plugins/org.eclipse.skills/src/org/eclipse/skills/ui/status/StatusBarProgressContribution.java

package org.eclipse.skills.ui.status;

import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.skills.model.ISkill;
import org.eclipse.skills.model.ISkillsPackage;
import org.eclipse.skills.service.ISkillService;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.menus.WorkbenchWindowControlContribution;

public class StatusBarProgressContribution extends WorkbenchWindowControlContribution {

	public StatusBarProgressContribution() {
	}

	public StatusBarProgressContribution(String id) {
		super(id);
	}

	@Override
	protected Control createControl(Composite parent) {
		final CustomDrawProgressBar progressBar = new CustomDrawProgressBar(parent);

		progressBar.setMinimum(0);
		progressBar.setMaximum(100);
		progressBar.setSelection(0);
		progressBar.setStatusText("Level 1");
		progressBar.setToolTipText("");
		progressBar.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_YELLOW));

		addModelListener(progressBar);

		return progressBar;
	}

	private void addModelListener(CustomDrawProgressBar progressBar) {
		final ISkillService skillService = PlatformUI.getWorkbench().getService(ISkillService.class);
		skillService.getUser().getExperience().eAdapters().add(new AdapterImpl() {
			@Override
			public void notifyChanged(Notification msg) {
				if (ISkillsPackage.eINSTANCE.getSkill_Experience().equals(msg.getFeature())) {
					if (msg.getNotifier() instanceof ISkill)
						updateProgressBar(progressBar, msg);
				}
			}
		});
	}

	private void updateProgressBar(CustomDrawProgressBar progressBar, Notification msg) {
		final ISkill skill = (ISkill) msg.getNotifier();
		final int currentLevel = skill.getProgression().getLevel(skill.getExperience());
		final int levelStart = skill.getProgression().getMinimumXpForLevel(currentLevel);
		final int nextLevelStart = skill.getProgression().getMinimumXpForLevel(currentLevel + 1);

		Display.getDefault().asyncExec(() -> {
			progressBar.setMinimum(levelStart);
			progressBar.setMaximum(nextLevelStart);
			progressBar.setSelection(skill.getExperience());

			progressBar.setStatusText(String.format("Level %d", currentLevel));
			progressBar.setToolTipText(String.format("%d XP to reach next level", (nextLevelStart - skill.getExperience())));

			progressBar.redraw();
		});
	}

}