clearablelineedit.cpp

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/***************************************************************************
 *   Copyright (C) 2005-2015 by the Quassel Project                        *
 *   devel@quassel-irc.org                                                 *
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#include "clearablelineedit.h"

#include <QIcon>
#include <QToolButton>
#include <QStyle>

ClearableLineEdit::ClearableLineEdit(QWidget *parent)
    : QLineEdit(parent)
{
    clearButton = new QToolButton(this);
    clearButton->setIcon(QIcon::fromTheme("edit-clear-locationbar-rtl", QIcon::fromTheme("edit-clear")));
#ifndef Q_WS_QWS
    clearButton->setCursor(Qt::ArrowCursor);
#endif
    clearButton->setStyleSheet("QToolButton { border: none; padding: 0px; }");
    clearButton->hide();

    connect(clearButton, SIGNAL(clicked()), this, SLOT(clear()));
    connect(this, SIGNAL(textChanged(const QString &)), this, SLOT(updateClearButton(const QString &)));

    int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
    setStyleSheet(QString("QLineEdit { padding-right: %1px; } ").arg(clearButton->sizeHint().width() + frameWidth + 1));
    QSize msz = minimumSizeHint();
    setMinimumSize(qMax(msz.width(), clearButton->sizeHint().height() + frameWidth * 2 + 2),
        qMax(msz.height(), clearButton->sizeHint().height() + frameWidth * 2 + 2));
}


void ClearableLineEdit::resizeEvent(QResizeEvent *)
{
    QSize size = clearButton->sizeHint();
    int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
    clearButton->move(rect().right() - frameWidth - size.width(),
        (rect().bottom() + 1 - size.height())/2);
}


void ClearableLineEdit::updateClearButton(const QString &text)
{
    clearButton->setVisible(!text.isEmpty());
}