From 5f3a757bae315e2b4d2a09bc04e16d51657b7cd8 Mon Sep 17 00:00:00 2001
From: Marco Martin <notmart@gmail.com>
Date: Tue, 27 May 2008 10:57:09 +0000
Subject: [PATCH] new BackgroundHint: TranslucentBackground, now used by folder
 view. when an applet has TranslucentBackground set, it loads
 "widgets/tranlucentbackground" as its own background when that svg does not
 exists in theh them it falls back to "widgets/background" instead of
 translucentbackground of the default theme

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=813283
---
 applet.cpp | 36 +++++++++++++++++++++++++-----------
 applet.h   |  5 +++--
 2 files changed, 28 insertions(+), 13 deletions(-)

diff --git a/applet.cpp b/applet.cpp
index 7bf37f6c9..3e6195425 100644
--- a/applet.cpp
+++ b/applet.cpp
@@ -540,20 +540,31 @@ void Applet::setBackgroundHints(const BackgroundHints hints)
     d->backgroundHints = hints;
 
     //Draw the standard background?
-    if (hints & StandardBackground) {
+    if ((hints & StandardBackground) || (hints & TranslucentBackground)) {
         if (!d->background) {
             d->background = new Plasma::PanelSvg();
-            d->background->setImagePath("widgets/background");
-            d->background->setEnabledBorders(Plasma::PanelSvg::AllBorders);
-            qreal left, top, right, bottom;
-            d->background->getMargins(left, top, right, bottom);
-            setContentsMargins(left, right, top, bottom);
-            QSizeF fitSize(left + right, top + bottom);
-            if (minimumSize().expandedTo(fitSize) != minimumSize()) {
-                setMinimumSize(minimumSize().expandedTo(fitSize));
-            }
-            d->background->resizePanel(boundingRect().size());
         }
+
+        if (hints & TranslucentBackground) {
+            d->background->setImagePath("widgets/translucentbackground");
+            
+            //FIXME: this fallback is an hack, an api like Plasma::Theme::hasImage() would be needed to make this clean
+            if (!Plasma::Theme::defaultTheme()->imagePath("widgets/translucentbackground").contains(Plasma::Theme::defaultTheme()->themeName())) {
+                d->background->setImagePath("widgets/background");
+            }
+        } else {
+            d->background->setImagePath("widgets/background");
+        }
+
+        d->background->setEnabledBorders(Plasma::PanelSvg::AllBorders);
+        qreal left, top, right, bottom;
+        d->background->getMargins(left, top, right, bottom);
+        setContentsMargins(left, right, top, bottom);
+        QSizeF fitSize(left + right, top + bottom);
+        if (minimumSize().expandedTo(fitSize) != minimumSize()) {
+            setMinimumSize(minimumSize().expandedTo(fitSize));
+        }
+        d->background->resizePanel(boundingRect().size());
     } else if (d->background) {
         qreal left, top, right, bottom;
         d->background->getMargins(left, top, right, bottom);
@@ -1597,6 +1608,9 @@ void Applet::Private::checkImmutability()
 void Applet::Private::themeChanged()
 {
     if (background) {
+        //do again the translucent background fallback
+        q->setBackgroundHints(backgroundHints);
+
         qreal left;
         qreal right;
         qreal top;
diff --git a/applet.h b/applet.h
index 53fa62065..ef8c78e6b 100644
--- a/applet.h
+++ b/applet.h
@@ -82,8 +82,9 @@ class PLASMA_EXPORT Applet : public QGraphicsWidget
          * Description on how draw a background for the applet
          */
         enum BackgroundHint { NoBackground = 0 /** Not drawing a background under the applet, the applet has its own implementation */,
-                              StandardBackground /** The standard background from the theme is drawn */,
-                              ShadowedBackground /** The applet has a drop shadow */,
+                              StandardBackground = 1 /** The standard background from the theme is drawn */,
+                              TranslucentBackground = 2 /** An alternate version of the background is drawn, usually more translucent */,
+                              ShadowedBackground = 4 /** The applet has a drop shadow */,
                               DefaultBackground = StandardBackground | ShadowedBackground /** Default settings: both standard background and shadow */
                             };
         Q_DECLARE_FLAGS(BackgroundHints, BackgroundHint)