Rename the widget browser example demobrowser

The browser example already uses the name demobrowser internally, this
changes the external name to make it easier to refer to explicitly, and
avoid users thinking fancybrowser is the better example.

Change-Id: Ic093eb4881352b5f796bf565df01edb929aba39c
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

1 files changed, 240 insertions, 0 deletions

diff --git a/examples/webenginewidgets/demobrowser/searchlineedit.cpp b/examples/webenginewidgets/demobrowser/searchlineedit.cpp
new file mode 100644
index 000000000..5152ac1c0
--- /dev/null
+++ b/examples/webenginewidgets/demobrowser/searchlineedit.cpp
@@ -0,0 +1,240 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** 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.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "searchlineedit.h"
+
+#include <QtGui/QPainter>
+#include <QtGui/QMouseEvent>
+#include <QtWidgets/QMenu>
+#include <QtWidgets/QStyle>
+#include <QtWidgets/QStyleOptionFrameV2>
+
+ClearButton::ClearButton(QWidget *parent)
+  : QAbstractButton(parent)
+{
+#ifndef QT_NO_CURSOR
+    setCursor(Qt::ArrowCursor);
+#endif // QT_NO_CURSOR
+    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);
+    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"));
+#ifndef QT_NO_CURSOR
+    setCursor(Qt::ArrowCursor);
+#endif //QT_NO_CURSOR
+    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(QString)),
+            this, SIGNAL(textChanged(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;
+}