# GL STDWIN
#
# See stdwingl for a convenient hack to use this instead of built-in stdwin
# without modifying your application, except for one line in the main file.
#
# Intrinsic differences with built-in stdwin (hard or impossible to fix):
# - Need to call w.close() to close a window !!!
# - Need to call m.close() to remove a menu !!!
# - Doesn't enforce the existence of at most one drawing object
# - No textedit package
# - No X11 selections
#
# Not yet implemented:
# - shade drawing
# - elliptical arc drawing (need to play with transformation)
# - more than one mouse button
# - scroll bars (need to redo viewport handling to get this)
# - partial redraws
# - dialog boxes
# - timer events
# - cursors
#
# Extra features:
# - color (for now, you need to know the colormap index)
import gl
import fm
from GL import *
from DEVICE import *
from stdwinevents import *
# Customizable constants
#
DEF_FONT = 'Times-Roman' # Default font
DEF_SIZE = 12 # Default font size (points)
MASK = 20 # Viewport minus scrmask
# A structure to hold global variables
#
class Struct: pass
G = Struct()
#
G.queue = [] # Pending STDWIN events
G.drawqueue = [] # Windows that need WE_REDRAW
G.windowmap = {} # Map window id to window object
G.windowmap['0'] = None # For convenience
G.focus = None # Input focus
G.fg = BLACK # Foreground color
G.bg = WHITE # Background color
G.def_size = 0, 0 # Default window size
G.def_pos = 0, 0 # Default window position
#
G.size = DEF_SIZE
G.font = fm.findfont(DEF_FONT).scalefont(G.size)
# Initialize GL
#
gl.foreground()
gl.noport()
dummygid = gl.winopen('')
# Ask for all sorts of events
#
# Both REDRAW (= resize and/or redraw!) and INPUTCHANGE are implicitly queued
#qdevice(REDRAW)
#qdevice(INPUTCHANGE)
#
# Keyboard
gl.qdevice(KEYBD)
gl.qdevice(LEFTARROWKEY)
gl.qdevice(RIGHTARROWKEY)
gl.qdevice(UPARROWKEY)
gl.qdevice(DOWNARROWKEY)
gl.qdevice(LEFTALTKEY)
gl.qdevice(RIGHTALTKEY)
#
# Mouse
gl.qdevice(LEFTMOUSE)
#gl.qdevice(MIDDLEMOUSE)
gl.qdevice(RIGHTMOUSE) # Menu button
# NB MOUSEX, MOUSEY events are queued on button down
#
# Window close requests
gl.qdevice(WINQUIT)
gl.qdevice(WINSHUT)
#
# These aren't needed
#gl.qdevice(TIMER0)
#gl.qdevice(WINFREEZE)
#gl.qdevice(WINTHAW)
#gl.qdevice(REDRAWICONIC)
# STDWIN: create a new window
#
def open(title):
h, v = G.def_pos
width, height = G.def_size
if h > 0 or v > 0:
# Choose arbitrary defaults
if h < 0: h = 10
if v < 0: v = 30
if width <= 0: width = 400
if height <= 0: height = 300
gl.prefposition(h, h+width, 1024-v, 1024-v-height)
elif width > 0 or height > 0:
if width <= 0: width = 400
if height <= 0: height = 300
gl.prefsize(width, height)
from glstdwwin import WindowObject
win = WindowObject()._init(title)
G.windowmap[`win._gid`] = win
return win
# STDWIN: set default initial window position (0 means use default)
#
def setdefwinpos(h, v):
G.def_pos = h, v
# STDWIN: set default window size (0 means use default)
#
def setdefwinsize(width, height):
G.def_size = width, height
# STDWIN: beep or ring the bell
#
def fleep():
gl.ringbell()
# STDWIN: set default foreground color
#
def setfgcolor(color):
G.fg = color
# STDWIN: set default background color
#
def setbgcolor(color):
G.bg = color
# STDWIN: get default foreground color
#
def getfgcolor():
return G.fgcolor
# STDWIN: get default background color
#
def getbgcolor():
return G.bgcolor
# Table mapping characters to key codes
#
key2code = key = {}
key['A'] = AKEY
key['B'] = BKEY
key['C'] = CKEY
key['D'] = DKEY
key['E'] = EKEY
key['F'] = FKEY
key['G'] = GKEY
key['H'] = HKEY
key['I'] = IKEY
key['J'] = JKEY
key['K'] = KKEY
key['L'] = LKEY
key['M'] = MKEY
key['N'] = NKEY
key['O'] = OKEY
key['P'] = PKEY
key['Q'] = QKEY
key['R'] = RKEY
key['S'] = SKEY
key['T'] = TKEY
key['U'] = UKEY
key['V'] = VKEY
key['W'] = WKEY
key['X'] = XKEY
key['Y'] = YKEY
key['Z'] = ZKEY
key['0'] = ZEROKEY
key['1'] = ONEKEY
key['2'] = TWOKEY
key['3'] = THREEKEY
key['4'] = FOURKEY
key['5'] = FIVEKEY
key['6'] = SIXKEY
key['7'] = SEVENKEY
key['8'] = EIGHTKEY
key['9'] = NINEKEY
del key
#
code2key = {}
codelist = []
for key in key2code.keys():
code = key2code[key]
code2key[`code`] = key
codelist.append(code)
del key
# STDWIN: wait for the next event
#
commands = {}
commands['\r'] = WC_RETURN
commands['\b'] = WC_BACKSPACE
commands['\t'] = WC_TAB
#
def getevent():
while 1:
#
# Get next event from the processed queue, if any
#
if G.queue:
event = G.queue[0]
del G.queue[0]
#print 'getevent from queue -->', event
return event
#
# Get next event from the draw queue, if any,
# but only if there is nothing in the system queue.
#
if G.drawqueue and not gl.qtest():
win = G.drawqueue[0]
del G.drawqueue[0]
gl.winset(win._gid)
gl.color(win._bg)
gl.clear()
event = WE_DRAW, win, win._area
#print 'getevent from drawqueue -->', event
return event
#
# Get next event from system queue, blocking if necessary
# until one is available.
# Some cases immediately return the event, others do nothing
# or append one or more events to the processed queue.
#
dev, val = gl.qread()
#
if dev == REDRAW:
win = G.windowmap[`val`]
old_area = win._area
win._fixviewport()
win._needredraw()
if old_area <> win._area:
#print 'getevent --> WE_SIZE'
return WE_SIZE, win, None
elif dev == KEYBD:
if val == 3:
raise KeyboardInterrupt # Control-C in window
character = chr(val)
if commands.has_key(character):
return WE_COMMAND, G.focus, commands[character]
return WE_CHAR, G.focus, character
elif dev == LEFTARROWKEY:
if val:
return WE_COMMAND, G.focus, WC_LEFT
elif dev == RIGHTARROWKEY:
if val:
return WE_COMMAND, G.focus, WC_RIGHT
elif dev == UPARROWKEY:
if val:
return WE_COMMAND, G.focus, WC_UP
elif dev == DOWNARROWKEY:
if val:
return WE_COMMAND, G.focus, WC_DOWN
elif dev in (LEFTALTKEY, RIGHTALTKEY):
if val:
for code in codelist:
gl.qdevice(code)
else:
for code in codelist:
gl.unqdevice(code)
elif dev in codelist:
if val:
event = G.focus._doshortcut(code2key[`dev`])
if event:
return event
elif dev == LEFTMOUSE:
G.mousex = gl.getvaluator(MOUSEX)
G.mousey = gl.getvaluator(MOUSEY)
if val:
type = WE_MOUSE_DOWN
gl.qdevice(MOUSEX)
gl.qdevice(MOUSEY)
else:
type = WE_MOUSE_UP
gl.unqdevice(MOUSEX)
gl.unqdevice(MOUSEY)
return _mouseevent(type)
elif dev == MOUSEX:
G.mousex = val
return _mouseevent(WE_MOUSE_MOVE)
elif dev == MOUSEY:
G.mousey = val
return _mouseevent(WE_MOUSE_MOVE)
elif dev == RIGHTMOUSE: # Menu button press/release
if val: # Press
event = G.focus._domenu()
if event:
return event
elif dev == INPUTCHANGE:
if G.focus:
G.queue.append(WE_DEACTIVATE, G.focus, None)
G.focus = G.windowmap[`val`]
if G.focus:
G.queue.append(WE_ACTIVATE, G.focus, None)
elif dev in (WINSHUT, WINQUIT):
return WE_CLOSE, G.windowmap[`val`], None
else:
print '*** qread() --> dev:', dev, 'val:', val
# Helper routine to construct a mouse (up, move or down) event
#
def _mouseevent(type):
gl.winset(G.focus._gid)
orgx, orgy = gl.getorigin()
sizex, sizey = gl.getsize()
x = G.mousex - orgx
y = G.mousey - orgy
return type, G.focus, ((x, sizey-y), 1, 0, 0)
# STDWIN: text measuring functions
def baseline():
(printermatched, fixed_width, xorig, yorig, xsize, ysize, \
height, nglyphs) = G.font.getfontinfo()
return height - yorig
def lineheight():
(printermatched, fixed_width, xorig, yorig, xsize, ysize, \
height, nglyphs) = G.font.getfontinfo()
return height
def textbreak(string, width):
# XXX Slooooow!
n = len(string)
nwidth = textwidth(string[:n])
while nwidth > width:
n = n-1
nwidth = textwidth(string[:n])
return n
def textwidth(string):
return G.font.getstrwidth(string)
# STDWIN: set default font and size
def setfont(fontname):
G.font = fm.findfont(fontname).scalefont(G.size)
def setsize(size):
ratio = float(size) / float(G.size)
G.size = size
G.font = G.font.scalefont(ratio)
# Utility functions
# Exclusive-or of two BYTES
#
def xor(x, y):
a = bits(x)
b = bits(y)
c = [0, 0, 0, 0, 0, 0, 0, 0]
for i in range(8):
c[i] = (a[i] + b[i]) % 2
return stib(c)
# Return the bits of a byte as a list of 8 integers
#
def bits(x):
b = [0, 0, 0, 0, 0, 0, 0, 0]
for i in range(8):
x, b[i] = divmod(x, 2)
return b
# Convert a list of 8 integers (0|1) to a byte
#
def stib(b):
x = 0
shift = 1
for i in range(8):
x = x + b[i]*shift
shift = shift*2
return x
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