Add a Clear/Erase All tool

Problem: It is problematic to remove all bodies in the canvas, one by one,
to get a clear screen. A clear all tool is certainly needed.

Solution: Implement a Clear All tool, which also asks for confirmation before
destroying everything.

Fixes #1615

1 files changed, 8 insertions, 0 deletions

diff --git a/tools.py b/tools.py
index 358e1fe..62aba05 100644
--- a/tools.py
+++ b/tools.py
@@ -49,6 +49,14 @@ class Tool(object):
                     # Stop/start simulation
                     toggle = self.game.world.run_physics
                     self.game.world.run_physics = not toggle
+                elif event.action == "clear_all":
+                    if len(self.game.world.world.GetBodyList()) > 1:
+                        # Get bodies and destroy them too
+                        for body in self.game.world.world.GetBodyList():
+                            self.game.world.world.DestroyBody(body)
+
+                        # Add ground, because we destroyed it before
+                        self.game.world.add.ground()
                 elif event.action == "focus_in":
                     self.game.in_focus = True
                 elif event.action == "focus_out":