| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt Data Visualization module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
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| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 3 or (at your option) any later version |
| ** approved by the KDE Free Qt Foundation. The licenses are as published by |
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
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| ****************************************************************************/ |
| |
| #include "custominputhandler.h" |
| |
| #include <QtDataVisualization/Q3DCamera> |
| #include <QtCore/qmath.h> |
| |
| 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); |
| } |
| |
| //! [1] |
| void CustomInputHandler::wheelEvent(QWheelEvent *event) |
| { |
| float delta = float(event->angleDelta().y()); |
| |
| 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); |
| } |
| //! [1] |
| |
| 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) { |
| //! [0] |
| 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; |
| //! [0] |
| 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() |
| { |
| //! [2] |
| 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; |
| } |
| //! [2] |
| |
| 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; |
| } |
| } |