Dock to emit closed signal when closed. Temporary DockArea windows call close method of all docks when they are closed.

pyqtgraph/dockarea/Dock.py

@@ -7,6 +7,7 @@ from ..python2_3 import asUnicode
 class Dock(QtGui.QWidget, DockDrop):
     
     sigStretchChanged = QtCore.Signal()
+    sigClosed = QtCore.Signal(object)
     
     def __init__(self, name, area=None, size=(10, 10), widget=None, hideTitle=False, autoOrientation=True, closable=False):
         QtGui.QWidget.__init__(self)
@@ -224,6 +225,7 @@ class Dock(QtGui.QWidget, DockDrop):
         self.label.setParent(None)
         self._container.apoptose()
         self._container = None
+        self.sigClosed.emit(self)
 
     def __repr__(self):
         return "<Dock %s %s>" % (self.name(), self.stretch())

pyqtgraph/dockarea/DockArea.py

@@ -172,8 +172,7 @@ class DockArea(Container, QtGui.QWidget, DockDrop):
         if self.home is None:
             area = DockArea(temporary=True, home=self)
             self.tempAreas.append(area)
-            win = QtGui.QMainWindow()
-            win.setCentralWidget(area)
+            win = TempAreaWindow(area)
             area.win = win
             win.show()
         else:
@@ -303,6 +302,11 @@ class DockArea(Container, QtGui.QWidget, DockDrop):
                 self.home.removeTempArea(self)
                 #self.close()
 
+    def clear(self):
+        docks = self.findAll()[1]
+        for dock in docks.values():
+            dock.close()
+            
     ## PySide bug: We need to explicitly redefine these methods
     ## or else drag/drop events will not be delivered.
     def dragEnterEvent(self, *args):
@@ -318,4 +322,11 @@ class DockArea(Container, QtGui.QWidget, DockDrop):
         DockDrop.dropEvent(self, *args)
 
 
+class TempAreaWindow(QtGui.QMainWindow):
+    def __init__(self, area, **kwargs):
+        super().__init__(**kwargs)
+        self.setCentralWidget(area)
 
+    def closeEvent(self, *args, **kwargs):
+        self.centralWidget().clear()
+        super().closeEvent(*args, **kwargs)