1// Copyright (C) 2023 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
3
4#ifndef POINTRENDERER_H
5#define POINTRENDERER_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the QtGraphs API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16
17#include <QQuickItem>
18#include <QtGraphs/qabstractseries.h>
19#include <QtQuick/private/qsgdefaultinternalrectanglenode_p.h>
20#include <QtQuickShapes/private/qquickshape_p.h>
21#include <QPainterPath>
22
23QT_BEGIN_NAMESPACE
24
25class QGraphsView;
26class QXYSeries;
27class QLineSeries;
28class QScatterSeries;
29class QSplineSeries;
30class AxisRenderer;
31struct QLegendData;
32
33class PointRenderer : public QQuickItem
34{
35 Q_OBJECT
36public:
37 PointRenderer(QGraphsView *graph);
38 ~PointRenderer() override;
39
40 void handlePolish(QXYSeries *series);
41 void afterPolish(QList<QAbstractSeries *> &cleanupSeries);
42 void updateSeries(QXYSeries *series);
43 void afterUpdate(QList<QAbstractSeries *> &cleanupSeries);
44 bool handleMouseMove(QMouseEvent *event);
45 bool handleMousePress(QMouseEvent *event);
46 bool handleMouseRelease(QMouseEvent *event);
47 bool handleHoverMove(QHoverEvent *event);
48
49private:
50 struct PointGroup
51 {
52 QXYSeries *series = nullptr;
53 QQuickShapePath *shapePath = nullptr;
54 QPainterPath painterPath;
55 QList<QQuickItem *> markers;
56 QQmlComponent *currentMarker = nullptr;
57 QQmlComponent *previousMarker = nullptr;
58 QList<QRectF> rects;
59 qsizetype colorIndex = -1;
60 bool hover = false;
61 };
62
63 QQmlComponent *m_tempMarker = nullptr;
64
65 QGraphsView *m_graph = nullptr;
66 QQuickShape m_shape;
67 QMap<QXYSeries *, PointGroup *> m_groups;
68 qsizetype m_currentColorIndex = 0;
69
70 // Point drag variables
71 bool m_pointPressed = false;
72 bool m_pointDragging = false;
73 QPoint m_pressStart;
74 PointGroup *m_pressedGroup = nullptr;
75 qsizetype m_pressedPointIndex = 0;
76
77 // Render area variables
78 qreal m_maxVertical = 0;
79 qreal m_maxHorizontal = 0;
80 qreal m_verticalOffset = 0;
81 qreal m_horizontalOffset = 0;
82 qreal m_areaWidth = 0;
83 qreal m_areaHeight = 0;
84
85 qreal defaultSize(QXYSeries *series = nullptr);
86
87 struct SeriesStyle {
88 QColor color;
89 QColor selectedColor;
90 QColor borderColor;
91 qreal borderWidth;
92 };
93
94 SeriesStyle getSeriesStyle(PointGroup *group);
95
96 void calculateRenderCoordinates(
97 AxisRenderer *axisRenderer, qreal origX, qreal origY, qreal *renderX, qreal *renderY);
98 void reverseRenderCoordinates(
99 AxisRenderer *axisRenderer, qreal renderX, qreal renderY, qreal *origX, qreal *origY);
100 void updatePointDelegate(
101 QXYSeries *series, PointGroup *group, qsizetype pointIndex, qreal x, qreal y);
102 void hidePointDelegates(QXYSeries *series);
103 void updateLegendData(QXYSeries *series, QLegendData &legendData);
104
105 void updateScatterSeries(QScatterSeries *scatter, QLegendData &legendData);
106 void updateLineSeries(QLineSeries *line, QLegendData &legendData);
107 void updateSplineSeries(QSplineSeries *spline, QLegendData &legendData);
108};
109
110QT_END_NAMESPACE
111
112#endif // POINTRENDERER_H
113

source code of qtgraphs/src/graphs2d/qsgrenderer/pointrenderer_p.h