Source code for peng3d.gui

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
#  __init__.py
#  
#  Copyright 2016 notna <notna@apparat.org>
#  
#  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.
#  
#  

__all__ = ["GUIMenu","SubMenu","GUILayer","FakeWidget"]

#from pprint import pprint
#import gc
#import weakref
#import sys
import collections

try:
    import pyglet
    from pyglet.gl import *
except ImportError:
    pass # Headless mode

from ..menu import Menu
from ..layer import Layer,Layer2D
from .widgets import *
from .button import *
from .slider import *
from .text import *
from .container import *
from .layered import *
from .layout import *
from .. import util


class FakeWidget(object):
    def __init__(self, parent):
        self.peng = parent.peng
        self.parent = parent
        self.submenu = parent

        self.pressed, self.is_hovering, self.enabled = False, False, True

    @property
    def pos(self):
        return [0, 0]  # As property to prevent bug with accidental manipulation

    @property
    def size(self):
        return self.parent.size



[docs]class GUIMenu(Menu):
    """
    :py:class:`peng3d.menu.Menu` subclass adding 2D GUI Support.
    
    Note that widgets are not managed directly by this class, but rather by each :py:class:`SubMenu`\ .
    """
    def __init__(self,name,window,peng,
                 font="Arial", font_size=16,
                 font_color=[62, 67, 73, 255],
                 borderstyle="flat",
                 ):
        super(GUIMenu,self).__init__(name,window,peng)
        pyglet.clock.schedule_interval(lambda dt: None,1./30)
        self.submenus = {}
        self.activeSubMenu = None

        self.font = font
        self.font_size = font_size
        self.font_color = font_color
        self.borderstyle = borderstyle

        self.batch2d = pyglet.graphics.Batch()

        self.bg = [242, 241, 240, 255]
        self.bg_vlist = pyglet.graphics.vertex_list(4,
                                                    "v2f",
                                                    "c4B",
                                                    )

        # For compatibility with Background classes
        self.pressed, self.is_hovering, self.enabled = False, False, True

        self.peng.keybinds.add("enter", f"peng3d:menu.[{self.name}].send_form", self._on_send_form, False)

        self.peng.registerEventHandler("on_resize", self.on_resize)
        self.on_resize(*self.size)
    

[docs]    def addSubMenu(self,submenu):
        """
        Adds a :py:class:`SubMenu` to this Menu.
        
        Note that nothing will be displayed unless a submenu is activated.
        """
        self.submenus[submenu.name] = submenu


[docs]    def changeSubMenu(self,submenu):
        """
        Changes the submenu that is displayed.
        
        :raises ValueError: if the name was not previously registered
        """
        if submenu not in self.submenus:
            raise ValueError("Submenu %s does not exist!"%submenu)
        elif submenu == self.activeSubMenu:
            return # Ignore double submenu activation to prevent bugs in submenu initializer
        old = self.activeSubMenu
        self.activeSubMenu = submenu
        if old is not None:
            self.submenus[old].on_exit(submenu)
            self.submenus[old].doAction("exit")
        self.submenu.on_enter(old)
        self.submenu.doAction("enter")

    

[docs]    def draw(self):
        """
        Draws each menu layer and the active submenu.
        
        Note that the layers are drawn first and may be overridden by the submenu and widgets.
        """
        super(GUIMenu,self).draw()
        # TODO: find a way to re-raise these exceptions bypassing pyglet
        try:
            self.submenu.draw()
        except (AttributeError, TypeError):
            import traceback
            traceback.print_exc()


    def draw_bg(self):
        # Draws the background
        if isinstance(self.bg, Layer):
            self.bg._draw()
        elif hasattr(self.bg, "draw") and callable(self.bg.draw):
            self.bg.draw()
        elif isinstance(self.bg, list) or isinstance(self.bg, tuple):
            self.bg_vlist.draw(GL_QUADS)
        elif callable(self.bg):
            self.bg()
        elif isinstance(self.bg, Background):
            # The background will be drawn via the batch
            if not self.bg.initialized:
                self.bg.init_bg()
                self.bg.redraw_bg()
                self.bg.initialized = True
        elif self.bg == "blank":
            pass
        elif self.bg is None:
            raise RuntimeError("Cannot set Menu background to None")
        else:
            raise TypeError("Unknown/Unsupported background type")

        self.batch2d.draw()

    def setBackground(self, bg):
        self.bg = bg
        if isinstance(bg, list) or isinstance(bg, tuple):
            if len(bg) == 3 and isinstance(bg, list):
                bg.append(255)
            self.bg_vlist.colors = bg * 4
        elif bg in ["flat", "gradient", "oldshadow", "material"]:
            self.bg = ContainerButtonBackground(self, borderstyle=bg)
            self.on_resize(self.window.width, self.window.height)
    
    @property
    def submenu(self):
        """
        Property containing the :py:class:`SubMenu` instance that is currently active.
        """
        return self.submenus[self.activeSubMenu]

    # The following properties are needed for compatibility with Background classes
    @property
    def pos(self):
        return [0, 0]  # As property to prevent bug with accidental manipulation

    @property
    def size(self):
        return self.window.get_size()

    def on_resize(self, width, height):
        sx,sy = width,height
        self.bg_vlist.vertices = [0,0, sx,0, sx,sy, 0,sy]
        if isinstance(self.bg,Background):
            if not self.bg.initialized:
                self.bg.init_bg()
                self.bg.initialized=True
            self.bg.redraw_bg()


[docs]    def on_enter(self, old):
        super().on_enter(old)

        self.submenu.redraw()


    def _on_send_form(self, symbol, modifiers, release):
        # TODO: support context here
        if release:
            return
        self.submenu.send_form()





[docs]class GUILayer(GUIMenu,Layer2D):
    """
    Hybrid of :py:class:`GUIMenu` and :py:class:`peng3d.layer.Layer2D`\ .
    
    This class allows you to create Head-Up Displays and other overlays easily.
    """
    # TODO: add safety recursion breaker if this is added as a layer to itself
    def __init__(self,name,menu,window,peng):
        Layer2D.__init__(self,menu,window,peng)
        GUIMenu.__init__(self,menu.name,window,peng)

[docs]    def draw(self):
        """
        Draws the Menu.
        """
        self.predraw()
        GUIMenu.draw(self)
        self.postdraw()


# Hack to allow Container to use the drawing method of SubMenu for itself
from ..gui import container
container.SubMenu = SubMenu

# To allow menus to subclass SubMenu
from .menus import *