org.eclipse.nebula.widgets.nattable.core/src/org/eclipse/nebula/widgets/nattable/hover/config/ColumnHeaderResizeHoverBindings.java

/*******************************************************************************
 * Copyright (c) 2012, 2020 Original authors and others.
 *
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Original authors and others - initial API and implementation
 ******************************************************************************/
package org.eclipse.nebula.widgets.nattable.hover.config;

import org.eclipse.nebula.widgets.nattable.config.AbstractUiBindingConfiguration;
import org.eclipse.nebula.widgets.nattable.grid.GridRegion;
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.resize.action.AutoResizeColumnAction;
import org.eclipse.nebula.widgets.nattable.resize.action.ColumnResizeCursorAction;
import org.eclipse.nebula.widgets.nattable.resize.event.ColumnResizeEventMatcher;
import org.eclipse.nebula.widgets.nattable.resize.mode.ColumnResizeDragMode;
import org.eclipse.nebula.widgets.nattable.ui.action.NoOpMouseAction;
import org.eclipse.nebula.widgets.nattable.ui.binding.UiBindingRegistry;
import org.eclipse.nebula.widgets.nattable.ui.matcher.MouseEventMatcher;
import org.eclipse.swt.SWT;

public class ColumnHeaderResizeHoverBindings 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 ColumnHeaderResizeHoverBindings(HoverLayer layer) {
        this.layer = layer;
    }

    @Override
    public void configureUiBindings(UiBindingRegistry uiBindingRegistry) {
        // Mouse move - Show resize cursor
        uiBindingRegistry.registerFirstMouseMoveBinding(
                new ColumnResizeEventMatcher(SWT.NONE,
                        GridRegion.COLUMN_HEADER, 0),
                new ColumnResizeCursorAction());
        // apply a hover styling on moving the mouse over a NatTable and clear
        // the cursor
        uiBindingRegistry.registerMouseMoveBinding(new MouseEventMatcher(
                GridRegion.COLUMN_HEADER), new HoverStylingAction(this.layer));

        // clear any hover styling if the mouse is moved out of a NatTable
        // region
        uiBindingRegistry.registerMouseMoveBinding((natTable, event, regionLabels) -> ((natTable != null && regionLabels == null) || regionLabels != null
                && regionLabels.hasLabel(GridRegion.CORNER)), new ClearHoverStylingAction());

        // clear any hover styling if the mouse is moved out of the NatTable
        // area
        // always return true for the matcher because it is only asked in case
        // the mouse exits the NatTable client area, therefore further checks
        // are not necessary
        uiBindingRegistry.registerMouseExitBinding((natTable, event, regionLabels) -> true, new ClearHoverStylingAction());

        // Column resize
        uiBindingRegistry.registerFirstMouseDragMode(
                new ColumnResizeEventMatcher(SWT.NONE,
                        GridRegion.COLUMN_HEADER, 1),
                new ColumnResizeDragMode());

        uiBindingRegistry.registerDoubleClickBinding(
                new ColumnResizeEventMatcher(SWT.NONE,
                        GridRegion.COLUMN_HEADER, 1),
                new AutoResizeColumnAction());
        uiBindingRegistry.registerSingleClickBinding(
                new ColumnResizeEventMatcher(SWT.NONE,
                        GridRegion.COLUMN_HEADER, 1),
                new NoOpMouseAction());
    }

}