src/uisupport/clearablelineedit.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-2015 by the Quassel Project                        *
   3  *   devel@quassel-irc.org                                                 *
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   8  *   (at your option) version 3.                                           *
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  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         *
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  20
  21 #include "clearablelineedit.h"
  22
  23 #include <QIcon>
  24 #include <QToolButton>
  25 #include <QStyle>
  26
  27 ClearableLineEdit::ClearableLineEdit(QWidget *parent)
  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 }