I'm glad you asked!
Here is some sample code to get an application icon based on it's
signature assuming a 32x32 or greater icon. For 16x16 use B_MINI_ICON
in place of B_LARGE_ICON.
#include <AppFileInfo.h>
#include <Bitmap.h>
#include <MimeType.h>
#include <Rect.h>
#include <Roster.h>
const char* signature = "application/x-vnd-MyCoolApp";
BBitmap* icon = new BBitmap(BRect(0, 0, 31, 31), B_RGBA32);
// use BRect(0, 0, 15, 15) for 16x16 icon.
// You may specify larger than 32x32 here and it will scale for you.
// Specify B_CMAP8 for the color space is you want an old school
// 8-bit BeOS icon
app_info appInfo;
if (be_roster->GetAppInfo(signature, &appInfo) == B_OK) {
// fetch the app icon
BFile file(&appInfo.ref, B_READ_ONLY);
BAppFileInfo appMime(&file);
if (appMime.GetIcon(icon, B_LARGE_ICON) != B_OK) {
// couldn't find it, get the generic 3-boxes icon
BMimeType defaultAppMime;
defaultAppMime.SetTo(B_APP_MIME_TYPE);
defaultAppMime.GetIcon(icon, size);
}
}
You can use larger icon sizes and it will automatically scale the
result for you, just make sure to specify B_LARGE_ICON and not
B_MINI_ICON or you may end up with a scaled version of the 16x16 icon
which won't look very good.
Note, I didn't compile the above so it's possible that there are
syntax errors in it.
John Scipione
On Mon, Mar 4, 2013 at 1:38 PM, Andrew Lindesay <apl@xxxxxxxxxxxxxx> wrote:
Hello;
I am wondering what is the best mechanism to obtain the Application's icon
into a BBitmap? I see BAppFileInfo, but can't see how to use it from within
an application.
cheers.
--
Andrew Lindesay