bad flicker on applet drawing
iv never drawn images using java befor and seam to be getting quite bad flicker when images r changing like flashing / been updated
i have main applet class that has a thread that calls these methods
below is my code for drawing images
what am i doing wrong to cause this nasty flicker im guessing its auto redrawing the whole screen or some thing every time some image changing
it does not need to redraw the background images at all just the images on top that are changing
any idea what im doing wrong or better way to code this thanks
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.applet.*;
import java.io.*;
publicclass drawSlot{
private Applet parrentapp;
int id = 0;
intoffset = 93;
JLabel imageLabel;
ImageIcon ImageIcon;
JLabel imageLabel0;
ImageIcon ImageIcon3;
JLabel imageLabel3;
ImageIcon ImageIcon4;
JLabel imageLabel4;
ImageIcon ImageIcon0;
ImageIcon[][] ImageIcon1;
JLabel[][] imageLabel1;
ImageIcon[] ImageIcon2;
JLabel[] imageLabel2;
JLabel bank =new JLabel("000.00");
JLabel credit =new JLabel("00.00");
JLabel status =new JLabel("null");
InputStream is = getClass().getResourceAsStream("LCD-BOLD.TTF");
public drawSlot(Applet parrent,int maxSlots,int idx){
parrentapp = parrent;
id = idx;
ImageIcon1 =new ImageIcon[9][4];
imageLabel1 =new JLabel[9][4];
ImageIcon2 =new ImageIcon[2];
imageLabel2 =new JLabel[2];
Font font =null;
try{
font = Font.createFont(Font.TRUETYPE_FONT, is);
}catch (Exception e){
e.printStackTrace();
}
Font font0 = font.deriveFont(26.0f);
Font font1 = font.deriveFont(18.0f);
// slot overlay
ImageIcon4 =new ImageIcon(parrentapp.getImage(parrentapp.getCodeBase(),"Images/slotoverlay.png"));
imageLabel4 =new JLabel(ImageIcon4);
imageLabel4.setBounds(187*id, offset, 187, 288);
parrentapp.add(imageLabel4);
// bank display
bank.setBounds((187*id)+56, 5+offset ,100, 50);
bank.setFont(font0);
bank.setForeground(Color.red);
parrentapp.add(bank);
// credit display
credit.setBounds((187*id)+123, 31+offset ,100, 50);
credit.setFont(font1);
credit.setForeground(Color.red);
parrentapp.add(credit);
// status
status.setBounds((187*id)+8, 251+offset ,200, 50);
status.setFont(new Font("Courier ", Font.PLAIN, 12));
//status.setForeground(Color.black);
parrentapp.add(status);
// reel overlay
ImageIcon3 =new ImageIcon(parrentapp.getImage(parrentapp.getCodeBase(),"Images/overlay.png"));
imageLabel3 =new JLabel(ImageIcon3);
imageLabel3.setBounds((187*id)+9, 230, 125, 72);
parrentapp.add(imageLabel3);
// reel symbols - 3 reels, 3 symbols per reel, 4 images per symbol
// 2,5,8
// 1,4,7
// 0,3,6
for (int i=0; i<9; i++){
for (int j=0; j<4; j++){
ImageIcon1[i][j] =new ImageIcon(parrentapp.getImage(parrentapp.getCodeBase(),"Images/symbol"+j+".GIF"));
imageLabel1[i][j] =new JLabel(ImageIcon1[i][j]);
parrentapp.add(imageLabel1[i][j]);
imageLabel1[i][j].setVisible(false);
switch (i){
case 0: imageLabel1[i][j].setBounds((187*id)+9, 278, 36, 24);break;
case 1: imageLabel1[i][j].setBounds((187*id)+9, 254, 36, 24);break;
case 2: imageLabel1[i][j].setBounds((187*id)+9, 230, 36, 24);break;
case 3: imageLabel1[i][j].setBounds((187*id)+53, 278, 36, 24);break;
case 4: imageLabel1[i][j].setBounds((187*id)+53, 254, 36, 24);break;
case 5: imageLabel1[i][j].setBounds((187*id)+53, 230, 36, 24);break;
case 6: imageLabel1[i][j].setBounds((187*id)+97, 278, 36, 24);break;
case 7: imageLabel1[i][j].setBounds((187*id)+97, 254, 36, 24);break;
case 8: imageLabel1[i][j].setBounds((187*id)+97, 230, 36, 24);break;
}
}
}
// reel spin effect
ImageIcon0 =new ImageIcon(parrentapp.getImage(parrentapp.getCodeBase(),"Images/spin.GIF"));
imageLabel0 =new JLabel(ImageIcon0);
imageLabel0.setBounds((187*id)+9, 230, 125, 72);
parrentapp.add(imageLabel0);
imageLabel0.setVisible(false);
// awards
for (int i=0; i<2; i++){
ImageIcon2[i] =new ImageIcon(parrentapp.getImage(parrentapp.getCodeBase(),"Images/award"+i+".gif"));
imageLabel2[i] =new JLabel(ImageIcon2[i]);
imageLabel2[i].setBounds((187*id)+17, 170, 114, 46);
parrentapp.add(imageLabel2[i]);
imageLabel2[i].setVisible(false);
}
// background
ImageIcon =new ImageIcon(parrentapp.getImage(parrentapp.getCodeBase(),"Images/slot.gif"));
imageLabel =new JLabel(ImageIcon);
imageLabel.setBounds(187*id, offset, 187, 288);
parrentapp.add(imageLabel);
parrentapp.setLayout(null);
}
//***************************
//*displayReels*
//***************************
publicvoid displayReels(int set,int pos,int [][]band){
// 0=O
// 1=X
// 2=Bar
// 3=Pot
switch (set){
case 0:
imageLabel1[0][band[0][(pos + 1) % band[0].length]].setVisible(true);
imageLabel1[1][band[0][pos]].setVisible(true);
imageLabel1[2][band[0][(pos + (band[0].length - 1)) % band[0].length]].setVisible(true);
break;
case 1:
imageLabel1[3][band[1][(pos + 1) % band[1].length]].setVisible(true);
imageLabel1[4][band[1][pos]].setVisible(true);
imageLabel1[5][band[1][(pos + (band[1].length - 1)) % band[1].length]].setVisible(true);
break;
case 2:
imageLabel1[6][band[2][(pos + 1) % band[2].length]].setVisible(true);
imageLabel1[7][band[2][pos]].setVisible(true);
imageLabel1[8][band[2][(pos + (band[2].length - 1)) % band[2].length]].setVisible(true);
break;
}
}
//***************************
//*clearReels*
//***************************
publicvoid clearReels(){
for (int i=0; i<9; i++){
for (int j=0; j<4; j++)
imageLabel1[i][j].setVisible(false);
}
}
//***************************
//*displaySpin*
//***************************
publicvoid displaySpinEffect(boolean onOff){
imageLabel0.setVisible(onOff);
}
//***************************
//*flashAward*
//***************************
publicvoid flashAward(int award,int amount,int delay){
for (int i = 0; i < amount; i++){
imageLabel2[award].setVisible(true);
try{
Thread.sleep(delay);
}catch(InterruptedException e){
}
imageLabel2[award].setVisible(false);
try{
Thread.sleep(delay);
}catch(InterruptedException e){
}
}
}
//***************************
//*lightAward*
//***************************
publicvoid lightAward(int award,boolean bothOff){
for (int i = 0; i < 2; i++)
imageLabel2[i].setVisible(false);
if(!bothOff)
imageLabel2[award].setVisible(true);
}
//***************************
//*setOverlay*
//***************************
publicvoid setOverlay(boolean onoff){
imageLabel4.setVisible(!onoff);
}
//***************************
//*displayCredit*
//***************************
publicvoid displayCredit(double value){
credit.setText(String.valueOf(value) +"0");
}
//***************************
//*displayBank*
//***************************
publicvoid displayBank(double value){
bank.setText(String.valueOf(value) +"0");
}
//***************************
//*displayBankClear*
//***************************
publicvoid displayBankClear(){
bank.setText("");
}
//***************************
//*displayStatus*
//***************************
publicvoid displayStatus(String statusx){
status.setText(statusx);
}
}
maxslots is the amout of THREADS
idx is the current id of the thread been drawing
using this info i can draw the image on the correct part of the screen
