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annotate dwtx/draw2d/SimpleEtchedBorder.d @ 103:2d6540440fe6

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Replace static ctors with lazy init.
author Frank Benoit <benoit@tionex.de>
date Sun, 03 Aug 2008 17:01:51 +0200
parents 95307ad235d9
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 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.draw2d.SimpleEtchedBorder;
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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 dwtx.draw2d.geometry.Insets;
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18 import dwtx.draw2d.geometry.Rectangle;
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19 import dwtx.draw2d.SchemeBorder;
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20 import dwtx.draw2d.Border;
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21 import dwtx.draw2d.IFigure;
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22 import dwtx.draw2d.Graphics;
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23 import dwtx.draw2d.FigureUtilities;
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24
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25 /**
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26 * Provides a two pixel wide constant sized border, having an etched look.
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27 */
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28 public final class SimpleEtchedBorder
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29 : SchemeBorder
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30 {
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31
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32 /** The singleton instance of this class */
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33 private static Border singleton_;
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34
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35 /** The insets */
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36 private static Insets INSETS_;
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37
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38 public static Border singleton(){
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39 if( !initStaticCtor_done ) initStaticCtor();
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40 assert(singleton_);
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41 return singleton_;
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42 }
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43 protected static Insets INSETS(){
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44 if( !initStaticCtor_done ) initStaticCtor();
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45 assert(INSETS_);
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46 return INSETS_;
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47 }
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48
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49 private static bool initStaticCtor_done = false;
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50 private static void initStaticCtor(){
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51 synchronized( SimpleEtchedBorder.classinfo ){
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52 if( !initStaticCtor_done ){
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53 singleton_ = new SimpleEtchedBorder();
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54 INSETS_ = new Insets(2);
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55 initStaticCtor_done = true;
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56 }
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57 }
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58 }
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62
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63 /**
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64 * Constructs a default border having a two pixel wide border.
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65 *
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66 * @since 2.0
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67 */
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68 protected this() { }
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69
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70 /**
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71 * Returns the Insets used by this border. This is a constant value of two pixels in each
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72 * direction.
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73 * @see Border#getInsets(IFigure)
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74 */
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75 public Insets getInsets(IFigure figure) {
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76 return new Insets(INSETS);
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77 }
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78
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79 /**
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80 * Returns the opaque state of this border. This border is opaque and takes responsibility
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81 * to fill the region it encloses.
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82 * @see Border#isOpaque()
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83 */
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84 public bool isOpaque() {
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85 return true;
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86 }
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87
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88 /**
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89 * @see Border#paint(IFigure, Graphics, Insets)
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90 */
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91 public void paint(IFigure figure, Graphics g, Insets insets) {
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92 Rectangle rect = getPaintRectangle(figure, insets);
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93 FigureUtilities.paintEtchedBorder(g, rect);
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94 }
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95
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96 }