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36
37#include "qquickmnemoniclabel_p.h"
38
39#include <QtQuick/private/qquicktext_p_p.h>
40
41QT_BEGIN_NAMESPACE
42
43QQuickMnemonicLabel::QQuickMnemonicLabel(QQuickItem *parent)
44 : QQuickText(parent)
45{
46}
47
48QString QQuickMnemonicLabel::text() const
49{
50 return m_fullText;
51}
52
53void QQuickMnemonicLabel::setText(const QString &text)
54{
55 if (m_fullText == text)
56 return;
57
58 m_fullText = text;
59 updateMnemonic();
60}
61
62bool QQuickMnemonicLabel::isMnemonicVisible() const
63{
64 return m_mnemonicVisible;
65}
66
67void QQuickMnemonicLabel::setMnemonicVisible(bool visible)
68{
69 if (m_mnemonicVisible == visible)
70 return;
71
72 m_mnemonicVisible = visible;
73 updateMnemonic();
74
75 if (isComponentComplete())
76 forceLayout();
77}
78
79static QTextLayout::FormatRange underlineRange(int start, int length = 1)
80{
81 QTextLayout::FormatRange range;
82 range.start = start;
83 range.length = length;
84 range.format.setFontUnderline(true);
85 return range;
86}
87
88// based on QPlatformTheme::removeMnemonics()
89void QQuickMnemonicLabel::updateMnemonic()
90{
91 QString text(m_fullText.size(), QChar::Null);
92 int idx = 0;
93 int pos = 0;
94 int len = m_fullText.length();
95 QVector<QTextLayout::FormatRange> formats;
96 while (len) {
97 if (m_fullText.at(i: pos) == QLatin1Char('&') && (len == 1 || m_fullText.at(i: pos + 1) != QLatin1Char('&'))) {
98 if (m_mnemonicVisible && (pos == 0 || m_fullText.at(i: pos - 1) != QLatin1Char('&')))
99 formats += underlineRange(start: pos);
100 ++pos;
101 --len;
102 if (len == 0)
103 break;
104 } else if (m_fullText.at(i: pos) == QLatin1Char('(') && len >= 4 &&
105 m_fullText.at(i: pos + 1) == QLatin1Char('&') &&
106 m_fullText.at(i: pos + 2) != QLatin1Char('&') &&
107 m_fullText.at(i: pos + 3) == QLatin1Char(')')) {
108 // a mnemonic with format "\s*(&X)"
109 if (m_mnemonicVisible) {
110 formats += underlineRange(start: pos + 1);
111 } else {
112 int n = 0;
113 while (idx > n && text.at(i: idx - n - 1).isSpace())
114 ++n;
115 idx -= n;
116 pos += 4;
117 len -= 4;
118 continue;
119 }
120 }
121 text[idx] = m_fullText.at(i: pos);
122 ++pos;
123 ++idx;
124 --len;
125 }
126 text.truncate(pos: idx);
127
128 QQuickTextPrivate::get(t: this)->layout.setFormats(formats);
129 QQuickText::setText(text);
130}
131
132QT_END_NAMESPACE
133

source code of qtquickcontrols2/src/quickcontrols2/qquickmnemoniclabel.cpp