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Home » Eclipse Projects » Eclipse Platform » SWT: try to hide/show widgets without success(trying to use GridLayout to hide and show widgets without success)
SWT: try to hide/show widgets without success [message #780092] Tue, 17 January 2012 02:04 Go to next message
He Heng Huang is currently offline He Heng Huang
Messages: 4
Registered: January 2012
Junior Member
Newbi questions.

I laid the widgets in a 2 column gridlayout, and when user click a checkbox, I want to hide or show one line of the widgets. Tried many times, no success. Code as below:

BTW, are there any other methods to hide/show composites or other controls by using SSWT?

		Display display = new Display();
		final Shell shell = new Shell(display);
		shell.setText("Just for testing");
		GridLayout layout = new GridLayout(2, false);
		shell.setLayout(layout);
		
		Label label = new Label(shell, SWT.None);
		label.setText("User:");
		GridData data1 = new GridData(80, SWT.DEFAULT);
		label.setLayoutData(data1);
		Text text = new Text(shell, SWT.SINGLE);
		GridData data2 = new GridData(150, SWT.DEFAULT);
		data2.horizontalAlignment = GridData.BEGINNING;
		text.setLayoutData(data2);
		
		new Label(shell, SWT.None).setText("");
		Button b = new Button(shell, SWT.CHECK);
		b.setText("Add more strings???????????");
		
		final Label dlabel = new Label(shell, SWT.None);
		dlabel.setText("Description:");
		final Text dtext = new Text(shell, SWT.MULTI);
		final GridData hide = new GridData(0, 0);
		hide.exclude = true;
		dtext.setLayoutData(hide);
		dlabel.setLayoutData(hide);
		
		label = new Label(shell, SWT.None);
		label.setText("User:");
		data1 = new GridData(80, SWT.DEFAULT);
		label.setLayoutData(data1);
		text = new Text(shell, SWT.SINGLE);
		data2 = new GridData(150, SWT.DEFAULT);
		data2.horizontalAlignment = GridData.BEGINNING;
		text.setLayoutData(data2);	
		
		final GridData ldata = new GridData(80, SWT.DEFAULT);
		final GridData rdata = new GridData(150, 50);
		
		b.addListener(SWT.Selection, new Listener(){
			public void handleEvent(Event e){
				if(dtext.getLayoutData() == hide){
					dlabel.setLayoutData(ldata);
					dtext.setLayoutData(rdata);
					dlabel.setVisible(true);
					dtext.setVisible(true);
				}else{
					dlabel.setLayoutData(hide);
					dtext.setLayoutData(hide);
					dlabel.setVisible(false);
					dtext.setVisible(false);
				}
				
				shell.layout();
			}
		});
		
		shell.setSize(300, 400);
		shell.open();
		while(!shell.isDisposed()){
			if(display.readAndDispatch()) display.sleep();
		}



Help please, thanks a lot.
Re: SWT: try to hide/show widgets without success [message #780655 is a reply to message #780092] Wed, 18 January 2012 16:53 Go to previous message
Grant Gayed is currently offline Grant Gayed
Messages: 2148
Registered: July 2009
Senior Member
(note that there's an eclipse.platform.swt newsgroup for swt-specific
questions like this)

The following example snippets should be helpful:
-
http://git.eclipse.org/c/platform/eclipse.platform.swt.git/tree/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet98.java
-
http://git.eclipse.org/c/platform/eclipse.platform.swt.git/tree/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet175.java
-
http://git.eclipse.org/c/platform/eclipse.platform.swt.git/tree/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet249.java

HTH,
Grant


On 1/17/2012 2:04 AM, He Heng Huang wrote:
> Newbi questions.
>
> I laid the widgets in a 2 column gridlayout, and when user click a
> checkbox, I want to hide or show one line of the widgets. Tried many
> times, no success. Code as below:
>
> BTW, are there any other methods to hide/show composites or other
> controls by using SSWT?
>
>
> Display display = new Display();
> final Shell shell = new Shell(display);
> shell.setText("Just for testing");
> GridLayout layout = new GridLayout(2, false);
> shell.setLayout(layout);
>
> Label label = new Label(shell, SWT.None);
> label.setText("User:");
> GridData data1 = new GridData(80, SWT.DEFAULT);
> label.setLayoutData(data1);
> Text text = new Text(shell, SWT.SINGLE);
> GridData data2 = new GridData(150, SWT.DEFAULT);
> data2.horizontalAlignment = GridData.BEGINNING;
> text.setLayoutData(data2);
>
> new Label(shell, SWT.None).setText("");
> Button b = new Button(shell, SWT.CHECK);
> b.setText("Add more strings???????????");
>
> final Label dlabel = new Label(shell, SWT.None);
> dlabel.setText("Description:");
> final Text dtext = new Text(shell, SWT.MULTI);
> final GridData hide = new GridData(0, 0);
> hide.exclude = true;
> dtext.setLayoutData(hide);
> dlabel.setLayoutData(hide);
>
> label = new Label(shell, SWT.None);
> label.setText("User:");
> data1 = new GridData(80, SWT.DEFAULT);
> label.setLayoutData(data1);
> text = new Text(shell, SWT.SINGLE);
> data2 = new GridData(150, SWT.DEFAULT);
> data2.horizontalAlignment = GridData.BEGINNING;
> text.setLayoutData(data2);
>
> final GridData ldata = new GridData(80, SWT.DEFAULT);
> final GridData rdata = new GridData(150, 50);
>
> b.addListener(SWT.Selection, new Listener(){
> public void handleEvent(Event e){
> if(dtext.getLayoutData() == hide){
> dlabel.setLayoutData(ldata);
> dtext.setLayoutData(rdata);
> dlabel.setVisible(true);
> dtext.setVisible(true);
> }else{
> dlabel.setLayoutData(hide);
> dtext.setLayoutData(hide);
> dlabel.setVisible(false);
> dtext.setVisible(false);
> }
>
> shell.layout();
> }
> });
>
> shell.setSize(300, 400);
> shell.open();
> while(!shell.isDisposed()){
> if(display.readAndDispatch()) display.sleep();
> }
>
>
>
> Help please, thanks a lot.
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