adjust borders when the panel moves

panelview.cpp

@@ -22,6 +22,8 @@
 #include <QAction>
 #include <QDebug>
 #include <QScreen>
+#include <QQmlEngine>
+#include <QQmlContext>
 
 #include <KActionCollection>
 #include <KWindowSystem>
@@ -100,6 +102,8 @@ void PanelView::init()
     }
 
     setResizeMode(View::SizeRootObjectToView);
+    qmlRegisterType<QScreen>();
+    engine()->rootContext()->setContextProperty("panel", this);
     setSource(QUrl::fromLocalFile(m_corona->package().filePath("views", "Panel.qml")));
     positionPanel();
 }

panelview.h

@@ -35,6 +35,7 @@ class PanelView : public View
     Q_PROPERTY(int length READ length WRITE setLength NOTIFY lengthChanged)
     Q_PROPERTY(int maximumLength READ maximumLength WRITE setMaximumLength NOTIFY maximumLengthChanged)
     Q_PROPERTY(int minimumLength READ minimumLength WRITE setMinimumLength NOTIFY minimumLengthChanged)
+    Q_PROPERTY(QScreen *screen READ screen /*NOTIFY screenChanged*/)
 
 public:
     explicit PanelView(DesktopCorona *corona, QWindow *parent = 0);

qmlpackages/desktop/contents/views/Panel.qml

@@ -30,6 +30,41 @@ PlasmaCore.FrameSvgItem {
 
     property Item containment
 
+    function adjustBorders() {
+        var borders = PlasmaCore.FrameSvg.AllBorders;
+
+        switch (containment.location) {
+        case PlasmaCore.Types.TopEdge:
+            borders = borders & ~PlasmaCore.FrameSvg.TopBorder;
+            break;
+        case PlasmaCore.Types.LeftEdge:
+            borders = borders & ~PlasmaCore.FrameSvg.LeftBorder;
+            break;
+        case PlasmaCore.Types.RightEdge:
+            borders = borders & ~PlasmaCore.FrameSvg.RightBorder;
+            break;
+        case PlasmaCore.Types.BottomEdge:
+        default:
+            borders = borders & ~PlasmaCore.FrameSvg.BottomBorder;
+            break;
+        }
+
+        if (panel.x <= panel.screen.geometry.x) {
+            borders = borders & ~PlasmaCore.FrameSvg.LeftBorder;
+        }
+        if (panel.x + panel.width >= panel.screen.geometry.x + panel.screen.geometry.width) {
+            borders = borders & ~PlasmaCore.FrameSvg.RightBorder;
+        }
+        if (panel.y <= panel.screen.geometry.y) {
+            borders = borders & ~PlasmaCore.FrameSvg.TopBorder;
+        }
+        if (panel.y + panel.height >= panel.screen.geometry.y + panel.screen.geometry.height) {
+            borders = borders & ~PlasmaCore.FrameSvg.BottomBorder;
+        }
+
+        root.enabledBorders = borders;
+    }
+
     onContainmentChanged: {
         print("New panel Containment: " + containment)
         //containment.parent = root
@@ -40,25 +75,30 @@ PlasmaCore.FrameSvgItem {
     Connections {
         target: containment
         onLocationChanged: {
-            var borders = PlasmaCore.FrameSvg.AllBorders;
+            adjustBorders()
+        }
+    }
 
-            switch (containment.location) {
-            case PlasmaCore.Types.TopEdge:
-                borders = borders & ~PlasmaCore.FrameSvg.TopBorder;
-                break;
-            case PlasmaCore.Types.LeftEdge:
-                borders = borders & ~PlasmaCore.FrameSvg.LeftBorder;
-                break;
-            case PlasmaCore.Types.RightEdge:
-                borders = borders & ~PlasmaCore.FrameSvg.RightBorder;
-                break;
-            case PlasmaCore.Types.BottomEdge:
-            default:
-                borders = borders & ~PlasmaCore.FrameSvg.BottomBorder;
-                break;
-            }
+    Connections {
+        target: panel
+        onXChanged: {
+            adjustBorders();
+        }
+        onYChanged: {
+            adjustBorders();
+        }
+        onWidthChanged: {
+            adjustBorders();
+        }
+        onHeightChanged: {
+            adjustBorders();
+        }
+    }
 
-            root.enabledBorders = borders;
+    Connections {
+        target: panel.screen
+        onGeometryChanged: {
+            adjustBorders();
         }
     }