Bug 11437 jar packager: no error message but buttons disabled
20020314 on the 'jar manifest' wizard page, if you select to use existing manifest file there's no error message but next and finish are disabled user should be informed what to do to make the wizard happy
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/JarManifestWizardPage.java
GridData data= new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL);
		data.widthHint= convertWidthInCharsToPixels(40);
		fNewManifestFileText.setLayoutData(data);
		
		fNewManifestFileBrowseButton= new Button(manifestFileGroup, SWT.PUSH);
		fNewManifestFileBrowseButton.setText(JarPackagerMessages.getString("JarManifestWizardPage.newManifestFileBrowseButton.text")); 
		fNewManifestFileBrowseButton.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
		fNewManifestFileBrowseButton.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				handleNewManifestFileBrowseButtonPressed();
			}
		});
	}
	protected void createManifestFileGroup(Composite parent) {
		
		Composite manifestFileGroup= new Composite(parent, SWT.NONE);
		GridLayout layout= new GridLayout();
		layout.numColumns= 3;
		layout.marginWidth= 0;
		
		manifestFileGroup.setLayout(layout);
		manifestFileGroup.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL));
		fManifestFileLabel= new Label(manifestFileGroup, SWT.NONE);
		fManifestFileLabel.setText(JarPackagerMessages.getString("JarManifestWizardPage.manifestFile.text")); 
		
		fManifestFileText= new Text(manifestFileGroup, SWT.SINGLE | SWT.BORDER);
		fManifestFileText.addListener(SWT.Modify, fUntypedListener);
		GridData data= new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL);
		data.widthHint= convertWidthInCharsToPixels(40);
		fManifestFileText.setLayoutData(data);