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3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt Charts module of the Qt Toolkit.
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29
30// W A R N I N G
31// -------------
32//
33// This file is not part of the Qt Chart API. It exists purely as an
34// implementation detail. This header file may change from version to
35// version without notice, or even be removed.
36//
37// We mean it.
38
39
40#ifndef ABSTRACTBARCHARTITEM_H
41#define ABSTRACTBARCHARTITEM_H
42
43#include <private/chartitem_p.h>
44#include <QtCharts/QAbstractBarSeries>
45#include <QtCharts/private/qchartglobal_p.h>
46#include <QtGui/QPen>
47#include <QtGui/QBrush>
48
49QT_CHARTS_BEGIN_NAMESPACE
50
51class Bar;
52class QAxisCategories;
53class QChart;
54class BarAnimation;
55class QBarSetPrivate;
56class QAbstractAxis;
57
58class Q_CHARTS_PRIVATE_EXPORT AbstractBarChartItem : public ChartItem
59{
60 Q_OBJECT
61public:
62 AbstractBarChartItem(QAbstractBarSeries *series, QGraphicsItem* item = 0);
63 virtual ~AbstractBarChartItem();
64
65public:
66 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
67 QRectF boundingRect() const;
68
69 virtual QVector<QRectF> calculateLayout() = 0;
70 void initializeFullLayout();
71 virtual void initializeLayout(int set, int category, int layoutIndex, bool resetAnimation) = 0;
72 virtual void applyLayout(const QVector<QRectF> &layout);
73 virtual void setAnimation(BarAnimation *animation);
74 virtual ChartAnimation *animation() const;
75 void setLayout(const QVector<QRectF> &layout);
76 QRectF geometry() const { return m_rect;}
77 void resetAnimation();
78
79public Q_SLOTS:
80 void handleDomainUpdated();
81 void handleLayoutChanged();
82 void handleLabelsVisibleChanged(bool visible);
83 void handleDataStructureChanged(); // structure of of series has changed, recreate graphic items
84 void handleVisibleChanged();
85 void handleOpacityChanged();
86 void handleUpdatedBars();
87 void handleLabelsPositionChanged();
88 virtual void positionLabels();
89 void handleBarValueChange(int index, QBarSet *barset);
90 void handleBarValueAdd(int index, int count, QBarSet *barset);
91 void handleBarValueRemove(int index, int count, QBarSet *barset);
92 void handleSeriesAdded(QAbstractSeries *series);
93 void handleSeriesRemoved(QAbstractSeries *series);
94
95protected:
96 void positionLabelsVertical();
97 void createLabelItems();
98 void handleSetStructureChange();
99 virtual QString generateLabelText(int set, int category, qreal value);
100 void updateBarItems();
101 virtual void markLabelsDirty(QBarSet *barset, int index, int count);
102 void calculateSeriesPositionAdjustmentAndWidth();
103
104 QRectF m_rect;
105 QVector<QRectF> m_layout;
106
107 BarAnimation *m_animation;
108
109 QAbstractBarSeries *m_series; // Not owned.
110 QMap<QBarSet *, QList<Bar *> > m_barMap;
111 QMap<QBarSet *, QHash<int, Bar *> > m_indexForBarMap;
112 int m_firstCategory;
113 int m_lastCategory;
114 int m_categoryCount;
115 QSizeF m_oldSize;
116 bool m_labelItemsMissing;
117 Qt::Orientation m_orientation;
118 bool m_resetAnimation;
119 qreal m_seriesPosAdjustment;
120 qreal m_seriesWidth;
121};
122
123QT_CHARTS_END_NAMESPACE
124
125#endif // ABSTRACTBARCHARTITEM_H
126

source code of qtcharts/src/charts/barchart/abstractbarchartitem_p.h