mouseeventhandler.cpp
97 lines
| 2.2 KiB
| text/x-c
|
CppLexer
|
r2183 | /**************************************************************************** | ||
** | ||||
** Copyright (C) 2012 Digia Plc | ||||
** All rights reserved. | ||||
** For any questions to Digia, please use contact form at http://qt.digia.com | ||||
** | ||||
** This file is part of the Qt Commercial Charts Add-on. | ||||
** | ||||
** $QT_BEGIN_LICENSE$ | ||||
** Licensees holding valid Qt Commercial licenses may use this file in | ||||
** accordance with the Qt Commercial License Agreement provided with the | ||||
** Software or, alternatively, in accordance with the terms contained in | ||||
** a written agreement between you and Digia. | ||||
** | ||||
** If you have questions regarding the use of this file, please use | ||||
** contact form at http://qt.digia.com | ||||
** $QT_END_LICENSE$ | ||||
** | ||||
****************************************************************************/ | ||||
#include "mouseeventhandler_p.h" | ||||
#include <QGraphicsSceneMouseEvent> | ||||
QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
MouseEventHandler::MouseEventHandler() : | ||||
m_pressedPos(0,0), | ||||
m_state(Idle), | ||||
m_treshold(10) | ||||
{ | ||||
} | ||||
MouseEventHandler::~MouseEventHandler() | ||||
{ | ||||
} | ||||
void MouseEventHandler::setMoveTreshold(qreal treshold) | ||||
{ | ||||
m_treshold = treshold; | ||||
} | ||||
void MouseEventHandler::handleMousePressEvent(QGraphicsSceneMouseEvent* event) | ||||
{ | ||||
m_pressedPos = event->pos(); | ||||
m_state = Pressed; | ||||
} | ||||
void MouseEventHandler::handleMouseMoveEvent(QGraphicsSceneMouseEvent* event) | ||||
{ | ||||
QPointF delta = event->pos() - m_pressedPos; | ||||
switch (m_state) { | ||||
case Pressed: { | ||||
// calculate treshold. If enough, change to move state and send out move deltas. | ||||
if (qAbs(delta.x()) > m_treshold || qAbs(delta.y()) > m_treshold) { | ||||
m_state = Moved; | ||||
mouseMoved(delta); | ||||
} | ||||
break; | ||||
} | ||||
case Moved: { | ||||
mouseMoved(delta); | ||||
break; | ||||
} | ||||
case Idle: | ||||
default: { | ||||
break; | ||||
} | ||||
} | ||||
} | ||||
void MouseEventHandler::handleMouseReleaseEvent(QGraphicsSceneMouseEvent* event) | ||||
{ | ||||
QPointF delta = event->pos() - m_pressedPos; | ||||
switch (m_state) { | ||||
case Pressed: | ||||
{ | ||||
m_state = Idle; | ||||
mouseClicked(); | ||||
break; | ||||
} | ||||
case Moved: | ||||
{ | ||||
m_state = Idle; | ||||
mouseReleased(delta); | ||||
break; | ||||
} | ||||
default: | ||||
{ | ||||
m_state = Idle; | ||||
break; | ||||
} | ||||
} | ||||
} | ||||
QTCOMMERCIALCHART_END_NAMESPACE | ||||