package org.eclipse.dltk.internal.debug.ui;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;

/**
 * An error dialog which allows the user to set a boolean preference.
 *
 * This is typically used to set a preference that determines if the dialog
 * should be shown in the future
 */
public class ErrorDialogWithToggle extends ErrorDialog {

	/**
	 * The preference key which is set by the toggle button. This key must be a
	 * boolean preference in the preference store.
	 */
	private String fPreferenceKey = null;
	/**
	 * The message displayed to the user, with the toggle button
	 */
	private String fToggleMessage = null;
	private Button fToggleButton = null;
	/**
	 * The preference store which will be affected by the toggle button
	 */
	IPreferenceStore fStore = null;

	public ErrorDialogWithToggle(Shell parentShell, String dialogTitle,
			String message, IStatus status, String preferenceKey,
			String toggleMessage, IPreferenceStore store) {
		super(parentShell, dialogTitle, message, status,
				IStatus.WARNING | IStatus.ERROR | IStatus.INFO);
		fStore = store;
		fPreferenceKey = preferenceKey;
		fToggleMessage = toggleMessage;
	}

	@Override
	protected Control createDialogArea(Composite parent) {
		Composite dialogComposite = (Composite) super.createDialogArea(parent);
		dialogComposite.setFont(parent.getFont());
		setToggleButton(createCheckButton(dialogComposite, fToggleMessage));
		getToggleButton().setSelection(!fStore.getBoolean(fPreferenceKey));
		applyDialogFont(dialogComposite);
		return dialogComposite;
	}

	/**
	 * Creates a button with the given label and sets the default configuration
	 * data.
	 */
	private Button createCheckButton(Composite parent, String label) {
		Button button = new Button(parent, SWT.CHECK | SWT.LEFT);
		button.setText(label);

		GridData data = new GridData(SWT.NONE);
		data.horizontalSpan = 2;
		data.horizontalAlignment = GridData.CENTER;
		button.setLayoutData(data);
		button.setFont(parent.getFont());

		return button;
	}

	@Override
	protected void buttonPressed(int id) {
		if (id == IDialogConstants.OK_ID) { // was the OK button pressed?
			storePreference();
		}
		super.buttonPressed(id);
	}

	private void storePreference() {
		fStore.setValue(fPreferenceKey, !getToggleButton().getSelection());
	}

	protected Button getToggleButton() {
		return fToggleButton;
	}

	protected void setToggleButton(Button button) {
		fToggleButton = button;
	}

	@Override
	protected void createButtonsForButtonBar(Composite parent) {
		super.createButtonsForButtonBar(parent);
		getButton(IDialogConstants.OK_ID).setFocus();
	}
}