attr. opacity? after a few scales image disappear

[Vladimir]

here ex.:
<?xml version="1.0" encoding="UTF-8"?>

<display>
    <image uri="/usr/share/pixmaps/gdesklets.png"
 on-enter="myOpa(self, 2, 1.0)"
 on-leave="myOpa(self, 1, 0.6)"/>
    <label id="mylabel" value="Hello World!" font="Sans 3cm" color="red"/>
    <prefs>
 <color label="Text Color:" bind="Dsp.mylabel.color"/>
    </prefs>
<script>
status = 0
def myOpa(s,sc,opa):
    s.scale = sc
    s.opacity = opa
</script>
</display>

After enter the image a few times, the one disappear (opacity --> "0")!
if i change scale in line [on-leave="myOpa(self, 1, 0.6)"/>] from "1" to something else (1.1 or 0.9 for ex. [on-leave="myOpa(self, 1.1, 0.6) ] ) the applet works ok!

[Bjoern Koch (h.humpel)]

Confirmed here.
Strange, but true: changing it to
       on-enter="myOpa(2, 0.6)"
       on-leave="myOpa(1, 1.0)"/>
works perfectly... ?!

[Bjoern Koch (h.humpel)]

Pushing it up for the next release (0.36.3) ;).

[Bjoern Koch (h.humpel)]

OK, this one is *really* strange:

on-leave="myOpa(self, 0.999, 0.6)" => WORKING
on-leave="myOpa(self, 1.0, 0.6)" => error
on-leave="myOpa(self, 1.01, 0.6)" => error
on-leave="myOpa(self, 1.02, 0.6)" => error
on-leave="myOpa(self, 1.021, 0.6)" => WORKING

and still (see comment #1): changing on-leave and on-enter is working fine.

OK, just some debugging output to narrow it down (TargetImage.py, lines 172+ changed to):
-----
        self.__widget.render(imgwidth, imgheight, opacity, saturation)
        self.__current_width = imgwidth
        self.__current_height = imgheight
        self.__current_opacity = opacity
        self.__current_saturation = saturation
        print "Opacity: "+str(opacity)
        print "Saturation: "+str(saturation)
        print "Width: "+str(imgwidth)
        print "Height: "+str(imgheight)+"\n"
-----

Is guess this shows when the error occurs:

On startup:

Opacity: 1.0
Saturation: 1.0
Width: 48
Height: 48

Using on-leave="myOpa(self, 1.02, 0.6)", moving in and out:

Opacity: 1.0
Saturation: 1.0
Width: 96
Height: 96

Opacity: 0.6
Saturation: 1.0
Width: 48
Height: 48

Using on-leave="myOpa(self, 1.021, 0.6)", moving in and out:

Opacity: 1.0
Saturation: 1.0
Width: 96
Height: 96

Opacity: 0.6
Saturation: 1.0
Width: 49
Height: 49

And using on-leave="myOpa(self, 0.999, 0.6)", moving in and out:
width and height are set to 47.

So it looks likeeverything is fine when width and height get a new value.

Still wondering why changing on-enter and on-leave (see comment #1) is working though...

[Bjoern Koch (h.humpel)]

Gotcha!

The problme was in utils/render.c:

-----
  if (srcwidth != width || srcheight != height)
    scaled = gdk_pixbuf_scale_simple (pbuf, width, height, GDK_INTERP_BILINEAR);
  else
    scaled = pbuf;
-----

Now the image gets re-rendered everytime (even if width and height stay the same) and everything is working fine.
I am not sure if this has a significant impact on the performace of gDesklets... ?!

Anyway, fixed in rev. #142.