if (!gad) {
        DEBUG("Failed to create Tags gadget");
    }
    if (!gad) goto cleanup;

if (!gad) {
        DEBUG("Failed to create Tags gadget");
       goto cleanup;
    }

while ((msg = GT_GetIMsg(window->UserPort))) {
switch(msg->Class) {
...
   }
    GT_ReplyIMsg(msg);
}

while ((msg = GT_GetIMsg(window->UserPort))) {
ULONG class = msg->Class; 
GT_ReplyIMsg(msg);
switch(class) {
...
   }
}

Po mojemu zle tworzysz te gadzety.
Powinienes kolejny gadzet podpinac pod poprzedni tak aby towrzyla sie lista.

UBYTE 	GUI_INTUITION_Create(void)
{
	// get some helpers to create more compact window
	ULONG	font_width = STARTER_pubscreen->RastPort.TxWidth;
	ULONG	font_height = STARTER_pubscreen->RastPort.TxHeight;

	// *****************************************************************
	// GADGETS setup
	// *****************************************************************

		struct Gadget*		g_context = CreateContext(&G_gadgets[GID_GADGETS_LIST]);
	 	struct NewGadget 	ng;

		// For all gadgets.
		ng.ng_TextAttr   = STARTER_pubscreen->Font;
		ng.ng_VisualInfo = STARTER_visual_info;

		// -- LEFT COLUMN --

			// create text
			ng.ng_LeftEdge   = 10;
			ng.ng_TopEdge    = font_height + 8;
			ng.ng_Width      = font_width * 17;
			ng.ng_Height     = font_height;
			ng.ng_Flags      = 0;

			g_context = CreateGadget(	TEXT_KIND, g_context, &ng, 
										GTTX_Text, (ULONG)"Display mode:", 
										TAG_END);

			// Create cycle/chooser
			ng.ng_LeftEdge   = 10;
			ng.ng_TopEdge    = font_height + 8 + font_height + 2;
			ng.ng_Width      = font_width * 22;
			ng.ng_Height     = font_height + 10;
			ng.ng_GadgetID   = GID_MODE_CHOOSER;
			ng.ng_Flags      = 0;

			G_gadgets[GID_MODE_CHOOSER] = g_context = CreateGadget(	CYCLE_KIND, g_context, &ng, 
																	GTCY_Labels, (ULONG)G_mode_strings, 
																	GTCY_Active, (ULONG)G_mode_selection,
																	TAG_END);


			// create text
			ng.ng_LeftEdge   = 10;
			ng.ng_TopEdge    = font_height + 8 + font_height + 2 + font_height + 15;
			ng.ng_Width      = font_width * 17;
			ng.ng_Height     = font_height;
			ng.ng_Flags      = 0;

			g_context = CreateGadget(	TEXT_KIND, g_context, &ng, 
										GTTX_Text, (ULONG)"Screen aspect:", 
										TAG_END);

			// Create cycle/chooser
			ng.ng_LeftEdge   = 10;
			ng.ng_TopEdge    = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2;
			ng.ng_Width      = font_width * 22;
			ng.ng_Height     = font_height + 10;
			ng.ng_GadgetID   = GID_ASPECT_CHOOSER;
			ng.ng_Flags      = 0;

			G_gadgets[GID_ASPECT_CHOOSER] = g_context = CreateGadget(	CYCLE_KIND, g_context, &ng, 
																		GTCY_Labels, (ULONG)G_aspect_fullscreen_strings, 
																		GTCY_Active, (ULONG)0,
																		TAG_END);


			// create text
			ng.ng_LeftEdge   = 10;
			ng.ng_TopEdge    = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15;
			ng.ng_Width      = font_width * 17;
			ng.ng_Height     = font_height;
			ng.ng_Flags      = 0;

			g_context = CreateGadget(	TEXT_KIND, g_context, &ng, 
										GTTX_Text, (ULONG)"Pixel format:", 
										TAG_END);

			// Create cycle/chooser
			ng.ng_LeftEdge   = 10;
			ng.ng_TopEdge    = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + 2;
			ng.ng_Width      = font_width * 22;
			ng.ng_Height     = font_height + 10;
			ng.ng_GadgetText = NULL;
			ng.ng_GadgetID   = GID_PIXEL_CHOOSER;
			ng.ng_Flags      = 0;

			G_gadgets[GID_PIXEL_CHOOSER] = g_context = CreateGadget(	CYCLE_KIND, g_context, &ng, 
																		GTCY_Labels, (ULONG)G_pixel_strings, 
																		GTCY_Active, (ULONG)G_pixel_selection,
																		TAG_END);


			// create text
			ng.ng_LeftEdge   = 10;
			ng.ng_TopEdge    = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15;
			ng.ng_Width      = font_width * 17;
			ng.ng_Height     = font_height;
			ng.ng_GadgetText = NULL;
			ng.ng_Flags      = 0;

			g_context = CreateGadget(	TEXT_KIND, g_context, &ng, 
										GTTX_Text, (ULONG)"Screen buffering:", 
										TAG_END);

			// Create cycle/chooser
			ng.ng_LeftEdge   = 10;
			ng.ng_TopEdge    = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + 2;
			ng.ng_Width      = font_width * 22;
			ng.ng_Height     = font_height + 10;
			ng.ng_GadgetText = NULL;
			ng.ng_GadgetID   = GID_BUFFER_CHOOSER;
			ng.ng_Flags      = 0;

			G_gadgets[GID_BUFFER_CHOOSER] = g_context = CreateGadget(	CYCLE_KIND, g_context, &ng, 
																		GTCY_Labels, (ULONG)G_buffering_strings_3, 
																		GTCY_Active, (ULONG)2,
																		TAG_END);

		// -- RIGHT COLUMN --

			// create text
			ng.ng_LeftEdge   = 10 + font_width * 22 + 10;
			ng.ng_TopEdge    = font_height + 8;
			ng.ng_Width      = font_width * 17;
			ng.ng_Height     = font_height;
			ng.ng_GadgetText = NULL;
			ng.ng_Flags      = 0;

			g_context = CreateGadget(	TEXT_KIND, g_context, &ng, 
										GTTX_Text, (ULONG)"Screen size:", 
										TAG_END);


			// Create list view for screen modes.
			ng.ng_LeftEdge   = 10 + font_width * 22 + 10;
			ng.ng_TopEdge    = font_height + 8 + font_height + 2;
			ng.ng_Width      = font_width * 24;
			ng.ng_Height     = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + 8;
			ng.ng_GadgetText = NULL;
			ng.ng_GadgetID   = GID_SCREEN_LIST;
			ng.ng_Flags      = 0;

			G_gadgets[GID_SCREEN_LIST] = g_context = CreateGadget (	LISTVIEW_KIND, g_context, &ng, 
														GTLV_ShowSelected, 0,
														GTLV_Selected, 0,
														GTLV_Labels, (ULONG)&G_screen_list,
														TAG_END);

		// -- BOTTOM ROW --
	
			ULONG bottom_row_top_edge = font_height + 8 + font_height + 2 + font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + (font_height / 2);

			// Create help button.
			ng.ng_LeftEdge   = 10;
			ng.ng_TopEdge    = bottom_row_top_edge;
			ng.ng_Width      = font_width * 14;
			ng.ng_Height     = font_height + 12;
			ng.ng_GadgetText = (STRPTR)"HELP";
			ng.ng_GadgetID   = GID_HELP_BUTTON;
			ng.ng_Flags      = 0;

			G_gadgets[GID_HELP_BUTTON] = g_context = CreateGadget(BUTTON_KIND, g_context, &ng, TAG_END);

			// Create start button.
			ng.ng_LeftEdge   = 10 + font_width * 14 + 10;
			ng.ng_TopEdge    = bottom_row_top_edge;
			ng.ng_Width      = font_width * 32;
			ng.ng_Height     = font_height + 12;
			ng.ng_GadgetText = (STRPTR)"START RAYCASTER";
			ng.ng_GadgetID   = GID_START_BUTTON;
			ng.ng_Flags      = 0;

			G_gadgets[GID_START_BUTTON] = g_context = CreateGadget(BUTTON_KIND, g_context, &ng, TAG_END);


	// ***********************************************************************

	ULONG window_width	= 15 + font_width * 22 + font_width * 24 + 15;
	ULONG window_height = bottom_row_top_edge + font_height + 12 + 5;

	ULONG 	window_pos_x = (STARTER_pubscreen->Width / 2) - (window_width / 2);
	ULONG	window_pos_y = (STARTER_pubscreen->Height / 2) - (window_height / 2);

 	// --- Create window ---
    STARTER_window = OpenWindowTags(NULL, 
	 								WA_Left, window_pos_x, 
									WA_Top, window_pos_y, 
									WA_Width, window_width, 
									WA_Height, window_height, 
									WA_Title, (ULONG)STARTER_WINDOW_NAME, 
									WA_Flags, WFLG_DRAGBAR | WFLG_DEPTHGADGET | WFLG_CLOSEGADGET | WFLG_ACTIVATE, 
									WA_IDCMP, IDCMP_CLOSEWINDOW | IDCMP_REFRESHWINDOW | BUTTONIDCMP | LISTVIEWIDCMP | IDCMP_GADGETDOWN | IDCMP_GADGETUP,
									WA_Gadgets, (ULONG)G_gadgets[GID_GADGETS_LIST],
									TAG_END);

	// must be refreshed after creation - GT - for gaddets
	GT_RefreshWindow(STARTER_window, NULL);

	if (!STARTER_window) 	return 0;
	else 					return 1;

ng.ng_TopEdge = font_height + 8;
..
ng.ng_TopEdge = font_height + 8 + font_height + 2;
..
ng.ng_TopEdge = font_height + 8 + font_height + 2 + font_height + 15;
..
ng.ng_TopEdge = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2;
..
ng.ng_TopEdge = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15;
..
ng.ng_TopEdge = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + 2;
..
ng.ng_TopEdge = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15;
..
ng.ng_TopEdge = font_height + 8 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + 2 + font_height + 15 + font_height + 2;
...

ng.ng_TopEdge = font_height + 8;
..
ng.ng_TopEdge += font_height + 2;
..
ng.ng_TopEdge += font_height + 15;
..
ng.ng_TopEdge += font_height + 2;
..
ng.ng_TopEdge += font_height + 15;
..
ng.ng_TopEdge += font_height + 2;
..
ng.ng_TopEdge += font_height + 15;
..
ng.ng_TopEdge += font_height + 2;
...

• Co do formatu strumienia, nie widziałem w API niczego poza OGG, AAC, AAC+ i MP3, więc zrobiłem to na stałe. FLAC jest dostępny, ale znalazłem tylko dwie stacje.
• W kwestii DAPlayera, pewnie nie będzie z tym problemu. Jedyne co robie to wysyłam komendę OPEN przez AREXX. Ponieważ autorem DAPlayera jest także Thomas, podejrzewam, że obsługuje komendę OPEN z parametrem. Mogę dodać w ustawieniach opcję do przełączania silników. Pisałem to bardziej pod siebie, nie myśląc za bardzo o szerszym gronie użytkowników, ponieważ mam AmiBlaster i używam AmigaAMP z mhi, więc MP3 czy FLAC działają bez problemu w AmigaAMP.
• Co do pustych gadżetów – gdy lista wskazuje na pusty element, input z danego gadżetu jest ignorowany, więc wyświetla wszystko.
• O limicie 100. Tak, wiem, zrobiłem to ze względu, ze wyszukiwanie stacji przy 68020 zajmowało trochę czasu, dlatego ustawiłem maksymalnie na 100 wyników. Mogę dodać opcję w ustawieniach, aby to zmienić.
• Jeśli chodzi o MUI, to może zmienię to za jakiś czas, bo trochę przesadziłem z liczbą okien i innych elementów. Myślę, że idealnym rozwiązaniem byłoby jedno okno, gdzie szczegóły mógłbym wyświetlić na dole strony.

Szkoda, ze nie mam ze soba maszyny z morphosem to bym zobaczył w czym jest problem.