From a4c7f039f0b2785bcef54b16fb0afb26064c2b5a Mon Sep 17 00:00:00 2001
From: Ayush Goyal <ayush@seeta.in>
Date: Thu, 28 Oct 2010 20:07:37 +0000
Subject: Fixed aspect ratio mode for Shape tools (OLPC#3705)

Added fixed aspect ratio mode for line,ellipse and rectangle tool using Shift
key as mask or using a keep aspect ratio checkbox from palette.This allows
drawing of straight lines & 45 degree lines from line tool,circle from
ellipse tool and square from rectangle tool

Signed-off-by: Ayush Goyal <ayush@seeta.in>
---
(limited to 'toolbox.py')

diff --git a/toolbox.py b/toolbox.py
index 3c8ab92..ebed30f 100644
--- a/toolbox.py
+++ b/toolbox.py
@@ -855,6 +855,11 @@ class ShapesToolbar(gtk.Toolbar):
         tool['fill'] = checkbutton.get_active()
         self.set_tool(tool=tool)
 
+    def _on_keep_aspect_checkbutton_toggled(self, checkbutton, tool):
+        self._activity.area.keep_shape_ratio[tool['name']] = \
+                checkbutton.get_active()
+        self.set_tool(tool=tool)
+
     def _configure_palette_shape_ellipse(self):
         logging.debug('Creating palette to shape ellipse')
         self._create_simple_palette(self._shape_ellipse, self._SHAPE_ELLIPSE)
@@ -991,6 +996,14 @@ class ShapesToolbar(gtk.Toolbar):
         size_spinbutton.connect('value-changed',
             self._on_line_size_value_changed, tool)
 
+        if tool['name'] in ['rectangle', 'ellipse', 'line']:
+            keep_aspect_checkbutton = gtk.CheckButton(_('Keep Aspect'))
+            ratio = self._activity.area.keep_shape_ratio[tool['name']]
+            keep_aspect_checkbutton.set_active(ratio)
+            keep_aspect_checkbutton.connect('toggled',
+                self._on_keep_aspect_checkbutton_toggled, tool)
+            palette.content_box.pack_start(keep_aspect_checkbutton)
+
         palette.content_box.show_all()
 
     def _configure_palette_shape_line(self):
--
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