#ifndef QTAH_EVENT_HPP
#define QTAH_EVENT_HPP
// This file is part of Qtah.
//
// Copyright 2015-2021 The Qtah Authors.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see .
#include
#include
#include
#include
#include
#include
#include "b_callback.hpp"
namespace qtah {
namespace event {
class EventListener : public QObject {
Q_OBJECT
public:
EventListener(
QObject *parent,
CallbackPtrQObjectPtrQEventBool eventCallback,
CallbackVoid deletedCallback) :
QObject(parent),
eventCallback_(eventCallback),
deletedCallback_(deletedCallback),
notifyDeleted_(true) {
parent->installEventFilter(this);
}
~EventListener() {
parent()->removeEventFilter(this);
if (notifyDeleted_) {
deletedCallback_();
}
}
virtual bool eventFilter(QObject* receiver, QEvent* event) {
return eventCallback_(receiver, event);
}
void doNotNotifyOnDelete() {
notifyDeleted_ = false;
}
private:
CallbackPtrQObjectPtrQEventBool eventCallback_;
CallbackVoid deletedCallback_;
bool notifyDeleted_;
};
class SceneEventListener : public QGraphicsItem {
public:
SceneEventListener(
QGraphicsItem *parent,
CallbackPtrQGraphicsItemPtrQEventBool eventCallback,
CallbackVoid deletedCallback) :
QGraphicsItem(parent),
eventCallback_(eventCallback),
deletedCallback_(deletedCallback),
notifyDeleted_(true) {
parent->installSceneEventFilter(this);
}
~SceneEventListener() {
parentItem()->removeSceneEventFilter(this);
if (notifyDeleted_) {
deletedCallback_();
}
}
virtual bool sceneEventFilter(QGraphicsItem* receiver, QEvent* event) {
return eventCallback_(receiver, event);
}
void doNotNotifyOnDelete() {
notifyDeleted_ = false;
}
virtual QRectF boundingRect() const { return QRectF(); }
virtual void paint(QPainter*, const QStyleOptionGraphicsItem*, QWidget* = 0) { return; }
private:
CallbackPtrQGraphicsItemPtrQEventBool eventCallback_;
CallbackVoid deletedCallback_;
bool notifyDeleted_;
};
} // namespace event
} // namespace qtah
#endif // QTAH_EVENT_HPP