tooltip feature

build_dbg.bat

@@ -0,0 +1,3 @@
+@echo off
+call win\setup_cl_generic.bat amd64
+cmake --build build && build\eco2d

code/foundation/src/dev/debug_ui_tools.c

@@ -3,6 +3,8 @@
 #include "world/blocks.h"
 #include "models/items.h"
 
+extern void tooltip_show(const char* name, float xpos, float ypos);
+
 void ToolAssetInspector(void) {
 	if (nk_begin(dev_ui, "Asset Inspector", nk_rect(400, 100, 240, 800),
 	                                 NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE| NK_WINDOW_TITLE))
@@ -16,6 +18,11 @@ void ToolAssetInspector(void) {
 					nk_labelf(dev_ui, NK_TEXT_LEFT, "kind: %s", asset_kind_name);
 					nk_labelf(dev_ui, NK_TEXT_LEFT, "spawnable entity: %s", entity_spawn_provided(i) ? "true" : "false");
 
+					if (nk_button_label(dev_ui, "show tooltip")) {
+						Vector2 mpos = GetMousePosition();
+						tooltip_show(asset_names[i] , mpos.x + 5, mpos.y + 5);
+					}
+
 					// draw block
 					block_id blk_id = blocks_find(i);
 					if (blk_id != 0xF) {

code/foundation/src/gui/inventory.c

@@ -95,8 +95,8 @@ inv_draw_result inventory_draw_crafting_btn(float xpos, float ypos, const char *
 		recipe rp = craft_get_recipe_data(craft_get_recipe_id_from_product(id));
 		int num_reagents = 0;
 		for (int i = 0; rp.reagents[i].id; i++) num_reagents++;
-		if (nk_begin(game_ui , name, nk_rect(mpos.x+15, mpos.y+15, name_width+5, 30+30*(float)num_reagents),
+		if (nk_begin(game_ui , name, nk_rect(mpos.x+15, mpos.y+15, name_width+5, 600),
-		             NK_WINDOW_BORDER | NK_WINDOW_NO_INPUT | NK_WINDOW_NO_SCROLLBAR)) {
+		             NK_WINDOW_BORDER | NK_WINDOW_NO_INPUT | NK_WINDOW_NO_SCROLLBAR | NK_WINDOW_DYNAMIC)) {
 			if (nk_tree_push_id(game_ui, NK_TREE_NODE, "Reagents", NK_MAXIMIZED, id)) {
 				for (asset_id i = 0; rp.reagents[i].id; i++) {
 					nk_label(game_ui, asset_names[rp.reagents[i].id], NK_TEXT_LEFT);

code/foundation/src/gui/tooltip.c

@@ -0,0 +1,170 @@
+// Tooltip system with multilevel modal support
+
+typedef struct _tooltip {
+	const char *name;
+	const char *content;
+	const char **links;
+} tooltip;
+
+static tooltip *tooltips = 0;
+
+//~ registration
+
+void tooltip_register(tooltip desc) {
+	if (!tooltips) {
+		zpl_array_init(tooltips, zpl_heap());
+	}
+
+	desc.links = 0;
+	zpl_array_append(tooltips, desc);
+}
+
+void tooltip_destroy_all(void) {
+	if (!tooltips) return;
+
+	for (zpl_isize i = 0; i < zpl_array_count(tooltips); ++i) {
+		tooltip *tp = (tooltips + i);
+
+		if (tp->links) {
+			zpl_array_free(tp->links);
+		}
+	}
+
+	zpl_array_free(tooltips);
+}
+
+void tooltip_build_links(void) {
+	for (zpl_isize i = 0; i < zpl_array_count(tooltips); ++i) {
+		tooltip *tp = (tooltips + i);
+
+		for (zpl_isize j = 0; j < zpl_array_count(tooltips); ++j) {
+			tooltip *linked_tp = (tooltips + j);
+			if (tp == linked_tp)
+				continue;
+
+			if (strstr(tp->content, linked_tp->name)) {
+				if (!tp->links) {
+					zpl_array_init(tp->links, zpl_heap());
+				}
+
+				zpl_array_append(tp->links, linked_tp->name);
+			}
+		}
+	}
+}
+
+void tooltip_register_defaults(void) {
+	// test
+	tooltip_register( (tooltip) { .name = "ASSET_WOOD", .content = "Used as a building material or fuel for the ASSET_FURNACE." } );
+	tooltip_register( (tooltip) { .name = "ASSET_FURNACE", .content = "Producer used to smelt ASSET_IRON_ORE into ASSET_IRON_INGOT." } );
+	tooltip_register( (tooltip) { .name = "ASSET_IRON_ORE", .content = "Natural resource that can be smelted in ASSET_FURNACE." } );
+	tooltip_register( (tooltip) { .name = "ASSET_IRON_INGOT", .content = "Used as a building material. It is smelted from ASSET_IRON_ORE" } );
+}
+
+//~ rendering
+
+#define TOOLTIP_MOUSE_DIST 400.0f
+
+typedef struct _tooltip_node {
+	float xpos, ypos;
+	tooltip *desc;
+	struct _tooltip_node *next;
+} tooltip_node;
+
+static tooltip_node main_tooltip = { 0 };
+static bool tooltip__should_stay_open = false;
+
+tooltip *tooltip__find_desc(const char *name) {
+	for (zpl_isize i = 0; i < zpl_array_count(tooltips); ++i) {
+		tooltip *tp = (tooltips + i);
+
+		if (!strcmp(tp->name, name)) 
+			return tp;
+	}
+
+	return 0;
+}
+
+void tooltip_show(const char* name, float xpos, float ypos) {
+	if (!tooltips) return;
+
+	tooltip *desc = tooltip__find_desc(name);
+	if (!name) return;
+
+	main_tooltip = (tooltip_node) {
+		.xpos = xpos,
+		.ypos = ypos,
+		.desc = desc,
+		.next = 0
+	};
+}
+
+void tooltip__clear_node(tooltip_node *node) {
+	if (node->next) {
+		tooltip__clear_node(node->next);
+		zpl_mfree(node->next);
+	}
+}
+
+void tooltip_clear(void) {
+	tooltip__clear_node(&main_tooltip);
+	main_tooltip = (tooltip_node) {0};
+}
+
+void tooltip__draw_node(tooltip_node *node) {
+	if (!node) return;
+
+	tooltip *desc = node->desc;
+	Vector2 mpos = GetMousePosition();
+
+	if (nk_begin_titled(game_ui, zpl_bprintf("%d%s", (int)node->xpos, desc->name), desc->name, nk_rect(node->xpos, node->ypos, 300, 1200), 
+	             NK_WINDOW_BORDER | NK_WINDOW_NO_SCROLLBAR | NK_WINDOW_DYNAMIC | NK_WINDOW_TITLE | NK_WINDOW_MOVABLE)) {
+		nk_layout_row_dynamic(game_ui, 30, 1);
+		nk_label_wrap(game_ui, desc->content);
+
+		if (desc->links) {
+			nk_label(game_ui, "See Also:", NK_TEXT_LEFT);
+			nk_layout_row_dynamic(game_ui, 10, 2);
+
+			for (zpl_isize i = 0; i < zpl_array_count(desc->links); ++i) {
+				// todo styling
+				if (nk_button_label(game_ui, desc->links[i])) {
+					if (node->next) tooltip__clear_node(node->next);
+					if (!node->next) node->next = zpl_malloc(sizeof(tooltip_node));
+					*node->next = (tooltip_node) {
+						.xpos = mpos.x+5,
+						.ypos = mpos.y+5,
+						.desc = tooltip__find_desc(desc->links[i]),
+						.next = 0
+					};
+				}
+			}
+		}
+
+		// suggest closing tooltip 
+		struct  nk_vec2 wpos = nk_window_get_position(game_ui);
+		Vector2 tp_pos = (Vector2) { .x = wpos.x, .y = wpos.y };
+		if (Vector2Distance(mpos, tp_pos) <= TOOLTIP_MOUSE_DIST) {
+			tooltip__should_stay_open = true;
+		}
+
+		nk_end(game_ui);
+
+		// draw nested tooltip
+		if (node->next) {
+			tooltip__draw_node(node->next);
+		}
+	}
+}
+
+void tooltip_draw(void) {
+	if (!main_tooltip.desc) return;
+
+	tooltip__draw_node(&main_tooltip);
+
+	if (!tooltip__should_stay_open) {
+		tooltip_clear();
+	}
+
+	tooltip__should_stay_open = false;
+}

code/games/minimal/src/platform.c

@@ -21,6 +21,8 @@ ZPL_DIAGNOSTIC_POP
 #define ARCH_IMPL
 #include "platform/arch.h"
 
+#include "gui/tooltip.c"
+
 #include "renderer.c"
 
 void platform_init() {

code/games/sandbox/src/platform.c

@@ -26,6 +26,7 @@ ZPL_DIAGNOSTIC_POP
 #include "renderer.c"
 
 // NOTE(zaklaus): add-ins
+#include "gui/tooltip.c"
 #include "gui/build_mode.c"
 #include "gui/inventory.c"
 
@@ -34,6 +35,20 @@ void platform_init() {
     renderer_init();
     
     target_zoom = 2.70f;
+
+	tooltip_register_defaults();
+
+	// room for game-specific tooltips
+
+	tooltip_build_links();
+
+#if 0
+	// TEST
+	{
+		Vector2 mpos = GetMousePosition();
+		tooltip_show("ASSET_FURNACE", mpos.x, mpos.y);
+	}
+#endif
 }
 
 inline static
@@ -51,6 +66,7 @@ void display_conn_status() {
 
 void platform_shutdown() {
     renderer_shutdown();
+	tooltip_destroy_all();
     CloseWindow();
 }
 
@@ -187,6 +203,9 @@ void platform_render() {
             // NOTE(zaklaus): add-ins
             buildmode_draw();
             inventory_draw();
+
+			// goes last
+			tooltip_draw();
         }
         display_conn_status();
 		debug_draw();

eco2d.10x

@@ -15,7 +15,7 @@
 		<RunCommand></RunCommand>
 		<DebugCommand></DebugCommand>
 		<ExePathCommand></ExePathCommand>
-		<DebugSln></DebugSln>
+		<DebugSln>build\eco2d.sln</DebugSln>
 		<UseVisualStudioEnvBat>false</UseVisualStudioEnvBat>
 		<Configurations>
 			<Configuration>Debug</Configuration>