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Canvas won`t paint
Joined: 17 Apr 2004
Posts: 28
Canvas won`t paint
I recently had to trash the Battle.java file on the game I`m working on
and restart it from scratch. It inherits from Canvas and is added to
the content pane in another class based on JFrame. I haven`t made any
significant changes to the JFrame, but now my Canvas won`t show up. Can
anyone help me find the problem? Is there something I`m missing? I`ve
pasted the code for both classes below...
-Michael Sullivan-
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MainBattle extends JFrame
{
public static Battle battle;
public MainBattle()
{
this.setSize(600, 600);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.show();
Ally us[] = new Ally[4];
us[0] = new Ally(0, "Michael");
us[1] = new Ally(1, "Fox");
us[2] = new Ally(3, "Fawn");
us[3] = new Ally(4, "Sierra");
AllyParty party = new AllyParty(us);
Container pane = getContentPane();
battle = new Battle(party);
pane.add(battle);
setContentPane(pane);
this.addKeyListener(battle);
// battle.doBattle();
}
public static void main(String args[])
{ new MainBattle(); }
}
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
class Battle extends Canvas implements KeyListener
{
AllyParty ap;
boolean showMenu = false;
EnemyParty ep;
Image allyPic[], enemyPic[];
int enemyCount;
int turn[];
Random rand;
public Battle (AllyParty allyparty)
{
/*Initial Canvas subclass setup*/
setSize(600, 600);
setBackground(Color.black);
/*Create our ally party*/
ap = new AllyParty();
ap = allyparty;
/*Create randomizer and random number variable*/
long seed = System.currentTimeMillis();
rand = new Random(seed);
/*Use rand to select a number of enemies*/
enemyCount = rand.nextInt(12) + 1;
enemyCount = 12; //TEMP
ep = new EnemyParty(enemyCount);
/*Create the individual enemies in ep and place them*/
for (int i = 0; i < enemyCount; i++)
ep.enemy[i] = new Enemy(1);
/*Initialize images and set them to their starting values*/
allyPic = new Image[4];
enemyPic = new Image[enemyCount];
for (int i = 0; i < 4; i++)
allyPic[i] = ap.ally[i].getStandPic();
for (int i = 0; i < enemyCount; i++)
enemyPic[i] = ep.enemy[i].getImage();
/*Set battle placement*/
ap.setPos(0);
ep.setPos(0);
/*Temporary Section*/
findTurns();
findActions();
repaint();
}
public void findTurns()
{
int total = ep.getEnemyCount() + 4; //Enemies + allies
int used[] = new int[total];
turn = new int[total];
int next = rand.nextInt(total);
for (int j = 0; j < total; j++)
used[j] = -1;
for (int j = 0; j < total; j++)
{
for (int k = 0; k < j; k++)
{
if (used[k] == next)
{
k = -1;
next = rand.nextInt(total);
}
}
turn[j] = next;
used[j] = next;
}
}
public void findActions()
{
int total = ep.getEnemyCount() + 4;
for (int i = 0; i < total; i++)
{
if (turn[i] < 4) //Ally
{
if (ap.ally[i].isDead() == false) //They`re alive
{
showMenu = true;
while (showMenu == true)
{
try { Thread.sleep(200); } catch (Exception e) {}
}
}
}
}
}
public void paint(Graphics g)
{
for (int i = 0; i < 4; i++)
g.drawImage(allyPic[i], ap.ally[i].getXPos(),
ap.ally[i].getYPos(), this);
for (int i = 0; i < enemyCount; i++)
g.drawImage(enemyPic[i], ep.enemy[i].getXPos(),
ep.enemy[i].getYPos(), this);
}
public void keyPressed (KeyEvent k) {}
public void keyReleased (KeyEvent k) {}
public void keyTyped (KeyEvent k) {}
}
Joined: 16 Apr 2004
Posts: 15
Canvas won`t paint
Michael,
No matter what anyone tells you :), you should never mix awt and swing.
Even it it works sometimes, or works for a while - it`s gonna break at
some point. Especially when it comes to painting things.
I would try changing JFrame to Frame and add battle straight instead of
adding it to the content pane of the JFrame. That should do it.
Thanx,
- Kalman
>>> michael@... 4/21/2004 4:02:32 PM >>>
I recently had to trash the Battle.java file on the game I`m working
on
and restart it from scratch. It inherits from Canvas and is added to
the content pane in another class based on JFrame. I haven`t made any
significant changes to the JFrame, but now my Canvas won`t show up.
Can
anyone help me find the problem? Is there something I`m missing?
I`ve
pasted the code for both classes below...
-Michael Sullivan-
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MainBattle extends JFrame
{
public static Battle battle;
public MainBattle()
{
this.setSize(600, 600);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.show();
Ally us[] = new Ally[4];
us[0] = new Ally(0, "Michael");
us[1] = new Ally(1, "Fox");
us[2] = new Ally(3, "Fawn");
us[3] = new Ally(4, "Sierra");
AllyParty party = new AllyParty(us);
Container pane = getContentPane();
battle = new Battle(party);
pane.add(battle);
setContentPane(pane);
this.addKeyListener(battle);
// battle.doBattle();
}
public static void main(String args[])
{ new MainBattle(); }
}
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
class Battle extends Canvas implements KeyListener
{
AllyParty ap;
boolean showMenu = false;
EnemyParty ep;
Image allyPic[], enemyPic[];
int enemyCount;
int turn[];
Random rand;
public Battle (AllyParty allyparty)
{
/*Initial Canvas subclass setup*/
setSize(600, 600);
setBackground(Color.black);
/*Create our ally party*/
ap = new AllyParty();
ap = allyparty;
/*Create randomizer and random number variable*/
long seed = System.currentTimeMillis();
rand = new Random(seed);
/*Use rand to select a number of enemies*/
enemyCount = rand.nextInt(12) + 1;
enemyCount = 12; //TEMP
ep = new EnemyParty(enemyCount);
/*Create the individual enemies in ep and place them*/
for (int i = 0; i < enemyCount; i++)
ep.enemy[i] = new Enemy(1);
/*Initialize images and set them to their starting values*/
allyPic = new Image[4];
enemyPic = new Image[enemyCount];
for (int i = 0; i < 4; i++)
allyPic[i] = ap.ally[i].getStandPic();
for (int i = 0; i < enemyCount; i++)
enemyPic[i] = ep.enemy[i].getImage();
/*Set battle placement*/
ap.setPos(0);
ep.setPos(0);
/*Temporary Section*/
findTurns();
findActions();
repaint();
}
public void findTurns()
{
int total = ep.getEnemyCount() + 4; //Enemies + allies
int used[] = new int[total];
turn = new int[total];
int next = rand.nextInt(total);
for (int j = 0; j < total; j++)
used[j] = -1;
for (int j = 0; j < total; j++)
{
for (int k = 0; k < j; k++)
{
if (used[k] == next)
{
k = -1;
next = rand.nextInt(total);
}
}
turn[j] = next;
used[j] = next;
}
}
public void findActions()
{
int total = ep.getEnemyCount() + 4;
for (int i = 0; i < total; i++)
{
if (turn[i] < 4) //Ally
{
if (ap.ally[i].isDead() == false) //They`re alive
{
showMenu = true;
while (showMenu == true)
{
try { Thread.sleep(200); } catch (Exception e) {}
}
}
}
}
}
public void paint(Graphics g)
{
for (int i = 0; i < 4; i++)
g.drawImage(allyPic[i], ap.ally[i].getXPos(),
ap.ally[i].getYPos(), this);
for (int i = 0; i < enemyCount; i++)
g.drawImage(enemyPic[i], ep.enemy[i].getXPos(),
ep.enemy[i].getYPos(), this);
}
public void keyPressed (KeyEvent k) {}
public void keyReleased (KeyEvent k) {}
public void keyTyped (KeyEvent k) {}
}
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Joined: 17 Apr 2004
Posts: 28
Canvas won`t paint
The reason MainBattle is a JFrame is because I made a swing interface
that contained Text and Combo boxes to allow the user to create a custom
party and I got tired of going through the selection process every time
I wanted to test battle. Is there a swing substitute for Canvas? Could
I use a JPanel instead???
-Michael Sullivan-
On Wed, 2004-04-21 at 15:09, Kalman Hazins (2) wrote:
> Michael,
>
> No matter what anyone tells you :), you should never mix awt and
> swing.
> Even it it works sometimes, or works for a while - it`s gonna break at
> some point. Especially when it comes to painting things.
>
> I would try changing JFrame to Frame and add battle straight instead
> of
> adding it to the content pane of the JFrame. That should do it.
>
> Thanx,
> - Kalman
>
> >>> michael@... 4/21/2004 4:02:32 PM >>>
> I recently had to trash the Battle.java file on the game I`m working
> on
> and restart it from scratch. It inherits from Canvas and is added to
> the content pane in another class based on JFrame. I haven`t made any
> significant changes to the JFrame, but now my Canvas won`t show up.
> Can
> anyone help me find the problem? Is there something I`m missing?
> I`ve
> pasted the code for both classes below...
>
> -Michael Sullivan-
>
> import java.awt.*;
> import java.awt.event.*;
> import javax.swing.*;
>
> public class MainBattle extends JFrame
> {
> public static Battle battle;
> public MainBattle()
> {
> this.setSize(600, 600);
> this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
> this.show();
>
>
> Ally us[] = new Ally[4];
> us[0] = new Ally(0, "Michael");
> us[1] = new Ally(1, "Fox");
> us[2] = new Ally(3, "Fawn");
> us[3] = new Ally(4, "Sierra");
>
> AllyParty party = new AllyParty(us);
> Container pane = getContentPane();
> battle = new Battle(party);
> pane.add(battle);
> setContentPane(pane);
> this.addKeyListener(battle);
> // battle.doBattle();
> }
>
>
> public static void main(String args[])
> { new MainBattle(); }
>
> }
>
>
> import java.awt.*;
> import java.awt.event.*;
> import java.util.*;
> import javax.swing.*;
>
> class Battle extends Canvas implements KeyListener
> {
> AllyParty ap;
>
> boolean showMenu = false;
>
> EnemyParty ep;
>
>
> Image allyPic[], enemyPic[];
>
> int enemyCount;
> int turn[];
>
> Random rand;
>
> public Battle (AllyParty allyparty)
> {
>
> /*Initial Canvas subclass setup*/
> setSize(600, 600);
> setBackground(Color.black);
>
> /*Create our ally party*/
> ap = new AllyParty();
> ap = allyparty;
>
> /*Create randomizer and random number variable*/
> long seed = System.currentTimeMillis();
> rand = new Random(seed);
>
> /*Use rand to select a number of enemies*/
> enemyCount = rand.nextInt(12) + 1;
>
> enemyCount = 12; //TEMP
> ep = new EnemyParty(enemyCount);
>
> /*Create the individual enemies in ep and place them*/
> for (int i = 0; i < enemyCount; i++)
> ep.enemy[i] = new Enemy(1);
>
>
> /*Initialize images and set them to their starting values*/
> allyPic = new Image[4];
> enemyPic = new Image[enemyCount];
>
> for (int i = 0; i < 4; i++)
> allyPic[i] = ap.ally[i].getStandPic();
>
> for (int i = 0; i < enemyCount; i++)
> enemyPic[i] = ep.enemy[i].getImage();
>
> /*Set battle placement*/
> ap.setPos(0);
> ep.setPos(0);
>
>
>
> /*Temporary Section*/
> findTurns();
> findActions();
>
> repaint();
> }
>
> public void findTurns()
> {
> int total = ep.getEnemyCount() + 4; //Enemies + allies
>
> int used[] = new int[total];
> turn = new int[total];
>
> int next = rand.nextInt(total);
>
> for (int j = 0; j < total; j++)
> used[j] = -1;
>
> for (int j = 0; j < total; j++)
> {
> for (int k = 0; k < j; k++)
> {
> if (used[k] == next)
> {
> k = -1;
> next = rand.nextInt(total);
> }
> }
>
> turn[j] = next;
> used[j] = next;
>
> }
> }
>
> public void findActions()
> {
> int total = ep.getEnemyCount() + 4;
>
> for (int i = 0; i < total; i++)
> {
> if (turn[i] < 4) //Ally
> {
> if (ap.ally[i].isDead() == false) //They`re alive
> {
> showMenu = true;
> while (showMenu == true)
> {
> try { Thread.sleep(200); } catch (Exception e) {}
> }
> }
> }
> }
> }
>
>
> public void paint(Graphics g)
> {
> for (int i = 0; i < 4; i++)
> g.drawImage(allyPic[i], ap.ally[i].getXPos(),
> ap.ally[i].getYPos(), this);
>
> for (int i = 0; i < enemyCount; i++)
> g.drawImage(enemyPic[i], ep.enemy[i].getXPos(),
> ep.enemy[i].getYPos(), this);
>
> }
>
>
> public void keyPressed (KeyEvent k) {}
> public void keyReleased (KeyEvent k) {}
> public void keyTyped (KeyEvent k) {}
> }
>
>
>
>
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Joined: 16 Apr 2004
Posts: 15
Canvas won`t paint
Absolutely!!!
JPanel is the swing equivalent of Canvas. But ...
1) The method is not paint though - it`s paintComponent() for JPanel
2) The first line of paintComponent should be this
Graphics2D g2 = (Graphics2D)g;
Frome there on - use g2 and not g.
You might need to change some more stuff.
This link should be very helpful -
http://webdev.apl.jhu.edu/~rbe/java/Java_2D/index_files/frame.html
Enjoy,
- Kalman
>>> michael@... 4/21/2004 4:21:19 PM >>>
The reason MainBattle is a JFrame is because I made a swing interface
that contained Text and Combo boxes to allow the user to create a
custom
party and I got tired of going through the selection process every
time
I wanted to test battle. Is there a swing substitute for Canvas?
Could
I use a JPanel instead???
-Michael Sullivan-
On Wed, 2004-04-21 at 15:09, Kalman Hazins (2) wrote:
> Michael,
>
> No matter what anyone tells you :), you should never mix awt and
> swing.
> Even it it works sometimes, or works for a while - it`s gonna break
at
> some point. Especially when it comes to painting things.
>
> I would try changing JFrame to Frame and add battle straight instead
> of
> adding it to the content pane of the JFrame. That should do it.
>
> Thanx,
> - Kalman
>
> >>> michael@... 4/21/2004 4:02:32 PM >>>
> I recently had to trash the Battle.java file on the game I`m working
> on
> and restart it from scratch. It inherits from Canvas and is added
to
> the content pane in another class based on JFrame. I haven`t made
any
> significant changes to the JFrame, but now my Canvas won`t show up.
> Can
> anyone help me find the problem? Is there something I`m missing?
> I`ve
> pasted the code for both classes below...
>
> -Michael Sullivan-
>
> import java.awt.*;
> import java.awt.event.*;
> import javax.swing.*;
>
> public class MainBattle extends JFrame
> {
> public static Battle battle;
> public MainBattle()
> {
> this.setSize(600, 600);
> this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
> this.show();
>
>
> Ally us[] = new Ally[4];
> us[0] = new Ally(0, "Michael");
> us[1] = new Ally(1, "Fox");
> us[2] = new Ally(3, "Fawn");
> us[3] = new Ally(4, "Sierra");
>
> AllyParty party = new AllyParty(us);
> Container pane = getContentPane();
> battle = new Battle(party);
> pane.add(battle);
> setContentPane(pane);
> this.addKeyListener(battle);
> // battle.doBattle();
> }
>
>
> public static void main(String args[])
> { new MainBattle(); }
>
> }
>
>
> import java.awt.*;
> import java.awt.event.*;
> import java.util.*;
> import javax.swing.*;
>
> class Battle extends Canvas implements KeyListener
> {
> AllyParty ap;
>
> boolean showMenu = false;
>
> EnemyParty ep;
>
>
> Image allyPic[], enemyPic[];
>
> int enemyCount;
> int turn[];
>
> Random rand;
>
> public Battle (AllyParty allyparty)
> {
>
> /*Initial Canvas subclass setup*/
> setSize(600, 600);
> setBackground(Color.black);
>
> /*Create our ally party*/
> ap = new AllyParty();
> ap = allyparty;
>
> /*Create randomizer and random number variable*/
> long seed = System.currentTimeMillis();
> rand = new Random(seed);
>
> /*Use rand to select a number of enemies*/
> enemyCount = rand.nextInt(12) + 1;
>
> enemyCount = 12; //TEMP
> ep = new EnemyParty(enemyCount);
>
> /*Create the individual enemies in ep and place them*/
> for (int i = 0; i < enemyCount; i++)
> ep.enemy[i] = new Enemy(1);
>
>
> /*Initialize images and set them to their starting values*/
> allyPic = new Image[4];
> enemyPic = new Image[enemyCount];
>
> for (int i = 0; i < 4; i++)
> allyPic[i] = ap.ally[i].getStandPic();
>
> for (int i = 0; i < enemyCount; i++)
> enemyPic[i] = ep.enemy[i].getImage();
>
> /*Set battle placement*/
> ap.setPos(0);
> ep.setPos(0);
>
>
>
> /*Temporary Section*/
> findTurns();
> findActions();
>
> repaint();
> }
>
> public void findTurns()
> {
> int total = ep.getEnemyCount() + 4; //Enemies + allies
>
> int used[] = new int[total];
> turn = new int[total];
>
> int next = rand.nextInt(total);
>
> for (int j = 0; j < total; j++)
> used[j] = -1;
>
> for (int j = 0; j < total; j++)
> {
> for (int k = 0; k < j; k++)
> {
> if (used[k] == next)
> {
> k = -1;
> next = rand.nextInt(total);
> }
> }
>
> turn[j] = next;
> used[j] = next;
>
> }
> }
>
> public void findActions()
> {
> int total = ep.getEnemyCount() + 4;
>
> for (int i = 0; i < total; i++)
> {
> if (turn[i] < 4) //Ally
> {
> if (ap.ally[i].isDead() == false) //They`re alive
> {
> showMenu = true;
> while (showMenu == true)
> {
> try { Thread.sleep(200); } catch (Exception e) {}
> }
> }
> }
> }
> }
>
>
> public void paint(Graphics g)
> {
> for (int i = 0; i < 4; i++)
> g.drawImage(allyPic[i], ap.ally[i].getXPos(),
> ap.ally[i].getYPos(), this);
>
> for (int i = 0; i < enemyCount; i++)
> g.drawImage(enemyPic[i], ep.enemy[i].getXPos(),
> ep.enemy[i].getYPos(), this);
>
> }
>
>
> public void keyPressed (KeyEvent k) {}
> public void keyReleased (KeyEvent k) {}
> public void keyTyped (KeyEvent k) {}
> }
>
>
>
>
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>
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______________________________________________________________________
> Yahoo! Groups Links
> * To visit your group on the web, go to:
> http://groups.yahoo.com/group/beginnersclub/
>
> * To unsubscribe from this group, send an email to:
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