#!BPY
"""
Name: 'Script Constraint'
Blender: 245
Group: 'ScriptTemplate'
Tooltip: 'Add a new script for custom constraints'
"""

from Blender import Window
import bpy

script_data = \
"""#BPYCONSTRAINT
'''
	PyConstraint template, access this in the "add constraint" scripts submenu.
	Add docstring here
'''

import Blender
from Blender import Draw
from Blender import Mathutils
import math

USE_TARGET = True


'''
 This function is called to evaluate the constraint
	obmatrix:		(Matrix) copy of owner's worldspace matrix
	targetmatrix:	(Matrix) copy of target's worldspace matrix (where applicable)
	idprop:			(IDProperties) wrapped data referring to this 
					constraint instance's idproperties
'''
def doConstraint(obmatrix, targetmatrix, idprop):
	# Separate out the tranformation components for easy access.
	obloc = obmatrix.translationPart()	# Translation
	obrot = obmatrix.toEuler()			# Rotation
	obsca = obmatrix.scalePart()		# Scale

	# Define user-settable parameters.\
	# Must also be defined in getSettings().
	if not idprop.has_key('user_toggle'): idprop['user_toggle'] = 1
	if not idprop.has_key('user_slider'): idprop['user_slider'] = 1.0
	
	
	# Do stuff here, changing obloc, obrot, and obsca.

	
	# Convert back into a matrix for loc, scale, rotation,
	mtxloc = Mathutils.TranslationMatrix( obloc )
	mtxrot = obrot.toMatrix().resize4x4()
	mtxsca = Mathutils.Matrix([obsca[0],0,0,0], [0,obsca[1],0,0], [0,0,obsca[2],0], [0,0,0,1])
	
	# Recombine the separate elements into a transform matrix.
	outputmatrix = mtxsca * mtxrot * mtxloc

	# Return the new matrix.
	return outputmatrix



'''
 This function manipulates the target matrix prior to sending it to doConstraint()
	target_object:					wrapped data, representing the target object
	subtarget_bone:					wrapped data, representing the subtarget pose-bone (where applicable)
	target_matrix:					(Matrix) the transformation matrix of the target
	id_properties_of_constraint:	(IDProperties) wrapped idproperties
'''
def doTarget(target_object, subtarget_bone, target_matrix, id_properties_of_constraint):
	return target_matrix


'''
 This function draws a pupblock that lets the user set
	the values of custom settings the constraint defines.
	This function is called when the user presses the settings button.
	idprop:	(IDProperties) wrapped data referring to this 
			constraint instance's idproperties
'''
def getSettings(idprop):
	# Define user-settable parameters.
	# Must also be defined in getSettings().
	if not idprop.has_key('user_toggle'): idprop['user_toggle'] = 1
	if not idprop.has_key('user_slider'): idprop['user_slider'] = 1.0
	
	# create temporary vars for interface 
	utoggle = Draw.Create(idprop['user_toggle'])
	uslider = Draw.Create(idprop['user_slider'])
	

	# define and draw pupblock
	block = []
	block.append("Buttons: ")
	block.append(("Toggle", utoggle, "This is a toggle button."))
	block.append("More buttons: ")
	block.append(("Slider", uslider, 0.0000001, 1000.0, "This is a number field."))

	retval = Draw.PupBlock("Constraint Template", block)
	
	# update id-property values after user changes settings
	if (retval):
		idprop['user_toggle']= utoggle.val
		idprop['user_slider']= uslider.val

"""

new_text = bpy.data.texts.new('pyconstraint_template.py')
new_text.write(script_data)
bpy.data.texts.active = new_text
Window.RedrawAll()