uk.ac.stfc.isis.ibex.ui.configserver.editing.ButtonCellLabelProvider.java Source code

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Here is the source code for uk.ac.stfc.isis.ibex.ui.configserver.editing.ButtonCellLabelProvider.java

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/*
* This file is part of the ISIS IBEX application.
* Copyright (C) 2012-2015 Science & Technology Facilities Council.
* All rights reserved.
*
* This program is distributed in the hope that it will be useful.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution.
* EXCEPT AS EXPRESSLY SET FORTH IN THE ECLIPSE PUBLIC LICENSE V1.0, THE PROGRAM 
* AND ACCOMPANYING MATERIALS ARE PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES 
* OR CONDITIONS OF ANY KIND.  See the Eclipse Public License v1.0 for more details.
*
* You should have received a copy of the Eclipse Public License v1.0
* along with this program; if not, you can obtain a copy from
* https://www.eclipse.org/org/documents/epl-v10.php or 
* http://opensource.org/licenses/eclipse-1.0.php
*/

package uk.ac.stfc.isis.ibex.ui.configserver.editing;

import java.util.HashMap;
import java.util.Map;

import org.eclipse.core.databinding.observable.map.IObservableMap;
import org.eclipse.jface.databinding.viewers.ObservableMapCellLabelProvider;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TableEditor;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.TableItem;

public abstract class ButtonCellLabelProvider extends ObservableMapCellLabelProvider {

    private final Map<ViewerCell, Button> cellButtons = new HashMap<>();
    private final Map<ViewerCell, TableEditor> cellEditors = new HashMap<>();

    protected ButtonCellLabelProvider(IObservableMap[] attributeMaps) {
        super(attributeMaps);
    }

    protected Button getButton(ViewerCell cell, int style) {
        return cellButtons.containsKey(cell) ? cellButtons.get(cell) : createButton(cell, style);
    }

    @Override
    public void dispose() {
        //super.dispose();
        for (Button button : cellButtons.values()) {
            button.dispose();
        }

        for (TableEditor editor : cellEditors.values()) {
            editor.dispose();
        }

        cellButtons.clear();
    }

    private Button createButton(final ViewerCell cell, int style) {
        Button button = new Button(composite(cell), style);
        button.setText("");
        button.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

        setEditor(cell, button);
        cellButtons.put(cell, button);

        return button;
    }

    private Composite composite(ViewerCell cell) {
        return (Composite) cell.getControl();
    }

    private void setEditor(ViewerCell cell, Button button) {
        TableItem item = (TableItem) cell.getItem();
        TableEditor editor = new TableEditor(item.getParent());
        editor.horizontalAlignment = SWT.FILL;
        editor.verticalAlignment = SWT.FILL;
        editor.grabHorizontal = true;
        editor.grabVertical = true;
        editor.setEditor(button, item, cell.getColumnIndex());
        editor.layout();

        cellEditors.put(cell, editor);
    }
}