package com.jsql.view.swing.text;
   
   import com.jsql.util.LogLevelUtil;
   import com.jsql.view.swing.util.UiUtil;
   import org.apache.logging.log4j.LogManager;
   import org.apache.logging.log4j.Logger;
   
   import javax.swing.*;
   import java.awt.*;
  
  /**
   * Textfield with information text displayed when empty.
   */
  public class JTextFieldPlaceholder extends JTextField {
      
      /**
       * Log4j logger sent to view.
       */
      private static final Logger LOGGER = LogManager.getRootLogger();
      
      /**
       * Text to display when empty.
       */
      private String placeholderText;
      
      /**
       * Create a textfield with hint and default value.
       * @param placeholder Text displayed when empty
       * @param value Default value
       */
      public JTextFieldPlaceholder(String placeholder, String value) {
          
          this(placeholder);
          this.setText(value);
      }
      
      /**
       * Create a textfield with hint.
       * @param placeholder Text displayed when empty
       */
      public JTextFieldPlaceholder(String placeholder) {
          this.placeholderText = placeholder;
      }
  
      @Override
      public void paint(Graphics g) {
          
          try {
              super.paint(g);
          } catch (ClassCastException e) {  // Fix #4301, ClassCastException: sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData
              LOGGER.log(LogLevelUtil.CONSOLE_JAVA, e, e);
          }
          
          if (this.getText().isEmpty()) {
              
              int h = this.getHeight();
              var fm = g.getFontMetrics();
  
              UiUtil.drawPlaceholder(this, g, this.placeholderText, h / 2 + fm.getAscent() / 2 - 1);
          }
      }
  
      public void setPlaceholderText(String placeholderText) {
          this.placeholderText = placeholderText;
      }
  }