Introducing icon theme support

Added some static functions to QIcon to support desktop
themes based on the freedesktop spec. It is not intended to
replace KIcon and the intention is to use it when available to
share icon cache between applications.

Applications currently using icon themes are Assistant, Designer
and the textedit demo.

Reviewed-by: ogoffart

1 files changed, 56 insertions, 40 deletions

diff --git a/src/gui/styles/qgtkstyle.cpp b/src/gui/styles/qgtkstyle.cpp
index 660b4c3..f6d8c88 100644
--- a/src/gui/styles/qgtkstyle.cpp
+++ b/src/gui/styles/qgtkstyle.cpp
@@ -3239,6 +3239,7 @@ QSize QGtkStyle::sizeFromContents(ContentsType type, const QStyleOption *option,
     return newSize;
 }
 
+
 /*! \reimp */
 QPixmap QGtkStyle::standardPixmap(StandardPixmap sp, const QStyleOption *option,
                                   const QWidget *widget) const
@@ -3271,65 +3272,80 @@ QPixmap QGtkStyle::standardPixmap(StandardPixmap sp, const QStyleOption *option,
     }
     break;
 
-    case SP_DialogDiscardButton: {
+    case SP_DialogDiscardButton:
         return QGtkPainter::getIcon(GTK_STOCK_DELETE);
-    }
-
-    case SP_DialogOkButton: {
+    case SP_DialogOkButton:
         return QGtkPainter::getIcon(GTK_STOCK_OK);
-    }
-
-    case SP_DialogCancelButton: {
+    case SP_DialogCancelButton:
         return QGtkPainter::getIcon(GTK_STOCK_CANCEL);
-    }
-
-    case SP_DialogYesButton: {
+    case SP_DialogYesButton:
         return QGtkPainter::getIcon(GTK_STOCK_YES);
-    }
-
-    case SP_DialogNoButton: {
+    case SP_DialogNoButton:
         return QGtkPainter::getIcon(GTK_STOCK_NO);
-    }
-
-    case SP_DialogOpenButton: {
+    case SP_DialogOpenButton:
         return QGtkPainter::getIcon(GTK_STOCK_OPEN);
-    }
-
-    case SP_DialogCloseButton: {
+    case SP_DialogCloseButton:
         return QGtkPainter::getIcon(GTK_STOCK_CLOSE);
-    }
-
-    case SP_DialogApplyButton: {
+    case SP_DialogApplyButton:
         return QGtkPainter::getIcon(GTK_STOCK_APPLY);
-    }
-
-    case SP_DialogSaveButton: {
+    case SP_DialogSaveButton:
         return QGtkPainter::getIcon(GTK_STOCK_SAVE);
-    }
-
-    case SP_MessageBoxWarning: {
+    case SP_MessageBoxWarning:
         return QGtkPainter::getIcon(GTK_STOCK_DIALOG_WARNING, GTK_ICON_SIZE_DIALOG);
-    }
-
-    case SP_MessageBoxQuestion: {
+    case SP_MessageBoxQuestion:
         return QGtkPainter::getIcon(GTK_STOCK_DIALOG_QUESTION, GTK_ICON_SIZE_DIALOG);
-    }
-
-    case SP_MessageBoxInformation: {
+    case SP_MessageBoxInformation:
         return QGtkPainter::getIcon(GTK_STOCK_DIALOG_INFO, GTK_ICON_SIZE_DIALOG);
-    }
-
-    case SP_MessageBoxCritical: {
+    case SP_MessageBoxCritical:
         return QGtkPainter::getIcon(GTK_STOCK_DIALOG_ERROR, GTK_ICON_SIZE_DIALOG);
-    }
-
     default:
         return QCleanlooksStyle::standardPixmap(sp, option, widget);
     }
+    return pixmap;
+}
 
-    return QPixmap();
+/*!
+    \internal
+*/
+QIcon QGtkStyle::standardIconImplementation(StandardPixmap standardIcon,
+                                                  const QStyleOption *option,
+                                                  const QWidget *widget) const
+{
+    if (!QGtk::isThemeAvailable())
+        return QCleanlooksStyle::standardIconImplementation(standardIcon, option, widget);
+    switch (standardIcon) {
+    case SP_DialogDiscardButton:
+        return QGtkPainter::getIcon(GTK_STOCK_DELETE);
+    case SP_DialogOkButton:
+        return QGtkPainter::getIcon(GTK_STOCK_OK);
+    case SP_DialogCancelButton:
+        return QGtkPainter::getIcon(GTK_STOCK_CANCEL);
+    case SP_DialogYesButton:
+        return QGtkPainter::getIcon(GTK_STOCK_YES);
+    case SP_DialogNoButton:
+        return QGtkPainter::getIcon(GTK_STOCK_NO);
+    case SP_DialogOpenButton:
+        return QGtkPainter::getIcon(GTK_STOCK_OPEN);
+    case SP_DialogCloseButton:
+        return QGtkPainter::getIcon(GTK_STOCK_CLOSE);
+    case SP_DialogApplyButton:
+        return QGtkPainter::getIcon(GTK_STOCK_APPLY);
+    case SP_DialogSaveButton:
+        return QGtkPainter::getIcon(GTK_STOCK_SAVE);
+    case SP_MessageBoxWarning:
+        return QGtkPainter::getIcon(GTK_STOCK_DIALOG_WARNING, GTK_ICON_SIZE_DIALOG);
+    case SP_MessageBoxQuestion:
+        return QGtkPainter::getIcon(GTK_STOCK_DIALOG_QUESTION, GTK_ICON_SIZE_DIALOG);
+    case SP_MessageBoxInformation:
+        return QGtkPainter::getIcon(GTK_STOCK_DIALOG_INFO, GTK_ICON_SIZE_DIALOG);
+    case SP_MessageBoxCritical:
+        return QGtkPainter::getIcon(GTK_STOCK_DIALOG_ERROR, GTK_ICON_SIZE_DIALOG);
+    default:
+        return QCleanlooksStyle::standardIconImplementation(standardIcon, option, widget);
+    }
 }
 
+
 /*! \reimp */
 QRect QGtkStyle::subElementRect(SubElement element, const QStyleOption *option, const QWidget *widget) const
 {