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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 the real |
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17 * number are held. Addition of a numerical character sequence |
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18 * 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 #ifndef CALCEDITLINE_H |
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24 #define CALCEDITLINE_H |
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25 |
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26 |
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27 // INCLUDES |
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28 #include <e32std.h> |
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29 |
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30 |
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31 // Define maximum charactor number per line |
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32 const TInt KCalcMaxDigits(8); |
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33 const TInt KCalcMaxNumberWidth(11); |
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34 const TInt KCalcMaxEditNumberWidth( 10 ); |
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35 |
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36 // CLASS DEFINITIONS |
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37 |
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38 /** |
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39 TCalcEditLine is Calculation data class. |
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40 A line data for 'Editor Sub-Pane' |
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41 */ |
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42 class TCalcEditLine |
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43 { |
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44 public: |
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45 enum TCalcOperatorType |
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46 { |
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47 ECalcAdd, |
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48 ECalcSubtract, |
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49 ECalcMultiply, |
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50 ECalcDivide, |
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51 ECalcEqual, |
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52 ECalcSqrt, |
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53 ECalcPercent, |
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54 ECalcOperatorNone |
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55 }; |
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56 |
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57 public: // Constructors and destructor |
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58 /** |
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59 * C++ default constructor. |
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60 */ |
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61 TCalcEditLine(); |
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62 |
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63 /** |
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64 * Destructor. |
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65 */ |
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66 virtual ~TCalcEditLine(); |
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67 |
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68 /** |
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69 * Copy constructor. |
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70 */ |
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71 TCalcEditLine(const TCalcEditLine& aEditLine); |
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72 |
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73 /** |
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74 * Assignment operator |
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75 */ |
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76 const TCalcEditLine& operator=(const TCalcEditLine& aEditLine); |
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77 |
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78 public: // New functions |
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79 /** |
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80 * Return string of number |
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81 * @return String of number. |
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82 */ |
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83 inline const TPtrC NumberString() const; |
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84 |
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85 /** |
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86 * Clear a line |
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87 */ |
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88 void AllClear(); |
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89 |
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90 /** |
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91 * Delete last 1 digit from a line |
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92 */ |
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93 void ClearL(); |
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94 |
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95 /** |
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96 * Clear number from a line |
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97 */ |
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98 void ClearOperand(); |
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99 |
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100 /** |
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101 * Return number of a line |
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102 * @return TReal64 : Operand of a line |
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103 */ |
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104 TReal64 NumberL() const; |
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105 |
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106 /** |
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107 * Parameter aNumber is set to a line |
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108 * @param aNumber |
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109 */ |
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110 void SetNumber(TReal64 aNumber); |
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111 |
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112 /** |
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113 * Append a charactor to number. |
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114 * Leave may occur, KCalcErrEditorSpaceFull. |
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115 * @param aInput : A input which is Appended |
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116 */ |
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117 void AppendL(TChar aInput); |
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118 |
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119 /** |
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120 * Append any character to number before it is |
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121 * displayed inthe output sheet. |
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122 * Leave may occur, KCalcErrEditorSpaceFull. |
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123 * @param aInput : A char which is Appended |
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124 */ |
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125 void AppendNumberStringL(TChar aChar); |
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126 |
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127 /** |
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128 * Change sign of number |
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129 */ |
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130 void ChangeSignL(); |
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131 |
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132 /** |
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133 * If number of editor is "iii.ddd000...", set number "iii.ddd". |
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134 * Example: |
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135 * Number of editor is "12", number editor is set "12". |
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136 * Number of editor is "12." or "12.000...", number editor is set "12". |
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137 * Number of editor is "12.27", number editor is set "12.27". |
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138 * Number of editor is "12.27000...", number editor is set "12.27". |
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139 * @param aLine : current editor |
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140 */ |
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141 void TrimZeroL(); |
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142 |
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143 /** |
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144 * Return operator type of a line. |
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145 * @return TCalcOperatorType : ECalcAdd || ECalcSubtract || |
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146 ECalcMultiply || ECalcDivide || |
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147 ECalcEqual || ECalcOperatorNone |
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148 */ |
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149 inline TCalcOperatorType Operator() const; |
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150 |
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151 |
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152 /** |
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153 * Set operator to a line |
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154 * @param aType : operator enum |
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155 */ |
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156 inline void SetOperator(const TCalcOperatorType& aType); |
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157 |
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158 /** |
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159 * Check whether buffer of editline is "0" or not. |
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160 * @return ETrue :buffer of editline is "0". |
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161 * EFalse:buffer of editline is not "0". |
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162 * (Ex) If buffer is "0", return ETrue. |
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163 * If buffer is "0.0" or "2", return EFalse. |
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164 */ |
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165 TBool CheckZeroL() const; |
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166 |
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167 /** |
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168 * Changing decimal separator. |
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169 * @param aOld : Old decimal separator |
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170 * @param aNew : New decimal separator |
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171 */ |
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172 void ChangeDecimal(TChar aOld, TChar aNew); |
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173 |
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174 |
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175 private: // New functions |
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176 /** |
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177 * Return count of digits. |
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178 * @param aNumber : String of number |
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179 * @return Count of digits. |
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180 * E.g argument aNumber is "-226.89", return value is 5. |
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181 */ |
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182 TInt NumberDigits() const; |
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183 |
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184 private: // Data |
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185 TBuf<KCalcMaxNumberWidth> iNumber; // Operand of a line |
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186 TCalcOperatorType iOperator; // Operator of a line |
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187 }; |
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188 |
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189 #include "CalcEditLine.inl" |
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190 |
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191 #endif // __CALCEDITLINE_H__ |
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192 |
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193 // End of File |