##// END OF EJS Templates
Optimize polar chart radius calculation a bit....
Optimize polar chart radius calculation a bit. Current algorithm still results in an occasional extra unneeded iteration, as it uses only crude approximation for radius reduction. However, any speedup gained by accurately calculating needed reduction would be very minor compared to approximations used, so it doesn't seem worth the effort to figure out the complex math. Change-Id: If670a1b058a85cd0305b93f62e6388b463bafd0d Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

File last commit:

r2506:59c477efbea1
r2542:189023d9a551
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declarativechart.h
229 lines | 8.3 KiB | text/x-c | CLexer
/****************************************************************************
**
** 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 Qt Commercial Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial 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
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef DECLARATIVECHART_H
#define DECLARATIVECHART_H
#include <QtCore/QtGlobal>
#include "shared_defines.h"
#ifdef CHARTS_FOR_QUICK2
#include <QtQuick/QQuickItem>
#include <QtQuick/QQuickPaintedItem>
#include <QtWidgets/QGraphicsScene>
#include <QtCore/QMutex>
#else
#include <QtDeclarative/QDeclarativeItem>
#endif
#include "qchart.h"
QTCOMMERCIALCHART_BEGIN_NAMESPACE
class DeclarativeMargins;
class Domain;
class DeclarativeAxes;
class DeclarativeChart : public QDECLARATIVE_PAINTED_ITEM
{
Q_OBJECT
Q_PROPERTY(Theme theme READ theme WRITE setTheme)
Q_PROPERTY(Animation animationOptions READ animationOptions WRITE setAnimationOptions)
Q_PROPERTY(QString title READ title WRITE setTitle)
Q_PROPERTY(QFont titleFont READ titleFont WRITE setTitleFont)
Q_PROPERTY(QColor titleColor READ titleColor WRITE setTitleColor NOTIFY titleColorChanged)
Q_PROPERTY(QLegend *legend READ legend)
Q_PROPERTY(int count READ count)
Q_PROPERTY(QColor backgroundColor READ backgroundColor WRITE setBackgroundColor NOTIFY backgroundColorChanged)
Q_PROPERTY(bool dropShadowEnabled READ dropShadowEnabled WRITE setDropShadowEnabled NOTIFY dropShadowEnabledChanged)
Q_PROPERTY(qreal topMargin READ topMargin)
Q_PROPERTY(qreal bottomMargin READ bottomMargin)
Q_PROPERTY(qreal leftMargin READ leftMargin)
Q_PROPERTY(qreal rightMargin READ rightMargin)
Q_PROPERTY(DeclarativeMargins *minimumMargins READ minimumMargins NOTIFY minimumMarginsChanged REVISION 1)
Q_PROPERTY(DeclarativeMargins *margins READ margins NOTIFY marginsChanged REVISION 2)
Q_PROPERTY(QRectF plotArea READ plotArea NOTIFY plotAreaChanged REVISION 1)
Q_PROPERTY(QColor plotAreaColor READ plotAreaColor WRITE setPlotAreaColor NOTIFY plotAreaColorChanged REVISION 3)
#ifdef CHARTS_FOR_QUICK2
Q_PROPERTY(QQmlListProperty<QAbstractAxis> axes READ axes REVISION 2)
#else
Q_PROPERTY(QDeclarativeListProperty<QAbstractAxis> axes READ axes REVISION 2)
#endif
Q_ENUMS(Animation)
Q_ENUMS(Theme)
Q_ENUMS(SeriesType)
public:
// duplicating enums from QChart to make the QML api namings 1-to-1 with the C++ api
enum Theme {
ChartThemeLight = 0,
ChartThemeBlueCerulean,
ChartThemeDark,
ChartThemeBrownSand,
ChartThemeBlueNcs,
ChartThemeHighContrast,
ChartThemeBlueIcy
};
enum Animation {
NoAnimation = 0x0,
GridAxisAnimations = 0x1,
SeriesAnimations = 0x2,
AllAnimations = 0x3
};
enum SeriesType {
SeriesTypeLine,
SeriesTypeArea,
SeriesTypeBar,
SeriesTypeStackedBar,
SeriesTypePercentBar,
SeriesTypePie,
SeriesTypeScatter,
SeriesTypeSpline,
SeriesTypeHorizontalBar,
SeriesTypeHorizontalStackedBar,
SeriesTypeHorizontalPercentBar
};
public:
DeclarativeChart(QDECLARATIVE_ITEM *parent = 0);
~DeclarativeChart();
public: // From parent classes
void childEvent(QChildEvent *event);
void componentComplete();
void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry);
#ifdef CHARTS_FOR_QUICK2
void paint(QPainter *painter);
protected:
void mousePressEvent(QMouseEvent *event);
void mouseReleaseEvent(QMouseEvent *event);
void hoverMoveEvent(QHoverEvent *event);
private Q_SLOTS:
void handleAntialiasingChanged(bool enable);
void sceneChanged(QList<QRectF> region);
void renderScene();
#endif
public:
void setTheme(DeclarativeChart::Theme theme);
DeclarativeChart::Theme theme();
void setAnimationOptions(DeclarativeChart::Animation animations);
DeclarativeChart::Animation animationOptions();
void setTitle(QString title);
QString title();
QLegend *legend();
QFont titleFont() const;
void setTitleFont(const QFont &font);
void setTitleColor(QColor color);
QColor titleColor();
void setBackgroundColor(QColor color);
QColor backgroundColor();
Q_REVISION(3) void setPlotAreaColor(QColor color);
Q_REVISION(3) QColor plotAreaColor();
int count();
void setDropShadowEnabled(bool enabled);
bool dropShadowEnabled();
// Margins & plotArea
qreal topMargin();
qreal bottomMargin();
qreal leftMargin();
qreal rightMargin();
DeclarativeMargins *minimumMargins() { return m_margins; }
Q_REVISION(2) DeclarativeMargins *margins() { return m_margins; }
QRectF plotArea() { return m_chart->plotArea(); }
// Axis handling
QAbstractAxis *defaultAxis(Qt::Orientation orientation, QAbstractSeries *series);
void initializeAxes(QAbstractSeries *series);
void doInitializeAxes(QAbstractSeries *series, DeclarativeAxes *axes);
QDECLARATIVE_LIST_PROPERTY<QAbstractAxis> axes();
static void axesAppendFunc(QDECLARATIVE_LIST_PROPERTY<QAbstractAxis> *list, QAbstractAxis *element);
static int axesCountFunc(QDECLARATIVE_LIST_PROPERTY<QAbstractAxis> *list);
static QAbstractAxis *axesAtFunc(QDECLARATIVE_LIST_PROPERTY<QAbstractAxis> *list, int index);
static void axesClearFunc(QDECLARATIVE_LIST_PROPERTY<QAbstractAxis> *list);
public:
Q_INVOKABLE QAbstractSeries *series(int index);
Q_INVOKABLE QAbstractSeries *series(QString seriesName);
Q_INVOKABLE QAbstractSeries *createSeries(int type, QString name = "", QAbstractAxis *axisX = 0, QAbstractAxis *axisY = 0);
Q_INVOKABLE void removeSeries(QAbstractSeries *series);
Q_INVOKABLE void removeAllSeries() { m_chart->removeAllSeries(); }
Q_INVOKABLE void setAxisX(QAbstractAxis *axis, QAbstractSeries *series = 0);
Q_INVOKABLE void setAxisY(QAbstractAxis *axis, QAbstractSeries *series = 0);
Q_INVOKABLE void createDefaultAxes();
Q_INVOKABLE QAbstractAxis *axisX(QAbstractSeries *series = 0);
Q_INVOKABLE QAbstractAxis *axisY(QAbstractSeries *series = 0);
Q_INVOKABLE void zoom(qreal factor);
Q_INVOKABLE void scrollLeft(qreal pixels);
Q_INVOKABLE void scrollRight(qreal pixels);
Q_INVOKABLE void scrollUp(qreal pixels);
Q_INVOKABLE void scrollDown(qreal pixels);
Q_SIGNALS:
void axisLabelsChanged();
void titleColorChanged(QColor color);
void backgroundColorChanged();
void dropShadowEnabledChanged(bool enabled);
void minimumMarginsChanged();
Q_REVISION(2) void marginsChanged();
void plotAreaChanged(QRectF plotArea);
void seriesAdded(QAbstractSeries *series);
void seriesRemoved(QAbstractSeries *series);
Q_REVISION(3) void plotAreaColorChanged();
private Q_SLOTS:
void changeMinimumMargins(int top, int bottom, int left, int right);
void handleAxisXSet(QAbstractAxis *axis);
void handleAxisYSet(QAbstractAxis *axis);
void handleAxisXTopSet(QAbstractAxis *axis);
void handleAxisYRightSet(QAbstractAxis *axis);
void handleSeriesAdded(QAbstractSeries *series);
protected:
explicit DeclarativeChart(QChart::ChartType type, QDECLARATIVE_ITEM *parent);
private:
void initChart(QChart::ChartType type);
// Extending QChart with DeclarativeChart is not possible because QObject does not support
// multi inheritance, so we now have a QChart as a member instead
QChart *m_chart;
#ifdef CHARTS_FOR_QUICK2
QGraphicsScene *m_scene;
QPointF m_mousePressScenePoint;
QPoint m_mousePressScreenPoint;
QPointF m_lastMouseMoveScenePoint;
QPoint m_lastMouseMoveScreenPoint;
Qt::MouseButton m_mousePressButton;
Qt::MouseButtons m_mousePressButtons;
QMutex m_sceneImageLock;
QImage *m_currentSceneImage;
bool m_updatePending;
Qt::HANDLE m_paintThreadId;
Qt::HANDLE m_guiThreadId;
#endif
DeclarativeMargins *m_margins;
};
QTCOMMERCIALCHART_END_NAMESPACE
#endif // DECLARATIVECHART_H