1// Copyright (C) 2023 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
3
4#ifndef BARSRENDERER_H
5#define BARSRENDERER_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 <QtQuick/private/qquicktext_p.h>
19#include <QtCore/QHash>
20#include <QtCore/QList>
21#include <QtCore/QRectF>
22#include <QtGui/QColor>
23
24QT_BEGIN_NAMESPACE
25
26class QGraphsView;
27class QBarSeries;
28class QBarSet;
29class QAbstractSeries;
30
31class BarsRenderer : public QQuickItem
32{
33 Q_OBJECT
34public:
35 BarsRenderer(QGraphsView *graph);
36 ~BarsRenderer() override;
37
38 void handlePolish(QBarSeries *series);
39 void updateSeries(QBarSeries *series);
40 void afterUpdate(QList<QAbstractSeries *> &cleanupSeries);
41 void afterPolish(QList<QAbstractSeries *> &cleanupSeries);
42 bool handleMousePress(QMouseEvent *event);
43 bool handleHoverMove(QHoverEvent *event);
44
45Q_SIGNALS:
46
47private:
48 struct BarSelectionRect {
49 QBarSeries *series = nullptr;
50 QBarSet *barSet = nullptr;
51 QList<QRectF> rects;
52 };
53 struct BarSeriesData {
54 QRectF rect;
55 QColor color;
56 QColor borderColor;
57 QString label;
58 QColor labelColor;
59 float value;
60 float borderWidth;
61 bool isSelected;
62 };
63
64 void updateVerticalBars(QBarSeries *series, qsizetype setCount, qsizetype valuesPerSet);
65 void updateHorizontalBars(QBarSeries *series, qsizetype setCount, qsizetype valuesPerSet);
66 QColor getSetColor(QBarSeries *series, QBarSet *set, qsizetype barSerieIndex);
67 QColor getSetSelectedColor(QBarSeries *series, QBarSet *set);
68 QColor getSetBorderColor(QBarSeries *series, QBarSet *set, qsizetype barSerieIndex);
69 qreal getSetBorderWidth(QBarSeries *series, QBarSet *set);
70 QString generateLabelText(QBarSeries *series, qreal value);
71 void positionLabelItem(QBarSeries *series, QQuickText *textItem, const BarSeriesData &d);
72 void updateComponents(QBarSeries *series);
73 void updateValueLabels(QBarSeries *series);
74
75 QGraphsView *m_graph = nullptr;
76 QHash<QBarSeries *, QList<BarSelectionRect>> m_rectNodesInputRects;
77 QHash<QBarSeries *, QList<QQuickItem *>> m_barItems;
78 QHash<QBarSeries *, QList<QQuickText *>> m_labelTextItems;
79 QHash<QBarSeries *, QList<BarSeriesData>> m_seriesData;
80
81 QBarSeries *m_currentHoverSeries = nullptr;
82 qsizetype m_colorIndex = -1;
83 // Margin between bars.
84 float m_barMargin = 2.0;
85};
86
87QT_END_NAMESPACE
88
89#endif // BARSRENDERER_H
90

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