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Thread: Tell me the Problem in that java Applet

  1. #1
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    Lightbulb Tell me the Problem in that java Applet

    I have made an Applet in java for a paint application.
    In which i can use rect, oval, etc.

    Here's my code.....
    package drawit;
     
     
    import java.awt.*;
    import java.applet.*;
    import java.awt.event.*;
     
    /*<applet code="drawit1" width=1000 height=600></applet>*/
     
     
    public class Drawit1 extends Applet implements ItemListener,AdjustmentListener,ActionListener,MouseListener,MouseMotionListener {
     
     
    	Button red,yellow,white,black,orange,blue,magenta,gray,green,user,cyan,darkgray,pink;
    	Button fillrect,rect,oval,filloval,pen,brush,polygon;
    	Panel buttonPanel,imagePanel,toolPanel;
    	Color xorcolor,maincolor;
    	Scrollbar r,g,b;
    	TextField rt,gt,bt;
    	String shape,color,getx,gety;
    	Choice brushchoice,brushsize;
    	int mouseX,mouseY,initialX,initialY,height,width,i,j,mainX,mainY;
    	boolean t=true;
     
    	public void init() {
     
    //		setLayout(new GridLayout(2,1,10,10));
    		setLayout(new BorderLayout());
    		//***********************************Button Declaration Only*******************************************
     
    		red=new Button("Red");
    		yellow=new Button("Yellow");
    		cyan=new Button("Cyan");
    		black=new Button("Black");
    	    blue=new Button("Blue");
    		orange=new Button("Orange");
    		white=new Button("White");
    		magenta=new Button("Magenta");
    		gray=new Button("Gray");
    		green=new Button("Green");
    		pink=new Button("Pink");
    		darkgray=new Button("Dark Gray");
    		user=new Button("Custom");
    		filloval=new Button("FILL OVAL");
    		fillrect=new Button("FILL RECT");
    		rect=new Button("RECT");
    		oval=new Button("OVAL");
    		pen=new Button("PEN");
    		brush=new Button("BRUSH");
     
     
    		red.setBackground(Color.red);
    		yellow.setBackground(Color.yellow);
    		white.setBackground(Color.white);
    		black.setBackground(Color.black);
    		blue.setBackground(Color.blue);
    		magenta.setBackground(Color.magenta);
    		gray.setBackground(Color.gray);
    		pink.setBackground(Color.PINK);
    		green.setBackground(Color.GREEN);
    		darkgray.setBackground(Color.DARK_GRAY);
    		orange.setBackground(Color.orange);
    		cyan.setBackground(Color.CYAN);
    		black.setForeground(Color.WHITE);
    		darkgray.setForeground(Color.white);
    	//	user.setBackground(Color.BLACK);
     
    		r=new Scrollbar(Scrollbar.HORIZONTAL,0,0,0,256);
    		b=new Scrollbar(Scrollbar.HORIZONTAL,0,0,0,256);
    		g=new Scrollbar(Scrollbar.HORIZONTAL,0,0,0,256);
     
    		rt=new TextField("0");
    		bt=new TextField("0");
    		gt=new TextField("0");
    		rt.setEditable(false);
    		bt.setEditable(false);
    		gt.setEditable(false);
     
    		brushchoice=new Choice();
    		brushsize=new Choice();
     
    		buttonPanel=new Panel();
    		toolPanel=new Panel();
    		imagePanel=new Panel();
     
    		buttonPanel.setLayout(new GridLayout(12,2,0,0));
    		buttonPanel.setBackground(Color.blue);
    		imagePanel.setBackground(Color.white);
    		toolPanel.setBackground(Color.gray);
    		//****************Adding Component********************
     
     
    		buttonPanel.add(cyan);
    		buttonPanel.add(yellow);
    		buttonPanel.add(black);
    		buttonPanel.add(gray);
    		buttonPanel.add(pink);
    		buttonPanel.add(blue);
    		buttonPanel.add(darkgray);
    		buttonPanel.add(green);
    		buttonPanel.add(orange);
    		buttonPanel.add(white);
    		buttonPanel.add(magenta);
    		buttonPanel.add(user);
    		buttonPanel.add(fillrect);
    		buttonPanel.add(filloval);
    		buttonPanel.add(rect);
    		buttonPanel.add(oval);
    		buttonPanel.add(pen);
    		buttonPanel.add(brush);
    		buttonPanel.add(r);
    		buttonPanel.add(rt);
    		buttonPanel.add(g);
    		buttonPanel.add(gt);
    		buttonPanel.add(b);
    		buttonPanel.add(bt);
     
     
    	//	this.add(new GridLayout(1,1,0,0));
    	//	this.add(new GridLayout(1,2,0,0));
     
     
     
    		this.add(buttonPanel,BorderLayout.WEST);
    		this.add(imagePanel,BorderLayout.CENTER);
    		this.add(toolPanel,BorderLayout.NORTH);
     
     
     
    		//********************LISTENER FOR ALL OBJECTS****************************
    		r.addAdjustmentListener(this);
    		b.addAdjustmentListener(this);
    		g.addAdjustmentListener(this);
    		imagePanel.addMouseMotionListener(this);
    		imagePanel.addMouseListener(this);
    		red.addActionListener(this);
    		cyan.addActionListener(this);
    		yellow.addActionListener(this);
    		black.addActionListener(this);
    		darkgray.addActionListener(this);
    		blue.addActionListener(this);
    		pink.addActionListener(this);
    		green.addActionListener(this);
    		orange.addActionListener(this);
    		magenta.addActionListener(this);
    		white.addActionListener(this);
    		gray.addActionListener(this);
    		user.addActionListener(this);
    		oval.addActionListener(this);
    		filloval.addActionListener(this);
    		fillrect.addActionListener(this);
    		rect.addActionListener(this);
    		pen.addActionListener(this);
    		brush.addActionListener(this);
     
     
     
     
    	}
     
     
    	public void itemStateChanged(ItemEvent ie)
     
    	{
    		repaint();
    	}
    	public void adjustmentValueChanged(AdjustmentEvent ae)
    	{
    		if(ae.getSource()==r)
    		{
    			rt.setText(r.getValue()+"");
    		}
    		if(ae.getSource()==b)
    		{
    			bt.setText(b.getValue()+"");
    		}
    		if(ae.getSource()==g)
    		{
    			gt.setText(g.getValue()+"");
    		}
    		user.setBackground(new Color(r.getValue(),g.getValue(),b.getValue()));
     
    		repaint();
    	}
     
    	public void mouseClicked(MouseEvent me){
     
     
     
    		}
     
    	public void mouseEntered(MouseEvent me){}
     
    	public void mouseReleased(MouseEvent me){
    		t=true;
    		Graphics g=imagePanel.getGraphics();
    		g.setColor(maincolor);
     
    			switch(i)
    		{
    			case 1:g.drawOval(mainX,mainY,width,height);break;
    			case 2:g.drawRect(mainX,mainY,width,height);break;
    			case 3:g.fillRect(mainX,mainY,width,height);break;
    			case 4:g.fillOval(mainX,mainY,width,height);break;
    			case 5:break;
    			case 6:break;
     
    		}
    		}
     
     
    	public void mouseDragged(MouseEvent me){
     
    		switch(i)
    		{
    			case 1:drawoval(me);break;
    			case 2:drawrect(me);break;
    			case 3:fillrect(me);break;
    			case 4:filloval(me);break;
    			case 5:drawpen(me);break;
    			case 6:drawbrush(me);break;
     
    		}
     
     
     
    		}
     
     
     
    	public void mouseExited(MouseEvent me){
    		getx="---";
    		gety="---";
    		repaint();
    		}
     
    	public void mouseMoved(MouseEvent me){
    		getx=me.getX()+"";
    		gety=me.getY()+"";
    		//repaint();
    		}
     
    	public void mousePressed(MouseEvent me){
    	}
     
    	public void actionPerformed(ActionEvent ae){
     
    		if(ae.getSource()==red)
    		{
    		maincolor=Color.red;
    		color="RED";	
    		}
    		if(ae.getSource()==yellow)
    		{
    		maincolor=Color.yellow;
    		color="YELLOW";	
    		}
    		if(ae.getSource()==green)
    		{
    		maincolor=Color.green;
    		color="Green";	
    		}
    		if(ae.getSource()==cyan)
    		{
    		maincolor=Color.cyan;
    		color="CYAN";	
    		}
    		if(ae.getSource()==black)
    		{
    		maincolor=Color.black;
    		color="BLACK";	
    		}
    		if(ae.getSource()==pink)
    		{
    		maincolor=Color.pink;
    		color="PINK";	
    		}
    		if(ae.getSource()==blue)
    		{
    		maincolor=Color.blue;
    		color="BLUE";	
    		}
    		if(ae.getSource()==magenta)
    		{
    		maincolor=Color.magenta;
    		color="MAGENTA";	
    		}
    		if(ae.getSource()==orange)
    		{
    		maincolor=Color.orange;
    		color="ORANGE";	
    		}
    		if(ae.getSource()==green)
    		{
    		maincolor=Color.green;
    		color="GREEN";	
    		}
    		if(ae.getSource()==gray)
    		{
    		maincolor=Color.gray;
    		color="GRAY";	
    		}
    		if(ae.getSource()==darkgray)
    		{
    		maincolor=Color.DARK_GRAY;
    		color="DARK GRAY";	
    		}
    		if(ae.getSource()==white)
    		{
    		maincolor=Color.white;
    		color="WHITE";	
    		}
    		if(ae.getSource()==user)
    		{
    		maincolor=new Color(r.getValue(),g.getValue(),b.getValue());
    		color="CUSTOM";	
    		}
    		if(ae.getSource()==oval)
    		{
    		//here shape will be defined
    		shape="OVAL";
    		i=1;	
    		}
    		if(ae.getSource()==rect)
    		{
    		//here shape will be defined
    		shape="RECTANGLE";	
    		i=2;
    		}
    		if(ae.getSource()==fillrect)
    		{
    		//here shape will be defined
    		shape="FILLED RECTANGLE";	
    		i=3;
    		}
    		if(ae.getSource()==filloval)
    		{
    		//here shape will be defined
    		shape="FILLED OVAL";	
    		i=4;
    		}
    		if(ae.getSource()==pen)
    		{
    		//here shape will be defined
    		shape="PEN";	
    		i=5;
    		}
    		if(ae.getSource()==brush)
    		{
    		//here shape will be defined
    		shape="BRUSH";	
    		i=6;
    		}
     
     
    		}
     
     
     
    	public void setBoundary(MouseEvent me)
    	{
     
    		if(t)
    		{
    			initialX=me.getX();
    			initialY=me.getY();
    			height=0;width=0;
    			t=false;
    		}
     
     
     
     
    		mouseX=me.getX();
    		mouseY=me.getY();
    		if(mouseX<initialX || mouseY<initialY)
    		{
    			if(mouseX<initialX)
    			{
    				width=initialX-mouseX;
    				mainX=initialX-width;
    			}
    			else
    			{
    				width=mouseX-initialX;
    				mainX=initialX;
    			}
    			if(mouseY<initialY)
    			{
    				height=initialY-mouseY;
    				mainY=initialY-height;
    			}
    			else
    			{
    				height=mouseY-initialY;
    				mainY=initialY;
    			}
     
    		}
    		else
    		{
    			height=mouseY-initialY;
    			width=mouseX-initialX;
    			mainX=initialX;
    			mainY=initialY;
    		}
    	}
     
        public void drawoval(MouseEvent me){
     
        	Graphics g=imagePanel.getGraphics();
     
        		g.setColor(maincolor);
       			g.setXORMode(Color.white);
         		g.drawOval(mainX,mainY,width,height);
          		setBoundary(me);
     			g.drawOval(mainX,mainY,width,height);
     
        	}
     
        public void drawrect(MouseEvent me){
        		Graphics g=imagePanel.getGraphics();
     
        		g.setColor(maincolor);
       			g.setXORMode(new Color(255,255,255));
         		g.drawRect(mainX,mainY,width,height);
          		setBoundary(me);
     			g.drawRect(mainX,mainY,width,height);
     			}
     
        public void fillrect(MouseEvent me){
        		Graphics g=imagePanel.getGraphics();
     
        		g.setColor(maincolor);
       			g.setXORMode(Color.white);
         		g.fillRect(mainX,mainY,width,height);
          		setBoundary(me);
     			g.fillRect(mainX,mainY,width,height);
        	}
     
        public void filloval(MouseEvent me){
     
        		Graphics g=imagePanel.getGraphics();
        		g.setColor(maincolor);
       			g.setXORMode(Color.white);
         		g.fillOval(mainX,mainY,width,height);
          		setBoundary(me);
     			g.fillOval(mainX,mainY,width,height);
        	}
     
        public void drawpen(MouseEvent me){}
     
        public void drawbrush(MouseEvent me){}
     
     
     
    	//public void paint(Graphics g) {
    		//update(g);
    		//g.drawString("Welcome to Java!!", 50, 60 );
    	//showStatus("Shape: "+shape +"    Color: "+color+"    Cursor: X:"+getx+" Y:"+gety);
    	//}
    }
    In this applet i have a problem that when i draw a OVAL it will draw without any problem.
    But when i draw another OVAL then last OVAL shape disappear.


    And second problem is that...
    When i Draw a OVAL shape and then select Rectangle by buttons
    then As i clicked on image to draw rectangle then last OVAL shape is automatically surrounded by a Rectangle.

    I don't what the both problem is.
    That's by i didn't complete that applet


    I'm waiting for ur reply.
    Please must tell me the solution.
    Last edited by maz3r; August 20th, 2012 at 09:08 AM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Tell me the Problem in that java Applet

    Please edit you post and change the quote tags to code tags. The posted code is hard to read without the proper formatting.
    But when i draw another OVAL then last OVAL shape disappear.
    You get a fresh graphics context every time the paint method is called.
    You need to save a list of what shapes you want drawn for the paint method to be able to "remember" the shapes drawn before.

    The above may not apply to your code because you are not using the paint method.
    But you should be.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Tell me the Problem in that java Applet

    Thank you very much...
    But my problem is solved without using any paint method..

    Actually i missed to use a function in which all the integer variables are set to default mouse location..

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: Tell me the Problem in that java Applet

    Have you solved your problem?

    Please Edit your post and wrap your code with
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  5. #5
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    Default Re: Tell me the Problem in that java Applet

    Yes, I have solved my problem.

  6. #6
    Super Moderator copeg's Avatar
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    Default Re: Tell me the Problem in that java Applet

    Thread moved from Whats wrong with my code.

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