REAL maxOpacity from plasma panel backgrounds

--Plasma::ExtendedTheme class now provides maximum
opacity provided by panel backgrounds

app/plasma/extended/theme.cpp

@@ -144,9 +144,24 @@ void Theme::setOutlineWidth(int width)
     emit outlineWidthChanged();
 }
 
-float Theme::backgroundMaxOpacity() const
+float Theme::bottomEdgeMaxOpacity() const
 {
-    return m_backgroundMaxOpacity;
+    return m_bottomEdgeMaxOpacity;
+}
+
+float Theme::leftEdgeMaxOpacity() const
+{
+    return m_leftEdgeMaxOpacity;
+}
+
+float Theme::topEdgeMaxOpacity() const
+{
+    return m_topEdgeMaxOpacity;
+}
+
+float Theme::rightEdgeMaxOpacity() const
+{
+    return m_rightEdgeMaxOpacity;
 }
 
 WindowSystem::SchemeColors *Theme::defaultTheme() const
@@ -315,6 +330,16 @@ int Theme::roundness(const QImage &svgImage, Plasma::Types::Location edge)
 
     int maxOpacity = qMin(qAlpha(svgImage.pixel(49,0)), 200);
 
+    if (edge == Plasma::Types::BottomEdge) {
+        m_bottomEdgeMaxOpacity = (float)maxOpacity / (float)255;
+    } else if (edge == Plasma::Types::LeftEdge) {
+        m_leftEdgeMaxOpacity = (float)maxOpacity / (float)255;
+    } else if (edge == Plasma::Types::TopEdge) {
+        m_topEdgeMaxOpacity = (float)maxOpacity / (float)255;
+    } else if (edge == Plasma::Types::RightEdge) {
+        m_rightEdgeMaxOpacity = (float)maxOpacity / (float)255;
+    }
+
     if (edge == Plasma::Types::BottomEdge || edge == Plasma::Types::RightEdge || edge == Plasma::Types::TopEdge) {
         //! TOPLEFT corner
         //! first LEFT pixel found
@@ -412,6 +437,7 @@ void Theme::loadRoundness()
 {
     loadCompositingRoundness();
 
+    emit maxOpacityChanged();
     emit roundnessChanged();
 }
 
@@ -564,12 +590,12 @@ void Theme::parseThemeSvgFiles()
             }
         }
 
-        m_backgroundMaxOpacity = opacity * fillOpacity;
+      //  m_backgroundMaxOpacity = opacity * fillOpacity;
 
-        qDebug() << "plasma theme opacity :: " << m_backgroundMaxOpacity << " from : " << opacity << " * " << fillOpacity;
+      //  qDebug() << "plasma theme opacity :: " << m_backgroundMaxOpacity << " from : " << opacity << " * " << fillOpacity;
     }
 
-    emit backgroundMaxOpacityChanged();
+ //   emit backgroundMaxOpacityChanged();
 }
 
 void Theme::loadThemeLightness()

app/plasma/extended/theme.h

@@ -60,7 +60,10 @@ class Theme: public QObject
 
     Q_PROPERTY(int outlineWidth READ outlineWidth NOTIFY outlineWidthChanged)
 
-    Q_PROPERTY(float backgroundMaxOpacity READ backgroundMaxOpacity NOTIFY backgroundMaxOpacityChanged)
+    Q_PROPERTY(float bottomEdgeMaxOpacity READ bottomEdgeMaxOpacity NOTIFY maxOpacityChanged)
+    Q_PROPERTY(float leftEdgeMaxOpacity READ leftEdgeMaxOpacity NOTIFY maxOpacityChanged)
+    Q_PROPERTY(float topEdgeMaxOpacity READ topEdgeMaxOpacity NOTIFY maxOpacityChanged)
+    Q_PROPERTY(float rightEdgeMaxOpacity READ rightEdgeMaxOpacity NOTIFY maxOpacityChanged)
 
     Q_PROPERTY(Latte::WindowSystem::SchemeColors *defaultTheme READ defaultTheme NOTIFY themeChanged)
     Q_PROPERTY(Latte::WindowSystem::SchemeColors *lightTheme READ lightTheme NOTIFY themeChanged)
@@ -82,7 +85,10 @@ public:
     int outlineWidth() const;
     void setOutlineWidth(int width);
 
-    float backgroundMaxOpacity() const;
+    float bottomEdgeMaxOpacity() const;
+    float leftEdgeMaxOpacity() const;
+    float topEdgeMaxOpacity() const;
+    float rightEdgeMaxOpacity() const;
 
     WindowSystem::SchemeColors *defaultTheme() const;
     WindowSystem::SchemeColors *lightTheme() const;
@@ -91,9 +97,9 @@ public:
     void load();
 
 signals:
-    void backgroundMaxOpacityChanged();
     void compositingChanged();
     void hasShadowChanged();
+    void maxOpacityChanged();
     void outlineWidthChanged();
     void roundnessChanged();
     void themeChanged();
@@ -128,7 +134,10 @@ private:
 
     int m_outlineWidth{1};
 
-    float m_backgroundMaxOpacity{1};
+    float m_bottomEdgeMaxOpacity{1};
+    float m_leftEdgeMaxOpacity{1};
+    float m_topEdgeMaxOpacity{1};
+    float m_rightEdgeMaxOpacity{1};
 
     QString m_themePath;
     QString m_themeWidgetsPath;