Merge pull request #1227 from chaosphere2112/open_interact

Allow open/interact without plotting anything

Author: doutriaux1

Packages/vcs/Lib/VTKPlots.py

@@ -85,6 +85,7 @@ def interact(self,*args,**kargs):
           warnings.warn("Cannot start interaction. Blank plot?")
           return
       warnings.warn("Press 'Q' to exit interactive mode and continue script execution")
+      self.showGUI()
       interactor.Start()
 
   def endEvent(self,obj,event):
@@ -296,9 +297,11 @@ def createRenWin(self,*args,**kargs):
 
     if self.renderer == None:
       self.renderer = self.createRenderer()
-      if self.bg is False:
+      if self.bg != True:
           self.createDefaultInteractor(self.renderer)
       self.renWin.AddRenderer(self.renderer)
+    if "open" in kargs and kargs["open"]:
+      self.renWin.Render()
 
   def createRenderer(self, *args, **kargs):
       # For now always use the canvas background
@@ -1452,7 +1455,7 @@ def hideGUI(self):
 
     if plot:
         plot.hideWidgets()
-    elif self.bg is False:
+    elif self.bg != True:
       from vtk_ui.manager import get_manager, manager_exists
       if manager_exists(self.renWin.GetInteractor()):
           manager = get_manager(self.renWin.GetInteractor())
@@ -1463,7 +1466,7 @@ def showGUI(self, render=True):
 
     if plot:
         plot.showWidgets()
-    elif self.bg is False:
+    elif self.bg != True:
       from vtk_ui.manager import get_manager, manager_exists
       if manager_exists(self.renWin.GetInteractor()):
           manager = get_manager(self.renWin.GetInteractor())

Packages/vcs/Lib/configurator.py

@@ -339,7 +339,7 @@ def click(self, object, event):
         self.clicking = (self.interactor.GetEventPosition(), datetime.datetime.now())
 
     def show(self):
-        if len(self.displays) == 0:
+        if self.interactor is None:
             return
         self.place()
         self.toolbar.show()

testing/vcs/test_vcs_interact_no_plot.py

@@ -1,6 +1,21 @@
-
 import vcs
-x=vcs.init()
+import sys
+
+x = vcs.init()
 x.drawlogooff()
 x.open()
+
+inter = x.backend.renWin.GetInteractor()
+
+
+def end_interact(obj, event):
+    print "Interaction began"
+    inter.TerminateApp()
+    sys.exit(0)
+
+inter.AddObserver("StartEvent", end_interact)
 x.interact()
+
+# Should not reach this point
+print "Did not start interact."
+sys.exit(1)