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
* @param keepCancelEnabled <code>true</code> if the Cancel button should
	 *   remain enabled, and <code>false</code> if it should be disabled
	 * @return a map containing the saved state suitable for restoring later
	 *   with <code>restoreUIState</code>
	 * @see #restoreUIState
	 */
	private Map saveUIState(boolean keepCancelEnabled) {
		Map savedState = new HashMap(10);
		saveEnableStateAndSet(backButton, savedState, "back", false); 
		saveEnableStateAndSet(nextButton, savedState, "next", false); 
		saveEnableStateAndSet(finishButton, savedState, "finish", false); 
		saveEnableStateAndSet(cancelButton, savedState, "cancel", keepCancelEnabled); 
		saveEnableStateAndSet(helpButton, savedState, "help", false); 
		savedState.put("page", ControlEnableState.disable(currentPage.getControl())); 
		return savedState;
	}
	/**
	 * Sets the given cursor for all shells currently active
	 * for this window's display.
	 *
	 * @param c the cursor
	 */
	private void setDisplayCursor(Cursor c) {
		Shell[] shells = getShell().getDisplay().getShells();
		for (int i = 0; i < shells.length; i++)
			shells[i].setCursor(c);
	}
	/**
	 * Sets the minimum page size used for the pages.
	 *