New function for List

[TriZet]

Hi again!

I do some device and I was needed functions for select/deselect item. And for scroll to the item in List.

I don't find how it can be do in uGFX. If it can be please say how )) But for now I added this functions.

Maybe some people this functions can help too. Or maybe you add them to uGFX to improve functionality.

//===============================================================
// item - is item to modify
// param - TRUE to select, FALSE to deselect
//
void gwinListSetSelected(GHandle gh, int item, bool_t param) {
	const gfxQueueASyncItem	*	qi;
	int							i;

	// is it a valid handle?
	if (gh->vmt != (gwinVMT *)&listVMT)
		return;

	// watch out for an invalid item
	if (item < 0 || item > (gh2obj->cnt) - 1)
		return;

	// If not a multiselect mode - clear previous selected item
	if (!(gh->flags & GLIST_FLG_MULTISELECT)) {
		for(qi = gfxQueueASyncPeek(&gh2obj->list_head), i = 0; qi; qi = gfxQueueASyncNext(qi), i++) {
			if (qi2li->flags & GLIST_FLG_SELECTED) {
				qi2li->flags &= ~GLIST_FLG_SELECTED;
				break; // or without break to deselect all
			}
		}
	}

	// Find item and set selected or not
	for(qi = gfxQueueASyncPeek(&gh2obj->list_head), i = 0; qi; qi = gfxQueueASyncNext(qi), i++) {
		if (i == item) {
			if(param == TRUE )qi2li->flags |= GLIST_FLG_SELECTED;
			else qi2li->flags &= ~GLIST_FLG_SELECTED;
			break;
		}
	}
	_gwinUpdate(gh);
}

//===============================================================
// item - scrool to him
void gwinListScroollToItem(GHandle gh, int item) {
	int iheight, oldtop;
	// is it a valid handle?
	if (gh->vmt != (gwinVMT *)&listVMT)
		return;

	// watch out for an invalid item
	if (item < 0 || item > (gh2obj->cnt) - 1)
		return;

    iheight = gdispGetFontMetric(gh->font, fontHeight) + VERTICAL_PADDING;
	gh2obj->top = iheight * item;

    if (gh2obj->top >= gh2obj->cnt * iheight - (gh->height-2))
        gh2obj->top = gh2obj->cnt * iheight - (gh->height-2) - 1;

	if (gh2obj->top < 0)
        gh2obj->top = 0;

	_gwinUpdate(gh);
}

//===============================================================

[inmarket]

That will make a very worthwhile addition to the list. I will integrate it into the master.

[TriZet]

Great! If I get new ideas, I will write them on the forum.

Happy to help improve the uGFX

[inmarket]

Now added to the repository (but altered slightly)

[Joel Bodenmann]

Wow, nice job! Keep up the good work!

~ Tectu