com.subgraph.vega.ui.http.conditions.MatchActionComboViewer.java Source code

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Here is the source code for com.subgraph.vega.ui.http.conditions.MatchActionComboViewer.java

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/*******************************************************************************
 * Copyright (c) 2011 Subgraph.
 * 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:
 *     Subgraph - initial API and implementation
 ******************************************************************************/
package com.subgraph.vega.ui.http.conditions;

import java.util.List;

import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;

import com.subgraph.vega.api.model.conditions.match.IHttpConditionMatchAction;

public class MatchActionComboViewer extends ComboViewer {

    private MatchActionArgumentPanel argumentPanel;

    public MatchActionComboViewer(Composite parent) {
        super(parent, SWT.READ_ONLY);
        setContentProvider(new ArrayContentProvider());
        setLabelProvider(createLabelProvider());
        addSelectionChangedListener(createSelectionChangedListener());
    }

    public void setMatchActionArgumentPanel(MatchActionArgumentPanel argumentPanel) {
        this.argumentPanel = argumentPanel;
        setArgumentPanelBySelection(getSelection());
    }

    private ILabelProvider createLabelProvider() {
        return new LabelProvider() {
            @Override
            public String getText(Object element) {
                return ((IHttpConditionMatchAction) element).getLabel();
            }
        };
    }

    private ISelectionChangedListener createSelectionChangedListener() {
        return new ISelectionChangedListener() {
            @Override
            public void selectionChanged(SelectionChangedEvent event) {
                setArgumentPanelBySelection(event.getSelection());
            }
        };
    }

    public void reset() {
        final Object element = getElementAt(0);
        if (element != null)
            setSelection(new StructuredSelection(element));
    }

    public void setMatchActionInput(List<IHttpConditionMatchAction> matchActions) {
        setInput(matchActions.toArray());
        reset();
    }

    public IHttpConditionMatchAction getSelectedMatchAction() {
        final IStructuredSelection selection = (IStructuredSelection) getSelection();
        if (selection.isEmpty())
            return null;
        return (IHttpConditionMatchAction) selection.getFirstElement();
    }

    private void setArgumentPanelBySelection(ISelection selection) {
        final IStructuredSelection ss = (IStructuredSelection) selection;
        if (argumentPanel != null && !ss.isEmpty() && (ss.getFirstElement() instanceof IHttpConditionMatchAction))
            argumentPanel.displayPanelForMatchAction((IHttpConditionMatchAction) ss.getFirstElement());
    }
}