TreeViewDelegate: allow app to add custom pointer handlers

As it stood, it was not possible to add custom pointer handlers
to a TreeViewDelegate, to e.g do an expandRecursive() if using the
right mouse button, or holding down ctrl during a click.

This patch will change this, so that we only perform the default
collapse/expand operations when using a plain left (double)
click, and ignore the event otherwise.

Change-Id: Ifbdf0903158b65c50d0e36e98ab7e48efaa3e3ab
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
(cherry picked from commit 2014101583b89128960f645e57192d1d475767e6)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 9 insertions, 6 deletions

diff --git a/tests/manual/treeview/sidebyside/data/treeview.qml b/tests/manual/treeview/sidebyside/data/treeview.qml
index 6587e11f6e..0e97e23a96 100644
--- a/tests/manual/treeview/sidebyside/data/treeview.qml
+++ b/tests/manual/treeview/sidebyside/data/treeview.qml
@@ -114,15 +114,18 @@ ApplicationWindow {
         id: testModel
     }
 
-    Rectangle {
-        anchors.fill: parent
-        color: "white"
-        z: -1
-    }
-
     Component {
         id: treeViewDelegate
         TreeViewDelegate {
+            TapHandler {
+                acceptedModifiers: Qt.ControlModifier
+                onTapped: {
+                    if (treeView.isExpanded(row))
+                        treeView.collapseRecursively(row)
+                    else
+                        treeView.expandRecursively(row)
+                }
+            }
         }
     }