package org.simantics.document.swt.core.widget;

import java.util.TreeMap;

import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.events.ControlListener;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.simantics.document.server.JSONObject;
import org.simantics.document.server.client.WidgetData;
import org.simantics.document.swt.core.SWTDocument;
import org.simantics.document.swt.core.SWTViews;
import org.simantics.document.swt.core.base.HasWidgetsWidgetManager;
import org.simantics.document.swt.core.base.ScrolledCompositeContent;
import org.simantics.document.swt.core.base.WidgetContainer;

public class ScrolledCompositeWidget extends HasWidgetsWidgetManager<ScrolledCompositeContent> {
	
	@Override
	protected void doUpdateProperties(SWTDocument document, ScrolledCompositeContent control, JSONObject object) {
	}

	@Override
	protected ScrolledCompositeContent doCreateControl(SWTDocument document, Composite parent, JSONObject object) {
		
		ScrolledComposite explorersScroll = new ScrolledComposite(parent, SWT.V_SCROLL | SWT.BORDER);
		explorersScroll.setBackground(Display.getCurrent().getSystemColor(
				SWT.COLOR_WHITE));
		explorersScroll.setLayout(GridLayoutFactory.fillDefaults()
				.margins(0, 0).spacing(0, 0).create());
		GridDataFactory.fillDefaults().grab(true, true).span(1, 1)
				.applyTo(explorersScroll);

		ScrolledCompositeContent explorers = new ScrolledCompositeContent(explorersScroll, SWT.NONE);

		explorersScroll.addControlListener(new ControlListener() {

			@Override
			public void controlResized(ControlEvent e) {
				SWTViews.notifyScrolledComposite(explorers);
			}

			@Override
			public void controlMoved(ControlEvent e) {
				SWTViews.notifyScrolledComposite(explorers);
			}
		});

		explorers.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
		
		// Make sure that exploders are initially visible
		explorers.setSize(10, 300);
		explorers.setLayout(GridLayoutFactory.fillDefaults().margins(0, 0).numColumns(1)
				.spacing(0, 0).create());

		explorersScroll.setMinSize(100, 100);
		explorersScroll.setContent(explorers);

		return explorers;

	}
	
	@Override
	public void updateChildren(SWTDocument document, JSONObject object, WidgetContainer widget, TreeMap<String, WidgetData> childMap) {
		
		super.updateChildren(document, object, widget, childMap);

		for(WidgetData c : childMap.values()) {

			WidgetContainer con = (WidgetContainer)c.widget;
			Control child = con.getControl();
			GridDataFactory.fillDefaults().grab(true, false).applyTo(child);
			
		}
		
	}
	
}