org.openscada.ui.chart.viewer.controller.actions.ScaleActionController.java Source code

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Here is the source code for org.openscada.ui.chart.viewer.controller.actions.ScaleActionController.java

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/*
 * This file is part of the openSCADA project
 * Copyright (C) 2011-2012 TH4 SYSTEMS GmbH (http://th4-systems.com)
 *
 * openSCADA is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * openSCADA 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 Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with openSCADA. If not, see
 * <http://opensource.org/licenses/lgpl-3.0.html> for a copy of the LGPLv3 License.
 */

package org.openscada.ui.chart.viewer.controller.actions;

import java.util.concurrent.TimeUnit;

import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.beans.PojoObservables;
import org.eclipse.emf.databinding.EMFObservables;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.openscada.ui.chart.model.ChartModel.ChartPackage;
import org.openscada.ui.chart.model.ChartModel.ScaleAction;
import org.openscada.ui.chart.viewer.ChartContext;
import org.openscada.ui.chart.viewer.XAxisViewer;
import org.openscada.ui.chart.viewer.controller.ChartController;
import org.openscada.ui.chart.viewer.controller.ControllerManager;

public class ScaleActionController extends AbstractXAxisController implements ChartController {

    private Button button;

    private long milliseconds;

    public ScaleActionController(final ControllerManager controllerManager, final ChartContext chartContext,
            final ScaleAction controller) {
        super(controllerManager.getContext(), chartContext, controller);

        final DataBindingContext ctx = controllerManager.getContext();

        final Composite space = chartContext.getExtensionSpaceProvider().getExtensionSpace();
        if (space != null) {
            this.button = new Button(space, SWT.PUSH);
            this.button.addSelectionListener(new SelectionAdapter() {
                @Override
                public void widgetSelected(final SelectionEvent e) {
                    action();
                };
            });
            addBinding(ctx.bindValue(PojoObservables.observeValue(this, "milliseconds"), //$NON-NLS-1$
                    EMFObservables.observeValue(controller, ChartPackage.Literals.SCALE_ACTION__TIMESPAN)));
            addBinding(ctx.bindValue(SWTObservables.observeText(this.button),
                    EMFObservables.observeValue(controller, ChartPackage.Literals.SCALE_ACTION__LABEL)));
            addBinding(ctx.bindValue(SWTObservables.observeTooltipText(this.button),
                    EMFObservables.observeValue(controller, ChartPackage.Literals.SCALE_ACTION__DESCRIPTION)));
            space.layout();
        } else {
            this.button = null;
        }
    }

    protected void action() {
        for (final XAxisViewer viewer : getCurrentViewers()) {
            viewer.getAxis().setByTimespan(this.milliseconds, TimeUnit.MILLISECONDS);
        }
    }

    @Override
    public void dispose() {
        if (this.button != null) {
            this.button.dispose();
        }
        super.dispose();
    }

    public void setMilliseconds(final long milliseconds) {
        this.milliseconds = milliseconds;
    }

    public long getMilliseconds() {
        return this.milliseconds;
    }

}