ModelEditingDemo.java

package com.yoursway.modelediting.swt.demo;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;

import com.yoursway.modelediting.Fragment;
import com.yoursway.modelediting.IModelListener;
import com.yoursway.modelediting.Model;
import com.yoursway.modelediting.ReplaceImpossibleException;
import com.yoursway.modelediting.StaticTextFragment;
import com.yoursway.modelediting.TextFragment;
import com.yoursway.modelediting.swt.IStyledText;
import com.yoursway.modelediting.swt.ModelReconciler;

public class ModelEditingDemo {

	private StyledText styledText;
	private AngryLetter angryLetter;
	private TextFormModel formModel;
	private ModelReconciler reconciler;
	private Shell shell;

	private class StyledTextWrap implements IStyledText {

		public void addListener(int eventType, Listener listener) {
			styledText.addListener(eventType, listener);
		}

		public String getText() {
			return styledText.getText();
		}

		public void removeListener(int eventType, Listener listener) {
			styledText.removeListener(eventType, listener);
		}

		public void setText(String text) {
			Point selection = styledText.getSelection();
			styledText.setText(text);
			styledText.setSelection(selection);
			shell.layout();
		}

		public void replaceTextRange(int start, int length, String text) {
//			styledText.rep
		}

	}

	public void run() {
		Display display = new Display();
		shell = new Shell(display);
		shell.setSize(400, 300);
		shell.setLayout(new FillLayout());

		styledText = new StyledText(shell, SWT.BORDER);
		angryLetter = new AngryLetter();
		formModel = new TextFormModel();

		formModel.fragments().add(new StaticTextFragment("From: "));
		formModel.fragments().add(new TextFragment("<yourname here>", true, true));
		formModel.fragments().add(new StaticTextFragment("\n"));

		formModel.fragments().add(new StaticTextFragment("To: "));
		formModel.fragments().add(new TextFragment("<recipient name here>", true, true));
		formModel.fragments().add(new StaticTextFragment("\n"));

		formModel.fragments().add(new StaticTextFragment("Message: "));
		formModel.fragments().add(new TextFragment("<message here>", true, true));
		formModel.fragments().add(new StaticTextFragment("\n"));

		formModel.fragments().add(
				new StaticTextFragment("And again, fucking dumb, I'm writing you: "));
		formModel.fragments().add(new TextFragment("", true, true));
		formModel.fragments().add(new StaticTextFragment("\n"));

		formModel.addListener(new IModelListener() {

			public void modelChanged(Object sender, Model model, int firstFragment, int oldCount,
					int newCount) {
				if (sender == angryLetter)
					return;
				if (oldCount != newCount || oldCount != 1)
					throw new RuntimeException("Ooops...");
				String fragmentText = model.fragments().get(firstFragment).toString();
				switch (firstFragment) {
				case 1:
					angryLetter.setFrom(fragmentText);
					break;
				case 4:
					angryLetter.setTo(fragmentText);
					break;
				case 7:
				case 10:
					angryLetter.setMessage(fragmentText);
					break;
				default:
					throw new RuntimeException("Trying to change non-changable!");
				}
			}

		});

		angryLetter.addListener(new LetterListener() {

			private void setFragmentToString(int index, String string) {
				Fragment fragment = formModel.fragments().get(index);
				try {
					formModel.replace(angryLetter, fragment, 0, fragment.toString().length(),
							string);
				} catch (ReplaceImpossibleException e) {
					throw new RuntimeException(e);
				}
			}

			public void fromChanged() {
				setFragmentToString(1, angryLetter.from());
			}

			public void messageChanged() {
				setFragmentToString(7, angryLetter.message());
				setFragmentToString(10, angryLetter.message());
			}

			public void toChanged() {
				setFragmentToString(4, angryLetter.to());
			}

		});

		reconciler = new ModelReconciler(new StyledTextWrap(), formModel);

		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}

	public static void main(String[] args) {
		try {
			new ModelEditingDemo().run();
		} catch (Throwable e) {
			e.printStackTrace();
		}
	}
}