morpheasExample.py

import bpy
import bgl
import blf
from morpheas import *

# this class is defining the action performed when the button is clicked
clase AButtonAction:
   def onLeftClick(morph):
      print("the button has been clicked")
      morph.texture = "buttonClickedIcon"

def draw_callback_px(self, context):
   #draw the morphs
   self.world.draw()


class ModalDrawOperator(bpy.types.Operator):
    """Draw a line with the mouse"""
    bl_idname = "view3d.modal_operator"
    bl_label = "Simple Modal View3D Operator"
    
    def __init__(self):
         self.world = None
         # create button 
         self.abutton = ButtonMorph(texture="buttonIcon",onLeftClickAction = AButtonAction)
         self.world.addMorph(self.abutton)

    def modal(self, context, event):
         context.area.tag_redraw()
         self.world.onEvent(event)
         if self.world.consumedEvent:
            return {'RUNNING_MODAL'}
         else:
            return {'PASS THROUGH'}

    def invoke(self, context, event):
        # create the world
        self.world = World()
      
        if context.area.type == 'VIEW_3D':
            # the arguments we pass the the callback
            args = (self, context)
            # Add the region OpenGL drawing callback
            # draw in view space with 'POST_VIEW' and 'PRE_VIEW'
            self._handle = bpy.types.SpaceView3D.draw_handler_add(draw_callback_px, args, 'WINDOW', 'POST_PIXEL')

            self.mouse_path = []

            context.window_manager.modal_handler_add(self)
            return {'RUNNING_MODAL'}
        else:
            self.report({'WARNING'}, "View3D not found, cannot run operator")
            return {'CANCELLED'}


def register():
    bpy.utils.register_class(ModalDrawOperator)


def unregister():
    bpy.utils.unregister_class(ModalDrawOperator)

if __name__ == "__main__":
    register()