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💬Chat App | ESP32 + ESP-NOW + LVGL7 | Part 1/2 - LVGL UI Layout

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Eric
2020-09-22 15:26:15 -07:00
parent a9ad0a1558
commit e82042a6d1
1 changed files with 248 additions and 0 deletions
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ESP32_LVGL/ChatApp_LVGL7/Step_1_UI/Step_1_UI.ino Normal file
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#include "WiFi.h"
#include <lvgl.h>
#include <TFT_eSPI.h>
TFT_eSPI tft = TFT_eSPI();
int screenWidth = 320;
int screenHeight = 480;
static lv_color_t buf[LV_HOR_RES_MAX * LV_VER_RES_MAX / 10];
static lv_disp_buf_t disp_buf;
/* LVGL objects */
static lv_obj_t * bg_top;
static lv_obj_t * bg_middle;
static lv_obj_t * bg_bottom;
static lv_obj_t * bg_keyboard;
static lv_obj_t * kb;
static lv_obj_t * kb_ta;
static lv_obj_t * label_status;
static lv_obj_t * fake_ta;
static lv_obj_t * page;
static lv_obj_t * table;
int itemIdx;
/* Display flushing */
void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
{
uint16_t c;
tft.startWrite(); /* Start new TFT transaction */
tft.setAddrWindow(area->x1, area->y1, (area->x2 - area->x1 + 1), (area->y2 - area->y1 + 1)); /* set the working window */
for (int y = area->y1; y <= area->y2; y++) {
for (int x = area->x1; x <= area->x2; x++) {
c = color_p->full;
tft.writeColor(c, 1);
color_p++;
}
}
tft.endWrite(); /* terminate TFT transaction */
lv_disp_flush_ready(disp); /* tell lvgl that flushing is done */
}
bool my_touchpad_read(lv_indev_drv_t * indev_driver, lv_indev_data_t * data)
{
uint16_t touchX, touchY;
bool touched = tft.getTouch(&touchX, &touchY, 600);
if(!touched)
{
return false;
}
if(touchX>screenWidth || touchY > screenHeight)
{
Serial.println("Y or y outside of expected parameters..");
Serial.print("y:");
Serial.print(touchX);
Serial.print(" x:");
Serial.print(touchY);
}
else
{
data->state = touched ? LV_INDEV_STATE_PR : LV_INDEV_STATE_REL;
data->point.x = touchX;
data->point.y = touchY;
}
return false; /*Return `false` because we are not buffering and no more data to read*/
}
void setup() {
Serial.begin(115200);
xTaskCreate(guiTask,
"gui",
4096*2,
NULL,
2,
NULL);
}
void loop() {}
void guiTask(void *pvParameters) {
lv_init();
tft.begin();
tft.setRotation(2);
uint16_t calData[5] = { 295, 3493, 320, 3602, 2 };
tft.setTouch(calData);
lv_disp_buf_init(&disp_buf, buf, NULL, LV_HOR_RES_MAX * LV_VER_RES_MAX / 10);
lv_disp_drv_t disp_drv;
lv_disp_drv_init(&disp_drv);
disp_drv.hor_res = screenWidth;
disp_drv.ver_res = screenHeight;
disp_drv.flush_cb = my_disp_flush;
disp_drv.buffer = &disp_buf;
lv_disp_drv_register(&disp_drv);
lv_indev_drv_t indev_drv;
lv_indev_drv_init(&indev_drv); /*Descriptor of a input device driver*/
indev_drv.type = LV_INDEV_TYPE_POINTER; /*Touch pad is a pointer-like device*/
indev_drv.read_cb = my_touchpad_read; /*Set your driver function*/
lv_indev_drv_register(&indev_drv); /*Finally register the driver*/
lv_main();
while (1) {
lv_task_handler();
}
}
static void lv_main(){
lv_obj_t * scr = lv_obj_create(NULL, NULL);
lv_scr_load(scr);
bg_top = lv_obj_create(scr, NULL);
lv_obj_clean_style_list(bg_top, LV_OBJ_PART_MAIN);
lv_obj_set_style_local_bg_opa(bg_top, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_OPA_COVER);
lv_obj_set_style_local_bg_color(bg_top, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_COLOR_YELLOW);
lv_obj_set_size(bg_top, LV_HOR_RES, 30);
label_status = lv_label_create(bg_top, NULL);
lv_label_set_long_mode(label_status, LV_LABEL_LONG_SROLL_CIRC);
lv_obj_set_width(label_status, LV_HOR_RES - 20);
lv_label_set_text(label_status, "TOP STATUS");
lv_obj_align(label_status, NULL, LV_ALIGN_CENTER, 0, 0);
bg_middle = lv_obj_create(scr, NULL);
lv_obj_clean_style_list(bg_middle, LV_OBJ_PART_MAIN);
lv_obj_set_style_local_bg_opa(bg_middle, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_OPA_COVER);
lv_obj_set_style_local_bg_color(bg_middle, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_COLOR_WHITE);
lv_obj_set_pos(bg_middle, 0, 30);
lv_obj_set_size(bg_middle, LV_HOR_RES, 400);
bg_bottom = lv_obj_create(scr, NULL);
lv_obj_clean_style_list(bg_bottom, LV_OBJ_PART_MAIN);
lv_obj_set_style_local_bg_opa(bg_bottom, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_OPA_COVER);
lv_obj_set_style_local_bg_color(bg_bottom, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_COLOR_ORANGE);
lv_obj_set_pos(bg_bottom, 0, 430);
lv_obj_set_size(bg_bottom, LV_HOR_RES, 50);
fake_ta = lv_textarea_create(bg_bottom, NULL);
lv_textarea_set_text(fake_ta, "Enter a message");
lv_obj_set_pos(fake_ta, 0, 0);
lv_obj_set_size(fake_ta, LV_HOR_RES, 50);
lv_obj_set_event_cb(fake_ta, fake_ta_event_handler);
bg_keyboard = lv_obj_create(scr, NULL);
lv_obj_clean_style_list(bg_bottom, LV_OBJ_PART_MAIN);
lv_obj_set_style_local_bg_opa(bg_keyboard, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_OPA_COVER);
lv_obj_set_style_local_bg_color(bg_keyboard, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_COLOR_WHITE);
lv_obj_set_pos(bg_keyboard, 0, LV_VER_RES - (LV_VER_RES / 2 + 40) );
lv_obj_set_size(bg_keyboard, LV_HOR_RES, LV_VER_RES / 2 + 40);
lv_page();
makeKeyboard();
}
static void lv_page(void)
{
page = lv_page_create(bg_middle, NULL);
lv_obj_clean_style_list(page, LV_OBJ_PART_MAIN);
lv_obj_set_size(page, LV_HOR_RES, 400);
lv_obj_set_pos(page, 0, 0);
//lv_page_set_edge_flash(page, true);
itemIdx = 0;
table = lv_table_create(page, NULL);
lv_obj_clean_style_list(table, LV_OBJ_PART_MAIN);
lv_table_set_col_cnt(table, 2);
lv_obj_set_pos(table, 0, 0);
lv_obj_set_click(table, false);
}
static void fake_ta_event_handler(lv_obj_t * obj, lv_event_t event)
{
if(event == LV_EVENT_CLICKED) {
lv_obj_move_foreground(bg_keyboard);
lv_obj_set_height(page, 180);
scrollToEndOfTable();
}
}
static void scrollToEndOfTable(){
float tableHeight = lv_obj_get_height(table);
printf("tableHeight: %f\n", tableHeight);
lv_page_scroll_ver(page, -tableHeight);
}
static void updateBottomStatus(lv_color_t color, String text){
lv_obj_set_style_local_bg_color(bg_top, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,color);
lv_label_set_text(label_status, text.c_str());
}
static void makeKeyboard(){
kb_ta = lv_textarea_create(bg_keyboard, NULL);
lv_obj_set_size(kb_ta, LV_HOR_RES, 40);
lv_obj_set_pos(kb_ta, 0, 0);
lv_textarea_set_text(kb_ta, "");
kb = lv_keyboard_create(bg_keyboard, NULL);
lv_obj_set_size(kb, LV_HOR_RES, LV_VER_RES / 2);
lv_obj_set_pos(kb, 0, 40);
lv_keyboard_set_cursor_manage(kb, true);
lv_keyboard_set_textarea(kb, kb_ta);
lv_obj_set_event_cb(kb, keyboard_event_cb);
lv_obj_move_background(bg_keyboard);
}
static void keyboard_event_cb(lv_obj_t * kb, lv_event_t event){
lv_keyboard_def_event_cb(kb, event);
if(event == LV_EVENT_APPLY){
lv_obj_move_background(bg_keyboard);
lv_obj_set_height(page, 400);
updateTable(true, lv_textarea_get_text(kb_ta));
scrollToEndOfTable();
lv_textarea_set_text(kb_ta, "");
}else if(event == LV_EVENT_CANCEL){
lv_obj_move_background(bg_keyboard);
lv_obj_set_height(page, 400);
}
}
static void updateTable(bool isMine, String msg){
msg.trim();
if(msg.length() > 0){
lv_table_set_row_cnt(table, (itemIdx+1));
lv_table_set_col_width(table, itemIdx, LV_HOR_RES/2);
lv_table_set_cell_align(table, itemIdx, isMine? 1 : 0, isMine? LV_LABEL_ALIGN_RIGHT : LV_LABEL_ALIGN_LEFT);
lv_table_set_cell_value(table, itemIdx, isMine? 1 : 0, msg.c_str());
itemIdx++;
scrollToEndOfTable();
}
}