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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.
7**
8** $QT_BEGIN_LICENSE:GPL$
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28****************************************************************************/
29
30#include <private/charttitle_p.h>
31#include <private/chartpresenter_p.h>
32#include <QtGui/QFont>
33#include <QtGui/QFontMetrics>
34#include <QtCore/QDebug>
35#include <QtGui/QTextDocument>
36
37QT_CHARTS_BEGIN_NAMESPACE
38
39ChartTitle::ChartTitle(QGraphicsItem *parent)
40 : QGraphicsTextItem(parent)
41{
42 document()->setDocumentMargin(ChartPresenter::textMargin());
43}
44
45ChartTitle::~ChartTitle()
46{
47
48}
49
50void ChartTitle::setText(const QString &text)
51{
52 m_text = text;
53}
54
55QString ChartTitle::text() const
56{
57 return m_text;
58}
59
60void ChartTitle::setGeometry(const QRectF &rect)
61{
62 QRectF truncatedRect;
63 if (m_text.isEmpty()) {
64 QGraphicsTextItem::setHtml(m_text);
65 QGraphicsTextItem::setTextWidth(0.0);
66 } else {
67 QGraphicsTextItem::setHtml(ChartPresenter::truncatedText(font: font(), text: m_text, angle: qreal(0.0),
68 maxWidth: rect.width(), maxHeight: rect.height(),
69 boundingRect&: truncatedRect));
70 QGraphicsTextItem::setTextWidth(truncatedRect.width());
71 }
72 setPos(rect.topLeft());
73}
74
75
76QSizeF ChartTitle::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
77{
78 Q_UNUSED(constraint);
79 QSizeF sh;
80
81 switch (which) {
82 case Qt::MinimumSize: {
83 QRectF titleRect = ChartPresenter::textBoundingRect(font: font(), QStringLiteral("..."));
84 sh = QSizeF(titleRect.width(), titleRect.height());
85 break;
86 }
87 case Qt::PreferredSize:
88 case Qt::MaximumSize: {
89 QRectF titleRect = ChartPresenter::textBoundingRect(font: font(), text: m_text);
90 sh = QSizeF(titleRect.width(), titleRect.height());
91 break;
92 }
93 case Qt::MinimumDescent: {
94 QFontMetrics fn(font());
95 sh = QSizeF(0, fn.descent());
96 break;
97 }
98 default:
99 break;
100 }
101
102 return sh;
103}
104
105QT_CHARTS_END_NAMESPACE
106

source code of qtcharts/src/charts/charttitle.cpp