Multiple canvas navigation help
Hi all
I'm developing a form with multiple canvases like A,B,C and D
I'm able to navigate to the canvases successfully during run time by having some go_item code
B-->D-->C-->A
i don't want to navigate like this
my need is if I close any the canvas B,C and D during runtime the control should be navigate to canvas A and the form won't be closed
my problem is
If i close any canvas during runtime the entire form is closed
Help me!!
Note:Is there any possibility to have a separate window for each canvas? If it so then how to code in the when-window-closed trigger for navigating between those multiple windows
Hi user2233
Here is an example ...
Pls create a button in ur tab or content canvas (A) in this button pls write the following as an example...
SHOW_VIEW('STACKED_CANVAS');
GO_ITEM ('SAL'); -- Pls note this item should be navigable and visible in ur stacked canvas form
HIDE_VIEW('TAB_CANVAS'); -- or canvas (A)
In order to return back to ur tab_canvas pls create a button in this button pls write the following...
HIDE_VIEW('STACKED_CANVAS');
SHOW_VIEW('TAB_CANVAS'); -- or canvas (A)
GO_BLOCK('EMP');
GO_ITEM ('EMPNO'); -- Pls note this item should be navigable and visible in ur stacked canvas form
Hope this helps...
Regards,
Abdetu...
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No error but nothing come out. Please help!
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class StGeorgeFlag extends Applet implements ActionListener{ //, MouseListener, MouseMotionListener{
Panel p;
MyCanvas mycanvas;
PlayButton play;
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SolutionButton solution;
Dimension d;
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int width = getSize().width;
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play = new PlayButton(this);
confirm = new ConfirmButton(this);
solution = new SolutionButton(this);
add(play);
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p.setLayout(new GridLayout(1,4,3,3));
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p.add(confirm);
p.add(solution);
setLayout(new BorderLayout(3,3)); // button border
add("Center",mycanvas); // add canvas and controls to the applet
add("South",p);
public void actionPerformed(ActionEvent e){
if (e.getSource() == play) mycanvas.rectangle();
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public void mouseReleased(MouseEvent me){}
public void mouseClicked(MouseEvent me){}
public void mouseEntered(MouseEvent me){}
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int height = d.height;
g.setColor(Color.red);
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g.drawString("========" , width/5,height/3+20);
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g.drawString("- divide diagonal by 2 to find the mid point" , width/5,(height/3)+60);
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SolutionButton(StGeorgeFlag sgf) {
super("Solution");
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} // end class SolutionButtonNewJava wrote:
No error Not sure that I agree with this. I get an NPE when I try to run this.
but nothing come out. Please help!You're declaring your MyCanvas object twice, once in the class, and once in the init method, and only construct the second of the two. Declare this object only once -- in the class, and construct this same object once, and you're program will be closer to completion:
Change this:
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public void init()
int width = getSize().width;
int height = getSize().height;
p = new Panel();
setBackground(Color.lightGray);
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MyCanvas mycanvas;
public void init()
int width = getSize().width;
int height = getSize().height;
p = new Panel();
setBackground(Color.lightGray);
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mycanvas = new MyCanvas(); // create the canvas
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