EntityModelInputWithSlider.java

package org.ovirt.engine.ui.webadmin.widget.editor;

import org.ovirt.engine.ui.webadmin.widget.IntegerSlider;

import com.google.gwt.editor.client.LeafValueEditor;
import com.google.gwt.event.dom.client.KeyDownHandler;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.event.logical.shared.HasValueChangeHandlers;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.i18n.client.NumberFormat;
import com.google.gwt.user.client.TakesValue;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.TextBox;

/**
 * This class extends Composite instead of InputText and embeds a slider widget
 * for setting its value.
 */
public class EntityModelInputWithSlider extends Composite implements
		EditorWidget<Object, LeafValueEditor<Object>>, TakesValue<Object>,
		HasValueChangeHandlers<Object> {

	private TakesValueWithChangeHandlersEditor<Object> editor;
	private TextBox t;
	private IntegerSlider slider;

	public EntityModelInputWithSlider(int min, int max) {
		HorizontalPanel panel = new HorizontalPanel();

		t = new TextBox();
		t.setEnabled(false);
		t.setVisibleLength(2);

		slider = new IntegerSlider(min, max);
		slider.setNumTicks(max-1);
		slider.setStepSize(1);
		slider.setNumLabels(0);
		slider.addValueChangeHandler(new ValueChangeHandler<Integer>() {
			@Override
			public void onValueChange(ValueChangeEvent<Integer> event) {
				t.setValue(NumberFormat.getFormat("#").format(event.getValue()));
			}
		});
		
		panel.add(t);
		panel.setCellVerticalAlignment(t, HasVerticalAlignment.ALIGN_BOTTOM);
		panel.add(slider);
		panel.setCellWidth(slider, "80%");

		initWidget(panel);
	}

	@Override
	public TakesValueWithChangeHandlersEditor<Object> asEditor() {
		if (editor == null) {
			editor = TakesValueWithChangeHandlersEditor.of(this, this);
		}
		return editor;
	}

	public IntegerSlider asSlider() {
		return slider;
	}

	@Override
	public HandlerRegistration addKeyUpHandler(KeyUpHandler handler) {
		return asSlider().addKeyUpHandler(handler);
	}

	@Override
	public HandlerRegistration addKeyDownHandler(KeyDownHandler handler) {
		return asSlider().addKeyDownHandler(handler);
	}

	@Override
	public HandlerRegistration addKeyPressHandler(KeyPressHandler handler) {
		return asSlider().addKeyPressHandler(handler);
	}

	@Override
	public int getTabIndex() {
		return asSlider().getTabIndex();
	}

	@Override
	public void setAccessKey(char key) {
		asSlider().setAccessKey(key);
	}

	@Override
	public void setFocus(boolean focused) {
		asSlider().setFocus(focused);
	}

	@Override
	public void setTabIndex(int index) {
		asSlider().setTabIndex(index);
	}

	@Override
	public boolean isEnabled() {
		return asSlider().isEnabled();
	}

	@Override
	public void setEnabled(boolean enabled) {
		asSlider().setEnabled(enabled);
	}

	public Object getValue() {
		return asSlider().getValue();
	}

	@Override
	public void setValue(Object value) {
		asSlider().setValue((Integer)value);
		t.setValue(value.toString());
	}

	@SuppressWarnings({ "rawtypes", "unchecked" })
	@Override
	public HandlerRegistration addValueChangeHandler(ValueChangeHandler handler) {
		return asSlider().addValueChangeHandler(handler);
	}
}