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scrollbars don't scroll in Composite [message #1779800]

Fri, 12 January 2018 15:22

Eclipse User

I'm sure this has been answered before, but I just can't find it.
Eclipse Helios RCP code
Java 1.6

Now that everyone has finished laughing ...
I added a Composite inside another composite and I run through a loop, adding an unknown number of buttons to the second Composite. I did try using a ScrolledComposite, but can't get the buttons to appear in it, so I'm using a vanilla Composite. The scrollbars appear, but don't do anything.

Code speaks louder than words. I've left stuff out, but this is the gist. I'm sure there's something simple I've left out, like enabling scrolling or reciting the Pledge of Allegiance.

Composite wComp1 = new Composite(wComp, SWT.V_SCROLL|SWT.H_SCROLL);
wComp1.setBackground(null);

setControl(wComp1);
wComp1.setLayout(new FormLayout());

wData = new FormData();
wData.top = new FormAttachment(wLastControl, 20);
wData.left = new FormAttachment(0, 10);
wData.right = new FormAttachment(100, -10);
wData.bottom = new FormAttachment(100, -10);
wComp1.setLayoutData(wData);

try {
//get the data
pCodes[] = ...... (omitted)

for (int i = 0; i < pCodes.length; i++) {
if (pCodes[i].getPayerBypassCode() != BigInteger.ZERO) {
Button wButton = new Button(wComp1, SWT.CHECK);
wButton.setBackground(null);
wData = new FormData();
wData.left = new FormAttachment(0, 25);
wData.top = new FormAttachment(wLastControl, 5);
wButton.setLayoutData(wData);
addPayerBypassButton(wButton, pCodes[i]);
wButton.addSelectionListener(new SelectionListener() {
---------------------------------------------------------------------------------------------------------------

Appreciate any help!

Re: scrollbars don't scroll in Composite [message #1779815 is a reply to message #1779800]

Sat, 13 January 2018 03:03

Eclipse User

I'm not sure the answer, but perhaps the SWT Snippets contain an example https://www.eclipse.org/swt/snippets/ if you search for the word "scroll" on that page.

Re: scrollbars don't scroll in Composite [message #1779836 is a reply to message #1779815]

Sun, 14 January 2018 03:50

Eclipse User

Does anything look amiss other than the scrolling not being available?

Re: scrollbars don't scroll in Composite [message #1779997 is a reply to message #1779836]

Tue, 16 January 2018 07:52

Eclipse User

Nothing looks bad. The checkboxes appear, but continue off the viewable area. I'm unable to scroll down to view more boxes.

Re: scrollbars don't scroll in Composite [message #1780046 is a reply to message #1779997]

Tue, 16 January 2018 14:10

Eclipse User

What layout is wComp (not wComp1) using?