# Module 'tablewin'
# Display a table, with per-item actions:
# A1 | A2 | A3 | .... | AN
# B1 | B2 | B3 | .... | BN
# C1 | C2 | C3 | .... | CN
# .. | .. | .. | .... | ..
# Z1 | Z2 | Z3 | .... | ZN
# Not all columns need to have the same length.
# The data structure is a list of columns;
# each column is a list of items.
# Each item is a pair of a string and an action procedure.
# The first item may be a column title.
import stdwin
import gwin
from stdwinevents import *
def open(title, data): # Public function to open a table window
#
# Set geometry parameters (one day, these may be changeable)
#
margin = stdwin.textwidth(' ')
lineheight = stdwin.lineheight()
#
# Geometry calculations
#
colstarts = [0]
totwidth = 0
maxrows = 0
for coldata in data:
# Height calculations
rows = len(coldata)
if rows > maxrows: maxrows = rows
# Width calculations
width = colwidth(coldata) + margin
totwidth = totwidth + width
colstarts.append(totwidth)
#
# Calculate document and window height
#
docwidth, docheight = totwidth, maxrows*lineheight
winwidth, winheight = docwidth, docheight
if winwidth > stdwin.textwidth('n')*100: winwidth = 0
if winheight > stdwin.lineheight()*30: winheight = 0
#
# Create the window
#
stdwin.setdefwinsize(winwidth, winheight)
w = gwin.open(title)
#
# Set properties and override methods
#
w.data = data
w.margin = margin
w.lineheight = lineheight
w.colstarts = colstarts
w.totwidth = totwidth
w.maxrows = maxrows
w.selection = (-1, -1)
w.lastselection = (-1, -1)
w.selshown = 0
w.setdocsize(docwidth, docheight)
w.draw = draw
w.mup = mup
w.arrow = arrow
#
# Return
#
return w
def update(w, data): # Change the data
#
# Hide selection
#
hidesel(w, w.begindrawing())
#
# Get old geometry parameters
#
margin = w.margin
lineheight = w.lineheight
#
# Geometry calculations
#
colstarts = [0]
totwidth = 0
maxrows = 0
for coldata in data:
# Height calculations
rows = len(coldata)
if rows > maxrows: maxrows = rows
# Width calculations
width = colwidth(coldata) + margin
totwidth = totwidth + width
colstarts.append(totwidth)
#
# Calculate document and window height
#
docwidth, docheight = totwidth, maxrows*lineheight
#
# Set changed properties and change window size
#
w.data = data
w.colstarts = colstarts
w.totwidth = totwidth
w.maxrows = maxrows
w.change((0, 0), (10000, 10000))
w.setdocsize(docwidth, docheight)
w.change((0, 0), (docwidth, docheight))
#
# Show selection, or forget it if out of range
#
showsel(w, w.begindrawing())
if not w.selshown: w.selection = (-1, -1)
def colwidth(coldata): # Subroutine to calculate column width
maxwidth = 0
for string, action in coldata:
width = stdwin.textwidth(string)
if width > maxwidth: maxwidth = width
return maxwidth
def draw(w, ((left, top), (right, bottom))): # Draw method
ileft = whichcol(w, left)
iright = whichcol(w, right-1) + 1
if iright > len(w.data): iright = len(w.data)
itop = divmod(top, w.lineheight)[0]
if itop < 0: itop = 0
ibottom, remainder = divmod(bottom, w.lineheight)
if remainder: ibottom = ibottom + 1
d = w.begindrawing()
if ileft <= w.selection[0] < iright:
if itop <= w.selection[1] < ibottom:
hidesel(w, d)
d.erase((left, top), (right, bottom))
for i in range(ileft, iright):
col = w.data[i]
jbottom = len(col)
if ibottom < jbottom: jbottom = ibottom
h = w.colstarts[i]
v = itop * w.lineheight
for j in range(itop, jbottom):
string, action = col[j]
d.text((h, v), string)
v = v + w.lineheight
showsel(w, d)
def mup(w, detail): # Mouse up method
(h, v), nclicks, button, mask = detail
icol = whichcol(w, h)
if 0 <= icol < len(w.data):
irow = divmod(v, w.lineheight)[0]
col = w.data[icol]
if 0 <= irow < len(col):
string, action = col[irow]
action(w, string, (icol, irow), detail)
def whichcol(w, h): # Return column number (may be >= len(w.data))
for icol in range(0, len(w.data)):
if h < w.colstarts[icol+1]:
return icol
return len(w.data)
def arrow(w, type):
if type == WC_LEFT:
incr = -1, 0
elif type == WC_UP:
incr = 0, -1
elif type == WC_RIGHT:
incr = 1, 0
elif type == WC_DOWN:
incr = 0, 1
else:
return
icol, irow = w.lastselection
icol = icol + incr[0]
if icol < 0: icol = len(w.data)-1
if icol >= len(w.data): icol = 0
if 0 <= icol < len(w.data):
irow = irow + incr[1]
if irow < 0: irow = len(w.data[icol]) - 1
if irow >= len(w.data[icol]): irow = 0
else:
irow = 0
if 0 <= icol < len(w.data) and 0 <= irow < len(w.data[icol]):
w.lastselection = icol, irow
string, action = w.data[icol][irow]
detail = (0, 0), 1, 1, 1
action(w, string, (icol, irow), detail)
# Selection management
# TO DO: allow multiple selected entries
def select(w, selection): # Public function to set the item selection
d = w.begindrawing()
hidesel(w, d)
w.selection = selection
showsel(w, d)
if w.selshown: lastselection = selection
def hidesel(w, d): # Hide the selection, if shown
if w.selshown: invertsel(w, d)
def showsel(w, d): # Show the selection, if hidden
if not w.selshown: invertsel(w, d)
def invertsel(w, d): # Invert the selection, if valid
icol, irow = w.selection
if 0 <= icol < len(w.data) and 0 <= irow < len(w.data[icol]):
left = w.colstarts[icol]
right = w.colstarts[icol+1]
top = irow * w.lineheight
bottom = (irow+1) * w.lineheight
d.invert((left, top), (right, bottom))
w.selshown = (not w.selshown)
# Demonstration
def demo_action(w, string, (icol, irow), detail): # Action function for demo
select(w, (irow, icol))
def demo(): # Demonstration
da = demo_action # shorthand
col0 = [('a1', da), ('bbb1', da), ('c1', da)]
col1 = [('a2', da), ('bbb2', da)]
col2 = [('a3', da), ('b3', da), ('c3', da), ('d4', da), ('d5', da)]
col3 = []
for i in range(1, 31): col3.append(('xxx' + `i`, da))
data = [col0, col1, col2, col3]
w = open('tablewin.demo', data)
gwin.mainloop()
return w
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