Re: Control what happens when GtkTextView is resized: keep the bottom part visible
Todor Todorov wrote: Well, since resizing the widget by itself does not do any scrolling, whichever value you get from the adjustment _is_ the current scroll value. In the same way you have the function *_get_upper(), you have *_get_lower() and *_get_value()... Just change the computation however you need it to be. Did you even looked up the functions I used in the API docs? You would have seen the rest You're right, I was wrong about the requirements. I've come to the conclusion that what is necessary is to keep the value (upper - (value + page_size)) constant when resizing happens. This value represents the size of the part of the scrollable widget (a GtkTextView in this case) that remains below the currently displayed portion. That means adjusting the value (which as you said by default is not changed). Well, upper never changes when resizing a widget, so it's only necessary to keep (value + page_size) constant. But page_size _does_ change when resizing happens, so a question very similar to my previous one still holds: is there a way to know the value that the adjustment's page_size had before the resize operation, to compare with the new value caused by the resizing, so that the calculations can be done? I've been able to solve it by storing page_size in a variable at the end of the function and reusing it in the next call, but this is far from elegant. Is there some better way? -- Mere nonexistence is a feeble excuse for declaring a thing unseeable. You *can* see dragons. You just have to look in the right direction. -- John Hasler Eduardo M KALINOWSKI edua...@kalinowski.com.br ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Control what happens when GtkTextView is resized: keep the bottom part visible
I don't believe there is a way to get the size before the change. I do not believe that there is much requirement for that. If you are looking for a more elegant solution, you would have to reimplement GtkViewport or GtkScrolledWindow to keep track of the visible view now and before. Regards, Todor On 11/14/2009 07:10 AM, Eduardo M KALINOWSKI wrote: Todor Todorov wrote: Well, since resizing the widget by itself does not do any scrolling, whichever value you get from the adjustment _is_ the current scroll value. In the same way you have the function *_get_upper(), you have *_get_lower() and *_get_value()... Just change the computation however you need it to be. Did you even looked up the functions I used in the API docs? You would have seen the rest You're right, I was wrong about the requirements. I've come to the conclusion that what is necessary is to keep the value (upper - (value + page_size)) constant when resizing happens. This value represents the size of the part of the scrollable widget (a GtkTextView in this case) that remains below the currently displayed portion. That means adjusting the value (which as you said by default is not changed). Well, upper never changes when resizing a widget, so it's only necessary to keep (value + page_size) constant. But page_size _does_ change when resizing happens, so a question very similar to my previous one still holds: is there a way to know the value that the adjustment's page_size had before the resize operation, to compare with the new value caused by the resizing, so that the calculations can be done? I've been able to solve it by storing page_size in a variable at the end of the function and reusing it in the next call, but this is far from elegant. Is there some better way? ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
