fix #194,the user can enable a solid background

--this is especial useful for plasma themes with big
transparency. Latte can not support blur and background
contrast kwin effects for panel backgrounds that are drawn
inside its qml side.

app/dockcorona.cpp

@@ -245,7 +245,7 @@ QRegion DockCorona::availableScreenRegion(int id) const
 
                             case Latte::Dock::Center:
                             case Latte::Dock::Justify:
-                                realGeometry = QRect(view->geometry().center().x() - realWidth / 2 , view->y(),
+                                realGeometry = QRect(qMax(view->geometry().x(), view->geometry().center().x() - realWidth / 2) , view->y(),
                                                      realWidth , realThickness);
                                 break;
 
@@ -295,9 +295,11 @@ QRegion DockCorona::availableScreenRegion(int id) const
     }
 
     /*qDebug() << "::::: FREE AREAS :::::";
+
     for (int i = 0; i < available.rectCount(); ++i) {
         qDebug() << available.rects().at(i);
     }
+
     qDebug() << "::::: END OF FREE AREAS :::::";*/
 
     return available;

containment/contents/config/main.xml

@@ -34,6 +34,9 @@
     <entry name="panelSize" type="Int">
       <default>58</default>
     </entry>
+    <entry name="solidPanel" type="Bool">
+      <default>false</default>
+    </entry>
     <entry name="automaticIconSize" type="Bool">
       <default>false</default>
     </entry>

containment/contents/ui/PanelBox.qml

@@ -99,8 +99,10 @@ Item{
     PlasmaCore.FrameSvgItem{
         id: shadowsSvgItem
 
-        width: root.isVertical ? panelSize + marginsWidth : Math.min(parent.width + marginsWidth, root.width - marginsWidth)
-        height: root.isVertical ? Math.min(parent.height + marginsHeight, root.height - marginsHeight) : panelSize + marginsHeight
+        width: root.isVertical ? panelSize + marginsWidth - (solidBackground.leftIncreaser + solidBackground.rightIncreaser) :
+                                 Math.min(parent.width + marginsWidth, root.width - marginsWidth)
+        height: root.isVertical ? Math.min(parent.height + marginsHeight, root.height - marginsHeight) :
+                                  panelSize + marginsHeight - (solidBackground.topIncreaser + solidBackground.bottomIncreaser)
 
         imagePath: root.drawShadowsExternal ? "" : "widgets/panel-background"
         prefix: root.drawShadowsExternal ? "" : "shadow"
@@ -194,13 +196,44 @@ Item{
 
         PlasmaCore.FrameSvgItem{
             id: solidBackground
-            anchors.leftMargin: shadowsSvgItem.margins.left
-            anchors.rightMargin: shadowsSvgItem.margins.right
-            anchors.topMargin: shadowsSvgItem.margins.top
-            anchors.bottomMargin: shadowsSvgItem.margins.bottom
+            anchors.leftMargin: shadowsSvgItem.margins.left - leftIncreaser
+            anchors.rightMargin: shadowsSvgItem.margins.right - rightIncreaser
+            anchors.topMargin: shadowsSvgItem.margins.top - topIncreaser
+            anchors.bottomMargin: shadowsSvgItem.margins.bottom - bottomIncreaser
             anchors.fill:parent
 
-            imagePath: "widgets/panel-background"
+            imagePath: root.solidPanel ? "opaque/dialogs/background" : "widgets/panel-background"
+
+            //! the increases used when the user forces a solid background and the background
+            //! must be increased in order to look ok in the corners
+            property int rightIncreaser: {
+                if (!(root.solidPanel && root.isVertical && plasmoid.location === PlasmaCore.Types.LeftEdge))
+                    return 0;
+                else
+                    return hiddenPanelBackground.margins.right;
+            }
+
+            property int leftIncreaser: {
+                if (!(root.solidPanel && root.isVertical && plasmoid.location === PlasmaCore.Types.RightEdge))
+                    return 0;
+                else
+                    return hiddenPanelBackground.margins.left;
+            }
+
+            property int topIncreaser: {
+                if (!(root.solidPanel && root.isVertical && plasmoid.location === PlasmaCore.Types.BottomEdge))
+                    return 0;
+                else
+                    return hiddenPanelBackground.margins.top;
+            }
+
+            property int bottomIncreaser: {
+                if (!(root.solidPanel && root.isVertical && plasmoid.location === PlasmaCore.Types.TopEdge))
+                    return 0;
+                else
+                    return hiddenPanelBackground.margins.bottom;
+            }
+
 
             Binding {
                 target: root
@@ -258,7 +291,12 @@ Item{
                     prefix = "";
                 }
             }
+        }
 
+        PlasmaCore.FrameSvgItem{
+            id: hiddenPanelBackground
+            imagePath: "widgets/panel-background"
+            visible: false
         }
     }
 
@@ -484,3 +522,4 @@ Item{
     //END states
 }
 
+

containment/contents/ui/main.qml

@@ -50,7 +50,7 @@ DragDrop.DropArea {
     property bool confirmedDragEntered: false
     property bool drawShadowsExternal: visibilityManager.panelIsBiggerFromIconSize && (zoomFactor === 1.0)
                                        && (dock.visibility.mode === Latte.Dock.AlwaysVisible)
-                                       && (plasmoid.configuration.panelPosition === Latte.Dock.Justify)
+                                       && (plasmoid.configuration.panelPosition === Latte.Dock.Justify) && !root.solidPanel
 
     property bool editMode: plasmoid.userConfiguring
     property bool immutable: plasmoid.immutable
@@ -61,6 +61,7 @@ DragDrop.DropArea {
                                          : (layoutsContainer.hoveredIndex !== -1) //|| wholeArea.containsMouse
     property bool normalState : false
     property bool onlyAddingStarup: true //is used for the initialization phase in startup where there arent removals, this variable provides a way to grow icon size
+    property bool solidPanel: plasmoid.configuration.solidPanel
     //FIXME: possibly this is going to be the default behavior, this user choice
     //has been dropped from the Dock Configuration Window
     //property bool smallAutomaticIconJumps: plasmoid.configuration.smallAutomaticIconJumps

shell/contents/configuration/AppearanceConfig.qml

@@ -227,9 +227,18 @@ PlasmaComponents.Page {
                 text: i18n("Background")
             }
 
+            GridLayout {
+                width: parent.width
+                rowSpacing: 1
+                columnSpacing: 1
+                Layout.leftMargin: units.smallSpacing * 2
+                Layout.rightMargin: units.smallSpacing * 2
+
+                columns: 2
+
                 PlasmaComponents.CheckBox {
                     id: showBackground
-                Layout.leftMargin: units.smallSpacing * 2
+                    Layout.fillWidth: true
                     text: i18n("Show Panel Background")
                     checked: plasmoid.configuration.useThemePanel
 
@@ -238,6 +247,21 @@ PlasmaComponents.Page {
                     }
                 }
 
+                PlasmaComponents.CheckBox {
+                    id: solidBackground
+                    Layout.fillWidth: true
+                    Layout.alignment: Qt.AlignHCenter
+
+                    text: i18n("Solid Background")
+                    checked: plasmoid.configuration.solidPanel
+                    enabled: showBackground.checked
+
+                    onClicked: {
+                        plasmoid.configuration.solidPanel = checked
+                    }
+                }
+            }
+
             RowLayout {
                 Layout.fillWidth: true
                 Layout.leftMargin: units.smallSpacing * 2