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annotate dwt/custom/CBannerLayout.d @ 0:380af2bdd8e5

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Upload of whole dwt tree
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sat, 09 Aug 2008 17:00:02 +0200
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 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 *
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11 * Port to the D Programming language:
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12 * Jacob Carlborg <jacob.carlborg@gmail.com>
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13 *******************************************************************************/
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14 module dwt.custom.CBannerLayout;
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15
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16 import Math = tango.math.Math;
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17
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18 import dwt.DWT;
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19 import dwt.custom.CBanner;
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20 import dwt.graphics.Point;
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21 import dwt.graphics.Rectangle;
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22 import dwt.widgets.Composite;
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23 import dwt.widgets.Control;
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24 import dwt.widgets.Layout;
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25 import dwt.widgets.Scrollable;
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26
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27 /**
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28 * This class provides the layout for CBanner
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29 *
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30 * @see CBanner
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31 */
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32 class CBannerLayout : Layout {
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33
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34 protected Point computeSize (Composite composite, int wHint, int hHint, bool flushCache) {
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35 CBanner banner = cast(CBanner) composite;
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36 Control left = banner.left;
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37 Control right = banner.right;
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38 Control bottom = banner.bottom;
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39 bool showCurve = left !is null && right !is null;
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40 int height = hHint;
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41 int width = wHint;
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42
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43 // Calculate component sizes
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44 Point bottomSize = new Point(0, 0);
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45 if (bottom !is null) {
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46 int trim = computeTrim(bottom);
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47 int w = wHint is DWT.DEFAULT ? DWT.DEFAULT : Math.max(0, width - trim);
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48 bottomSize = computeChildSize(bottom, w, DWT.DEFAULT, flushCache);
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49 }
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50 Point rightSize = new Point(0, 0);
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51 if (right !is null) {
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52 int trim = computeTrim(right);
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53 int w = DWT.DEFAULT;
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54 if (banner.rightWidth !is DWT.DEFAULT) {
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55 w = banner.rightWidth - trim;
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56 if (left !is null) {
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57 w = Math.min(w, width - banner.curve_width + 2 * banner.curve_indent - CBanner.MIN_LEFT - trim);
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58 }
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59 w = Math.max(0, w);
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60 }
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61 rightSize = computeChildSize(right, w, DWT.DEFAULT, flushCache);
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62 if (wHint !is DWT.DEFAULT) {
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63 width -= rightSize.x + banner.curve_width - 2 * banner.curve_indent;
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64 }
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65 }
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66 Point leftSize = new Point(0, 0);
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67 if (left !is null) {
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68 int trim = computeTrim(left);
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69 int w = wHint is DWT.DEFAULT ? DWT.DEFAULT : Math.max(0, width - trim);
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70 leftSize = computeChildSize(left, w, DWT.DEFAULT, flushCache);
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71 }
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72
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73 // Add up sizes
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74 width = leftSize.x + rightSize.x;
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75 height = bottomSize.y;
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76 if (bottom !is null && (left !is null || right !is null)) {
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77 height += CBanner.BORDER_STRIPE + 2;
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78 }
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79 if (left !is null) {
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80 if (right is null) {
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81 height += leftSize.y;
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82 }
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83 else {
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84 height += Math.max(leftSize.y, banner.rightMinHeight is DWT.DEFAULT ? rightSize.y : banner.rightMinHeight);
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85 }
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86 }
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87 else {
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88 height += rightSize.y;
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89 }
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90 if (showCurve) {
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91 width += banner.curve_width - 2 * banner.curve_indent;
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92 height += CBanner.BORDER_TOP + CBanner.BORDER_BOTTOM + 2 * CBanner.BORDER_STRIPE;
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93 }
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94
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95 if (wHint !is DWT.DEFAULT)
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96 width = wHint;
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97 if (hHint !is DWT.DEFAULT)
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98 height = hHint;
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99
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100 return new Point(width, height);
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101 }
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102
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103 Point computeChildSize (Control control, int wHint, int hHint, bool flushCache) {
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104 Object data = control.getLayoutData();
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105 if (data is null || !(cast(CLayoutData) data)) {
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106 data = new CLayoutData();
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107 control.setLayoutData(data);
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108 }
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109 return (cast(CLayoutData) data).computeSize(control, wHint, hHint, flushCache);
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110 }
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111
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112 int computeTrim (Control c) {
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113 if (cast(Scrollable) c) {
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114 Rectangle rect = (cast(Scrollable) c).computeTrim(0, 0, 0, 0);
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115 return rect.width;
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116 }
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117 return c.getBorderWidth() * 2;
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118 }
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119
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120 protected bool flushCache (Control control) {
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121 Object data = control.getLayoutData();
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122 if (data !is null && cast(CLayoutData) data)
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123 (cast(CLayoutData) data).flushCache();
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124 return true;
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125 }
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126
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127 protected void layout (Composite composite, bool flushCache) {
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128 CBanner banner = cast(CBanner) composite;
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129 Control left = banner.left;
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130 Control right = banner.right;
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131 Control bottom = banner.bottom;
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132
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133 Point size = banner.getSize();
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134 bool showCurve = left !is null && right !is null;
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135 int width = size.x - 2 * banner.getBorderWidth();
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136 int height = size.y - 2 * banner.getBorderWidth();
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137
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138 Point bottomSize = new Point(0, 0);
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139 if (bottom !is null) {
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140 int trim = computeTrim(bottom);
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141 int w = Math.max(0, width - trim);
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142 bottomSize = computeChildSize(bottom, w, DWT.DEFAULT, flushCache);
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143 height -= bottomSize.y + CBanner.BORDER_STRIPE + 2;
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144 }
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145 if (showCurve)
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146 height -= CBanner.BORDER_TOP + CBanner.BORDER_BOTTOM + 2 * CBanner.BORDER_STRIPE;
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147 height = Math.max(0, height);
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148 Point rightSize = new Point(0, 0);
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149 if (right !is null) {
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150 int trim = computeTrim(right);
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151 int w = DWT.DEFAULT;
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152 if (banner.rightWidth !is DWT.DEFAULT) {
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153 w = banner.rightWidth - trim;
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154 if (left !is null) {
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155 w = Math.min(w, width - banner.curve_width + 2 * banner.curve_indent - CBanner.MIN_LEFT - trim);
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156 }
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157 w = Math.max(0, w);
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158 }
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159 rightSize = computeChildSize(right, w, DWT.DEFAULT, flushCache);
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160 width = width - (rightSize.x - banner.curve_indent + banner.curve_width - banner.curve_indent);
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161 }
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162 Point leftSize = new Point(0, 0);
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163 if (left !is null) {
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164 int trim = computeTrim(left);
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165 int w = Math.max(0, width - trim);
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166 leftSize = computeChildSize(left, w, DWT.DEFAULT, flushCache);
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167 }
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168
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169 int x = 0;
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170 int y = 0;
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171 int oldStart = banner.curveStart;
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172 Rectangle leftRect = null;
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173 Rectangle rightRect = null;
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174 Rectangle bottomRect = null;
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175 if (bottom !is null) {
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176 bottomRect = new Rectangle(x, y + size.y - bottomSize.y, bottomSize.x, bottomSize.y);
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177 }
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178 if (showCurve)
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179 y += CBanner.BORDER_TOP + CBanner.BORDER_STRIPE;
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180 if (left !is null) {
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181 leftRect = new Rectangle(x, y, leftSize.x, leftSize.y);
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182 banner.curveStart = x + leftSize.x - banner.curve_indent;
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183 x += leftSize.x - banner.curve_indent + banner.curve_width - banner.curve_indent;
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184 }
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185 if (right !is null) {
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186 if (left !is null) {
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187 rightSize.y = Math.max(leftSize.y, banner.rightMinHeight is DWT.DEFAULT ? rightSize.y : banner.rightMinHeight);
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188 }
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189 rightRect = new Rectangle(x, y, rightSize.x, rightSize.y);
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190 }
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191 if (banner.curveStart < oldStart) {
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192 banner.redraw(banner.curveStart - CBanner.CURVE_TAIL, 0, oldStart + banner.curve_width - banner.curveStart + CBanner.CURVE_TAIL + 5,
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193 size.y, false);
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194 }
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195 if (banner.curveStart > oldStart) {
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196 banner.redraw(oldStart - CBanner.CURVE_TAIL, 0, banner.curveStart + banner.curve_width - oldStart + CBanner.CURVE_TAIL + 5, size.y, false);
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197 }
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198 /*
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199 * The paint events must be flushed in order to make the curve draw smoothly
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200 * while the user drags the divider.
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201 * On Windows, it is necessary to flush the paints before the children are
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202 * resized because otherwise the children (particularly toolbars) will flash.
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203 */
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204 banner.update();
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205 banner.curveRect = new Rectangle(banner.curveStart, 0, banner.curve_width, size.y);
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206 if (bottomRect !is null)
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207 bottom.setBounds(bottomRect);
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208 if (rightRect !is null)
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209 right.setBounds(rightRect);
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210 if (leftRect !is null)
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211 left.setBounds(leftRect);
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212 }
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213 }