form.c

一个用于智能手机的多媒体库适合S60 WinCE的跨平台开发库

	}
#endif


exit:
	group_reset_children((GroupingNode*)st);
	if (eff->traversing_mode==TRAVERSE_GET_BOUNDS) gf_bbox_from_rect(&eff->bbox, &st->clip);
	form_reset(st);
}

void R3D_InitForm(Render3D *sr, GF_Node *node)
{
	FormStack *stack;
	GF_SAFEALLOC(stack, FormStack);

	SetupGroupingNode((GroupingNode*)stack, sr->compositor, node, & ((M_Form *)node)->children);
	stack->grouplist = gf_list_new();

	gf_node_set_private(node, stack);
	gf_node_set_callback_function(node, RenderForm);
}


/*
			FORM CONSTRAINTS
*/


static void shin_apply(FormStack *st, u32 *group_idx, u32 count)
{
	u32 i, len;
	Fixed tot_len, inter_space;
	tot_len = 0;
	inter_space = st->clip.width;

	len = 0;
	for (i=0; i<count; i++) {
		if (group_idx[i] != 0) {
			tot_len += form_get_group(st, group_idx[i])->final.width;
			len++;
		}
	}
	inter_space -= tot_len;
	inter_space /= (len+1);

	for (i=0; i<count; i++) {
		if(group_idx[i] == 0) continue;
		if (!i) {
			form_get_group(st, group_idx[0])->final.x = st->clip.x + inter_space;
		} else {
			form_get_group(st, group_idx[i])->final.x = 
				form_get_group(st, group_idx[i-1])->final.x + form_get_group(st, group_idx[i-1])->final.width 
				+ inter_space;
		}
		fg_update_bounds(form_get_group(st, group_idx[i]));
	}
}

static void sh_apply(FormStack *st, Fixed space, u32 *group_idx, u32 count)
{
	u32 i, k;
	GF_Rect *l, *r;
	Fixed inter_space, tot_len;

	tot_len = 0;
	if (space == -FIX_ONE) {
		r = &form_get_group(st, group_idx[count-1])->final;
		l = &form_get_group(st, group_idx[0])->final;
		inter_space = r->x - l->x;
		if(group_idx[0] != 0) inter_space -= l->width;
		for (i=1; i<count-1; i++) tot_len += form_get_group(st, group_idx[i])->final.width;
		inter_space -= tot_len;
		inter_space /= (count-1);
	} else {
		inter_space = space;
	}	
	
	k = count - 1;
	if (space != -1) k += 1;
	for (i=1; i<k; i++) {
		if (group_idx[i] ==0) continue;
		l = &form_get_group(st, group_idx[i-1])->final;
		r = &form_get_group(st, group_idx[i])->final;
		r->x = l->x + inter_space;
		if(group_idx[i-1] != 0) r->x += l->width;
		fg_update_bounds(form_get_group(st, group_idx[i]));
	}
}

static void svin_apply(FormStack *st, u32 *group_idx, u32 count)
{
	u32 i, len;
	Fixed tot_len, inter_space;
	tot_len = 0;
	inter_space = st->clip.height;
	len = 0;
	for (i=0; i<count;i++) {
		if (group_idx[i] != 0) {
			tot_len += form_get_group(st, group_idx[i])->final.height;
			len++;
		}
	}
	inter_space -= tot_len;
	inter_space /= (len+1);
				
	for (i=0; i<count; i++) {
		if (group_idx[i] == 0) continue;
		if (!i) {
			form_get_group(st, group_idx[0])->final.y = st->clip.y - inter_space;
		} else {
			form_get_group(st, group_idx[i])->final.y =
				form_get_group(st, group_idx[i-1])->final.y - form_get_group(st, group_idx[i-1])->final.height -
				inter_space;				
		}
		fg_update_bounds(form_get_group(st, group_idx[i]));
	}
}

static void sv_apply(FormStack *st, Fixed space, u32 *group_idx, u32 count)
{
	u32 i, k;
	Fixed tot_len, inter_space;
	GF_Rect *t, *b;

	tot_len = 0;
	if(space > -FIX_ONE) {
		inter_space = space;
	} else {
		t = &form_get_group(st, group_idx[count-1])->final;
		b = &form_get_group(st, group_idx[0])->final;
		inter_space = b->y - t->y;
		if (group_idx[0]!=0) inter_space -= t->height;
		for (i=1; i<count-1; i++) tot_len += form_get_group(st, group_idx[i])->final.height;
		inter_space -= tot_len;
		inter_space /= count-1;
	}	
	
	k = count-1;
	if (space > -1) k += 1;
	for (i=1; i<k; i++) {
		if (group_idx[i] == 0) continue;
		form_get_group(st, group_idx[i])->final.y = form_get_group(st, group_idx[i-1])->final.y - inter_space;
		if (group_idx[i-1] != 0) {
			form_get_group(st, group_idx[i])->final.y -= form_get_group(st, group_idx[i-1])->final.height;
		}
		fg_update_bounds(form_get_group(st, group_idx[i]));
	}
}

static void al_apply(FormStack *st, Fixed space, u32 *group_idx, u32 count)
{
	Fixed min_x;
	GF_Rect *rc;
	u32 i, start;

	start = 0;
	min_x = form_get_group(st, group_idx[0])->final.x;
	if (space>-FIX_ONE) {
		start = 1;
		min_x += space;
	} else {
		for (i=1; i<count; i++) {
			rc = &form_get_group(st, group_idx[0])->final;
			if (group_idx[i]==0) {
				min_x = rc->x;
				break;
			}
			if (rc->x < min_x) min_x = rc->x;
		}
	}
	for (i=start; i<count; i++) {
		if( group_idx[i] == 0) continue;
		form_get_group(st, group_idx[i])->final.x = min_x;
		fg_update_bounds(form_get_group(st, group_idx[i]));
	}
}

static void ar_apply(FormStack *st, Fixed space, u32 *group_idx, u32 count)
{
	Fixed max_x;
	u32 i, start;
	GF_Rect *rc;

	start = 0;
	rc = &form_get_group(st, group_idx[0])->final;
	max_x = rc->x + rc->width;
	
	if(space>-FIX_ONE) {
		max_x -= space;
		start = 1;
	} else {
		for (i=1; i<count; i++) {
			rc = &form_get_group(st, group_idx[i])->final;
			if (group_idx[i]==0) {
				max_x = rc->x + rc->width;
				break;
			}
			if (rc->x + rc->width > max_x) max_x = rc->x + rc->width;
		}
	}
	for (i=start; i<count; i++) {
		if(group_idx[i] == 0) continue;
		rc = &form_get_group(st, group_idx[i])->final;
		rc->x = max_x - rc->width;
		fg_update_bounds(form_get_group(st, group_idx[i]));
	}
}

static void at_apply(FormStack *st, Fixed space, u32 *group_idx, u32 count)
{
	Fixed max_y;
	u32 i, start;
	GF_Rect *rc;

	start = 0;
	max_y = form_get_group(st, group_idx[0])->final.y;
	if(space>-FIX_ONE) {
		start = 1;
		max_y -= space;
	} else {
		for (i=1; i<count; i++) {
			rc = &form_get_group(st, group_idx[i])->final;
			if (group_idx[i]==0) {
				max_y = rc->y;
				break;
			}
			if (rc->y > max_y) max_y = rc->y;
		}
	}

	for (i=start; i<count; i++) {
		if(group_idx[i] == 0) continue;
		form_get_group(st, group_idx[i])->final.y = max_y;
		fg_update_bounds(form_get_group(st, group_idx[i]));
	}
}

static void ab_apply(FormStack *st, Fixed space, u32 *group_idx, u32 count)
{
	Fixed min_y;
	u32 i, start;
	GF_Rect *rc;

	start = 0;
	rc = &form_get_group(st, group_idx[0])->final;
	min_y = rc->y - rc->height;
	if(space>-FIX_ONE) {
		start = 1;
		min_y += space;
	} else {
		for (i=1; i<count; i++) {
			rc = &form_get_group(st, group_idx[i])->final;
			if (group_idx[i]==0) {
				min_y = rc->y - rc->height;
				break;
			}
			if (rc->y - rc->height < min_y) min_y = rc->y - rc->height;
		}
	}
	for (i=start; i<count; i++) {
		if(group_idx[i] == 0) continue;
		rc = &form_get_group(st, group_idx[i])->final;
		rc->y = min_y + rc->height;
		fg_update_bounds(form_get_group(st, group_idx[i]));
	}
}

static void ah_apply(FormStack *st, u32 *group_idx, u32 count)
{
	GF_Rect *rc;
	u32 i;
	Fixed left, right, center;
	left = right = center = 0;

	for (i=0; i<count; i++) {
		rc = &form_get_group(st, group_idx[i])->final;
		if(group_idx[i] == 0) {
			center = rc->x + rc->width / 2;
			break;
		}
		if (left > rc->x) left = rc->x;
		if (right < rc->x + rc->width) right = rc->x + rc->width;
		center = (left+right)/2;
	}

	for (i=0; i<count; i++) {
		if(group_idx[i] == 0) continue;
		rc = &form_get_group(st, group_idx[i])->final;
		rc->x = center - rc->width/2;
		fg_update_bounds(form_get_group(st, group_idx[i]));
	}
}

static void av_apply(FormStack *st, u32 *group_idx, u32 count)
{
	u32 i;
	Fixed top, bottom, center;
	GF_Rect *rc;
	top = bottom = center = 0;

	for (i=0; i<count; i++) {
		rc = &form_get_group(st, group_idx[i])->final;
		if (group_idx[i] == 0) {
			center = rc->y - rc->height / 2;
			break;
		}
		if (top < rc->y) top = rc->y;
		if (bottom > rc->y - rc->height) bottom = rc->y - rc->height;
		center = (top+bottom)/2;
	}

	for (i=0; i<count; i++) {
		if(group_idx[i] == 0) continue;
		rc = &form_get_group(st, group_idx[i])->final;
		rc->y = center + rc->height/2;
		fg_update_bounds(form_get_group(st, group_idx[i]));
	}
}