Android "Back" button handling

touch/Dialog.qml

@@ -28,7 +28,11 @@ Rectangle {
 
     color: Constants.colors.dialogBackground
 
-    Component.onCompleted: pgst.dialogsVisible = pgst.dialogsVisible + 1;
+    Component.onCompleted: {
+        pgst.dialogsVisible = pgst.dialogsVisible + 1;
+        pgst.topOfStackChanged();
+    }
+
     Component.onDestruction: pgst.dialogsVisible = pgst.dialogsVisible - 1;
 
     default property alias children: contents.children

touch/DialogStacking.qml

@@ -48,6 +48,7 @@ Item {
 
     function startFadeOut() {
         fadeOut.start();
+        pgst.topOfStackChanged(-1);
         page.destroy(500);
     }
 

touch/Main.qml

@@ -53,7 +53,11 @@ Item {
                 break;
             case Qt.Key_Escape:
             case Qt.Key_Backspace:
-                backButton.clicked();
+            case Qt.Key_Back:
+                if (backButton.enabled) {
+                    backButton.clicked();
+                    event.accepted = true;
+                }
                 break;
             default:
                 break;
@@ -102,7 +106,7 @@ Item {
 
         var page = children[children.length+offset-1];
 
-        pgst.hasBackButton = Qt.binding(function () { return (!page.isDialog && page.canClose); });
+        pgst.hasBackButton = Qt.binding(function () { return page.isDialog || page.canClose; });
         pgst.hasMenuButton = Qt.binding(function () { return page.hasMenuButton; });
         pgst.menuButtonLabel = Qt.binding(function () { return pgst.hasMenuButton ? page.menuButtonLabel : 'Menu'; });
         pgst.menuButtonIcon = Qt.binding(function () { return pgst.hasMenuButton ? page.menuButtonIcon : Icons.vellipsis; });
@@ -191,6 +195,9 @@ Item {
                 text: 'Back'
                 icon: Icons.arrow_left
 
+                // Don't show back button on Android (Android has its own)
+                visible: (typeof(gpodderAndroid) === 'undefined')
+
                 enabled: pgst.hasBackButton
                 onClicked: {
                     if (enabled) {

touch/SlidePage.qml

@@ -39,7 +39,9 @@ Rectangle {
     signal menuButtonClicked()
 
     function closePage() {
-        stacking.startFadeOut();
+        if (canClose) {
+            stacking.startFadeOut();
+        }
     }
 
     onXChanged: pgst.update(page, x)