217 lines
7.1 KiB
C++
217 lines
7.1 KiB
C++
/*
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Copyright 2011 Marco Martin <notmart@gmail.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "mouseeventlistener.h"
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#include <QApplication>
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#include <QEvent>
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#include <QGraphicsSceneMouseEvent>
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#include <QtCore/QTimer>
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#include <KDebug>
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static const int PressAndHoldDelay = 800;
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MouseEventListener::MouseEventListener(QDeclarativeItem *parent)
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: QDeclarativeItem(parent),
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m_pressed(false),
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m_pressAndHoldEvent(0),
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m_lastEvent(0),
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m_containsMouse(false)
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{
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m_pressAndHoldTimer = new QTimer(this);
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m_pressAndHoldTimer->setSingleShot(true);
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connect(m_pressAndHoldTimer, SIGNAL(timeout()),
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this, SLOT(handlePressAndHold()));
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qmlRegisterType<KDeclarativeMouseEvent>();
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qmlRegisterType<KDeclarativeWheelEvent>();
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setFiltersChildEvents(true);
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setAcceptedMouseButtons(Qt::LeftButton|Qt::RightButton|Qt::MidButton|Qt::XButton1|Qt::XButton2);
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}
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MouseEventListener::~MouseEventListener()
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{
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}
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void MouseEventListener::setHoverEnabled(bool enable)
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{
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if (enable == acceptHoverEvents()) {
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return;
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}
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setAcceptHoverEvents(enable);
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emit hoverEnabledChanged(enable);
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}
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bool MouseEventListener::hoverEnabled() const
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{
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return acceptHoverEvents();
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}
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void MouseEventListener::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
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{
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Q_UNUSED(event);
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m_containsMouse = true;
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emit containsMouseChanged(true);
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}
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void MouseEventListener::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
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{
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Q_UNUSED(event);
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m_containsMouse = false;
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emit containsMouseChanged(false);
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}
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bool MouseEventListener::containsMouse() const
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{
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return m_containsMouse;
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}
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void MouseEventListener::mousePressEvent(QGraphicsSceneMouseEvent *me)
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{
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if (m_lastEvent == me) {
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return;
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}
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//FIXME: when a popup window is visible: a click anywhere hides it: but the old qgraphicswidget will continue to think it's under the mouse
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//doesn't seem to be any good way to properly reset this.
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//this msolution will still caused a missed click after the popup is gone, but gets the situation unblocked.
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if (!isUnderMouse()) {
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me->ignore();
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return;
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}
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KDeclarativeMouseEvent dme(me->pos().x(), me->pos().y(), me->screenPos().x(), me->screenPos().y(), me->button(), me->buttons(), me->modifiers());
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m_pressAndHoldEvent = new KDeclarativeMouseEvent(me->pos().x(), me->pos().y(), me->screenPos().x(), me->screenPos().y(), me->button(), me->buttons(), me->modifiers());
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emit pressed(&dme);
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m_pressed = true;
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m_pressAndHoldTimer->start(PressAndHoldDelay);
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}
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void MouseEventListener::mouseMoveEvent(QGraphicsSceneMouseEvent *me)
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{
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if (m_lastEvent == me) {
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return;
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}
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KDeclarativeMouseEvent dme(me->pos().x(), me->pos().y(), me->screenPos().x(), me->screenPos().y(), me->button(), me->buttons(), me->modifiers());
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emit positionChanged(&dme);
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}
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void MouseEventListener::mouseReleaseEvent(QGraphicsSceneMouseEvent *me)
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{
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if (m_lastEvent == me) {
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return;
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}
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KDeclarativeMouseEvent dme(me->pos().x(), me->pos().y(), me->screenPos().x(), me->screenPos().y(), me->button(), me->buttons(), me->modifiers());
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m_pressed = false;
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emit released(&dme);
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if (QPointF(me->pos() - me->buttonDownPos(me->button())).manhattanLength() <= QApplication::startDragDistance() && m_pressAndHoldTimer->isActive()) {
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emit clicked(&dme);
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m_pressAndHoldTimer->stop();
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}
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}
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void MouseEventListener::wheelEvent(QGraphicsSceneWheelEvent *we)
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{
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if (m_lastEvent == we) {
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return;
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}
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KDeclarativeWheelEvent dwe(we->pos(), we->screenPos(), we->delta(), we->buttons(), we->modifiers(), we->orientation());
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emit wheelMoved(&dwe);
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}
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void MouseEventListener::handlePressAndHold()
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{
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if (m_pressed) {
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emit pressAndHold(m_pressAndHoldEvent);
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//delete m_pressAndHoldEvent;
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}
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}
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bool MouseEventListener::sceneEventFilter(QGraphicsItem *item, QEvent *event)
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{
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if (!isEnabled()) {
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return false;
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}
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m_lastEvent = event;
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switch (event->type()) {
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case QEvent::GraphicsSceneMousePress: {
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QGraphicsSceneMouseEvent *me = static_cast<QGraphicsSceneMouseEvent *>(event);
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//the parent will receive events in its own coordinates
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const QPointF myPos = item->mapToItem(this, me->pos());
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KDeclarativeMouseEvent dme(myPos.x(), myPos.y(), me->screenPos().x(), me->screenPos().y(), me->button(), me->buttons(), me->modifiers());
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m_pressAndHoldEvent = new KDeclarativeMouseEvent(myPos.x(), myPos.y(), me->screenPos().x(), me->screenPos().y(), me->button(), me->buttons(), me->modifiers());
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//kDebug() << "pressed in sceneEventFilter";
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emit pressed(&dme);
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m_pressed = true;
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m_pressAndHoldTimer->start(PressAndHoldDelay);
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break;
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}
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case QEvent::GraphicsSceneMouseMove: {
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QGraphicsSceneMouseEvent *me = static_cast<QGraphicsSceneMouseEvent *>(event);
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const QPointF myPos = item->mapToItem(this, me->pos());
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KDeclarativeMouseEvent dme(myPos.x(), myPos.y(), me->screenPos().x(), me->screenPos().y(), me->button(), me->buttons(), me->modifiers());
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//kDebug() << "positionChanged..." << dme.x() << dme.y();
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m_pressAndHoldEvent = new KDeclarativeMouseEvent(myPos.x(), myPos.y(), me->screenPos().x(), me->screenPos().y(), me->button(), me->buttons(), me->modifiers());
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emit positionChanged(&dme);
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break;
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}
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case QEvent::GraphicsSceneMouseRelease: {
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QGraphicsSceneMouseEvent *me = static_cast<QGraphicsSceneMouseEvent *>(event);
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const QPointF myPos = item->mapToItem(this, me->pos());
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KDeclarativeMouseEvent dme(myPos.x(), myPos.y(), me->screenPos().x(), me->screenPos().y(), me->button(), me->buttons(), me->modifiers());
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m_pressed = false;
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emit released(&dme);
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if (QPointF(me->pos() - me->buttonDownPos(me->button())).manhattanLength() <= QApplication::startDragDistance() && m_pressAndHoldTimer->isActive()) {
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emit clicked(&dme);
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m_pressAndHoldTimer->stop();
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}
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break;
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}
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case QEvent::GraphicsSceneWheel: {
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QGraphicsSceneWheelEvent *we = static_cast<QGraphicsSceneWheelEvent *>(event);
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KDeclarativeWheelEvent dwe(we->pos(), we->screenPos(), we->delta(), we->buttons(), we->modifiers(), we->orientation());
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emit wheelMoved(&dwe);
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break;
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}
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default:
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break;
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}
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return QDeclarativeItem::sceneEventFilter(item, event);
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}
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#include "mouseeventlistener.moc"
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