Deallocate menu buttons to save memory (#1971)

* Deallocate hidden menu buttons
* Added Copyright
* Added comments

firmware/application/apps/ui_debug.cpp

@@ -1,6 +1,7 @@
 /*
  * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
  * Copyright (C) 2024 Mark Thompson
+ * Copyright (C) 2024 u-foka
  *
  * This file is part of PortaPack.
  *
@@ -445,14 +446,19 @@ void DebugControlsView::focus() {
 
 /* DebugPeripheralsMenuView **********************************************/
 
-DebugPeripheralsMenuView::DebugPeripheralsMenuView(NavigationView& nav) {
+DebugPeripheralsMenuView::DebugPeripheralsMenuView(NavigationView& nav)
+    : nav_(nav) {
+    set_max_rows(2);  // allow wider buttons
+}
+
+void DebugPeripheralsMenuView::on_populate() {
     const char* max283x = hackrf_r9 ? "MAX2839" : "MAX2837";
     const char* si5351x = hackrf_r9 ? "Si5351A" : "Si5351C";
     add_items({
-        {"RFFC5072", ui::Color::dark_cyan(), &bitmap_icon_peripherals_details, [&nav]() { nav.push<RegistersView>("RFFC5072", RegistersWidgetConfig{CT_RFFC5072, 31, 31, 16}); }},
+        {"RFFC5072", ui::Color::dark_cyan(), &bitmap_icon_peripherals_details, [this]() { nav_.push<RegistersView>("RFFC5072", RegistersWidgetConfig{CT_RFFC5072, 31, 31, 16}); }},
-        {max283x, ui::Color::dark_cyan(), &bitmap_icon_peripherals_details, [&nav, max283x]() { nav.push<RegistersView>(max283x, RegistersWidgetConfig{CT_MAX283X, 32, 32, 10}); }},
+        {max283x, ui::Color::dark_cyan(), &bitmap_icon_peripherals_details, [this, max283x]() { nav_.push<RegistersView>(max283x, RegistersWidgetConfig{CT_MAX283X, 32, 32, 10}); }},
-        {si5351x, ui::Color::dark_cyan(), &bitmap_icon_peripherals_details, [&nav, si5351x]() { nav.push<RegistersView>(si5351x, RegistersWidgetConfig{CT_SI5351, 188, 96, 8}); }},
+        {si5351x, ui::Color::dark_cyan(), &bitmap_icon_peripherals_details, [this, si5351x]() { nav_.push<RegistersView>(si5351x, RegistersWidgetConfig{CT_SI5351, 188, 96, 8}); }},
-        {audio::debug::codec_name(), ui::Color::dark_cyan(), &bitmap_icon_peripherals_details, [&nav]() { nav.push<RegistersView>(audio::debug::codec_name(), RegistersWidgetConfig{CT_AUDIO, audio::debug::reg_count(), audio::debug::reg_count(), audio::debug::reg_bits()}); }},
+        {audio::debug::codec_name(), ui::Color::dark_cyan(), &bitmap_icon_peripherals_details, [this]() { nav_.push<RegistersView>(audio::debug::codec_name(), RegistersWidgetConfig{CT_AUDIO, audio::debug::reg_count(), audio::debug::reg_count(), audio::debug::reg_bits()}); }},
     });
     set_max_rows(2);  // allow wider buttons
 }
@@ -468,32 +474,38 @@ DebugReboot::DebugReboot(NavigationView& nav) {
         __WFE();
 }
 
+void DebugReboot::on_populate() {
+}
+
 /* DebugMenuView *********************************************************/
 
-DebugMenuView::DebugMenuView(NavigationView& nav) {
+DebugMenuView::DebugMenuView(NavigationView& nav)
+    : nav_(nav) {
+    set_max_rows(2);  // allow wider buttons
+}
+
+void DebugMenuView::on_populate() {
     if (portapack::persistent_memory::show_gui_return_icon()) {
-        add_items({{"..", ui::Color::light_grey(), &bitmap_icon_previous, [&nav]() { nav.pop(); }}});
+        add_items({{"..", ui::Color::light_grey(), &bitmap_icon_previous, [this]() { nav_.pop(); }}});
     }
     add_items({
-        {"Buttons Test", ui::Color::dark_cyan(), &bitmap_icon_controls, [&nav]() { nav.push<DebugControlsView>(); }},
+        {"Buttons Test", ui::Color::dark_cyan(), &bitmap_icon_controls, [this]() { nav_.push<DebugControlsView>(); }},
-        {"Debug Dump", ui::Color::dark_cyan(), &bitmap_icon_memory, [&nav]() { portapack::persistent_memory::debug_dump(); }},
+        {"Debug Dump", ui::Color::dark_cyan(), &bitmap_icon_memory, [this]() { portapack::persistent_memory::debug_dump(); }},
-        {"M0 Stack Dump", ui::Color::dark_cyan(), &bitmap_icon_memory, [&nav]() { stack_dump(); }},
+        {"M0 Stack Dump", ui::Color::dark_cyan(), &bitmap_icon_memory, [this]() { stack_dump(); }},
-        {"Memory Dump", ui::Color::dark_cyan(), &bitmap_icon_memory, [&nav]() { nav.push<DebugMemoryDumpView>(); }},
+        {"Memory Dump", ui::Color::dark_cyan(), &bitmap_icon_memory, [this]() { nav_.push<DebugMemoryDumpView>(); }},
-        //{"Memory Usage", ui::Color::dark_cyan(), &bitmap_icon_memory, [&nav]() { nav.push<DebugMemoryView>(); }},
+        //{"Memory Usage", ui::Color::dark_cyan(), &bitmap_icon_memory, [this]() { nav_.push<DebugMemoryView>(); }},
-        {"Peripherals", ui::Color::dark_cyan(), &bitmap_icon_peripherals, [&nav]() { nav.push<DebugPeripheralsMenuView>(); }},
+        {"Peripherals", ui::Color::dark_cyan(), &bitmap_icon_peripherals, [this]() { nav_.push<DebugPeripheralsMenuView>(); }},
-        {"Pers. Memory", ui::Color::dark_cyan(), &bitmap_icon_memory, [&nav]() { nav.push<DebugPmemView>(); }},
+        {"Pers. Memory", ui::Color::dark_cyan(), &bitmap_icon_memory, [this]() { nav_.push<DebugPmemView>(); }},
-        //{ "Radio State",	ui::Color::white(),	nullptr,	[&nav](){ nav.push<NotImplementedView>(); } },
+        //{ "Radio State",	ui::Color::white(),	nullptr,	[this](){ nav_.push<NotImplementedView>(); } },
-        {"Reboot", ui::Color::dark_cyan(), &bitmap_icon_setup, [&nav]() { nav.push<DebugReboot>(); }},
+        {"Reboot", ui::Color::dark_cyan(), &bitmap_icon_setup, [this]() { nav_.push<DebugReboot>(); }},
-        {"SD Card", ui::Color::dark_cyan(), &bitmap_icon_sdcard, [&nav]() { nav.push<SDCardDebugView>(); }},
+        {"SD Card", ui::Color::dark_cyan(), &bitmap_icon_sdcard, [this]() { nav_.push<SDCardDebugView>(); }},
-        {"Temperature", ui::Color::dark_cyan(), &bitmap_icon_temperature, [&nav]() { nav.push<TemperatureView>(); }},
+        {"Temperature", ui::Color::dark_cyan(), &bitmap_icon_temperature, [this]() { nav_.push<TemperatureView>(); }},
-        {"Touch Test", ui::Color::dark_cyan(), &bitmap_icon_notepad, [&nav]() { nav.push<DebugScreenTest>(); }},
+        {"Touch Test", ui::Color::dark_cyan(), &bitmap_icon_notepad, [this]() { nav_.push<DebugScreenTest>(); }},
     });
 
-    for (auto const& gridItem : ExternalItemsMenuLoader::load_external_items(app_location_t::DEBUG, nav)) {
+    for (auto const& gridItem : ExternalItemsMenuLoader::load_external_items(app_location_t::DEBUG, nav_)) {
         add_item(gridItem);
     };
-
-    set_max_rows(2);  // allow wider buttons
 }
 
 /* DebugMemoryDumpView *********************************************************/

firmware/application/apps/ui_debug.hpp

@@ -1,6 +1,7 @@
 /*
  * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
  * Copyright (C) 2024 Mark Thompson
+ * Copyright (C) 2024 u-foka
  *
  * This file is part of PortaPack.
  *
@@ -422,17 +423,28 @@ class DebugPeripheralsMenuView : public BtnGridView {
    public:
     DebugPeripheralsMenuView(NavigationView& nav);
     std::string title() const override { return "Peripherals"; };
+
+   private:
+    NavigationView& nav_;
+    void on_populate() override;
 };
 
 class DebugReboot : public BtnGridView {
    public:
     DebugReboot(NavigationView& nav);
+
+   private:
+    void on_populate() override;
 };
 
 class DebugMenuView : public BtnGridView {
    public:
     DebugMenuView(NavigationView& nav);
     std::string title() const override { return "Debug"; };
+
+   private:
+    NavigationView& nav_;
+    void on_populate() override;
 };
 
 } /* namespace ui */

firmware/application/apps/ui_settings.cpp

@@ -4,6 +4,7 @@
  * Copyright (C) 2023 gullradriel, Nilorea Studio Inc.
  * Copyright (C) 2023 Kyle Reed
  * Copyright (C) 2024 Mark Thompson
+ * Copyright (C) 2024 u-foka
  * Copyleft (ɔ) 2024 zxkmm under GPL license
  *
  * This file is part of PortaPack.
@@ -835,28 +836,32 @@ void SetMenuColorView::focus() {
 
 /* SettingsMenuView **************************************/
 
-SettingsMenuView::SettingsMenuView(NavigationView& nav) {
+SettingsMenuView::SettingsMenuView(NavigationView& nav)
-    if (pmem::show_gui_return_icon()) {
+    : nav_(nav) {
-        add_items({{"..", ui::Color::light_grey(), &bitmap_icon_previous, [&nav]() { nav.pop(); }}});
-    }
-    add_items({
-        {"App Settings", ui::Color::dark_cyan(), &bitmap_icon_notepad, [&nav]() { nav.push<AppSettingsView>(); }},
-        {"Audio", ui::Color::dark_cyan(), &bitmap_icon_speaker, [&nav]() { nav.push<SetAudioView>(); }},
-        {"Calibration", ui::Color::dark_cyan(), &bitmap_icon_options_touch, [&nav]() { nav.push<TouchCalibrationView>(); }},
-        {"Config Mode", ui::Color::dark_cyan(), &bitmap_icon_clk_ext, [&nav]() { nav.push<SetConfigModeView>(); }},
-        {"Converter", ui::Color::dark_cyan(), &bitmap_icon_options_radio, [&nav]() { nav.push<SetConverterSettingsView>(); }},
-        {"Date/Time", ui::Color::dark_cyan(), &bitmap_icon_options_datetime, [&nav]() { nav.push<SetDateTimeView>(); }},
-        {"Encoder Dial", ui::Color::dark_cyan(), &bitmap_icon_setup, [&nav]() { nav.push<SetEncoderDialView>(); }},
-        {"Freq. Correct", ui::Color::dark_cyan(), &bitmap_icon_options_radio, [&nav]() { nav.push<SetFrequencyCorrectionView>(); }},
-        {"P.Memory Mgmt", ui::Color::dark_cyan(), &bitmap_icon_memory, [&nav]() { nav.push<SetPersistentMemoryView>(); }},
-        {"Radio", ui::Color::dark_cyan(), &bitmap_icon_options_radio, [&nav]() { nav.push<SetRadioView>(); }},
-        {"SD Card", ui::Color::dark_cyan(), &bitmap_icon_sdcard, [&nav]() { nav.push<SetSDCardView>(); }},
-        {"User Interface", ui::Color::dark_cyan(), &bitmap_icon_options_ui, [&nav]() { nav.push<SetUIView>(); }},
-        {"QR Code", ui::Color::dark_cyan(), &bitmap_icon_qr_code, [&nav]() { nav.push<SetQRCodeView>(); }},
-        {"Brightness", ui::Color::dark_cyan(), &bitmap_icon_brightness, [&nav]() { nav.push<SetFakeBrightnessView>(); }},
-        {"Menu Color", ui::Color::dark_cyan(), &bitmap_icon_brightness, [&nav]() { nav.push<SetMenuColorView>(); }},
-    });
     set_max_rows(2);  // allow wider buttons
 }
 
+void SettingsMenuView::on_populate() {
+    if (pmem::show_gui_return_icon()) {
+        add_items({{"..", ui::Color::light_grey(), &bitmap_icon_previous, [this]() { nav_.pop(); }}});
+    }
+    add_items({
+        {"App Settings", ui::Color::dark_cyan(), &bitmap_icon_notepad, [this]() { nav_.push<AppSettingsView>(); }},
+        {"Audio", ui::Color::dark_cyan(), &bitmap_icon_speaker, [this]() { nav_.push<SetAudioView>(); }},
+        {"Calibration", ui::Color::dark_cyan(), &bitmap_icon_options_touch, [this]() { nav_.push<TouchCalibrationView>(); }},
+        {"Config Mode", ui::Color::dark_cyan(), &bitmap_icon_clk_ext, [this]() { nav_.push<SetConfigModeView>(); }},
+        {"Converter", ui::Color::dark_cyan(), &bitmap_icon_options_radio, [this]() { nav_.push<SetConverterSettingsView>(); }},
+        {"Date/Time", ui::Color::dark_cyan(), &bitmap_icon_options_datetime, [this]() { nav_.push<SetDateTimeView>(); }},
+        {"Encoder Dial", ui::Color::dark_cyan(), &bitmap_icon_setup, [this]() { nav_.push<SetEncoderDialView>(); }},
+        {"Freq. Correct", ui::Color::dark_cyan(), &bitmap_icon_options_radio, [this]() { nav_.push<SetFrequencyCorrectionView>(); }},
+        {"P.Memory Mgmt", ui::Color::dark_cyan(), &bitmap_icon_memory, [this]() { nav_.push<SetPersistentMemoryView>(); }},
+        {"Radio", ui::Color::dark_cyan(), &bitmap_icon_options_radio, [this]() { nav_.push<SetRadioView>(); }},
+        {"SD Card", ui::Color::dark_cyan(), &bitmap_icon_sdcard, [this]() { nav_.push<SetSDCardView>(); }},
+        {"User Interface", ui::Color::dark_cyan(), &bitmap_icon_options_ui, [this]() { nav_.push<SetUIView>(); }},
+        {"QR Code", ui::Color::dark_cyan(), &bitmap_icon_qr_code, [this]() { nav_.push<SetQRCodeView>(); }},
+        {"Brightness", ui::Color::dark_cyan(), &bitmap_icon_brightness, [this]() { nav_.push<SetFakeBrightnessView>(); }},
+        {"Menu Color", ui::Color::dark_cyan(), &bitmap_icon_brightness, [this]() { nav_.push<SetMenuColorView>(); }},
+    });
+}
+
 } /* namespace ui */

firmware/application/apps/ui_settings.hpp

@@ -4,6 +4,7 @@
  * Copyright (C) 2023 gullradriel, Nilorea Studio Inc.
  * Copyright (C) 2023 Kyle Reed
  * Copyright (C) 2024 Mark Thompson
+ * Copyright (C) 2024 u-foka
  * Copyleft (ɔ) 2024 zxkmm under GPL license
  *
  * This file is part of PortaPack.
@@ -792,8 +793,11 @@ class SetMenuColorView : public View {
 class SettingsMenuView : public BtnGridView {
    public:
     SettingsMenuView(NavigationView& nav);
-
     std::string title() const override { return "Settings"; };
+
+   private:
+    NavigationView& nav_;
+    void on_populate() override;
 };
 
 } /* namespace ui */

firmware/application/ui/ui_btngrid.cpp

@@ -3,6 +3,7 @@
  * Copyright (C) 2016 Furrtek
  * Copyright (C) 2019 Elia Yehuda (z4ziggy)
  * Copyright (C) 2023 Mark Thompson
+ * Copyright (C) 2024 u-foka
  *
  * This file is part of PortaPack.
  *
@@ -106,7 +107,12 @@ void BtnGridView::on_tick_second() {
 }
 
 void BtnGridView::clear() {
-    menu_items.clear();
+    std::vector<GridItem>().swap(menu_items);  // clear vector and release memory
+
+    for (auto& item : menu_item_views)
+        remove_child(item.get());
+
+    std::vector<std::unique_ptr<NewButton>>().swap(menu_item_views);  // clear vector and release memory
 }
 
 void BtnGridView::add_items(std::initializer_list<GridItem> new_items) {
@@ -207,11 +213,23 @@ void BtnGridView::on_focus() {
 
 void BtnGridView::on_blur() {
 #if 0
-	if (!keep_highlight)
+    if (!keep_highlight)
-		item_view(highlighted_item - offset)->unhighlight();
+        item_view(highlighted_item - offset)->unhighlight();
 #endif
 }
 
+void BtnGridView::on_show() {
+    on_populate();
+
+    View::on_show();
+}
+
+void BtnGridView::on_hide() {
+    View::on_hide();
+
+    clear();
+}
+
 bool BtnGridView::on_key(const KeyEvent key) {
     switch (key) {
         case KeyEvent::Up:

firmware/application/ui/ui_btngrid.hpp

@@ -2,6 +2,7 @@
  * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
  * Copyright (C) 2016 Furrtek
  * Copyright (C) 2019 Elia Yehuda (z4ziggy)
+ * Copyright (C) 2024 u-foka
  *
  * This file is part of PortaPack.
  *
@@ -73,10 +74,15 @@ class BtnGridView : public View {
     void set_arrow_enabled(bool enabled);
     void on_focus() override;
     void on_blur() override;
+    void on_show() override;
+    void on_hide() override;
     bool on_key(const KeyEvent event) override;
     bool on_encoder(const EncoderEvent event) override;
     bool blacklisted_app(GridItem new_item);
 
+   protected:
+    virtual void on_populate() = 0;
+
    private:
     int rows_{3};
     void update_items();

firmware/application/ui_navigation.cpp

@@ -740,40 +740,49 @@ void addExternalItems(NavigationView& nav, app_location_t location, BtnGridView&
 
 /* ReceiversMenuView *****************************************************/
 
-ReceiversMenuView::ReceiversMenuView(NavigationView& nav) {
+ReceiversMenuView::ReceiversMenuView(NavigationView& nav)
+    : nav_(nav) {}
+
+void ReceiversMenuView::on_populate() {
     if (pmem::show_gui_return_icon()) {
-        add_item({"..", Color::light_grey(), &bitmap_icon_previous, [&nav]() { nav.pop(); }});
+        add_item({"..", Color::light_grey(), &bitmap_icon_previous, [this]() { nav_.pop(); }});
     }
 
-    add_apps(nav, *this, RX);
+    add_apps(nav_, *this, RX);
 
-    addExternalItems(nav, app_location_t::RX, *this);
+    addExternalItems(nav_, app_location_t::RX, *this);
 }
 
 /* TransmittersMenuView **************************************************/
 
-TransmittersMenuView::TransmittersMenuView(NavigationView& nav) {
+TransmittersMenuView::TransmittersMenuView(NavigationView& nav)
+    : nav_(nav) {}
+
+void TransmittersMenuView::on_populate() {
     if (pmem::show_gui_return_icon()) {
-        add_items({{"..", Color::light_grey(), &bitmap_icon_previous, [&nav]() { nav.pop(); }}});
+        add_items({{"..", Color::light_grey(), &bitmap_icon_previous, [this]() { nav_.pop(); }}});
     }
 
-    add_apps(nav, *this, TX);
+    add_apps(nav_, *this, TX);
 
-    addExternalItems(nav, app_location_t::TX, *this);
+    addExternalItems(nav_, app_location_t::TX, *this);
 }
 
 /* UtilitiesMenuView *****************************************************/
 
-UtilitiesMenuView::UtilitiesMenuView(NavigationView& nav) {
+UtilitiesMenuView::UtilitiesMenuView(NavigationView& nav)
+    : nav_(nav) {
+    set_max_rows(2);  // allow wider buttons
+}
+
+void UtilitiesMenuView::on_populate() {
     if (pmem::show_gui_return_icon()) {
-        add_items({{"..", Color::light_grey(), &bitmap_icon_previous, [&nav]() { nav.pop(); }}});
+        add_items({{"..", Color::light_grey(), &bitmap_icon_previous, [this]() { nav_.pop(); }}});
     }
 
-    add_apps(nav, *this, UTILITIES);
+    add_apps(nav_, *this, UTILITIES);
 
-    addExternalItems(nav, app_location_t::UTILITIES, *this);
+    addExternalItems(nav_, app_location_t::UTILITIES, *this);
-
-    set_max_rows(2);  // allow wider buttons
 }
 
 /* SystemMenuView ********************************************************/
@@ -790,15 +799,18 @@ void SystemMenuView::hackrf_mode(NavigationView& nav) {
         });
 }
 
-SystemMenuView::SystemMenuView(NavigationView& nav) {
+SystemMenuView::SystemMenuView(NavigationView& nav)
-    add_apps(nav, *this, HOME);
+    : nav_(nav) {
-
-    add_item({"HackRF", Color::cyan(), &bitmap_icon_hackrf, [this, &nav]() { hackrf_mode(nav); }});
-
     set_max_rows(2);  // allow wider buttons
     set_arrow_enabled(false);
 }
 
+void SystemMenuView::on_populate() {
+    add_apps(nav_, *this, HOME);
+
+    add_item({"HackRF", Color::cyan(), &bitmap_icon_hackrf, [this]() { hackrf_mode(nav_); }});
+}
+
 /* SystemView ************************************************************/
 
 SystemView::SystemView(

firmware/application/ui_navigation.hpp

@@ -329,18 +329,30 @@ class ReceiversMenuView : public BtnGridView {
    public:
     ReceiversMenuView(NavigationView& nav);
     std::string title() const override { return "Receive"; };
+
+   private:
+    NavigationView& nav_;
+    void on_populate() override;
 };
 
 class TransmittersMenuView : public BtnGridView {
    public:
     TransmittersMenuView(NavigationView& nav);
     std::string title() const override { return "Transmit"; };
+
+   private:
+    NavigationView& nav_;
+    void on_populate() override;
 };
 
 class UtilitiesMenuView : public BtnGridView {
    public:
     UtilitiesMenuView(NavigationView& nav);
     std::string title() const override { return "Utilities"; };
+
+   private:
+    NavigationView& nav_;
+    void on_populate() override;
 };
 
 class SystemMenuView : public BtnGridView {
@@ -348,6 +360,8 @@ class SystemMenuView : public BtnGridView {
     SystemMenuView(NavigationView& nav);
 
    private:
+    NavigationView& nav_;
+    void on_populate() override;
     void hackrf_mode(NavigationView& nav);
 };