Subghz app example (#365)

* Gui: ported submenu and view_dispatcher_remove_view from iButton branch

* App gui-test: use backported submenu api

* App subghz: initial commit

* App subghz: syntax fix

* App gui-test: fix submenu callback

* App subghz: add subfolders to build

* Gui view: c++ verison of with_view_model

* Subghz app: simple spectrum settings view

* Subghz app: add spectrum settings view to view manager

* Subghz app: spectrum settings scene

Co-authored-by: coreglitch <mail@s3f.ru>

applications/subghz/view/subghz-view-spectrum-settings.cpp

@@ -0,0 +1,95 @@
+#include "subghz-view-spectrum-settings.h"
+#include <callback-connector.h>
+
+struct SpectrumSettingsModel {
+    uint32_t start_freq;
+};
+
+/***************************************************************************************/
+
+static void draw_callback(Canvas* canvas, void* _model) {
+    SpectrumSettingsModel* model = static_cast<SpectrumSettingsModel*>(_model);
+    const uint8_t str_size = 64;
+    char str_buffer[str_size];
+
+    canvas_clear(canvas);
+    snprintf(str_buffer, str_size, "Start freq < %ld > MHz", model->start_freq);
+    canvas_draw_str_aligned(canvas, 64, 32, AlignCenter, AlignCenter, str_buffer);
+}
+
+static bool input_callback(InputEvent* event, void* context) {
+    SubghzViewSpectrumSettings* _this = static_cast<SubghzViewSpectrumSettings*>(context);
+
+    bool consumed = false;
+
+    // Process key presses only
+    if(event->type == InputTypeShort) {
+        if(event->key == InputKeyOk) {
+            _this->call_ok_callback();
+            consumed = true;
+        } else if(event->key == InputKeyLeft) {
+            with_view_model_cpp(_this->get_view(), SpectrumSettingsModel, model, {
+                model->start_freq--;
+                return true;
+            });
+            consumed = true;
+        } else if(event->key == InputKeyRight) {
+            with_view_model_cpp(_this->get_view(), SpectrumSettingsModel, model, {
+                model->start_freq++;
+                return true;
+            });
+            consumed = true;
+        }
+    }
+
+    return consumed;
+}
+
+/***************************************************************************************/
+
+View* SubghzViewSpectrumSettings::get_view() {
+    return view;
+}
+
+void SubghzViewSpectrumSettings::set_ok_callback(OkCallback callback, void* context) {
+    ok_callback = callback;
+    ok_callback_context = context;
+}
+
+void SubghzViewSpectrumSettings::call_ok_callback() {
+    if(ok_callback != nullptr) {
+        ok_callback(ok_callback_context);
+    }
+}
+
+void SubghzViewSpectrumSettings::set_start_freq(uint32_t start_freq) {
+    with_view_model_cpp(view, SpectrumSettingsModel, model, {
+        model->start_freq = start_freq;
+        return true;
+    });
+}
+
+uint32_t SubghzViewSpectrumSettings::get_start_freq() {
+    uint32_t result;
+
+    with_view_model_cpp(view, SpectrumSettingsModel, model, {
+        result = model->start_freq;
+        return false;
+    });
+
+    return result;
+}
+
+SubghzViewSpectrumSettings::SubghzViewSpectrumSettings() {
+    view = view_alloc();
+    view_set_context(view, this);
+    view_allocate_model(view, ViewModelTypeLocking, sizeof(SpectrumSettingsModel));
+
+    view_set_draw_callback(view, draw_callback);
+
+    view_set_input_callback(view, input_callback);
+}
+
+SubghzViewSpectrumSettings::~SubghzViewSpectrumSettings() {
+    view_free(view);
+}

applications/subghz/view/subghz-view-spectrum-settings.h

@@ -0,0 +1,25 @@
+#include <gui/view.h>
+
+class SubghzViewSpectrumSettings {
+public:
+    SubghzViewSpectrumSettings();
+    ~SubghzViewSpectrumSettings();
+
+    View* get_view();
+
+    // ok callback methods
+    typedef void (*OkCallback)(void* context);
+    void set_ok_callback(OkCallback callback, void* context);
+    void call_ok_callback();
+
+    // model data getters/setters
+    void set_start_freq(uint32_t start_freq);
+    uint32_t get_start_freq();
+
+private:
+    View* view;
+
+    // ok callback data
+    OkCallback ok_callback = nullptr;
+    void* ok_callback_context = nullptr;
+};