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feat: implement MCP drawing as screensaver instead of standalone app

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- Add ScreensaverType::McpScreen to DisplaySettings enum, toString/fromString
- Add 'MCP Screen' option to the Display settings screensaver dropdown
- New McpScreensaver (Screensaver subclass): creates full-screen lv_canvas on
  the overlay, allocates framebuffer in SPIRAM, registers canvas pointer in
  McpSystemState, shows 'Waiting for LLM...' until first draw command arrives
- Wire McpScreensaver into DisplayIdle::activateScreensaver() switch
- McpSystem::ensureOverrideScreen() now calls displayidle::findService()->
  startScreensaver() instead of launching McpOverrideApp — canvas appears
  automatically on any LLM draw command
- Remove McpOverrideApp (replaced by screensaver), deregister from Tactility.cpp
- Remove mcpOverrideEnabled from McpSettings — no longer needed
- Simplify McpSettingsApp: remove Screen Override toggle, update info text to
  direct users to Settings -> Display -> Screensaver -> MCP Screen
This commit is contained in:
Adolfo Reyna
2026-06-27 09:17:50 -04:00
parent 41004a3c6f
commit cd921e1aa9
11 changed files with 160 additions and 59 deletions
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Tactility/Source/app/mcpsettings/McpSettingsApp.cpp
+5 -34
View File
@@ -26,7 +26,6 @@ class McpSettingsApp final : public App {
bool updated = false;
lv_obj_t* switchMcpEnabled = nullptr;
lv_obj_t* switchMcpOverrideEnabled = nullptr;
lv_obj_t* labelUrlValue = nullptr;
static void onMcpEnabledSwitch(lv_event_t* e) {
@@ -42,15 +41,6 @@ class McpSettingsApp final : public App {
});
}
static void onMcpOverrideSwitch(lv_event_t* e) {
auto* app = static_cast<McpSettingsApp*>(lv_event_get_user_data(e));
bool enabled = lv_obj_has_state(app->switchMcpOverrideEnabled, LV_STATE_CHECKED);
getMainDispatcher().dispatch([app, enabled] {
app->mcpSettings.mcpOverrideEnabled = enabled;
app->updated = true;
});
}
void updateUrlDisplay() {
if (!labelUrlValue) return;
@@ -60,7 +50,7 @@ class McpSettingsApp final : public App {
}
std::string url = "http://";
if (wsSettings.wifiMode == settings::webserver::WiFiMode::AccessPoint) {
url += "192.168.4.1";
} else {
@@ -114,23 +104,6 @@ public:
lv_obj_set_width(main_wrapper, LV_PCT(100));
lv_obj_set_flex_grow(main_wrapper, 1);
// Screen Override Switch
auto* override_wrapper = lv_obj_create(main_wrapper);
lv_obj_set_size(override_wrapper, LV_PCT(100), LV_SIZE_CONTENT);
lv_obj_set_style_pad_all(override_wrapper, 0, LV_STATE_DEFAULT);
lv_obj_set_style_border_width(override_wrapper, 0, LV_STATE_DEFAULT);
auto* override_label = lv_label_create(override_wrapper);
lv_label_set_text(override_label, "Screen Override");
lv_obj_align(override_label, LV_ALIGN_LEFT_MID, 0, 0);
switchMcpOverrideEnabled = lv_switch_create(override_wrapper);
if (mcpSettings.mcpOverrideEnabled) {
lv_obj_add_state(switchMcpOverrideEnabled, LV_STATE_CHECKED);
}
lv_obj_align(switchMcpOverrideEnabled, LV_ALIGN_RIGHT_MID, 0, 0);
lv_obj_add_event_cb(switchMcpOverrideEnabled, onMcpOverrideSwitch, LV_EVENT_VALUE_CHANGED, this);
// URL Display
auto* url_wrapper = lv_obj_create(main_wrapper);
lv_obj_set_size(url_wrapper, LV_PCT(100), LV_SIZE_CONTENT);
@@ -138,10 +111,10 @@ public:
lv_obj_set_style_border_width(url_wrapper, 1, LV_STATE_DEFAULT);
lv_obj_set_flex_flow(url_wrapper, LV_FLEX_FLOW_COLUMN);
lv_obj_set_style_flex_cross_place(url_wrapper, LV_FLEX_ALIGN_START, 0);
auto* url_title = lv_label_create(url_wrapper);
lv_label_set_text(url_title, "MCP Endpoint URL:");
labelUrlValue = lv_label_create(url_wrapper);
if (lv_display_get_color_format(lv_obj_get_display(parent)) == LV_COLOR_FORMAT_L8) {
lv_obj_set_style_text_color(labelUrlValue, lv_theme_get_color_secondary(labelUrlValue), LV_PART_MAIN);
@@ -164,7 +137,8 @@ public:
"Endpoints:\n"
"- POST /api/mcp (JSON-RPC tools)\n"
"- POST /api/screen/raw (big-endian RGB565 writes)\n\n"
"If Screen Override is enabled, the device automatically shows the canvas upon receiving drawing calls.");
"To show the LLM canvas, select 'MCP Screen' in Settings -> Display -> Screensaver. "
"The canvas also pops up automatically when an LLM sends a draw command.");
}
void onHide(AppContext& app) override {
@@ -183,9 +157,6 @@ public:
if (mcpStateChanged) {
LOGGER.info("MCP server state changed to {}", copy.mcpEnabled ? "enabled" : "disabled");
// Control the WebServer service immediately through setWebServerEnabled
// WebServerService will check mcpSettings internally when setEnabled is executed
service::webserver::setWebServerEnabled(copy.mcpEnabled);
}
});