1 /* |
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2 * Copyright (c) 2007-2008 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: Implementation of Data window |
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15 * |
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16 */ |
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17 |
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18 |
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19 //Includes |
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20 #include "muldatawindow.h" |
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21 |
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22 #include <stdexcept> |
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23 #include <e32debug.h> |
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24 |
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25 //Internal includes |
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26 #include "mulassert.h" |
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27 #include "mulmodelimpl.h" |
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28 #include "mullog.h" |
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29 |
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30 using namespace std; |
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31 |
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32 namespace Alf |
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33 { |
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34 |
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35 // --------------------------------------------------------------------------- |
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36 // MulDataWindow |
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37 // --------------------------------------------------------------------------- |
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38 // |
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39 MulDataWindow::MulDataWindow( MulModelImpl& aMulModel ) |
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40 :mMulModel( aMulModel ), |
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41 mHighlight(KNotInitialized), |
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42 mItemIndex(KNotInitialized), |
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43 mOldItemIndex(KNotInitialized), |
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44 mBufferSize(KNotInitialized), |
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45 mWindowSize(KNotInitialized), |
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46 mWindowOffset(KNotInitialized), |
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47 mWindowTop(0), |
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48 mWindowBottom(0), |
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49 mBufferTop(0), |
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50 mBufferBottom(0), |
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51 mOldBufferTop(KNotInitialized), |
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52 mOldBufferBottom(KNotInitialized), |
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53 mRearBufferTop(0), |
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54 mRearBufferBottom(0), |
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55 mOldRearBufferTop(KNotInitialized), |
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56 mOldRearBufferBottom(KNotInitialized) |
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57 { |
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58 } |
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59 |
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60 // --------------------------------------------------------------------------- |
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61 // SetWindowSize |
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62 // --------------------------------------------------------------------------- |
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63 // |
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64 void MulDataWindow::SetWindowSize( int aWindowSize ) |
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65 { |
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66 MUL_LOG_ENTRY_EXIT("MUL::MulDataWindow::SetWindowSize()"); |
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67 |
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68 __MUL_ASSERT( aWindowSize > 0, KLInvalidArgument ); |
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69 |
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70 if( mWindowSize != aWindowSize ) |
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71 { |
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72 if( KNotInitialized == mBufferSize ) |
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73 { |
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74 mBufferSize = aWindowSize; |
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75 } |
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76 |
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77 mWindowSize = aWindowSize; |
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78 //devide window half |
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79 //Try to keep this much item above highlight and below highlight |
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80 mWindowOffset = mWindowSize / 2; |
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81 |
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82 //adjusting window offset |
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83 //if window size changes then the top and bottom offset should be |
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84 // adjusted such that highlight remains at the centre |
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85 //window top and bottom are inclusive |
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86 |
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87 mWindowTop = mItemIndex - mWindowOffset; |
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88 mWindowTop = mWindowTop < 0 ? 0 : mWindowTop ; |
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89 mWindowBottom = mWindowTop + mWindowSize - 1; |
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90 mWindowBottom = mWindowBottom >= mMulModel.CurrentItemCount() ? (mMulModel.CurrentItemCount() -1) : mWindowBottom; |
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91 |
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92 MUL_LOG_INFO2("MUL::MulDataWindow::SetWindowSize() mWindowTop:%d,mWindowBottom:%d",mWindowTop,mWindowBottom); |
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93 |
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94 AdjustBuffer(); |
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95 mMulModel.DataWindowUpdated(); |
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96 } |
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97 //else nothing needed |
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98 } |
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99 |
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100 // --------------------------------------------------------------------------- |
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101 // SetBufferSize |
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102 // --------------------------------------------------------------------------- |
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103 // |
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104 void MulDataWindow::SetBufferSize( int aBufferSize ) |
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105 { |
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106 MUL_LOG_ENTRY_EXIT("MUL::MulDataWindow::SetBufferSize()"); |
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107 |
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108 __MUL_ASSERT( aBufferSize > 0, KLInvalidArgument ); |
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109 |
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110 if( mBufferSize != aBufferSize ) |
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111 { |
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112 mBufferSize = aBufferSize; |
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113 |
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114 if(mMulModel.CurrentItemCount() > 0) |
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115 { |
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116 AdjustBuffer(); |
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117 mMulModel.DataWindowUpdated(); |
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118 } |
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119 } |
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120 //else nothing needed |
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121 } |
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122 |
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123 // --------------------------------------------------------------------------- |
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124 // ~MulDataWindow |
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125 // --------------------------------------------------------------------------- |
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126 // |
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127 MulDataWindow::~MulDataWindow() |
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128 { |
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129 // do nothing |
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130 } |
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131 |
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132 // --------------------------------------------------------------------------- |
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133 // SetHighlight |
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134 // --------------------------------------------------------------------------- |
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135 // |
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136 void MulDataWindow::SetHighlight( int aHighlightIndex ) |
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137 { |
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138 MUL_LOG_INFO2("MUL::MulDataWindow::SetHighlight() mHighlight:%d,modelCount:%d",aHighlightIndex,mMulModel.CurrentItemCount()); |
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139 |
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140 __MUL_ASSERT( aHighlightIndex >= 0 && aHighlightIndex <= mMulModel.CurrentItemCount()-1, KLInvalidArgument ); |
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141 |
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142 if( mHighlight != aHighlightIndex ) |
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143 { |
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144 mHighlight = aHighlightIndex; |
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145 |
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146 ScrollWindow( mHighlight ); |
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147 } |
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148 //else same highlight |
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149 } |
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150 |
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151 |
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152 // --------------------------------------------------------------------------- |
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153 // UpdateHighlight |
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154 // --------------------------------------------------------------------------- |
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155 // |
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156 void MulDataWindow::UpdateHighlight( int aHighlightIndex ) |
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157 { |
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158 // No need to assert. We should send highlight -1 when all the items are removed. |
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159 // Widget should handle. to show emty text visualization |
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160 mHighlight = aHighlightIndex; |
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161 } |
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162 |
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163 // --------------------------------------------------------------------------- |
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164 // ScrollWindow |
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165 // --------------------------------------------------------------------------- |
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166 // |
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167 void MulDataWindow::ScrollWindow( int aItemIndex ) |
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168 { |
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169 MUL_LOG_INFO2("MUL::MulDataWindow::ScrollWindow() aItemIndex:%d,modelCount:%d",aItemIndex,mMulModel.CurrentItemCount()); |
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170 |
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171 __MUL_ASSERT( aItemIndex >= 0 && aItemIndex <= mMulModel.CurrentItemCount()-1, KLInvalidArgument ); |
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172 |
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173 if( mItemIndex != aItemIndex ) |
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174 { |
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175 mOldItemIndex = mItemIndex; |
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176 mItemIndex = aItemIndex; |
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177 |
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178 if(IsWindowEnabled()) |
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179 { |
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180 UpdateDataWindow(); |
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181 } |
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182 } |
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183 //else same highlight |
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184 } |
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185 |
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186 |
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187 // --------------------------------------------------------------------------- |
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188 // UpdateDataWindow |
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189 // --------------------------------------------------------------------------- |
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190 // |
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191 void MulDataWindow::UpdateDataWindow() |
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192 { |
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193 #ifdef _DEBUG |
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194 int diff = mItemIndex - mOldItemIndex; |
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195 #endif //_DEBUG |
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196 |
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197 //If diffrence is negative than highlight is moved up else down |
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198 (( mItemIndex - mOldItemIndex ) < 0 ) ? ShiftWindowUp() : ShiftWindowDown() ; |
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199 } |
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200 |
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201 // --------------------------------------------------------------------------- |
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202 // ShiftWindowDown |
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203 // --------------------------------------------------------------------------- |
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204 // |
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205 void MulDataWindow::ShiftWindowDown() |
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206 { |
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207 MUL_LOG_ENTRY_EXIT("MUL::MulDataWindow::ShiftWindowDown()"); |
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208 MUL_LOG_INFO2("MUL::MulDataWindow::ShiftWindowDown() mItemIndex:%d,mWindowBottom:%d",mItemIndex,mWindowBottom); |
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209 |
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210 if( mItemIndex > mWindowBottom ) |
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211 { |
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212 mWindowTop = mItemIndex - mWindowOffset; |
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213 mWindowBottom = mWindowTop + mWindowSize -1; |
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214 //bottom is exceeding model count |
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215 mWindowBottom = mWindowBottom >= mMulModel.CurrentItemCount() ? |
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216 mWindowBottom = mMulModel.CurrentItemCount() - 1 : mWindowBottom; |
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217 |
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218 mWindowTop = mWindowBottom - mWindowSize + 1; |
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219 //top can't be negative |
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220 mWindowTop = mWindowTop < 0 ? 0 : mWindowTop ; |
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221 |
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222 MUL_LOG_INFO2("MUL::MulDataWindow::ShiftWindowDown() mWindowTop:%d,mWindowBottom:%d",mWindowTop,mWindowBottom); |
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223 SaveOldValues(); |
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224 AdjustBuffer(); |
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225 mMulModel.DataWindowUpdated(); |
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226 } |
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227 //else nothing needed |
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228 } |
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229 |
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230 // --------------------------------------------------------------------------- |
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231 // ShiftWindowUp |
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232 // --------------------------------------------------------------------------- |
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233 // |
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234 void MulDataWindow::ShiftWindowUp() |
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235 { |
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236 MUL_LOG_ENTRY_EXIT("MUL::MulDataWindow::ShiftWindowUp() Start"); |
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237 MUL_LOG_INFO2("MUL::MulDataWindow::ShiftWindowUp() mItemIndex:%d,mWindowBottom:%d",mItemIndex,mWindowBottom); |
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238 |
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239 if( mItemIndex < mWindowTop ) |
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240 { |
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241 mWindowTop = mItemIndex - mWindowOffset; |
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242 //top can't be negative |
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243 mWindowTop = mWindowTop < 0 ? 0 : mWindowTop ; |
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244 |
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245 mWindowBottom = mWindowTop + mWindowSize -1; |
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246 |
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247 //bottom cant exceed model count |
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248 mWindowBottom = mWindowBottom >= mMulModel.CurrentItemCount() ? |
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249 mWindowBottom = mMulModel.CurrentItemCount() - 1 : mWindowBottom; |
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250 |
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251 MUL_LOG_INFO2("MUL::MulDataWindow::ShiftWindowUp() mWindowTop:%d,mWindowBottom:%d",mWindowTop,mWindowBottom); |
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252 |
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253 SaveOldValues(); |
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254 AdjustBuffer(); |
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255 mMulModel.DataWindowUpdated(); |
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256 } |
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257 //else nothing needed |
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258 } |
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259 |
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260 // --------------------------------------------------------------------------- |
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261 // AdjustBuffer |
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262 // --------------------------------------------------------------------------- |
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263 // |
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264 void MulDataWindow::AdjustBuffer() |
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265 { |
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266 MUL_LOG_ENTRY_EXIT("MUL::MulDataWindow::AdjustBuffer()"); |
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267 |
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268 int modelCount = mMulModel.CurrentItemCount() -1; |
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269 |
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270 //remove data is new window is smaller/add is new window is bigger |
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271 if( mWindowTop == 0 && ActualBufferSize() <= modelCount ) |
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272 { |
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273 MUL_LOG_INFO("MUL::MulDataWindow::AdjustBuffer() mWindowTop == 0 "); |
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274 |
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275 mBufferTop = mWindowTop; |
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276 mBufferBottom = mBufferTop + mWindowSize + mBufferSize - 1; |
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277 |
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278 //Create rear top and rear bottom only in looping case |
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279 //window top is zero so data at other end should be buffered |
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280 mRearBufferBottom = modelCount; |
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281 mRearBufferTop = mRearBufferBottom - mBufferSize +1; |
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282 } |
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283 else if( mWindowBottom == modelCount && ActualBufferSize() <= modelCount ) |
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284 { |
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285 MUL_LOG_INFO("MUL::MulDataWindow::AdjustBuffer() mWindowBottom == modelCount "); |
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286 |
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287 mBufferBottom = mWindowBottom ; |
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288 mBufferTop = mBufferBottom - (mWindowSize + mBufferSize) + 1; |
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289 |
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290 //Create rear top and rear bottom only in looping case |
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291 //window bottom is equal to model count so data at other end should be buffered |
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292 mRearBufferTop = 0; |
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293 mRearBufferBottom = mRearBufferTop + mBufferSize -1; |
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294 } |
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295 else |
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296 { |
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297 MUL_LOG_INFO("MUL::MulDataWindow::AdjustBuffer() else "); |
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298 |
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299 mBufferTop = mWindowTop - mBufferSize; |
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300 mBufferBottom = mWindowBottom + mBufferSize; |
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301 |
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302 //check if top or bottom is out of bound and update offset accordingly |
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303 if( mBufferTop < 0 ) |
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304 { |
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305 MUL_LOG_INFO("MUL::MulDataWindow::AdjustBuffer() mBufferTop < 0 "); |
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306 |
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307 mBufferTop = 0; |
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308 mBufferBottom = mBufferTop + ActualBufferSize() - 1; |
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309 //buffer bottom cant be larger then model count |
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310 mBufferBottom = mBufferBottom > modelCount ? modelCount : mBufferBottom; |
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311 } |
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312 else if( mBufferBottom > modelCount ) |
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313 { |
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314 MUL_LOG_INFO("MUL::MulDataWindow::AdjustBuffer() mBufferBottom > modelCount"); |
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315 |
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316 mBufferBottom = modelCount ; |
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317 mBufferTop = mBufferBottom - ActualBufferSize() + 1; |
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318 //buffer top cant be less then 0 |
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319 mBufferTop = mBufferTop < 0 ? 0 : mBufferTop; |
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320 } |
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321 |
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322 //in other case rear top and rear bottom is not use set to -1 |
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323 mRearBufferTop = KNotInitialized; |
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324 mRearBufferBottom = KNotInitialized; |
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325 } |
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326 |
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327 MUL_LOG_INFO2("MUL::MulDataWindow::AdjustBuffer() mOldBufferTop:%d,mOldBufferBottom:%d",mOldBufferTop,mOldBufferBottom); |
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328 MUL_LOG_INFO2("MUL::MulDataWindow::AdjustBuffer() mOldRearBufferBottom:%d,mOldRearBufferTop:%d",mOldRearBufferBottom,mOldRearBufferTop); |
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329 |
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330 MUL_LOG_INFO2("MUL::MulDataWindow::AdjustBuffer() mBufferTop:%d,mBufferBottom:%d",mBufferTop,mBufferBottom); |
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331 MUL_LOG_INFO2("MUL::MulDataWindow::AdjustBuffer() mRearBufferBottom:%d,mRearBufferTop:%d",mRearBufferBottom,mRearBufferTop); |
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332 |
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333 __MUL_ASSERT_DEBUG( mWindowTop >= 0 && mWindowBottom < mMulModel.CurrentItemCount(), _L("Invlid Window")); |
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334 __MUL_ASSERT_DEBUG( mBufferTop >= 0 && mBufferBottom < mMulModel.CurrentItemCount(), _L("Invlid Buffer")); |
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335 } |
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336 |
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337 // --------------------------------------------------------------------------- |
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338 // IsItemInDataWindow |
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339 // --------------------------------------------------------------------------- |
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340 // |
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341 bool MulDataWindow::IsItemInDataWindow(int aItemIndex ) const |
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342 { |
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343 //__MUL_ASSERT_DEBUG( aItemIndex >= 0 && aItemIndex <= mMulModel.CurrentItemCount()-1, KLInvalidArgument ); |
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344 |
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345 bool result( false ); |
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346 |
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347 if(mWindowSize == KNotInitialized ) |
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348 { |
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349 result = false; |
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350 } |
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351 //check that rear buffer is on or not in looping case |
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352 else if( mRearBufferTop != KNotInitialized && mRearBufferBottom != KNotInitialized ) |
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353 { |
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354 if( ( aItemIndex >= mBufferTop && aItemIndex <= mBufferBottom ) || |
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355 ( aItemIndex >= mRearBufferTop && aItemIndex <= mRearBufferBottom ) ) |
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356 { |
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357 result = true; |
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358 } |
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359 } |
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360 else if( aItemIndex >= mBufferTop && aItemIndex <= mBufferBottom ) |
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361 { |
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362 result = true; |
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363 } |
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364 return result; |
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365 } |
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366 |
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367 |
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368 // --------------------------------------------------------------------------- |
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369 // RelativeIndex |
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370 // --------------------------------------------------------------------------- |
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371 // |
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372 int MulDataWindow::RelativeIndex( int aAbsoluteIndex ) const |
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373 { |
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374 __MUL_ASSERT_DEBUG( aAbsoluteIndex >= 0 && aAbsoluteIndex <= mMulModel.CurrentItemCount()-1, KLInvalidArgument ); |
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375 |
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376 if( !IsItemInDataWindow(aAbsoluteIndex) ) |
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377 { |
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378 return -1; |
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379 } |
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380 |
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381 if( mRearBufferTop != KNotInitialized && mRearBufferBottom != KNotInitialized ) |
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382 { |
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383 if( mRearBufferBottom == mMulModel.CurrentItemCount() - 1 ) |
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384 { |
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385 if( aAbsoluteIndex >= mRearBufferTop && aAbsoluteIndex <= mRearBufferBottom ) |
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386 { |
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387 int bufferSize = BottomOffset() - TopOffset() + 1; |
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388 int rearDiff = aAbsoluteIndex - mRearBufferTop; |
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389 int relativeIndex = bufferSize + rearDiff; |
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390 return relativeIndex; |
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391 } |
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392 else |
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393 { |
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394 int relativeIndex = aAbsoluteIndex < TopOffset() ? |
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395 aAbsoluteIndex : aAbsoluteIndex - TopOffset() ; |
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396 return relativeIndex; |
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397 } |
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398 } |
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399 else |
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400 { |
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401 if( aAbsoluteIndex >= mRearBufferTop && aAbsoluteIndex <= mRearBufferBottom ) |
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402 { |
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403 int relativeIndex = aAbsoluteIndex < TopOffset() ? |
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404 aAbsoluteIndex : aAbsoluteIndex - TopOffset() ; |
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405 return relativeIndex; |
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406 } |
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407 else |
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408 { |
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409 int bufferSize = mRearBufferBottom - mRearBufferTop + 1; |
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410 int diff = aAbsoluteIndex - TopOffset(); |
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411 int relativeIndex = bufferSize + diff; |
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412 return relativeIndex; |
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413 } |
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414 } |
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415 } |
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416 else |
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417 { |
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418 int relativeIndex = aAbsoluteIndex < TopOffset() ? |
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419 aAbsoluteIndex : aAbsoluteIndex - TopOffset() ; |
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420 return relativeIndex; |
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421 } |
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422 } |
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423 |
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424 // --------------------------------------------------------------------------- |
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425 // AbsoluteIndex |
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426 // --------------------------------------------------------------------------- |
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427 // |
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428 int MulDataWindow::AbsoluteIndex( int aRelativeIndex ) const |
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429 { |
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430 __MUL_ASSERT_DEBUG( aRelativeIndex >= 0 && aRelativeIndex <= ActualBufferSize(), _L("Invalid Relative Index")); |
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431 |
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432 if( mRearBufferTop != KNotInitialized && mRearBufferBottom != KNotInitialized ) |
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433 { |
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434 if( mRearBufferBottom == mMulModel.CurrentItemCount() - 1 ) |
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435 { |
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436 if( aRelativeIndex > BottomOffset() ) |
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437 { |
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438 //relative index is in loop buffer |
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439 int diff = aRelativeIndex - BottomOffset() - 1; |
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440 int absoluteIndex = RearTopOffset() + diff; |
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441 return absoluteIndex; |
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442 } |
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443 else |
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444 { |
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445 int absoluteIndex = TopOffset() + aRelativeIndex; |
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446 return absoluteIndex; |
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447 } |
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448 } |
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449 else |
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450 { |
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451 if( aRelativeIndex <= RearBottomOffset() ) |
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452 { |
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453 //relative index is in loop buffer |
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454 int absoluteIndex = RearTopOffset() + aRelativeIndex; |
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455 return absoluteIndex; |
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456 } |
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457 else |
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458 { |
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459 int diff = aRelativeIndex - RearBottomOffset() - 1; |
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460 int absoluteIndex = TopOffset() + diff; |
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461 return absoluteIndex; |
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462 } |
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463 } |
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464 } |
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465 else |
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466 { |
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467 int absoluteIndex = TopOffset() + aRelativeIndex; |
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468 return absoluteIndex; |
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469 } |
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470 } |
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471 |
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472 // --------------------------------------------------------------------------- |
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473 // SetVisibleWindow |
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474 // --------------------------------------------------------------------------- |
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475 // |
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476 void MulDataWindow::SetVisibleWindow(int aWindowTop, int aWindowBottom) |
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477 { |
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478 mWindowTop = aWindowTop; |
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479 mWindowBottom = aWindowBottom; |
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480 } |
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481 |
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482 // --------------------------------------------------------------------------- |
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483 // IsBufferOffsetChanged |
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484 // --------------------------------------------------------------------------- |
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485 // |
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486 bool MulDataWindow::IsBufferOffsetChanged() |
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487 { |
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488 if(mRearBufferBottom != mOldRearBufferBottom || mRearBufferTop != mOldRearBufferTop |
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489 || mBufferTop != mOldBufferTop || mBufferBottom != mOldBufferBottom) |
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490 { |
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491 return true; |
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492 } |
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493 return false; |
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494 } |
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495 |
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496 } // namespace Alf |
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497 |
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498 //End of file |
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