C++ QDragEnterEvent::accept方法代码示例

bool QDesignerToolBar::eventFilter( QObject *o, QEvent *e )
{
    if ( !o || !e || o->inherits( "QDockWindowHandle" ) || o->inherits( "QDockWindowTitleBar" ) )
	return QToolBar::eventFilter( o, e );

    if ( o == this && e->type() == QEvent::MouseButtonPress &&
	 ( ( QMouseEvent*)e )->button() == LeftButton ) {
	mousePressEvent( (QMouseEvent*)e );
	return TRUE;
    }

    if ( o == this )
	return QToolBar::eventFilter( o, e );

    if ( e->type() == QEvent::MouseButtonPress ) {
	QMouseEvent *ke = (QMouseEvent*)e;
	fixObject( o );
	if ( !o )
	    return FALSE;
	buttonMousePressEvent( ke, o );
	return TRUE;
    } else if(e->type() == QEvent::ContextMenu ) {
	QContextMenuEvent *ce = (QContextMenuEvent*)e;
	fixObject( o );
	if( !o )
	    return FALSE;
	buttonContextMenuEvent( ce, o );
	return TRUE;
    } else if ( e->type() == QEvent::MouseMove ) {
	QMouseEvent *ke = (QMouseEvent*)e;
	fixObject( o );
	if ( !o )
	    return FALSE;
	buttonMouseMoveEvent( ke, o );
	return TRUE;
    } else if ( e->type() == QEvent::MouseButtonRelease ) {
	QMouseEvent *ke = (QMouseEvent*)e;
	fixObject( o );
	if ( !o )
	    return FALSE;
	buttonMouseReleaseEvent( ke, o );
	return TRUE;
    } else if ( e->type() == QEvent::DragEnter ) {
	QDragEnterEvent *de = (QDragEnterEvent*)e;
	if ( de->provides( "application/x-designer-actions" ) ||
	     de->provides( "application/x-designer-actiongroup" ) ||
	     de->provides( "application/x-designer-separator" ) )
	    de->accept();
    } else if ( e->type() == QEvent::DragMove ) {
	QDragMoveEvent *de = (QDragMoveEvent*)e;
	if ( de->provides( "application/x-designer-actions" ) ||
	     de->provides( "application/x-designer-actiongroup" ) ||
	     de->provides( "application/x-designer-separator" ) )
	    de->accept();
    }

    return QToolBar::eventFilter( o, e );
}

bool BookmarkToolBar::eventFilter(QObject *watched, QEvent *event)
{
    if (m_currentMenu && m_currentMenu->isVisible()
            && !m_currentMenu->rect().contains(m_currentMenu->mapFromGlobal(QCursor::pos())))
    {
        // To switch root folders as in a menubar

        KBookmarkActionMenu* act = dynamic_cast<KBookmarkActionMenu *>(actionAt(mapFromGlobal(QCursor::pos())));

        if (event->type() == QEvent::MouseMove && act && act->menu() != m_currentMenu)
        {
            m_currentMenu->hide();
            QPoint pos = mapToGlobal(widgetForAction(act)->pos());
            act->menu()->popup(QPoint(pos.x(), pos.y() + widgetForAction(act)->height()));
        }
        else if (event->type() == QEvent::MouseButtonPress && act)
        {
            m_currentMenu->hide();
        }

        return QObject::eventFilter(watched, event);
    }

    switch (event->type())
    {
    case QEvent::Show:
    {
        if (!m_filled)
        {
            BookmarkManager::self()->fillBookmarkBar(this);
            m_filled = true;
        }
    }
    break;

    case QEvent::ActionRemoved:
    {
        QActionEvent *actionEvent = static_cast<QActionEvent*>(event);
        if (actionEvent && actionEvent->action() != m_dropAction)
        {
            QWidget *widget = widgetForAction(actionEvent->action());
            if (widget)
            {
                widget->removeEventFilter(this);
            }
        }
    }
    break;

    case QEvent::ParentChange:
    {
        QActionEvent *actionEvent = static_cast<QActionEvent*>(event);
        if (actionEvent && actionEvent->action() != m_dropAction)
        {
            QWidget *widget = widgetForAction(actionEvent->action());
            if (widget)
            {
                widget->removeEventFilter(this);
            }
        }
    }
    break;

    case QEvent::DragEnter:
    {
        QDragEnterEvent *dragEvent = static_cast<QDragEnterEvent*>(event);
        if (dragEvent->mimeData()->hasFormat(BookmarkManager::bookmark_mime_type())
                || dragEvent->mimeData()->hasFormat("text/uri-list")
                || dragEvent->mimeData()->hasFormat("text/plain"))
        {
            QFrame* dropIndicatorWidget = new QFrame(this);
            dropIndicatorWidget->setFrameShape(QFrame::VLine);
            m_dropAction = insertWidget(actionAt(dragEvent->pos()), dropIndicatorWidget);

            dragEvent->accept();
        }
    }
    break;

    case QEvent::DragLeave:
    {
        QDragLeaveEvent *dragEvent = static_cast<QDragLeaveEvent*>(event);

        if (m_checkedAction)
        {
            m_checkedAction->setCheckable(false);
            m_checkedAction->setChecked(false);
        }

        delete m_dropAction;
        m_dropAction = 0;
        dragEvent->accept();
    }
    break;

    case QEvent::DragMove:
    {
        QDragMoveEvent *dragEvent = static_cast<QDragMoveEvent*>(event);
        if (dragEvent->mimeData()->hasFormat(BookmarkManager::bookmark_mime_type())
                || dragEvent->mimeData()->hasFormat("text/uri-list")
//.........这里部分代码省略.........

bool
PlayerWidget::eventFilter(QObject *object, QEvent *event)
{
	if(object == m_layeredWidget) {
		if(event->type() == QEvent::DragEnter) {
			QDragEnterEvent *dragEnterEvent = static_cast<QDragEnterEvent *>(event);
			KUrl::List urls = KUrl::List::fromMimeData(dragEnterEvent->mimeData());
			if(!urls.isEmpty())
				dragEnterEvent->accept();
			else
				dragEnterEvent->ignore();
			return true;
		} else if(event->type() == QEvent::DragMove) {
			return true;            // eat event
		} else if(event->type() == QEvent::Drop) {
			QDropEvent *dropEvent = static_cast<QDropEvent *>(event);

			KUrl::List urls = KUrl::List::fromMimeData(dropEvent->mimeData());
			if(!urls.isEmpty()) {
				for(KUrl::List::ConstIterator it = urls.begin(), end = urls.end(); it != end; ++it) {
					const KUrl &url = *it;

					if(url.protocol() != "file")
						continue;

					app()->openVideo(url);
					break;
				}
			}

			return true;            // eat event
		} else if(event->type() == QEvent::KeyPress) {
			// NOTE: when on full screen mode, the keyboard input is received but
			// for some reason it doesn't trigger the correct actions automatically
			// so we process the event and handle the issue ourselves.

			QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
			return app()->triggerAction(QKeySequence((keyEvent->modifiers() & ~Qt::KeypadModifier) + keyEvent->key()));
		} else if(event->type() == QEvent::MouseMove) {
			QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);
			if(mouseEvent->globalPos() != m_currentCursorPos) {
				m_currentCursorPos = mouseEvent->globalPos();
				if(m_layeredWidget->cursor().shape() == Qt::BlankCursor)
					m_layeredWidget->unsetCursor();
				if(m_fullScreenControls->isAttached())
					m_fullScreenControls->toggleVisible(true);
			}
		}
	} else if(object == m_infoControlsGroupBox || object->parent() == m_infoControlsGroupBox) {
		if(event->type() != QEvent::MouseButtonRelease)
			return QWidget::eventFilter(object, event);

		QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);

		if(mouseEvent->button() != Qt::RightButton)
			return QWidget::eventFilter(object, event);

		KMenu menu;
		QAction *action = menu.addAction(i18n("Show editable position control"));
		action->setCheckable(true);
		action->setChecked(app()->playerConfig()->showPositionTimeEdit());

		if(menu.exec(mouseEvent->globalPos()) == action)
			app()->playerConfig()->toggleShowPositionTimeEdit();

		return true;                    // eat event
	}

	return QWidget::eventFilter(object, event);
}