Initial revision

Lib/stdwin/gwin.py

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+# Module 'gwin'
+# Generic stdwin windows
+
+# This is used as a base class from which to derive other window types.
+# The mainloop() function here is an event dispatcher for all window types.
+
+import stdwin
+import stdwinsupport
+
+S = stdwinsupport			# Shorthand
+
+windows = []				# List of open windows
+
+
+# Open a window
+
+def open(title):			# Open a generic window
+	w = stdwin.open(title)
+	stdwin.setdefwinsize(0, 0)
+	# Set default event handlers
+	w.draw = nop
+	w.char = nop
+	w.mdown = nop
+	w.mmove = nop
+	w.mup = nop
+	w.m2down = m2down
+	w.m2up = m2up
+	w.size = nop
+	w.move = nop
+	w.activate = w.deactivate = nop
+	w.timer = nop
+	# default command handlers
+	w.close = close
+	w.tab = tab
+	w.enter = enter
+	w.backspace = backspace
+	w.arrow = arrow
+	w.kleft = w.kup = w.kright = w.kdown = nop
+	windows.append(w)
+	return w
+
+
+# Generic event dispatching
+
+def mainloop():				# Handle events until no windows left
+	while windows:
+		treatevent(stdwin.getevent())
+
+def treatevent(e):			# Handle a stdwin event
+	type, w, detail = e
+	if type = S.we_draw:
+		w.draw(w, detail)
+	elif type = S.we_menu:
+		m, item = detail
+		m.action[item](w, m, item)
+	elif type = S.we_command:
+		treatcommand(w, detail)
+	elif type = S.we_char:
+		w.char(w, detail)
+	elif type = S.we_mouse_down:
+		if detail[1] > 1: w.m2down(w, detail)
+		else: w.mdown(w, detail)
+	elif type = S.we_mouse_move:
+		w.mmove(w, detail)
+	elif type = S.we_mouse_up:
+		if detail[1] > 1: w.m2up(w, detail)
+		else: w.mup(w, detail)
+	elif type = S.we_size:
+		w.size(w, w.getwinsize())
+	elif type = S.we_activate:
+		w.activate(w)
+	elif type = S.we_deactivate:
+		w.deactivate(w)
+	elif type = S.we_move:
+		w.move(w)
+	elif type = S.we_timer:
+		w.timer(w)
+
+def treatcommand(w, type):		# Handle a we_command event
+	if type = S.wc_close:
+		w.close(w)
+	elif type = S.wc_return:
+		w.enter(w)
+	elif type = S.wc_tab:
+		w.tab(w)
+	elif type = S.wc_backspace:
+		w.backspace(w)
+	elif type in (S.wc_left, S.wc_up, S.wc_right, S.wc_down):
+		w.arrow(w, type)
+
+
+# Methods
+
+def close(w):				# Close method
+	for i in range(len(windows)):
+		if windows[i] is w:
+			del windows[i]
+			break
+
+def arrow(w, detail):			# Arrow key method
+	if detail = S.wc_left:
+		w.kleft(w)
+	elif detail = S.wc_up:
+		w.kup(w)
+	elif detail = S.wc_right:
+		w.kright(w)
+	elif detail = S.wc_down:
+		w.kdown(w)
+
+
+# Trivial methods
+
+def tab(w): w.char(w, '\t')
+def enter(w): w.char(w, '\n')		# 'return' is a Python reserved word
+def backspace(w): w.char(w, '\b')
+def m2down(w, detail): w.mdown(w, detail)
+def m2up(w, detail): w.mup(w, detail)
+def nop(args): pass