45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
#include "MouseEventSpy.h"
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#include <QEvent>
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#include <QGuiApplication>
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#include <QDebug>
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MouseEventSpy::MouseEventSpy(QObject *parent) : QObject(parent)
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{
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qDebug() << "created Instance";
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}
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/**
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* Implements the SINGLETON PATTERN
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*/
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MouseEventSpy* MouseEventSpy::instance()
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{
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static MouseEventSpy* inst;
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if (inst == nullptr)
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{
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// If no instance has been created yet, create a new and install it as event filter.
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// Uppon first use of the instance, it will automatically
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// install itself in the QGuiApplication
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inst = new MouseEventSpy();
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QGuiApplication* app = qGuiApp;
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app->installEventFilter(inst);
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}
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return inst;
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}
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/**
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* This is the method is necessary for 'installEventFilter'
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*/
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bool MouseEventSpy::eventFilter(QObject* watched, QEvent* event)
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{
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QEvent::Type t = event->type();
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if ((t == QEvent::MouseButtonDblClick
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|| t == QEvent::MouseButtonPress
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|| t == QEvent::MouseButtonRelease
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|| t == QEvent::MouseMove)
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&& event->spontaneous() // Take only mouse events from outside of Qt
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)
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emit mouseEventDetected();
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qDebug("MouseEvent detected.");
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return QObject::eventFilter(watched, event);
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}
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