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
|
from numpy import array
from enable.api import Canvas, Viewport, Window, Scrolled
from enable.tools.api import ViewportPanTool
from enable.primitives.api import Box
from enable.example_support import demo_main, DemoFrame
class MyFrame(DemoFrame):
def _create_window(self):
canvas = Canvas(bgcolor="lightsteelblue", draw_axes=True)
boxgridsize = 8
boxsize = 50
spacing = boxsize * 2
offset = spacing / 2
origin_color = array([0.0, 0.0, 1.0])
x_color = array([0.0, 1.0, 0.0])
y_color = array([1.0, 0.0, 0.0])
for i in range(boxgridsize):
for j in range(boxgridsize):
color = tuple(x_color / (boxgridsize - 1) * i + \
y_color / (boxgridsize - 1) * j + \
origin_color) + (1.0,)
box = Box(color=color, bounds=[boxsize, boxsize], resizable="")
box.position= [i*spacing + offset - boxsize/2 + 0.5,
j*spacing + offset - boxsize/2 + 0.5]
canvas.add(box)
viewport = Viewport(component=canvas, enable_zoom=True)
viewport.view_position = [0,0]
viewport.tools.append(ViewportPanTool(viewport))
# Uncomment the following to enforce limits on the zoom
#viewport.min_zoom = 0.1
#viewport.max_zoom = 3.0
scrolled = Scrolled(canvas, fit_window = True,
inside_padding_width = 0,
mousewheel_scroll = False,
viewport_component = viewport,
always_show_sb = True,
continuous_drag_update = True)
return Window(self, -1, component=scrolled)
if __name__ == "__main__":
demo = demo_main(MyFrame, title="Canvas example")
|
