Add UI visibility toggle

Author: smokku

src/common/gfx.c

@@ -176,6 +176,11 @@ void gfx_disable_speaker_icon(void) {
     state.disable_speaker_icon = true;
 }
 
+void gfx_set_border(gfx_border_t border) {
+    assert(state.valid);
+    state.border = border;
+}
+
 chips_dim_t gfx_pixel_aspect(void) {
     assert(state.valid);
     return state.offscreen.pixel_aspect;

src/common/gfx.h

@@ -49,6 +49,7 @@ void gfx_shutdown(void);
 void gfx_flash_success(void);
 void gfx_flash_error(void);
 void gfx_disable_speaker_icon(void);
+void gfx_set_border(gfx_border_t border);
 chips_dim_t gfx_pixel_aspect(void);
 sg_view gfx_create_icon_texview(const uint8_t* packed_pixels, int width, int height, int stride, const char* label);
 

src/ui/ui_x65.cc

@@ -8,6 +8,8 @@
 #include "ui.h"
 #include <filesystem>
 
+extern "C" void app_set_disable_gui(bool hidden);
+
 #ifdef __EMSCRIPTEN__
     #include <emscripten/version.h>
 #endif
@@ -129,7 +131,7 @@ static void _ui_x65_draw_menu(ui_x65_t* ui) {
             if (ui->inject.menu_cb) {
                 ui->inject.menu_cb();
             }
-            if (ImGui::MenuItem("Reset UI")) {
+            if (ImGui::MenuItem(ICON_LC_ROTATE_CCW_SQUARE " Reset UI")) {
                 const ui_settings_t* settings = ui_settings();
                 for (int i = 0; i < settings->num_slots; i++) {
                     const ui_settings_slot_t* slot = &settings->slots[i];
@@ -139,6 +141,9 @@ static void _ui_x65_draw_menu(ui_x65_t* ui) {
                 ui_settings_init(&ui_empty_settings);
                 ui_x65_load_settings(ui, &ui_empty_settings);
             }
+            if (ImGui::MenuItem(ICON_LC_EYE_OFF " Hide UI", "Ctrl+Shift+H")) {
+                app_set_disable_gui(true);
+            }
             ImGui::EndMenu();
         }
         ImGui::EndMainMenuBar();

src/x65.c

@@ -49,7 +49,7 @@ static const char* settings_key = "Emu.x65";
 extern ui_settings_t* settings_load(const char* imgui_ini_key);
 int window_width = 0;
 int window_height = 0;
-static bool disable_gui = false;
+bool disable_gui = false;
 
 typedef struct {
     uint32_t version;
@@ -124,6 +124,21 @@ static gfx_border_t gui_border(bool no_gui) {
     };
 }
 
+#ifdef CHIPS_USE_UI
+// gfx draw_extra dispatch: gated on disable_gui at call time so the menu can
+// toggle UI visibility at runtime (init-time gating would lock the choice in)
+static void ui_draw_extra(const gfx_draw_info_t* draw_info) {
+    if (!disable_gui) {
+        ui_draw(draw_info);
+    }
+}
+
+void app_set_disable_gui(bool hidden) {
+    disable_gui = hidden;
+    gfx_set_border(gui_border(hidden));
+}
+#endif
+
 // audio-streaming callback
 static void push_audio(const float* samples, int num_samples, void* user_data) {
     (void)user_data;
@@ -239,7 +254,7 @@ void app_init(void) {
         .disable_speaker_icon = sargs_exists("disable-speaker-icon"),
 #ifdef CHIPS_USE_UI
         .init_extra_cb = ui_preinit,
-        .draw_extra_cb = disable_gui ? NULL : ui_draw,
+        .draw_extra_cb = ui_draw_extra,
 #endif
         .border = gui_border(disable_gui),
         .display_info = x65_display_info(&state.x65),
@@ -422,6 +437,19 @@ void app_input(const sapp_event* event) {
     }
 #endif
 #ifdef CHIPS_USE_UI
+    // Hide/show debug UI hotkey. Multi-modifier so it can't collide with X65
+    // input, intercepted (and swallowed) before HID forwarding.
+    if (event->type == SAPP_EVENTTYPE_KEY_DOWN || event->type == SAPP_EVENTTYPE_KEY_UP) {
+        const uint32_t hide_ui_mods = SAPP_MODIFIER_CTRL | SAPP_MODIFIER_SHIFT;
+        const bool is_hide_ui = event->key_code == SAPP_KEYCODE_H
+            && ((event->modifiers & hide_ui_mods) == hide_ui_mods);
+        if (is_hide_ui) {
+            if (event->type == SAPP_EVENTTYPE_KEY_DOWN) {
+                app_set_disable_gui(!disable_gui);
+            }
+            return;
+        }
+    }
     if (!disable_gui && ui_input(event)) {
         // input was handled by UI
         return;