adds a busy indicator spinning widget

to be used to indicate a wait of unknown duration

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=879671

CMakeLists.txt

@@ -81,6 +81,7 @@ set(plasma_LIB_SRCS
     widgets/scrollbar.cpp
     widgets/signalplotter.cpp
     widgets/slider.cpp
+    widgets/busywidget.cpp
     widgets/svgwidget.cpp
     widgets/tabbar.cpp
     widgets/treeview.cpp
@@ -196,6 +197,7 @@ install(FILES
     widgets/scrollbar.h
     widgets/signalplotter.h
     widgets/slider.h
+    widgets/busywidget.h
     widgets/svgwidget.h
     widgets/tabbar.h
     widgets/treeview.h
@@ -257,6 +259,7 @@ includes/Service
 includes/ServiceJob
 includes/SignalPlotter
 includes/Slider
+includes/BusyWidget
 includes/Svg
 includes/SvgWidget
 includes/TabBar

includes/BusyWidget

@@ -0,0 +1 @@
+#include "../../plasma/widgets/busywidget.h"

widgets/busywidget.cpp

@@ -0,0 +1,130 @@
+/*
+ *   Copyright 2008 Marco Martin <notmart@gmail.com>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as
+ *   published by the Free Software Foundation; either version 2, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include "busywidget.h"
+
+//Qt
+#include <QPainter>
+#include <QTimer>
+#include <QGraphicsSceneResizeEvent>
+
+//Plasma
+#include "plasma/theme.h"
+#include "plasma/svg.h"
+
+namespace Plasma
+{
+
+class BusyWidgetPrivate
+{
+public:
+    BusyWidgetPrivate()
+        : svg(0),
+          timerId(0)
+    {
+    }
+
+    ~BusyWidgetPrivate()
+    {
+    }
+
+    void themeChanged()
+    {
+        rotationAngle = svg->elementSize("hint-rotation-angle").width();
+    }
+
+    Svg *svg;
+    QString styleSheet;
+    int timerId;
+    qreal rotationAngle;
+    qreal rotation;
+};
+
+
+BusyWidget::BusyWidget(QGraphicsWidget *parent)
+    : QGraphicsWidget(parent),
+      d(new BusyWidgetPrivate)
+{
+    d->svg = new Plasma::Svg(this);
+    d->svg->setImagePath("widgets/busywidget");
+    d->svg->setContainsMultipleImages(true);
+    d->rotationAngle = d->svg->elementSize("hint-rotation-angle").width();
+
+    connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()), SLOT(themeChanged()));
+}
+
+BusyWidget::~BusyWidget()
+{
+    delete d;
+}
+
+void BusyWidget::timerEvent(QTimerEvent *event)
+{
+    Q_UNUSED(event)
+
+    d->rotation += d->rotationAngle;
+
+    qreal overflow = d->rotation - 360;
+    if ( overflow > 0) {
+        d->rotation = overflow;
+    }
+    update();
+}
+
+void BusyWidget::paint(QPainter *painter,
+                    const QStyleOptionGraphicsItem *option,
+                    QWidget *widget)
+{
+    Q_UNUSED(option)
+    Q_UNUSED(widget)
+
+    QPointF translatedPos(size().width()/2.0, size().height()/2.0);
+
+    painter->save();
+    painter->setRenderHints(QPainter::SmoothPixmapTransform);
+    painter->translate(translatedPos);
+
+    painter->save();
+    painter->translate(2,2);
+    painter->rotate(d->rotation);
+    d->svg->paint(painter, QRect(-translatedPos.toPoint(), size().toSize()), "busywidget-shadow");
+    painter->restore();
+
+    painter->rotate(d->rotation);
+    d->svg->paint(painter, QRect(-translatedPos.toPoint(), size().toSize()), "busywidget");
+    painter->restore();
+}
+
+void BusyWidget::showEvent(QShowEvent *event)
+{
+    Q_UNUSED(event)
+    d->timerId = startTimer(150);
+}
+
+void BusyWidget::hideEvent(QHideEvent *event)
+{
+    Q_UNUSED(event)
+    killTimer(d->timerId);
+    d->timerId = 0;
+}
+
+} // namespace Plasma
+
+#include <busywidget.moc>
+

widgets/busywidget.h

@@ -0,0 +1,73 @@
+/*
+ *   Copyright 2008 Marco Martin <notmart@gmail.com>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as
+ *   published by the Free Software Foundation; either version 2, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef PLASMA_BUSYWIDGET_H
+#define PLASMA_BUSYWIDGET_H
+
+#include <QtGui/QGraphicsWidget>
+
+#include <plasma/plasma_export.h>
+
+class QFrame;
+
+namespace Plasma
+{
+
+class BusyWidgetPrivate;
+
+/**
+ * @class BusyWidget plasma/widgets/spinner.h <Plasma/Widgets/BusyWidget>
+ *
+ * @short A widget that provides a waiting spinner
+ *
+ * A simple spinner widget that can be used to represent a wait of unknown length
+ */
+class PLASMA_EXPORT BusyWidget : public QGraphicsWidget
+{
+    Q_OBJECT
+
+public:
+    /**
+     * Constructs a new BusyWidget
+     *
+     * @arg parent the parent of this widget
+     */
+    explicit BusyWidget(QGraphicsWidget *parent = 0);
+    ~BusyWidget();
+
+protected:
+    void paint(QPainter *painter,
+               const QStyleOptionGraphicsItem *option,
+               QWidget *widget = 0);
+
+    void showEvent(QShowEvent *event);
+    void hideEvent(QHideEvent *event);
+
+protected Q_SLOTS:
+    void timerEvent(QTimerEvent *event);
+
+private:
+    BusyWidgetPrivate * const d;
+
+    Q_PRIVATE_SLOT(d, void themeChanged())
+};
+
+} // namespace Plasma
+
+#endif // multiple inclusion guard