Question
For Lab 2, you're modifying the Dots and DotsPanel classes from your text to make a simple Paint program. Modify the program to I have
For Lab 2, you're modifying the Dots and DotsPanel classes from your text to make a simple Paint program. Modify the program to
I have no clue how to do this part please help!
- Paint with continuous dots by adding a MouseMotionListener that adds points to the pointsList when the mouseDragged event is triggered.
this is what i have so far!
//Dots.java //by Aaron Velazquez //CSCI 1302 //Lab# 2 //01/30/20
package paintDots;
import javax.swing.JFrame;
public class Dots {
public static void main(String[] args) { // TODO Auto-generated method stub JFrame frame = new JFrame("Dots"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new DotsPanel());
frame.pack(); frame.setVisible(true);
}
}
===========================================================
//DotsPanel.java //by Aaron Velazquez //CSCI 1302 //Lab# 2 //01/30/20
package paintDots;
import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import javax.swing.JPanel; import java.awt.Point; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.security.SecureRandom; import java.util.ArrayList;
public class DotsPanel extends JPanel {
private final int SIZE = 6; // radius of each dot
private ArrayList
//----------------------------------------------------------------- // Constructor: Sets up this panel to listen for mouse events. //----------------------------------------------------------------- public DotsPanel() { pointList = new ArrayList
addMouseListener (new DotsListener());
setBackground(Color.black); setPreferredSize(new Dimension(300, 200)); }
//----------------------------------------------------------------- // Draws all of the dots stored in the list. //----------------------------------------------------------------- public void paint(Graphics page){ super.paintComponent(page); SecureRandom randomNum = new SecureRandom(); Color color = new Color(randomNum.nextInt(256),randomNum.nextInt(256),randomNum.nextInt(256)); page.setColor(color);
for (Point spot : pointList) page.fillOval(spot.x-SIZE, spot.y-SIZE, SIZE*2, SIZE*2);
page.drawString("Count of points: " + pointList.size(), 5, 15); }
//***************************************************************** // Represents the listener for mouse events. //***************************************************************** private class DotsListener implements MouseListener { //-------------------------------------------------------------- // Adds the current point to the list of points and redraws // the panel whenever the mouse button is pressed. //-------------------------------------------------------------- public void mousePressed(MouseEvent event) { pointList.add(event.getPoint()); repaint(); }
//-------------------------------------------------------------- // Provide empty definitions for unused event methods. //-------------------------------------------------------------- public void mouseClicked(MouseEvent event) {} public void mouseReleased(MouseEvent event) {} public void mouseEntered(MouseEvent event) {} public void mouseExited(MouseEvent event) {} } }
How can i paint with continuous dots when i drag the mouse?
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