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- # 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
-