automatically scale simulation window

The simulation window is scaled to fill the available space on the screen.  In
the Params dialog, the simulation window sits to the right of the Params window
and fills the remaining space.

embroider_params.py

@@ -400,8 +400,19 @@ class SettingsFrame(wx.Frame):
             simulator_pos = my_rect.GetTopRight()
             simulator_pos.x += 5
 
+            screen_rect = wx.Display(0).ClientArea
+            max_width = screen_rect.GetWidth() - my_rect.GetWidth()
+            max_height = screen_rect.GetHeight()
+
             try:
-                self.simulate_window = EmbroiderySimulator(None, -1, "Embroidery Simulator", simulator_pos, size=(300, 300), patches=patches, on_close=self.simulate_window_closed, target_duration=5)
+                self.simulate_window = EmbroiderySimulator(None, -1, "Embroidery Simulator",
+                                                           simulator_pos,
+                                                           size=(300, 300),
+                                                           patches=patches,
+                                                           on_close=self.simulate_window_closed,
+                                                           target_duration=5,
+                                                           max_width=max_width,
+                                                           max_height=max_height)
             except:
                 error = traceback.format_exc()
 

embroider_simulate.py

@@ -16,7 +16,11 @@ class EmbroiderySimulator(wx.Frame):
         self.frame_period = kwargs.pop('frame_period', 80)
         self.stitches_per_frame = kwargs.pop('stitches_per_frame', 1)
         self.target_duration = kwargs.pop('target_duration', None)
-        self.scale = 3
+
+        screen_rect = wx.Display(0).ClientArea
+        self.max_width = kwargs.pop('max_width', screen_rect.GetWidth())
+        self.max_height = kwargs.pop('max_height', screen_rect.GetHeight())
+        self.scale = 1
 
         wx.Frame.__init__(self, *args, **kwargs)
 
@@ -56,7 +60,7 @@ class EmbroiderySimulator(wx.Frame):
             return
 
         self.trim_margins()
-        self.width, self.height = self.get_dimensions()
+        self.calculate_dimensions()
 
     def adjust_speed(self, duration):
         self.frame_period = 1000 * float(duration) / len(self.segments)
@@ -218,7 +222,7 @@ class EmbroiderySimulator(wx.Frame):
 
         self.segments = new_segments
 
-    def get_dimensions(self):
+    def calculate_dimensions(self):
         width = 0
         height = 0
 
@@ -226,7 +230,12 @@ class EmbroiderySimulator(wx.Frame):
             width = max(width, x)
             height = max(height, y)
 
-        return width, height
+        self.width = width
+        self.height = height
+        self.scale = min(float(self.max_width) / width, float(self.max_height) / height)
+
+        # make room for decorations and a bit of a margin
+        self.scale *= 0.95
 
     def go(self):
         self.clear()