WorldLoader now has a startLoader function with a minimum duration.

The minimum duration tells how long to load chunks immediately before starting the async loader.

src/mcedit2/editortools/brush/__init__.py

@@ -220,7 +220,7 @@ class BrushTool(EditorTool):
         self.cursorNode.addChild(self.cursorBoxNode)
 
         self.brushLoader = WorldLoader(self.cursorWorldScene)
-        self.brushLoader.timer.start()
+        self.brushLoader.startLoader()
 
 
 # xxx button palette?

src/mcedit2/editortools/generate.py

@@ -412,7 +412,7 @@ class GenerateTool(EditorTool):
             if dim.chunkCount() <= self.instantDisplayChunks:
                 exhaust(self.loader.work())
             else:
-                self.loader.timer.start()
+                self.loader.startLoader()
         else:
             self.clearSchematic()
 

src/mcedit2/editortools/move.py

@@ -161,7 +161,7 @@ class PendingImportNode(Node, QtCore.QObject):
 
         self.loader = WorldLoader(self.worldScene,
                                   list(pendingImport.selection.chunkPositions()))
-        self.loader.timer.start()
+        self.loader.startLoader()
 
     def handleBoundsChanged(self, bounds):
         self.pos = bounds.origin
@@ -202,7 +202,7 @@ class PendingImportNode(Node, QtCore.QObject):
             cPos = list(self.pendingImport.transformedDim.chunkPositions())
             self.loader = WorldLoader(self.transformedWorldScene,
                                       cPos)
-            self.loader.timer.start()
+            self.loader.startLoader()
 
         else:
             self.rotateNode.visible = True

src/mcedit2/util/worldloader.py

@@ -6,6 +6,7 @@ import contextlib
 import logging
 import weakref
 from PySide import QtCore
+import time
 from mcedit2.util import profiler
 
 log = logging.getLogger(__name__)
@@ -56,6 +57,12 @@ class WorldLoader(object):
         self.chunkPositions = chunkPositions
         self.chunkIter = self.work()
 
+    def startLoader(self, duration=0.12):
+        self.timer.start()
+        start = time.time()
+        while time.time() < start + duration:
+            self.loadChunk()
+
     def loadChunk(self):
         try:
             self.chunkIter.next()

src/mcedit2/worldview/schematic_worldview.py

@@ -85,8 +85,8 @@ def displaySchematic(schematic):
     _swv_view = SchematicWorldView(dim, textureAtlas)
 
     loader = WorldLoader(_swv_view.worldScene)
-    loader.timer.start()
     loader.timer.timeout.connect(_swv_view.update)
+    loader.startLoader()
 
     centerWidgetInScreen(_swv_view, resize=0.75)