/****************************************************************************
**
** Copyright (c) 2007 Trolltech ASA <info@trolltech.com>
**
** Use, modification and distribution is allowed without limitation,
** warranty, liability or support of any kind.
**
****************************************************************************/

#include "searchlineedit.h"
#include <QToolButton>
#include <QStyle>
#include <QStyleOptionFrame>
#include <QPainter>

SearchLineEdit::SearchLineEdit(QWidget *parent)
        : QLineEdit(parent)
{
    clearButton = new QToolButton(this);
    QPixmap pixmap = QPixmap(":/icons/close.png").scaledToHeight(15, Qt::SmoothTransformation);
    clearButton->setIcon(QIcon(pixmap));
    clearButton->setIconSize(pixmap.size());
    clearButton->setCursor(Qt::ArrowCursor);
    clearButton->setStyleSheet("QToolButton { border: none; padding: 0px; }");
    clearButton->hide();
    connect(clearButton, SIGNAL(clicked()), this, SLOT(clear()));
    connect(this, SIGNAL(textChanged(const QString&)), this, SLOT(updateCloseButton(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 SearchLineEdit::resizeEvent(QResizeEvent *)
{
    QSize sz = clearButton->sizeHint();
    int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
    clearButton->move(rect().right() - frameWidth - sz.width(),
                      (rect().bottom() + 1 - sz.height()) / 2);
}

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

void SearchLineEdit::paintEvent(QPaintEvent *event)
{
    QLineEdit::paintEvent(event);
    if (text().isEmpty() && !hasFocus()) {
        QStyleOptionFrame option;
        initStyleOption(&option);
        QRect textRect = style()->subElementRect(QStyle::SE_LineEditContents, &option, this);
        QPainter painter(this);
        painter.setPen(Qt::gray);
        painter.drawText(textRect.adjusted(10, 0, 0, 0), Qt::AlignLeft | Qt::AlignVCenter, tr("Search"));
    }
}