From 22a5e87979d58eca50eaa8220cd0189f2092d44c Mon Sep 17 00:00:00 2001
From: Christian Muehlhaeuser <muesli@gmail.com>
Date: Tue, 12 Aug 2014 19:52:15 +0200
Subject: [PATCH] * Added BackgroundWidget, a widget that can display a
 (blurred) background image and thoughtfully reacts to size changes.

---
 src/libtomahawk/widgets/BackgroundWidget.cpp | 99 ++++++++++++++++++++
 src/libtomahawk/widgets/BackgroundWidget.h   | 49 ++++++++++
 2 files changed, 148 insertions(+)
 create mode 100644 src/libtomahawk/widgets/BackgroundWidget.cpp
 create mode 100644 src/libtomahawk/widgets/BackgroundWidget.h

diff --git a/src/libtomahawk/widgets/BackgroundWidget.cpp b/src/libtomahawk/widgets/BackgroundWidget.cpp
new file mode 100644
index 000000000..d84185e36
--- /dev/null
+++ b/src/libtomahawk/widgets/BackgroundWidget.cpp
@@ -0,0 +1,99 @@
+/* === This file is part of Tomahawk Player - <http://tomahawk-player.org> ===
+ *
+ *   Copyright 2014, Christian Muehlhaeuser <muesli@tomahawk-player.org>
+ *
+ *   Tomahawk is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Tomahawk 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 General Public License
+ *   along with Tomahawk. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "BackgroundWidget.h"
+
+#include "utils/TomahawkUtilsGui.h"
+#include "utils/Logger.h"
+
+#include <QWidget>
+#include <QPixmap>
+#include <QPaintEvent>
+#include <QPainter>
+
+using namespace Tomahawk;
+
+
+BackgroundWidget::BackgroundWidget( QWidget* parent )
+    : QWidget( parent )
+{
+    setAutoFillBackground( false );
+}
+
+
+BackgroundWidget::~BackgroundWidget()
+{
+}
+
+
+void
+BackgroundWidget::setBackground( const QPixmap& p, bool blurred, bool blackWhite )
+{
+    if ( blurred )
+    {
+        m_background = QPixmap::fromImage( TomahawkUtils::blurred( p.toImage(), p.rect(), 10, false, blackWhite ) );
+    }
+    else
+    {
+        m_background = p;
+    }
+
+    m_backgroundSlice = QPixmap();
+    repaint();
+}
+
+
+void
+BackgroundWidget::setBackgroundColor( const QColor& c )
+{
+    m_backgroundColor = c;
+}
+
+
+void
+BackgroundWidget::resizeEvent( QResizeEvent* event )
+{
+    QWidget::resizeEvent( event );
+    m_backgroundSlice = QPixmap();
+}
+
+
+void
+BackgroundWidget::paintEvent( QPaintEvent* event )
+{
+    QPainter painter( this );
+
+    painter.save();
+    painter.setPen( m_backgroundColor );
+    painter.setBrush( m_backgroundColor );
+    painter.drawRect( event->rect() );
+    painter.restore();
+
+    if ( m_backgroundSlice.isNull() && !m_background.isNull() )
+    {
+        m_backgroundSlice = m_background.scaledToWidth( contentsRect().width(), Qt::SmoothTransformation );
+        m_backgroundSlice = m_backgroundSlice.copy( 0, m_backgroundSlice.height() / 2 - contentsRect().height() / 2, m_backgroundSlice.width(), contentsRect().height() );
+    }
+
+    if ( !m_backgroundSlice.isNull() )
+    {
+        painter.drawPixmap( event->rect(), m_backgroundSlice.copy( event->rect() ) );
+    }
+
+    QWidget::paintEvent( event );
+}
diff --git a/src/libtomahawk/widgets/BackgroundWidget.h b/src/libtomahawk/widgets/BackgroundWidget.h
new file mode 100644
index 000000000..0a4281898
--- /dev/null
+++ b/src/libtomahawk/widgets/BackgroundWidget.h
@@ -0,0 +1,49 @@
+/* === This file is part of Tomahawk Player - <http://tomahawk-player.org> ===
+ *
+ *   Copyright 2014, Christian Muehlhaeuser <muesli@tomahawk-player.org>
+ *
+ *   Tomahawk is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Tomahawk 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 General Public License
+ *   along with Tomahawk. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef BACKGROUNDWIDGET_H
+#define BACKGROUNDWIDGET_H
+
+#include <QWidget>
+
+#include "DllMacro.h"
+
+class QPaintEvent;
+
+class DLLEXPORT BackgroundWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit BackgroundWidget( QWidget* parent = 0 );
+    virtual ~BackgroundWidget();
+
+public slots:
+    virtual void setBackground( const QPixmap& p, bool blurred = true, bool blackWhite = false );
+    virtual void setBackgroundColor( const QColor& c );
+
+protected:
+    virtual void resizeEvent( QResizeEvent* event );
+    virtual void paintEvent( QPaintEvent* event );
+
+private:
+    QColor m_backgroundColor;
+    QPixmap m_background;
+    QPixmap m_backgroundSlice;
+};
+
+#endif // BACKGROUNDWIDGET_H