de.walware.rj.eclient.graphics.RGraphicPage.java Source code

Introduction

Here is the source code for de.walware.rj.eclient.graphics.RGraphicPage.java

Source

/*=============================================================================#
 # Copyright (c) 2009-2015 Stephan Wahlbrink (WalWare.de) and others.
 # 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
 # 
 # Contributors:
 #     Stephan Wahlbrink - initial API and implementation
 #=============================================================================*/

package de.walware.rj.eclient.graphics;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.Locale;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler2;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.action.StatusLineContributionItem;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IWorkbenchCommandConstants;
import org.eclipse.ui.handlers.IHandlerService;
import org.eclipse.ui.part.Page;
import org.eclipse.ui.services.IServiceLocator;

import de.walware.ecommons.IStatusChangeListener;
import de.walware.ecommons.ui.SharedUIResources;
import de.walware.ecommons.ui.util.UIAccess;

import de.walware.rj.eclient.graphics.RGraphicCompositeActionSet.LocationListener;

/**
 * Single graphic page for {@link PageBookRGraphicView}.
 */
public class RGraphicPage extends Page implements IStatusChangeListener {

    private final IERGraphic fGraphic;

    private RGraphicComposite fControl;

    private RGraphicCompositeActionSet fActions;

    private StatusLineContributionItem fLocationStatusItem;
    private String fLocationStatusText;
    private LocationListener fMouseLocationListener;

    public RGraphicPage(final IERGraphic graphic) {
        fGraphic = graphic;
    }

    protected IERGraphic getGraphic() {
        return fGraphic;
    }

    protected void init(final StatusLineContributionItem locationStatusItem) {
        fLocationStatusItem = locationStatusItem;
    }

    @Override
    public void createControl(final Composite parent) {
        fControl = new RGraphicComposite(parent, fGraphic);

        initActions(getSite(), getSite().getActionBars());

        fGraphic.addMessageListener(this);
        statusChanged(fGraphic.getMessage());
    }

    protected void initActions(final IServiceLocator serviceLocator, final IActionBars actionBars) {
        final IHandlerService handlerService = (IHandlerService) serviceLocator.getService(IHandlerService.class);

        final IHandler2 refreshHandler = new AbstractHandler() {
            @Override
            public Object execute(final ExecutionEvent event) throws ExecutionException {
                fControl.redrawGraphic();
                return null;
            }
        };
        handlerService.activateHandler(IWorkbenchCommandConstants.FILE_REFRESH, refreshHandler);

        final IToolBarManager toolBar = actionBars.getToolBarManager();
        toolBar.insertBefore(SharedUIResources.ADDITIONS_MENU_ID,
                new Separator(RGraphicCompositeActionSet.CONTEXT_MENU_GROUP_ID));
        toolBar.insertBefore(SharedUIResources.ADDITIONS_MENU_ID,
                new Separator(RGraphicCompositeActionSet.SIZE_MENU_GROUP_ID));

        fActions = createActionSet();
        fActions.setGraphic(fGraphic);
        fActions.initActions(serviceLocator);
        fActions.contributeToActionsBars(serviceLocator, actionBars);

        // Can find wrong item from other view
        //      fLocationStatusItem = (StatusLineContributionItem) actionBars.getStatusLineManager().find(RGraphicCompositeActionSet.POSITION_STATUSLINE_ITEM_ID);
        if (fLocationStatusItem != null) {
            fMouseLocationListener = new LocationListener() {

                final DecimalFormat format = new DecimalFormat("0.0####", new DecimalFormatSymbols(Locale.US)); //$NON-NLS-1$

                @Override
                public void loading() {
                    if (fLocationStatusItem != null) {
                        fLocationStatusItem.setText("..."); //$NON-NLS-1$
                    }
                }

                @Override
                public void located(final double x, final double y) {
                    if (fLocationStatusItem != null && UIAccess.isOkToUse(fControl)) {
                        if (Double.isNaN(x) || Double.isInfinite(x) || Double.isNaN(y) || Double.isInfinite(y)) {
                            fLocationStatusText = "NA"; //$NON-NLS-1$
                        } else {
                            final StringBuilder sb = new StringBuilder(32);
                            sb.append('(');
                            sb.append(format.format(x));
                            sb.append(", "); //$NON-NLS-1$
                            sb.append(format.format(y));
                            sb.append(')');
                            fLocationStatusText = sb.toString();
                        }
                        fLocationStatusItem.setText(fLocationStatusText);
                    }
                }
            };
            fActions.addMouseClickLocationListener(fMouseLocationListener);
        }
    }

    protected RGraphicCompositeActionSet createActionSet() {
        return new RGraphicCompositeActionSet(fControl);
    }

    @Override
    public void statusChanged(final IStatus status) {
        final String message;
        if (status.getSeverity() > 0) {
            message = status.getMessage();
        } else {
            message = null;
        }
        getSite().getActionBars().getStatusLineManager().setMessage(message);
    }

    @Override
    public Control getControl() {
        return fControl;
    }

    protected RGraphicComposite getGraphicComposite() {
        return fControl;
    }

    @Override
    public void setFocus() {
        fControl.setFocus();
    }

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

}