KeyboardOperationSelectTopLeftCell.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.uberfire.ext.wires.core.grids.client.widget.grid.impl;

import com.google.gwt.event.dom.client.KeyCodes;
import org.uberfire.ext.wires.core.grids.client.model.GridData;
import org.uberfire.ext.wires.core.grids.client.widget.grid.GridWidget;
import org.uberfire.ext.wires.core.grids.client.widget.layer.GridLayer;

public class KeyboardOperationSelectTopLeftCell extends BaseKeyboardOperation {

    public KeyboardOperationSelectTopLeftCell(final GridLayer gridLayer) {
        super(gridLayer);
    }

    @Override
    public int getKeyCode() {
        return KeyCodes.KEY_HOME;
    }

    @Override
    @SuppressWarnings("unused")
    public boolean perform(final GridWidget gridWidget,
                           final boolean isShiftKeyDown,
                           final boolean isControlKeyDown) {
        final boolean redraw = selectTopLeftCell(gridWidget);
        scrollSelectedCellIntoView(gridWidget);
        return redraw;
    }

    protected boolean selectTopLeftCell(final GridWidget gridWidget) {
        final GridData gridModel = gridWidget.getModel();
        final int rowCount = gridModel.getRowCount();
        final int columnCount = gridModel.getColumnCount();
        if (rowCount == 0 || columnCount == 0) {
            return false;
        }
        return gridWidget.selectCell(0,
                                     0,
                                     false,
                                     false);
    }
}