131 lines
2.8 KiB
C++
131 lines
2.8 KiB
C++
#include "InteractionMode.h"
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#include <QtCore/QCoreApplication>
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#include <QtGui/QKeyEvent>
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#include <QtGui/QFocusEvent>
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#include <Quarter/QuarterWidget.h>
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/*
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Adjust how QuarterWidget reacts to alt key events
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*/
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using namespace SIM::Coin3D::Quarter;
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InteractionMode::InteractionMode(QuarterWidget * quarterwidget)
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: QObject(quarterwidget)
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{
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this->quarterwidget = quarterwidget;
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this->altkeydown = false;
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this->prevcursor = QCursor();
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this->prevnavstate =
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this->quarterwidget->getSoEventManager()->getNavigationState();
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this->isenabled = true;
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}
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InteractionMode::~InteractionMode()
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{
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}
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void
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InteractionMode::setEnabled(bool yes)
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{
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this->isenabled = yes;
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}
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bool
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InteractionMode::enabled(void) const
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{
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return this->isenabled;
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}
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void
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InteractionMode::setOn(bool on)
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{
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if (!this->isenabled) {
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return;
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}
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SoEventManager * eventmanager = this->quarterwidget->getSoEventManager();
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if (on) {
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this->altkeydown = true;
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this->prevnavstate = eventmanager->getNavigationState();
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this->prevcursor = this->quarterwidget->cursor();
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this->quarterwidget->setCursor(this->quarterwidget->stateCursor("interact"));
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eventmanager->setNavigationState(SoEventManager::NO_NAVIGATION);
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} else {
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this->altkeydown = false;
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this->quarterwidget->setCursor(this->prevcursor);
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eventmanager->setNavigationState(this->prevnavstate);
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}
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}
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bool
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InteractionMode::on(void) const
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{
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return this->altkeydown;
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}
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bool
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InteractionMode::eventFilter(QObject * obj, QEvent * event)
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{
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if (!this->isenabled) {
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return false;
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}
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assert(obj == this->quarterwidget);
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switch (event->type()) {
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case QEvent::KeyPress:
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return this->keyPressEvent(dynamic_cast<QKeyEvent *>(event));
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case QEvent::KeyRelease:
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return this->keyReleaseEvent(dynamic_cast<QKeyEvent *>(event));
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case QEvent::FocusOut:
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return this->focusOutEvent(dynamic_cast<QFocusEvent *>(event));
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default:
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return QObject::eventFilter(obj, event);
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}
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}
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/*
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when alt is pressed, override navigation and allow scenegraph to
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process events so draggers and manipulators works
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*/
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bool
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InteractionMode::keyPressEvent(QKeyEvent * event)
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{
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if (!event ||
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!(event->key() == Qt::Key_Alt) ||
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!(event->modifiers() & Qt::AltModifier)) {
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return false;
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}
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this->setOn(true);
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return true;
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}
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bool
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InteractionMode::keyReleaseEvent(QKeyEvent * event)
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{
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if (!event || !(event->key() == Qt::Key_Alt)) {
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return false;
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}
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this->setOn(false);
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return true;
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}
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/*
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if we lose focus while alt is down, send an alt-release event
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*/
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bool
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InteractionMode::focusOutEvent(QFocusEvent * event)
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{
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if (this->altkeydown) {
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QKeyEvent keyevent(QEvent::KeyRelease, Qt::Key_Alt, Qt::NoModifier);
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return QCoreApplication::sendEvent(this->quarterwidget, &keyevent);
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}
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return false;
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}
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