Force-fix window position offset of Carla-embed mouse events

source/native-plugins/resources/carla-plugin

@@ -405,48 +405,79 @@ class CarlaMiniW(ExternalUI, HostWindow):
 # ------------------------------------------------------------------------------------------------------------
 # Embed Widget
 
-if LINUX and config_UseQt5:
+if config_UseQt5 and LINUX:
     from PyQt5.QtGui import QMouseEvent
 
     class QEmbedWidget(QWidget):
-        def __init__(self):
+        def __init__(self, winId):
             QWidget.__init__(self)
             self.setAttribute(Qt.WA_LayoutUsesWidgetRect)
-
-            self.fPos = (0, 0)
             self.move(0, 0)
 
+            self.fPos = (0, 0)
             self.fWinId = 0
 
-        def eventFilter(self, obj, ev):
-            if isinstance(ev, QMouseEvent):
-                pos = gCarla.utils.x11_get_window_pos(self.fWinId)
-                if self.fPos != pos:
-                    self.fPos = pos
-                    self.move(pos[0], pos[1])
-                    gCarla.utils.x11_move_window(self.fWinId, 0, 0)
-            return False
+        def getWidget(self):
+            return self
 
         def finalSetup(self, gui, winId):
             self.fWinId = int(self.winId())
+            gui.ui.centralwidget.installEventFilter(self)
             gui.ui.menubar.installEventFilter(self)
             gCarla.utils.x11_reparent_window(self.fWinId, winId)
             self.show()
 
-elif LINUX and not config_UseQt5:
+        def fixPosition(self):
+            pos = gCarla.utils.x11_get_window_pos(self.fWinId)
+            if self.fPos == pos:
+                return
+            self.fPos = pos
+            self.move(pos[0], pos[1])
+            gCarla.utils.x11_move_window(self.fWinId, 0, 0)
+
+        def eventFilter(self, obj, ev):
+            if isinstance(ev, QMouseEvent):
+                self.fixPosition()
+            return False
+
+        def enterEvent(self, ev):
+            self.fixPosition()
+            QWidget.enterEvent(self, ev)
+
+elif config_UseQt5 and not LINUX:
+    from PyQt5.QtGui import QWindow
+
+    class QEmbedWidget(object):
+        def __init__(self, winId):
+            self.fWindow = QWindow.fromWinId(winId)
+            self.fWidget = QWidget.createWindowContainer(self.fWindow)
+            self.fWidget.setAttribute(Qt.WA_LayoutUsesWidgetRect)
+
+            # TODO: show/hide/close events
+
+        def getWidget(self):
+            return self.fWidget
+
+        def finalSetup(self, gui, winId):
+            self.fWidget.show()
+
+elif not config_UseQt5 and LINUX:
     from PyQt4.QtGui import QX11EmbedWidget
 
     class QEmbedWidget(QX11EmbedWidget):
-        def __init__(self):
+        def __init__(self, winId):
             QX11EmbedWidget.__init__(self)
 
+        def getWidget(self):
+            return self
+
         def finalSetup(self, gui, winId):
             self.embedInto(winId)
             self.show()
 
 else:
     class QEmbedWidget(object):
-        def __init__(self, winId, width, height):
+        def __init__(self, winId):
             print("Cannot use embed UI with this configuration")
             raise Exception
 
@@ -455,18 +486,19 @@ else:
 
 class CarlaEmbedW(QEmbedWidget):
     def __init__(self, host, winId):
-        QEmbedWidget.__init__(self)
-        self.setFixedSize(740, 512)
+        QEmbedWidget.__init__(self, winId)
 
         self.host = host
         self.fWinId = winId
+        self.fWidget = self.getWidget()
+        self.fWidget.setFixedSize(740, 512)
 
-        self.fLayout = QVBoxLayout(self)
+        self.fLayout = QVBoxLayout(self.fWidget)
         self.fLayout.setContentsMargins(0, 0, 0, 0)
         self.fLayout.setSpacing(0)
-        self.setLayout(self.fLayout)
+        self.fWidget.setLayout(self.fLayout)
 
-        self.gui = CarlaMiniW(host, self)
+        self.gui = CarlaMiniW(host, self.fWidget)
         self.gui.hide()
 
         self.gui.ui.act_file_quit.setEnabled(False)
@@ -493,7 +525,7 @@ class CarlaEmbedW(QEmbedWidget):
         self.addWidget(self.gui.centralWidget())
         self.finalSetup(self.gui, winId)
 
-        self.gui.send(["ready", int(self.winId())])
+        self.gui.send(["ready", int(self.fWidget.winId())])
 
     def addShortcutActions(self, actions):
         for action in actions:
@@ -501,11 +533,11 @@ class CarlaEmbedW(QEmbedWidget):
                 self.fShortcutActions.append(action)
 
     def addWidget(self, widget):
-        widget.setParent(self)
+        widget.setParent(self.fWidget)
         self.fLayout.addWidget(widget)
 
     def addLine(self):
-        line = QFrame(self)
+        line = QFrame(self.fWidget)
         line.setFrameShadow(QFrame.Sunken)
         line.setFrameShape(QFrame.HLine)
         line.setLineWidth(0)