Edit: I'm a moron..
lol
I had the x, y values declared at 300, 300 for starting points when my frame was only 300x300 wide. So I realized what I did and redeclared the starting values (points) to x=1, y=1 or (1, 1, 300, 300) so that way the filled square would start at (1, 1) and continue from there. Derp! So now each time a new value is declared it rewrites over the old drawing and makes it seem as if a new template was used!
SUCESS!!!The corrected code is at the bottom of the page if you want to see where I screwed up. Took me all day to realize that dumb little mistake! DOH!
Ignore this: lolSo I have this problem with a program I am writing. It using a slider bar GUI to change the depths of a swimming pool. 1-3 feet for the shallow end and 4-10 feet for the deep end. If it draws one value, say 1' shallow x 5' deep, it works fine. The problem is I have to close out the program and re-run it if I want to draw another value because it will overlap. I.E. I will have multiple polygons going throughout my drawing. What code can I write to make it erase the lines or draw over everything with a blank background. Say white.
I have tried fillRect but it won't draw another rectangle everytime a new value is declared. How can I accomplish this?
Code
public void actionPerformed(ActionEvent event) {
Graphics paper = panel.getGraphics();
paper.setColor(Color.white);
paper.fillRect (300, 300, 300, 300);
panel.setBackground(Color.white);
Here is the entire program. The problem area is around where the paper.drawLine coding is.
Code
/**
* @(#)Pool.java
*
*
* @Anderson, Michael.
* @version 1.00 2013/2/13
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.*;
import java.io.*;
public class Pool extends JFrame implements
ActionListener, ChangeListener {
private JButton button;
private JPanel panel;
private Random random;
private JSlider sliderDeep, sliderShallow;
private JTextField volumeField, shallEnd, depEnd;
private JLabel shallowLabel, deepLabel, volumeLabel;
private int width = 50, length = 100;
//Width and length of the pool.
private int deepEnd = 4, shallowEnd = 1;
private int x = 50, y = 50;
//Where the x and y points starts. Upper, left edge of the pool.
//private int s1 = 300, s2 = 300;
public static void main (String[] args) {
Pool frame = new Pool();
frame.setSize(1200, 500);
frame.createGUI();
frame.setVisible(true);
}
private void createGUI() {
setDefaultCloseOperation(EXIT_ON_CLOSE);
Container window = getContentPane();
window.setLayout(new FlowLayout() );
random = new Random();
panel = new JPanel();
panel.setPreferredSize(new Dimension(300, 300));
panel.setBackground(Color.white);
window.add(panel);
depEnd = new JTextField(10);
window.add(depEnd);
shallowLabel = new JLabel("Shallow End: ");
window.add(shallowLabel);
sliderShallow = new JSlider(JSlider.HORIZONTAL, 1, 3, 1);
//Shallow end is from 1 to 3 feet deep, starting at 1 foot.
window.add(sliderShallow);
sliderShallow.addChangeListener(this);
deepLabel = new JLabel("Deep End: ");
window.add(deepLabel);
shallEnd = new JTextField(10);
window.add(shallEnd);
sliderDeep = new JSlider(JSlider.HORIZONTAL, 4, 10, 4);
//Deep end is from 4 to 10 feet deep, starting at 4 foot.
window.add(sliderDeep);
sliderDeep.addChangeListener(this);
button = new JButton("Draw Pool");
window.add(button);
button.addActionListener(this);
volumeLabel = new JLabel("Volume of pool pixels.: ");
window.add(volumeLabel);
volumeField = new JTextField(10);
window.add(volumeField);
}
/*
private void actionPerformed(ActionEvent event) {
Graphics paper = panel.getGraphics();
paper.fillRect (300, 300, s1, s2);
panel.setBackground(Color.white);
}
*/
public void actionPerformed(ActionEvent event) {
Graphics paper = panel.getGraphics();
paper.setColor(Color.white);
paper.fillRect (300, 300, 300, 300);
panel.setBackground(Color.white);
paper.setColor( Color.blue);
paper.drawLine (x, (y + (shallowEnd * 10)), x + 100, y + (deepEnd * 10));
//Slope of pool. (50, (50 + (value of shallowEnd * 10)), 50 + 100, 50 + (value of deepEnd * 10)); Returns point A (50,60) and point B (150,90).
//Yields the slop. The slop of the pool will vary from m=1/10 to m=9/10
paper.drawLine (x, y, x + 100, y);
//Horizon of pool. (50, 50, 50 + 100, 50); Point A (50,50) and point B (150, 50). Yields the horizontal line of the pool.
paper.drawLine (x, y, x, (y + (shallowEnd * 10)));
//Draws a vertical line for the left side of the pool.
paper.drawLine (x + 100, y, x + 100, (y + (deepEnd * 10)));
//Draws a vertical line for the right side of the pool.
}
public void stateChanged(ChangeEvent e) {
deepEnd = sliderDeep.getValue();
shallowEnd = sliderShallow.getValue();
double avg = (double)(((double)deepEnd + (double)shallowEnd)/2);
//Formula given by Mr. Farkas. (Decimal deepEnd + decimal shallowEnd)divided by 2 will yield the average.
double v = avg * width * length;
//Average from the above double (decimal) multiplied by width and length.
volumeField.setText(Double.toString(v));
//Using the variable v to be called by the string. v = Avg * W * L
shallEnd.setText(Integer.toString(deepEnd));
//Puts shallow end into correct textfield
depEnd.setText(Integer.toString(shallowEnd));
//Puts deep end into correct textfield
//Note all stuff in actionPerformed method could be copied and pasted int stateChanged
// - leaveing an empty actionPerformed method
//Left these notes as is.
}
}
The corrected code!Was originally written like this:
Code
public void actionPerformed(ActionEvent event) {
Graphics paper = panel.getGraphics();
paper.setColor(Color.white);
paper.fillRect (300, 300, 300, 300);
panel.setBackground(Color.white);
paper.setColor( Color.blue);
paper.drawLine (x, (y + (shallowEnd * 10)), x + 100, y + (deepEnd * 10));
//Slope of pool. (50, (50 + (value of shallowEnd * 10)), 50 + 100, 50 + (value of deepEnd * 10)); Returns point A (50,60) and point B (150,90).
//Yields the slop. The slop of the pool will vary from m=1/10 to m=9/10
paper.drawLine (x, y, x + 100, y);
//Horizon of pool. (50, 50, 50 + 100, 50); Point A (50,50) and point B (150, 50). Yields the horizontal line of the pool.
paper.drawLine (x, y, x, (y + (shallowEnd * 10)));
//Draws a vertical line for the left side of the pool.
paper.drawLine (x + 100, y, x + 100, (y + (deepEnd * 10)));
//Draws a vertical line for the right side of the pool.
}
Should be written as this: paper.fillRect (1, 1, 300, 300);
Code
public void actionPerformed(ActionEvent event) {
Graphics paper = panel.getGraphics();
paper.setColor(Color.white);
paper.fillRect (1, 1, 300, 300);
panel.setBackground(Color.white);
paper.setColor( Color.blue);
paper.drawLine (x, (y + (shallowEnd * 10)), x + 100, y + (deepEnd * 10));
//Slope of pool. (50, (50 + (value of shallowEnd * 10)), 50 + 100, 50 + (value of deepEnd * 10)); Returns point A (50,60) and point B (150,90).
//Yields the slop. The slop of the pool will vary from m=1/10 to m=9/10
paper.drawLine (x, y, x + 100, y);
//Horizon of pool. (50, 50, 50 + 100, 50); Point A (50,50) and point B (150, 50). Yields the horizontal line of the pool.
paper.drawLine (x, y, x, (y + (shallowEnd * 10)));
//Draws a vertical line for the left side of the pool.
paper.drawLine (x + 100, y, x + 100, (y + (deepEnd * 10)));
//Draws a vertical line for the right side of the pool.
}
This post was edited by NinjaSushi2 on Feb 14 2013 02:44pm