Allow open/interact without plotting anything

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
@@ -1435,7 +1438,7 @@ 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())
@@ -1446,7 +1449,7 @@ 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)