showbase: allow DirectGui elements to be created before ShowBase

This is done by precreating aspect2d inside ShowBaseGlobal.

direct/src/gui/DirectGuiBase.py

@@ -80,7 +80,8 @@ __all__ = ['DirectGuiBase', 'DirectGuiWidget']
 
 
 from panda3d.core import *
-from panda3d.direct import get_config_showbase
+from direct.showbase import ShowBaseGlobal
+from direct.showbase.ShowBase import ShowBase
 from . import DirectGuiGlobals as DGG
 from .OnscreenText import *
 from .OnscreenGeom import *
@@ -633,7 +634,7 @@ class DirectGuiBase(DirectObject.DirectObject):
         """
         # Need to tack on gui item specific id
         gEvent = event + self.guiId
-        if get_config_showbase().GetBool('debug-directgui-msgs', False):
+        if ShowBase.config.GetBool('debug-directgui-msgs', False):
             from direct.showbase.PythonUtil import StackTrace
             print(gEvent)
             print(StackTrace())
@@ -662,7 +663,7 @@ 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 = get_config_showbase().GetBool('direct-gui-edit', 0)
+    guiEdit = ShowBase.config.GetBool('direct-gui-edit', False)
     if guiEdit:
         inactiveInitState = DGG.NORMAL
     else:
@@ -723,21 +724,24 @@ class DirectGuiWidget(DirectGuiBase, NodePath):
         if self['guiId']:
             self.guiItem.setId(self['guiId'])
         self.guiId = self.guiItem.getId()
-        if __dev__:
+
+        if ShowBaseGlobal.__dev__:
             guiObjectCollector.addLevel(1)
             guiObjectCollector.flushLevel()
             # track gui items by guiId for tracking down leaks
-            if hasattr(base, 'guiItems'):
-                if self.guiId in base.guiItems:
-                    base.notify.warning('duplicate guiId: %s (%s stomping %s)' %
-                                        (self.guiId, self,
-                                         base.guiItems[self.guiId]))
-                base.guiItems[self.guiId] = self
-                if hasattr(base, 'printGuiCreates'):
-                    printStack()
+            if ShowBase.config.GetBool('track-gui-items', True):
+                if not hasattr(ShowBase, 'guiItems'):
+                    ShowBase.guiItems = {}
+                if self.guiId in ShowBase.guiItems:
+                    ShowBase.notify.warning('duplicate guiId: %s (%s stomping %s)' %
+                                            (self.guiId, self,
+                                             ShowBase.guiItems[self.guiId]))
+                ShowBase.guiItems[self.guiId] = self
+
         # Attach button to parent and make that self
-        if (parent == None):
-            parent = aspect2d
+        if parent is None:
+            parent = ShowBaseGlobal.aspect2d
+
         self.assign(parent.attachNewNode(self.guiItem, self['sortOrder']))
         # Update pose to initial values
         if self['pos']:
@@ -1024,17 +1028,12 @@ class DirectGuiWidget(DirectGuiBase, NodePath):
 
     def destroy(self):
         if hasattr(self, "frameStyle"):
-            if __dev__:
+            if ShowBaseGlobal.__dev__:
                 guiObjectCollector.subLevel(1)
                 guiObjectCollector.flushLevel()
-                if hasattr(base, 'guiItems'):
-                    if self.guiId in base.guiItems:
-                        del base.guiItems[self.guiId]
-                    else:
-                        base.notify.warning(
-                            'DirectGuiWidget.destroy(): '
-                            'gui item %s not in base.guiItems' %
-                            self.guiId)
+                if hasattr(ShowBase, 'guiItems'):
+                    ShowBase.guiItems.pop(self.guiId, None)
+
             # Destroy children
             for child in self.getChildren():
                 childGui = self.guiDict.get(child.getName())

direct/src/showbase/ShowBase.py

@@ -400,7 +400,8 @@ class ShowBase(DirectObject.DirectObject):
         if self.__dev__ or self.config.GetBool('want-e3-hacks', False):
             if self.config.GetBool('track-gui-items', True):
                 # dict of guiId to gui item, for tracking down leaks
-                self.guiItems = {}
+                if not hasattr(ShowBase, 'guiItems'):
+                    ShowBase.guiItems = {}
 
         # optionally restore the default gui sounds from 1.7.2 and earlier
         if ConfigVariableBool('orig-gui-sounds', False).getValue():
@@ -520,6 +521,8 @@ class ShowBase(DirectObject.DirectObject):
             if ShowBaseGlobal:
                 del ShowBaseGlobal.base
 
+        self.aspect2d.node().removeAllChildren()
+
         # [gjeon] restore sticky key settings
         if self.config.GetBool('disable-sticky-keys', 0):
             allowAccessibilityShortcutKeys(True)
@@ -1102,13 +1105,18 @@ class ShowBase(DirectObject.DirectObject):
         self.render2d.setMaterialOff(1)
         self.render2d.setTwoSided(1)
 
+        # We've already created aspect2d in ShowBaseGlobal, for the
+        # benefit of creating DirectGui elements before ShowBase.
+        from . import ShowBaseGlobal
+
         ## The normal 2-d DisplayRegion has an aspect ratio that
         ## matches the window, but its coordinate system is square.
         ## This means anything we parent to render2d gets stretched.
         ## For things where that makes a difference, we set up
         ## aspect2d, which scales things back to the right aspect
         ## ratio along the X axis (Z is still from -1 to 1)
-        self.aspect2d = self.render2d.attachNewNode(PGTop("aspect2d"))
+        self.aspect2d = ShowBaseGlobal.aspect2d
+        self.aspect2d.reparentTo(self.render2d)
 
         aspectRatio = self.getAspectRatio()
         self.aspect2d.setScale(1.0 / aspectRatio, 1.0, 1.0)

direct/src/showbase/ShowBaseGlobal.py

@@ -11,6 +11,7 @@ from .ShowBase import ShowBase, WindowControls
 from direct.directnotify.DirectNotifyGlobal import directNotify, giveNotify
 from panda3d.core import VirtualFileSystem, Notify, ClockObject, PandaSystem
 from panda3d.core import ConfigPageManager, ConfigVariableManager
+from panda3d.core import NodePath, PGTop
 from panda3d.direct import get_config_showbase
 
 config = get_config_showbase()
@@ -23,6 +24,9 @@ cpMgr = ConfigPageManager.getGlobalPtr()
 cvMgr = ConfigVariableManager.getGlobalPtr()
 pandaSystem = PandaSystem.getGlobalPtr()
 
+# This is defined here so GUI elements can be instantiated before ShowBase.
+aspect2d = NodePath(PGTop("aspect2d"))
+
 # Set direct notify categories now that we have config
 directNotify.setDconfigLevels()