From c135ebfcc5801a2275a57c041a5addc5f5b9755c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <kde@martin-graesslin.com>
Date: Sat, 1 May 2010 11:43:39 +0000
Subject: [PATCH] Aurorae supports painting a custom background behind the
 button group. Inspired by new Ubuntu Lucid Metacity themes.

svn path=/trunk/KDE/kdebase/workspace/; revision=1121484
---
 clients/aurorae/src/lib/auroraebutton.cpp | 49 +++++++++++++++++++++++
 clients/aurorae/src/lib/auroraebutton.h   | 16 ++++++++
 clients/aurorae/src/lib/auroraescene.cpp  |  4 +-
 3 files changed, 67 insertions(+), 2 deletions(-)

diff --git a/clients/aurorae/src/lib/auroraebutton.cpp b/clients/aurorae/src/lib/auroraebutton.cpp
index 10cfef511c..a2294ebd5d 100644
--- a/clients/aurorae/src/lib/auroraebutton.cpp
+++ b/clients/aurorae/src/lib/auroraebutton.cpp
@@ -37,6 +37,55 @@
 
 namespace Aurorae {
 
+AuroraeButtonGroup::AuroraeButtonGroup(AuroraeTheme *theme, AuroraeButtonGroup::ButtonGroup group)
+    : QGraphicsWidget()
+    , m_theme(theme)
+    , m_group(group)
+{
+}
+
+void AuroraeButtonGroup::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_UNUSED(option)
+    Q_UNUSED(widget)
+    Plasma::FrameSvg *decoration = m_theme->decoration();
+    QString basePrefix;
+    QString prefix;
+    AuroraeScene *s = static_cast<AuroraeScene*>(scene());
+    switch (m_group) {
+    case LeftGroup:
+        basePrefix = "buttongroup-left";
+        break;
+    case RightGroup:
+        basePrefix = "buttongroup-right";
+        break;
+    }
+    if (!decoration->hasElementPrefix(basePrefix)) {
+        return;
+    }
+    if (!s->isActive() && decoration->hasElementPrefix(basePrefix + "-inactive")) {
+        prefix = basePrefix + "-inactive";
+    } else {
+        prefix = basePrefix;
+    }
+    decoration->setElementPrefix(prefix);
+    decoration->setEnabledBorders(Plasma::FrameSvg::AllBorders);
+    decoration->resizeFrame(size());
+    if (s->isAnimating() && decoration->hasElementPrefix(basePrefix + "-inactive")) {
+        QPixmap target = decoration->framePixmap();
+        decoration->setElementPrefix(basePrefix + "-inactive");
+        if (!s->isActive()) {
+            decoration->setElementPrefix(basePrefix);
+        }
+        decoration->resizeFrame(size());
+        QPixmap result = Plasma::PaintUtils::transition(decoration->framePixmap(),
+                                                        target, s->animationProgress());
+        painter->drawPixmap(0, 0, result);
+    } else {
+        decoration->paintFrame(painter);
+    }
+}
+
 AuroraeButton::AuroraeButton(AuroraeTheme* theme, AuroraeButtonType type)
     : QGraphicsWidget()
     , m_theme(theme)
diff --git a/clients/aurorae/src/lib/auroraebutton.h b/clients/aurorae/src/lib/auroraebutton.h
index 846814e9dd..cc1f1f2512 100644
--- a/clients/aurorae/src/lib/auroraebutton.h
+++ b/clients/aurorae/src/lib/auroraebutton.h
@@ -36,6 +36,22 @@ namespace Aurorae {
 
 class AuroraeTheme;
 
+class AuroraeButtonGroup : public QGraphicsWidget
+{
+    Q_OBJECT
+public:
+    enum ButtonGroup {
+        LeftGroup = 0,
+        RightGroup
+    };
+    AuroraeButtonGroup(AuroraeTheme *theme, ButtonGroup group);
+    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
+
+private:
+    AuroraeTheme *m_theme;
+    ButtonGroup m_group;
+};
+
 class AuroraeButton : public QGraphicsWidget
 {
     Q_OBJECT
diff --git a/clients/aurorae/src/lib/auroraescene.cpp b/clients/aurorae/src/lib/auroraescene.cpp
index 33de82b474..c69b6fc4d7 100644
--- a/clients/aurorae/src/lib/auroraescene.cpp
+++ b/clients/aurorae/src/lib/auroraescene.cpp
@@ -88,7 +88,7 @@ void AuroraeScene::init()
     leftButtonsLayout->setOrientation(orientation);
     initButtons(leftButtonsLayout, buttonsToDirection(m_leftButtonOrder));
 
-    m_leftButtons = new QGraphicsWidget;
+    m_leftButtons = new AuroraeButtonGroup(m_theme, AuroraeButtonGroup::LeftGroup);
     m_leftButtons->setLayout(leftButtonsLayout);
     addItem(m_leftButtons);
 
@@ -99,7 +99,7 @@ void AuroraeScene::init()
     rightButtonsLayout->setOrientation(orientation);
     initButtons(rightButtonsLayout, buttonsToDirection(m_rightButtonOrder));
 
-    m_rightButtons = new QGraphicsWidget;
+    m_rightButtons = new AuroraeButtonGroup(m_theme, AuroraeButtonGroup::RightGroup);
     m_rightButtons->setLayout(rightButtonsLayout);
     addItem(m_rightButtons);