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diff --git a/bundles/org.simantics.document.swt.core/src/org/simantics/document/swt/core/SWTDocumentClient.java b/bundles/org.simantics.document.swt.core/src/org/simantics/document/swt/core/SWTDocumentClient.java
new file mode 100644
index 000000000..99cbf6c31
--- /dev/null
+++ b/bundles/org.simantics.document.swt.core/src/org/simantics/document/swt/core/SWTDocumentClient.java
@@ -0,0 +1,158 @@
+package org.simantics.document.swt.core;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+
+import org.eclipse.jface.layout.GridDataFactory;
+import org.eclipse.jface.layout.GridLayoutFactory;
+import org.eclipse.jface.viewers.ISelectionProvider;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.Device;
+import org.eclipse.swt.graphics.Font;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.ui.IWorkbenchSite;
+import org.simantics.db.common.utils.Logger;
+import org.simantics.document.server.JSONObject;
+import org.simantics.document.server.client.DocumentClient;
+import org.simantics.document.server.client.WidgetData;
+import org.simantics.document.server.client.WidgetMapping;
+import org.simantics.document.server.handler.AbstractEventHandler;
+import org.simantics.document.server.io.CommandContext;
+import org.simantics.document.swt.core.base.WidgetContainer;
+import org.simantics.document.swt.core.widget.FillComposite;
+import org.simantics.ui.colors.Colors;
+import org.simantics.ui.fonts.Fonts;
+import org.simantics.utils.threads.IThreadWorkQueue;
+import org.simantics.utils.threads.SWTThread;
+
+public class SWTDocumentClient extends DocumentClient implements SWTDocument {
+
+	private Composite container;
+	private IWorkbenchSite site;
+	private ISelectionProvider selectionProvider;
+	private Device device;
+	private IThreadWorkQueue thread;
+	private Map<org.simantics.datatypes.literal.RGB.Integer, Color> colors = new HashMap<org.simantics.datatypes.literal.RGB.Integer, Color>();
+	private Map<org.simantics.datatypes.literal.Font, Font> fonts = new HashMap<org.simantics.datatypes.literal.Font, Font>();
+
+	private boolean requireLayout=false;
+
+	public SWTDocumentClient(WidgetMapping mapping, ISelectionProvider selectionProvider, IWorkbenchSite site, Composite container) {
+		
+		super(mapping, SWTViews.getCommandMapping());
+		
+		this.container = container;
+		this.site = site;
+		this.selectionProvider = selectionProvider;
+		this.device = container.getDisplay();
+		this.thread = SWTThread.getThreadAccess(container);
+
+		JSONObject rootObject = new JSONObject("root");
+		rootObject.addJSONField("type", "Root");
+		FillComposite mgr = new FillComposite();
+		WidgetContainer<?> wc = mgr.createWidget(rootObject); 
+		wc.createControl(this, container, rootObject);
+		
+		GridDataFactory.fillDefaults().grab(true, true).minSize(1, 1).applyTo((Control)wc.getControl());
+		GridLayoutFactory.fillDefaults().applyTo((Composite)wc.getControl());
+		
+		widgetData.put("root", new WidgetData(this, wc, rootObject));
+		
+	}
+	
+	@Override
+	public IThreadWorkQueue thread() {
+		return thread;
+	}
+	
+	@Override
+	public Color getColor(org.simantics.datatypes.literal.RGB.Integer descriptor) {
+		Color color = colors.get(descriptor);
+		if(color == null) {
+			color = Colors.swt(device, descriptor);
+			colors.put(descriptor, color);
+		}
+		return color;
+	}
+	
+	@Override
+	public Font getFont(org.simantics.datatypes.literal.Font descriptor) {
+		Font font = fonts.get(descriptor);
+		if(font == null) {
+			font = Fonts.swt(device, descriptor);
+			fonts.put(descriptor, font);
+		}
+		return font;
+	}
+	
+	@Override
+	public ISelectionProvider getSelectionProvider() {
+		return selectionProvider;
+	}
+	
+	@Override
+	public IWorkbenchSite getSite() {
+		return site;
+	}
+	
+	@Override
+	public void post(final AbstractEventHandler handler, CommandContext parameters) {
+		handler.handle(parameters);
+	}
+
+	@Override
+	protected void updateDocument(Collection<JSONObject> objects) {
+		assert thread.currentThreadAccess();
+		super.updateDocument(objects);
+		if(requireLayout) {
+			container.layout(true, true);
+			requireLayout = false;
+		}
+	}
+
+	@Override
+	protected void updateTree(HashSet<WidgetData> updates) {
+		
+		if(updates.isEmpty()) return;
+		
+		for(WidgetData data : updates) {
+			WidgetContainer<?> container = (WidgetContainer<?>)data.widget;
+			Control ctrl = container.getControl();
+			if (ctrl == null || ctrl.isDisposed())
+				continue;
+			if(ctrl instanceof Composite) {
+				Composite composite = (Composite)ctrl;
+				for(Control c : composite.getChildren()) {
+					c.dispose();
+				}
+			}
+		}
+		
+		super.updateTree(updates);
+		
+		for(WidgetData data : widgetData.values()) {
+			WidgetContainer<?> container = (WidgetContainer<?>)data.widget;
+			if(container != null)
+			    container.getOrCreateControl(this, data.object);
+		}
+		
+	}
+	
+	@Override
+	public void layout() {
+		requireLayout = true;
+	}
+	
+    @Override
+    public HashMap<String, WidgetData> getWidgetData() {
+        return widgetData;
+    }
+    
+    public void displayError(String error) {
+        Logger.defaultLogError(error);
+    }
+	
+}