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diff --git a/examples/datavisualization/texturesurface/custominputhandler.cpp b/examples/datavisualization/texturesurface/custominputhandler.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2014 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 "custominputhandler.h"
+
+#include <QtDataVisualization/Q3DCamera>
+#include <QtCore/qmath.h>
+
+#include <QDebug>
+
+CustomInputHandler::CustomInputHandler(QAbstract3DGraph *graph, QObject *parent) :
+ Q3DInputHandler(parent),
+ m_highlight(0),
+ m_mousePressed(false),
+ m_state(StateNormal),
+ m_axisX(0),
+ m_axisZ(0),
+ m_speedModifier(20.0f)
+{
+ // Connect to the item selection signal from graph
+ connect(graph, &QAbstract3DGraph::selectedElementChanged, this,
+ &CustomInputHandler::handleElementSelected);
+}
+
+void CustomInputHandler::mousePressEvent(QMouseEvent *event, const QPoint &mousePos)
+{
+ if (Qt::LeftButton == event->button()) {
+ m_highlight->setVisible(false);
+ m_mousePressed = true;
+ }
+ Q3DInputHandler::mousePressEvent(event, mousePos);
+}
+
+void CustomInputHandler::wheelEvent(QWheelEvent *event)
+{
+ float delta = float(event->delta());
+
+ m_axisXMinValue += delta;
+ m_axisXMaxValue -= delta;
+ m_axisZMinValue += delta;
+ m_axisZMaxValue -= delta;
+ checkConstraints();
+
+ float y = (m_axisXMaxValue - m_axisXMinValue) * m_aspectRatio;
+
+ m_axisX->setRange(m_axisXMinValue, m_axisXMaxValue);
+ m_axisY->setRange(100.0f, y);
+ m_axisZ->setRange(m_axisZMinValue, m_axisZMaxValue);
+}
+
+void CustomInputHandler::mouseMoveEvent(QMouseEvent *event, const QPoint &mousePos)
+{
+ // Check if we're trying to drag axis label
+ if (m_mousePressed && m_state != StateNormal) {
+ setPreviousInputPos(inputPosition());
+ setInputPosition(mousePos);
+ handleAxisDragging();
+ } else {
+ Q3DInputHandler::mouseMoveEvent(event, mousePos);
+ }
+}
+
+void CustomInputHandler::mouseReleaseEvent(QMouseEvent *event, const QPoint &mousePos)
+{
+ Q3DInputHandler::mouseReleaseEvent(event, mousePos);
+ m_mousePressed = false;
+ m_state = StateNormal;
+}
+
+void CustomInputHandler::handleElementSelected(QAbstract3DGraph::ElementType type)
+{
+ switch (type) {
+ case QAbstract3DGraph::ElementAxisXLabel:
+ m_state = StateDraggingX;
+ break;
+ case QAbstract3DGraph::ElementAxisZLabel:
+ m_state = StateDraggingZ;
+ break;
+ default:
+ m_state = StateNormal;
+ break;
+ }
+}
+
+void CustomInputHandler::handleAxisDragging()
+{
+ float distance = 0.0f;
+
+ // Get scene orientation from active camera
+ float xRotation = scene()->activeCamera()->xRotation();
+
+ // Calculate directional drag multipliers based on rotation
+ float xMulX = qCos(qDegreesToRadians(xRotation));
+ float xMulY = qSin(qDegreesToRadians(xRotation));
+ float zMulX = qSin(qDegreesToRadians(xRotation));
+ float zMulY = qCos(qDegreesToRadians(xRotation));
+
+ // Get the drag amount
+ QPoint move = inputPosition() - previousInputPos();
+
+ // Adjust axes
+ switch (m_state) {
+ case StateDraggingX:
+ distance = (move.x() * xMulX - move.y() * xMulY) * m_speedModifier;
+ m_axisXMinValue -= distance;
+ m_axisXMaxValue -= distance;
+ if (m_axisXMinValue < m_areaMinValue) {
+ float dist = m_axisXMaxValue - m_axisXMinValue;
+ m_axisXMinValue = m_areaMinValue;
+ m_axisXMaxValue = m_axisXMinValue + dist;
+ }
+ if (m_axisXMaxValue > m_areaMaxValue) {
+ float dist = m_axisXMaxValue - m_axisXMinValue;
+ m_axisXMaxValue = m_areaMaxValue;
+ m_axisXMinValue = m_axisXMaxValue - dist;
+ }
+ m_axisX->setRange(m_axisXMinValue, m_axisXMaxValue);
+ break;
+ case StateDraggingZ:
+ distance = (move.x() * zMulX + move.y() * zMulY) * m_speedModifier;
+ m_axisZMinValue += distance;
+ m_axisZMaxValue += distance;
+ if (m_axisZMinValue < m_areaMinValue) {
+ float dist = m_axisZMaxValue - m_axisZMinValue;
+ m_axisZMinValue = m_areaMinValue;
+ m_axisZMaxValue = m_axisZMinValue + dist;
+ }
+ if (m_axisZMaxValue > m_areaMaxValue) {
+ float dist = m_axisZMaxValue - m_axisZMinValue;
+ m_axisZMaxValue = m_areaMaxValue;
+ m_axisZMinValue = m_axisZMaxValue - dist;
+ }
+ m_axisZ->setRange(m_axisZMinValue, m_axisZMaxValue);
+ break;
+ default:
+ break;
+ }
+}
+
+void CustomInputHandler::checkConstraints()
+{
+ if (m_axisXMinValue < m_areaMinValue)
+ m_axisXMinValue = m_areaMinValue;
+ if (m_axisXMaxValue > m_areaMaxValue)
+ m_axisXMaxValue = m_areaMaxValue;
+ // Don't allow too much zoom in
+ if ((m_axisXMaxValue - m_axisXMinValue) < m_axisXMinRange) {
+ float adjust = (m_axisXMinRange - (m_axisXMaxValue - m_axisXMinValue)) / 2.0f;
+ m_axisXMinValue -= adjust;
+ m_axisXMaxValue += adjust;
+ }
+
+ if (m_axisZMinValue < m_areaMinValue)
+ m_axisZMinValue = m_areaMinValue;
+ if (m_axisZMaxValue > m_areaMaxValue)
+ m_axisZMaxValue = m_areaMaxValue;
+ // Don't allow too much zoom in
+ if ((m_axisZMaxValue - m_axisZMinValue) < m_axisZMinRange) {
+ float adjust = (m_axisZMinRange - (m_axisZMaxValue - m_axisZMinValue)) / 2.0f;
+ m_axisZMinValue -= adjust;
+ m_axisZMaxValue += adjust;
+ }
+}