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annotate dwtx/draw2d/TitleBarBorder.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
children
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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.TitleBarBorder;
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14
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15 import dwt.dwthelper.utils;
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16
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17
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18
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19 import dwt.graphics.Color;
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20 import dwtx.draw2d.geometry.Insets;
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21 import dwtx.draw2d.geometry.Rectangle;
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22 import dwtx.draw2d.AbstractLabeledBorder;
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23 import dwtx.draw2d.IFigure;
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24 import dwtx.draw2d.Graphics;
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25 import dwtx.draw2d.ColorConstants;
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26 import dwtx.draw2d.PositionConstants;
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27
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28 /**
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29 * Border provides a title bar on the Figure for which this is the border of. Generally
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30 * used in conjunction with other borders to create window-like effects. Also provides for
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31 * alignment of the text in the bar.
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32 *
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33 * @see FrameBorder
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34 */
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35 public class TitleBarBorder
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36 : AbstractLabeledBorder
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37 {
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38
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39 private static Color defaultColor_;
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40 private static Color defaultColor(){
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41 if( defaultColor_ is null ){
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42 synchronized( TitleBarBorder.classinfo ){
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43 if( defaultColor_ is null ){
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44 defaultColor_ = ColorConstants.menuBackgroundSelected;
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45 }
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46 }
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47 }
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48 return defaultColor_;
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49 }
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50
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51 private int textAlignment;
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52 private Insets padding;
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53 private Color fillColor;
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54
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55 /**
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56 * Constructs a TitleBarBorder with its label set to the name of this class.
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57 *
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58 * @since 2.0
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59 */
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60 public this() {
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61 textAlignment = PositionConstants.LEFT;
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62 padding = new Insets(1, 3, 2, 2);
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63 fillColor = defaultColor;
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64 }
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65
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66 /**
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67 * Constructs a TitleBarBorder with its label set to the passed String.
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68 *
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69 * @param s text of the label
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70 * @since 2.0
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71 */
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72 public this(String s) {
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73 this();
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74 setLabel(s);
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75 }
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76
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77 /**
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78 * Calculates and returns the Insets for this border.
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79 *
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80 * @param figure the figure on which Insets calculations are based
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81 * @return the calculated Insets
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82 * @since 2.0
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83 */
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84 protected Insets calculateInsets(IFigure figure) {
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85 return new Insets(getTextExtents(figure).height + padding.getHeight(), 0, 0, 0);
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86 }
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87
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88 /**
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89 * Returns the background Color of this TitleBarBorder.
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90 * @return the background color
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91 * @since 2.0
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92 */
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93 protected Color getBackgroundColor() {
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94 return fillColor;
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95 }
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96
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97 /**
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98 * Returns this TitleBarBorder's padding. Padding provides spacing along the sides of the
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99 * TitleBarBorder. The default value is no padding along all sides.
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100 *
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101 * @return the Insets representing the space along the sides of the TitleBarBorder
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102 * @since 2.0
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103 */
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104 protected Insets getPadding() {
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105 return padding;
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106 }
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107
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108 /**
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109 * Returns the alignment of the text in the title bar. Possible values are
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110 * {@link PositionConstants#LEFT}, {@link PositionConstants#CENTER} and
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111 * {@link PositionConstants#RIGHT}.
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112 *
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113 * @return the text alignment
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114 * @since 2.0
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115 */
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116 public int getTextAlignment() {
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117 return textAlignment;
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118 }
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119
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120 /**
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121 * Returns <code>true</code> thereby filling up all the contents within its boundaries,
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122 * eleminating the need by the figure to clip the boundaries and do the same.
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123 *
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124 * @see Border#isOpaque()
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125 */
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126 public bool isOpaque() {
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127 return true;
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128 }
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129
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130 /**
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131 * @see Border#paint(IFigure, Graphics, Insets)
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132 */
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133 public void paint(IFigure figure, Graphics g, Insets insets) {
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134 tempRect.setBounds(getPaintRectangle(figure, insets));
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135 Rectangle rec = tempRect;
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136 rec.height = Math.min(rec.height, getTextExtents(figure).height + padding.getHeight());
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137 g.clipRect(rec);
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138 g.setBackgroundColor(fillColor);
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139 g.fillRectangle(rec);
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140
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141 int x = rec.x + padding.left;
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142 int y = rec.y + padding.top;
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143
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144 int textWidth = getTextExtents(figure).width;
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145 int freeSpace = rec.width - padding.getWidth() - textWidth;
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146
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147 if (getTextAlignment() is PositionConstants.CENTER)
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148 freeSpace /= 2;
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149 if (getTextAlignment() !is PositionConstants.LEFT)
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150 x += freeSpace;
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151
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152 g.setFont(getFont(figure));
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153 g.setForegroundColor(getTextColor());
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154 g.drawString(getLabel(), x, y);
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155 }
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156
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157 /**
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158 * Sets the background color of the area within the boundaries of this border. This is
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159 * required as this border takes responsibility for filling up the region, as
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160 * TitleBarBorders are always opaque.
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161 *
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162 * @param color the background color
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163 * @since 2.0
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164 */
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165 public void setBackgroundColor(Color color) {
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166 fillColor = color;
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167 }
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168
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169 /**
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170 * Sets the padding space to be applied on all sides of the border. The default value is
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171 * no padding on all sides.
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172 *
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173 * @param all the value of the padding on all sides
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174 * @since 2.0
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175 */
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176 public void setPadding(int all) {
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177 padding = new Insets(all);
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178 invalidate();
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179 }
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180
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181 /**
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182 * Sets the padding space of this TitleBarBorder to the passed value. The default value is
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183 * no padding on all sides.
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184 *
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185 * @param pad the padding
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186 * @since 2.0
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187 */
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188 public void setPadding(Insets pad) {
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189 padding = pad; invalidate();
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190 }
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191
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192 /**
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193 * Sets the alignment of the text in the title bar. Possible values are
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194 * {@link PositionConstants#LEFT}, {@link PositionConstants#CENTER} and
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195 * {@link PositionConstants#RIGHT}.
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196 *
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197 * @param align the new text alignment
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198 * @since 2.0
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199 */
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200 public void setTextAlignment(int align_) {
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201 textAlignment = align_;
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202 }
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203
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204 }