org.eclipse.mat.ui.internal.acquire.ProviderArgumentsWizardPage.java Source code

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Here is the source code for org.eclipse.mat.ui.internal.acquire.ProviderArgumentsWizardPage.java

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/*******************************************************************************
 * Copyright (c) 2010, 2012 SAP AG 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:
 *    SAP AG - initial API and implementation
 *    IBM Corporation - refactor for new/import wizard
 *******************************************************************************/
package org.eclipse.mat.ui.internal.acquire;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IMessageProvider;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.mat.query.registry.AnnotatedObjectArgumentsSet;
import org.eclipse.mat.ui.Messages;
import org.eclipse.mat.ui.internal.acquire.AcquireDialog.ProcessSelectionListener;
import org.eclipse.mat.ui.internal.acquire.ProviderArgumentsTable.ITableListener;
import org.eclipse.mat.ui.internal.browser.QueryContextHelp;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.ui.PlatformUI;

public class ProviderArgumentsWizardPage extends WizardPage implements ITableListener, ProcessSelectionListener {
    private ProviderArgumentsTable table;

    private AcquireDialog acquireDialog;
    private QueryContextHelp helpPopup;

    public ProviderArgumentsWizardPage(AcquireDialog acquireDialog) {
        super(Messages.ProviderArgumentsWizzardPage_HeapDumpProviderArgumentsTitle,
                Messages.ProviderArgumentsWizzardPage_HeapDumpProviderArgumentsTitle, null);
        this.acquireDialog = acquireDialog;
    }

    public void createControl(Composite parent) {
        ScrolledComposite composite = new ScrolledComposite(parent, SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER);

        composite.setLayout(new GridLayout());
        composite.setExpandHorizontal(true);
        composite.setExpandVertical(true);
        GridDataFactory.fillDefaults().grab(true, true).applyTo(composite);

        Composite tableComposite = new Composite(composite, SWT.NONE);
        GridDataFactory.fillDefaults().grab(true, true).indent(0, 0).applyTo(tableComposite);

        Dialog.applyDialogFont(composite);
        table = new ProviderArgumentsTable(tableComposite, SWT.FULL_SELECTION | SWT.SINGLE);
        table.addListener(this);

        tableComposite.layout();
        tableComposite.pack();

        PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, "org.eclipse.mat.ui.help.acquire_arguments"); //$NON-NLS-1$
        composite.setContent(tableComposite);
        setControl(composite);

        acquireDialog.addProcessSelectionListener(this);
        table.addListener(this);

        Listener listener = new Listener() {
            public void handleEvent(Event event) {
                relocateHelp(false);
            }
        };
        getShell().addListener(SWT.Resize, listener);
        getShell().addListener(SWT.Move, listener);
    }

    /* package */void updateDescription() {
        setDescription(table.getProviderDescriptor().getName());
        if (isCurrentPage())
            relocateHelp(true);
        getContainer().updateButtons();
    }

    public ProviderArgumentsTable getTable() {
        return table;
    }

    public AnnotatedObjectArgumentsSet getArgumentSet() {
        return table.getArgumentSet();
    }

    public void onInputChanged() {
        updateDescription();
        //      getContainer().updateButtons();
        acquireDialog.updateFileName();
    }

    public void onValueChanged() {
    }

    public void onError(String message) {
        setErrorMessage(message);
        // a work around: calling onFocus ensures a correct update of the error
        // message. Without this call it doesn't update the message correct.
        onFocus(null);
    }

    public void onFocus(String message) {
        if (getErrorMessage() != null)
            setMessage(getErrorMessage(), IMessageProvider.ERROR);
        else if (message != null)
            setMessage(message, IMessageProvider.INFORMATION);
        else
            setMessage(table.getProviderDescriptor().getName());
        getContainer().updateButtons();
    }

    @Override
    public boolean isPageComplete() {
        return table != null && table.getArgumentSet() != null && table.getArgumentSet().isExecutable();
    }

    public void relocateHelp(final boolean create) {
        final AnnotatedObjectArgumentsSet argumentSet = table.getArgumentSet();
        if (argumentSet == null)
            return;

        if (argumentSet.getDescriptor().isHelpAvailable() && //
                (create || (helpPopup != null && helpPopup.getShell() != null))) {
            if (getShell() == null) {
                helpPopup.close();
                return;
            }
            getShell().getDisplay().timerExec(100, new Runnable() {
                public void run() {
                    if (getShell() != null && !getShell().isDisposed()) {
                        Rectangle myBounds = getShell().getBounds();
                        Rectangle helpBounds = new Rectangle(myBounds.x, myBounds.y + myBounds.height,
                                myBounds.width, SWT.DEFAULT);

                        if (helpPopup != null) {
                            if (!create) {
                                helpPopup.resize(helpBounds);
                                return;
                            } else {
                                // Get ready to create a new pop-up with new help text
                                helpPopup.close();
                            }
                        }

                        helpPopup = new QueryContextHelp(getShell(), argumentSet.getDescriptor(), helpBounds);
                        helpPopup.open();
                    }
                }
            });
        }
    }

    public void processSelected(AnnotatedObjectArgumentsSet argumentSet) {
        table.providerSelected(argumentSet);
    }

    public void setVisible(boolean f) {
        if (!f && helpPopup != null) {
            helpPopup.close();
        } else if (f) {
            relocateHelp(true);
        }
        super.setVisible(f);
    }
}