homescreens/halcyon: switch page when trying to move out of the grids

components/mobileshell/qml/components/GridView.qml

@@ -13,6 +13,51 @@ GridView {
     highlightFollowsCurrentItem: true
     highlight: highlightComponent
 
+    /** These function are called when the user tries to move the highlight outside the allowed surface by using arrow keys.
+      * Useful to override the default behaviour of GridView (Pac-Man effect).
+      */
+    property var topEdgeCallback: null
+    property var bottomEdgeCallback: null
+    property var leftEdgeCallback: null
+    property var rightEdgeCallback: null
+
+    Keys.onPressed: event => {
+                        if (!currentItem) {
+                            return;
+                        }
+
+                        switch(event.key){
+                            case Qt.Key_Left: {
+                                if (currentItem.x === 0
+                                    && leftEdgeCallback) {
+                                    leftEdgeCallback();
+                                }
+                                break;
+                            }
+                            case Qt.Key_Right: {
+                                if (indexAt(currentItem.x + cellWidth, currentItem.y) === -1
+                                    && rightEdgeCallback) {
+                                    rightEdgeCallback();
+                                }
+                                break;
+                            }
+                            case Qt.Key_Up: {
+                                if (currentItem.y === 0
+                                    && topEdgeCallback) {
+                                    topEdgeCallback();
+                                }
+                                break;
+                            }
+                            case Qt.Key_Down: {
+                                if (indexAt(currentItem.x, currentItem.y + cellHeight) === -1
+                                    && bottomEdgeCallback) {
+                                    bottomEdgeCallback();
+                                }
+                                break;
+                            }
+                        }
+                    }
+
     onActiveFocusChanged: {
         if (!activeFocus) {
             currentIndex = -1;

containments/homescreens/halcyon/package/contents/ui/FavoritesView.qml

@@ -34,6 +34,7 @@ Item {
     property bool folderShown: false
     
     signal openConfigureRequested()
+    signal pageForwardRequested();
     
     Connections {
         target: parent
@@ -87,6 +88,10 @@ Item {
         transform: Translate { x: favoritesGrid.translateX }
         opacity: 1 - openFolderProgress
         visible: opacity !== 0
+
+        rightEdgeCallback: () => {
+                               pageForwardRequested();
+                           }
     }
  
     FolderGrid {

containments/homescreens/halcyon/package/contents/ui/HomeScreen.qml

@@ -93,6 +93,12 @@ Item {
                 searchWidget: root.searchWidget
                 interactive: root.interactive
                 onOpenConfigureRequested: root.openConfigure()
+
+                onPageForwardRequested: {
+                    swipeView.setCurrentIndex(1);
+                    swipeView.focusChild();
+                    resetHighlight();
+                }
             }
         }
 
@@ -111,6 +117,12 @@ Item {
                 interactive: root.interactive
                 leftMargin: horizontalMargin
                 rightMargin: horizontalMargin
+
+                leftEdgeCallback: () => {
+                                      swipeView.setCurrentIndex(0);
+                                      swipeView.focusChild();
+                                      currentIndex = -1;
+                                  }
             }
         }
     }