JApplet is not working?
Hi, I am designing a gui which contains a Jslider, a JCombox and polygons.
but nothing can't be seen. No compile errors.
I guess it's the structure problem.
Any advice, THANKS.
import java.io.*;
import java.util.List;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.ListIterator;
import java.util.Scanner;
import java.awt.Font;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.BasicStroke;
import java.awt.GradientPaint;
import java.awt.geom.GeneralPath;
import java.awt.AlphaComposite;
import java.awt.Composite;
import java.awt.geom.*;
import java.awt.*;
import java.awt.BorderLayout;
import javax.swing.*;
import java.util.Hashtable;
import java.awt.event.*;
import javax.swing.event.*;
publicclass Comboxextends JApplet
{
finalint TRANSITION = 100;// Transition x,y coordinates of cells.
privatedouble x1, y1, x2, y2;// to plot lines from (x1,y1) to (x2,y2)
privatedouble xCells[][];// Every cell's points's x coordinates array
privatedouble yCells[][];// Every cell's points's y coordinates array
//private double rgb[][]; // Color red, green, blue for each point in each cell
private LayoutManager Layout;
private Container Panel;
private Drawing drawing;
privatedouble red[][];
privatedouble green[][];
privatedouble blue[][];
private String energyId[];
privateint sideId;
privateint sidesTotalNumber;// Total sides number for all cells
privateint rgbLength;// Total rgb color group number for all cells at each point
privateint cellsPointsNumber[];// point numbers of each cell.(each cell has how many points)
privateint numberofCells;
privateint numberofsets;
privateint id;//PlotEnergyId
privatedouble lineWidth;
double scale = 1.0;
private String currentPattern;
private JSlider dJSlider;
private JComboBox comb;
publicvoid ComboBoxDemo(){
Layout =new BorderLayout ();
getDrawingData();
scaleData();
currentPattern = energyId[0];
JLabel patternLabel1 =new JLabel("Select one set");
comb =new JComboBox(energyId);
drawing =new Drawing();
Panel = getContentPane();
Panel.setLayout (Layout);
Panel.add (comb, BorderLayout.SOUTH);
Panel.add(dJSlider, BorderLayout.EAST);
drawing.setBackground (Color.white);
drawing.setSize (600, 600);
comb.setEditable(false);
//comb.addActionListener(this);
comb.setForeground (Color.red);
comb.setBackground (Color.yellow);
comb.add(patternLabel1);
comb.setAlignmentX(Component.LEFT_ALIGNMENT);
comb.addActionListener(
new ActionListener()// anonymous inner class
{
publicvoid actionPerformed(ActionEvent e)
{
JComboBox cb = (JComboBox)e.getSource();
id = cb.getSelectedIndex();
}
}
);
SliderFrame();
Panel.add (drawing,"Center");
//setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
}
publicvoid SliderFrame()
{
int min = 1, max = 16, inc = 5;
dJSlider =new JSlider(min, max, 6);
dJSlider.setMajorTickSpacing(5);
dJSlider.setMinorTickSpacing(1);
dJSlider.setSnapToTicks(true);
dJSlider.setLabelTable(getLabelTable(min, max, inc));
dJSlider.setPaintTicks(true);
dJSlider.setPaintLabels(true);
dJSlider.addChangeListener(
new ChangeListener()// anonymous inner class
// handle change in slider value
{
publicvoid stateChanged(ChangeEvent e)
{
int value = ((JSlider)e.getSource()).getValue();
scale = (value+4)/10.0;
}
}
);
add(dJSlider,BorderLayout.EAST);// ADD Slider
}
private Hashtable getLabelTable(int min,int max,int inc){
Hashtable<Integer, JLabel> table =new Hashtable<Integer, JLabel>();
for(int j = min; j <= max; j+=inc){
String s = String.format("%.1f", (j+4)/10.0);
table.put(Integer.valueOf(j),new JLabel(s));
}
return table;
}
private AlphaComposite makeComposite(float alpha)
{
int type = AlphaComposite.SRC_OVER;
return(AlphaComposite.getInstance(type, alpha));
}
publicvoid getDrawingData()
{
TestCell p =new TestCell();
p.cellNumber();
numberofCells = p.getnumberofCells();
numberofsets = p.getnumberofsets();
xCells =newdouble[numberofCells][];
yCells =newdouble[numberofCells][];
for(int i = 0; i<numberofCells; i++)
{
xCells[i] =newdouble[numberofsets];// maximum points in ith cell
yCells[i] =newdouble[numberofsets];// maximum points in ith cell
}
cellsPointsNumber =newint[numberofCells];
red =newdouble[numberofCells][];
green =newdouble[numberofCells][];
blue =newdouble[numberofCells][];
for(int i=0; i><numberofCells; i++)
{
red[i]=newdouble[numberofsets];
green[i] =newdouble[numberofsets];
blue[i] =newdouble[numberofsets];
}
energyId =new String[numberofsets];
p.cellData();
p.energyId();
p.rgbs();
xCells = p.getxCells();
yCells = p.getyCells();
sidesTotalNumber = p.getsidesTotalNumber();
// rgb = p.getrgb();
red = p.getred();
green = p.getgreen();
blue = p.getblue();
energyId = p.getenergyId();
cellsPointsNumber = p.getcellsPointsNumber();//array: each cell has how many points
rgbLength = p.getrgbLength();
}
publicvoid scaleData()
{
for(int i = 0; i >< numberofCells; i++)
{
for(int j = 0; j<cellsPointsNumber[i]; j++)
{
xCells[i][j] = (xCells[i][j])*scale+TRANSITION;
yCells[i][j] = (yCells[i][j])*scale+TRANSITION;
}
}
}
publicvoid drawSides(Graphics2D g2d)
{
g2d.setColor(Color.GRAY);
g2d.setStroke(new BasicStroke((float)lineWidth));
for (int i = 0; i><numberofCells; i++)
{
for (int j = 0; j><cellsPointsNumber[i]-1; j++)
{
x1 = xCells[i][j];
y1 = yCells[i][j];
x2 = xCells[i][j+1];
y2 = yCells[i][j+1];
Line2D line =new Line2D.Double(x1,y1,x2,y2);
g2d.draw(line);// draw Sidess here
}
}
}
publicvoid drawPolygon(Graphics2D g2d)
{
for (int i = 0; i><numberofCells; i++)
{
Polygon poly =new Polygon();
float r = (float)red[i][id];
// red for ith cell,id is from 0 to numberofsets-1
// if id=0, means "Mixture"
float g = (float)green[i][id];// green for ith cell
float b = (float)blue[i][id];// blue for ith cell
List><Integer> xList =new ArrayList<Integer>();
List<Integer> yList =new ArrayList<Integer>();
for (int j = 0; j<cellsPointsNumber[i]; j++)
{
xList.add((int)(xCells[i][j]));
yList.add((int)(yCells[i][j]));
}
Integer[] x = xList.toArray(new Integer[xList.size()]);
Integer[] y = yList.toArray(new Integer[yList.size()]);
for (int s = 0; s><xList.size(); s++)
{
poly.addPoint(x[s],y[s]);
}
g2d.setColor(new Color(r, g, b));// transparent drawing
g2d.fillPolygon(poly);
}
}
class Drawingextends JPanel
{
publicvoid paintComponent(Graphics g)
{
//super.paintComponent( g ); // call superclass's paint method
//this.setBackground( Color.WHITE );
Graphics2D g2d = (Graphics2D)g;// cast g to Graphics 2D
getDrawingData();
ComboBoxDemo();
repaint();
drawPolygon(g2d);
//Composite originalComposite = g2d.getComposite();
//g2d.setColor(Color.GRAY);
drawSides(g2d);
g2d.setComposite(makeComposite(1.0f));
// g2d.setComposite(originalComposite);
}
// end method paintComponent
}
}// end class
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