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fileoperationdialog_p.h
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fileoperationdialog_p.h
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/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef FM_FILEOPERATIONDIALOG_P_H
#define FM_FILEOPERATIONDIALOG_P_H
#include <QPainter>
#include <QStyleOption>
#include <QLabel>
namespace Fm {
class ElidedLabel : public QLabel {
Q_OBJECT
public:
explicit ElidedLabel(QWidget *parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags()):
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);
}
protected:
// A simplified version of QLabel::paintEvent() without pixmap or shortcut but with eliding.
void paintEvent(QPaintEvent* /*event*/) override {
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
if(!elidedText_.isEmpty()) {
QPainter painter(this);
QStyleOption opt;
opt.initFrom(this);
style()->drawItemText(&painter, cr, alignment(), opt.palette, isEnabled(), elidedText_, foregroundRole());
}
}
private:
QString elidedText_;
QString lastText_;
int lastWidth_;
};
}
#endif // FM_FILEOPERATIONDIALOG_P_H