From fa1fef86110c4f9c3c9071d15558933462adef63 Mon Sep 17 00:00:00 2001
From: Bert Freudenberg <bert@freudenbergs.de>
Date: Tue, 06 Nov 2012 16:31:59 +0000
Subject: If there is a less than 100 ms gap between strokes, leave them on screen

If a touch was canceled, color it red (not observed yet)
---
diff --git a/activity.py b/activity.py
index ecc113d..45363eb 100644
--- a/activity.py
+++ b/activity.py
@@ -86,6 +86,7 @@ class TouchArea(Gtk.DrawingArea):
     def __init__(self):
         Gtk.DrawingArea.__init__(self)
         self.fingers = {}
+        self.time = 0
         self.set_events(Gdk.EventMask.TOUCH_MASK)
         self.connect('draw', self.__draw_cb)
         self.connect('event', self.__event_cb)
@@ -100,11 +101,12 @@ class TouchArea(Gtk.DrawingArea):
             # we make it a string for use as dict key
             seq = str(event.touch.sequence)
             if event.type == Gdk.EventType.TOUCH_BEGIN:
-                for f in self.inactive_fingers():
-                    del self.fingers[f]
+                if event.touch.time - self.time > 100:
+                    self.remove_inactive_fingers()
                 self.fingers[seq] = Finger(event)
             else:
                 self.fingers[seq].update(event)
+            self.time = event.touch.time
             self.queue_draw()
 
     def __draw_cb(self, widget, ctx):
@@ -114,9 +116,11 @@ class TouchArea(Gtk.DrawingArea):
         for f in self.fingers:
             self.fingers[f].draw(ctx, alloc.width, alloc.height)
 
-    def inactive_fingers(self):
-        return [f for f in self.fingers if not self.fingers[f].active]
-
+    def remove_inactive_fingers(self):
+        for f in self.fingers:
+            if self.fingers[f].active:
+                return
+        self.fingers = {}
 
 class Finger:
 
@@ -128,10 +132,11 @@ class Finger:
     def update(self, event):
         if event.type == Gdk.EventType.TOUCH_UPDATE:
             self.trail.append( Point(event.touch.x, event.touch.y) )
-        elif event.type in (
-                Gdk.EventType.TOUCH_CANCEL,
-                Gdk.EventType.TOUCH_END):
+        elif event.type == Gdk.EventType.TOUCH_END:
+            self.active = False
+        elif event.type == Gdk.EventType.TOUCH_CANCEL:
             self.active = False
+            self.color = (1, 0, 0)
 
     def draw(self, ctx, width, height):
         (r, g, b) = self.color
--
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