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#!/usr/bin/env python
import gtk, gobject
import gc
class ImageViewer() :
'''
'''
def __init__(self, width, height) :
self.width = width
self.height = height
self.win = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.win.set_border_width(10)
self.win.connect("delete_event", gtk.main_quit)
self.win.connect("destroy", gtk.main_quit)
self.drawing_area = gtk.DrawingArea()
self.drawing_area.set_size_request(self.width, self.height)
self.win.add(self.drawing_area)
self.drawing_area.connect("expose-event", self.expose_handler)
# Just for testing, temporarily
self.num = 0
gobject.timeout_add(2000, self.idle_handler, self.drawing_area)
self.gc = None
self.pixbuf = None
self.imgwidth = None
self.imgheight = None
self.cur_img = None
self.win.show_all()
def expose_handler(self, widget, event) :
#print "Expose"
if not self.gc :
self.gc = widget.window.new_gc()
#x, y, self.imgwidth, self.imgheight = self.get_allocation()
# Have we had load_image called, but we weren't ready for it?
# Now, theoretically, we are ... so call it again.
if self.cur_img and not self.pixbuf :
self.load_image(self.cur_img)
self.show_image()
def load_image(self, filename) :
'''Load the image passed in, and show it.
Return True for success, False for error.
'''
print "Trying to load", filename
self.cur_img = filename
# Clean up memory from any existing pixbuf.
# This still needs to be garbage collected before returning.
if self.pixbuf :
self.pixbuf = None
try :
newpb = gtk.gdk.pixbuf_new_from_file(filename)
self.pixbuf = newpb
except glib.GError, e :
print "glib error -- couldn't load"
print e
self.pixbuf = None
# garbage collect the old pixbuf, if any, and the one we just read in:
newpb = None
gc.collect()
def run(self):
gtk.main()
def show_image(self) :
if not self.gc :
return
if not self.pixbuf :
return
# Clear the drawing area first
# self.drawing_area.window.draw_rectangle(self.gc, True, 0, 0,
# self.width, self.height)
self.drawing_area.window.draw_pixbuf(self.gc, self.pixbuf, 0, 0, 0, 0)
def idle_handler(self, widget) :
self.num += 1
iv.load_image('/home/akkana/src/pho/test-img/%d.jpg' % (self.num % 6 + 1))
iv.show_image()
return True
if __name__ == '__main__':
iv = ImageViewer(640, 480)
iv.load_image('/home/akkana/src/pho/test-img/1.jpg')
iv.run()