src/uisupport/clearablelineedit.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-2013 by the Quassel Project                        *
   3  *   devel@quassel-irc.org                                                 *
   4  *                                                                         *
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   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) version 3.                                           *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
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  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
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  20
  21 #include "clearablelineedit.h"
  22
  23 #include <QToolButton>
  24 #include <QStyle>
  25
  26 #include "iconloader.h"
  27
  28 ClearableLineEdit::ClearableLineEdit(QWidget *parent)
  29     : QLineEdit(parent)
  30 {
  31     clearButton = new QToolButton(this);
  32     clearButton->setIcon(SmallIcon("edit-clear-locationbar-rtl"));
  33 #ifndef Q_WS_QWS
  34     clearButton->setCursor(Qt::ArrowCursor);
  35 #endif
  36     clearButton->setStyleSheet("QToolButton { border: none; padding: 0px; }");
  37     clearButton->hide();
  38
  39     connect(clearButton, SIGNAL(clicked()), this, SLOT(clear()));
  40     connect(this, SIGNAL(textChanged(const QString &)), this, SLOT(updateClearButton(const QString &)));
  41
  42     int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
  43     setStyleSheet(QString("QLineEdit { padding-right: %1px; } ").arg(clearButton->sizeHint().width() + frameWidth + 1));
  44     QSize msz = minimumSizeHint();
  45     setMinimumSize(qMax(msz.width(), clearButton->sizeHint().height() + frameWidth * 2 + 2),
  46         qMax(msz.height(), clearButton->sizeHint().height() + frameWidth * 2 + 2));
  47 }
  48
  49
  50 void ClearableLineEdit::resizeEvent(QResizeEvent *)
  51 {
  52     QSize size = clearButton->sizeHint();
  53     int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
  54     clearButton->move(rect().right() - frameWidth - size.width(),
  55         (rect().bottom() + 1 - size.height())/2);
  56 }
  57
  58
  59 void ClearableLineEdit::updateClearButton(const QString &text)
  60 {
  61     clearButton->setVisible(!text.isEmpty());
  62 }