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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
class PictureWindow(gem.Window):
def __init__(self,app,filename,wh,data):
gem.Window.__init__(self, type=gem.NAME|gem.CLOSER|gem.MOVER)
self.set_name(filename)
self.data = data
self.open((10,10,wh[0],wh[1]+10))
def draw(self):
self.begin_update()
vh = self.graphics_handle()
wrect = self.get_work_rect()
for rect in self.get_invalid_rectangles():
todraw = self.intersect_work_area(rect)
if todraw is not None:
gem.vdi.vs_clip(vh, True, todraw)
image_y = 0
for r in self.data:
image_x = 0
for c in r:
if c > 128:
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
image_y = image_y + 1
gem.vdi.vs_clip(vh, False, todraw)
self.end_update()
class LoadingWindow(gem.Window):
def __init__(self,app,filename):
gem.Window.__init__(self, type=gem.NAME|gem.CLOSER)
self.set_name("Loading "+filename)
self.reader = png.Reader(filename)
self.raw_data = self.reader.asRGBA8()
self.data = []
self.done = False
self.row = 0
#self.load_thread = threading.Thread(target=self.load)
#self.load_thread.start()
def load(self):
rgbdata = self.raw_data[2]
for r in rgbdata:
self.row = self.row + 1
pvalue = 0
pcount = 0
row = []
for c in r:
if pcount < 3:
pvalue = pvalue + c
pcount = pcount + 1
if pcount == 4:
pvalue = pvalue / 3
row.append(pvalue)
#if image_x > data[0]:
# raise RuntimeError("Point {0} exceeds limit {1}".format(image_x,data[0]))
pcount = 0
pvalue = 0
self.data.append(row)
self.draw()
self.done = True
self.close()
#self.app.send_message((0,self.app.id,0,gem.WM_CLOSED))
def draw(self):
wrect = self.get_work_rect()
vh = self.graphics_handle()
self.begin_update()
for r in self.get_invalid_rectangles():
todraw = self.intersect_work_area(r)
if todraw is not None:
gem.vdi.vs_clip(vh, True, todraw)
w = wrect[2]*self.row/self.raw_data[1]
gem.vdi.vsf_color(vh,0)
gem.vdi.bar(vh,(wrect[0],wrect[1],w,wrect[3]))
gem.vdi.vsf_color(vh,1)
gem.vdi.bar(vh,(wrect[0]+w,wrect[1],wrect[2]-w,wrect[3]))
gem.vdi.vs_clip(vh, False, todraw)
self.end_update()
class AppMessageEvent(gem.MessageEvent):
def __init__(self,app,window):
gem.MessageEvent.__init__(self)
self.app = app
self.window = window
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:
self.window.draw()
# Menu handling
elif self.message == gem.MN_SELECTED:
self.handle_menu(self.get_word(4),title=self.get_word(3))
def start_app(filename):
app = gem.Application()
app.load_resource("simple.rsc")
app.set_menu(MENU)
wload = LoadingWindow(app,filename)
app.windows.append(wload)
wload.open((10,10,250,50))
wload.load()
#app.message_event = AppMessageEvent(app,wload)
#app.event_loop()
wpic = PictureWindow(app,filename,(wload.raw_data[0],wload.raw_data[1]),wload.data)
app.windows.append(wpic)
app.message_event = AppMessageEvent(app,wpic)
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])
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