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** This file is part of the demos of the Qt Toolkit.
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#include "AddressBar.h"

#include <QtCore>
#include <QtGui>

class LineEdit: public QLineEdit
{
public:
    LineEdit(QWidget *parent = 0): QLineEdit(parent) {}

    void paintEvent(QPaintEvent *event) {
        QLineEdit::paintEvent(event);
        if (text().isEmpty()) {
            QPainter p(this);
            int flags = Qt::AlignLeft | Qt::AlignVCenter;
            p.setPen(palette().color(QPalette::Disabled, QPalette::Text));
            p.drawText(rect().adjusted(10, 0, 0, 0), flags, "Enter address or search terms");
            p.end();
        }
    }
};

AddressBar::AddressBar(QWidget *parent)
    : QWidget(parent)
{
    m_lineEdit = new LineEdit(parent);
    connect(m_lineEdit, SIGNAL(returnPressed()), SLOT(processAddress()));
    m_toolButton = new QToolButton(parent);
    m_toolButton->setText("Go");
    connect(m_toolButton, SIGNAL(clicked()), SLOT(processAddress()));
}

QSize AddressBar::sizeHint() const
{
    return m_lineEdit->sizeHint();
}

void AddressBar::processAddress()
{
    if (!m_lineEdit->text().isEmpty())
        emit addressEntered(m_lineEdit->text());
}

void AddressBar::resizeEvent(QResizeEvent *event)
{
    int x, y, w, h;

    m_toolButton->adjustSize();
    x = width() - m_toolButton->width();
    y = 0;
    w = m_toolButton->width();
    h = height() - 1;
    m_toolButton->setGeometry(x, y, w, h);
    m_toolButton->show();

    x = 0;
    y = 0;
    w = width() - m_toolButton->width();
    h = height() - 1;
    m_lineEdit->setGeometry(x, y, w, h);
    m_lineEdit->show();
}

void AddressBar::focusInEvent(QFocusEvent *event)
{
    m_lineEdit->setFocus();
    QWidget::focusInEvent(event);
}