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