Bug 58985 [Dialogs] WizardDialog.getButton( IDialogConstants.CANCLE_ID ) always returns null
Here's a test case for this bug. Watch the stdout of the program. --WizardDialogBug import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.wizard.IWizard; import org.eclipse.jface.wizard.Wizard; import org.eclipse.jface.wizard.WizardDialog; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class WizardDialogBug { public static void main(String[] args) { WizardDialogBug wizardDialogBug = new WizardDialogBug(); wizardDialogBug.run(); } public void run() { Display display = new Display(); Shell shell = new Shell( display, SWT.NONE ); TestWizard wizard = new TestWizard(); TestWizardDialog dialog = new TestWizardDialog( shell, wizard ); dialog.setBlockOnOpen( false ); dialog.open(); while( !shell.isDisposed() ) if( !display.readAndDispatch() ) display.sleep(); display.dispose(); } // test WizardPage public class TestWizardPage extends WizardPage { public TestWizardPage() { super( "TestWizardPage" ); } public void createControl(Composite parent) { Button b = new Button( parent, SWT.PUSH ); b.setText( "Button" ); setControl( b ); } } // test Wizard public class TestWizard extends Wizard { public TestWizard() { super(); setWindowTitle( "TestWizard" ); } public void addPages() { addPage( new TestWizardPage() ); } public boolean performFinish() { return false; } } // test WizardDialog public class TestWizardDialog extends WizardDialog { public TestWizardDialog( Shell shell, IWizard wizard ) { super( shell, wizard ); } public int open() { int rc = super.open(); // by now, all controls should have been created; System.out.println( getButton( IDialogConstants.FINISH_ID ) ); System.out.println( getButton( IDialogConstants.CANCEL_ID ) ); return rc; } } }
bundles/org.eclipse.jface/src/org/eclipse/jface/wizard/WizardDialog.java
* this layout is the maximum width and height of all pages currently
	 * inserted into the container.
	 */
	protected class PageContainerFillLayout extends Layout {
		/**
		 * The margin width; <code>5</code> pixels by default.
		 */
		public int marginWidth = 5;
		/**
		 * The margin height; <code>5</code> pixels by default.
		 */
		public int marginHeight = 5;
		/**
		 * The minimum width; <code>0</code> pixels by default.
		 */
		public int minimumWidth = 0;
		/**
		 * The minimum height; <code>0</code> pixels by default.
		 */
		public int minimumHeight = 0;
		/**
		 * Creates new layout object.
		 *
		 * @param mw the margin width
		 * @param mh the margin height
		 * @param minW the minimum width
		 * @param minH the minimum height
		 */
		public PageContainerFillLayout(int mw, int mh, int minW, int minH) {
			marginWidth = mw;