Show current touches as circle and crosshair

2 files changed, 19 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index 849ddff..e2e795a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
+*.pyo
 dist/
diff --git a/activity.py b/activity.py
index b09d20f..8e4fa8f 100644
--- a/activity.py
+++ b/activity.py
@@ -25,6 +25,7 @@
 from gi.repository import Gtk
 from gi.repository import Gdk
 from random import random
+from math import pi as M_PI
 
 from sugar3.activity import activity
 from sugar3.graphics.toolbarbox import ToolbarBox
@@ -107,10 +108,26 @@ class TouchArea(Gtk.DrawingArea):
             self.queue_draw()
 
     def __draw_cb(self, widget, ctx):
-        ctx.set_line_width(5)
+        alloc = self.get_allocation()
         for seq in self.points:
+            # draw crosshair at last point
+            ctx.set_line_width(1)
+            ctx.set_source_rgb(0.5, 0.5, 0.5)
+            p = self.points[seq][-1]
+            ctx.move_to(p[0], 0)
+            ctx.line_to(p[0], alloc.height)
+            ctx.move_to(0, p[1])
+            ctx.line_to(alloc.width, p[1])
+            ctx.stroke()
+            # use finger's color
             (r, g, b) = self.colors[seq]
             ctx.set_source_rgb(r, g, b)
+            # draw circle at last point
+            ctx.set_line_width(10)
+            ctx.arc(p[0], p[1], 30, 0, 2 * M_PI)
+            ctx.stroke()
+            # draw trail from first to last point
+            ctx.set_line_width(5)
             p = self.points[seq][0]
             ctx.move_to(p[0], p[1])
             for p in self.points[seq]: