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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "searchlineedit.h"
#include <QtGui/QPainter>
#include <QtGui/QMouseEvent>
#include <QtGui/QMenu>
#include <QtGui/QStyle>
#include <QtGui/QStyleOptionFrameV2>
ClearButton::ClearButton(QWidget *parent)
: QAbstractButton(parent)
{
setCursor(Qt::ArrowCursor);
setToolTip(tr("Clear"));
setVisible(false);
setFocusPolicy(Qt::NoFocus);
}
void ClearButton::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
QPainter painter(this);
int height = this->height();
painter.setRenderHint(QPainter::Antialiasing, true);
QColor color = palette().color(QPalette::Mid);
painter.setBrush(isDown()
? palette().color(QPalette::Dark)
: palette().color(QPalette::Mid));
painter.setPen(painter.brush().color());
int size = width();
int offset = size / 5;
int radius = size - offset * 2;
painter.drawEllipse(offset, offset, radius, radius);
painter.setPen(palette().color(QPalette::Base));
int border = offset * 2;
painter.drawLine(border, border, width() - border, height - border);
painter.drawLine(border, height - border, width() - border, border);
}
void ClearButton::textChanged(const QString &text)
{
setVisible(!text.isEmpty());
}
/*
Search icon on the left hand side of the search widget
When a menu is set a down arrow appears
*/
class SearchButton : public QAbstractButton {
public:
SearchButton(QWidget *parent = 0);
void paintEvent(QPaintEvent *event);
QMenu *m_menu;
protected:
void mousePressEvent(QMouseEvent *event);
};
SearchButton::SearchButton(QWidget *parent)
: QAbstractButton(parent),
m_menu(0)
{
setObjectName(QLatin1String("SearchButton"));
setCursor(Qt::ArrowCursor);
setFocusPolicy(Qt::NoFocus);
}
void SearchButton::mousePressEvent(QMouseEvent *event)
{
if (m_menu && event->button() == Qt::LeftButton) {
QWidget *p = parentWidget();
if (p) {
QPoint r = p->mapToGlobal(QPoint(0, p->height()));
m_menu->exec(QPoint(r.x() + height() / 2, r.y()));
}
event->accept();
}
QAbstractButton::mousePressEvent(event);
}
void SearchButton::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
QPainterPath myPath;
int radius = (height() / 5) * 2;
QRect circle(height() / 3 - 1, height() / 4, radius, radius);
myPath.addEllipse(circle);
myPath.arcMoveTo(circle, 300);
QPointF c = myPath.currentPosition();
int diff = height() / 7;
myPath.lineTo(qMin(width() - 2, (int)c.x() + diff), c.y() + diff);
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing, true);
painter.setPen(QPen(Qt::darkGray, 2));
painter.drawPath(myPath);
if (m_menu) {
QPainterPath dropPath;
dropPath.arcMoveTo(circle, 320);
QPointF c = dropPath.currentPosition();
c = QPointF(c.x() + 3.5, c.y() + 0.5);
dropPath.moveTo(c);
dropPath.lineTo(c.x() + 4, c.y());
dropPath.lineTo(c.x() + 2, c.y() + 2);
dropPath.closeSubpath();
painter.setPen(Qt::darkGray);
painter.setBrush(Qt::darkGray);
painter.setRenderHint(QPainter::Antialiasing, false);
painter.drawPath(dropPath);
}
painter.end();
}
/*
SearchLineEdit is an enhanced QLineEdit
- A Search icon on the left with optional menu
- When there is no text and doesn't have focus an "inactive text" is displayed
- When there is text a clear button is displayed on the right hand side
*/
SearchLineEdit::SearchLineEdit(QWidget *parent) : ExLineEdit(parent),
m_searchButton(new SearchButton(this))
{
connect(lineEdit(), SIGNAL(textChanged(const QString &)),
this, SIGNAL(textChanged(const QString &)));
setLeftWidget(m_searchButton);
m_inactiveText = tr("Search");
QSizePolicy policy = sizePolicy();
setSizePolicy(QSizePolicy::Preferred, policy.verticalPolicy());
}
void SearchLineEdit::paintEvent(QPaintEvent *event)
{
if (lineEdit()->text().isEmpty() && !hasFocus() && !m_inactiveText.isEmpty()) {
ExLineEdit::paintEvent(event);
QStyleOptionFrameV2 panel;
initStyleOption(&panel);
QRect r = style()->subElementRect(QStyle::SE_LineEditContents, &panel, this);
QFontMetrics fm = fontMetrics();
int horizontalMargin = lineEdit()->x();
QRect lineRect(horizontalMargin + r.x(), r.y() + (r.height() - fm.height() + 1) / 2,
r.width() - 2 * horizontalMargin, fm.height());
QPainter painter(this);
painter.setPen(palette().brush(QPalette::Disabled, QPalette::Text).color());
painter.drawText(lineRect, Qt::AlignLeft|Qt::AlignVCenter, m_inactiveText);
} else {
ExLineEdit::paintEvent(event);
}
}
void SearchLineEdit::resizeEvent(QResizeEvent *event)
{
updateGeometries();
ExLineEdit::resizeEvent(event);
}
void SearchLineEdit::updateGeometries()
{
int menuHeight = height();
int menuWidth = menuHeight + 1;
if (!m_searchButton->m_menu)
menuWidth = (menuHeight / 5) * 4;
m_searchButton->resize(QSize(menuWidth, menuHeight));
}
QString SearchLineEdit::inactiveText() const
{
return m_inactiveText;
}
void SearchLineEdit::setInactiveText(const QString &text)
{
m_inactiveText = text;
}
void SearchLineEdit::setMenu(QMenu *menu)
{
if (m_searchButton->m_menu)
m_searchButton->m_menu->deleteLater();
m_searchButton->m_menu = menu;
updateGeometries();
}
QMenu *SearchLineEdit::menu() const
{
if (!m_searchButton->m_menu) {
m_searchButton->m_menu = new QMenu(m_searchButton);
if (isVisible())
(const_cast<SearchLineEdit*>(this))->updateGeometries();
}
return m_searchButton->m_menu;
}
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