plugins/org.eclipse.epp.installer.ui/src/org/eclipse/epp/installer/internal/ui/pages/ChoicePage.java

package org.eclipse.epp.installer.internal.ui.pages;

import org.eclipse.epp.installer.ui.IWizardStep;
import org.eclipse.epp.installer.ui.InstallPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;


/**
 * Wizard page displaying a text and two radio buttons.
 */
public class ChoicePage extends InstallPage
{
	private StyledText agreement;
	private Button acceptButton;
	private Button declineButton;
	private boolean continueOnDecline = true;
	private boolean choice;
	
	public ChoicePage(IWizardStep step) {
		super(step, "choicePage");
	}

	/**
	 * Create contents of the wizard
	 * 
	 * @param Composite parent
	 */
	public void createControl(Composite parent) {
		Composite container = new Composite(parent, SWT.NULL);
		final GridLayout gridLayout = new GridLayout();
		gridLayout.marginHeight = 10;
		gridLayout.marginWidth = 15;
		container.setLayout(gridLayout);
		setControl(container);
		
		createAgreement(container);
		createRadioButtons(container);

		updatePageComplete();
		setPageComplete(continueOnDecline);
	}

	private void createAgreement(Composite container) {
		agreement = new StyledText(container, SWT.V_SCROLL | SWT.BORDER | SWT.WRAP );		
		agreement.setEditable(false);
		agreement.setWordWrap(true);
		agreement.setLayoutData(new GridData( GridData.FILL, GridData.FILL, true, true));
	}
	
	private void createRadioButtons(Composite container) {
		acceptButton = new Button(container, SWT.RADIO);
		acceptButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		acceptButton.addSelectionListener(new SelectionListener() {
			public void widgetDefaultSelected(SelectionEvent e) {
				widgetSelected(e);
			}

			public void widgetSelected(SelectionEvent e) {
				choice = true;
				updatePageComplete();
				setPageComplete(true);
			}
		});

		declineButton = new Button(container, SWT.RADIO);
		declineButton.setSelection(true);
		declineButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		declineButton.addSelectionListener(new SelectionListener() {
			public void widgetDefaultSelected(SelectionEvent e) {
				widgetSelected(e);
			}

			public void widgetSelected(SelectionEvent e) {
				choice = false;
				updatePageComplete();
				setPageComplete(continueOnDecline);
			}
		});
	}
	
	/**
	 * Set the text to be displayed. 
	 * 
	 * Must be called after the wizard page content has been created.
	 * 
	 * @param String choiceText
	 */
	public void setChoiceText(String choiceText) {
		agreement.setText(choiceText);
	}
	
	/**
	 * Set the text for 'accept' option. 
	 * 
	 * Must be called after the wizard page content has been created.
	 * 
	 * @param String acceptText
	 */
	public void setAcceptText(String acceptText) {
		acceptButton.setText(acceptText);
	}

	/**
	 * Set the text for 'decline' option. 
	 * 
	 * Must be called after the wizard page content has been created.
	 * 
	 * @param String declineText
	 */
	public void setDeclineText(String declineText) {
		declineButton.setText(declineText);
	}

	/**
	 * Triggers behaivior of dialog page if 'decline' option selected. 
	 * 
	 * Must be called after the wizard page content has been created.
	 * 
	 * @param boolean flag
	 */
	public void setContinueOnDecline(boolean flag) {
		continueOnDecline = flag;
		setPageComplete(continueOnDecline);
	}
	
	/**
	 * Defines which button will be selected by default, 'Accept' if <code>true</code>,
	 * 'decline' if <code>false</code>.
	 * 
	 * @param boolean flag
	 */
	public void setDefaultChoice(boolean flag) {
		choice = flag;
		acceptButton.setSelection(flag);
		declineButton.setSelection(!flag);
	}
	
	/**
	 * Return the choice made. <code>true</code> for 'accept', <code>false</code> for 'decline'.
	 * 
	 * @return boolean
	 */
	public boolean getChoice() {
		return choice;
	}

	public void setVisible(boolean visible) {
		super.setVisible(visible);
		if (visible)
			setDefaultFocus();
	}

	/**
	 * Focus on default element
	 */
	public void setDefaultFocus() {
		if (getChoice()) {
			acceptButton.setFocus();
		} else {
			declineButton.setFocus();
		}
	}
}