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| author | Jeff Armstrong <jeffrey.armstrong@approximatrix.com> | 2011-07-26 22:51:42 -0400 |
|---|---|---|
| committer | Jeff Armstrong <jeffrey.armstrong@approximatrix.com> | 2011-07-26 22:51:42 -0400 |
| commit | 91e322ca508df43b9d5498b0f48839a79177ac90 (patch) | |
| tree | 44f09976ac7fa31de93a7a519a93eab7d977fa67 /example/pngview.py | |
| parent | e4d9f600d8359e82b7a689896727080d570ab8a8 (diff) | |
| download | gempy-91e322ca508df43b9d5498b0f48839a79177ac90.tar.gz gempy-91e322ca508df43b9d5498b0f48839a79177ac90.zip | |
Added initial skeleton app that displays PNGs and kinda works.
Diffstat (limited to 'example/pngview.py')
| -rw-r--r-- | example/pngview.py | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/example/pngview.py b/example/pngview.py new file mode 100644 index 0000000..d53e166 --- /dev/null +++ b/example/pngview.py @@ -0,0 +1,130 @@ +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])
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