org.eclipse.titan.log.viewer.views.msc.ui.actions.ZoomAction.java Source code

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Here is the source code for org.eclipse.titan.log.viewer.views.msc.ui.actions.ZoomAction.java

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/******************************************************************************
 * Copyright (c) 2000-2016 Ericsson Telecom AB
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 ******************************************************************************/
package org.eclipse.titan.log.viewer.views.msc.ui.actions;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ActionContributionItem;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.widgets.Display;
import org.eclipse.titan.log.viewer.Activator;
import org.eclipse.titan.log.viewer.views.MSCView;
import org.eclipse.titan.log.viewer.views.msc.ui.view.MSCWidget;
import org.eclipse.titan.log.viewer.views.msc.util.MSCConstants;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IViewPart;

/**
 * Zoom action
 *
 */
public class ZoomAction extends Action {

    private MSCWidget viewer = null;
    private MSCView view = null;
    private boolean lastZoomIn = false;
    private Cursor zoomIn = null;
    private Cursor zoomOut = null;

    public ZoomAction(final IViewPart view) {
        super("", AS_RADIO_BUTTON); //$NON-NLS-1$
        this.view = (MSCView) view;
        this.viewer = (this.view).getMSCWidget();
        this.zoomIn = new Cursor(Display.getCurrent(),
                Activator.getImageDescriptor(MSCConstants.ICON_ZOOM_IN_SOURCE).getImageData(),
                Activator.getImageDescriptor(MSCConstants.ICON_ZOOM_MASK).getImageData(), 0, 0);
        this.zoomOut = new Cursor(Display.getCurrent(),
                Activator.getImageDescriptor(MSCConstants.ICON_ZOOM_OUT_SOURCE).getImageData(),
                Activator.getImageDescriptor(MSCConstants.ICON_ZOOM_MASK).getImageData(), 0, 0);
    }

    @Override
    public void run() {

        // Zoom in
        if (getId().equals(MSCConstants.ID_ZOOM_OUT)) {
            this.viewer.setZoomOutMode(isChecked());
            if (isChecked()) {
                this.viewer.setCursor(this.zoomOut);
                setActionChecked(MSCConstants.ID_NO_ZOOM, false);
            } else {
                this.viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW));
                setActionChecked(MSCConstants.ID_NO_ZOOM, true);
            }
            // Zoom out
        } else if (getId().equals(MSCConstants.ID_ZOOM_IN)) {
            if (this.lastZoomIn == isChecked()) {
                setChecked(!isChecked());
            }
            this.viewer.setZoomInMode(isChecked());
            this.lastZoomIn = isChecked();
            if (isChecked()) {
                this.viewer.setCursor(this.zoomIn);
                setActionChecked(MSCConstants.ID_NO_ZOOM, false);
            } else {
                this.viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW));
                setActionChecked(MSCConstants.ID_NO_ZOOM, true);
            }
            // Reset zoom
        } else if (getId().equals(MSCConstants.ID_RESET_ZOOM)) {
            this.viewer.resetZoomFactor();
            // The reset action is a radio button only to un-check the zoom in and out button
            // when it is clicked. This avoid adding code to do it manually
            // We only have to force it to false every time
            setChecked(false);
            setActionChecked(MSCConstants.ID_NO_ZOOM, true);
            // No zoom
        } else if (getId().equals(MSCConstants.ID_NO_ZOOM)) {
            setChecked(true);
            this.viewer.setZoomInMode(false);
            this.viewer.setZoomOutMode(false);
            this.viewer.setCursor(new Cursor(Display.getDefault(), SWT.CURSOR_ARROW));
        }
    }

    public void setActionChecked(final String id, final boolean checked) {
        IActionBars bar = this.view.getViewSite().getActionBars();
        if (bar == null) {
            return;
        }
        IToolBarManager barManager = bar.getToolBarManager();
        if (barManager == null) {
            return;
        }
        IContributionItem nextPage = barManager.find(id);
        if ((nextPage != null) && (nextPage instanceof ActionContributionItem)) {
            IAction action = ((ActionContributionItem) nextPage).getAction();
            if (action != null) {
                action.setChecked(checked);
            }
        }
    }
}