fixedpropertysupport.java

PIY(Program It Yourself)是一个基于Java的应用程序开发环境

package piy.support;

import piy.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.BevelBorder;
import java.awt.Dimension;
import java.util.ArrayList;

/**
* Support for properties of FixedProperty type.
* @author David Vivash
* @version 1.0, 25/03/01
*/
public class FixedPropertySupport extends ClassSupport implements ActionListener, ChangeListener
{
	private FixedPropertySupport instance = null;

	private JComboBox valueChoice = null, holderChoice = null;
	private boolean editting = false;

	private FixedProperty value = null;
	private ClassSupport support = null;
	private static final String STATIC = "Static", DYNAMIC = "Dynamic", 
								HOLDER_CHOICE="Holder", VALUE_CHOICE="Value"; 
	
	public FixedPropertySupport(Property property) {
		super(property);
		AlignmentLayout layout = new AlignmentLayout();
		setLayout(layout);

		value = (FixedProperty)property.getValue();
		
		boolean dynamicOnly = false;
		if (value != null) dynamicOnly = value.getDynamicOnly();

		instance = this;
		JTabbedPane tabPane = null;

		if (!dynamicOnly) {
			tabPane = new JTabbedPane();
			add(tabPane);
			layout.setAlignment(tabPane, Align.CLIENT);
		}
		
		//Set up static panel
		if ((value != null) && !dynamicOnly)
			if (value.getType() != null) {
				support = new PropertyManager(PIY.getInstance().getClassSupport()).getSupport(new Property(value, "Value", value.getType()));
				JPanel panel = new JPanel();
				CentralLayout cLayout = new CentralLayout();
				panel.setLayout(cLayout); 
				panel.add(support); 
				cLayout.addLayoutComponent("", support);
				
				tabPane.addTab(STATIC, panel);
			}
			
		//Set up dynamic panel
		holderChoice = new JComboBox(ProjectHandler.getInstance().getGuiNamer().getNames());
		holderChoice.insertItemAt("", 0);

		if (value.getProperty() != null) {
			String holderName = ProjectHandler.getInstance().getGuiNamer().getName(value.getProperty().getHolder());

			if (holderName == null) holderChoice.setSelectedIndex(0);
			else 
				for (int i=0; i<holderChoice.getItemCount(); i++) {
					if (holderName.equals((String)holderChoice.getItemAt(i)))
						holderChoice.setSelectedIndex(i);
				}
		}

		valueChoice = new JComboBox();
		setup();
		JPanel holder = new JPanel();
		AlignmentLayout holderLayout = new AlignmentLayout();
		holder.setLayout(holderLayout);
		holder.add(holderChoice);
		holder.add(valueChoice);
		holderChoice.setBounds(0,0,100,24);
		valueChoice.setBounds(0,24,100,24);
		
		holderLayout.setAlignment(holderChoice, Align.TOP);
		holderLayout.setAlignment(valueChoice, Align.BOTTOM);
		holder.setPreferredSize(new Dimension(100,48));
		
		JPanel dynamicPanel = new JPanel();
		CentralLayout dynamicLayout = new CentralLayout();
		dynamicPanel.setLayout(dynamicLayout);
		dynamicPanel.add(holder);
		dynamicLayout.addLayoutComponent("", holder);
		
		if (!dynamicOnly) {
			tabPane.addTab(DYNAMIC, dynamicPanel);	
			tabPane.setSelectedIndex(value.getInternal() ? 0 : 1);
		} else {
			add(dynamicPanel);
			layout.setAlignment(dynamicPanel, Align.CLIENT);
		}
		
		
		valueChoice.setActionCommand(VALUE_CHOICE);
		holderChoice.setActionCommand(HOLDER_CHOICE);		
		valueChoice.addActionListener(this);
		holderChoice.addActionListener(this);
		if (!dynamicOnly) tabPane.addChangeListener(this);
	}

	/**
	* Get the properties of the specified holder which are of the correct type for our fixed 
	* property.
	* @return the property names
	*/
	private String[] getProperties(Object holder) {
		String[] toReturn = null;

		if (holder instanceof Variable) {
			if ( ((Variable)holder).getType() == value.getType() ) //the variable is of the correct type
				toReturn = new String[] { "Value" };
			else toReturn = new String[0];
		
		} else {
			Property[] names = new PropertyManager(PIY.getInstance().getClassSupport()).getProperties(holder, UserWindow.class.isAssignableFrom(holder.getClass()) ? UserWindow.class : UserComponent.class, false, null);

			ArrayList properties = new ArrayList(names.length);
			
			for (int i=0; i<names.length; i++)
				if (names[i].getType() == value.getType())
					properties.add(names[i].getName());
					
			toReturn = new String[properties.size()];
			for (int i=0; i<toReturn.length; i++)
				toReturn[i] = (String)properties.get(i);

		}

		return toReturn;
	}

	private void setup() {
		editting = true;
		
		valueChoice.removeAllItems();
		valueChoice.addItem("");

		if ((value.getProperty() != null) && (value.getProperty().getHolder() != null)) {
			String[] values = getProperties(value.getProperty().getHolder());
			for (int i=0; i<values.length; i++)
				valueChoice.addItem(values[i]);
	
			String propertyName = value.getProperty().getName();
			if (propertyName != null)
				for (int i=0; i<values.length; i++)
					if (propertyName.equals(values[i]))
						valueChoice.setSelectedIndex(i+1);
	
			value.setProperty(new Property(value.getProperty().getHolder(), (String)valueChoice.getSelectedItem(), value.getType()));		
		}
				
		editting = false;
	}

	public static Class getSupportedClass() { return FixedProperty.class; }

	public Dimension getMinimumSize() { return support == null ? new Dimension(10, 50) : addDimension(support.getMinimumSize(), new Dimension(10, 50)); }
	public Dimension getPreferredSize() { return support == null ? new Dimension(100, 50) : addDimension(support.getPreferredSize(), new Dimension(10, 50)); }
	public Dimension getMaximumSize() { return support == null ? new Dimension(10000, 50) : addDimension(support.getMaximumSize(), new Dimension(10, 50)); }

	private Dimension addDimension(Dimension a, Dimension b) {
		return new Dimension((int)(a.getWidth() + b.getWidth()), (int)(a.getHeight()+b.getHeight()));
	}
	
	public void stateChanged(ChangeEvent e) {
		value.setInternal(((JTabbedPane)e.getSource()).getSelectedIndex() == 0);
		ProjectHandler.getInstance().projectChanged();
	}

	//---- ActionListener method -----
	public void actionPerformed(ActionEvent e) {
		if (!editting) {
			String action = e.getActionCommand();
			if (action == HOLDER_CHOICE) { //set the holder
				Object holder = ProjectHandler.getInstance().getGuiNamer().getValue((String)holderChoice.getSelectedItem());
				value.setProperty(new Property(holder, "", value.getType()));		
				setup();
			} else { //set the property
				value.setProperty(new Property(value.getProperty().getHolder(), (String)valueChoice.getSelectedItem(), value.getType()));
				property.setValue(value);
			}

			ProjectHandler.getInstance().projectChanged();
		}
	}
}