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
|
import gem
import gem.vdi
import sys
import png
# Taken from resource headers
MENU = 0
M_ABOUT = 7
M_QUIT = 16
ABOUT = 1
B_ABOUT_OK = 1
def redraw(window,data):
window.begin_update()
vh = window.graphics_handle()
rgbdata = data[2]
wrect = window.get_work_rect()
for r in window.get_invalid_rectangles():
todraw = window.intersect_work_area(r)
if todraw is not None:
gem.vdi.vs_clip(vh, True, todraw)
image_y = 0
for r in rgbdata:
image_x = 0
pvalue = 0
pcount = 0
for c in r:
pvalue = pvalue + c
pcount = pcount + 1
if pcount == 3:
pvalue = pvalue / 3
if c > pvalue:
gem.vdi.vsf_color(vh,0)
else:
gem.vdi.vsf_color(vh,1)
x = wrect[0] + image_x
y = wrect[1] + image_y
gem.vdi.bar(vh,(x,y,1,1))
image_x = image_x + 1
#if image_x > data[0]:
# raise RuntimeError("Point {0} exceeds limit {1}".format(image_x,data[0]))
pcount = 0
pvalue = 0
image_y = image_y + 1
gem.vdi.vs_clip(vh, False, todraw)
window.end_update()
class AppMessageEvent(gem.MessageEvent):
def __init__(self,app):
gem.MessageEvent.__init__(self)
self.app = app
self.window = app.windows[0]
def handle_menu(self, item, title=None):
if item == M_QUIT:
self.app.send_message((gem.WM_CLOSED, 0, 0, self.window.id))
elif item == M_ABOUT:
dlg = self.app.get_resource_address(gem.R_TREE,ABOUT)
self.app.draw_tree(dlg,2)
self.app.form_do(dlg)
if title is not None:
self.app.set_menu_state(title)
def process(self):
# First call the super's process()
gem.MessageEvent.process(self)
if self.message == gem.WM_CLOSED:
self.app.event_processing = False
elif self.message == gem.WM_TOPPED:
self.window.top()
elif self.message == gem.WM_MOVED or self.message == gem.WM_SIZED:
rect = (self.get_word(4),self.get_word(5),self.get_word(6),self.get_word(7))
self.window.resize(rect)
elif self.message == gem.WM_REDRAW:
redraw(self.window,self.app.data)
# Menu handling
elif self.message == gem.MN_SELECTED:
self.handle_menu(self.get_word(4),title=self.get_word(3))
def start_app(filename):
reader = png.Reader(filename)
data = reader.asRGB8()
app = gem.Application()
app.load_resource("simple.rsc")
app.set_menu(MENU)
app.data = data
w = app.new_window((0,10,data[0],data[1]),filename,
type=gem.NAME|gem.MOVER|gem.CLOSER)
app.message_event = AppMessageEvent(app)
app.event_loop()
app.destroy()
if __name__ == "__main__":
print("Simple PNG Viewer for GEM")
if len(sys.argv) < 2:
print("Usage: {0} <png filename>".format(sys.argv[0]))
else:
print("Now processing {0}".format(sys.argv[1]))
start_app(sys.argv[1])
|
