# Module 'listwin'
# List windows, a subclass of gwin
import gwin
import stdwin
def maxlinewidth(a): # Compute maximum textwidth of lines in a sequence
max = 0
for line in a:
width = stdwin.textwidth(line)
if width > max: max = width
return max
def action(w, string, i, detail): # Default item selection method
pass
def mup(w, detail): # Mouse up method
(h, v), clicks, button, mask = detail
i = divmod(v, w.lineheight)[0]
if 0 <= i < len(w.data):
w.action(w, w.data[i], i, detail)
def draw(w, ((left, top), (right, bottom))): # Text window draw method
data = w.data
d = w.begindrawing()
lh = w.lineheight
itop = top/lh
ibot = (bottom-1)/lh + 1
if itop < 0: itop = 0
if ibot > len(data): ibot = len(data)
for i in range(itop, ibot): d.text((0, i*lh), data[i])
def open(title, data): # Display a list of texts in a window
lineheight = stdwin.lineheight()
h, v = maxlinewidth(data), len(data)*lineheight
h0, v0 = h + stdwin.textwidth(' '), v + lineheight
if h0 > stdwin.textwidth(' ')*80: h0 = 0
if v0 > stdwin.lineheight()*24: v0 = 0
stdwin.setdefwinsize(h0, v0)
w = gwin.open(title)
w.setdocsize(h, v)
w.lineheight = lineheight
w.data = data
w.draw = draw
w.action = action
w.mup = mup
return w
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