Claudio Ciccani wrote:
> Ben Combee wrote:
>> Claudio, the Unbind semantics are a little odd. Can you update the
>> header to clairfy
>>
>> 1) can a window be bound to multiple windows at once?
>
> You can't bind (attach) the same window to multiple windows
> but a window can have multiple windows bound (attached) to it.
> That is because if you bind a window to another, then the bound window
> must "follow" the window to which it's attached when the latter moves to
> a new position.
> It's intutive that a window can't "follow" more than one window.
>
>> 2) if not, what error is returned
>
> None.
> The new Bind() overrides the previous one (i.e. it automatically
> unbounds the window before binding it to the new window).
>
>> 3) if you can't bind to multiple windows, why specify a "unbind"
>> window in the Unbind call?
>
> Because a window might have multiple windows bound (attached) to it.
>> I like the idea a lot, just curious about the execution.
>
> I realize that the documention should be detailed enough to let people
> understand these concepts immediatly, so i have just committed a change
> to the header to clarify these aspects.
>
An example (attached) will clarify things.
--
Regards,
Claudio Ciccani
[EMAIL PROTECTED]
http://directfb.org
http://sf.net/projects/php-directfb
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <directfb.h>
#define DFBCHECK( x... ) {\
DFBResult ret; \
ret = x; \
if (ret) \
DirectFBError( #x, ret ); \
}
int
main( int argc, char **argv )
{
IDirectFB *dfb;
IDirectFBDisplayLayer *layer;
IDirectFBFont *font;
IDirectFBWindow *window1;
IDirectFBWindow *window2;
IDirectFBWindow *window3;
IDirectFBWindow *window4;
IDirectFBSurface *surface;
IDirectFBEventBuffer *buffer;
DFBWindowDescription dsc;
int quit = 0;
DirectFBInit( &argc, &argv );
DirectFBCreate( &dfb );
dfb->GetDisplayLayer( dfb, DLID_PRIMARY, &layer );
dfb->CreateFont( dfb, NULL, NULL, &font );
/* window 1 */
dsc.flags = DWDESC_WIDTH | DWDESC_HEIGHT;
dsc.width = 300;
dsc.height = 300;
layer->CreateWindow( layer, &dsc, &window1 );
window1->GetSurface( window1, &surface );
surface->Clear( surface, 0xff, 0xff, 0xff, 0xff );
surface->SetFont( surface, font );
surface->SetColor( surface, 0x00, 0x00, 0x00, 0xff );
surface->DrawString( surface, "1", -1, 4, 2, DSTF_LEFT | DSTF_TOP );
surface->Flip( surface, NULL, 0 );
surface->Release( surface );
window1->SetOptions( window1, DWOP_SCALE );
window1->SetOpacity( window1, 0xff );
/* window 2 */
dsc.flags = DWDESC_WIDTH | DWDESC_HEIGHT;
dsc.width = 128;
dsc.height = 128;
layer->CreateWindow( layer, &dsc, &window2 );
window2->GetSurface( window2, &surface );
surface->Clear( surface, 0xff, 0x00, 0x00, 0xff );
surface->SetFont( surface, font );
surface->SetColor( surface, 0x00, 0x00, 0x00, 0xff );
surface->DrawString( surface, "2", -1, 4, 2, DSTF_LEFT | DSTF_TOP );
surface->Flip( surface, NULL, 0 );
surface->Release( surface );
window2->PutAtop( window2, window1 );
window2->SetOptions( window2, DWOP_SCALE | DWOP_KEEP_STACKING );
window2->SetOpacity( window2, 0xff );
/* window 3 */
dsc.flags = DWDESC_WIDTH | DWDESC_HEIGHT;
dsc.width = 64;
dsc.height = 64;
layer->CreateWindow( layer, &dsc, &window3 );
window3->GetSurface( window3, &surface );
surface->Clear( surface, 0x00, 0xff, 0xff, 0xff );
surface->SetFont( surface, font );
surface->SetColor( surface, 0x00, 0x00, 0x00, 0xff );
surface->DrawString( surface, "3", -1, 4, 2, DSTF_LEFT | DSTF_TOP );
surface->Flip( surface, NULL, 0 );
surface->Release( surface );
window3->PutAtop( window3, window2 );
window3->SetOptions( window3, DWOP_SCALE | DWOP_KEEP_STACKING );
window3->SetOpacity( window3, 0xff );
/* window 4 */
dsc.flags = DWDESC_WIDTH | DWDESC_HEIGHT;
dsc.width = 64;
dsc.height = 64;
layer->CreateWindow( layer, &dsc, &window4 );
window4->GetSurface( window4, &surface );
surface->Clear( surface, 0xff, 0xff, 0x00, 0xff );
surface->SetFont( surface, font );
surface->SetColor( surface, 0x00, 0x00, 0x00, 0xff );
surface->DrawString( surface, "4", -1, 4, 2, DSTF_LEFT | DSTF_TOP );
surface->Flip( surface, NULL, 0 );
surface->Release( surface );
window4->PutAtop( window4, window2 );
window4->SetOptions( window4, DWOP_SCALE | DWOP_KEEP_STACKING );
window4->SetOpacity( window4, 0xff );
/* bind window 2 to window 1 */
DFBCHECK(window1->Bind( window1, window2, 300, 300 ));
/* bind window 3 to window 2 */
DFBCHECK(window2->Bind( window2, window3, 96, -32 ));
/* bind window 4 to window 2 */
DFBCHECK(window2->Bind( window2, window4, -32, 96 ));
/* try moving window 2 (fails with DFB_UNSUPPORTED) */
//DFBCHECK(window2->MoveTo( window2, 100, 100 ));
window1->CreateEventBuffer( window1, &buffer );
printf( "Press ENTER to bind/unbind window 2\n" );
fflush( stdout );
while (!quit) {
DFBWindowEvent evt;
static int bound = 1;
buffer->WaitForEvent( buffer );
while (buffer->GetEvent( buffer, DFB_EVENT(&evt) ) == DFB_OK) {
switch (evt.type) {
case DWET_KEYDOWN:
if (evt.key_symbol == DIKS_ESCAPE) {
quit = 1;
}
else if (evt.key_symbol == DIKS_ENTER) {
bound = !bound;
if (bound) {
int x1, y1;
int x2, y2;
window1->GetPosition( window1, &x1, &y1 );
window2->GetPosition( window2, &x2, &y2 );
window1->Bind( window1, window2, x2-x1, y2-y1 );
}
else {
window1->Unbind( window1, window2 );
}
}
break;
case DWET_CLOSE:
case DWET_DESTROYED:
quit = 1;
break;
default:
break;
}
}
}
buffer->Release( buffer );
window4->Release( window4 );
window3->Release( window3 );
window2->Release( window2 );
window1->Release( window1 );
font->Release( font );
layer->Release( layer );
dfb->Release( dfb );
return 0;
}
_______________________________________________
directfb-dev mailing list
[email protected]
http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-dev
