1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
# 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
|
