jan: thuban/Thuban/UI renderer.py,1.49,1.50

[cvs@intevation.de]

Author: jan

Update of /thubanrepository/thuban/Thuban/UI
In directory doto:/tmp/cvs-serv9105

Modified Files:
	renderer.py 
Log Message:
(ScreenRenderer.draw_selection_incrementally):
Added consideration of the specific size of point symbols.
The property for each point symbol is retrieved and the size applied
for the rendering method.
Added doc-string.


Index: renderer.py
===================================================================
RCS file: /thubanrepository/thuban/Thuban/UI/renderer.py,v
retrieving revision 1.49
retrieving revision 1.50
diff -u -d -r1.49 -r1.50
--- renderer.py	11 Nov 2003 18:16:42 -0000	1.49
+++ renderer.py	17 Nov 2004 22:02:29 -0000	1.50
@@ -1,8 +1,9 @@
-# Copyright (c) 2001, 2002, 2003 by Intevation GmbH
+# Copyright (c) 2001-2004 by Intevation GmbH
 # Authors:
-# Bernhard Herzog <bh at intevation.de>
-# Jonathan Coles <jonathan at intevation.de>
-# Frank Koormann <frank.koormann at intevation.de>
+# Bernhard Herzog <bh at intevation.de> (2001-2003)
+# Jonathan Coles <jonathan at intevation.de> (2003)
+# Frank Koormann <frank.koormann at intevation.de> (2003)
+# Jan-Oliver Wagner <jan at intevation.de> (2003, 2004)
 #
 # This program is free software under the GPL (>=v2)
 # Read the file COPYING coming with Thuban for details.
@@ -129,16 +130,44 @@
         return self.render_map_incrementally()
 
     def draw_selection_incrementally(self, layer, selected_shapes):
+        """Draw the selected shapes in a emphasized way (i.e.
+        with a special pen and brush.
+        The drawing is performed incrementally, that means every
+        n shapes, the user can have interactions with the map.
+        n is currently fixed to 500.
+
+        layer -- the layer where the shapes belong to.
+        selected_shapes -- a list of the shape-ids representing the
+                           selected shapes for the given layer.
+        """
         pen = wxPen(wxBLACK, 3, wxSOLID)
         brush = wxBrush(wxBLACK, wxCROSS_HATCH)
 
         shapetype = layer.ShapeType()
         useraw, func, param = self.low_level_renderer(layer)
         args = (pen, brush)
+
+        # for point shapes we need to find out the properties
+        # to determine the size. Based on table and field,
+        # we can find out the properties for object - see below.
+        if shapetype == SHAPETYPE_POINT:
+            lc = layer.GetClassification()
+            field = layer.GetClassificationColumn()
+            table = layer.ShapeStore().Table()
+
         count = 0
         for index in selected_shapes:
             count += 1
             shape = layer.Shape(index)
+
+            # Get the size of the specific property for this
+            # point
+            if shapetype == SHAPETYPE_POINT:
+                value = table.ReadValue(shape.ShapeID(), field)
+                group = lc.FindGroup(value)
+                size = group.GetProperties().GetSize()
+                args = (pen, brush, size)
+
             if useraw:
                 data = shape.RawData()
             else: