1 /* |
|
2 * Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: LandmarksUi Content File - |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 |
|
20 |
|
21 |
|
22 |
|
23 |
|
24 |
|
25 // INCLUDE FILES |
|
26 #include <e32math.h> |
|
27 #include "CLmkMfneFloat.h" |
|
28 #include <aknutils.h> |
|
29 |
|
30 namespace { |
|
31 |
|
32 const TInt KNumOtherSymbols = 2; // +/- and decimal point |
|
33 |
|
34 _LIT(KMinus,"-"); |
|
35 |
|
36 const TInt KEventCodeStarSign(42); |
|
37 const TInt KEventCodeMinusSign(45); |
|
38 const TInt KKeyToMatchPoint = 35; // Shift/Hash |
|
39 const TInt KPointKeyFromQwerty = 46; |
|
40 |
|
41 #if defined(_DEBUG) |
|
42 void Panic(TInt aReason) |
|
43 { |
|
44 _LIT(KPanicCategory, "LMK_MFNE_FLT"); |
|
45 User::Panic(KPanicCategory, aReason); |
|
46 } |
|
47 #endif |
|
48 |
|
49 TReal Nan() |
|
50 { |
|
51 TRealX nan; |
|
52 nan.SetNaN(); |
|
53 return nan; |
|
54 } |
|
55 |
|
56 TBool IsAnyDigit(TChar aCharacter) |
|
57 { |
|
58 return (aCharacter.GetNumericValue() != KErrNotFound); |
|
59 } |
|
60 |
|
61 void TrimRightmostChar(TDes& aText) |
|
62 { |
|
63 if (aText.Length()) |
|
64 { |
|
65 aText.SetLength(aText.Length() - 1); |
|
66 } |
|
67 } |
|
68 } |
|
69 |
|
70 // --------------------------------------------------------- |
|
71 // CLmkMfneFloat::CLmkMfneFloat |
|
72 // --------------------------------------------------------- |
|
73 // |
|
74 CLmkMfneFloat::CLmkMfneFloat( |
|
75 TInt aMaxDigits, |
|
76 TInt aMaxDecimalDigits) |
|
77 : |
|
78 iMaxDigits(aMaxDigits), |
|
79 iMaxDecimalDigits(aMaxDecimalDigits) |
|
80 { |
|
81 __ASSERT_DEBUG(aMaxDigits > 0, Panic(KErrArgument)); |
|
82 __ASSERT_DEBUG(aMaxDecimalDigits > 0, Panic(KErrArgument)); |
|
83 __ASSERT_DEBUG(aMaxDecimalDigits <= aMaxDigits, Panic(KErrArgument)); |
|
84 } |
|
85 |
|
86 // --------------------------------------------------------- |
|
87 // CLmkMfneFloat::~CLmkMfneFloat |
|
88 // --------------------------------------------------------- |
|
89 // |
|
90 CLmkMfneFloat::~CLmkMfneFloat() |
|
91 { |
|
92 delete iText; |
|
93 } |
|
94 |
|
95 // --------------------------------------------------------- |
|
96 // CLmkMfneFloat::NewL |
|
97 // --------------------------------------------------------- |
|
98 // |
|
99 CLmkMfneFloat* CLmkMfneFloat::NewL( |
|
100 TInt aMaxDigits, |
|
101 TInt aMaxDecimalDigits) |
|
102 { |
|
103 CLmkMfneFloat* number = new(ELeave) |
|
104 CLmkMfneFloat(aMaxDigits, aMaxDecimalDigits); |
|
105 |
|
106 CleanupStack::PushL(number); |
|
107 number->ConstructL(); |
|
108 CleanupStack::Pop(); |
|
109 |
|
110 return number; |
|
111 } |
|
112 |
|
113 // --------------------------------------------------------- |
|
114 // CLmkMfneFloat::ConstructL |
|
115 // --------------------------------------------------------- |
|
116 // |
|
117 void CLmkMfneFloat::ConstructL() |
|
118 { |
|
119 iText = HBufC::NewL(MaxNumOfChars()); |
|
120 } |
|
121 |
|
122 // --------------------------------------------------------- |
|
123 // CLmkMfneFloat::SetLimits |
|
124 // --------------------------------------------------------- |
|
125 // |
|
126 TBool CLmkMfneFloat::SetLimits( |
|
127 TReal aMinimumValue, |
|
128 TReal aMaximumValue) |
|
129 { |
|
130 __ASSERT_DEBUG( |
|
131 Math::IsNaN(aMinimumValue) || |
|
132 Math::IsNaN(aMaximumValue) || |
|
133 (aMinimumValue < aMaximumValue), Panic(KErrArgument)); |
|
134 |
|
135 iMinimumValue = aMinimumValue; |
|
136 iMaximumValue = aMaximumValue; |
|
137 |
|
138 return EnsureValueInLimits(ValueFromText(*iText)); |
|
139 } |
|
140 |
|
141 // --------------------------------------------------------- |
|
142 // CLmkMfneFloat::GetLimits |
|
143 // --------------------------------------------------------- |
|
144 // |
|
145 void CLmkMfneFloat::GetLimits( |
|
146 TReal& aMinimumValue, |
|
147 TReal& aMaximumValue) const |
|
148 { |
|
149 aMinimumValue = iMinimumValue; |
|
150 aMaximumValue = iMaximumValue; |
|
151 } |
|
152 |
|
153 // --------------------------------------------------------- |
|
154 // CLmkMfneFloat::SetValue |
|
155 // --------------------------------------------------------- |
|
156 // |
|
157 void CLmkMfneFloat::SetValue(TReal aValue) |
|
158 { |
|
159 TPtr ptr(iText->Des()); |
|
160 TextFromValue(aValue, ptr); |
|
161 AknTextUtils::DisplayTextLanguageSpecificNumberConversion( ptr ); |
|
162 EnsureValueInLimits(aValue); |
|
163 iIsBeingEditedWithCursor = EFalse; |
|
164 } |
|
165 |
|
166 // --------------------------------------------------------- |
|
167 // CLmkMfneFloat::Value |
|
168 // --------------------------------------------------------- |
|
169 // |
|
170 TReal CLmkMfneFloat::Value() const |
|
171 { |
|
172 return ValueFromText(*iText); |
|
173 } |
|
174 |
|
175 // --------------------------------------------------------- |
|
176 // CLmkMfneFloat::MaximumWidthInPixels |
|
177 // --------------------------------------------------------- |
|
178 // |
|
179 TInt CLmkMfneFloat::MaximumWidthInPixels( |
|
180 const CFont& aFont, |
|
181 TBool /*aShrinkToMinimumSize*/) |
|
182 { |
|
183 TLocale locale; |
|
184 TInt digitWidth = |
|
185 TFindWidthOfWidestDigitType(locale.DigitType()).MaximumWidthInPixels(aFont); |
|
186 |
|
187 return MaxNumOfChars() * digitWidth; |
|
188 } |
|
189 |
|
190 // --------------------------------------------------------- |
|
191 // CLmkMfneFloat::InputCapabilities |
|
192 // --------------------------------------------------------- |
|
193 // |
|
194 TCoeInputCapabilities CLmkMfneFloat::InputCapabilities() const |
|
195 { |
|
196 return TCoeInputCapabilities(TCoeInputCapabilities::EWesternNumericReal); |
|
197 } |
|
198 |
|
199 // --------------------------------------------------------- |
|
200 // CLmkMfneFloat::IsEditable |
|
201 // --------------------------------------------------------- |
|
202 // |
|
203 TBool CLmkMfneFloat::IsEditable() const |
|
204 { |
|
205 return ETrue; |
|
206 } |
|
207 |
|
208 // --------------------------------------------------------- |
|
209 // CLmkMfneFloat::HandleHighlight |
|
210 // --------------------------------------------------------- |
|
211 // |
|
212 void CLmkMfneFloat::HandleHighlight() |
|
213 { |
|
214 iFocus = ETrue; |
|
215 if ((iText->Length() == 0)) |
|
216 { |
|
217 iIsBeingEditedWithCursor = ETrue; |
|
218 } |
|
219 } |
|
220 |
|
221 // --------------------------------------------------------- |
|
222 // CLmkMfneFloat::HighlightType |
|
223 // --------------------------------------------------------- |
|
224 // |
|
225 CEikMfneField::THighlightType CLmkMfneFloat::HighlightType() const |
|
226 { |
|
227 if (iFocus) |
|
228 { |
|
229 return iIsBeingEditedWithCursor ? ECursor : EInverseVideo; |
|
230 } |
|
231 else |
|
232 { |
|
233 return EInverseVideo; |
|
234 } |
|
235 } |
|
236 |
|
237 // --------------------------------------------------------- |
|
238 // CLmkMfneFloat::HandleDeHighlight |
|
239 // --------------------------------------------------------- |
|
240 // |
|
241 void CLmkMfneFloat::HandleDeHighlight( |
|
242 const CFont& /*aFont*/, |
|
243 CEikonEnv& /*aEikonEnv*/, |
|
244 TBool& aDataAltered, |
|
245 TBool& /*aError*/) |
|
246 { |
|
247 iIsBeingEditedWithCursor = EFalse; |
|
248 iFocus = EFalse; |
|
249 |
|
250 TPtr text(iText->Des()); |
|
251 if (Math::IsNaN(ValueFromText(text))) |
|
252 { |
|
253 text.Zero(); |
|
254 aDataAltered = ETrue; |
|
255 } |
|
256 } |
|
257 |
|
258 // --------------------------------------------------------- |
|
259 // CLmkMfneFloat::HandleKey |
|
260 // --------------------------------------------------------- |
|
261 // |
|
262 void CLmkMfneFloat::HandleKey( |
|
263 const CFont& /*aFont*/, |
|
264 const TKeyEvent& aKeyEvent, |
|
265 TBool /*aInterpretLeftAndRightAsEarEvents*/, |
|
266 TBool& aDataAltered, |
|
267 TInt& aHighlightIncrement) |
|
268 { |
|
269 TChar ch = aKeyEvent.iCode; |
|
270 TPtr text = iText->Des(); |
|
271 |
|
272 switch (ch) |
|
273 { |
|
274 case EKeyLeftArrow: |
|
275 case EKeyRightArrow: |
|
276 HandleLeftOrRightArrow(ch, aDataAltered, aHighlightIncrement); |
|
277 break; |
|
278 |
|
279 case EKeyBackspace: |
|
280 if (text.Length()) |
|
281 { |
|
282 iIsBeingEditedWithCursor = ETrue; |
|
283 TrimRightmostChar(text); |
|
284 if (text == KMinus) |
|
285 { |
|
286 text.Zero(); |
|
287 } |
|
288 aDataAltered=ETrue; |
|
289 } |
|
290 break; |
|
291 |
|
292 case KEventCodeStarSign: |
|
293 case KEventCodeMinusSign: |
|
294 // if negative values allowed |
|
295 if (Math::IsNaN(iMinimumValue) || iMinimumValue < 0) |
|
296 { |
|
297 if (!iIsBeingEditedWithCursor) |
|
298 { |
|
299 iIsBeingEditedWithCursor = ETrue; |
|
300 text.Zero(); |
|
301 } |
|
302 |
|
303 if (text.Length() == 0) |
|
304 { |
|
305 text.Append(KMinus); |
|
306 aDataAltered=ETrue; |
|
307 } |
|
308 } |
|
309 break; |
|
310 |
|
311 default: |
|
312 TLocale locale; |
|
313 TChar point = locale.DecimalSeparator(); |
|
314 |
|
315 if ((ch == KKeyToMatchPoint || ch == KPointKeyFromQwerty ) && (iIsBeingEditedWithCursor)) |
|
316 { |
|
317 if (IsDecimalSeparatorAllowed(text)) |
|
318 { |
|
319 text.Append(point); |
|
320 aDataAltered = ETrue; |
|
321 } |
|
322 } |
|
323 |
|
324 if (IsAnyDigit(ch)) |
|
325 { |
|
326 if (!iIsBeingEditedWithCursor) |
|
327 { |
|
328 iIsBeingEditedWithCursor = ETrue; |
|
329 text.Zero(); |
|
330 aDataAltered=ETrue; |
|
331 } |
|
332 |
|
333 if (IsMoreDigitsAllowed(text)) |
|
334 { |
|
335 text.Append(ch); |
|
336 aDataAltered = ETrue; |
|
337 |
|
338 // check that value is within limits |
|
339 if (EnsureValueInLimits(ValueFromText(text))) |
|
340 { |
|
341 // value is changed, make whole field selected |
|
342 iIsBeingEditedWithCursor = EFalse; |
|
343 } |
|
344 } |
|
345 else |
|
346 { |
|
347 aHighlightIncrement = 1; |
|
348 } |
|
349 } |
|
350 break; |
|
351 } |
|
352 } |
|
353 |
|
354 // --------------------------------------------------------- |
|
355 // CLmkMfneFloat::EnsureValueInLimits |
|
356 // --------------------------------------------------------- |
|
357 // |
|
358 TBool CLmkMfneFloat::EnsureValueInLimits(TReal aValue) |
|
359 { |
|
360 if ( !Math::IsNaN(aValue)) |
|
361 { |
|
362 TPtr ptr(iText->Des()); |
|
363 if (aValue < iMinimumValue) |
|
364 { |
|
365 TextFromValue(iMinimumValue, ptr); |
|
366 return ETrue; |
|
367 } |
|
368 |
|
369 if (aValue > iMaximumValue) |
|
370 { |
|
371 TextFromValue(iMaximumValue, ptr); |
|
372 return ETrue; |
|
373 } |
|
374 } |
|
375 return EFalse; |
|
376 } |
|
377 |
|
378 // --------------------------------------------------------- |
|
379 // CLmkMfneFloat::Text |
|
380 // --------------------------------------------------------- |
|
381 // |
|
382 const TDesC& CLmkMfneFloat::Text() const |
|
383 { |
|
384 TPtr ptr = (iText->Des()); |
|
385 AknTextUtils::DisplayTextLanguageSpecificNumberConversion( ptr ); |
|
386 return *iText; |
|
387 } |
|
388 |
|
389 // --------------------------------------------------------- |
|
390 // CLmkMfneFloat::MaxNumOfChars |
|
391 // --------------------------------------------------------- |
|
392 // |
|
393 TInt CLmkMfneFloat::MaxNumOfChars() const |
|
394 { |
|
395 return iMaxDigits + KNumOtherSymbols; |
|
396 } |
|
397 |
|
398 // --------------------------------------------------------- |
|
399 // CLmkMfneFloat::TextHasDecimalSeparator |
|
400 // --------------------------------------------------------- |
|
401 // |
|
402 TBool CLmkMfneFloat::IsDecimalSeparatorAllowed(const TDesC& aText) const |
|
403 { |
|
404 if (Math::IsNaN(ValueFromText(aText))) |
|
405 { |
|
406 return EFalse; |
|
407 } |
|
408 |
|
409 TLocale locale; |
|
410 TChar point = locale.DecimalSeparator(); |
|
411 TInt i = 0; |
|
412 while (i < aText.Length()) |
|
413 { |
|
414 if (TChar(aText[i++]) == point) |
|
415 { |
|
416 return EFalse; |
|
417 } |
|
418 } |
|
419 |
|
420 return (aText.Length() < MaxNumOfChars()); |
|
421 } |
|
422 |
|
423 // --------------------------------------------------------- |
|
424 // CLmkMfneFloat::ValueFromText |
|
425 // --------------------------------------------------------- |
|
426 // |
|
427 TBool CLmkMfneFloat::IsMoreDigitsAllowed(const TDesC& aText) const |
|
428 { |
|
429 // check that number of allowed digits is less then iMaxDigits |
|
430 TInt digits = 0, decimalDigits = 0; |
|
431 TInt isDecimalPart = EFalse; |
|
432 TLocale locale; |
|
433 TChar point = locale.DecimalSeparator(); |
|
434 |
|
435 // if string starts with 0, then only decimal point is allowed |
|
436 _LIT(KSingleZero, "0"); |
|
437 _LIT(KMinusZero, "-0"); |
|
438 |
|
439 if (aText == KSingleZero || aText == KMinusZero) |
|
440 { |
|
441 return EFalse; |
|
442 } |
|
443 |
|
444 // other cases - check total amount of digits |
|
445 // and amount of decimal digits |
|
446 for (TInt i = 0; i < aText.Length(); i++) |
|
447 { |
|
448 if (IsAnyDigit(aText[i])) |
|
449 { |
|
450 digits++; |
|
451 } |
|
452 if (isDecimalPart) |
|
453 { |
|
454 decimalDigits++; |
|
455 } |
|
456 if (aText[i] == point) |
|
457 { |
|
458 isDecimalPart = ETrue; |
|
459 } |
|
460 } |
|
461 return ((digits < iMaxDigits) && (decimalDigits < iMaxDecimalDigits)); |
|
462 } |
|
463 |
|
464 // --------------------------------------------------------- |
|
465 // CLmkMfneFloat::ValueFromText |
|
466 // --------------------------------------------------------- |
|
467 // |
|
468 TReal CLmkMfneFloat::ValueFromText(const TDesC& aText) const |
|
469 { |
|
470 if (aText.Length() == 0) |
|
471 { |
|
472 return Nan(); |
|
473 } |
|
474 |
|
475 TBool isNegative(EFalse); |
|
476 TInt integer(0); |
|
477 TInt integerDigits(0); |
|
478 TBool fractionPart(EFalse); |
|
479 TInt fraction(0); |
|
480 TInt fractionDigits(0); |
|
481 TLocale locale; |
|
482 |
|
483 for (TInt i = 0; i < aText.Length(); i++) |
|
484 { |
|
485 TChar ch(aText[i]); |
|
486 if (ch == '-') |
|
487 { |
|
488 __ASSERT_DEBUG(i == 0, Panic(KErrGeneral)); |
|
489 isNegative = ETrue; |
|
490 continue; |
|
491 } |
|
492 |
|
493 if (ch == locale.DecimalSeparator()) |
|
494 { |
|
495 __ASSERT_DEBUG(fractionPart == EFalse, Panic(KErrGeneral)); |
|
496 fractionPart = ETrue; |
|
497 continue; |
|
498 } |
|
499 |
|
500 TInt val = ch.GetNumericValue(); |
|
501 if (val >= 0) |
|
502 { |
|
503 if (!fractionPart) |
|
504 { |
|
505 integer = integer * 10 + val; |
|
506 integerDigits++; |
|
507 } |
|
508 else |
|
509 { |
|
510 fraction = fraction * 10 + val; |
|
511 fractionDigits++; |
|
512 } |
|
513 } |
|
514 } |
|
515 |
|
516 // integer part must contain at least "0". |
|
517 if (integerDigits < 1) |
|
518 { |
|
519 return Nan(); |
|
520 } |
|
521 |
|
522 TReal value(fraction); |
|
523 for (TInt i = 0; i < fractionDigits; i++) |
|
524 { |
|
525 value /= 10; |
|
526 } |
|
527 |
|
528 value += TReal(integer); |
|
529 return (isNegative) ? -value : value; |
|
530 } |
|
531 |
|
532 // --------------------------------------------------------- |
|
533 // CLmkMfneFloat::TextFromValue |
|
534 // --------------------------------------------------------- |
|
535 // |
|
536 void CLmkMfneFloat::TextFromValue(TReal aValue, TDes& aText) const |
|
537 { |
|
538 aText.SetLength(0); |
|
539 |
|
540 if (Math::IsNaN(aValue)) |
|
541 { |
|
542 return; |
|
543 } |
|
544 |
|
545 TRealFormat format; |
|
546 format.iType = KRealFormatFixed; |
|
547 format.iTriLen = 0; // no triad separations |
|
548 format.iWidth = MaxNumOfChars(); |
|
549 format.iPlaces = (aValue == 0) ? 0 : iMaxDecimalDigits; |
|
550 |
|
551 // convert real value to a string |
|
552 aText.Num(aValue, format); |
|
553 |
|
554 // cut trailing zeroes from decimal part |
|
555 TLocale locale; |
|
556 TInt pointIndex = aText.Locate(locale.DecimalSeparator()); |
|
557 if (pointIndex != KErrNotFound) |
|
558 { |
|
559 TInt newLength = aText.Length(); |
|
560 for (TInt i = aText.Length() - 1; i > pointIndex; i--) |
|
561 { |
|
562 if (aText[i] == '0') |
|
563 { |
|
564 newLength--; |
|
565 } |
|
566 else |
|
567 { |
|
568 break; |
|
569 } |
|
570 } |
|
571 |
|
572 // if only decimal point left, cut it also |
|
573 if (aText[newLength-1] == locale.DecimalSeparator()) |
|
574 { |
|
575 newLength--; |
|
576 } |
|
577 |
|
578 aText.SetLength(newLength); |
|
579 } |
|
580 } |
|