Difference between revisions of "PyCEGUI/Example"

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# constants.py
 
 
"""Constant values.
 
Values currently contained in this file include:
 
    Version information
    Window name(s)
 
"""
 
# Import: std
import sys
 
# Import: psyco
try:
    import psyco
    psyco.full()
except ImportError:
    pass
 
 
# Versioning
MINOR_VERSION = '01'
MAJOR_VERSION = '0'
FULL_VERSION = '.'.join([MAJOR_VERSION, MINOR_VERSION])
 
# Name: Root window
NAME_ROOT_WINDOW = 'Demo: %s' % FULL_VERSION

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# errors.py
 
"""Errors.
 
Currently defined errors include:
 
    InitializationError
 
"""
 
# Import: std
import sys
 
# Import: psyco
try:
    import psyco
    psyco.full()
except ImportError:
    pass
 
 
# InitializationError
class InitializationError(Exception):
    def __init__(self, msg):
        self.msg = msg
    def __str__(self):
        return ('InitializationError: %s' % self.msg)

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# video.py
 
 
"""Video functionality.
 
This class brings together PyCEGUI and OpenGL into a comfortable interface.
 
"""
 
# Import: std
import sys
 
# Import: psyco
try:
    import psyco
    psyco.full()
except ImportError:
    pass
 
# Import: OpenGL
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
 
# Import: PyCEGUI
import PyCEGUI
from PyCEGUIOpenGLRenderer import OpenGLRenderer as Renderer
 
# Import: User
from constants import *
from errors import InitializationError
 
 
# Video
class Video(object):
 
    # Initialize: OpenGL
    def initializeOpenGL(self):
        glutInit()
        glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA)
        glutInitWindowSize(1024, 768)
        glutInitWindowPosition(-1, -1)
        glutCreateWindow(NAME_ROOT_WINDOW)
        glutSetCursor(GLUT_CURSOR_NONE)
 
        # Handlers
        glutDisplayFunc(self.handlerDisplay)
        glutReshapeFunc(self.handlerReshape)
        return
 
    # Initialize: PyCEGUI
    def initializePyCEGUI(self):
        self.renderer = Renderer.bootstrapSystem()
        return
 
    # Initialize
    def Initialize(self):
        try:
            self.initializeOpenGL()
            self.initializePyCEGUI()
        except Exception, msg:
            raise InitializationError(msg)
        return
 
    # Shutdown
    # - For implicit use, use the Python special method `__del__`.
    def Shutdown(self):
        self.renderer.destroySystem()
        return
 
    # Handler: Display
    # - This is called to refresh the screen.
    # - See PyOpenGL documentation.
    def handlerDisplay(self):
        thisTime = glutGet(GLUT_ELAPSED_TIME)
        elapsed = (thisTime - self.lastFrameTime) / 1000.0
        self.lastFrameTime = thisTime
        self.updateFPS = self.updateFPS - elapsed
        PyCEGUI.System.getSingleton().injectTimePulse(elapsed)
 
        # Render this frame
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
        PyCEGUI.System.getSingleton().renderGUI()
        glutPostRedisplay()
        glutSwapBuffers()
        return
 
    # Handler: Reshape
    # - This is called when the window is resized and/or switches to fullscreen.
    # - See PyOpenGL documentation.
    def handlerReshape(self, width, height):
        glViewport(0, 0, width, height)
        glMatrixMode(GL_PROJECTION)
        glLoadIdentity()
        gluPerspective(60.0, width / height, 1.0, 50.0)
        glMatrixMode(GL_MODELVIEW)
        PyCEGUI.System.getSingleton().notifyDisplaySizeChanged(PyCEGUI.Size(width, height))
        return
 
    # Main loop
    # - Set the initial values.
    # - This never returns; once this gets called, the application is driven entirely by events.
    def EnterMainLoop(self):
        self.lastFrameTime = glutGet(GLUT_ELAPSED_TIME)
        self.updateFPS = 0
        glutMainLoop()
        return

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# input.py
 
 
"""Input functionality.
 
This class sets up input processing by creating handlers for GLUT that inject
input into PyCEGUI.
 
"""
 
# Import: std
import sys
 
# Import: psyco
try:
    import psyco
    psyco.full()
except ImportError:
    pass
 
# Import: OpenGL
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
 
# Import: PyCEGUI
import PyCEGUI
 
# Import: User
from constants import *
from errors import InitializationError
 
 
# Input
class Input(object):
 
    # Initialize: Handlers
    def initializeHandlers(self):
        glutKeyboardFunc(self.handlerKeyDown)
        glutMouseFunc(self.handlerMouseButton)
 
        # The difference between these two is that the passive one is called when there is
        # mouse motion while no buttons are pressed, and the other is called when there
        # is mouse motion while buttons are pressed. See PyOpenGL documentation.
        glutMotionFunc(self.handlerMouseMotion)
        glutPassiveMotionFunc(self.handlerMouseMotion)
        return
 
    # Initialize
    def Initialize(self):
        try:
            self.initializeHandlers()
        except Exception, msg:
            raise InitializationError(msg)
        return
 
    # Handler: Key Down
    # - `ord` is a built-in Python function.
    def handlerKeyDown(self, key, x, y):
        PyCEGUI.System.getSingleton().injectChar(ord(key))
        return
 
    # Handler: Mouse Button
    def handlerMouseButton(self, button, state, x, y):
        if button == GLUT_LEFT_BUTTON:
            if state == GLUT_UP:
                PyCEGUI.System.getSingleton().injectMouseButtonUp(PyCEGUI.LeftButton)
            else:
                PyCEGUI.System.getSingleton().injectMouseButtonDown(PyCEGUI.LeftButton)
 
        # A thought is to turn this into an `else` clause; however, this implies that any
        # button besides the left is interpreted as the right button - this seems undesirable
        # for any mouse with more than two buttons.
        elif button == GLUT_RIGHT_BUTTON:
            if state == GLUT_UP:
                PyCEGUI.System.getSingleton().injectMouseButtonUp(PyCEGUI.RightButton)
            else:
                PyCEGUI.System.getSingleton().injectMouseButtonDown(PyCEGUI.RightButton)
 
        # An `else` clause could also go here to perform some arbitrary action on unhandled
        # mouse input; this is left as an exercise for the reader. Instead, we just implicitly
        # ignore it.
        return
 
    # Handler: Mouse Motion
    # - This might seem arbitrary, but in fact this is required or else the position of the mouse
    # will never be updated inside the window.
    def handlerMouseMotion(self, x, y):
        PyCEGUI.System.getSingleton().injectMousePosition(x, y)
        return

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# gui.py
 
 
"""GUI.
 
This class is the entry point for the GUI; which is to say that it starts the
main menu and the rest is event driven.
 
"""
 
# Import: std
import sys
 
# Import: psyco
try:
    import psyco
    psyco.full()
except ImportError:
    pass
 
# Import: PyCEGUI
import PyCEGUI
 
# Import: User
from errors import InitializationError
import demomenu
 
 
# GUI
class GUI(object):
 
    # Initialize: Resources
    def initializeResources(self):
        rp = PyCEGUI.System.getSingleton().getResourceProvider()
        rp.setResourceGroupDirectory('schemes', './datafiles/schemes')
        rp.setResourceGroupDirectory('imagesets', './datafiles/imagesets')
        rp.setResourceGroupDirectory('fonts', './datafiles/fonts')
        rp.setResourceGroupDirectory('layouts', './datafiles/layouts')
        rp.setResourceGroupDirectory('looknfeels', './datafiles/looknfeel')
        rp.setResourceGroupDirectory('schemas', './datafiles/xml_schemas')
        PyCEGUI.Imageset.setDefaultResourceGroup('imagesets')
        PyCEGUI.Font.setDefaultResourceGroup('fonts')
        PyCEGUI.Scheme.setDefaultResourceGroup('schemes')
        PyCEGUI.WidgetLookManager.setDefaultResourceGroup('looknfeels')
        PyCEGUI.WindowManager.setDefaultResourceGroup('layouts')
        parser = PyCEGUI.System.getSingleton().getXMLParser()
        if parser.isPropertyPresent('SchemaDefaultResourceGroup'):
            parser.setProperty('SchemaDefaultResourceGroup', 'schemas')
        return
 
    # Initialize: Defaults
    def initializeDefaults(self):
        sm = PyCEGUI.SchemeManager.getSingleton()
        sm.create('VanillaSkin.scheme')
        sm.create('TaharezLook.scheme')
        PyCEGUI.System.getSingleton().setDefaultMouseCursor('Vanilla-Images', 'MouseArrow')
        return
 
    # Initialize
    def Initialize(self):
        try:
            self.initializeResources()
            self.initializeDefaults()
 
            # GUISheet
            self.GUISheet = PyCEGUI.WindowManager.getSingleton().createWindow('DefaultWindow', 'Root')
            PyCEGUI.System.getSingleton().setGUISheet(self.GUISheet)
        except Exception, msg:
            raise InitializationError(msg)
        return
 
    # Setup
    # - Important: the instance of `demomenu.DemoMenu` has to be bound to this object; if it is
    # a local variable (read: destroyed when it goes out of scope), exceptions will be raised
    # about the `buttonClicked` method not existing. This is a drawback of the type of setup
    # this example uses, and as a consequence of Python being a garbage collected language.
    def Setup(self):
        self.demoMenu = demomenu.DemoMenu()
        self.demoMenu.Initialize()
        self.demoMenu.Setup()
        return
 
    # Setup: Interface
    def setupInterface(self):
        self.Setup()
        return

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# demomenu.py
 
 
"""DemoMenu.
 
This class represents a demonstration of how to control a menu with PyCEGUI and PyOpenGL.
 
"""
 
# Import: std
import sys
 
# Import: psyco
try:
    import psyco
    psyco.full()
except ImportError:
    pass
 
# Import: PyCEGUI
import PyCEGUI
 
# Import: User
from errors import InitializationError
 
 
# DemoMenu
class DemoMenu(object):
 
    # Initialize
    def Initialize(self):
        self.GUISheet = PyCEGUI.System.getSingleton().getGUISheet()
 
        # Load the layout
        self.menu = PyCEGUI.WindowManager.getSingleton().loadWindowLayout('DemoMenu.layout')
        return
 
    # connectHandlers
    # - Wrapper method to define the subscription/listener relationships.
    # - If there are a lot, it may behoove the coder to encapsulate them in methods, then call those methods here.
    def connectHandlers(self):
        self.menu.getChild('DemoMenu/Button').subscribeEvent(PyCEGUI.PushButton.EventClicked, self, 'buttonClicked')
        return
 
    # Setup
    def Setup(self):
 
        # Connect the handlers
        self.connectHandlers()
 
        # Attach
        self.GUISheet.addChildWindow(self.menu)
        return
 
    # Handler: buttonClicked
    def buttonClicked(self, args):
        print('buttonClicked')
        return

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# demo.py
 
 
"""Demo entry point.
 
A demonstration; mildly comprehensive, but not really.
 
"""
 
# Import: std
import sys, os.path
sys.path.append(os.path.join(os.getcwd(), 'config'))
sys.path.append(os.path.join(os.getcwd(), 'error'))
sys.path.append(os.path.join(os.getcwd(), 'input'))
sys.path.append(os.path.join(os.getcwd(), 'video'))
sys.path.append(os.path.join(os.getcwd(), 'gui'))
 
# Import: psyco
try:
    import psyco
    psyco.full()
except ImportError:
    pass
 
# Import: User
from errors import InitializationError
from input import Input
from video import Video
from gui import GUI
 
 
# Main
def main():
    gfx = Video()
    inp = Input()
    gui = GUI()
 
    # Initialize
    try:
        gfx.Initialize()
        inp.Initialize()
        gui.Initialize()
    except InitializationError as error:
        print(error)
        return 1
 
    # Setup the interface
    gui.setupInterface()
 
    # Main Loop
    gfx.EnterMainLoop()
 
    # Done
    # - We will never actually get here.
    gfx.Shutdown()
    return 0
 
# Guard
if __name__ == '__main__':
    sys.exit(main())

def buttonClicked(self, args):
    editbox = self.menu.getChild('DemoMenu/Edit')
    print(editbox.getText())
    return