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/****************************************************************************
**
** Copyright (C) 2013 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 QtDataVisualization module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise 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
**
****************************************************************************/
#include "datavisualizationglobal_p.h"
#include "q3dinputhandler.h"
#include "q3dcamera_p.h"
#include "q3dlight.h"
QT_BEGIN_NAMESPACE_DATAVISUALIZATION
const int minZoomLevel = 10;
const int halfSizeZoomLevel = 50;
const int oneToOneZoomLevel = 100;
const int maxZoomLevel = 500;
const int nearZoomRangeDivider = 12;
const int midZoomRangeDivider = 60;
const int farZoomRangeDivider = 120;
const float rotationSpeed = 100.0f;
/*!
* \class Q3DInputHandler
* \inmodule QtDataVisualization
* \brief Basic wheel mouse based input handler.
* \since Qt Data Visualization 1.0
*
* Q3DInputHandler is the basic input handler for wheel mouse type of input devices.
*
* Default input handler has the following functionalty:
* \table
* \header
* \li Mouse action \li Action
* \row
* \li Drag with right button pressed \li Rotate graph within limits set for Q3DCamera.
* \row
* \li Left click \li Select item under cursor or remove selection if none.
* May open the secondary view depending on the
* selection mode.
* \row
* \li Mouse wheel \li Zoom in/out within default range (10...500%).
* \row
* \li Left click on the primary view when the secondary view is visible
* \li Closes the secondary view.
* \note Secondary view is available only for Q3DBars and Q3DSurface graphs.
* \endtable
*/
/*!
* Constructs the basic mouse input handler. An optional \a parent parameter can be given
* and is then passed to QObject constructor.
*/
Q3DInputHandler::Q3DInputHandler(QObject *parent) :
QAbstract3DInputHandler(parent)
{
}
/*!
* Destroys the input handler.
*/
Q3DInputHandler::~Q3DInputHandler()
{
}
// Input event listeners
/*!
* Override this to change handling of mouse press events.
* Mouse press event is given in the \a event and the mouse position in \a mousePos.
*/
void Q3DInputHandler::mousePressEvent(QMouseEvent *event, const QPoint &mousePos)
{
#if defined(Q_OS_ANDROID)
Q_UNUSED(event);
Q_UNUSED(mousePos);
#else
if (Qt::LeftButton == event->button()) {
if (scene()->isSlicingActive()) {
if (scene()->isPointInPrimarySubView(mousePos)) {
setInputState(InputStateOnPrimaryView);
} else if (scene()->isPointInSecondarySubView(mousePos)) {
setInputState(InputStateOnSecondaryView);
} else {
setInputState(InputStateNone);
}
} else {
setInputState(InputStateOnScene);
// update mouse positions to prevent jumping when releasing or repressing a button
setInputPosition(mousePos);
scene()->setSelectionQueryPosition(mousePos);
}
} else if (Qt::MiddleButton == event->button()) {
// reset rotations
setInputPosition(QPoint(0, 0));
} else if (Qt::RightButton == event->button()) {
// disable rotating when in slice view
if (!scene()->isSlicingActive())
setInputState(InputStateRotating);
// update mouse positions to prevent jumping when releasing or repressing a button
setInputPosition(mousePos);
}
#endif
}
/*!
* Override this to change handling of mouse release events.
* Mouse release event is given in the \a event and the mouse position in \a mousePos.
*/
void Q3DInputHandler::mouseReleaseEvent(QMouseEvent *event, const QPoint &mousePos)
{
Q_UNUSED(event);
#if defined (Q_OS_ANDROID)
Q_UNUSED(mousePos);
#else
if (InputStateRotating == inputState()) {
// update mouse positions to prevent jumping when releasing or repressing a button
setInputPosition(mousePos);
}
setInputState(InputStateNone);
#endif
}
/*!
* Override this to change handling of mouse move events.
* Mouse move event is given in the \a event and the mouse position in \a mousePos.
*/
void Q3DInputHandler::mouseMoveEvent(QMouseEvent *event, const QPoint &mousePos)
{
Q_UNUSED(event);
#if defined (Q_OS_ANDROID)
Q_UNUSED(mousePos);
#else
if (InputStateRotating == inputState()) {
// Calculate mouse movement since last frame
float xRotation = scene()->activeCamera()->xRotation();
float yRotation = scene()->activeCamera()->yRotation();
float mouseMoveX = float(inputPosition().x() - mousePos.x())
/ (scene()->viewport().width() / rotationSpeed);
float mouseMoveY = float(inputPosition().y() - mousePos.y())
/ (scene()->viewport().height() / rotationSpeed);
// Apply to rotations
xRotation -= mouseMoveX;
yRotation -= mouseMoveY;
scene()->activeCamera()->setXRotation(xRotation);
scene()->activeCamera()->setYRotation(yRotation);
setPreviousInputPos(inputPosition());
setInputPosition(mousePos);
}
#endif
}
/*!
* Override this to change handling of wheel events.
* The wheel event is given in the \a event.
*/
void Q3DInputHandler::wheelEvent(QWheelEvent *event)
{
// disable zooming if in slice view
if (scene()->isSlicingActive())
return;
// Adjust zoom level based on what zoom range we're in.
int zoomLevel = scene()->activeCamera()->zoomLevel();
if (zoomLevel > oneToOneZoomLevel)
zoomLevel += event->angleDelta().y() / nearZoomRangeDivider;
else if (zoomLevel > halfSizeZoomLevel)
zoomLevel += event->angleDelta().y() / midZoomRangeDivider;
else
zoomLevel += event->angleDelta().y() / farZoomRangeDivider;
if (zoomLevel > maxZoomLevel)
zoomLevel = maxZoomLevel;
else if (zoomLevel < minZoomLevel)
zoomLevel = minZoomLevel;
scene()->activeCamera()->setZoomLevel(zoomLevel);
}
QT_END_NAMESPACE_DATAVISUALIZATION
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