RoomList: Change room on drag enter

With a delay. Allows to drag a file to NeoChat and switch rooms.

In the future we might want to allow dropping a file onto a
room to send it.

src/rooms/RoomDelegate.qml

@@ -26,12 +26,15 @@ Delegates.RoundedItemDelegate {
     required property string displayName
 
     property bool openOnClick: true
+    property bool openOnDrag: false
     property bool showConfigure: true
 
     property bool collapsed: false
 
     readonly property bool hasNotifications: contextNotificationCount > 0
 
+    dropAreaHovered: dropArea.containsDrag
+
     Accessible.name: root.displayName
     Accessible.onPressAction: clicked()
 
@@ -57,6 +60,23 @@ Delegates.RoundedItemDelegate {
         onLongPressed: root.createRoomListContextMenu()
     }
 
+    DropArea {
+        id: dropArea
+        enabled: root.openOnDrag
+        anchors.fill: parent
+    }
+
+    Timer {
+        id: dragOpenTimer
+        running: dropArea.containsDrag
+        interval: Application.styleHints.mousePressAndHoldInterval
+        repeat: false
+        onTriggered: {
+            RoomManager.resolveResource(currentRoom.id);
+            pageStack.currentIndex = 1;
+        }
+    }
+
     contentItem: RowLayout {
         spacing: Kirigami.Units.largeSpacing
 

src/rooms/RoomListPage.qml

@@ -163,6 +163,7 @@ Kirigami.Page {
                             connection: root.connection
                             collapsed: root.collapsed
                             highlighted: RoomManager.currentRoom === currentRoom
+                            openOnDrag: true
                         }
                     }