On Thu, Oct 03, 2002 at 04:32:25PM +0500, s. venkata krishnan wrote:
> Hi All
>
> I am working in picogui for the past one week. I am having a problem with the bitmap.
> 1.can i able to add two bitmaps in one button
> i got play bitmap and pause bitmap in one button. when i open an application play
>button has to be displayed. when i click on play,play button has to be changed to
>pause button which is present in that. when i click on pause button again the play
>button has to be displayed.
>
> can i able to toggle between two bitmaps. is there any possiblity of doing it on
>picogui.
>
> If there is any option please let me know it and if u got any example let me know
>where it is
Yes, you can change the bitmap on the button just like you would normally set it.
Allocate your play and pause bitmaps in your program's initialization:
pghandle bPlay, bPause;
bPlay = pgNewBitmap(pgFromFile("playbutton.png"));
bPause = pgNewBitmap(pgFromFile("pausebutton.png"));
Then you can easily switch between them with commands like:
pgSetWidget(myButton,
PG_WP_BITMAP, bPlay,
0);
Another option you might find helpful if you have a lot of bitmaps to store is to use
a theme. This also allows the user more flexibility, since one file can be replaced to
change the application's look if the app is well written. For example, in your theme:
object "my_application/play" bitmap1 = LoadBitmap("playbutton.png");
object "my_application/pause" bitmap1 = LoadBitmap("pausebutton.png");
Then in your app initialization, load the theme:
pgLoadTheme(pgFromFile("mytheme.th"));
Note that if you don't need the theme for the entire length of your program's
execution, pgLoadTheme returns a handle you can delete. Then when you want to switch
buttons, use something like:
pgSetWidget(myButton,
PG_WP_BITMAP, pgThemeLookup(pgFindThemeObject("my_application/play"),
PGTH_P_BITMAP1),
0);
Also note that the result from pgFindThemeObject shouldn't change, so you can store it
to avoid calling pgFindThemeObject each time the button changes.
--Micah
>
> Thanks
> Venkat
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