Thanks Benoit, I now understand why there is both picture and image in the picturebox component.
Just one thing: would it make things easier for Robert (original poster) if he used gb.gtk rather than gb.qt; I'm not so clear about that. Budgieboy That's 2008/11/29 Benoit Minisini <[EMAIL PROTECTED]> > On samedi 29 novembre 2008, John Harrold wrote: > > I'm no Gambas expert but as far as I understand you can't reference the > > image that way. > > > > you would need to do: > > > > DIM myImg as Image > > myImg=PicBox.Picture.Image > > > > Even then I think it will make a copy of the image and not be an alias. > If > > you make changes to myImg to have them reflected in the original you > would > > have to write back the image: > > > > PicBox.Picture.Image=myImg > > > > Dont think that makes things any easier. > > > > Budgieboy > > > > To understand why thing are not easier, you must know that on X-Window > systems, an image can be stored: > > - In the program (the process that uses the GUI), an "Image" in Gambas. > > - Or directly in the X-Window process, a "Picture" in Gambas. > > Alas, you can only use X-Window drawing commands on Pictures, not on > Images. > On the contrary, you can only access individual pixels on Images, not on > Pictures. > > The Picture.Image and Image.Picture properties actually move the image data > between the X-Window server and your program. It is a relatively heavy > process, especially when the image is big. But there is no other way! > > This is not really true with gb.gtk, as in gb.gtk the conversion is not > done > when you use the Picture.Image or Image.Picture property, but only when it > is > really needed. > > For example, if you really access individual pixels, then the image data > will > be moved to your process. Not when you will use the Picture.Image property. > > I hope I was clear enough! > > Regards, > -- > Benoit Minisini > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Gambas-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/gambas-user > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Gambas-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/gambas-user
