From 92e9cc8bbd8900413c1349139e21ef12a411f684 Mon Sep 17 00:00:00 2001
From: Sai Vineet <saivineet89@gmail.com>
Date: Tue, 19 Nov 2013 14:27:56 +0000
Subject: 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
---
(limited to 'activity.py')

diff --git a/activity.py b/activity.py
index d7a3d76..9994dea 100644
--- a/activity.py
+++ b/activity.py
@@ -32,6 +32,7 @@ from sugar.activity.widgets import ActivityToolbarButton
 from sugar.activity.widgets import StopButton
 from sugar.graphics.radiotoolbutton import RadioToolButton
 from sugar.graphics.toolbutton import ToolButton
+from sugar.graphics.alert import ConfirmationAlert
 from sugar.graphics.toolbarbox import ToolbarBox
 from sugar.graphics.toolbarbox import ToolbarButton
 from sugar.graphics.style import GRID_CELL_SIZE
@@ -120,6 +121,12 @@ class PhysicsActivity(activity.Activity):
         self._insert_stop_play_button(toolbar_box.toolbar)
 
         separator = gtk.SeparatorToolItem()
+        toolbar_box.toolbar.insert(separator, -1)
+        separator.show()
+
+        self._insert_clear_all_button(toolbar_box.toolbar)
+
+        separator = gtk.SeparatorToolItem()
         separator.props.draw = False
         separator.set_size_request(0, -1)
         separator.set_expand(True)
@@ -149,6 +156,14 @@ class PhysicsActivity(activity.Activity):
         toolbar.insert(self.stop_play, -1)
         self.stop_play.show()
 
+    def _insert_clear_all_button(self, toolbar):
+        self.clear_all = ToolButton('clear_all')
+        self.clear_all.set_tooltip(_("Erase All"))
+        self.clear_all.set_accelerator(_('<ctrl>a'))
+        self.clear_all.connect('clicked', self.clear_all_cb)
+        toolbar.insert(self.clear_all, -1)
+        self.clear_all.show()
+
     def _insert_create_tools(self, create_toolbar):
 
         def _insert_item(toolbar, item, pos=-1):
@@ -186,6 +201,21 @@ class PhysicsActivity(activity.Activity):
             self.stop_play.set_icon('media-playback-start')
             self.stop_play.set_tooltip(_("Start"))
 
+    def clear_all_cb(self, button):
+        clear_all_alert = ConfirmationAlert()
+        clear_all_alert.props.title=_('Are You Sure?')
+        clear_all_alert.props.msg = _('All you work will be discarded. This cannot be undone!')
+        clear_all_alert.connect('response', self.clear_all_alert_cb)
+        self.add_alert(clear_all_alert)
+
+    def clear_all_alert_cb(self, alert, response_id):
+        self.remove_alert(alert)
+        if response_id is gtk.RESPONSE_OK:
+            pygame.event.post(pygame.event.Event(pygame.USEREVENT,
+                                             action="clear_all"))
+        else:
+            pass
+
     def radioClicked(self, button):
         pygame.event.post(pygame.event.Event(pygame.USEREVENT,
                                              action=self.radioList[button]))
--
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