mirror of
https://bitbucket.org/librepilot/librepilot.git
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350 lines
8.7 KiB
C++
350 lines
8.7 KiB
C++
/**
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******************************************************************************
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*
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* @file mixercurvewidget.cpp
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
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* @addtogroup GCSPlugins GCS Plugins
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* @{
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* @addtogroup UAVObjectWidgetUtils Plugin
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* @{
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* @brief Utility plugin for UAVObject to Widget relation management
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*****************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "mixercurvewidget.h"
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#include "mixercurveline.h"
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#include "mixercurvepoint.h"
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#include <QObject>
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#include <QtGui>
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#include <QDebug>
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/*
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* Initialize the widget
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*/
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MixerCurveWidget::MixerCurveWidget(QWidget *parent) :
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QGraphicsView(parent), m_xAxisTextItem(0), m_yAxisTextItem(0)
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{
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// Create a layout, add a QGraphicsView and put the SVG inside.
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// The Mixer Curve widget looks like this:
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// |--------------------|
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// | |
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// | |
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// | Graph |
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// | |
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// | |
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// | |
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// |--------------------|
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setRenderHint(QPainter::Antialiasing);
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m_curveMin = 0.0;
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m_curveMax = 1.0;
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setFrameStyle(QFrame::NoFrame);
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setStyleSheet("background:transparent");
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setRenderHint(QPainter::HighQualityAntialiasing, true);
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QGraphicsScene *scene = new QGraphicsScene(this);
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QSvgRenderer *renderer = new QSvgRenderer();
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m_plot = new QGraphicsSvgItem();
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renderer->load(QString(":/uavobjectwidgetutils/images/curve-bg.svg"));
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m_plot->setSharedRenderer(renderer);
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scene->addItem(m_plot);
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m_plot->setZValue(-1);
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scene->setSceneRect(m_plot->boundingRect());
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setScene(scene);
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setupXAxisLabel();
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setupYAxisLabel();
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initNodes(MixerCurveWidget::NODE_NUMELEM);
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}
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MixerCurveWidget::~MixerCurveWidget()
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{
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while (!m_nodeList.isEmpty()) {
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delete m_nodeList.takeFirst();
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}
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while (!m_edgeList.isEmpty()) {
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delete m_edgeList.takeFirst();
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}
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if (m_xAxisTextItem) {
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delete m_xAxisTextItem;
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m_xAxisTextItem = NULL;
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}
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if (m_yAxisTextItem) {
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delete m_yAxisTextItem;
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m_yAxisTextItem = NULL;
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}
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}
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void MixerCurveWidget::setPositiveColor(QString color)
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{
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for (int i = 0; i < m_nodeList.count(); i++) {
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MixerNode *node = m_nodeList.at(i);
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node->setPositiveColor(color);
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}
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}
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void MixerCurveWidget::setNegativeColor(QString color)
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{
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for (int i = 0; i < m_nodeList.count(); i++) {
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MixerNode *node = m_nodeList.at(i);
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node->setNegativeColor(color);
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}
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}
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/**
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Init curve: create a (flat) curve with a specified number of points.
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If a curve exists already, resets it.
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Points should be between 0 and 1.
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*/
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void MixerCurveWidget::initCurve(const QList<double> *points)
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{
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if (points->length() < 2) {
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return; // We need at least 2 points on a curve!
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}
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// finally, set node positions
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setCurve(points);
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}
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void MixerCurveWidget::initNodes(int numPoints)
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{
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// First of all, clear any existing list
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if (m_nodeList.count()) {
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foreach(MixerNode * node, m_nodeList) {
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foreach(Edge * edge, node->edges()) {
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if (edge->sourceNode() == node) {
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scene()->removeItem(edge);
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delete edge;
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}
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}
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scene()->removeItem(node);
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delete node;
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}
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m_nodeList.clear();
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}
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// Create the nodes and edges
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MixerNode *prevNode = 0;
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for (int i = 0; i < numPoints; i++) {
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MixerNode *node = new MixerNode(this, m_plot);
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m_nodeList.append(node);
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scene()->addItem(node);
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node->setPos(0, 0);
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if (prevNode) {
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scene()->addItem(new Edge(prevNode, node));
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}
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prevNode = node;
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}
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}
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void MixerCurveWidget::setupXAxisLabel()
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{
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if (!m_xAxisString.isEmpty()) {
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if (m_xAxisTextItem) {
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m_xAxisTextItem->setPlainText(m_xAxisString);
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} else {
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m_xAxisTextItem = new QGraphicsTextItem(m_xAxisString, m_plot);
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scene()->addItem(m_xAxisTextItem);
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}
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}
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}
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void MixerCurveWidget::setupYAxisLabel()
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{
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if (!m_yAxisString.isEmpty()) {
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if (m_yAxisTextItem) {
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m_yAxisTextItem->setPlainText(m_yAxisString);
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} else {
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m_yAxisTextItem = new QGraphicsTextItem(m_yAxisString, m_plot);
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m_yAxisTextItem->setRotation(270);
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scene()->addItem(m_yAxisTextItem);
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}
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}
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}
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/**
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Returns the current curve settings
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*/
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QList<double> MixerCurveWidget::getCurve()
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{
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QList<double> list;
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foreach(MixerNode * node, m_nodeList) {
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list.append(node->value());
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}
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return list;
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}
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/**
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Sets a linear graph
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*/
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void MixerCurveWidget::initLinearCurve(int numPoints, double maxValue, double minValue)
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{
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double range = maxValue - minValue; // setRange(minValue, maxValue);
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QList<double> points;
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for (double i = 0; i < (double)numPoints; i++) {
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double val = (range * (i / (double)(numPoints - 1))) + minValue;
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points.append(val);
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}
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initCurve(&points);
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}
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/**
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Setd the current curve settings
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*/
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void MixerCurveWidget::setCurve(const QList<double> *points)
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{
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m_curveUpdating = true;
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int ptCnt = points->count();
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if (m_nodeList.count() != ptCnt) {
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initNodes(ptCnt);
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}
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double range = m_curveMax - m_curveMin;
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qreal w = m_plot->boundingRect().width() / (ptCnt - 1);
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qreal h = m_plot->boundingRect().height();
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for (int i = 0; i < ptCnt; i++) {
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double val = (points->at(i) < m_curveMin) ? m_curveMin : (points->at(i) > m_curveMax) ? m_curveMax : points->at(i);
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val += range;
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val -= (m_curveMin + range);
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val /= range;
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MixerNode *node = m_nodeList.at(i);
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node->setPos(w * i, h - (val * h));
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node->verticalMove(true);
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node->update();
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}
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m_curveUpdating = false;
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update();
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emit curveUpdated();
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}
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void MixerCurveWidget::showEvent(QShowEvent *event)
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{
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Q_UNUSED(event)
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positionAxisLabels();
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setSceneRect(scene()->itemsBoundingRect());
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fitInView(scene()->itemsBoundingRect(), Qt::KeepAspectRatio);
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}
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void MixerCurveWidget::resizeEvent(QResizeEvent *event)
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{
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Q_UNUSED(event);
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positionAxisLabels();
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setSceneRect(scene()->itemsBoundingRect());
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fitInView(scene()->itemsBoundingRect(), Qt::KeepAspectRatio);
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}
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void MixerCurveWidget::changeEvent(QEvent *event)
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{
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QGraphicsView::changeEvent(event);
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if (event->type() == QEvent::EnabledChange) {
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foreach(MixerNode * node, m_nodeList) {
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node->update();
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}
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}
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}
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void MixerCurveWidget::positionAxisLabels()
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{
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QRectF rect = m_plot->boundingRect();
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if (m_xAxisTextItem) {
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m_xAxisTextItem->setPos(rect.right() -
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m_xAxisTextItem->boundingRect().width(), rect.bottom() - 4);
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}
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if (m_yAxisTextItem) {
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m_yAxisTextItem->setPos(rect.left() -
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m_yAxisTextItem->boundingRect().height(), m_yAxisTextItem->boundingRect().width());
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}
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}
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void MixerCurveWidget::itemMoved(double itemValue)
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{
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Q_UNUSED(itemValue);
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if (!m_curveUpdating) {
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emit curveUpdated();
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}
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}
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void MixerCurveWidget::setMin(double value)
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{
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if (m_curveMin != value) {
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emit curveMinChanged(value);
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}
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m_curveMin = value;
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}
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void MixerCurveWidget::setMax(double value)
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{
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if (m_curveMax != value) {
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emit curveMaxChanged(value);
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}
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m_curveMax = value;
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}
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double MixerCurveWidget::getMin()
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{
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return m_curveMin;
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}
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double MixerCurveWidget::getMax()
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{
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return m_curveMax;
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}
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double MixerCurveWidget::setRange(double min, double max)
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{
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m_curveMin = min;
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m_curveMax = max;
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return m_curveMax - m_curveMin;
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}
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void MixerCurveWidget::setXAxisLabel(QString label)
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{
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m_xAxisString = label;
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setupXAxisLabel();
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}
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void MixerCurveWidget::setYAxisLabel(QString label)
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{
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m_yAxisString = label;
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setupYAxisLabel();
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}
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