LED.java example

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windowtester-master
/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.gef.examples.logicdesigner.model;

import org.eclipse.swt.graphics.Image;

import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.PropertyDescriptor;
import org.eclipse.ui.views.properties.TextPropertyDescriptor;

import org.eclipse.draw2d.geometry.Dimension;

import org.eclipse.gef.examples.logicdesigner.LogicMessages;

public class LED
	extends LogicSubpart
{

static final long serialVersionUID = 1;

private static Image LED_ICON = createImage(LED.class, "icons/ledicon16.gif");  //$NON-NLS-1$
private static int count;
public static String P_VALUE = "value";  //$NON-NLS-1$
protected static IPropertyDescriptor[] newDescriptors = null;
protected static final Dimension defaultSize = new Dimension(61,47);

//Inputs
public static String
	TERMINAL_1_IN = "A",  //$NON-NLS-1$
	TERMINAL_2_IN = "B",  //$NON-NLS-1$
	TERMINAL_3_IN = "C",  //$NON-NLS-1$
	TERMINAL_4_IN = "D";  //$NON-NLS-1$
//Outputs
public static String
	TERMINAL_1_OUT = "1",  //$NON-NLS-1$
	TERMINAL_2_OUT = "2",  //$NON-NLS-1$
	TERMINAL_3_OUT = "3",  //$NON-NLS-1$
	TERMINAL_4_OUT = "4";  //$NON-NLS-1$

protected boolean bits[] = new boolean[4];

static{
	PropertyDescriptor pValueProp = new TextPropertyDescriptor(P_VALUE, 
			LogicMessages.PropertyDescriptor_LED_Value);
	pValueProp.setValidator(LogicNumberCellEditorValidator.instance());
	if(descriptors!=null){
		newDescriptors = new IPropertyDescriptor[descriptors.length+1];
		for(int i=0;i<descriptors.length;i++)
			newDescriptors[i] = descriptors[i];
		newDescriptors[descriptors.length] = pValueProp;
	} else
		newDescriptors = new IPropertyDescriptor[]{pValueProp};
}

public LED() {
	size.width = defaultSize.width;
	size.height = defaultSize.height;
	location.x = 20;
	location.y = 20;
}

public Image getIconImage() {
	return LED_ICON;
}

public String getNewID(){
	return Integer.toString(count++);
}

public IPropertyDescriptor[] getPropertyDescriptors() {
	return newDescriptors;
}

public Object getPropertyValue(Object propName) {
	if (P_VALUE.equals(propName))
		return new Integer(getValue()).toString();
	if( ID_SIZE.equals(propName)){
		return new String("("+getSize().width+","+getSize().height+")");//$NON-NLS-3$//$NON-NLS-2$//$NON-NLS-1$
	}
	return super.getPropertyValue(propName);
}

public void resetPropertyValue(Object id){
	if (P_VALUE.equals(id))
		setValue(0);
	super.resetPropertyValue(id);
}

public int getValue(){
	int val = 0;
	if (bits[0]) val += 1;
	if (bits[1]) val += 2;
	if (bits[2]) val += 4;
	if (bits[3]) val += 8;
	return val;
}

protected boolean hasInput(){
	return !inputs.isEmpty();
}

/**
 * Nulls out any changes to this's size as
 * it is fixed.
 */
public void setPropertyValue(Object id, Object value){
	if (P_VALUE.equals(id))
		setValue(Integer.parseInt((String)value));
	else
		super.setPropertyValue(id,value);
}

public void setSize(Dimension d){
	super.setSize(defaultSize);
}

public void setValue(int v){
	int val = v%16;
	bits = new boolean[4];	//Shorthand to set all bits to false
	if (val>=8)
		bits[3] = true;
	if (val%8 > 3)
		bits[2] = true;
	if (val%4 > 1)
		bits[1] = true;
	bits[0] = val%2 == 1;
	update();
	firePropertyChange(P_VALUE, null, null);
}

public String toString() {
	return LogicMessages.LED_LabelText + " #" + getID() //$NON-NLS-1$
	       + " " + LogicMessages.PropertyDescriptor_LED_Value //$NON-NLS-1$
	       + "=" + getValue();    //$NON-NLS-1$
}

public void update(){
	if (hasInput()){
		bits = new boolean[4];
		bits[0] = getInput(TERMINAL_1_IN);
		bits[1] = getInput(TERMINAL_2_IN);
		bits[2] = getInput(TERMINAL_3_IN);
		bits[3] = getInput(TERMINAL_4_IN);
		firePropertyChange(P_VALUE, null, null);
	}

	setOutput(TERMINAL_1_OUT, bits[0]);
	setOutput(TERMINAL_2_OUT, bits[1]);
	setOutput(TERMINAL_3_OUT, bits[2]);
	setOutput(TERMINAL_4_OUT, bits[3]);
}

}