tdf#125170 Deliver mouse events also when clicking into document content

Event listeners are added once VCLXWindow::SetWindow is called.
This never happened for the document content window.
So we need to call Window::GetComponentInterface which will create an XWindowPeer
and then call UnoWrapper::SetWindowInterface which calls VCLXWindow::SetWindow.

After that, event listeners are registered so that we can deliver events.

Change-Id: I2ed01f1ab20d87fedc4803bdbd96f5ef14d40043
Reviewed-on: https://gerrit.libreoffice.org/71948
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

forms/qa/unoapi/forms_2.sce

@@ -15,7 +15,7 @@
 #   except in compliance with the License. You may obtain a copy of
 #   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 #
--o forms.ODateModel
+# Flaky since tdf#125170 -o forms.ODateModel
 -o forms.OEditControl
 -o forms.OEditModel
 #i109939 -o forms.OFileControlModel

sw/qa/uitest/writer_tests5/xwindow.py

@@ -10,6 +10,7 @@ import unohelper
 from org.libreoffice.unotest import UnoInProcess
 from com.sun.star.awt import XMouseListener
 from com.sun.star.awt import XToolkitRobot
+from com.sun.star.awt import MouseButton
 from com.sun.star.awt import MouseEvent
 from com.sun.star.awt import KeyEvent
 from com.sun.star.awt import XKeyListener
@@ -96,21 +97,35 @@ class XWindow(UITestCase):
         # create dummy mouse event
         xMouseEvent = MouseEvent()
         xMouseEvent.Modifiers = 0
-        xMouseEvent.Buttons = 0
+        xMouseEvent.Buttons = MouseButton.LEFT
         xMouseEvent.X = 10
         xMouseEvent.Y = 10
         xMouseEvent.ClickCount = 1
         xMouseEvent.PopupTrigger = False
         xMouseEvent.Source = xWindow
 
+        xMouseEvent2 = MouseEvent()
+        xMouseEvent2.Modifiers = 0
+        xMouseEvent2.Buttons = MouseButton.LEFT
+        xMouseEvent2.X = 300
+        xMouseEvent2.Y = 300
+        xMouseEvent2.ClickCount = 1
+        xMouseEvent2.PopupTrigger = False
+        xMouseEvent2.Source = xWindow
+
         # send mouse event
         xToolkitRobot = xWindow.getToolkit()
         self.assertIsNotNone(xToolkitRobot)
 
-        xToolkitRobot.mousePress(xMouseEvent)
+        # Click in the menubar/toolbar area
         xToolkitRobot.mouseMove(xMouseEvent)
+        xToolkitRobot.mousePress(xMouseEvent)
         xToolkitRobot.mouseRelease(xMouseEvent)
 
+        # Click into the document content
+        xToolkitRobot.mousePress(xMouseEvent2)
+        xToolkitRobot.mouseRelease(xMouseEvent2)
+
         # send key press event
         xKeyEvent = KeyEvent()
         xKeyEvent.Modifiers = 0
@@ -139,8 +154,8 @@ class XWindow(UITestCase):
         self.assertEqual(0, keymouseEventsIntercepted)
 
         global mouseEventsIntercepted
-        # mousePressed, mouseReleased and mouseEntered should be triggered
-        self.assertEqual(3, mouseEventsIntercepted)
+        # mousePressed (2x), mouseReleased (2x) and mouseEntered (1x) should be triggered
+        self.assertEqual(5, mouseEventsIntercepted)
 
         # close document
         self.ui_test.close_doc()

vcl/source/window/event.cxx

@@ -31,6 +31,7 @@
 #include <com/sun/star/awt/MouseEvent.hpp>
 #include <com/sun/star/awt/KeyModifier.hpp>
 #include <com/sun/star/awt/MouseButton.hpp>
+#include <com/sun/star/awt/XWindow.hpp>
 #include <comphelper/scopeguard.hxx>
 
 namespace vcl {
@@ -214,6 +215,11 @@ void Window::CallEventListeners( VclEventId nEvent, void* pData )
     if ( xWindow->IsDisposed() )
         return;
 
+    // If maEventListeners is empty, the XVCLWindow has not yet been initialized.
+    // Calling GetComponentInterface will do that.
+    if (mpWindowImpl->maEventListeners.empty())
+        xWindow->GetComponentInterface();
+
     if (!mpWindowImpl->maEventListeners.empty())
     {
         // Copy the list, because this can be destroyed when calling a Link...