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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include "qwsmanager_qws.h"

    43 

    44 #ifndef QT_NO_QWS_MANAGER

    45 

    46 #include "qdrawutil.h"

    47 #include "qapplication.h"

    48 #include "qstyle.h"

    49 #include "qwidget.h"

    50 #include "qmenu.h"

    51 #include "qpainter.h"

    52 #include "private/qpainter_p.h"

    53 #include "qregion.h"

    54 #include "qevent.h"

    55 #include "qcursor.h"

    56 #include "qwsdisplay_qws.h"

    57 #include "qdesktopwidget.h"

    58 

    59 #include <private/qapplication_p.h>

    60 #include <private/qwidget_p.h>

    61 #include <private/qbackingstore_p.h>

    62 #include <private/qwindowsurface_qws_p.h>

    63 #include "qdecorationfactory_qws.h"

    64 

    65 #include "qlayout.h"

    66 

    67 #include "qwsmanager_p.h"

    68 

    69 #include <qdebug.h>

    70 

    71 QT_BEGIN_NAMESPACE

    72 

    73 QWidget *QWSManagerPrivate::active = 0;

    74 QPoint QWSManagerPrivate::mousePos;

    75 

    76 

    77 QWSManagerPrivate::QWSManagerPrivate()

    78     : QObjectPrivate(), activeRegion(QDecoration::None), managed(0), popup(0),

    79       previousRegionType(0), previousRegionRepainted(false), entireDecorationNeedsRepaint(false)

    80 {

    81     cached_region.regionType = 0;

    82 }

    83 

    84 QRegion &QWSManager::cachedRegion()

    85 {

    86     return d_func()->cached_region.region;

    87 }

    88 

    89 /*!

    90     \class QWSManager

    91     \ingroup qws

    92     \internal

    93 */

    94 

    95 /*!

    96 

    97 */

    98 QWSManager::QWSManager(QWidget *w)

    99     : QObject(*new QWSManagerPrivate, (QObject*)0)

   100 {

   101     d_func()->managed = w;

   102 

   103 }

   104 

   105 QWSManager::~QWSManager()

   106 {

   107     Q_D(QWSManager);

   108 #ifndef QT_NO_MENU

   109     if (d->popup)

   110         delete d->popup;

   111 #endif

   112     if (d->managed == QWSManagerPrivate::active)

   113         QWSManagerPrivate::active = 0;

   114 }

   115 

   116 QWidget *QWSManager::widget()

   117 {

   118     Q_D(QWSManager);

   119     return d->managed;

   120 }

   121 

   122 QWidget *QWSManager::grabbedMouse()

   123 {

   124     return QWSManagerPrivate::active;

   125 }

   126 

   127 QRegion QWSManager::region()

   128 {

   129     Q_D(QWSManager);

   130     return QApplication::qwsDecoration().region(d->managed, d->managed->geometry());

   131 }

   132 

   133 bool QWSManager::event(QEvent *e)

   134 {

   135     if (QObject::event(e))

   136         return true;

   137 

   138     switch (e->type()) {

   139         case QEvent::MouseMove:

   140             mouseMoveEvent((QMouseEvent*)e);

   141             break;

   142 

   143         case QEvent::MouseButtonPress:

   144             mousePressEvent((QMouseEvent*)e);

   145             break;

   146 

   147         case QEvent::MouseButtonRelease:

   148             mouseReleaseEvent((QMouseEvent*)e);

   149             break;

   150 

   151         case QEvent::MouseButtonDblClick:

   152             mouseDoubleClickEvent((QMouseEvent*)e);

   153             break;

   154 

   155         case QEvent::Paint:

   156             paintEvent((QPaintEvent*)e);

   157             break;

   158 

   159         default:

   160             return false;

   161             break;

   162     }

   163 

   164     return true;

   165 }

   166 

   167 void QWSManager::mousePressEvent(QMouseEvent *e)

   168 {

   169     Q_D(QWSManager);

   170     d->mousePos = e->globalPos();

   171     d->activeRegion = QApplication::qwsDecoration().regionAt(d->managed, d->mousePos);

   172     if(d->cached_region.regionType)

   173         d->previousRegionRepainted |= repaintRegion(d->cached_region.regionType, QDecoration::Pressed);

   174 

   175     if (d->activeRegion == QDecoration::Menu) {

   176         QPoint pos = (QApplication::layoutDirection() == Qt::LeftToRight

   177                       ? d->managed->geometry().topLeft()

   178                       : d->managed->geometry().topRight());

   179         menu(pos);

   180     }

   181     if (d->activeRegion != QDecoration::None &&

   182          d->activeRegion != QDecoration::Menu) {

   183         d->active = d->managed;

   184         d->managed->grabMouse();

   185     }

   186     if (d->activeRegion != QDecoration::None &&

   187          d->activeRegion != QDecoration::Close &&

   188          d->activeRegion != QDecoration::Minimize &&

   189          d->activeRegion != QDecoration::Menu) {

   190         d->managed->raise();

   191     }

   192 

   193     if (e->button() == Qt::RightButton) {

   194         menu(e->globalPos());

   195     }

   196 }

   197 

   198 void QWSManager::mouseReleaseEvent(QMouseEvent *e)

   199 {

   200     Q_D(QWSManager);

   201     d->managed->releaseMouse();

   202     if (d->cached_region.regionType && d->previousRegionRepainted && QApplication::mouseButtons() == 0) {

   203         bool doesHover = repaintRegion(d->cached_region.regionType, QDecoration::Hover);

   204         if (!doesHover) {

   205             repaintRegion(d->cached_region.regionType, QDecoration::Normal);

   206             d->previousRegionRepainted = false;

   207         }

   208     }

   209 

   210     if (e->button() == Qt::LeftButton) {

   211         //handleMove();

   212         int itm = QApplication::qwsDecoration().regionAt(d->managed, e->globalPos());

   213         int activatedItem = d->activeRegion;

   214         d->activeRegion = QDecoration::None;

   215         d->active = 0;

   216         if (activatedItem == itm)

   217             QApplication::qwsDecoration().regionClicked(d->managed, itm);

   218     } else if (d->activeRegion == QDecoration::None) {

   219         d->active = 0;

   220     }

   221 }

   222 

   223 void QWSManager::mouseDoubleClickEvent(QMouseEvent *e)

   224 {

   225     Q_D(QWSManager);

   226     if (e->button() == Qt::LeftButton)

   227         QApplication::qwsDecoration().regionDoubleClicked(d->managed,

   228             QApplication::qwsDecoration().regionAt(d->managed, e->globalPos()));

   229 }

   230 

   231 static inline Qt::CursorShape regionToShape(int region)

   232 {

   233     if (region == QDecoration::None)

   234         return Qt::ArrowCursor;

   235 

   236     static const struct {

   237         int region;

   238         Qt::CursorShape shape;

   239     } r2s[] = {

   240         { QDecoration::TopLeft,     Qt::SizeFDiagCursor },

   241         { QDecoration::Top,         Qt::SizeVerCursor},

   242         { QDecoration::TopRight,    Qt::SizeBDiagCursor},

   243         { QDecoration::Left,        Qt::SizeHorCursor},

   244         { QDecoration::Right,       Qt::SizeHorCursor},

   245         { QDecoration::BottomLeft,  Qt::SizeBDiagCursor},

   246         { QDecoration::Bottom,      Qt::SizeVerCursor},

   247         { QDecoration::BottomRight, Qt::SizeFDiagCursor},

   248         { QDecoration::None,        Qt::ArrowCursor}

   249     };

   250 

   251     int i = 0;

   252     while (region != r2s[i].region && r2s[i].region)

   253         ++i;

   254     return r2s[i].shape;

   255 }

   256 

   257 void QWSManager::mouseMoveEvent(QMouseEvent *e)

   258 {

   259     Q_D(QWSManager);

   260     if (d->newCachedRegion(e->globalPos())) {

   261         if(d->previousRegionType && d->previousRegionRepainted)

   262             repaintRegion(d->previousRegionType, QDecoration::Normal);

   263         if(d->cached_region.regionType) {

   264             d->previousRegionRepainted = repaintRegion(d->cached_region.regionType, QDecoration::Hover);

   265         }

   266     }

   267 

   268 

   269 #ifndef QT_NO_CURSOR

   270     QWSDisplay *qwsd = QApplication::desktop()->qwsDisplay();

   271     qwsd->selectCursor(d->managed, regionToShape(d->cachedRegionAt()));

   272 #endif //QT_NO_CURSOR

   273 

   274     if (d->activeRegion)

   275         handleMove(e->globalPos());

   276 }

   277 

   278 void QWSManager::handleMove(QPoint g)

   279 {

   280     Q_D(QWSManager);

   281 

   282     // don't allow dragging to where the user probably cannot click!

   283     QApplicationPrivate *ap = QApplicationPrivate::instance();

   284     const QRect maxWindowRect = ap->maxWindowRect(qt_screen);

   285     if (maxWindowRect.isValid()) {

   286         if (g.x() < maxWindowRect.x())

   287             g.setX(maxWindowRect.x());

   288         if (g.y() < maxWindowRect.y())

   289             g.setY(maxWindowRect.y());

   290         if (g.x() > maxWindowRect.right())

   291             g.setX(maxWindowRect.right());

   292         if (g.y() > maxWindowRect.bottom())

   293             g.setY(maxWindowRect.bottom());

   294     }

   295 

   296     if (g == d->mousePos)

   297         return;

   298 

   299     if ( d->managed->isMaximized() )

   300         return;

   301 

   302     int x = d->managed->geometry().x();

   303     int y = d->managed->geometry().y();

   304     int w = d->managed->width();

   305     int h = d->managed->height();

   306 

   307     QRect geom(d->managed->geometry());

   308 

   309     QPoint delta = g - d->mousePos;

   310     d->mousePos = g;

   311 

   312     if (d->activeRegion == QDecoration::Title) {

   313         geom = QRect(x + delta.x(), y + delta.y(), w, h);

   314     } else {

   315         bool keepTop = true;

   316         bool keepLeft = true;

   317         switch (d->activeRegion) {

   318         case QDecoration::Top:

   319             geom.setTop(geom.top() + delta.y());

   320             keepTop = false;

   321             break;

   322         case QDecoration::Bottom:

   323             geom.setBottom(geom.bottom() + delta.y());

   324             keepTop = true;

   325             break;

   326         case QDecoration::Left:

   327             geom.setLeft(geom.left() + delta.x());

   328             keepLeft = false;

   329             break;

   330         case QDecoration::Right:

   331             geom.setRight(geom.right() + delta.x());

   332             keepLeft = true;

   333             break;

   334         case QDecoration::TopRight:

   335             geom.setTopRight(geom.topRight() + delta);

   336             keepLeft = true;

   337             keepTop = false;

   338             break;

   339         case QDecoration::TopLeft:

   340             geom.setTopLeft(geom.topLeft() + delta);

   341             keepLeft = false;

   342             keepTop = false;

   343             break;

   344         case QDecoration::BottomLeft:

   345             geom.setBottomLeft(geom.bottomLeft() + delta);

   346             keepLeft = false;

   347             keepTop = true;

   348             break;

   349         case QDecoration::BottomRight:

   350             geom.setBottomRight(geom.bottomRight() + delta);

   351             keepLeft = true;

   352             keepTop = true;

   353             break;

   354         default:

   355             return;

   356         }

   357 

   358         QSize newSize = QLayout::closestAcceptableSize(d->managed, geom.size());

   359 

   360         int dx = newSize.width() - geom.width();

   361         int dy = newSize.height() - geom.height();

   362 

   363         if (keepTop) {

   364             geom.setBottom(geom.bottom() + dy);

   365             d->mousePos.ry() += dy;

   366         } else {

   367             geom.setTop(geom.top() - dy);

   368             d->mousePos.ry() -= dy;

   369         }

   370         if (keepLeft) {

   371             geom.setRight(geom.right() + dx);

   372             d->mousePos.rx() += dx;

   373         } else {

   374             geom.setLeft(geom.left() - dx);

   375             d->mousePos.rx() -= dx;

   376         }

   377     }

   378     if (geom != d->managed->geometry()) {

   379         QApplication::sendPostedEvents();

   380         d->managed->setGeometry(geom);

   381     }

   382 }

   383 

   384 void QWSManager::paintEvent(QPaintEvent *)

   385 {

   386      Q_D(QWSManager);

   387      d->dirtyRegion(QDecoration::All, QDecoration::Normal);

   388 }

   389 

   390 void QWSManagerPrivate::dirtyRegion(int decorationRegion,

   391                                     QDecoration::DecorationState state,

   392                                     const QRegion &clip)

   393 {

   394     QTLWExtra *topextra = managed->d_func()->extra->topextra;

   395     QWidgetBackingStore *bs = topextra->backingStore;

   396     const bool pendingUpdateRequest = bs->isDirty();

   397 

   398     if (decorationRegion == QDecoration::All) {

   399         if (clip.isEmpty())

   400             entireDecorationNeedsRepaint = true;

   401         dirtyRegions.clear();

   402         dirtyStates.clear();

   403     }

   404     int i = dirtyRegions.indexOf(decorationRegion);

   405     if (i >= 0) {

   406         dirtyRegions.removeAt(i);

   407         dirtyStates.removeAt(i);

   408     }

   409 

   410     dirtyRegions.append(decorationRegion);

   411     dirtyStates.append(state);

   412     if (!entireDecorationNeedsRepaint)

   413         dirtyClip += clip;

   414 

   415     if (!pendingUpdateRequest)

   416         QApplication::postEvent(managed, new QEvent(QEvent::UpdateRequest), Qt::LowEventPriority);

   417 }

   418 

   419 void QWSManagerPrivate::clearDirtyRegions()

   420 {

   421     dirtyRegions.clear();

   422     dirtyStates.clear();

   423     dirtyClip = QRegion();

   424     entireDecorationNeedsRepaint = false;

   425 }

   426 

   427 bool QWSManager::repaintRegion(int decorationRegion, QDecoration::DecorationState state)

   428 {

   429     Q_D(QWSManager);

   430 

   431     d->dirtyRegion(decorationRegion, state);

   432     return true;

   433 }

   434 

   435 void QWSManager::menu(const QPoint &pos)

   436 {

   437 #ifdef QT_NO_MENU

   438     Q_UNUSED(pos);

   439 #else

   440     Q_D(QWSManager);

   441     if (d->popup)

   442         delete d->popup;

   443 

   444     // Basic window operation menu

   445     d->popup = new QMenu();

   446     QApplication::qwsDecoration().buildSysMenu(d->managed, d->popup);

   447     connect(d->popup, SIGNAL(triggered(QAction*)), SLOT(menuTriggered(QAction*)));

   448 

   449     d->popup->popup(pos);

   450     d->activeRegion = QDecoration::None;

   451 #endif // QT_NO_MENU

   452 }

   453 

   454 void QWSManager::menuTriggered(QAction *action)

   455 {

   456 #ifdef QT_NO_MENU

   457     Q_UNUSED(action);

   458 #else

   459     Q_D(QWSManager);

   460     QApplication::qwsDecoration().menuTriggered(d->managed, action);

   461     d->popup->deleteLater();

   462     d->popup = 0;

   463 #endif

   464 }

   465 

   466 void QWSManager::startMove()

   467 {

   468     Q_D(QWSManager);

   469     d->mousePos = QCursor::pos();

   470     d->activeRegion = QDecoration::Title;

   471     d->active = d->managed;

   472     d->managed->grabMouse();

   473 }

   474 

   475 void QWSManager::startResize()

   476 {

   477     Q_D(QWSManager);

   478     d->activeRegion = QDecoration::BottomRight;

   479     d->active = d->managed;

   480     d->managed->grabMouse();

   481 }

   482 

   483 void QWSManager::maximize()

   484 {

   485     Q_D(QWSManager);

   486     // find out how much space the decoration needs

   487     const int screen = QApplication::desktop()->screenNumber(d->managed);

   488     const QRect desk = QApplication::desktop()->availableGeometry(screen);

   489     QRect dummy(0, 0, 1, 1);

   490     QRect nr;

   491     QRegion r = QApplication::qwsDecoration().region(d->managed, dummy);

   492     if (r.isEmpty()) {

   493         nr = desk;

   494     } else {

   495         r += dummy; // make sure we get the full window region in case of 0 width borders

   496         QRect rect = r.boundingRect();

   497         nr = QRect(desk.x()-rect.x(), desk.y()-rect.y(),

   498                 desk.width() - (rect.width()==1 ? 0 : rect.width()-1), // ==1 -> dummy

   499                 desk.height() - (rect.height()==1 ? 0 : rect.height()-1));

   500     }

   501     d->managed->setGeometry(nr);

   502 }

   503 

   504 bool QWSManagerPrivate::newCachedRegion(const QPoint &pos)

   505 {

   506     // Check if anything has changed that would affect the region caching

   507     if (managed->windowFlags() == cached_region.windowFlags

   508         && managed->geometry() == cached_region.windowGeometry

   509         && cached_region.region.contains(pos))

   510         return false;

   511 

   512     // Update the cached region

   513     int reg = QApplication::qwsDecoration().regionAt(managed, pos);

   514     if (QWidget::mouseGrabber())

   515         reg = QDecoration::None;

   516 

   517     previousRegionType = cached_region.regionType;

   518     cached_region.regionType = reg;

   519     cached_region.region = QApplication::qwsDecoration().region(managed, managed->geometry(),

   520                                                                 reg);

   521     // Make room for borders around the widget, even if the decoration doesn't have a frame.

   522     if (reg && !(reg & int(QDecoration::Borders))) {

   523         cached_region.region -= QApplication::qwsDecoration().region(managed, managed->geometry(), QDecoration::Borders);

   524     }

   525     cached_region.windowFlags = managed->windowFlags();

   526     cached_region.windowGeometry = managed->geometry();

   527 //    QRect rec = cached_region.region.boundingRect();

   528 //    qDebug("Updated cached region: 0x%04x (%d, %d)  (%d, %d,  %d, %d)",

   529 //           reg, pos.x(), pos.y(), rec.x(), rec.y(), rec.right(), rec.bottom());

   530     return true;

   531 }

   532 

   533 QT_END_NAMESPACE

   534 

   535 #endif //QT_NO_QWS_MANAGER