dgui: allow using various GUI items without instantiating ShowBase

This is done by eliminating dependency on the `hidden` built-in, which can now instead be imported from ShowBaseGlobal.

direct/src/gui/DirectDialog.py

@@ -3,6 +3,7 @@
 __all__ = ['findDialog', 'cleanupDialog', 'DirectDialog', 'OkDialog', 'OkCancelDialog', 'YesNoDialog', 'YesNoCancelDialog', 'RetryCancelDialog']
 
 from panda3d.core import *
+from direct.showbase import ShowBaseGlobal
 from . import DirectGuiGlobals as DGG
 from .DirectFrame import *
 from .DirectButton import *
@@ -207,7 +208,7 @@ class DirectDialog(DirectFrame):
             image = None
         # Get size of text/geom without image (for state 0)
         if image:
-            image.reparentTo(hidden)
+            image.reparentTo(ShowBaseGlobal.hidden)
         bounds = self.stateNodePath[0].getTightBounds()
         if image:
             image.reparentTo(self.stateNodePath[0])

direct/src/gui/DirectEntry.py

@@ -4,6 +4,7 @@ text entered using the keyboard."""
 __all__ = ['DirectEntry']
 
 from panda3d.core import *
+from direct.showbase import ShowBaseGlobal
 from . import DirectGuiGlobals as DGG
 from .DirectFrame import *
 from .OnscreenText import OnscreenText
@@ -94,7 +95,7 @@ class DirectEntry(DirectFrame):
         self.onscreenText = self.createcomponent(
             'text', (), None,
             OnscreenText,
-            (), parent = hidden,
+            (), parent = ShowBaseGlobal.hidden,
             # Pass in empty text to avoid extra work, since its really
             # The PGEntry which will use the TextNode to generate geometry
             text = '',

direct/src/gui/DirectGuiBase.py

@@ -81,7 +81,6 @@ __all__ = ['DirectGuiBase', 'DirectGuiWidget']
 
 from panda3d.core import *
 from direct.showbase import ShowBaseGlobal
-from direct.showbase.ShowBase import ShowBase
 from . import DirectGuiGlobals as DGG
 from .OnscreenText import *
 from .OnscreenGeom import *
@@ -634,7 +633,7 @@ class DirectGuiBase(DirectObject.DirectObject):
         """
         # Need to tack on gui item specific id
         gEvent = event + self.guiId
-        if ShowBase.config.GetBool('debug-directgui-msgs', False):
+        if ShowBaseGlobal.config.GetBool('debug-directgui-msgs', False):
             from direct.showbase.PythonUtil import StackTrace
             print(gEvent)
             print(StackTrace())
@@ -663,7 +662,7 @@ class DirectGuiWidget(DirectGuiBase, NodePath):
     # Determine the default initial state for inactive (or
     # unclickable) components.  If we are in edit mode, these are
     # actually clickable by default.
-    guiEdit = ShowBase.config.GetBool('direct-gui-edit', False)
+    guiEdit = ShowBaseGlobal.config.GetBool('direct-gui-edit', False)
     if guiEdit:
         inactiveInitState = DGG.NORMAL
     else:
@@ -729,7 +728,7 @@ class DirectGuiWidget(DirectGuiBase, NodePath):
             guiObjectCollector.addLevel(1)
             guiObjectCollector.flushLevel()
             # track gui items by guiId for tracking down leaks
-            if ShowBase.config.GetBool('track-gui-items', False):
+            if ShowBaseGlobal.config.GetBool('track-gui-items', False):
                 if not hasattr(ShowBase, 'guiItems'):
                     ShowBase.guiItems = {}
                 if self.guiId in ShowBase.guiItems:

direct/src/gui/DirectScrolledList.py

@@ -3,6 +3,7 @@
 __all__ = ['DirectScrolledListItem', 'DirectScrolledList']
 
 from panda3d.core import *
+from direct.showbase import ShowBaseGlobal
 from . import DirectGuiGlobals as DGG
 from direct.directnotify import DirectNotifyGlobal
 from direct.task.Task import Task
@@ -369,7 +370,7 @@ class DirectScrolledList(DirectFrame):
                 del self.currentSelected
             self["items"].remove(item)
             if type(item) != type(''):
-                item.reparentTo(hidden)
+                item.reparentTo(ShowBaseGlobal.hidden)
             self.refresh()
             return 1
         else:
@@ -387,7 +388,7 @@ class DirectScrolledList(DirectFrame):
                 item.destroy()
             self["items"].remove(item)
             if type(item) != type(''):
-                item.reparentTo(hidden)
+                item.reparentTo(ShowBaseGlobal.hidden)
             self.refresh()
             return 1
         else:
@@ -410,7 +411,7 @@ class DirectScrolledList(DirectFrame):
             self["items"].remove(item)
             if type(item) != type(''):
                 #RAU possible leak here, let's try to do the right thing
-                #item.reparentTo(hidden)
+                #item.reparentTo(ShowBaseGlobal.hidden)
                 item.removeNode()
             retval = 1
 
@@ -435,7 +436,7 @@ class DirectScrolledList(DirectFrame):
             self["items"].remove(item)
             if type(item) != type(''):
                 #RAU possible leak here, let's try to do the right thing
-                #item.reparentTo(hidden)
+                #item.reparentTo(ShowBaseGlobal.hidden)
                 item.removeNode()
             retval = 1
         if (refresh):

direct/src/showbase/ShowBase.py

@@ -207,7 +207,10 @@ class ShowBase(DirectObject.DirectObject):
             # Has the clusterSyncFlag been set via a config variable
             self.clusterSyncFlag = self.config.GetBool('cluster-sync', 0)
 
-        self.hidden = NodePath('hidden')
+        # We've already created aspect2d in ShowBaseGlobal, for the
+        # benefit of creating DirectGui elements before ShowBase.
+        from . import ShowBaseGlobal
+        self.hidden = ShowBaseGlobal.hidden
 
         ## The global graphics engine, ie. GraphicsEngine.getGlobalPtr()
         self.graphicsEngine = GraphicsEngine.getGlobalPtr()

direct/src/showbase/ShowBaseGlobal.py

@@ -25,6 +25,7 @@ pandaSystem = PandaSystem.getGlobalPtr()
 
 # This is defined here so GUI elements can be instantiated before ShowBase.
 aspect2d = NodePath(PGTop("aspect2d"))
+hidden = NodePath("hidden")
 
 # Set direct notify categories now that we have config
 directNotify.setDconfigLevels()

direct/src/showbase/Transitions.py

@@ -5,6 +5,7 @@ a particular color."""
 __all__ = ['Transitions']
 
 from panda3d.core import *
+from direct.showbase import ShowBaseGlobal
 from direct.gui.DirectGui import DirectFrame
 from direct.gui import DirectGuiGlobals as DGG
 from direct.interval.LerpInterval import LerpColorScaleInterval, LerpColorInterval, LerpScaleInterval, LerpPosInterval
@@ -73,7 +74,7 @@ class Transitions:
             # so that it will also obscure mouse events for objects
             # positioned behind it.
             self.fade = DirectFrame(
-                parent = hidden,
+                parent = ShowBaseGlobal.hidden,
                 guiId = 'fade',
                 relief = None,
                 image = self.fadeModel,

direct/src/tkpanels/MopathRecorder.py

@@ -4,6 +4,7 @@ __all__ = ['MopathRecorder']
 
 # Import Tkinter, Pmw, and the dial code from this directory tree.
 from panda3d.core import *
+from direct.showbase import ShowBaseGlobal
 from direct.showbase.DirectObject import DirectObject
 from direct.showbase.TkGlobal import *
 from direct.tkwidgets.AppShell import *
@@ -852,7 +853,7 @@ class MopathRecorder(AppShell, DirectObject):
         if self.getVariable('Style', 'Marker').get():
             self.playbackMarker.reparentTo(self.recorderNodePath)
         else:
-            self.playbackMarker.reparentTo(hidden)
+            self.playbackMarker.reparentTo(ShowBaseGlobal.hidden)
 
     def setNumSegs(self, value):
         self.numSegs = int(value)