project for a (works on my devices) demo

SOURCES/graphics/library/gui_component/gui_component.c

@@ -0,0 +1,87 @@
+#include "gui_component.h"
+#include "listeners/xdg_surface_listener.h"
+
+#include <stdlib.h>
+
+/* 
+	listener to be bound on XDG surfaces
+
+	the only event declared by the xdg_surface is the "configure" one
+	indicates the hint for the client to update the arrangement of surfaces ( i.e. change of resolution )
+*/
+const struct xdg_surface_listener surface_listener = {
+	surface_configure
+};
+
+gui_component_graphics* gui_component_graphics_new(
+	ui_position *pos,
+	ui_dimensions *dim,
+	surface_builders *builders
+){
+	gui_component_graphics *g = malloc( sizeof( gui_component_graphics));
+	g->dimensions = dim;
+	g->position = pos;
+
+	g->surface = wl_compositor_create_surface( builders->compositor);
+	g->xdg_surface = xdg_wm_base_get_xdg_surface( builders->xdg_wm_base, g->surface);
+	xdg_surface_add_listener( g->xdg_surface, &surface_listener, NULL);
+
+	return g;
+}
+
+gui_component* gui_component_new_begin(
+	gui_component *parent,
+	ui_position *pos,
+	ui_dimensions *dim,
+	void (*draw_callback) ( gui_component*, int),
+	void (*resize_callback) ( gui_component*, resize_event*),
+	void (*input_callback) ( gui_component*, resize_event*),
+	surface_builders *builders
+){
+	gui_component* c = malloc( sizeof( gui_component));
+
+	c->specialization = NULL;
+	c->graphics = gui_component_graphics_new( pos, dim, builders);
+	c->draw_callback = draw_callback;
+	
+	if( parent){
+		gui_component_add_child( parent, c);
+	}
+	
+	c->children = gui_components_list_new();
+	return c;
+}
+
+void gui_component_new_end( gui_component* toComplete){
+	/*
+		must be called at the end of the configuration
+	*/
+	wl_surface_commit( toComplete->graphics->surface);
+
+}
+
+
+void gui_component_add_child( gui_component *parent, gui_component *child){
+	/* missing args */
+	if( ! parent || ! child){
+	
+	}
+	
+	/* components cannot be moved around at the moment, plug once and bye */
+	if( child->parent){
+	}
+	
+	child->parent = parent;
+	gui_components_list_add( parent->children, child);
+}
+
+void child_draw( gui_component* child, void *extra){
+	int *casted = (int*) extra;
+	int deltaTime = *casted;
+	gui_component_draw( child, deltaTime);
+}
+
+void gui_component_draw( gui_component *c, int deltaTime){
+	c->draw_callback( c, deltaTime);
+	gui_components_list_foreach( c->children, child_draw, (void*) &deltaTime);
+}