/*******************************************************************************
* Copyright (c) 2013 Dirk Fauth and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Dirk Fauth <dirk.fauth@gmail.com> - initial API and implementation
*******************************************************************************/
package org.eclipse.nebula.widgets.nattable.hover.config;
import org.eclipse.nebula.widgets.nattable.NatTable;
import org.eclipse.nebula.widgets.nattable.config.AbstractUiBindingConfiguration;
import org.eclipse.nebula.widgets.nattable.hover.HoverLayer;
import org.eclipse.nebula.widgets.nattable.hover.action.ClearHoverStylingAction;
import org.eclipse.nebula.widgets.nattable.hover.action.HoverStylingAction;
import org.eclipse.nebula.widgets.nattable.layer.LabelStack;
import org.eclipse.nebula.widgets.nattable.ui.binding.UiBindingRegistry;
import org.eclipse.nebula.widgets.nattable.ui.matcher.IMouseEventMatcher;
import org.eclipse.swt.events.MouseEvent;
/**
* UI bindings for applying and clearing styles when moving the mouse over
* NatTable cells.
* <p>
* This configuration should be used if a table without headers is rendered. The
* reason for this is that the client area is the whole available area in such a
* case, so if the area is bigger than the rendered table, the hovering wouldn't
* be removed if the mouse cursor is moved out of the cells but still in the
* area.
*
* @author Dirk Fauth
*
* @see HoverLayer
*/
public class SimpleHoverStylingBindings extends AbstractUiBindingConfiguration {
/**
* The HoverLayer that is used to add hover styling.
*/
private final HoverLayer layer;
/**
* @param layer
* The HoverLayer that is used to add hover styling.
*/
public SimpleHoverStylingBindings(HoverLayer layer) {
this.layer = layer;
}
@Override
public void configureUiBindings(UiBindingRegistry uiBindingRegistry) {
// apply a hover styling on moving the mouse over a NatTable
uiBindingRegistry.registerFirstMouseMoveBinding(
new IMouseEventMatcher() {
@Override
public boolean matches(NatTable natTable, MouseEvent event,
LabelStack regionLabels) {
int width = layer.getPreferredWidth();
int height = layer.getPreferredHeight();
return ((event.x > 0 && event.x < width) && (event.y > 0 && event.y < height));
}
}, new HoverStylingAction(layer));
// clear any hover styling if the mouse is moved out of the region area
uiBindingRegistry.registerMouseMoveBinding(new IMouseEventMatcher() {
@Override
public boolean matches(NatTable natTable, MouseEvent event,
LabelStack regionLabels) {
int width = layer.getPreferredWidth();
int height = layer.getPreferredHeight();
return ((event.x < 0 || event.x > width) || (event.y < 0 || event.y > height));
}
}, new ClearHoverStylingAction());
// clear any hover styling if the mouse is moved out of a NatTable
// region
uiBindingRegistry.registerMouseMoveBinding(new IMouseEventMatcher() {
@Override
public boolean matches(NatTable natTable, MouseEvent event,
LabelStack regionLabels) {
return (natTable != null && regionLabels == null);
}
}, new ClearHoverStylingAction());
// clear any hover styling if the mouse is moved out of the NatTable
// area
uiBindingRegistry.registerMouseExitBinding(new IMouseEventMatcher() {
@Override
public boolean matches(NatTable natTable, MouseEvent event,
LabelStack regionLabels) {
// always return true because this matcher is only asked in case
// the mouse
// exits the NatTable client area, therefore further checks are
// not necessary
return true;
}
}, new ClearHoverStylingAction());
}
}