GadTools ListView questions.

[Thorham]

How do I get messages from a GadTools listview scroll bar and arrow keys? I have working code that allows selecting listview items with the cursor keys, but I can't get the scroll bar and arrow keys to send any messages.

[Daedalus]

I don't think the Listview gadget passes those messages on, but first make sure your window has WFLG_REPORTMOUSE set and you're looking for IDCMP_MOUSEMOVE and IDCMP_INTUITICKS as these are needed for reading scrollbars. If that doesn't pass the messages through to your window, perhaps you just need to poll the Listview every time you get an Intuiticks message and see what the GTLV_Top value is. Not ideal but it should work.

[Thorham]

Originally Posted by Daedalus

I don't think the Listview gadget passes those messages on

I think you may be right.

Originally Posted by Daedalus

If that doesn't pass the messages through to your window, perhaps you just need to poll the Listview every time you get an Intuiticks message and see what the GTLV_Top value is. Not ideal but it should work.

I was afraid I'd have to do something like that.

Thanks

[Thorham]

Anyone else have any ideas?

[Thorham]

Solved it. You can just calculate the top item from the selected item and the mouse position.

[thomas]

Why don't you use the GTLV_Top attribute?

[Thorham]

Originally Posted by thomas

Why don't you use the GTLV_Top attribute?

Because I didn't find a way to read it (just did: GT_GetGadgetAttrs). It's not in the AOS2.x documentation (which is why I didn't find it at first), because it's 3.x, and since it's 3.x only, I'm not using it. This stuff should just work on 2.x too.

[bubbob42]

Hm, it's your decision, but nowadays ppl seem to have either 3.x or 1.3. Except for some A600s with soldered kick 2.x.

[Thorham]

Originally Posted by bubbob42

Hm, it's your decision, but nowadays ppl seem to have either 3.x or 1.3. Except for some A600s with soldered kick 2.x.

While that's probably true, I see no reason to make this thing not work under 2.x, especially since it's written for use with FrexxEd, which is 2.x compatible.

[mateusz_s]

Originally Posted by thomas

Why don't you use the GTLV_Top attribute?

Another LISTVIEW GADGET question. I have created listview and filled it with some data.. but I can't select anything or even scroll, the scroll bar works itself, but not scrolling the content..

I noticed that listview getting the messages, for example I can close the application if I click on the listview.. here is my code:

Also I spent a lot of time, because nothis was showing in the listview, until I refreshed the window after creation..

int  APP_Init_Window()
{
	if (!(APP_pubscreen = LockPubScreen(NULL))) 
		return 0;

	APP_visual_info = GetVisualInfo(APP_pubscreen, TAG_DONE);

	// get some helpers to create more compact window
	ULONG	font_width = APP_pubscreen->RastPort.TxWidth;;
	ULONG	font_height = APP_pubscreen->RastPort.TxHeight;

	ULONG 	win_pos_x = APP_pubscreen->Width / 2 - 320 / 2;
	ULONG	win_pos_y = APP_pubscreen->Height / 2 - 240 / 2;

	struct Gadget*	    g_context;
	struct Gadget*	g_list_modes;

	g_context = CreateContext (&APP_g_list);


struct List *DaList; 

char *BassSpaces[] = {"Grass", "Eat", "Cows", "All", "Grass", "Eat", "Cows", "All", "Grass", "Eat", "Cows", "All", "Grass", "Eat", "Cows", "All", NULL};  

 struct Node *DaListNode;

  if (DaList = AllocMem (sizeof (struct List), MEMF_FAST))
  {
    NewList (DaList);

    for (int i = 0; BassSpaces[i] != NULL; i++)
    {
      if (DaListNode = AllocMem(sizeof(struct Node), MEMF_FAST) )
      {
        DaListNode->ln_Name = BassSpaces[i];
        DaListNode->ln_Type = 100L;
        DaListNode->ln_Pri = 0;
        AddTail (DaList, DaListNode);
      }
      else
      {
        printf ("Could not allocate memory for node\n");

      }
    }
  }
  else
  {
    printf ("Could not allocate memory for list\n");

  }

  	struct NewGadget ng;

	ng.ng_TextAttr   = APP_pubscreen->Font;
    ng.ng_VisualInfo = APP_visual_info;
	ng.ng_LeftEdge   = 10;
	ng.ng_TopEdge    = font_height + 30;
    ng.ng_Width      = 300;
    ng.ng_Height     = 150;
    ng.ng_GadgetText = (STRPTR)"Please select your screen resolution...";
    ng.ng_GadgetID   = G_ID_LIST_MODES;
    ng.ng_Flags      = 0;


    g_list_modes = g_context = CreateGadget (LISTVIEW_KIND, g_context, &ng, 
                                    GTLV_ShowSelected, NULL,
                                    GTLV_Selected, 0,
                                    GTLV_MakeVisible, 0,
                                    GTLV_Labels, DaList,
                                    TAG_END);


     // --- create window ---
     APP_window = OpenWindowTags(	NULL, 
	 								WA_Left, win_pos_x, 
									WA_Top, win_pos_y, 
									WA_Width, 320, 
									WA_Height, 240, 
									WA_Title, (ULONG)"Raycaster Launcher v01", 
									WA_SmartRefresh, TRUE,
									WA_Flags, WFLG_CLOSEGADGET | WFLG_DRAGBAR | WFLG_ACTIVATE, 
									WA_IDCMP, IDCMP_CLOSEWINDOW | IDCMP_REFRESHWINDOW | BUTTONIDCMP | LISTVIEWIDCMP | IDCMP_GADGETDOWN | IDCMP_GADGETHELP | IDCMP_GADGETUP,
									WA_PubScreen, (ULONG)APP_pubscreen,
									WA_Gadgets, (ULONG)APP_g_list,
									TAG_END);


GT_RefreshWindow (APP_window, NULL);   <<<< WITHOUT THIS NOTHING APPEARS IN LISTVIEW


	// signals for event and messages
 	APP_signals = 1L << APP_window->UserPort->mp_SigBit;

    return 1;
}

void APP_Message_Loop()
{
	BOOL is_loop = TRUE;

	while(is_loop)
	{
		if(SetSignal(0L, APP_signals) & APP_signals)
		{
			struct IntuiMessage* imsg;
			while( imsg = (struct IntuiMessage *)GetMsg(APP_window->UserPort) )
			{
				switch (imsg->Class)
				{
					case IDCMP_REFRESHWINDOW:
						GT_BeginRefresh (APP_window);
						GT_EndRefresh (APP_window, TRUE);
					break;

					case IDCMP_CLOSEWINDOW:
						is_loop = FALSE;
						break;

					case IDCMP_GADGETUP:
					{
						struct Gadget *tmp_gadget = (struct Gadget *) imsg->IAddress;
						switch (tmp_gadget->GadgetID)
						{
							case G_ID_BUTTON_START:
							is_loop = FALSE;
							break;

							case G_ID_LIST_MODES:
							break;
						}
					}
					break;
				}

				ReplyMsg((struct Message *)imsg);
			}
		}
	}
}

[thomas]

You have to use GT_GetIMsg instead of GetMsg and GT_ReplyIMsg instead of ReplyMsg in your message loop.

And somewhere im your program you should have a Wait(), otherwise your program is unsuitable for a multitasking environment. Once you use Wait() you can no longer use SetSignal. You have to use the return value of Wait() instead.

[mateusz_s]

Originally Posted by thomas

You have to use GT_GetIMsg instead of GetMsg and GT_ReplyIMsg instead of ReplyMsg in your message loop.

And somewhere im your program you should have a Wait(), otherwise your program is unsuitable for a multitasking environment. Once you use Wait() you can no longer use SetSignal. You have to use the return value of Wait() instead.

Thank You very much for help @thomas !