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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.h"
#include "q3dlight.h"
QT_DATAVISUALIZATION_BEGIN_NAMESPACE
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 qreal rotationSpeed = 100.0;
Q3DInputHandler::Q3DInputHandler(QObject *parent) :
QAbstract3DInputHandler(parent)
{
}
Q3DInputHandler::~Q3DInputHandler()
{
}
// Input event listeners
void Q3DInputHandler::mousePressEvent(QMouseEvent *event, const QPoint &mousePos)
{
if (Qt::LeftButton == event->button()) {
if (scene()->isSlicingActivated()) {
if (scene()->isInputInsideMainView(mousePos)) {
setInputState(QDataVis::InputOnOverview);
//qDebug() << "Mouse pressed on overview";
} else if (scene()->isInputInsideSliceView(mousePos)) {
setInputState(QDataVis::InputOnSlice);
//qDebug() << "Mouse pressed on zoom";
} else {
setInputState(QDataVis::InputNone);
}
} else {
setInputState(QDataVis::InputOnScene);
// update mouse positions to prevent jumping when releasing or repressing a button
setInputPosition(mousePos);
emit selectionAtPoint(mousePos);
//qDebug() << "Mouse pressed on scene";
}
} 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()->isSlicingActivated())
setInputState(QDataVis::InputRotating);
// update mouse positions to prevent jumping when releasing or repressing a button
setInputPosition(mousePos);
}
}
void Q3DInputHandler::mouseReleaseEvent(QMouseEvent *event, const QPoint &mousePos)
{
Q_UNUSED(event);
if (QDataVis::InputRotating == inputState()) {
// update mouse positions to prevent jumping when releasing or repressing a button
setInputPosition(mousePos);
}
setInputState(QDataVis::InputNone);
}
void Q3DInputHandler::mouseMoveEvent(QMouseEvent *event, const QPoint &mousePos)
{
Q_UNUSED(event);
if (QDataVis::InputRotating == inputState()) {
// Calculate mouse movement since last frame
QPointF rotations = scene()->camera()->rotations();
GLfloat xRotation = rotations.x();
GLfloat yRotation = rotations.y();
GLfloat mouseMoveX = GLfloat(inputPosition().x() - mousePos.x())
/ (scene()->viewport().width() / rotationSpeed);
GLfloat mouseMoveY = GLfloat(inputPosition().y() - mousePos.y())
/ (scene()->viewport().height() / rotationSpeed);
// Apply to rotations
xRotation -= mouseMoveX;
yRotation -= mouseMoveY;
scene()->camera()->setRotations(QPointF(xRotation, yRotation));
scene()->camera()->updateViewMatrix(1.0f);
setPreviousInputPos(inputPosition());
setInputPosition(mousePos);
}
}
void Q3DInputHandler::wheelEvent(QWheelEvent *event)
{
// disable zooming if in slice view
if (scene()->isSlicingActivated())
return;
// Adjust zoom level based on what zoom range we're in.
int zoomLevel = scene()->camera()->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()->camera()->setZoomLevel(zoomLevel);
}
QT_DATAVISUALIZATION_END_NAMESPACE
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