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