first draft for absolute positioning

lib/ugui.c3l/src/ugui_layout.c3

@@ -31,8 +31,12 @@ struct Layout {
 	struct origin {
 		short x, y;
 	}
-	LayoutDirection dir;
+	// false: the element is laid out according to the parent
-	Anchor anchor;
+	// true: the element is laid out separate from all other children and the relative position to
+	//       the parent is the .origin field
+	bool absolute;
+	LayoutDirection dir; // the direction the children are laid out
+	Anchor anchor;       // how the children are positioned
 	Rect content_offset; // combined effect of margin, border and padding
 }
 
@@ -112,6 +116,9 @@ fn void update_parent_size(Elem* child, Elem* parent)
 	Layout* cl = &child.layout;
 	Layout* pl = &parent.layout;
 
+	// if the element has absolute position do not update the parent
+	if (cl.absolute) return;
+
 	Point child_size = cl.get_dimensions();
 
 	switch (pl.dir) {
@@ -163,6 +170,9 @@ fn void resolve_dimensions(Elem* e, Elem* p)
 	Point elem_dimensions = el.get_dimensions();
 	e.bounds.w = elem_dimensions.x;
 	e.bounds.h = elem_dimensions.y;
+	
+	// if the element has absolute position do not update the parent
+	if (el.absolute) return;
 
 	switch (pl.dir) {
 	case ROW:
@@ -209,6 +219,13 @@ fn void resolve_placement(Elem* c, Elem* p)
 		.y = p.bounds.y + pl.origin.y + pl.content_offset.y,
 	};
 
+	// if the element has absolute position assign the origin and do not update the parent
+	if (cl.absolute) {
+		c.bounds.x = p.bounds.x + pl.content_offset.x + cl.origin.x;
+		c.bounds.y = p.bounds.x + pl.content_offset.x + cl.origin.y;
+		return;
+	}
+
 	switch (pl.anchor) {
 	case TOP_LEFT:
 		c.bounds.x = off.x;

lib/ugui.c3l/src/widgets/ugui_div.c3

@@ -25,12 +25,13 @@ macro Ctx.@div(&ctx,
                Size width = @grow, Size height = @grow,
                LayoutDirection dir = ROW,
                Anchor anchor = TOP_LEFT,
+               bool absolute = false, Point off = {},
                bool scroll_x = false, bool scroll_y = false,
                ...;
                @body()
               )
 {
-	ctx.div_begin(width, height, dir, anchor, scroll_x, scroll_y, $vasplat)!;
+	ctx.div_begin(width, height, dir, anchor, absolute, off, scroll_x, scroll_y, $vasplat)!;
 	@body();
 	return ctx.div_end()!;
 }
@@ -39,11 +40,12 @@ macro Ctx.div_begin(&ctx,
                     Size width = @grow(), Size height = @grow(),
                     LayoutDirection dir = ROW,
                     Anchor anchor = TOP_LEFT,
+                    bool absolute = false, Point off = {}, 
                     bool scroll_x = false, bool scroll_y = false,
                     ...
                    )
 {
-	return ctx.div_begin_id(@compute_id($vasplat), width, height, dir, anchor, scroll_x, scroll_y);
+	return ctx.div_begin_id(@compute_id($vasplat), width, height, dir, anchor, absolute, off, scroll_x, scroll_y);
 }
 
 fn void? Ctx.div_begin_id(&ctx,
@@ -51,6 +53,7 @@ fn void? Ctx.div_begin_id(&ctx,
                           Size width, Size height,
                           LayoutDirection dir,
                           Anchor anchor,
+                          bool absolute, Point off,
                           bool scroll_x, bool scroll_y
                          )
 {
@@ -75,7 +78,12 @@ fn void? Ctx.div_begin_id(&ctx,
 		.dir = dir,
 		.anchor = anchor,
 		.content_offset = style.margin + style.border + style.padding,
+		.absolute = absolute,
 	};
+	if (absolute) {
+		elem.layout.origin.x = off.x;
+		elem.layout.origin.y = off.y;
+	}
 
 	ctx.push_rect(elem.bounds.pad(style.margin), elem.div.z_index, style)!;
 

src/main.c3

@@ -216,15 +216,10 @@ $endswitch
 		TimeStats dts = draw_times.get_stats();
 		TimeStats uts = ui_times.get_stats();
 
-/*
+		ui.@div(ugui::@fit(), ugui::@fit(), COLUMN, TOP_LEFT, true) {
-		ui.layout_set_floating()!!;
+			ui.text(string::tformat("frame %d, fps = %.2f", frame, fps))!!;
-		ui.@div({0, ui.height-150, -300, 150}) {
+			ui.text(string::tformat("ui avg: %s\ndraw avg: %s\nTOT: %s", uts.avg, dts.avg, uts.avg+dts.avg))!!;
-			ui.layout_set_column()!!;
-			ui.text_unbounded(string::tformat("frame %d, fps = %.2f", frame, fps))!!;
-			ui.text_unbounded(string::tformat("ui avg: %s\ndraw avg: %s\nTOT: %s", uts.avg, dts.avg, uts.avg+dts.avg))!!;
-			ui.text_unbounded(string::tformat("%s %s", mod.lctrl, (String)ui.input.keyboard.text[:ui.input.keyboard.text_len]))!!;
 		}!!;
-*/
 
 		ui.frame_end()!!;
 		/* End UI Handling */