Added plug&paint and gradients

demos/gradients/gradients.h

@@ -0,0 +1,170 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation ([email protected])
+**
+** This file is part of the demonstration applications 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 1.1, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at [email protected].
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef GRADIENTS_H
+#define GRADIENTS_H
+
+#include "arthurwidgets.h"
+
+#include <QtGui>
+
+class HoverPoints;
+
+
+class ShadeWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    enum ShadeType {
+        RedShade,
+        GreenShade,
+        BlueShade,
+        ARGBShade
+    };
+
+    ShadeWidget(ShadeType type, QWidget *parent);
+
+    void setGradientStops(const QGradientStops &stops);
+
+    void paintEvent(QPaintEvent *e);
+
+    QSize sizeHint() const { return QSize(150, 40); }
+    QPolygonF points() const;
+
+    HoverPoints *hoverPoints() const { return m_hoverPoints; }
+
+    uint colorAt(int x);
+
+signals:
+    void colorsChanged();
+
+private:
+    void generateShade();
+
+    ShadeType m_shade_type;
+    QImage m_shade;
+    HoverPoints *m_hoverPoints;
+    QLinearGradient m_alpha_gradient;
+};
+
+class GradientEditor : public QWidget
+{
+    Q_OBJECT
+public:
+    GradientEditor(QWidget *parent);
+
+    void setGradientStops(const QGradientStops &stops);
+
+public slots:
+    void pointsUpdated();
+
+signals:
+    void gradientStopsChanged(const QGradientStops &stops);
+
+private:
+    ShadeWidget *m_red_shade;
+    ShadeWidget *m_green_shade;
+    ShadeWidget *m_blue_shade;
+    ShadeWidget *m_alpha_shade;
+};
+
+
+class GradientRenderer : public ArthurFrame
+{
+    Q_OBJECT
+public:
+    GradientRenderer(QWidget *parent);
+    void paint(QPainter *p);
+
+    QSize sizeHint() const { return QSize(400, 400); }
+
+    HoverPoints *hoverPoints() const { return m_hoverPoints; }
+    void mousePressEvent(QMouseEvent *e);
+
+public slots:
+    void setGradientStops(const QGradientStops &stops);
+
+    void setPadSpread() { m_spread = QGradient::PadSpread; update(); }
+    void setRepeatSpread() { m_spread = QGradient::RepeatSpread; update(); }
+    void setReflectSpread() { m_spread = QGradient::ReflectSpread; update(); }
+
+    void setLinearGradient() { m_gradientType = Qt::LinearGradientPattern; update(); }
+    void setRadialGradient() { m_gradientType = Qt::RadialGradientPattern; update(); }
+    void setConicalGradient() { m_gradientType = Qt::ConicalGradientPattern; update(); }
+
+
+private:
+    QGradientStops m_stops;
+    HoverPoints *m_hoverPoints;
+
+    QGradient::Spread m_spread;
+    Qt::BrushStyle m_gradientType;
+};
+
+
+class GradientWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    GradientWidget(QWidget *parent);
+
+public slots:
+    void setDefault1() { setDefault(1); }
+    void setDefault2() { setDefault(2); }
+    void setDefault3() { setDefault(3); }
+    void setDefault4() { setDefault(4); }
+
+private:
+    void setDefault(int i);
+
+    GradientRenderer *m_renderer;
+    GradientEditor *m_editor;
+
+    QRadioButton *m_linearButton;
+    QRadioButton *m_radialButton;
+    QRadioButton *m_conicalButton;
+    QRadioButton *m_padSpreadButton;
+    QRadioButton *m_reflectSpreadButton;
+    QRadioButton *m_repeatSpreadButton;
+
+};
+
+#endif // GRADIENTS_H

demos/gradients/gradients.html

@@ -0,0 +1,31 @@
+<html>
+<center>
+<h2>Gradients</h2>
+</center>
+
+<p>In this demo we show the various types of gradients that can
+be used in Qt.</p>
+
+<p>There are three types of gradients:
+
+<ul>
+  <li><b>Linear</b> gradients interpolate colors between start and end
+  points.</li>
+  <li><b>Radial</b> gradients interpolate colors between a focal point and the
+  points on a circle surrounding it.</li>
+  <li><b>Conical</b> gradients interpolate colors around a center point.</li>
+</ul>
+
+</p>
+
+<p>The panel on the right contains a color table editor that defines
+the colors in the gradient. The three topmost controls determine the red,
+green and blue components while the last defines the alpha of the
+gradient. You can move points, and add new ones, by clicking with the left
+mouse button, and remove points by clicking with the right button.</p>
+
+<p>There are three default configurations available at the bottom of
+the page that are provided as suggestions on how a color table could be
+configured.</p>
+
+</html>

demos/gradients/gradients.pro

@@ -0,0 +1,20 @@
+SOURCES += main.cpp gradients.cpp
+HEADERS += gradients.h
+
+SHARED_FOLDER = ../shared
+
+include($$SHARED_FOLDER/shared.pri)
+
+RESOURCES += gradients.qrc
+contains(QT_CONFIG, opengl) {
+	DEFINES += QT_OPENGL_SUPPORT
+	QT += opengl
+}
+
+# install
+target.path = $$[QT_INSTALL_DEMOS]/gradients
+sources.files = $$SOURCES $$HEADERS $$RESOURCES *.pro *.html
+sources.path = $$[QT_INSTALL_DEMOS]/gradients
+INSTALLS += target sources
+
+symbian: include($$QT_SOURCE_TREE/demos/symbianpkgrules.pri)

demos/gradients/gradients.qrc

@@ -0,0 +1,6 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource prefix="/res/gradients">
+   <file>gradients.cpp</file>
+   <file>gradients.html</file>
+</qresource>
+</RCC>

demos/gradients/main.cpp

@@ -0,0 +1,63 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation ([email protected])
+**
+** This file is part of the demonstration applications 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 1.1, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at [email protected].
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "gradients.h"
+
+#include <QApplication>
+
+int main(int argc, char **argv)
+{
+    Q_INIT_RESOURCE(gradients);
+
+    QApplication app(argc, argv);
+
+    GradientWidget gradientWidget(0);
+    QStyle *arthurStyle = new ArthurStyle();
+    gradientWidget.setStyle(arthurStyle);
+    QList<QWidget *> widgets = qFindChildren<QWidget *>(&gradientWidget);
+    foreach (QWidget *w, widgets) {
+        w->setStyle(arthurStyle);
+        w->setAttribute(Qt::WA_AcceptTouchEvents);
+    }
+    gradientWidget.show();
+
+    return app.exec();
+}