lcd_menu.cpp

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#include "lcd_menu.h"
#include "esphome/core/log.h"
#include <algorithm>
 
namespace esphome::lcd_menu {
 
static const char *const TAG = "lcd_menu";
 
void LCDCharacterMenuComponent::setup() {
  if (this->display_->is_failed()) {
    this->mark_failed();
    return;
  }
 
  display_menu_base::DisplayMenuComponent::setup();
}
 
float LCDCharacterMenuComponent::get_setup_priority() const { return setup_priority::PROCESSOR - 1.0f; }
 
void LCDCharacterMenuComponent::dump_config() {
  ESP_LOGCONFIG(TAG,
                "LCD Menu\n"
                "  Columns: %u, Rows: %u\n"
                "  Mark characters: %02x, %02x, %02x, %02x",
                this->columns_, this->rows_, this->mark_selected_, this->mark_editing_, this->mark_submenu_,
                this->mark_back_);
  if (this->is_failed()) {
    ESP_LOGE(TAG, "The connected display failed, the menu is disabled!");
  }
}
 
void LCDCharacterMenuComponent::draw_item(const display_menu_base::MenuItem *item, uint8_t row, bool selected) {
  char data[this->columns_ + 1];  // Bounded to 65 through the config
 
  memset(data, ' ', this->columns_);
 
  if (selected) {
    data[0] = (this->editing_ || (this->mode_ == display_menu_base::MENU_MODE_JOYSTICK && item->get_immediate_edit()))
                  ? this->mark_editing_
                  : this->mark_selected_;
  }
 
  switch (item->get_type()) {
    case display_menu_base::MENU_ITEM_MENU:
      data[this->columns_ - 1] = this->mark_submenu_;
      break;
    case display_menu_base::MENU_ITEM_BACK:
      data[this->columns_ - 1] = this->mark_back_;
      break;
    default:
      break;
  }
 
  auto text = item->get_text();
  size_t n = std::min(text.size(), (size_t) this->columns_ - 2);
  memcpy(data + 1, item->get_text().c_str(), n);
 
  if (item->has_value()) {
    std::string value = item->get_value_text();
 
    // Maximum: start mark, at least two chars of label, space, '[', value, ']',
    // end mark. Config guarantees columns >= 12
    size_t val_width = std::min((size_t) this->columns_ - 7, value.length());
    memcpy(data + this->columns_ - val_width - 4, " [", 2);
    memcpy(data + this->columns_ - val_width - 2, value.c_str(), val_width);
    data[this->columns_ - 2] = ']';
  }
 
  data[this->columns_] = '\0';
 
  this->display_->print(0, row, data);
}
 
}  // namespace esphome::lcd_menu