/*
 * Copyright (c) 2003,2009 Declarative Engineering LLC.
 * All rights reserved.  This program and the accompanying materials
 * are made available under the terms of the Declarative Engineering LLC
 * verson 1 which accompanies this distribution, and is available at
 * http://declarativeengineering.com/legal/DE_Developer_License_v1.txt
 */
package com.foundation.view.swt;

import com.foundation.view.*;
import com.foundation.view.resource.ResourceReference;
import org.eclipse.swt.SWT;

public class Label extends Component {
	public static final int STYLE_SEPARATOR = SWT.SEPARATOR;
	public static final int STYLE_HORIZONTAL = SWT.HORIZONTAL;
	public static final int STYLE_VERTICAL = SWT.VERTICAL;
	public static final int STYLE_SHADOW_IN = SWT.SHADOW_IN;
	public static final int STYLE_SHADOW_OUT = SWT.SHADOW_OUT;
	public static final int STYLE_SHADOW_NONE = SWT.SHADOW_NONE;
	public static final int STYLE_LEFT = SWT.LEFT;
	public static final int STYLE_RIGHT = SWT.RIGHT;
	public static final int STYLE_CENTER = SWT.CENTER;
	public static final int STYLE_WRAP = SWT.WRAP;

	/** The label text. */
	private SingleResourceAssociation text = new SingleResourceAssociation(this, this, getViewContext(), SingleResourceAssociation.TYPE_TEXT, false, "");
	/** The label image. */
	private SingleResourceAssociation image = new SingleResourceAssociation(this, this, getViewContext(), SingleResourceAssociation.TYPE_IMAGE, false, null);
	/** A holder for the value of the text. */
	private ResourceHolder textHolder = new ResourceHolder(this);
	/** A holder for the value of the image. */
	private ResourceHolder imageHolder = new ResourceHolder(this);
/**
 * Label constructor.
 * @param parent A composite control which will be the parent of the new instance (cannot be null).
 * @param name The unique component name.
 * @param style The style of control to construct
 * @see #SEPARATOR
 * @see #HORIZONTAL
 * @see #VERTICAL
 * @see #SHADOW_IN
 * @see #SHADOW_OUT
 * @see #SHADOW_NONE
 * @see #LEFT
 * @see #RIGHT
 * @see #CENTER
 * @see #WRAP
 */
public Label(Container parent, String name, int style) {
	super(parent, name, style);
}//Label()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.AbstractComponent#initializeControl(int)
 */
protected void initializeControl(int style, Object data) {
	setSwtWidget(new org.eclipse.swt.widgets.Label(((Container) getContainer()).getSwtParent(), style));
	getSwtWidget().setData(this);
}//initializeControl()//
/**
 * Gets the SWT label that represents this label.
 * @return The SWT label providing visualization for this label.
 */
public org.eclipse.swt.widgets.Label getSwtLabel() {
	return (org.eclipse.swt.widgets.Label) getSwtControl();
}//getSwtLabel()//
/**
 * Sets the label's text.  This will be the default text if there is a text attribute associated with this component.
 * @param text The text that will appear in the label.
 */
public void setText(String text) {
	verifyThread();
	this.text.setDefaultValue(text);
}//setText()//
/**
 * Sets the component's default text resource.
 * @param text The text to be displayed by this component.
 */
public void setText(ResourceReference text) {
	verifyThread();
	this.text.setDefaultValue(text);
}//setText()//
/**
 * Sets the association container used to access the text.
 * @param container The text association metadata.
 */
public void setTextAssociation(SingleAssociationContainer container) {
	verifyThread();
	this.text.setAssociations(container);
}//setTextAssociation()//
/**
 * Sets the association container used to access the image.
 * @param container The image association metadata.
 */
public void setImageAssociation(SingleAssociationContainer container) {
	verifyThread();
	this.image.setAssociations(container);
}//setImageAssociation()//
/**
 * Sets the label's image.  This will be the default image if there is a image attribute associated with this component.
 * @param image The image to be displayed by the label.
 */
public void setImage(JefImage image) {
	verifyThread();
	this.image.setDefaultValue(image);
}//setImage()//
/**
 * Sets the component's default image resource.
 * @param image The image to be displayed by this component.
 */
public void setImage(ResourceReference image) {
	verifyThread();
	this.image.setDefaultValue(image);
}//setImage()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.AbstractComponent#internalViewInitialize()
 */
protected void internalViewInitialize() {
	text.initialize(true);
	image.initialize(true);
	super.internalViewInitialize();
}//internalViewInitialize()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.AbstractComponent#internalViewRelease()
 */
protected void internalViewRelease() {
	destroyImage((JefImage) imageHolder.getValue());
	text.release();
	image.release();
	textHolder.release();
	imageHolder.release();
	super.internalViewRelease();
}//internalViewRelease()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.AbstractComponent#internalViewRefresh()
 */
protected void internalViewRefresh() {
	super.internalViewRefresh();
	internalViewRefreshText();
	internalViewRefreshImage();
}//internalViewRefresh()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.Component#internalResourceHolderChanged(com.foundation.view.swt.ResourceHolder, java.lang.Object, java.lang.Object)
 */
protected void internalResourceHolderChanged(ResourceHolder resource, Object oldValue, Object newValue, int flags) {
	if(resource == textHolder) {
		String value = newValue != null ? (String) newValue : "";

		getSwtLabel().setText(value == null ? "" : value);
		resize();
	}//if//
	else if(resource == imageHolder) {
		destroyImage(getSwtLabel().getImage());
		getSwtLabel().setImage(createImage((JefImage) newValue));
		resize();
	}//else if//
	else {
		super.internalResourceHolderChanged(resource, oldValue, newValue, flags);
	}//else//
}//internalOnAssociationChanged()//
/**
 * Refreshes the component's text.
 */
protected void internalViewRefreshText() {
	if(text.refresh()) {
		textHolder.setValue(text.getValue());
	}//if//
}//internalViewRefreshText()//
/**
 * Refreshes the component's image.
 */
protected void internalViewRefreshImage() {
	if(image.refresh()) {
		imageHolder.setValue(image.getValue());
	}//if//
}//internalViewRefreshImage()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.AbstractComponent#internalOnValueChanged(com.foundation.view.SingleResourceAssociation)
 */
protected void internalOnValueChanged(SingleResourceAssociation resourceAssociation, int flags) {
	if(resourceAssociation == text) {
		internalViewRefreshText();
	}//if//
	else if(resourceAssociation == image) {
		internalViewRefreshImage();
	}//else if//
	else {
		super.internalOnValueChanged(resourceAssociation, flags);
	}//else//
}//internalOnValueChanged()//
}//Label//