Added selection_utils module. It contains a modal operator which allows the order in which objects were selected to be stored for use in other operators. The list of object names is stored in selection_utils.selected

1 files changed, 75 insertions, 0 deletions

diff --git a/modules/selection_utils.py b/modules/selection_utils.py
new file mode 100644
index 00000000..002461b7
--- /dev/null
+++ b/modules/selection_utils.py
@@ -0,0 +1,75 @@
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU General Public License
+#  as published by the Free Software Foundation; either version 2
+#  of the License, or (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software Foundation,
+#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+import bpy
+
+selected = []
+
+
+class SelectionOrder(bpy.types.Operator):
+    '''Store the object names in the order they are selected.
+    Use RETURN key to confirm selection, ESCAPE key to cancel'''
+    bl_idname = "object.select_order"
+    bl_label = "Select with Order"
+    bl_options = {'UNDO'}
+
+    num_selected = 0
+
+    @classmethod
+    def poll(self, context):
+        return bpy.context.mode == 'OBJECT'
+
+    def update(self, context):
+        # Get the currently selected objects
+        sel = context.selected_objects
+        num = len(sel)
+
+        if num == 0:
+            # Reset the list
+            selected[:] = []
+        elif num > self.num_selected:
+            # Get all the newly selected objects and add
+            new = [ob.name for ob in sel if ob.name not in selected]
+            selected.extend(new)
+        elif num < self.num_selected:
+            # Get the selected objects and remove from list
+            curnames = {ob.name for ob in sel}
+            selected[:] = [name for name in selected if name in curnames]
+
+        # Set the number of currently select objects
+        self.num_selected = len(selected)
+
+    def modal(self, context, event):
+        if event.type == 'RET':
+            # If return is pressed, finish the operator
+            return {'FINISHED'}
+        elif event.type == 'ESC':
+            # If escape is pressed, cancel the operator
+            return {'CANCELLED'}
+
+        # Update selection if we need to
+        self.update(context)
+        return {'PASS_THROUGH'}
+
+    def invoke(self, context, event):
+        context.window_manager.modal_handler_add(self)
+        self.update(context)
+        return {'RUNNING_MODAL'}
+
+
+bpy.utils.register_module(__name__)
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