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Add Display::set_text.

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This commit is contained in:
Shaun Reed 2025-02-14 17:19:13 -05:00
parent ef7a027cf0
commit 046dfbb6e6
3 changed files with 41 additions and 18 deletions
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23
esp/cpp/07_lcd-panel/main/display.cpp
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@ -1,4 +1,5 @@
#include "display.h"
#include "widgets/label/lv_label.h"
#include <esp_log.h>
#include <esp_lcd_panel_ops.h>
@ -97,6 +98,28 @@ Display::Display(const I2C &i2c) :
nullptr, LVGL_TASK_PRIORITY, nullptr);
}
void Display::set_text(const char *text,
const char *name,
lv_label_long_mode_t long_mode,
lv_align_t align)
{
// Lock the mutex due to the LVGL APIs are not thread-safe.
ScopedLock lock;
ESP_LOGI(TAG, "Display LVGL Scroll Text");
lv_obj_t *scr = lv_display_get_screen_active(display_);
objects_[name] = lv_label_create(scr);
// Circular scroll
lv_label_set_long_mode(objects_[name], long_mode);
lv_label_set_text(objects_[name], text);
// Set the size of the screen.
// If you use rotation 90 or 270 use lv_display_get_vertical_resolution.
lv_obj_set_width(objects_[name],
lv_display_get_horizontal_resolution(display_));
lv_obj_align(objects_[name], align, 0, 0);
}
bool Display::lvgl_flush_ready(esp_lcd_panel_io_handle_t,
esp_lcd_panel_io_event_data_t *,
void *user_ctx)

9
esp/cpp/07_lcd-panel/main/display.h
View File

@ -5,9 +5,11 @@
#include <esp_lcd_panel_ssd1306.h>
#include <driver/i2c_types.h>
#include <driver/i2c_master.h>
#include <unordered_map>
#include "misc/lv_types.h"
#include "misc/lv_area.h"
#include "display/lv_display.h"
#include "widgets/label/lv_label.h"
#define I2C_BUS_PORT 0
#define LVGL_TICK_PERIOD_MS 5
@ -66,6 +68,11 @@ public:
[[nodiscard]] inline lv_display_t *operator*() { return get(); }
void set_text(const char *text,
const char *name,
lv_label_long_mode_t long_mode = LV_LABEL_LONG_SCROLL_CIRCULAR,
lv_align_t align = LV_ALIGN_TOP_MID);
static bool lvgl_flush_ready(esp_lcd_panel_io_handle_t panel,
esp_lcd_panel_io_event_data_t *data,
void *user_ctx);
@ -93,6 +100,8 @@ protected:
private:
// virtual void *vendor_config() = 0;
std::unordered_map<const char*, lv_obj_t*> objects_;
lv_display_t *display_;
void *vendor_config_;

27
esp/cpp/07_lcd-panel/main/main.cpp
View File

@ -1,31 +1,22 @@
#include "display.h"
#include "esp_log.h"
#include "lvgl.h"
I2C i2c;
void setup()
{
Display d(i2c);
// UI function scope.
{
// Lock the mutex due to the LVGL APIs are not thread-safe
ScopedLock lock;
d.set_text("Test test 12345678910",
"test-text1",
LV_LABEL_LONG_SCROLL,
LV_ALIGN_CENTER);
ESP_LOGI(TAG, "Display LVGL Scroll Text");
lv_obj_t *scr = lv_display_get_screen_active(d.get());
lv_obj_t *label = lv_label_create(scr);
// Circular scroll
lv_label_set_long_mode(label, LV_LABEL_LONG_SCROLL_CIRCULAR);
lv_label_set_text(label, "Hello hello hello hello hello hello hello.");
d.set_text("Hello hello hello hello hello hello hello hello!", "test-text2");
// Size of the screen
// if you use rotation 90 or 270 use lv_display_get_vertical_resolution
lv_obj_set_width(label, lv_display_get_horizontal_resolution(*d));
lv_obj_align(label, LV_ALIGN_TOP_MID, 0, 0);
}
d.set_text("A random sentence with no meaning at all.",
"test-text3",
LV_LABEL_LONG_CLIP,
LV_ALIGN_BOTTOM_MID);
}
void loop() { }