Long live Qt 4.5!

1 files changed, 238 insertions, 0 deletions

diff --git a/demos/browser/searchlineedit.cpp b/demos/browser/searchlineedit.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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;
+}
+