author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 15 Mar 2010 12:40:30 +0200 | |
branch | RCL_3 |
changeset 12 | ce1c7ad1f18b |
parent 0 | 4e91876724a2 |
child 13 | bcb43dc84c44 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Layout that performs crossfade |
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* |
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*/ |
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|
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// Include Files |
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#include "shwzoomandpanlayout.h" |
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#include <e32math.h> |
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#include <uiacceltk/HuiCurvePath.h> |
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#include <glxlog.h> |
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#include "shwconstants.h" |
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#include "shwgeometryutilities.h" |
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using namespace NShwSlideshow; |
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// ----------------------------------------------------------------------------- |
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// Constructor |
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// ----------------------------------------------------------------------------- |
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TShwZoomAndPanLayout::TShwZoomAndPanLayout() |
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: iScreenSize( 0, 0 ), |
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iImageSize( 0, 0 ), |
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iPanningCurve( NULL ) // T-class so need to set value |
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{ |
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__DEBUG_ONLY( _iName = _L("TShwZoomAndPanLayout") ); |
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// default values |
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// curve style is linear |
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iCurvePosition.SetStyle( EAlfTimedValueStyleLinear ); |
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// set zoom style to sine so it accelerates and decelerates |
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iZoomedSize.SetStyle( EAlfTimedValueStyleSineWave ); |
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} |
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// ----------------------------------------------------------------------------- |
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// Destructor |
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// ----------------------------------------------------------------------------- |
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TShwZoomAndPanLayout::~TShwZoomAndPanLayout() |
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{ |
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// Do nothing |
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} |
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// ----------------------------------------------------------------------------- |
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// SetSizes |
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// ----------------------------------------------------------------------------- |
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TReal32 TShwZoomAndPanLayout::SetSizes( |
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TSize aScreenSize, TSize aImageSize, TSize aMaximumSize ) |
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{ |
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GLX_LOG_INFO( "TShwZoomAndPanLayout::SetSizes" ); |
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// set the size from TSize (integer) to THuiRealSize (float) |
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iScreenSize.iWidth = aScreenSize.iWidth; |
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iScreenSize.iHeight = aScreenSize.iHeight; |
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iImageSize.iWidth = aImageSize.iWidth; |
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iImageSize.iHeight = aImageSize.iHeight; |
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// recalculate min and max size for zoom |
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CalculateMinAndMaxSize( aMaximumSize ); |
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// calculate zoom factor for iHeight, iWidth is same as aspect ratio is kept |
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// maximum per minimum |
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TReal32 zoomFactor = iMaximumSize.iHeight / iMinimumSize.iHeight; |
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// return zoom factor |
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return zoomFactor; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// SetPanningCurve |
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// ----------------------------------------------------------------------------- |
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void TShwZoomAndPanLayout::SetPanningCurve( CAlfCurvePath* aCurve ) |
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{ |
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iPanningCurve = aCurve; |
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} |
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// ----------------------------------------------------------------------------- |
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// MaximumSize |
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// ----------------------------------------------------------------------------- |
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TSize TShwZoomAndPanLayout::MaximumSize() |
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{ |
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return iMaximumSize; |
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} |
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// ----------------------------------------------------------------------------- |
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// ResetSizeToMinimum |
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// ----------------------------------------------------------------------------- |
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void TShwZoomAndPanLayout::ResetSizeToMinimum() |
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{ |
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GLX_LOG_INFO( "TShwZoomAndPanLayout::ResetSizeToMinimum" ); |
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} |
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// ----------------------------------------------------------------------------- |
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104 |
// StartZoom |
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105 |
// ----------------------------------------------------------------------------- |
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106 |
void TShwZoomAndPanLayout::StartZoom( |
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TZoomDirection aZoomDirection, TInt aDuration ) |
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108 |
{ |
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109 |
GLX_LOG_INFO1( |
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"TShwZoomAndPanLayout::StartZoom( %d )", aDuration ); |
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111 |
|
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112 |
// remember the zoom direction |
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iZoomDirection = aZoomDirection; |
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// remember also the zoom duration |
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iZoomDuration = aDuration; |
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116 |
|
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// calculate curve position |
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TInt curveLength = 0; |
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119 |
// set curvelength, if we have curve |
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120 |
if( iPanningCurve ) |
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121 |
{ |
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curveLength = iPanningCurve->Length(); |
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123 |
} |
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124 |
|
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125 |
// default case is to run the first half of the curve |
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126 |
TInt curveStart = 0; |
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TInt curveEnd = curveLength / 2; |
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128 |
|
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129 |
// change the zoom according to direction |
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if( EZoomOut == aZoomDirection ) |
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131 |
{ |
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132 |
GLX_LOG_INFO2( |
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133 |
"TShwZoomAndPanLayout:: Zooming out start(%.1f,%.1f)", |
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134 |
iMaximumSize.iWidth, iMaximumSize.iHeight ); |
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135 |
GLX_LOG_INFO2( |
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136 |
"TShwZoomAndPanLayout:: Zooming out target(%.1f,%.1f)", |
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137 |
iMinimumSize.iWidth, iMinimumSize.iHeight ); |
12
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138 |
|
0
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139 |
// run the latter half of the curve |
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140 |
curveStart = curveLength / 2; |
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141 |
curveEnd = curveLength; |
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142 |
} |
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143 |
else // default case is EZoomIn |
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144 |
{ |
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145 |
GLX_LOG_INFO2( |
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146 |
"TShwZoomAndPanLayout:: Zooming in start(%.1f,%.1f)", |
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147 |
iMinimumSize.iWidth, iMinimumSize.iHeight ); |
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148 |
GLX_LOG_INFO2( |
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149 |
"TShwZoomAndPanLayout:: Zooming in target(%.1f,%.1f)", |
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150 |
iMaximumSize.iWidth, iMaximumSize.iHeight ); |
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151 |
} |
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152 |
|
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153 |
// set position, if we have curve its either from start to half |
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154 |
// or half to end and if we dont then its always 0 |
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155 |
iCurvePosition.Set( curveStart ); |
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156 |
iCurvePosition.Set( curveEnd, aDuration ); |
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157 |
} |
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158 |
|
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159 |
// ----------------------------------------------------------------------------- |
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160 |
// Pause |
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161 |
// ----------------------------------------------------------------------------- |
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162 |
TInt TShwZoomAndPanLayout::InvertZoom() |
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163 |
{ |
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164 |
GLX_LOG_INFO( "TShwZoomAndPanLayout::InvertZoom" ); |
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165 |
if( EZoomOut == iZoomDirection ) |
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166 |
{ |
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167 |
StartZoom( EZoomIn, iZoomDuration ); |
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168 |
} |
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169 |
else |
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170 |
{ |
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171 |
StartZoom( EZoomOut, iZoomDuration ); |
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172 |
} |
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173 |
|
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174 |
return 0; |
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175 |
} |
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176 |
|
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177 |
// ----------------------------------------------------------------------------- |
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178 |
// Pause |
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179 |
// ----------------------------------------------------------------------------- |
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180 |
void TShwZoomAndPanLayout::Pause() |
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181 |
{ |
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182 |
GLX_LOG_INFO( "TShwZoomAndPanLayout::Pause" ); |
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183 |
// pause size |
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184 |
iZoomedSize.Pause(); |
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185 |
// pause curve position |
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186 |
iCurvePosition.Pause(); |
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187 |
} |
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188 |
|
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189 |
// ----------------------------------------------------------------------------- |
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190 |
// Resume |
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191 |
// ----------------------------------------------------------------------------- |
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192 |
void TShwZoomAndPanLayout::Resume() |
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193 |
{ |
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194 |
GLX_LOG_INFO( "TShwZoomAndPanLayout::Resume" ); |
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195 |
// resume size |
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196 |
iZoomedSize.Resume(); |
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197 |
// resume pan curve |
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198 |
iCurvePosition.Resume(); |
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199 |
} |
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200 |
|
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201 |
// ----------------------------------------------------------------------------- |
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202 |
// DoSetLayoutValues |
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203 |
// ----------------------------------------------------------------------------- |
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204 |
void TShwZoomAndPanLayout::DoSetLayoutValues( TGlxLayoutInfo& aInfo ) |
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205 |
{ |
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206 |
// calculate new x size, current value from zoomedsize |
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207 |
TReal32 x_size = iZoomedSize.iWidth.Now(); |
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208 |
// calculate new y size, current value from zoomedsize |
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TReal32 y_size = iZoomedSize.iHeight.Now(); |
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210 |
|
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// ensure x is inside maximum size and minimum size |
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x_size = Min( x_size, iMaximumSize.iWidth ); |
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x_size = Max( x_size, iMinimumSize.iWidth ); |
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214 |
|
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// ensure y is inside maximum size and minimum size |
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y_size = Min( y_size, iMaximumSize.iHeight ); |
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y_size = Max( y_size, iMinimumSize.iHeight ); |
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218 |
|
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// set position only if we have a panning curve, this enables the use of this |
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// layout as only a zooming layout and then some other layout can define |
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// the position (as we dont overwrite 0,0 there...) |
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if( iPanningCurve ) |
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223 |
{ |
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// need to ensure that position does not make image |
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// go outside the bounding box. We trust that the curve has |
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// been calculated so that in 100% zoom it stays inside the image |
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// so the only thing needed is to ensure zoom keeps the image inside |
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// the box as well. |
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// this is done by scaling the position with the current |
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// zoomfactor per maximum zoomfactor. The scalefactor is between |
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// 0 and 1; when size is minimum the scale is 0 and when size |
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// is maximum the scale is 1. |
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// If we are in minimum size, we cant do any panning and |
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// if we are in maximum size we can do the maximum pan. |
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// current zoomfactor is current height per the minimum height |
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// formula: |
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// current.y - minimum.y |
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// scale = --------------------- |
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// maximum.y - minimum.y |
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// and need to ensure maximum.y > minimum.y, otherwise scale becomes |
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// infinite |
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} |
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243 |
} |
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244 |
|
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// ----------------------------------------------------------------------------- |
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// DoChanged |
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// ----------------------------------------------------------------------------- |
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TBool TShwZoomAndPanLayout::DoChanged() const |
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249 |
{ |
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TBool ret = EFalse; |
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return iZoomedSize.Changed() || ret; |
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252 |
} |
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253 |
|
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// ----------------------------------------------------------------------------- |
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// DoClearChanged |
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// ----------------------------------------------------------------------------- |
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void TShwZoomAndPanLayout::DoClearChanged() |
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258 |
{ |
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iZoomedSize.ClearChanged(); |
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260 |
} |
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261 |
|
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// ----------------------------------------------------------------------------- |
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// CalculateMinAndMaxSize |
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// ----------------------------------------------------------------------------- |
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void TShwZoomAndPanLayout::CalculateMinAndMaxSize( TSize aMaximumSize ) |
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266 |
{ |
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// use the namespace for coord utilities |
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using namespace NShwGeometryUtilities; |
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269 |
|
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// set minimum size to be the image size |
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iMinimumSize.iWidth = iImageSize.iWidth; |
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iMinimumSize.iHeight = iImageSize.iHeight; |
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273 |
|
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// scale minimum size inside the screen |
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FitToCoverBox( |
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iMinimumSize.iWidth, |
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iMinimumSize.iHeight, |
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iScreenSize.iWidth, |
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iScreenSize.iHeight ); |
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280 |
|
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// check if the image is large enough for zooming |
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TReal32 zoomFactor = |
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( iImageSize.iWidth * iImageSize.iHeight ) / |
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( iScreenSize.iWidth * iScreenSize.iHeight ); |
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// if combined zoom factor is big enough then zoom |
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// so if image is for example half the width but double the height of screen |
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287 |
// we dont zoom |
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if( zoomFactor > KMinZoomAndPanFactor ) |
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289 |
{ |
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// the image should be zoomed, figure out if its |
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// from screen size -> image size * KOptimalZoomAndPanFactor or |
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// from screen size -> image size * KMaxZoomAndPanFactor |
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293 |
// set maximum size to image dimensions multiplied |
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// by KShwOptimalZoomAndPanFactor |
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// this defines how much we want the max zoom |
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// to be in optimal case |
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iMaximumSize.iWidth = iImageSize.iWidth * KOptimalZoomAndPanFactor; |
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298 |
iMaximumSize.iHeight = iImageSize.iHeight * KOptimalZoomAndPanFactor; |
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// check if the image is large enough for zooming, |
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300 |
// only need to check either coordinate as aspect ratio is kept |
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// Images between screen size and screen size * KMaxZoomAndPanFactor |
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// get zoomed between screen size and screen size * KMaxZoomAndPanFactor |
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if( ( iMaximumSize.iWidth < iMinimumSize.iWidth * KMaxZoomAndPanFactor )|| |
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( iMaximumSize.iHeight < iMinimumSize.iHeight * KMaxZoomAndPanFactor ) ) |
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305 |
{ |
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306 |
// image is too small from either dimension |
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// so zoom from minimum size to Screen x KMaxZoomAndPanFactor |
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308 |
FitToCoverBox( |
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309 |
iMaximumSize.iWidth, |
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310 |
iMaximumSize.iHeight, |
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iScreenSize.iWidth * KMaxZoomAndPanFactor, |
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iScreenSize.iHeight * KMaxZoomAndPanFactor ); |
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} |
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// calculate maximum Width and Height for this image |
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// the maximum thumbnailsize defines the maximum amount of pixels |
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// we should ever load. We need to adjust this box to have the |
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// same aspect ratio of the image; so in short: |
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// same amount of pixels than maximum but aspect ratio of image |
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TReal32 maxWidth = aMaximumSize.iWidth; |
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TReal32 maxHeight = aMaximumSize.iHeight; |
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// calculate the image size difference and take square root to get |
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// multiplier for both width and height, ignore error |
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// maximumWidth * maximumHeight |
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// multiplier = sqrt( ---------------------------- ) |
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// imagewidth * imageheight |
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TReal64 multiplier; |
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(void)Math::Sqrt( multiplier, |
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( maxHeight * maxWidth ) / |
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( iImageSize.iWidth * iImageSize.iHeight ) ); |
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// maxwidth = imagewidth * multiplier |
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TReal32 maximumWidth = multiplier * iImageSize.iWidth; |
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// maxheight = imageheight * multiplier |
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TReal32 maximumHeight = multiplier * iImageSize.iHeight; |
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// then fit the maximum size inside that box |
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FitInsideBox( |
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iMaximumSize.iWidth, iMaximumSize.iHeight, |
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maximumWidth, maximumHeight ); |
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} |
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else |
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{ |
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// not enough to zoom so just streth to screen size. |
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// set maximum to be minimum |
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iMaximumSize.iWidth = iMinimumSize.iWidth; |
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iMaximumSize.iHeight = iMinimumSize.iHeight; |
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} |
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|
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} |
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348 |