navigate with pageIndicator and commands to prev and next gui

Platformio/src/applicationInternal/gui/guiBase.cpp

@@ -33,6 +33,18 @@ void guis_doAfterSliding(int oldTabID, int newTabID, bool newGuiList);
 
 // Helper Functions -----------------------------------------------------------------------------------------------------------------------
 
+// callback when pageIndicator prev or next was clicked
+void pageIndicator_navigate_event_cb(lv_event_t* e) {
+  lv_obj_t* target = lv_event_get_target(e);
+  
+  int user_data = (intptr_t)(target->user_data);
+  if (user_data == 0) {
+    executeCommand(GUI_PREV);
+  } else if (user_data == 1) {
+    executeCommand(GUI_NEXT);
+  }
+}
+
 // callback when sceneLabel or pageIndicator was clicked
 void sceneLabel_or_pageIndicator_event_cb(lv_event_t* e) {
   Serial.println("- Scene selection: sceneLabel or pageIndicator clicked received for navigating to scene selection page");
@@ -100,9 +112,7 @@ void tabview_tab_changed_event_cb(lv_event_t* e) {
     // https://forum.lvgl.io/t/delete-a-tab-after-the-tabview-scroll-animation-is-complete/3155/4
     lv_obj_t* myTabview = lv_event_get_target(e);
     lv_obj_t* tabContainer = lv_tabview_get_content(myTabview);
-    // https://docs.lvgl.io/8.3/overview/animation.html?highlight=lv_anim_get#_CPPv411lv_anim_getPv18lv_anim_exec_xcb_t
+    lv_anim_t* anim = lv_anim_get(tabContainer, NULL);
-    // (lv_anim_exec_xcb_t) lv_obj_set_x does not find an animation. NULL is good as well.
-    lv_anim_t* anim = lv_anim_get(tabContainer, NULL); // (lv_anim_exec_xcb_t) lv_obj_set_x);
     if(anim) {
       // Swipe is not yet complete. User released the touch screen, an animation will bring it to the end.
       // That's the normal (and only?) case for the tft touchscreen
@@ -305,7 +315,7 @@ void guis_doAfterSliding(int oldTabID, int newTabID, bool newGuiList) {
   doLogMemoryUsage();
 }
 
-void setActiveTab(uint32_t index, lv_anim_enable_t anim_en) {
+void setActiveTab(uint32_t index, lv_anim_enable_t anim_en, bool send_tab_changed_event) {
   // unsigned long startTime = millis();
   if (anim_en == LV_ANIM_ON) {
     lv_tabview_set_act(tabview, index, LV_ANIM_ON);
@@ -318,6 +328,10 @@ void setActiveTab(uint32_t index, lv_anim_enable_t anim_en) {
     // lv_timer_handler();
     // log_memory();
   }
+
+  if (send_tab_changed_event) {
+    lv_event_send(tabview, LV_EVENT_VALUE_CHANGED, NULL);
+  }
 }
 
 void showWiFiConnected(bool connected) {

Platformio/src/applicationInternal/gui/guiBase.h

@@ -31,7 +31,8 @@ void gui_loop(void);
 void tabview_content_is_scrolling_event_cb(lv_event_t* e);
 void tabview_tab_changed_event_cb(lv_event_t* e);
 void sceneLabel_or_pageIndicator_event_cb(lv_event_t* e);
-void setActiveTab(uint32_t index, lv_anim_enable_t anim_en);
+void pageIndicator_navigate_event_cb(lv_event_t* e);
+void setActiveTab(uint32_t index, lv_anim_enable_t anim_en, bool send_tab_changed_event = false);
 // used by memoryUsage.cpp
 void showMemoryUsageBar(bool showBar);
 // used by commandHandler to show WiFi status

Platformio/src/applicationInternal/gui/guiMemoryOptimizer.cpp

@@ -13,6 +13,23 @@ tab_in_memory tabs_in_memory[3] = {{NULL, -1, ""}, {NULL, -1, ""}, {NULL, -1, ""
 // holds the ids of the tabs we had in memory before, so that we can determine the next or previous id
 int tabs_in_memory_previous_listIndex[3]= {-1 , -1, -1};
 
+bool gui_memoryOptimizer_isTabIDInMemory(u_int8_t tabID) {
+  // range check
+  if ((tabID < 0) || (tabID >= 3)) {
+    return false;
+  }
+  return (tabs_in_memory[tabID].listIndex != -1);
+}
+
+bool gui_memoryOptimizer_isGUInameInMemory(std::string guiName) {
+  for (uint8_t index=0; index <= 2; index++) {
+    if (tabs_in_memory[index].guiName == guiName) {
+      return true;
+    }
+  }
+  return false;
+}
+
 void notify_active_tabs_before_delete() {
   Serial.printf("  Will notify tabs about deletion\r\n");
   std::string nameOfTab;
@@ -309,6 +326,21 @@ void fillPanelWithPageIndicator_strategyMax3(lv_obj_t* panel, lv_obj_t* img1, lv
       if (nameOfTab == get_currentGUIname()) {
         lv_obj_add_flag(btn, LV_OBJ_FLAG_CLICKABLE);
         lv_obj_add_event_cb(btn, sceneLabel_or_pageIndicator_event_cb, LV_EVENT_CLICKED, NULL);
+
+      } else if ((i==0 || i==1) && (tabs_in_memory[i+1].listIndex != -1)) {
+        // this is the button on the previous tab, which can be seen on the active tab
+        // activate click to prev tab
+        lv_obj_add_flag(btn, LV_OBJ_FLAG_CLICKABLE);
+        lv_obj_set_user_data(btn,(void *)(intptr_t)0);
+        lv_obj_add_event_cb(btn, pageIndicator_navigate_event_cb, LV_EVENT_CLICKED, NULL);
+
+      } else if (i==1 || i==2) {
+        // this is the button on the next tab, which can be seen on the active tab
+        // activate click to next tab
+        lv_obj_add_flag(btn, LV_OBJ_FLAG_CLICKABLE);
+        lv_obj_set_user_data(btn,(void *)(intptr_t)1);
+        lv_obj_add_event_cb(btn, pageIndicator_navigate_event_cb, LV_EVENT_CLICKED, NULL);
+
       }
       lv_obj_set_size(btn, 150, lv_pct(100));
       lv_obj_remove_style(btn, NULL, LV_STATE_PRESSED);

Platformio/src/applicationInternal/gui/guiMemoryOptimizer.h

@@ -2,3 +2,5 @@
 
 void gui_memoryOptimizer_prepare_startup();
 void gui_memoryOptimizer_doAfterSliding_deletionAndCreation(lv_obj_t** tabview, int oldTabID, int newTabID, bool newGuiList, lv_obj_t** panel, lv_obj_t** img1, lv_obj_t** img2);
+bool gui_memoryOptimizer_isTabIDInMemory(u_int8_t tabID);
+bool gui_memoryOptimizer_isGUInameInMemory(std::string guiName);

Platformio/src/applicationInternal/scenes/sceneHandler.cpp

@@ -1,6 +1,7 @@
 #include <string>
 #include <lvgl.h>
 #include "applicationInternal/gui/guiBase.h"
+#include "applicationInternal/gui/guiMemoryOptimizer.h"
 #include "applicationInternal/scenes/sceneRegistry.h"
 #include "applicationInternal/hardware/hardwarePresenter.h"
 #include "applicationInternal/commandHandler.h"
@@ -29,6 +30,28 @@ void handleScene(uint16_t command, commandData commandData, std::string addition
     return;
   }
 
+  // do not switch scene, but navigate to the prev or next gui in the currently active list of guis
+  if ((scene_name == scene_gui_next) || (scene_name == scene_gui_prev)) {
+    if (scene_name == scene_gui_prev) {
+      if (currentTabID == 0) {
+        Serial.println("scene: cannot navigate to prev gui, because there is none");
+      } else {
+        Serial.println("scene: will navigate to prev gui");
+        setActiveTab(currentTabID -1, LV_ANIM_ON, true);
+      }
+
+    } else if (scene_name == scene_gui_next) {
+      if (!gui_memoryOptimizer_isTabIDInMemory(currentTabID +1)) {
+        Serial.println("scene: cannot navigate to next gui, because there is none");
+      } else {
+        Serial.println("scene: will navigate to next gui");
+        setActiveTab(currentTabID +1, LV_ANIM_ON, true);
+      }
+
+    }
+    return;
+  }
+
   // check if we know the new scene
   if (!sceneExists(scene_name)) {
     Serial.printf("scene: cannot start scene %s, because it is unknown\r\n", scene_name.c_str());

Platformio/src/scenes/scene__default.cpp

@@ -14,6 +14,10 @@
 
 uint16_t SCENE_SELECTION;
 std::string scene_name_selection = "sceneSelection";
+uint16_t GUI_PREV;
+uint16_t GUI_NEXT;
+std::string scene_gui_prev = "GUI_prev";
+std::string scene_gui_next = "GUI_next";
 
 std::map<char, repeatModes> key_repeatModes_default;
 std::map<char, uint16_t> key_commands_short_default;
@@ -44,7 +48,7 @@ void register_scene_defaultKeys(void) {
   /*{KEY_STOP,  COMMAND_UNKNOWN  },    {KEY_REWI,  COMMAND_UNKNOWN  },    {KEY_PLAY,  COMMAND_UNKNOWN  },    {KEY_FORW,  COMMAND_UNKNOWN  },*/
   /*{KEY_CONF,  COMMAND_UNKNOWN  },                                                                          {KEY_INFO,  COMMAND_UNKNOWN  },*/
                                                      /*  {KEY_UP,    COMMAND_UNKNOWN  },*/
-                   /* {KEY_LEFT,  COMMAND_UNKNOWN  },    {KEY_OK,    COMMAND_UNKNOWN  },    {KEY_RIGHT, COMMAND_UNKNOWN  },*/
+                      {KEY_LEFT,  GUI_PREV  },       /*  {KEY_OK,    COMMAND_UNKNOWN  },*/  {KEY_RIGHT, GUI_NEXT  },
                                                      /*  {KEY_DOWN,  COMMAND_UNKNOWN  },*/
     {KEY_BACK,  SCENE_SELECTION  },                                                                        /*{KEY_SRC,   COMMAND_UNKNOWN  },*/
     {KEY_VOLUP, YAMAHA_VOL_PLUS  },                      {KEY_MUTE,  YAMAHA_MUTE_TOGGLE},                  /*{KEY_CHUP,  COMMAND_UNKNOWN  },*/
@@ -57,6 +61,8 @@ void register_scene_defaultKeys(void) {
   
   };
 
-  register_command(&SCENE_SELECTION     , makeCommandData(SCENE, {scene_name_selection}));
+  register_command(&SCENE_SELECTION, makeCommandData(SCENE, {scene_name_selection}));
+  register_command(&GUI_PREV       , makeCommandData(SCENE, {scene_gui_prev}));
+  register_command(&GUI_NEXT       , makeCommandData(SCENE, {scene_gui_next}));
 
 }

Platformio/src/scenes/scene__default.h

@@ -7,7 +7,11 @@
 #include "applicationInternal/scenes/sceneRegistry.h"
 
 extern uint16_t SCENE_SELECTION;          // command
-extern std::string scene_name_selection;  // name of this fake default scene
+extern std::string scene_name_selection;  // payload: name of this fake default scene
+extern uint16_t GUI_PREV;                 // command
+extern uint16_t GUI_NEXT;                 // command
+extern std::string scene_gui_prev;        // payload: name of this fake scene
+extern std::string scene_gui_next;        // payload: name of this fake scene
 
 extern std::map<char, repeatModes> key_repeatModes_default;
 extern std::map<char, uint16_t> key_commands_short_default;