1 /* |
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2 * Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0"" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Helper class used by CalcDocument,CCalcContainer etc., |
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15 * TCalcEditLine. |
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16 * The numerical value and the character sequence of |
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17 * the real number are held. Addition of a numerical character |
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18 * sequence and which clear operation are performed. |
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19 * |
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20 */ |
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21 |
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22 |
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23 |
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24 // INCLUDE FILES |
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25 #include "CalcDoc.h" |
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26 #include "CalcEditline.h" |
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27 #include "CalcEnv.h" |
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28 |
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29 |
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30 // LOCAL CONSTANTS AND MACROS |
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31 |
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32 |
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33 // ================= MEMBER FUNCTIONS ======================= |
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34 |
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35 |
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36 // C++ default constructor can NOT contain any code, that |
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37 // might leave. |
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38 // |
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39 TCalcEditLine::TCalcEditLine(): |
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40 iNumber(0), |
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41 iOperator(ECalcOperatorNone) |
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42 { |
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43 } |
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44 |
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45 TCalcEditLine::~TCalcEditLine() |
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46 { |
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47 } |
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48 |
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49 // Copy constructor |
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50 TCalcEditLine::TCalcEditLine |
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51 (const TCalcEditLine& aEditLine) |
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52 { |
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53 *this = aEditLine; |
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54 } |
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55 |
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56 // Assignment operator |
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57 const TCalcEditLine& TCalcEditLine::operator= |
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58 (const TCalcEditLine& aEditLine) |
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59 { |
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60 iNumber = aEditLine.iNumber; |
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61 iOperator = aEditLine.iOperator; |
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62 return *this; |
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63 } |
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64 |
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65 |
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66 // --------------------------------------------------------- |
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67 // TCalcEditLine::AllClear |
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68 // This function exists because long-press clear-key event is executed. |
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69 // (other items were commented in a header). |
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70 // --------------------------------------------------------- |
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71 // |
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72 void TCalcEditLine::AllClear() |
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73 { |
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74 iNumber.Zero(); |
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75 iOperator = ECalcOperatorNone; |
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76 } |
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77 |
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78 // --------------------------------------------------------- |
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79 // TCalcEditLine::ClearL |
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80 // This function exists because short-press clear-key event is executed. |
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81 // (other items were commented in a header). |
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82 // --------------------------------------------------------- |
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83 // |
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84 void TCalcEditLine::ClearL() |
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85 { |
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86 TInt length(iNumber.Length()); |
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87 if (length > 1) |
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88 { |
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89 CCalcAppEnv* env = CCalcAppEnv::Static(); |
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90 TChar minusIndicator(env->MinusIndicator()); |
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91 if (iNumber[0] == (TUint) minusIndicator && // Casted for THUMB build |
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92 length == 2) |
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93 { |
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94 SetNumber(0); |
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95 } |
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96 else |
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97 { |
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98 iNumber.Delete(length - 1, 1); |
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99 length--; |
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100 if (length == 2 && iNumber[0] == (TUint) minusIndicator && |
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101 // Casted for THUMB build |
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102 NumberL() == 0.0) |
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103 { |
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104 SetNumber(0); |
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105 } |
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106 } |
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107 } |
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108 else |
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109 { |
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110 SetNumber(0); |
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111 } |
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112 } |
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113 |
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114 |
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115 // --------------------------------------------------------- |
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116 // TCalcEditLine::ClearOperand |
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117 // Set number of editor "0". |
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118 // (other items were commented in a header). |
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119 // --------------------------------------------------------- |
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120 // |
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121 void TCalcEditLine::ClearOperand() |
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122 { |
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123 SetNumber(0); |
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124 } |
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125 |
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126 // --------------------------------------------------------- |
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127 // TCalcEditLine::NumberL |
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128 // Convert from TBuf<> to number. |
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129 // (other items were commented in a header). |
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130 // --------------------------------------------------------- |
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131 // |
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132 TReal64 TCalcEditLine::NumberL() const |
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133 { |
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134 TLex lex(iNumber); |
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135 TReal64 data; |
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136 TInt errorCode(lex.Val(data)); |
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137 // Converting is failed. |
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138 if (errorCode) |
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139 { |
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140 User::Leave(errorCode); |
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141 } |
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142 return data; |
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143 } |
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144 |
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145 // --------------------------------------------------------- |
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146 // TCalcEditLine::SetNumber |
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147 // Convert from number to TBuf<>. |
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148 // (other items were commented in a header). |
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149 // --------------------------------------------------------- |
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150 // |
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151 void TCalcEditLine::SetNumber |
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152 (TReal64 aNumber) |
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153 { |
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154 // Set data format. |
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155 TRealFormat realFormat( KCalcMaxEditNumberWidth, KCalcMaxDigits ); |
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156 if ( aNumber >= 0 ) |
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157 { |
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158 realFormat.iWidth--; |
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159 } |
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160 realFormat.iType = KRealFormatNoExponent; |
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161 realFormat.iTriLen = 0; // Delimit character is nothing |
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162 CCalcAppEnv* env = CCalcAppEnv::Static(); |
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163 TChar separator(env->DecimalSeparator()); |
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164 realFormat.iPoint = separator; |
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165 |
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166 TInt code = iNumber.Num(aNumber, realFormat); |
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167 |
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168 if(KErrOverflow == code || KErrUnderflow == code) |
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169 { |
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170 // Set data format |
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171 TRealFormat realFormat(KCalcMaxNumberWidth); |
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172 if ( aNumber >= 0 ) |
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173 { |
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174 realFormat.iWidth--; |
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175 } |
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176 realFormat.iType = KRealFormatExponent; |
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177 realFormat.iPlaces = 3; |
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178 realFormat.iTriLen = 0; // Delimit character is nothing |
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179 CCalcAppEnv* env = CCalcAppEnv::Static(); |
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180 TChar separator(env->DecimalSeparator()); |
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181 realFormat.iPoint = separator; |
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182 code = iNumber.Num(aNumber, realFormat); |
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183 } |
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184 |
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185 switch (code) |
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186 { |
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187 case KErrOverflow: |
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188 { |
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189 TRAP_IGNORE( User::Leave( KErrOverflow ) ); |
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190 break; |
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191 } |
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192 case KErrUnderflow: |
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193 { |
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194 iNumber.Num(0,0); |
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195 break; |
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196 } |
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197 default: |
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198 { |
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199 break; |
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200 } |
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201 } |
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202 } |
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203 |
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204 // --------------------------------------------------------- |
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205 // TCalcEditLine::AppendL |
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206 // This function exists to handle numeric or "#" key event. |
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207 // (other items were commented in a header). |
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208 // --------------------------------------------------------- |
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209 // |
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210 void TCalcEditLine::AppendL |
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211 (TChar aInput) // Input type is digit or decimal point only |
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212 { |
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213 // Check whether editline is not full |
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214 if ( iNumber.Length() < KCalcMaxNumberWidth ) |
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215 { |
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216 if ( aInput.IsDigit() ) |
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217 { |
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218 if ( NumberDigits() < KCalcMaxDigits ) |
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219 { |
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220 if (CheckZeroL()) |
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221 { |
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222 iNumber.Zero(); |
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223 } |
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224 iNumber.Append(aInput); |
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225 } |
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226 else |
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227 { |
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228 // If editor space is full, error code returned. |
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229 User::Leave(KCalcErrEditorSpaceFull); |
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230 } |
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231 } |
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232 // If decimal point do not exist, decimal point is added |
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233 // But editor has 8 dights, decimal point is not added. |
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234 else |
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235 { |
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236 CCalcAppEnv* env = CCalcAppEnv::Static(); |
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237 TChar separator(env->DecimalSeparator()); |
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238 if ( iNumber.Length() ) |
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239 { |
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240 if ( iNumber.Locate(separator) == KErrNotFound ) |
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241 { |
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242 if (NumberDigits() < KCalcMaxDigits) |
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243 { |
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244 iNumber.Append(separator); |
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245 } |
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246 } |
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247 } |
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248 else |
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249 { |
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250 SetNumber(0); |
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251 iNumber.Append(separator); |
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252 } |
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253 } |
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254 } |
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255 } |
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256 |
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257 // --------------------------------------------------------- |
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258 // TCalcEditLine::AppendNumberString |
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259 // This function appends a character after the number. |
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260 // Used for example in percent calculations. |
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261 // (other items were commented in a header). |
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262 // --------------------------------------------------------- |
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263 // |
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264 void TCalcEditLine::AppendNumberStringL |
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265 (TChar aChar) |
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266 { |
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267 // This kind of a paranoid check as when this function |
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268 // is called the amount of digits can never be more |
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269 // than 8. Because the iNumber is going |
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270 // to the output sheet we can display 10 characters |
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271 // 8 digits + operator + aChar |
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272 if ( NumberDigits() < KCalcMaxDigits + 1 ) |
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273 { |
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274 iNumber.Append(aChar); |
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275 } |
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276 else |
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277 { |
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278 // If editor space is full, error code returned. |
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279 User::Leave(KCalcErrEditorSpaceFull); |
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280 } |
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281 } |
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282 |
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283 // --------------------------------------------------------- |
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284 // TCalcEditLine::ChangeSignL |
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285 // This function exists to handle "Change Sign" command |
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286 // (other items were commented in a header). |
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287 // --------------------------------------------------------- |
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288 // |
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289 void TCalcEditLine::ChangeSignL() |
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290 { |
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291 TInt length(iNumber.Length()); |
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292 |
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293 // If the number is zero or empty, this command is ignored |
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294 if ((length > 0) && (NumberL() != 0.0)) |
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295 { |
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296 CCalcAppEnv* env = CCalcAppEnv::Static(); |
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297 TChar minusIndicator(env->MinusIndicator()); |
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298 // If the number is less than zero, '-' is deleted. |
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299 if ( iNumber[0] == (TUint) minusIndicator ) // Casted for THUMB build |
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300 { |
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301 iNumber.Delete(0, 1); |
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302 } |
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303 // Case number is more than zero. |
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304 else |
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305 { |
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306 TBuf<1> buf; |
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307 buf.Append(minusIndicator); |
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308 iNumber.Insert(0, buf); |
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309 } |
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310 } |
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311 } |
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312 |
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313 // --------------------------------------------------------- |
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314 // TCalcEditLine::TrimZeroL |
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315 // If number of editor is "iii.ddd000...", set number "iii.ddd". |
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316 // (other items were commented in a header). |
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317 // --------------------------------------------------------- |
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318 // |
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319 void TCalcEditLine::TrimZeroL() |
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320 { |
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321 TReal64 realValue(NumberL()); |
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322 SetNumber(realValue); |
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323 } |
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324 |
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325 |
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326 // --------------------------------------------------------- |
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327 // TCalcEditLine::CheckZero |
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328 // For checking that editline is cleared. |
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329 // (other items were commented in a header). |
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330 // --------------------------------------------------------- |
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331 // |
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332 TBool TCalcEditLine::CheckZeroL() const |
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333 { |
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334 return ((iNumber.Length() == 1) && (NumberL() == 0.0)); |
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335 } |
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336 |
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337 // --------------------------------------------------------- |
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338 // TCalcEditLine::ChangeDecimal |
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339 // Changing decimal separator. |
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340 // (other items were commented in a header). |
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341 // --------------------------------------------------------- |
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342 // |
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343 void TCalcEditLine::ChangeDecimal(TChar aOld, TChar aNew) |
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344 { |
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345 TInt pos(iNumber.Locate(aOld)); |
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346 |
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347 if (pos != KErrNotFound) |
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348 { |
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349 iNumber[pos] = (TUint16) aNew; |
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350 } |
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351 } |
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352 |
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353 |
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354 // --------------------------------------------------------- |
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355 // TCalcEditLine::NumberDigits |
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356 // To count of digits in a line |
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357 // (other items were commented in a header). |
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358 // --------------------------------------------------------- |
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359 // |
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360 TInt TCalcEditLine::NumberDigits() const |
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361 { |
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362 TInt len(iNumber.Length()); |
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363 TInt num(0); |
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364 for (TInt i(0); i < len; ++i) |
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365 { |
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366 TChar onechar(iNumber[i]); |
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367 if (onechar.IsDigit()) |
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368 { |
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369 ++num; |
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370 } |
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371 } |
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372 return num; |
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373 } |
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374 |
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375 |
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376 // End of File |
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