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
|
""" Demonstration of the Blt Graph widget.
"""
# Import Pmw from the sibling directory.
import sys
sys.path[:0] = ['../../..']
import string
import Tkinter
import Pmw
# Simple random number generator.
rand = 12345
def random():
global rand
rand = (rand * 125) % 2796203
return rand
class GraphDemo(Pmw.MegaToplevel):
def __init__(self, parent=None, **kw):
# Define the megawidget options.
optiondefs = (
('size', 10, Pmw.INITOPT),
)
self.defineoptions(kw, optiondefs)
# Initialise the base class (after defining the options).
Pmw.MegaToplevel.__init__(self, parent)
# Create the graph.
self.createWidgets()
# Check keywords and initialise options.
self.initialiseoptions(GraphDemo)
def createWidgets(self):
# Create vectors for use as x and y data points.
self._numElements = 7
self._vectorSize = self['size']
self._vector_x = Pmw.Blt.Vector()
self._vector_y = []
for y in range(self._numElements):
self._vector_y.append(Pmw.Blt.Vector())
for index in range(self._vectorSize):
self._vector_x.append(index)
for y in range(self._numElements):
self._vector_y[y].append(random() % 100)
interior = self.interior()
# Create a button box and add some buttons
self._buttons = Pmw.ButtonBox(interior)
buttonInfo = (
('Stacked', self._stacked),
('Normal', self._normal),
('Reverse', self._reverse),
('Bar', self._bar),
('Line', self._line),
('Bars and lines', self._barsandlines),
('Add point', self._addpoint),
('Clear', self._clear),
('Buffer', self._buffer),
('Close', self.destroy),
)
for text, callback in buttonInfo:
self._buttons.add(text,
command = Pmw.busycallback(callback))
self._buttons.pack(side = 'bottom', fill = 'x', expand = 0)
# Create the graph and its elements.
self._graph = Pmw.Blt.Graph(interior)
self._graph.pack(expand = 1, fill = 'both')
self._graph.yaxis_configure(command=self.yaxisCommand)
self._createElements('bar')
def yaxisCommand(self, graph, value):
num = string.atoi(value)
return '%d %3d' % (num * 3, num)
def _createElements(self, type):
self._clear()
colorList = Pmw.Color.spectrum(self._numElements)
for elem in range(self._numElements):
if elem == 0:
hue = None
else:
hue = (elem + 1.0) / self._numElements * 6.28318
foreground = colorList[elem]
background = Pmw.Color.changebrightness(self, foreground, 0.8)
if type == 'barsandlines':
if elem < self._numElements / 2:
bar = 1
else:
bar = 0
elif type == 'bar':
bar = 1
else:
bar = 0
if bar:
self._graph.element_bar(
'var' + str(elem),
xdata=self._vector_x,
ydata=self._vector_y[elem],
foreground = foreground,
background = background)
else:
self._graph.element_line(
'var' + str(elem),
linewidth = 4,
xdata=self._vector_x,
ydata=self._vector_y[elem],
color = foreground)
def _stacked(self):
self._graph.configure(barmode = 'stacked')
def _normal(self):
self._graph.configure(barmode = 'normal')
def _reverse(self):
element_list = list(self._graph.element_show())
element_list.reverse()
self._graph.element_show(element_list)
def _bar(self):
self._createElements('bar')
def _line(self):
self._createElements('line')
def _barsandlines(self):
self._createElements('barsandlines')
def _addpoint(self):
self._vector_x.append(self._vectorSize)
for y in range(self._numElements):
self._vector_y[y].append(random() % 100)
self._vectorSize = self._vectorSize + 1
def _clear(self):
self._graph.element_delete('*')
def _buffer(self):
buffered = string.atoi(self._graph.cget('bufferelements'))
self._graph.configure(bufferelements = not buffered)
class Demo:
def __init__(self, parent):
if not Pmw.Blt.haveblt(parent):
message = 'Sorry\nThe BLT package has not been\n' + \
'installed on this system.\n' + \
'Please install it and try again.'
w = Tkinter.Label(parent, text = message)
w.pack(padx = 8, pady = 8)
return
message = 'This is a simple demonstration of the\n' + \
'BLT graph widget.\n' + \
'Select the number of points to display and\n' + \
'click on the button to display the graph.'
w = Tkinter.Label(parent, text = message)
w.pack(padx = 8, pady = 8)
# Create combobox to select number of points to display.
self.combo = Pmw.ComboBox(parent,
scrolledlist_items = ('10', '25', '50', '100', '300'),
entryfield_value = '10')
self.combo.pack(padx = 8, pady = 8)
# Create button to start blt graph.
start = Tkinter.Button(parent,
text = 'Show BLT graph',
command = Pmw.busycallback(self.showGraphDemo))
start.pack(padx = 8, pady = 8)
self.parent = parent
def showGraphDemo(self):
size = string.atoi(self.combo.get())
GraphDemo(self.parent, size = size)
######################################################################
# Create demo in root window for testing.
if __name__ == '__main__':
root = Tkinter.Tk()
Pmw.initialise(root, fontScheme = 'pmw1')
root.title('Blt graph demonstration')
exitButton = Tkinter.Button(root, text = 'Exit', command = root.destroy)
exitButton.pack(side = 'bottom')
widget = Demo(root)
root.mainloop()
|
