// Fig. 4.27: DrawLinesController.java
// Using strokeLine to connect the corners of a canvas.
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;

public class DrawLinesController { 
   @FXML private Canvas canvas; // used to get the GraphicsContext

   // when user presses Draw Lines button, draw two Lines in the Canvas 
   @FXML
   void drawLinesButtonPressed(ActionEvent event) {
      // get the GraphicsContext, which is used to draw on the Canvas
      GraphicsContext gc = canvas.getGraphicsContext2D();

      // draw line from upper-left to lower-right corner
      gc.strokeLine(0, 0, canvas.getWidth(), canvas.getHeight());

      // draw line from upper-right to lower-left corner
      gc.strokeLine(canvas.getWidth(), 0, 0, canvas.getHeight());
   }
}

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