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clearablelineedit.cpp
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20 
21 #include "clearablelineedit.h"
22 
23 #include <QIcon>
24 #include <QToolButton>
25 #include <QStyle>
26 
28  : QLineEdit(parent)
29 {
30  clearButton = new QToolButton(this);
31  clearButton->setIcon(QIcon::fromTheme("edit-clear-locationbar-rtl", QIcon::fromTheme("edit-clear")));
32 #ifndef Q_WS_QWS
33  clearButton->setCursor(Qt::ArrowCursor);
34 #endif
35  clearButton->setStyleSheet("QToolButton { border: none; padding: 0px; }");
36  clearButton->hide();
37 
38  connect(clearButton, SIGNAL(clicked()), this, SLOT(clear()));
39  connect(this, SIGNAL(textChanged(const QString &)), this, SLOT(updateClearButton(const QString &)));
40 
41  int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
42  setStyleSheet(QString("QLineEdit { padding-right: %1px; } ").arg(clearButton->sizeHint().width() + frameWidth + 1));
43  QSize msz = minimumSizeHint();
44  setMinimumSize(qMax(msz.width(), clearButton->sizeHint().height() + frameWidth * 2 + 2),
45  qMax(msz.height(), clearButton->sizeHint().height() + frameWidth * 2 + 2));
46 }
47 
48 
49 void ClearableLineEdit::resizeEvent(QResizeEvent *)
50 {
51  QSize size = clearButton->sizeHint();
52  int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
53  clearButton->move(rect().right() - frameWidth - size.width(),
54  (rect().bottom() + 1 - size.height())/2);
55 }
56 
57 
58 void ClearableLineEdit::updateClearButton(const QString &text)
59 {
60  clearButton->setVisible(!text.isEmpty());
61 }