How would I draw a grid? I mean something like this: http://img508.imageshack.us/img508/7054/javagriddr9.png (ignore the uneven spacing). Should I just draw a series of horizontal and vertical lines?
I'm tring to make a tile-map editor, and the tiles/map is split into pixels. Each box represents a pixel (zoomed in). The user can draw within the grid lines, individual pixels, etc.
Do you know how to override JPanels paintComponent method and use drawing tools? If not post back. Otherwise one way would be to:
for(int i = 0; i < num_gridlines; i++){
position = startpos + (i * distance)
gfx.drawLine(...)
}
http://java.sun.com/j2se/1.4.2/docs/api/java/awt/Graphics2D.html
> (Thanks for helping me!)
Woops! I forgot about this thread.
Well anyway, this is one way. There might be a better way.
Good luck!
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class GridPanelTest{
public static void main(String[] args){
new GridPanelTest();
}
public GridPanelTest(){
panel = new GridPanel();
frame = new JFrame();
frame.setContentPane(panel);
frame.setSize(500, 500);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public class GridPanel extends JPanel{
public GridPanel(){
this.setBackground(Color.WHITE);
}
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D gfx = (Graphics2D)g;
gfx.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
gfx.setStroke(thick);
gfx.setPaint(Color.RED);
for(int i = 0; i < numRows; i++){
int pos = (int)(((double)this.getHeight() / (double)numRows) * (double)i);
gfx.drawLine(0, pos, this.getWidth(), pos);
}
for(int j = 0; j < numColumns; j++){
int pos = (int)(((double)this.getWidth() / (double)numColumns) * (double)j);
gfx.drawLine(pos, 0, pos, this.getHeight());
}
}
int numRows = 4;
int numColumns = 3;
BasicStroke thick = new BasicStroke(2);
}
JFrame frame;
GridPanel panel;
}
