RowHeaderWidget.java example

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geogebra-master
package org.geogebra.web.web.cas.view;

import org.geogebra.common.cas.view.CASInputHandler;
import org.geogebra.common.cas.view.MarbleRenderer;
import org.geogebra.common.kernel.geos.GeoCasCell;
import org.geogebra.web.html5.main.AppW;
import org.geogebra.web.web.gui.images.AppResources;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;

public class RowHeaderWidget extends VerticalPanel implements MarbleRenderer {
	private Image marble;
	private boolean oldValue;
	private RowHeaderHandler handler;

	public RowHeaderWidget(CASTableW casTableW, int n, GeoCasCell cell, AppW app) {
		Label label = new Label();
		label.setText(n + "");
		marble = new Image(AppResources.INSTANCE.hidden());
		oldValue = false;
		add(label);
		add(marble);
		if (cell != null) {
			CASInputHandler.handleMarble(cell, this);
		}
		marble.addClickHandler(new MarbleClickHandler(cell, this));

		// instead of here, from now on the whole of header areas should
		// handle this event, so this is moved to CASTableCellControllerW
		// but still, create the RowHeaderHandler for quick implementation
		// addDomHandler(
		handler = new RowHeaderHandler(app, casTableW, this);
		// , MouseUpEvent.getType());
	}

	public RowHeaderHandler getHandler() {
		return handler;
	}

	public void setLabel(String text) {
		((Label) (getWidget(0))).setText(text);
	}

	public int getIndex() {
		return Integer.parseInt(((Label) (getWidget(0))).getText()) - 1;
	}

	@Override
	public void setMarbleValue(boolean value) {
		if (value == oldValue) {
			return;
		}
		marble.setUrl(value ? AppResources.INSTANCE.shown().getSafeUri()
		        : AppResources.INSTANCE.hidden().getSafeUri());
		oldValue = value;

	}

	@Override
	public void setMarbleVisible(boolean visible) {
		marble.setVisible(visible);

	}

	protected static class MarbleClickHandler implements ClickHandler {
		private GeoCasCell cell;
		private RowHeaderWidget rowHeaderWidget;

		protected MarbleClickHandler(GeoCasCell cell,
		        RowHeaderWidget rowHeaderWidget) {
			this.cell = cell;
			this.rowHeaderWidget = rowHeaderWidget;
		}

		@Override
		public void onClick(ClickEvent event) {
			cell.toggleTwinGeoEuclidianVisible();
			CASInputHandler.handleMarble(cell, rowHeaderWidget);
			event.stopPropagation();
		}
	}

}