[dia] First version of a simple rotation plugin.

[Steffen Macke <sdteffen src gnome org>]

commit 41fe0eb8dcd04e83907c13cb4166d698f77514cf
Author: Steffen Macke <sdteffen sdteffen de>
Date:   Sun May 30 18:53:15 2010 +0200

    First version of a simple rotation plugin.

 plug-ins/python/dia_rotate.py |  105 +++++++++++++++++++++++++++++++++++++++++
 1 files changed, 105 insertions(+), 0 deletions(-)
---
diff --git a/plug-ins/python/dia_rotate.py b/plug-ins/python/dia_rotate.py
new file mode 100644
index 0000000..d6a60dd
--- /dev/null
+++ b/plug-ins/python/dia_rotate.py
@@ -0,0 +1,105 @@
+# PyDia Rotation 
+# Copyright (c) 2003, Hans Breuer <hans breuer org>
+# Copyright (c) 2009  Steffen Macke <sdteffen sdteffen de
+#
+#  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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+import dia, math, string
+
+class CRotateDialog :
+	def __init__(self, d, data) :
+		import pygtk
+		pygtk.require("2.0")
+		import gtk
+		win = gtk.Window()
+		win.connect("delete_event", self.on_delete)
+		win.set_title("Rotation")
+
+		self.diagram = d
+		self.data = data
+		self.win = win
+
+		box1 = gtk.VBox()
+		win.add(box1)
+		box1.show()
+
+		box2 = gtk.VBox(spacing=10)
+		box2.set_border_width(10)
+		box1.pack_start(box2)
+		box2.show()
+
+		self.entry = gtk.Entry()
+		self.entry.set_text("0.0")
+		box2.pack_start(self.entry)
+		self.entry.show()
+
+		separator = gtk.HSeparator()
+		box1.pack_start(separator, expand=0)
+		separator.show()
+
+		box2 = gtk.VBox(spacing=10)
+		box2.set_border_width(10)
+		box1.pack_start(box2, expand=0)
+		box2.show()
+
+		button = gtk.Button("rotate")
+		button.connect("clicked", self.on_rotate)
+		box2.pack_start(button)
+		button.set_flags(gtk.CAN_DEFAULT)
+		button.grab_default()
+		button.show()
+		win.show()
+
+	def on_rotate(self, *args) :
+		s = self.entry.get_text()
+		angle = float(s)
+		if angle >= 0 and angle <= 360 :
+			SimpleRotate (self.data, angle)
+			self.data.update_extents ()
+			self.diagram.flush()
+		else :
+			dia.message(1, "Value out of range!")
+		self.win.destroy ()
+
+	def on_delete (self, *args) :
+		self.win.destroy ()
+
+def SimpleRotate(data, angle) :
+	# Rotation center
+	xm = 0.0
+	ym = 0.0
+
+	# Convert to radians
+	angle_rad = 2*math.pi - 2*math.pi*angle/360
+
+	objs = data.get_sorted_selected()
+	if len(objs) == 0 :
+		objs = data.active_layer.objects
+	scaleFailed = {}
+	for o in objs :
+		for h in o.handles:
+			x = math.cos(angle_rad)*(h.pos.x+xm)-math.sin(angle_rad)*(h.pos.y+ym)
+			y = math.sin(angle_rad)*(h.pos.x+xm)+math.cos(angle_rad)*(h.pos.y)
+			o.move_handle(h, (x,y), 0, 0)
+					
+	data.update_extents ()
+	dia.active_display().add_update_all()
+
+def rotate_cb(data, flags) :
+	dlg = CRotateDialog(dia.active_display().diagram, data)
+
+dia.register_action ("ObjectsSimplerotation", "Simple Rotation",
+		     "/DisplayMenu/Objects/ObjectsExtensionStart", 
+		     rotate_cb)