|
1698 |
*/
|
|
1699 |
|
|
1700 |
/*!
|
|
1701 |
\fn QPointF QRectF::center() const
|
|
1702 |
|
|
1703 |
Returns the center point of the rectangle.
|
|
1704 |
|
|
1705 |
\sa moveCenter()
|
|
1706 |
*/
|
|
1707 |
|
|
1708 |
|
|
1709 |
/*!
|
|
1710 |
\fn void QRectF::getRect(qreal *x, qreal *y, qreal *width, qreal *height) const
|
|
1711 |
|
|
1712 |
Extracts the position of the rectangle's top-left corner to *\a x and
|
|
1713 |
*\a y, and its dimensions to *\a width and *\a height.
|
|
1714 |
|
|
1715 |
\sa setRect(), getCoords()
|
|
1716 |
*/
|
|
1717 |
|
|
1718 |
|
|
1719 |
/*!
|
|
1720 |
\fn void QRectF::getCoords(qreal *x1, qreal *y1, qreal *x2, qreal *y2) const
|
|
1721 |
|
|
1722 |
Extracts the position of the rectangle's top-left corner to *\a x1
|
|
1723 |
and *\a y1, and the position of the bottom-right corner to *\a x2 and
|
|
1724 |
*\a y2.
|
|
1725 |
|
|
1726 |
\sa setCoords(), getRect()
|
|
1727 |
*/
|
|
1728 |
|
|
1729 |
/*!
|
|
1730 |
\fn void QRectF::moveLeft(qreal x)
|
|
1731 |
|
|
1732 |
Moves the rectangle horizontally, leaving the rectangle's left
|
|
1733 |
edge at the given \a x coordinate. The rectangle's size is
|
|
1734 |
unchanged.
|
|
1735 |
|
|
1736 |
\sa left(), setLeft(), moveRight()
|
|
1737 |
*/
|
|
1738 |
|
|
1739 |
/*!
|
|
1740 |
\fn void QRectF::moveTop(qreal y)
|
|
1741 |
|
|
1742 |
Moves the rectangle vertically, leaving the rectangle's top line
|
|
1743 |
at the given \a y coordinate. The rectangle's size is unchanged.
|
|
1744 |
|
|
1745 |
\sa top(), setTop(), moveBottom()
|
|
1746 |
*/
|
|
1747 |
|
|
1748 |
|
|
1749 |
/*!
|
|
1750 |
\fn void QRectF::moveRight(qreal x)
|
|
1751 |
|
|
1752 |
Moves the rectangle horizontally, leaving the rectangle's right
|
|
1753 |
edge at the given \a x coordinate. The rectangle's size is
|
|
1754 |
unchanged.
|
|
1755 |
|
|
1756 |
\sa right(), setRight(), moveLeft()
|
|
1757 |
*/
|
|
1758 |
|
|
1759 |
|
|
1760 |
/*!
|
|
1761 |
\fn void QRectF::moveBottom(qreal y)
|
|
1762 |
|
|
1763 |
Moves the rectangle vertically, leaving the rectangle's bottom
|
|
1764 |
edge at the given \a y coordinate. The rectangle's size is
|
|
1765 |
unchanged.
|
|
1766 |
|
|
1767 |
\sa bottom(), setBottom(), moveTop()
|
|
1768 |
*/
|
|
1769 |
|
|
1770 |
|
|
1771 |
/*!
|
|
1772 |
\fn void QRectF::moveTopLeft(const QPointF &position)
|
|
1773 |
|
|
1774 |
Moves the rectangle, leaving the top-left corner at the given \a
|
|
1775 |
position. The rectangle's size is unchanged.
|
|
1776 |
|
|
1777 |
\sa setTopLeft(), moveTop(), moveLeft()
|
|
1778 |
*/
|
|
1779 |
|
|
1780 |
|
|
1781 |
/*!
|
|
1782 |
\fn void QRectF::moveBottomRight(const QPointF &position)
|
|
1783 |
|
|
1784 |
Moves the rectangle, leaving the bottom-right corner at the given
|
|
1785 |
\a position. The rectangle's size is unchanged.
|
|
1786 |
|
|
1787 |
\sa setBottomRight(), moveBottom(), moveRight()
|
|
1788 |
*/
|
|
1789 |
|
|
1790 |
|
|
1791 |
/*!
|
|
1792 |
\fn void QRectF::moveTopRight(const QPointF &position)
|
|
1793 |
|
|
1794 |
Moves the rectangle, leaving the top-right corner at the given
|
|
1795 |
\a position. The rectangle's size is unchanged.
|
|
1796 |
|
|
1797 |
\sa setTopRight(), moveTop(), moveRight()
|
|
1798 |
*/
|
|
1799 |
|
|
1800 |
|
|
1801 |
/*!
|
|
1802 |
\fn void QRectF::moveBottomLeft(const QPointF &position)
|
|
1803 |
|
|
1804 |
Moves the rectangle, leaving the bottom-left corner at the given
|
|
1805 |
\a position. The rectangle's size is unchanged.
|
|
1806 |
|
|
1807 |
\sa setBottomLeft(), moveBottom(), moveLeft()
|
|
1808 |
*/
|
|
1809 |
|
|
1810 |
|
|
1811 |
/*!
|
|
1812 |
\fn void QRectF::moveTo(qreal x, qreal y)
|
|
1813 |
|
|
1814 |
Moves the rectangle, leaving the top-left corner at the given
|
|
1815 |
position (\a x, \a y). The rectangle's size is unchanged.
|
|
1816 |
|
|
1817 |
\sa translate(), moveTopLeft()
|
|
1818 |
*/
|
|
1819 |
|
|
1820 |
/*!
|
|
1821 |
\fn void QRectF::moveTo(const QPointF &position)
|
|
1822 |
\overload
|
|
1823 |
|
|
1824 |
Moves the rectangle, leaving the top-left corner at the given \a
|
|
1825 |
position.
|
|
1826 |
*/
|
|
1827 |
|
|
1828 |
/*!
|
|
1829 |
\fn void QRectF::translate(qreal dx, qreal dy)
|
|
1830 |
|
|
1831 |
Moves the rectangle \a dx along the x-axis and \a dy along the y-axis,
|
|
1832 |
relative to the current position. Positive values move the rectangle to the
|
|
1833 |
right and downwards.
|
|
1834 |
|
|
1835 |
\sa moveTopLeft(), moveTo(), translated()
|
|
1836 |
*/
|
|
1837 |
|
|
1838 |
|
|
1839 |
/*!
|
|
1840 |
\fn void QRectF::translate(const QPointF &offset)
|
|
1841 |
\overload
|
|
1842 |
|
|
1843 |
Moves the rectangle \a{offset}.\l{QPointF::x()}{x()} along the x
|
|
1844 |
axis and \a{offset}.\l{QPointF::y()}{y()} along the y axis,
|
|
1845 |
relative to the current position.
|
|
1846 |
*/
|
|
1847 |
|
|
1848 |
|
|
1849 |
/*!
|
|
1850 |
\fn QRectF QRectF::translated(qreal dx, qreal dy) const
|
|
1851 |
|
|
1852 |
Returns a copy of the rectangle that is translated \a dx along the
|
|
1853 |
x axis and \a dy along the y axis, relative to the current
|
|
1854 |
position. Positive values move the rectangle to the right and
|
|
1855 |
down.
|
|
1856 |
|
|
1857 |
\sa translate()
|
|
1858 |
*/
|
|
1859 |
|
|
1860 |
|
|
1861 |
/*!
|
|
1862 |
\fn QRectF QRectF::translated(const QPointF &offset) const
|
|
1863 |
\overload
|
|
1864 |
|
|
1865 |
Returns a copy of the rectangle that is translated
|
|
1866 |
\a{offset}.\l{QPointF::x()}{x()} along the x axis and
|
|
1867 |
\a{offset}.\l{QPointF::y()}{y()} along the y axis, relative to the
|
|
1868 |
current position.
|
|
1869 |
*/
|
|
1870 |
|
|
1871 |
|
|
1872 |
/*!
|
|
1873 |
\fn void QRectF::setRect(qreal x, qreal y, qreal width, qreal height)
|
|
1874 |
|
|
1875 |
Sets the coordinates of the rectangle's top-left corner to (\a x,
|
|
1876 |
\a y), and its size to the given \a width and \a height.
|
|
1877 |
|
|
1878 |
\sa getRect(), setCoords()
|
|
1879 |
*/
|
|
1880 |
|
|
1881 |
|
|
1882 |
/*!
|
|
1883 |
\fn void QRectF::setCoords(qreal x1, qreal y1, qreal x2, qreal y2)
|
|
1884 |
|
|
1885 |
Sets the coordinates of the rectangle's top-left corner to (\a x1,
|
|
1886 |
\a y1), and the coordinates of its bottom-right corner to (\a x2,
|
|
1887 |
\a y2).
|
|
1888 |
|
|
1889 |
\sa getCoords() setRect()
|
|
1890 |
*/
|
|
1891 |
|
|
1892 |
/*!
|
|
1893 |
\fn QRectF QRectF::adjusted(qreal dx1, qreal dy1, qreal dx2, qreal dy2) const
|
|
1894 |
|
|
1895 |
Returns a new rectangle with \a dx1, \a dy1, \a dx2 and \a dy2
|
|
1896 |
added respectively to the existing coordinates of this rectangle.
|
|
1897 |
|
|
1898 |
\sa adjust()
|
|
1899 |
*/
|
|
1900 |
|
|
1901 |
/*! \fn void QRectF::adjust(qreal dx1, qreal dy1, qreal dx2, qreal dy2)
|
|
1902 |
|
|
1903 |
Adds \a dx1, \a dy1, \a dx2 and \a dy2 respectively to the
|
|
1904 |
existing coordinates of the rectangle.
|
|
1905 |
|
|
1906 |
\sa adjusted(), setRect()
|
|
1907 |
*/
|
|
1908 |
/*!
|
|
1909 |
\fn QSizeF QRectF::size() const
|
|
1910 |
|
|
1911 |
Returns the size of the rectangle.
|
|
1912 |
|
|
1913 |
\sa setSize(), width(), height()
|
|
1914 |
*/
|
|
1915 |
|
|
1916 |
/*!
|
|
1917 |
\fn qreal QRectF::width() const
|
|
1918 |
|
|
1919 |
Returns the width of the rectangle.
|
|
1920 |
|
|
1921 |
\sa setWidth(), height(), size()
|
|
1922 |
*/
|
|
1923 |
|
|
1924 |
/*!
|
|
1925 |
\fn qreal QRectF::height() const
|
|
1926 |
|
|
1927 |
Returns the height of the rectangle.
|
|
1928 |
|
|
1929 |
\sa setHeight(), width(), size()
|
|
1930 |
*/
|
|
1931 |
|
|
1932 |
/*!
|
|
1933 |
\fn void QRectF::setWidth(qreal width)
|
|
1934 |
|
|
1935 |
Sets the width of the rectangle to the given \a width. The right
|
|
1936 |
edge is changed, but not the left one.
|
|
1937 |
|
|
1938 |
\sa width(), setSize()
|
|
1939 |
*/
|
|
1940 |
|
|
1941 |
|
|
1942 |
/*!
|
|
1943 |
\fn void QRectF::setHeight(qreal height)
|
|
1944 |
|
|
1945 |
Sets the height of the rectangle to the given \a height. The bottom
|
|
1946 |
edge is changed, but not the top one.
|
|
1947 |
|
|
1948 |
\sa height(), setSize()
|
|
1949 |
*/
|
|
1950 |
|
|
1951 |
|
|
1952 |
/*!
|
|
1953 |
\fn void QRectF::setSize(const QSizeF &size)
|
|
1954 |
|
|
1955 |
Sets the size of the rectangle to the given \a size. The top-left
|
|
1956 |
corner is not moved.
|
|
1957 |
|
|
1958 |
\sa size(), setWidth(), setHeight()
|
|
1959 |
*/
|
|
1960 |
|
|
1961 |
|
|
1962 |
/*!
|
|
1963 |
\fn bool QRectF::contains(const QPointF &point) const
|
|
1964 |
|
|
1965 |
Returns true if the given \a point is inside or on the edge of the
|
|
1966 |
rectangle; otherwise returns false.
|
|
1967 |
|
|
1968 |
\sa intersects()
|
|
1969 |
*/
|
|
1970 |
|
|
1971 |
bool QRectF::contains(const QPointF &p) const
|
|
1972 |
{
|
|
1973 |
qreal l = xp;
|
|
1974 |
qreal r = xp;
|
|
1975 |
if (w < 0)
|
|
1976 |
l += w;
|
|
1977 |
else
|
|
1978 |
r += w;
|
|
1979 |
if (l == r) // null rect
|
|
1980 |
return false;
|
|
1981 |
|
|
1982 |
if (p.x() < l || p.x() > r)
|
|
1983 |
return false;
|
|
1984 |
|
|
1985 |
qreal t = yp;
|
|
1986 |
qreal b = yp;
|
|
1987 |
if (h < 0)
|
|
1988 |
t += h;
|
|
1989 |
else
|
|
1990 |
b += h;
|
|
1991 |
if (t == b) // null rect
|
|
1992 |
return false;
|
|
1993 |
|
|
1994 |
if (p.y() < t || p.y() > b)
|
|
1995 |
return false;
|
|
1996 |
|
|
1997 |
return true;
|
|
1998 |
}
|
|
1999 |
|
|
2000 |
|
|
2001 |
/*!
|
|
2002 |
\fn bool QRectF::contains(qreal x, qreal y) const
|
|
2003 |
\overload
|
|
2004 |
|
|
2005 |
Returns true if the point (\a x, \a y) is inside or on the edge of
|
|
2006 |
the rectangle; otherwise returns false.
|
|
2007 |
*/
|
|
2008 |
|
|
2009 |
/*!
|
|
2010 |
\fn bool QRectF::contains(const QRectF &rectangle) const
|
|
2011 |
\overload
|
|
2012 |
|
|
2013 |
Returns true if the given \a rectangle is inside this rectangle;
|
|
2014 |
otherwise returns false.
|
|
2015 |
*/
|
|
2016 |
|
|
2017 |
bool QRectF::contains(const QRectF &r) const
|
|
2018 |
{
|
|
2019 |
qreal l1 = xp;
|
|
2020 |
qreal r1 = xp;
|
|
2021 |
if (w < 0)
|
|
2022 |
l1 += w;
|
|
2023 |
else
|
|
2024 |
r1 += w;
|
|
2025 |
if (l1 == r1) // null rect
|
|
2026 |
return false;
|
|
2027 |
|
|
2028 |
qreal l2 = r.xp;
|
|
2029 |
qreal r2 = r.xp;
|
|
2030 |
if (r.w < 0)
|
|
2031 |
l2 += r.w;
|
|
2032 |
else
|
|
2033 |
r2 += r.w;
|
|
2034 |
if (l2 == r2) // null rect
|
|
2035 |
return false;
|
|
2036 |
|
|
2037 |
if (l2 < l1 || r2 > r1)
|
|
2038 |
return false;
|
|
2039 |
|
|
2040 |
qreal t1 = yp;
|
|
2041 |
qreal b1 = yp;
|
|
2042 |
if (h < 0)
|
|
2043 |
t1 += h;
|
|
2044 |
else
|
|
2045 |
b1 += h;
|
|
2046 |
if (t1 == b1) // null rect
|
|
2047 |
return false;
|
|
2048 |
|
|
2049 |
qreal t2 = r.yp;
|
|
2050 |
qreal b2 = r.yp;
|
|
2051 |
if (r.h < 0)
|
|
2052 |
t2 += r.h;
|
|
2053 |
else
|
|
2054 |
b2 += r.h;
|
|
2055 |
if (t2 == b2) // null rect
|
|
2056 |
return false;
|
|
2057 |
|
|
2058 |
if (t2 < t1 || b2 > b1)
|
|
2059 |
return false;
|
|
2060 |
|
|
2061 |
return true;
|
|
2062 |
}
|
|
2063 |
|
|
2064 |
/*!
|
|
2065 |
\fn qreal QRectF::left() const
|
|
2066 |
|
|
2067 |
Returns the x-coordinate of the rectangle's left edge. Equivalent
|
|
2068 |
to x().
|
|
2069 |
|
|
2070 |
\sa setLeft(), topLeft(), bottomLeft()
|
|
2071 |
*/
|
|
2072 |
|
|
2073 |
/*!
|
|
2074 |
\fn qreal QRectF::top() const
|
|
2075 |
|
|
2076 |
Returns the y-coordinate of the rectangle's top edge. Equivalent
|
|
2077 |
to y().
|
|
2078 |
|
|
2079 |
\sa setTop(), topLeft(), topRight()
|
|
2080 |
*/
|
|
2081 |
|
|
2082 |
/*!
|
|
2083 |
\fn qreal QRectF::right() const
|
|
2084 |
|
|
2085 |
Returns the x-coordinate of the rectangle's right edge.
|
|
2086 |
|
|
2087 |
\sa setRight(), topRight(), bottomRight()
|
|
2088 |
*/
|
|
2089 |
|
|
2090 |
/*!
|
|
2091 |
\fn qreal QRectF::bottom() const
|
|
2092 |
|
|
2093 |
Returns the y-coordinate of the rectangle's bottom edge.
|
|
2094 |
|
|
2095 |
\sa setBottom(), bottomLeft(), bottomRight()
|
|
2096 |
*/
|
|
2097 |
|
|
2098 |
/*!
|
|
2099 |
\fn QPointF QRectF::topLeft() const
|
|
2100 |
|
|
2101 |
Returns the position of the rectangle's top-left corner.
|
|
2102 |
|
|
2103 |
\sa setTopLeft(), top(), left()
|
|
2104 |
*/
|
|
2105 |
|
|
2106 |
/*!
|
|
2107 |
\fn QPointF QRectF::bottomRight() const
|
|
2108 |
|
|
2109 |
Returns the position of the rectangle's bottom-right corner.
|
|
2110 |
|
|
2111 |
\sa setBottomRight(), bottom(), right()
|
|
2112 |
*/
|
|
2113 |
|
|
2114 |
/*!
|
|
2115 |
\fn QPointF QRectF::topRight() const
|
|
2116 |
|
|
2117 |
Returns the position of the rectangle's top-right corner.
|
|
2118 |
|
|
2119 |
\sa setTopRight(), top(), right()
|
|
2120 |
*/
|
|
2121 |
|
|
2122 |
/*!
|
|
2123 |
\fn QPointF QRectF::bottomLeft() const
|
|
2124 |
|
|
2125 |
Returns the position of the rectangle's bottom-left corner.
|
|
2126 |
|
|
2127 |
\sa setBottomLeft(), bottom(), left()
|
|
2128 |
*/
|
|
2129 |
|
|
2130 |
/*!
|
|
2131 |
\fn QRectF& QRectF::operator|=(const QRectF &rectangle)
|
|
2132 |
|
|
2133 |
Unites this rectangle with the given \a rectangle.
|
|
2134 |
|
|
2135 |
\sa united(), operator|()
|
|
2136 |
*/
|
|
2137 |
|
|
2138 |
/*!
|
|
2139 |
\fn QRectF& QRectF::operator&=(const QRectF &rectangle)
|
|
2140 |
|
|
2141 |
Intersects this rectangle with the given \a rectangle.
|
|
2142 |
|
|
2143 |
\sa intersected(), operator|=()
|
|
2144 |
*/
|
|
2145 |
|
|
2146 |
|
|
2147 |
/*!
|
|
2148 |
\fn QRectF QRectF::operator|(const QRectF &rectangle) const
|
|
2149 |
|
|
2150 |
Returns the bounding rectangle of this rectangle and the given \a rectangle.
|
|
2151 |
|
|
2152 |
\sa united(), operator|=()
|
|
2153 |
*/
|
|
2154 |
|
|
2155 |
QRectF QRectF::operator|(const QRectF &r) const
|
|
2156 |
{
|
|
2157 |
if (isNull())
|
|
2158 |
return r;
|
|
2159 |
if (r.isNull())
|
|
2160 |
return *this;
|
|
2161 |
|
|
2162 |
qreal left = xp;
|
|
2163 |
qreal right = xp;
|
|
2164 |
if (w < 0)
|
|
2165 |
left += w;
|
|
2166 |
else
|
|
2167 |
right += w;
|
|
2168 |
|
|
2169 |
if (r.w < 0) {
|
|
2170 |
left = qMin(left, r.xp + r.w);
|
|
2171 |
right = qMax(right, r.xp);
|
|
2172 |
} else {
|
|
2173 |
left = qMin(left, r.xp);
|
|
2174 |
right = qMax(right, r.xp + r.w);
|
|
2175 |
}
|
|
2176 |
|
|
2177 |
qreal top = yp;
|
|
2178 |
qreal bottom = yp;
|
|
2179 |
if (h < 0)
|
|
2180 |
top += h;
|
|
2181 |
else
|
|
2182 |
bottom += h;
|
|
2183 |
|
|
2184 |
if (r.h < 0) {
|
|
2185 |
top = qMin(top, r.yp + r.h);
|
|
2186 |
bottom = qMax(bottom, r.yp);
|
|
2187 |
} else {
|
|
2188 |
top = qMin(top, r.yp);
|
|
2189 |
bottom = qMax(bottom, r.yp + r.h);
|
|
2190 |
}
|
|
2191 |
|
|
2192 |
return QRectF(left, top, right - left, bottom - top);
|
|
2193 |
}
|
|
2194 |
|
|
2195 |
/*!
|
|
2196 |
\fn QRectF QRectF::unite(const QRectF &rectangle) const
|
|
2197 |
\obsolete
|
|
2198 |
|
|
2199 |
Use united(\a rectangle) instead.
|
|
2200 |
*/
|
|
2201 |
|
|
2202 |
/*!
|
|
2203 |
\fn QRectF QRectF::united(const QRectF &rectangle) const
|
|
2204 |
\since 4.2
|
|
2205 |
|
|
2206 |
Returns the bounding rectangle of this rectangle and the given \a
|
|
2207 |
rectangle.
|
|
2208 |
|
|
2209 |
\image qrect-unite.png
|
|
2210 |
|
|
2211 |
\sa intersected()
|
|
2212 |
*/
|
|
2213 |
|
|
2214 |
|
|
2215 |
/*!
|
|
2216 |
\fn QRectF QRectF::operator &(const QRectF &rectangle) const
|
|
2217 |
|
|
2218 |
Returns the intersection of this rectangle and the given \a
|
|
2219 |
rectangle. Returns an empty rectangle if there is no intersection.
|
|
2220 |
|
|
2221 |
\sa operator&=(), intersected()
|
|
2222 |
*/
|
|
2223 |
|
|
2224 |
QRectF QRectF::operator&(const QRectF &r) const
|
|
2225 |
{
|
|
2226 |
qreal l1 = xp;
|
|
2227 |
qreal r1 = xp;
|
|
2228 |
if (w < 0)
|
|
2229 |
l1 += w;
|
|
2230 |
else
|
|
2231 |
r1 += w;
|
|
2232 |
if (l1 == r1) // null rect
|
|
2233 |
return QRectF();
|
|
2234 |
|
|
2235 |
qreal l2 = r.xp;
|
|
2236 |
qreal r2 = r.xp;
|
|
2237 |
if (r.w < 0)
|
|
2238 |
l2 += r.w;
|
|
2239 |
else
|
|
2240 |
r2 += r.w;
|
|
2241 |
if (l2 == r2) // null rect
|
|
2242 |
return QRectF();
|
|
2243 |
|
|
2244 |
if (l1 >= r2 || l2 >= r1)
|
|
2245 |
return QRectF();
|
|
2246 |
|
|
2247 |
qreal t1 = yp;
|
|
2248 |
qreal b1 = yp;
|
|
2249 |
if (h < 0)
|
|
2250 |
t1 += h;
|
|
2251 |
else
|
|
2252 |
b1 += h;
|
|
2253 |
if (t1 == b1) // null rect
|
|
2254 |
return QRectF();
|
|
2255 |
|
|
2256 |
qreal t2 = r.yp;
|
|
2257 |
qreal b2 = r.yp;
|
|
2258 |
if (r.h < 0)
|
|
2259 |
t2 += r.h;
|
|
2260 |
else
|
|
2261 |
b2 += r.h;
|
|
2262 |
if (t2 == b2) // null rect
|
|
2263 |
return QRectF();
|
|
2264 |
|
|
2265 |
if (t1 >= b2 || t2 >= b1)
|
|
2266 |
return QRectF();
|
|
2267 |
|
|
2268 |
QRectF tmp;
|
|
2269 |
tmp.xp = qMax(l1, l2);
|
|
2270 |
tmp.yp = qMax(t1, t2);
|
|
2271 |
tmp.w = qMin(r1, r2) - tmp.xp;
|
|
2272 |
tmp.h = qMin(b1, b2) - tmp.yp;
|
|
2273 |
return tmp;
|
|
2274 |
}
|
|
2275 |
|
|
2276 |
/*!
|
|
2277 |
\fn QRectF QRectF::intersect(const QRectF &rectangle) const
|
|
2278 |
\obsolete
|
|
2279 |
|
|
2280 |
Use intersected(\a rectangle) instead.
|
|
2281 |
*/
|
|
2282 |
|
|
2283 |
/*!
|
|
2284 |
\fn QRectF QRectF::intersected(const QRectF &rectangle) const
|
|
2285 |
\since 4.2
|
|
2286 |
|
|
2287 |
Returns the intersection of this rectangle and the given \a
|
|
2288 |
rectangle. Note that \c {r.intersected(s)} is equivalent to \c
|
|
2289 |
{r & s}.
|
|
2290 |
|
|
2291 |
\image qrect-intersect.png
|
|
2292 |
|
|
2293 |
\sa intersects(), united(), operator&=()
|
|
2294 |
*/
|
|
2295 |
|
|
2296 |
/*!
|
|
2297 |
\fn bool QRectF::intersects(const QRectF &rectangle) const
|
|
2298 |
|
|
2299 |
Returns true if this rectangle intersects with the given \a
|
|
2300 |
rectangle (i.e. there is a non-empty area of overlap between
|
|
2301 |
them), otherwise returns false.
|
|
2302 |
|
|
2303 |
The intersection rectangle can be retrieved using the intersected()
|
|
2304 |
function.
|
|
2305 |
|
|
2306 |
\sa contains()
|
|
2307 |
*/
|
|
2308 |
|
|
2309 |
bool QRectF::intersects(const QRectF &r) const
|
|
2310 |
{
|
|
2311 |
qreal l1 = xp;
|
|
2312 |
qreal r1 = xp;
|
|
2313 |
if (w < 0)
|
|
2314 |
l1 += w;
|
|
2315 |
else
|
|
2316 |
r1 += w;
|
|
2317 |
if (l1 == r1) // null rect
|
|
2318 |
return false;
|
|
2319 |
|
|
2320 |
qreal l2 = r.xp;
|
|
2321 |
qreal r2 = r.xp;
|
|
2322 |
if (r.w < 0)
|
|
2323 |
l2 += r.w;
|
|
2324 |
else
|
|
2325 |
r2 += r.w;
|
|
2326 |
if (l2 == r2) // null rect
|
|
2327 |
return false;
|
|
2328 |
|
|
2329 |
if (l1 >= r2 || l2 >= r1)
|
|
2330 |
return false;
|
|
2331 |
|
|
2332 |
qreal t1 = yp;
|
|
2333 |
qreal b1 = yp;
|
|
2334 |
if (h < 0)
|
|
2335 |
t1 += h;
|
|
2336 |
else
|
|
2337 |
b1 += h;
|
|
2338 |
if (t1 == b1) // null rect
|
|
2339 |
return false;
|
|
2340 |
|
|
2341 |
qreal t2 = r.yp;
|
|
2342 |
qreal b2 = r.yp;
|
|
2343 |
if (r.h < 0)
|
|
2344 |
t2 += r.h;
|
|
2345 |
else
|
|
2346 |
b2 += r.h;
|
|
2347 |
if (t2 == b2) // null rect
|
|
2348 |
return false;
|
|
2349 |
|
|
2350 |
if (t1 >= b2 || t2 >= b1)
|
|
2351 |
return false;
|
|
2352 |
|
|
2353 |
return true;
|
|
2354 |
}
|
|
2355 |
|
|
2356 |
/*!
|
|
2357 |
\fn QRect QRectF::toRect() const
|
|
2358 |
|
|
2359 |
Returns a QRect based on the values of this rectangle. Note that the
|
|
2360 |
coordinates in the returned rectangle are rounded to the nearest integer.
|
|
2361 |
|
|
2362 |
\sa QRectF(), toAlignedRect()
|
|
2363 |
*/
|
|
2364 |
|
|
2365 |
/*!
|
|
2366 |
\fn QRect QRectF::toAlignedRect() const
|
|
2367 |
\since 4.3
|
|
2368 |
|
|
2369 |
Returns a QRect based on the values of this rectangle that is the
|
|
2370 |
smallest possible integer rectangle that completely contains this
|
|
2371 |
rectangle.
|
|
2372 |
|
|
2373 |
\sa toRect()
|
|
2374 |
*/
|
|
2375 |
|
|
2376 |
QRect QRectF::toAlignedRect() const
|
|
2377 |
{
|
|
2378 |
int xmin = int(qFloor(xp));
|
|
2379 |
int xmax = int(qCeil(xp + w));
|
|
2380 |
int ymin = int(qFloor(yp));
|
|
2381 |
int ymax = int(qCeil(yp + h));
|
|
2382 |
return QRect(xmin, ymin, xmax - xmin, ymax - ymin);
|
|
2383 |
}
|
|
2384 |
|
|
2385 |
/*!
|
|
2386 |
\fn void QRectF::moveCenter(const QPointF &position)
|
|
2387 |
|
|
2388 |
Moves the rectangle, leaving the center point at the given \a
|
|
2389 |
position. The rectangle's size is unchanged.
|
|
2390 |
|
|
2391 |
\sa center()
|
|
2392 |
*/
|
|
2393 |
|
|
2394 |
/*!
|
|
2395 |
\fn bool operator==(const QRectF &r1, const QRectF &r2)
|
|
2396 |
\relates QRectF
|
|
2397 |
|
|
2398 |
Returns true if the rectangles \a r1 and \a r2 are equal,
|
|
2399 |
otherwise returns false.
|
|
2400 |
*/
|
|
2401 |
|
|
2402 |
|
|
2403 |
/*!
|
|
2404 |
\fn bool operator!=(const QRectF &r1, const QRectF &r2)
|
|
2405 |
\relates QRectF
|
|
2406 |
|
|
2407 |
Returns true if the rectangles \a r1 and \a r2 are different, otherwise
|
|
2408 |
returns false.
|
|
2409 |
*/
|
|
2410 |
|
|
2411 |
/*****************************************************************************
|
|
2412 |
QRectF stream functions
|
|
2413 |
*****************************************************************************/
|
|
2414 |
#ifndef QT_NO_DATASTREAM
|
|
2415 |
/*!
|
|
2416 |
\fn QDataStream &operator<<(QDataStream &stream, const QRectF &rectangle)
|
|
2417 |
|
|
2418 |
\relates QRectF
|
|
2419 |
|
|
2420 |
Writes the \a rectangle to the \a stream, and returns a reference to the
|
|
2421 |
stream.
|
|
2422 |
|
|
2423 |
\sa \link datastreamformat.html Format of the QDataStream operators \endlink
|
|
2424 |
*/
|
|
2425 |
|
|
2426 |
QDataStream &operator<<(QDataStream &s, const QRectF &r)
|
|
2427 |
{
|
|
2428 |
s << double(r.x()) << double(r.y()) << double(r.width()) << double(r.height());
|
|
2429 |
return s;
|
|
2430 |
}
|
|
2431 |
|
|
2432 |
/*!
|
|
2433 |
\fn QDataStream &operator>>(QDataStream &stream, QRectF &rectangle)
|
|
2434 |
|
|
2435 |
\relates QRectF
|
|
2436 |
|
|
2437 |
Reads a \a rectangle from the \a stream, and returns a reference to the
|
|
2438 |
stream.
|
|
2439 |
|
|
2440 |
\sa \link datastreamformat.html Format of the QDataStream operators \endlink
|
|
2441 |
*/
|
|
2442 |
|
|
2443 |
QDataStream &operator>>(QDataStream &s, QRectF &r)
|
|
2444 |
{
|
|
2445 |
double x, y, w, h;
|
|
2446 |
s >> x;
|
|
2447 |
s >> y;
|
|
2448 |
s >> w;
|
|
2449 |
s >> h;
|
|
2450 |
r.setRect(qreal(x), qreal(y), qreal(w), qreal(h));
|
|
2451 |
return s;
|
|
2452 |
}
|
|
2453 |
|
|
2454 |
#endif // QT_NO_DATASTREAM
|
|
2455 |
|
|
2456 |
|
|
2457 |
#ifndef QT_NO_DEBUG_STREAM
|
|
2458 |
QDebug operator<<(QDebug dbg, const QRectF &r) {
|
|
2459 |
dbg.nospace() << "QRectF(" << r.x() << ',' << r.y() << ' '
|
|
2460 |
<< r.width() << 'x' << r.height() << ')';
|
|
2461 |
return dbg.space();
|
|
2462 |
}
|
|
2463 |
#endif
|
|
2464 |
|
|
2465 |
QT_END_NAMESPACE
|