Re: [pygtk] Multi gtk.EventBox and gtk.Image cause artefacts

[Neil Dugan]

MATTHIEU CADET wrote:

According to my problem with gtkEventBox, i've only one solution i think....
there is a way to force refresh all windows and widgets ? maybe my problem
is a display bug or maybe i have too much gtkEventBox with gtkImage .

Please if someone have any solution for me.

I found a C example on how to put a .png image in a cairo widget
http://zetcode.com/tutorials/cairographicstutorial/cairoimages/

Here is a python script.

From: maty...@hotmail.com
To: py...@butterflystitches.com.au
Date: Mon, 26 Jan 2009 19:36:23 +0900
CC: pygtk@daa.com.au
Subject: Re: [pygtk] Multi gtk.EventBox and gtk.Image  cause artefacts









Hi,

I've try to replace gtkEventBox with a gtkButton, but it's the same problem...

At a certain number of button are showed the button is not
clickable :(

Maybe it's another problem with the main Window or may i need
to refresh; redraw or something like that ?

Or maybe it's not possible with gtk to show lot of gtkEventBox,

there is a limit on the EventBox ? or something related to the Window ?

From: maty...@hotmail.com
To: py...@butterflystitches.com.au
Date: Sat, 24 Jan 2009 19:16:17 +0900
CC: pygtk@daa.com.au
Subject: Re: [pygtk] Multi gtk.EventBox and gtk.Image  cause artefacts








Hi,

No i haven't try this solution, but i don't want my image looks like
a button, with the style of button you know rounded, and when you
see the image as a button.

Or maybe i can set a button style to "none" ? without the looks of a button.

I will try this, thanks for your answer.

Maty.

Date: Sat, 24 Jan 2009 13:48:42 +1100
From: py...@butterflystitches.com.au
To: maty...@hotmail.com
CC: pygtk@daa.com.au
Subject: Re: [pygtk] Multi gtk.EventBox and gtk.Image  cause artefacts

MATTHIEU CADET wrote:

I've found a solution to remove those artefacts, but the solution is to don't use gtk.EventBox and just use gtk.Image...

But for the moment its not very good for me because i need to keep

the image as "clickable" so i can get informations of wich image is clicked.

Any help for this please?

Thanks.

Maty.



From: maty...@hotmail.com
To: pygtk@daa.com.au
Date: Tue, 20 Jan 2009 19:54:44 +0900
Subject: [pygtk]  Multi gtk.EventBox and gtk.Image  cause artefacts








Hi everybody!

I'm trying to write a tool in PyGtk that shows user lot of images in a Window,
each images must be "clickable", so i've put all of them into a gtk.EventBox.

The problem now for me is, when the number of images is more than about 45
EventBox shown in the main Window, i got some strange artefacts near to the
last image has been show.

How can i fix those artefacts from EventBox ? and keep my images clickable ?

Here the link to my code;glade and image :

http://www.filefactory.com/file/a02c6df/n/multi_eventbox_example_zip

Please if someone can help me on this.


Thanks a lot.

Maty.

Have you tried making each image a button with the image inside the button?

#!/usr/bin/python

# 48 x 48 pixel image
filename="apple-red.png"

import cairo
import gtk



class ImageFace(gtk.DrawingArea):
        def __init__(self):
                gtk.DrawingArea.__init__(self)
                # load the image
                self.image = cairo.ImageSurface.create_from_png(filename)
                # the two callback needed
                self.connect("expose_event", self.expose)
                self.connect("button_press_event", self.on_button_press)
        # set the button press event to happen
                self.add_events(gtk.gdk.BUTTON_PRESS_MASK)
                self.set_size_request(610, 610)
                
        def expose(self, widget, event):
                cr = widget.window.cairo_create()
                # draw the image 100 times
                for x in range(10,560,60) :
                        for y in range(10,560,60) :
                                cr.set_source_surface(self.image, x, y)
                                cr.paint();
                return False

        def on_button_press(self, widget, event):
                # filter out all but the left mouse clicks
                if event.button == 1 :
                        # find out where in the image we clicked
                        x = event.x % 60
                        y = event.y % 60
                        # see if we are on an image
                        if x > 12 and y > 17 and x < 50 and y < 50 :
                                # print what image we clicked on
                                print "you clicked on image %d x %d" % 
(int(event.x / 60), int(event.y / 60))


def main():
        window = gtk.Window()
        images = ImageFace()
        sw = gtk.ScrolledWindow()
        window.add(sw)
        sw.add_with_viewport(images)
        window.connect("destroy", gtk.main_quit)
        window.show_all()
    
        gtk.main()
    
if __name__ == "__main__":
    main()

<<inline: apple-red.png>>

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