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comparison src/gui/widgets/elided_label.cc @ 253:b3549da699a6

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*: ooooh! stupid big commit! oops
author Paper <paper@paper.us.eu.org>
date Tue, 06 Feb 2024 16:56:32 -0500
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children 862d0d8619f6
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252:a0eeb2cc7e6d 253:b3549da699a6
1 /*
2 * Copyright (C) 2016 The Qt Company Ltd.
3 * Contact: https://www.qt.io/licensing/
4 *
5 * This file is part of the QtCore module of the Qt Toolkit.
6 *
7 * "Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met:
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 * * Neither the name of The Qt Company Ltd nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
31 */
32
33 #include "gui/widgets/elided_label.h"
34
35 #include <QPainter>
36 #include <QSizePolicy>
37 #include <QTextLayout>
38
39 ElidedLabel::ElidedLabel(const QString& text, QWidget* parent)
40 : QFrame(parent), content(text) {
41 setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
42 }
43
44 void ElidedLabel::SetText(const QString& text) {
45 content = text;
46 update();
47 }
48
49 void ElidedLabel::paintEvent(QPaintEvent *event) {
50 QFrame::paintEvent(event);
51
52 QPainter painter(this);
53 QFontMetrics fontMetrics = painter.fontMetrics();
54
55 int line_spacing = fontMetrics.lineSpacing();
56 int y = 0;
57
58 QTextLayout textLayout(content, painter.font());
59 textLayout.beginLayout();
60 for (;;) {
61 QTextLine line = textLayout.createLine();
62
63 if (!line.isValid())
64 break;
65
66 line.setLineWidth(width());
67 int nextLineY = y + line_spacing;
68
69 if (height() >= nextLineY + line_spacing) {
70 line.draw(&painter, QPoint(0, y));
71 y = nextLineY;
72 } else {
73 QString last_line = content.mid(line.textStart());
74 QString elided_last_line = fontMetrics.elidedText(last_line, Qt::ElideRight, width());
75 painter.drawText(QPoint(0, y + fontMetrics.ascent()), elided_last_line);
76 line = textLayout.createLine();
77 break;
78 }
79 }
80 textLayout.endLayout();
81 }