src/uisupport/clearablelineedit.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005/06 by the Quassel Project                          *
   3  *   devel@quassel-irc.org                                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   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,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  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 void ClearableLineEdit::resizeEvent(QResizeEvent *) {
  50   QSize size = clearButton->sizeHint();
  51   int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
  52   clearButton->move(rect().right() - frameWidth - size.width(),
  53                     (rect().bottom() + 1 - size.height())/2);
  54 }
  55
  56 void ClearableLineEdit::updateClearButton(const QString& text) {
  57   clearButton->setVisible(!text.isEmpty());
  58 }