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import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Line2D;
import java.util.ArrayList;
import javax.swing.JComponent;
@SuppressWarnings("serial")
public class GraphComponent extends JComponent
{
private int leftMargin = 10;
private int rightMargin = 10;
private int topMargin = 10;
private int bottomMargin = 10;
private double largest;
private double largestX;
private double smallestX;
private double largestY;
private double smallestY;
private int numData;
private int width;
private int height;
private ArrayList<PairInterface<Double,Double>> data;
public GraphComponent(ArrayList<PairInterface<Double,Double>> aData)
{
data = aData;
numData = data.size();
PairInterface<Double,Double> tempData = data.get(0);
largestX = tempData.fst();
smallestX = largestX;
largestY = tempData.snd();
smallestY = largestY;
for(int i = 1; i < numData; i++)
{
tempData = data.get(i);
if(largestX < tempData.fst())
{
largestX = tempData.fst();
}
if(smallestX > tempData.fst())
{
smallestX = tempData.fst();
}
if(largestY < tempData.snd())
{
largestY = tempData.snd();
}
if(smallestY > tempData.snd())
{
smallestY = tempData.snd();
}
}
if(Math.abs(largestX) < Math.abs(smallestX))
{
largestX = Math.abs(smallestX);
}
else
{
largestX = Math.abs(largestX);
}
if(Math.abs(largestY) < Math.abs(smallestY))
{
largestY = Math.abs(smallestY);
}
else
{
largestY = Math.abs(largestY);
}
if(largestX > largestY)
{
largest = largestX;
}
else
{
largest = largestY;
}
}
public void paintComponent(Graphics g)
{
Graphics2D g2 = (Graphics2D) g;
width = this.getWidth();
height = this.getHeight();
Line2D.Double line = new Line2D.Double(0,0,0,0);
// Draw Axis;
g2.setColor(Color.BLACK);
line.setLine(getX(0),getY(0),getX(-largest),getY(0));
g2.draw(line);
line.setLine(getX(0),getY(0),getX(0),getY(largest));
g2.draw(line);
line.setLine(getX(0),getY(0),getX(largest),getY(0));
g2.draw(line);
line.setLine(getX(0),getY(0),getX(0),getY(-largest));
g2.draw(line);
// Draw frequency the graph
g2.setColor(Color.GREEN);
for(int i = 0; i < numData - 1; i++)
{
line.setLine(getX(data.get(i).fst()), getY(data.get(i).snd()), getX(data.get(i + 1).fst()), getY(data.get(i + 1).snd()));
g2.draw(line);
}
}
public int getX(double aValue)
{
int numberOfPixels = width - (leftMargin + rightMargin);
double range = largest + largest;
double deltaWidth = numberOfPixels / range;
return (int) ((aValue + largest) * deltaWidth) + leftMargin;
}
public int getY(double aValue)
{
int numberOfPixels = height - (topMargin + bottomMargin);
double range = largest + largest;
double deltaWidth = numberOfPixels / range;
return (int) ((-aValue + largest) * deltaWidth) + topMargin;
}
}
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