annotate anagram/vaclgui/helpview.hpp @ 7:57b2cc9b87f7

Use memcpy instead of strncpy when we know the length anyway. Modern gcc seems to think it knows how to detect misuse of strncpy, but it's wrong (in fact: very, very wrong) and the path of least resistance is to not try to fight with it.
author David A. Holland
date Mon, 30 May 2022 23:47:52 -0400
parents 13d2b8934445
children
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1 /*
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2 * AnaGram, A System for Syntax Directed Programming
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3 * Copyright 1997-2002 Parsifal Software. All Rights Reserved.
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4 * See the file COPYING for license and usage terms.
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5 *
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6 * helpview.hpp
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7 */
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8
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9 #ifndef HELPVIEW_HPP
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10 #define HELPVIEW_HPP
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11
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12 #include <icanvas.hpp>
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13 #include <iclipbrd.hpp>
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14 #include <icmdevt.hpp>
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15 #include <icmdhdr.hpp>
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16 //#include <icoordsy.hpp>
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17 //#include <idrawcv.hpp>
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18 //#include <iexcbase.hpp>
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19 #include <ifont.hpp>
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20 //#include <igbundle.hpp>
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21 //#include <iglist.hpp>
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22 //#include <igrafctx.hpp>
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23 //#include <igstring.hpp>
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24 #include <ipainhdr.hpp>
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25 #include <ipainevt.hpp>
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26 #include <ikeyhdr.hpp>
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27 #include <ikeyevt.hpp>
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28 #include <imenuevt.hpp>
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29 #include <imenuhdr.hpp>
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30 #include <imoushdr.hpp>
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31 #include <imousevt.hpp>
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32 #include <ipopmenu.hpp>
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33 //#include <irefcnt.hpp>
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34 #include <iscroll.hpp>
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35 #include <iscrlevt.hpp>
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36 #include <iscrlhdr.hpp>
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37 //#include <isizeevt.hpp>
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38 //#include <isizehdr.hpp>
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39 //#include <ititle.hpp>
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40
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41 class AgString; // from agstring.h
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42 #include "agbaltree.h"
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43 #include "cint.h"
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44 #include "dict.h"
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45 #include "digset.hpp"
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46 #include "frame.hpp"
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47 #include "search.h"
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48
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49
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50 #if 0
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51 struct HelpId {
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52 int index;
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53 HelpId(int x) : index(x) {}
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54 HelpId() : index(0) {}
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55 int operator < (const HelpId id) const {
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56 int flag = stricmp(dict_str(help_dict, index),
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57 dict_str(help_dict, id.index));
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58 if (flag) {
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59 return flag < 0;
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60 }
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61 return strcmp(dict_str(help_dict, index),
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62 dict_str(help_dict, id.index)) < 0;
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63
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64 }
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65 operator int () { return index; }
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66 };
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67 #endif
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68
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69 class HelpWord : public DigSetter::Dig {
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70 public:
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71 enum Style { textStyle, linkStyle, usedStyle, titleStyle };
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72 HelpWord() {}
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73 HelpWord(char *, int, cint, Style index = textStyle);
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74 HelpWord(const HelpWord &);
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75
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76 //int link;
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77 AgString linktopic;
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78
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79 int indent : 1;
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80 int forceBreak : 1;
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81 int noBreak : 1;
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82 int linkTraversed: 1;
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83 int highlight : 1;
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84 int bullet : 1;
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85 void moveTo(cint where_) { where = where_; }
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86 IRectangle rect(DigSetter::Style *style);
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87 int operator < (const HelpWord &x) const { return this < &x; }
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88 };
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89
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90
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91
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92 class DrawingArea
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93 : public IStaticText
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94 , public ICommandHandler
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95 , public IMenuHandler
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96 , public IMouseHandler
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97 , public IPaintHandler
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98 , public AgHelpHandler
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99 {
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100 public:
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101 DrawingArea(IWindow *, AgString);
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102 ~DrawingArea();
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103 void reset();
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104
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105 ISize preferredSize;
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106 int nLines;
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107 int measure;
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108 int spaceRequired;
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109 IPopUpMenu popUpMenu;
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110
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111 DrawingArea &initPopUp();
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112 DrawingArea &remeasureText();
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113 AgFrame *frameWindow;
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114
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115 static AgBalancedTree<AgString> traversedLinks;
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116
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117 char *highlightText;
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118 int nHighlight;
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119 DrawingArea &refreshWords(char *p, int n);
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120 DrawingArea &copyTo(IClipboard &c);
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121
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122 enum ButtonState { buttonIdle, buttonDown, waitingForClick };
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123 ButtonState rightButtonState;
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124
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125 protected:
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126
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127 Boolean DrawingArea::paintWindow(IPaintEvent &event);
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128 Boolean command(ICommandEvent &event);
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129 ISize calcMinimumSize() const;
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130
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131 Boolean mouseClicked(IMouseClickEvent &event);
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132 Boolean mouseMoved(IMouseEvent &event);
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133 Boolean makePopUpMenu(IMenuEvent &event);
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134 Boolean showHelp(IEvent &event);
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135
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136 DrawingArea &measureText();
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137 AgString getHelpText(const char *topic);
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138 AgArray<AgString> findLinks(AgString msg);
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139 static AgArray<AgString> sortLinks(AgArray<AgString> links);
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140
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141 virtual IFont font() const {
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142 return FontSpec::help;
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143 }
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144
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145 int lineHeight() {
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146 IFont &font = FontSpec::help;
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147 return font.externalLeading() + font.maxSize().height();
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148 }
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149 int maxCharWidth() {
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150 IFont &font = FontSpec::help;
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151 return font.maxSize().width();
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152 }
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153 int avgCharWidth() {
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154 IFont &font = FontSpec::help;
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155 return font.avgCharWidth();
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156 }
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157 int maxDescender() {
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158 IFont &font = FontSpec::help;
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159 return font.maxDescender();
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160 }
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161
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162 DrawingArea &refreshLinks();
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163 void refreshAllLinks();
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164
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165 AgClassAction<DrawingArea> refreshAction;
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166
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167 public:
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168 AgString helpText;
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169 AgString topic;
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170 int myTextLength;
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171
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172 AgStack<HelpWord> word;
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173 int nWords;
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174 static DigSetter::Style displayStyle[4];
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175 DigSetter setter;
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176 int painting;
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177
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178 private:
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179 int fingerCursorSet;
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180 IPointerHandle fingerCursor;
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181
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182 IFont windowFont;
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183 int longestLine;
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184 int margin;
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185 int paraIndent;
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186 int paraLeading;
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187 int helpShowing;
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188
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189 AgArray<AgString> links;
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190 AgArray<AgString> sortedLinks;
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191 AgArray<int> linkedWords;
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192 //static AgDictionary<DrawingArea *> activeViews;
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193 static AgBalancedTree<DrawingArea *> activeViews;
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194
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195 int charWidth[256];
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196 };
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197
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198 class AgHelpView
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199 : public ICanvas
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200 , public IKeyboardHandler
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201 , public IResizeHandler
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202 , public IScrollHandler
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203 {
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204 public:
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205 static const int defaultWindowHeight;
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206
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207 // Constructor
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208 AgHelpView(IWindow *, AgString);
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209
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210 // Destructor
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211 ~AgHelpView();
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212
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213 ISize suggestSize();
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214
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215 AgHelpView &layout();
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216 AgHelpView &doLayout();
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217 AgHelpView &repositionWindow();
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218
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219 DrawingArea dataArea;
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220
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221 SearchProcess searchProcess;
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222
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223 virtual Boolean findNext(AgString);
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224 virtual Boolean findPrev(AgString);
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225 AgHelpView &positionWords(char *p, int n);
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226 AgHelpView &copyTo(IClipboard &c) {
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227 dataArea.copyTo(c);
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228 return *this;
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229 }
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230
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231 protected:
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232
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233 // Layout functions
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234
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235 int lineHeight() {
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236 IFont &font = FontSpec::help;
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237 return font.externalLeading() + font.maxSize().height();
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238 }
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239 int maxCharWidth() {
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240 IFont &font = FontSpec::help;
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241 return font.maxSize().width();
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242 }
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243 int avgCharWidth() {
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244 IFont &font = FontSpec::help;
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245 return font.avgCharWidth();
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246 }
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247 int maxDescender() {
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248 IFont &font = FontSpec::help;
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249 return font.maxDescender();
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250 }
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251
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252 Boolean windowResize(IResizeEvent &event);
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253 ISize calcMinimumSize() const;
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254
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255 // Handler functions
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256
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257
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258 // Keyboard handler
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259 Boolean virtualKeyPress(IKeyboardEvent &);
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260
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261 // Menu handler
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262
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263
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264 // Scroll handler
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265
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266 Boolean lineDown(IScrollEvent &);
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267 Boolean lineUp(IScrollEvent &);
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268 Boolean pageDown(IScrollEvent &);
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269 Boolean pageUp(IScrollEvent &);
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270 Boolean scrollBoxTrack(IScrollEvent &);
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271
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272 private:
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273
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274 public:
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275 // child windows
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276 IScrollBar verticalScrollBar;
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277
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278 // window parameters
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279 int windowId;
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280 //IWindow *ownerWindow;
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281 int highlightIndex;
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282
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283 //layout state
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284 Boolean vsbShowing;
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285 int layoutActive;
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286
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287 AgNotificationAction<AgHelpView> colorChange;
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288 void onColorChange() { refresh(); }
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289 AgNotificationAction<AgHelpView> fontChange;
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290 void onFontChange();
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291 };
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292
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293 class AgHelpWindow
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294 : public AgFrame
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295 {
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296 public:
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297 AgHelpWindow(AgString);
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298 ~AgHelpWindow();
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299
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300 // otherwise the compiler complains this is hidden
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301 virtual int showHelp(IEvent &e) { return AgFrame::showHelp(e); }
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302
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303 static Boolean AgHelpWindow::showHelp(AgString topic);
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304 static Boolean AgHelpWindow::showHelpCentered(AgString topic);
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305
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306 //private:
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307 AgString copyTitleText;
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308
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309 // Child Windows
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310 AgHelpView helpView;
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311
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312 public:
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313 AgHelpWindow &setFocus() {
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314 helpView.setFocus();
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315 return *this;
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316 }
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317 virtual Boolean findNext(AgString s) {
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318 return helpView.findNext(s);
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319 }
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320 virtual Boolean findPrev(AgString s) {
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321 return helpView.findPrev(s);
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322 }
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323 AgHelpWindow &copyTo(IClipboard &c) {
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324 helpView.copyTo(c);
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325 return *this;
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326 }
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327 AgString copyTitle() { return copyTitleText.pointer(); };
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328 };
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329
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330
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331 #endif /* HELPVIEW_HPP */