com.netxforge.screens.editing.base.actions.TableViewerWithState.java Source code

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Here is the source code for com.netxforge.screens.editing.base.actions.TableViewerWithState.java

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/*******************************************************************************
 * Copyright (c) 23 mei 2013 NetXForge.
 * 
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details. You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>
 * 
 * Contributors: Christophe Bouhier - initial API and implementation and/or
 * initial documentation
 *******************************************************************************/
package com.netxforge.screens.editing.base.actions;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;

/**
 * The default StructuredViewer abstracts away the state of the selectionEvent.
 * Things like {@link SelectionEvent#stateMask } get lost.
 * 
 * @author Christophe Bouhier
 */
public class TableViewerWithState extends TableViewer {

    public TableViewerWithState(Composite parent) {
        super(parent);
    }

    public TableViewerWithState(Composite content, int i) {
        super(content, i);
    }

    @Override
    protected void handleSelect(SelectionEvent event) {

        int stateMask = event.stateMask;

        Control control = getControl();
        if (control != null && !control.isDisposed()) {
            updateSelection(stateMask, getSelection());
        }
    }

    protected void updateSelection(int stateMask, ISelection selection) {
        StateSelectionChangedEvent event = new StateSelectionChangedEvent(this, selection);
        event.setStateMask(stateMask);
        fireSelectionChanged(event);
    }

    public class StateSelectionChangedEvent extends SelectionChangedEvent {

        /**
         * 
         */
        private static final long serialVersionUID = -7778193660507880813L;

        private int stateMask = -1;

        public StateSelectionChangedEvent(ISelectionProvider source, ISelection selection) {
            super(source, selection);
        }

        public int getStateMask() {
            return stateMask;
        }

        public void setStateMask(int stateMask) {
            this.stateMask = stateMask;
        }

        public boolean isState_CTRL() {
            return (stateMask & SWT.CTRL) != 0;
        }

        public boolean isState_ALT() {
            return (stateMask & SWT.ALT) != 0;
        }

        public boolean isState_SHIFT() {
            return (stateMask & SWT.SHIFT) != 0;
        }

        public boolean isState_COMMAND() {
            return (stateMask & SWT.COMMAND) != 0;
        }
    }

}