bool QDragManager::eventFilter( QObject *o, QEvent *e ) { if ( !o->isWidgetType() ) return FALSE; switch( e->type() ) { case QEvent::KeyPress: case QEvent::KeyRelease: { QKeyEvent *ke = ((QKeyEvent*)e); if ( ke->key() == Key_Escape && e->type() == QEvent::KeyPress ) { cancel(); qApp->removeEventFilter( this ); dragSource = 0; } else { updateMode(ke->stateAfter()); updateCursor(); } return TRUE; // Eat all key events } case QEvent::MouseButtonPress: case QEvent::MouseMove: { QMouseEvent *me = (QMouseEvent *)e; if ( me->state() & ( QMouseEvent::LeftButton | QMouseEvent::MidButton | QMouseEvent::RightButton ) ) { QWidget *cw = QApplication::widgetAt( me->globalPos(), TRUE ); // Fix for when we move mouse on to the deco widget if ( qt_qws_dnd_deco && cw == qt_qws_dnd_deco ) cw = dropWidget; if ( dropWidget != cw ) { if ( dropWidget ) { QDragLeaveEvent dle; QApplication::sendEvent( dropWidget, &dle ); willDrop = FALSE; updateCursor(); restoreCursor = TRUE; dropWidget = NULL; } if ( cw && cw->acceptDrops() ) { dropWidget = cw; QDragEnterEvent dee( me->pos() ); QApplication::sendEvent( dropWidget, &dee ); willDrop = dee.isAccepted(); updateCursor(); restoreCursor = TRUE; } } else if ( cw ) { QDragMoveEvent dme( me->pos() ); QApplication::sendEvent( cw, &dme ); updatePixmap(); } } return TRUE; // Eat all mouse events } case QEvent::MouseButtonRelease: { qApp->removeEventFilter( this ); if ( qt_qws_dnd_deco ) delete qt_qws_dnd_deco; qt_qws_dnd_deco = 0; if ( restoreCursor ) { willDrop = FALSE; myRestoreOverrideCursor(); restoreCursor = FALSE; } if ( dropWidget ) { QMouseEvent *me = (QMouseEvent *)e; QDropEvent de( me->pos() ); QApplication::sendEvent( dropWidget, &de ); dropWidget = NULL; } return TRUE; // Eat all mouse events } default: break; } return FALSE; }
bool QDragManager::eventFilter(QObject *o, QEvent *e) { if (beingCancelled) { if (e->type() == QEvent::KeyRelease && static_cast<QKeyEvent*>(e)->key() == Qt::Key_Escape) { qApp->removeEventFilter(this); Q_ASSERT(object == 0); beingCancelled = false; #ifndef QT_NO_LOCALEVENTLOOP eventLoop->exit(); #else asyncDragFinished(); #endif return true; // block the key release } return false; } if (!o->isWidgetType()) return false; switch(e->type()) { case QEvent::ShortcutOverride: // prevent accelerators from firing while dragging e->accept(); return true; case QEvent::KeyPress: case QEvent::KeyRelease: { QKeyEvent *ke = ((QKeyEvent*)e); if (ke->key() == Qt::Key_Escape && e->type() == QEvent::KeyPress) { cancel(); qApp->removeEventFilter(this); beingCancelled = false; #ifndef QT_NO_LOCALEVENTLOOP eventLoop->exit(); #else asyncDragFinished(); #endif } else { updateCursor(); } return true; // Eat all key events } case QEvent::MouseButtonPress: case QEvent::MouseMove: { if (!object) { //#### this should not happen qWarning("QDragManager::eventFilter: No object"); return true; } QDragManager *manager = QDragManager::self(); QMimeData *dropData = manager->object ? manager->dragPrivate()->data : manager->dropData; if (manager->object) possible_actions = manager->dragPrivate()->possible_actions; else possible_actions = Qt::IgnoreAction; QMouseEvent *me = (QMouseEvent *)e; if (me->buttons()) { Qt::DropAction prevAction = global_accepted_action; QWidget *cw = QApplication::widgetAt(me->globalPos()); // Fix for when we move mouse on to the deco widget if (qt_qws_dnd_deco && cw == qt_qws_dnd_deco) cw = object->target(); while (cw && !cw->acceptDrops() && !cw->isWindow()) cw = cw->parentWidget(); if (object->target() != cw) { if (object->target()) { QDragLeaveEvent dle; QApplication::sendEvent(object->target(), &dle); willDrop = false; global_accepted_action = Qt::IgnoreAction; updateCursor(); restoreCursor = true; object->d_func()->target = 0; } if (cw && cw->acceptDrops()) { object->d_func()->target = cw; QDragEnterEvent dee(cw->mapFromGlobal(me->globalPos()), possible_actions, dropData, me->buttons(), me->modifiers()); QApplication::sendEvent(object->target(), &dee); willDrop = dee.isAccepted() && dee.dropAction() != Qt::IgnoreAction; global_accepted_action = willDrop ? dee.dropAction() : Qt::IgnoreAction; updateCursor(); restoreCursor = true; } } else if (cw) { QDragMoveEvent dme(cw->mapFromGlobal(me->globalPos()), possible_actions, dropData, me->buttons(), me->modifiers()); if (global_accepted_action != Qt::IgnoreAction) { dme.setDropAction(global_accepted_action); dme.accept(); } QApplication::sendEvent(cw, &dme); willDrop = dme.isAccepted(); global_accepted_action = willDrop ? dme.dropAction() : Qt::IgnoreAction; updatePixmap(); updateCursor(); } if (global_accepted_action != prevAction) emitActionChanged(global_accepted_action); } return true; // Eat all mouse events } case QEvent::MouseButtonRelease: { qApp->removeEventFilter(this); if (restoreCursor) { willDrop = false; #ifndef QT_NO_CURSOR QApplication::restoreOverrideCursor(); #endif restoreCursor = false; } if (object && object->target()) { QMouseEvent *me = (QMouseEvent *)e; QDragManager *manager = QDragManager::self(); QMimeData *dropData = manager->object ? manager->dragPrivate()->data : manager->dropData; QDropEvent de(object->target()->mapFromGlobal(me->globalPos()), possible_actions, dropData, me->buttons(), me->modifiers()); QApplication::sendEvent(object->target(), &de); if (de.isAccepted()) global_accepted_action = de.dropAction(); else global_accepted_action = Qt::IgnoreAction; if (object) object->deleteLater(); drag_object = object = 0; } #ifndef QT_NO_LOCALEVENTLOOP eventLoop->exit(); #else asyncDragFinished(); #endif return true; // Eat all mouse events } default: break; } return false; }
bool QDragManager::eventFilter(QObject *o, QEvent *e) { if (beingCancelled) { return false; } if (!o->isWidgetType()) return false; switch(e->type()) { case QEvent::MouseButtonPress: { } case QEvent::MouseMove: { if (!object) { //#### this should not happen qWarning("QDragManager::eventFilter: No object"); return true; } QDragManager *manager = QDragManager::self(); QMimeData *dropData = manager->object ? manager->dragPrivate()->data : manager->dropData; if (manager->object) possible_actions = manager->dragPrivate()->possible_actions; else possible_actions = Qt::IgnoreAction; QMouseEvent *me = (QMouseEvent *)e; if (me->buttons()) { Qt::DropAction prevAction = global_accepted_action; QWidget *cw = QApplication::widgetAt(me->globalPos()); // map the Coords relative to the window. if (!cw) return true; while (cw && !cw->acceptDrops() && !cw->isWindow()) cw = cw->parentWidget(); bool oldWillDrop = willDrop; if (object->target() != cw) { if (object->target()) { QDragLeaveEvent dle; QApplication::sendEvent(object->target(), &dle); willDrop = false; global_accepted_action = Qt::IgnoreAction; if (oldWillDrop != willDrop) updateCursor(); object->d_func()->target = 0; } if (cw && cw->acceptDrops()) { object->d_func()->target = cw; QDragEnterEvent dee(cw->mapFromGlobal(me->globalPos()), possible_actions, dropData, me->buttons(), me->modifiers()); QApplication::sendEvent(object->target(), &dee); willDrop = dee.isAccepted() && dee.dropAction() != Qt::IgnoreAction; global_accepted_action = willDrop ? dee.dropAction() : Qt::IgnoreAction; if (oldWillDrop != willDrop) updateCursor(); } } else if (cw) { QDragMoveEvent dme(cw->mapFromGlobal(me->globalPos()), possible_actions, dropData, me->buttons(), me->modifiers()); if (global_accepted_action != Qt::IgnoreAction) { dme.setDropAction(global_accepted_action); dme.accept(); } QApplication::sendEvent(cw, &dme); willDrop = dme.isAccepted(); global_accepted_action = willDrop ? dme.dropAction() : Qt::IgnoreAction; if (oldWillDrop != willDrop) { updatePixmap(); updateCursor(); } } if (global_accepted_action != prevAction) emitActionChanged(global_accepted_action); } return true; // Eat all mouse events } case QEvent::MouseButtonRelease: { qApp->removeEventFilter(this); #ifndef QT_NO_CURSOR if (restoreCursor) { QApplication::restoreOverrideCursor(); willDrop = false; restoreCursor = false; } #endif if (object && object->target()) { QMouseEvent *me = (QMouseEvent *)e; QDragManager *manager = QDragManager::self(); QMimeData *dropData = manager->object ? manager->dragPrivate()->data : manager->dropData; QDropEvent de(object->target()->mapFromGlobal(me->globalPos()), possible_actions, dropData, me->buttons(), me->modifiers()); QApplication::sendEvent(object->target(), &de); if (de.isAccepted()) global_accepted_action = de.dropAction(); else global_accepted_action = Qt::IgnoreAction; if (object) object->deleteLater(); drag_object = object = 0; } eventLoop->exit(); return true; // Eat all mouse events } default: break; } return false; }