1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/***
This file is part of pavucontrol-qt.
pavucontrol-qt is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
pavucontrol-qt is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with pavucontrol-qt. If not, see <https://www.gnu.org/licenses/>.
***/
#include "elidinglabel.h"
#include <QPainter>
#include <QStyleOption>
ElidingLabel::ElidingLabel(QWidget *parent, Qt::WindowFlags f):
QLabel(parent, f),
lastWidth_(0) {
setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
// set a min width to prevent the window from widening with long texts
setMinimumWidth(fontMetrics().averageCharWidth() * 10);
}
// A simplified version of QLabel::paintEvent() without pixmap or shortcut but with eliding
void ElidingLabel::paintEvent(QPaintEvent */*event*/) {
QRect cr = contentsRect().adjusted(margin(), margin(), -margin(), -margin());
QString txt = text();
// if the text is changed or its rect is resized (due to window resizing),
// find whether it needs to be elided...
if (txt != lastText_ || cr.width() != lastWidth_) {
lastText_ = txt;
lastWidth_ = cr.width();
elidedText_ = fontMetrics().elidedText(txt, Qt::ElideMiddle, cr.width());
}
// ... then, draw the (elided) text */
QPainter painter(this);
QStyleOption opt;
opt.initFrom(this);
style()->drawItemText(&painter, cr, alignment(), opt.palette, isEnabled(), elidedText_, foregroundRole());
}
|
