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1 /*******************************************************************************
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2 * Copyright (c) 2007 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.text.AbstractReusableInformationControlCreator;
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14
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15 import dwt.dwthelper.utils;
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16
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17 import java.util.HashMap;
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18 import java.util.Map;
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19
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20 import dwt.events.DisposeEvent;
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21 import dwt.events.DisposeListener;
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22 import dwt.widgets.Composite;
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23 import dwt.widgets.Shell;
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24
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25
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26 /**
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27 * Abstract class for a reusable information control creators.
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28 *
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29 * @since 3.3
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30 */
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31 public abstract class AbstractReusableInformationControlCreator : IInformationControlCreator, IInformationControlCreatorExtension, DisposeListener {
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32
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33 private Map fInformationControls= new HashMap();
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34
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35 /**
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36 * Creates the control.
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37 *
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38 * @param parent the parent shell
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39 * @return the created information control
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40 */
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41 protected abstract IInformationControl doCreateInformationControl(Shell parent);
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42
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43 /*
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44 * @see dwtx.jface.text.IInformationControlCreator#createInformationControl(dwt.widgets.Shell)
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45 */
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46 public IInformationControl createInformationControl(Shell parent) {
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47 IInformationControl control= (IInformationControl)fInformationControls.get(parent);
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48 if (control is null) {
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49 control= doCreateInformationControl(parent);
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50 control.addDisposeListener(this);
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51 fInformationControls.put(parent, control);
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52 }
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53 return control;
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54 }
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55
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56 /*
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57 * @see dwt.events.DisposeListener#widgetDisposed(dwt.events.DisposeEvent)
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58 */
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59 public void widgetDisposed(DisposeEvent e) {
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60 Composite parent= null;
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61 if (e.widget instanceof Shell)
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62 parent= ((Shell)e.widget).getParent();
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63 if (parent instanceof Shell)
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64 fInformationControls.remove(parent);
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65 }
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66
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67
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68 /*
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69 * @see dwtx.jface.text.IInformationControlCreatorExtension#canReuse(dwtx.jface.text.IInformationControl)
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70 */
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71 public bool canReuse(IInformationControl control) {
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72 return fInformationControls.containsValue(control);
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73 }
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74
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75 /*
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76 * @see dwtx.jface.text.IInformationControlCreatorExtension#canReplace(dwtx.jface.text.IInformationControlCreator)
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77 */
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78 public bool canReplace(IInformationControlCreator creator) {
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79 return creator.getClass() is getClass();
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80 }
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81 }
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