/*
 * Copyright (c) 2003-2004 Christopher Lenz and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     Christopher Lenz - initial API and implementation
 * 
 * $Id: CssEditorContentAssistConfigurationBlock.java,v 1.1 2004-09-02 18:11:50 jsurfer Exp $
 */

package net.sourceforge.phpeclipse.css.ui.internal.preferences;

import net.sourceforge.phpeclipse.css.ui.internal.CssUIMessages;
import net.sourceforge.phpeclipse.css.ui.internal.CssUIPreferences;

import org.eclipse.jface.preference.ColorSelector;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferenceConverter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.List;

/**
 * Configuration block for setting the preferences related to content assist.
 */
final class CssEditorContentAssistConfigurationBlock
	extends AbstractConfigurationBlock {

	// Instance Variables ------------------------------------------------------

	private List fColorList;
	private final String[][] fColorListModel = new String[][] {
		{ getString("backgroundForCompletionProposals"), //$NON-NLS-1$
		  CssUIPreferences.CONTENTASSIST_PROPOSALS_BACKGROUND },
		{ getString("foregroundForCompletionProposals"), //$NON-NLS-1$
		  CssUIPreferences.CONTENTASSIST_PROPOSALS_FOREGROUND },
	};
	private ColorSelector fColorSelector;
	private Control fAutoActivationDelayField;
	private Control fAutoActivationTriggersField;

	// Constructors ------------------------------------------------------------

	public CssEditorContentAssistConfigurationBlock(IPreferenceStore store) {
		super(store);
	}

	// Public Methods ----------------------------------------------------------

	public Control createControl(Composite parent) {

		Composite composite = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		composite.setLayout(layout);

		//addCompletionRadioButtons(contentAssistComposite);

		addBooleanField(composite,
			getString("insertSingleProposalsAutomatically"), //$NON-NLS-1$
			CssUIPreferences.CONTENTASSIST_AUTOINSERT, 0);
		addBooleanField(composite,
			getString("presentProposalsInAlphabeticalOrder"), //$NON-NLS-1$
			CssUIPreferences.CONTENTASSIST_ORDER_PROPOSALS, 0);
		addBooleanField(composite,
			getString("enableAutoActivation"), //$NON-NLS-1$
			CssUIPreferences.CONTENTASSIST_AUTOACTIVATION,
			0).addSelectionListener(new SelectionAdapter() {
				public void widgetSelected(SelectionEvent e) {
					updateAutoactivationControls();
				}
			});
		fAutoActivationDelayField = addIntegerField(composite,
			getString("autoActivationDelay"), //$NON-NLS-1$
			CssUIPreferences.CONTENTASSIST_AUTOACTIVATION_DELAY, 4, 0);
		fAutoActivationTriggersField = addTextField(composite,
			getString("autoActivationTriggers"), //$NON-NLS-1$
			CssUIPreferences.CONTENTASSIST_AUTOACTIVATION_TRIGGERS, 4, 0);

		Label label = new Label(composite, SWT.LEFT);
		label.setText(getString("colorOptions")); //$NON-NLS-1$
		GridData gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
		gridData.horizontalSpan = 2;
		label.setLayoutData(gridData);

		Composite editorComposite = new Composite(composite, SWT.NONE);
		layout = new GridLayout();
		layout.numColumns = 2;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		editorComposite.setLayout(layout);
		gridData = new GridData(
			GridData.HORIZONTAL_ALIGN_FILL | GridData.FILL_VERTICAL);
		gridData.horizontalSpan = 2;
		editorComposite.setLayoutData(gridData);

		fColorList = new List(editorComposite,
			SWT.SINGLE | SWT.V_SCROLL | SWT.BORDER);
		gridData = new GridData(
			GridData.VERTICAL_ALIGN_BEGINNING | GridData.FILL_HORIZONTAL);
		gridData.heightHint = convertHeightInCharsToPixels(composite, 8);
		fColorList.setLayoutData(gridData);
		fColorList.addSelectionListener(new SelectionListener() {
			public void widgetDefaultSelected(SelectionEvent e) {
				// do nothing
			}
			public void widgetSelected(SelectionEvent e) {
				handleColorListSelection();
			}
		});

		Composite stylesComposite = new Composite(editorComposite, SWT.NONE);
		layout = new GridLayout();
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		layout.numColumns = 2;
		stylesComposite.setLayout(layout);
		stylesComposite.setLayoutData(new GridData(GridData.FILL_BOTH));
		label = new Label(stylesComposite, SWT.LEFT);
		label.setText(getString("color")); //$NON-NLS-1$
		gridData = new GridData();
		gridData.horizontalAlignment = GridData.BEGINNING;
		label.setLayoutData(gridData);

		fColorSelector = new ColorSelector(stylesComposite);
		Button colorButton = fColorSelector.getButton();
		gridData = new GridData(GridData.FILL_HORIZONTAL);
		gridData.horizontalAlignment = GridData.BEGINNING;
		colorButton.setLayoutData(gridData);
		colorButton.addSelectionListener(new SelectionListener() {
			public void widgetDefaultSelected(SelectionEvent e) {
				// do nothing
			}
			public void widgetSelected(SelectionEvent e) {
				int i = fColorList.getSelectionIndex();
				String key = fColorListModel[i][1];
				PreferenceConverter.setValue(getPreferenceStore(), key,
					fColorSelector.getColorValue());
			}
		});

		initialize();

		return composite;
	}

	// Event Handlers ----------------------------------------------------------

	void handleColorListSelection() {
		int i = fColorList.getSelectionIndex();
		String key = fColorListModel[i][1];
		RGB rgb = PreferenceConverter.getColor(getPreferenceStore(), key);
		fColorSelector.setColorValue(rgb);
	}

	// Private Methods ---------------------------------------------------------

	private static String getString(String key) {
		return CssUIMessages.getString(
			"CssEditorPreferencePage.contentAssist." + key); //$NON-NLS-1$
	}

	private void initialize() {
		for (int i = 0; i < fColorListModel.length; i++) {
			fColorList.add(fColorListModel[i][0]);
		}
		fColorList.getDisplay().asyncExec(new Runnable() {
			public void run() {
				if ((fColorList != null)
				 && !fColorList.isDisposed()) {
					fColorList.select(0);
					handleColorListSelection();
				}
			}
		});
		initializeFields();
	}

	private void updateAutoactivationControls() {
		boolean enabled = getPreferenceStore().getBoolean(
			CssUIPreferences.CONTENTASSIST_AUTOACTIVATION);
		fAutoActivationDelayField.setEnabled(enabled);
		getLabel(fAutoActivationDelayField).setEnabled(enabled);
		fAutoActivationTriggersField.setEnabled(enabled);
		getLabel(fAutoActivationTriggersField).setEnabled(enabled);
	}

}