author | hgs |
Thu, 14 Oct 2010 18:35:08 +0300 | |
changeset 60 | 5dafecb0892a |
parent 0 | 15bf7259bb7c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2007 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: Implements a brush that is able to draw images. |
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* |
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*/ |
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#include "uiacceltk/HuiImageBrush.h" // Class definition |
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#include "uiacceltk/HuiDrawing.h" |
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#include "uiacceltk/HuiVisual.h" |
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#include "uiacceltk/HuiUtil.h" |
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EXPORT_C CHuiImageBrush* |
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CHuiImageBrush::NewL(const THuiImage & aImage) |
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{ |
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CHuiImageBrush* self = NewLC(aImage); |
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CleanupStack::Pop(); |
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return self; |
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} |
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EXPORT_C CHuiImageBrush* CHuiImageBrush::NewLC(const THuiImage & aImage) |
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{ |
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CHuiImageBrush* self = new (ELeave) CHuiImageBrush(aImage); |
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CleanupStack::PushL(self); |
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return self; |
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} |
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CHuiImageBrush::CHuiImageBrush(const THuiImage & aImage) |
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: iImage(aImage), |
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iScaleMode(CHuiImageVisual::EScaleFit), |
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iLeftBorderWidth(0), |
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iRightBorderWidth(0), |
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iTopBorderWidth(0), |
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iBottomBorderWidth(0) |
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{ |
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SetClipToVisual(EFalse); |
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iScale.Set(1.f); |
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iImageOffset.iX.Set(0.f); |
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iImageOffset.iY.Set(0.f); |
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} |
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EXPORT_C CHuiImageBrush::~CHuiImageBrush() |
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{ |
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} |
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EXPORT_C void CHuiImageBrush::SetScaleMode( |
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CHuiImageVisual::TScaleMode aScaleMode) |
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{ |
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iScaleMode = aScaleMode; |
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SetChanged(); |
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} |
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EXPORT_C void CHuiImageBrush::SetImage(const THuiImage& aImage) |
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{ |
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iImage = aImage; |
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SetChanged(); |
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} |
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EXPORT_C const THuiImage& CHuiImageBrush::Image() const |
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{ |
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return iImage; |
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} |
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EXPORT_C void CHuiImageBrush::SetBorders(TInt aLeftBorderPixels, |
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TInt aRightBorderPixels, |
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TInt aTopBorderPixels, |
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TInt aBottomBorderPixels) |
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{ |
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iLeftBorderWidth = aLeftBorderPixels; |
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iRightBorderWidth = aRightBorderPixels; |
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iTopBorderWidth = aTopBorderPixels; |
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iBottomBorderWidth = aBottomBorderPixels; |
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SetChanged(); |
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} |
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EXPORT_C TBool CHuiImageBrush::BorderDrawingEnabled() const |
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{ |
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return ((iLeftBorderWidth!=0) || (iRightBorderWidth!=0) |
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|| (iTopBorderWidth!=0) || (iBottomBorderWidth!=0)); |
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} |
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EXPORT_C TBool CHuiImageBrush::CenterDrawingEnabled() const |
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{ |
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if(!iImage.HasTexture()) |
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{ |
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return EFalse; |
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} |
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// determine if there are center pixels available inside borders |
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106 |
// if not, we can't draw the center.. |
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107 |
TSize imageSize = iImage.Texture().Size(); |
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108 |
if(((imageSize.iWidth - iLeftBorderWidth) - iRightBorderWidth <= 0) |
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109 |
|| ((imageSize.iHeight - iTopBorderWidth) - iBottomBorderWidth <= 0)) |
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110 |
{ |
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111 |
return EFalse; |
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112 |
} |
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113 |
|
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114 |
return ETrue; |
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115 |
} |
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116 |
|
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117 |
EXPORT_C void CHuiImageBrush::ExpandVisualRect(TRect& aRect) const |
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118 |
{ |
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119 |
if ( CenterDrawingEnabled() ) |
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120 |
{ |
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121 |
THuiRealRect contentArea(aRect); |
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122 |
|
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123 |
// Get the scaled size |
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124 |
THuiRealSize imageSize( iImage.Texture().Size() ); |
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if ( iScaleMode == CHuiImageVisual::EScaleFit ) |
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126 |
{ |
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127 |
imageSize = contentArea.Size() * iScale.Now(); |
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128 |
} |
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129 |
else |
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130 |
{ |
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131 |
TReal32 scale = HuiUtil::CalculateScaleFactorFromScaleMode( |
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132 |
contentArea.Size(), |
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133 |
iImage.Texture().Size(), |
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134 |
iScaleMode, |
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135 |
iScale.Now() ); |
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136 |
imageSize = imageSize * scale; |
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137 |
} |
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138 |
|
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139 |
THuiRealPoint mid = contentArea.Center(); |
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140 |
|
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141 |
// Move mid point based on the offset |
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142 |
TReal32 xOffset = 0; |
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143 |
TReal32 yOffset = 0; |
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144 |
|
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145 |
xOffset = contentArea.Width() * iImageOffset.iX.Now(); |
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146 |
yOffset = contentArea.Height() * iImageOffset.iY.Now(); |
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147 |
|
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148 |
mid += THuiRealPoint( xOffset, yOffset ); |
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149 |
|
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150 |
// expand the dirty area rect if needed |
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151 |
aRect.iTl.iX = Min( aRect.iTl.iX, mid.iX-imageSize.iWidth/2.f ); |
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152 |
aRect.iTl.iY = Min( aRect.iTl.iY, mid.iY-imageSize.iHeight/2.f ); |
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153 |
aRect.iBr.iX = Max( aRect.iBr.iX, mid.iX+imageSize.iWidth/2.f ); |
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154 |
aRect.iBr.iY = Max( aRect.iBr.iY, mid.iY+imageSize.iHeight/2.f ); |
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155 |
} |
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|
156 |
|
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157 |
if(BorderDrawingEnabled()) |
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158 |
{ |
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159 |
// expand the area of the content to include the border: |
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160 |
aRect.Grow((Max(iLeftBorderWidth, 0) + Max(iRightBorderWidth, 0)) / 2, |
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161 |
(Max(iTopBorderWidth, 0) + Max(iBottomBorderWidth, 0)) / 2); |
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162 |
// move the area to justify the border width differencies |
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163 |
aRect.Move((Max(iRightBorderWidth, 0)-Max(iLeftBorderWidth, 0)) / 2, |
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|
164 |
(Max(iTopBorderWidth, 0)-Max(iBottomBorderWidth, 0)) / 2); |
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|
165 |
} |
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|
166 |
} |
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|
167 |
|
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|
168 |
TBool CHuiImageBrush::Changed() const |
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|
169 |
{ |
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170 |
if ( CHuiBrush::Changed() ) |
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|
171 |
{ |
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172 |
return ETrue; |
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|
173 |
} |
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174 |
return iImageOffset.Changed() || iScale.Changed() || iImage.Changed(); |
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175 |
} |
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|
176 |
|
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|
177 |
void CHuiImageBrush::ClearChanged() |
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178 |
{ |
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179 |
CHuiBrush::ClearChanged(); |
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180 |
iImageOffset.ClearChanged(); |
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181 |
iScale.ClearChanged(); |
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182 |
iImage.ClearChanged(); |
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183 |
} |
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|
184 |
|
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185 |
EXPORT_C void CHuiImageBrush::Draw(CHuiGc& aGc, const MHuiBrushGuide& aGuide) const |
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186 |
{ |
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|
187 |
|
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188 |
TBool borderDrawing = BorderDrawingEnabled(); |
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|
189 |
TBool centerDrawing = CenterDrawingEnabled(); |
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|
190 |
|
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|
191 |
TReal32 opacity = aGuide.BrushOpacity() * iOpacity.Now(); |
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|
192 |
aGc.SetPenColor(KRgbWhite); |
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193 |
aGc.SetPenAlpha(TInt(opacity * 255.f)); |
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|
194 |
|
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195 |
if(centerDrawing) |
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196 |
{ |
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|
197 |
THuiRealRect contentArea = aGuide.BrushRect(); |
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|
198 |
|
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|
199 |
aGc.Enable(CHuiGc::EFeatureBlending); |
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|
200 |
|
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|
201 |
if(borderDrawing) |
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|
202 |
{ |
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|
203 |
// contract the content area if the borders |
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204 |
// have been defined to be inside |
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205 |
if(iLeftBorderWidth < 0) |
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206 |
{ |
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|
207 |
contentArea.iTl.iX -= iLeftBorderWidth; |
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208 |
} |
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|
209 |
if(iRightBorderWidth < 0) |
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210 |
{ |
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contentArea.iBr.iX += iRightBorderWidth; |
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} |
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|
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if(iTopBorderWidth < 0) |
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{ |
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|
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contentArea.iTl.iY -= iTopBorderWidth; |
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} |
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if(iBottomBorderWidth < 0) |
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|
218 |
{ |
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|
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contentArea.iBr.iY += iBottomBorderWidth; |
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} |
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|
221 |
|
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// Read in the original texture coordinates (NOTE: not affected |
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// by any renderer-specific texcoord manipulations, like the Gles POT trick). |
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TSize imageSize(iImage.Texture().Size()); |
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THuiRealPoint tl = iImage.TopLeft(), br = iImage.BottomRight(); |
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TReal32 widthU = br.iX - tl.iX; |
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TReal32 heightV = br.iY - tl.iY; |
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|
228 |
|
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// Remove borders by adjusting texture coordinates. |
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// But don't divide by 0 |
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if ( imageSize.iWidth != 0 && imageSize.iHeight != 0 ) |
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232 |
{ |
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|
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tl.iX += ((TReal32)Abs(iLeftBorderWidth) / (TReal32)imageSize.iWidth) * widthU; |
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br.iX -= ((TReal32)Abs(iRightBorderWidth) / (TReal32)imageSize.iWidth) * widthU; |
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|
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tl.iY += ((TReal32)Abs(iTopBorderWidth) / (TReal32)imageSize.iHeight) * heightV; |
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|
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br.iY -= ((TReal32)Abs(iBottomBorderWidth) / (TReal32)imageSize.iHeight) * heightV; |
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|
237 |
} |
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|
238 |
|
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// Create temporary Image with adjusted texcoords |
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THuiImage imageBordersRemoved; |
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|
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imageBordersRemoved.SetTexture(iImage.TextureIf()); |
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|
242 |
imageBordersRemoved.SetTexCoords(tl.iX, tl.iY, br.iX, br.iY); |
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|
243 |
|
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|
244 |
// Draw the image without the borders. |
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245 |
aGc.DrawStretchImage(CHuiGc::EStretchFull, |
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|
246 |
imageBordersRemoved, |
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|
247 |
contentArea); |
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248 |
} |
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|
249 |
else |
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|
250 |
{ |
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|
251 |
|
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252 |
TReal32 scale = HuiUtil::CalculateScaleFactorFromScaleMode( |
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contentArea.Size(), |
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|
254 |
iImage.Texture().Size(), |
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255 |
iScaleMode, |
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|
256 |
iScale.Now() ); |
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|
257 |
|
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|
258 |
// Determine offset. |
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259 |
TReal32 xOffset = 0; |
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|
260 |
TReal32 yOffset = 0; |
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|
261 |
|
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|
262 |
xOffset = aGuide.BrushRect().Width() * iImageOffset.iX.Now(); |
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|
263 |
yOffset = aGuide.BrushRect().Height() * iImageOffset.iY.Now(); |
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|
264 |
|
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|
265 |
|
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|
266 |
// Do scaling |
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|
267 |
TBool doTranslate = !HuiUtil::RealCompare( scale, 1.f ) || !HuiUtil::RealCompare(xOffset,0.f) || !HuiUtil::RealCompare(yOffset,0.f); |
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Revision: 201003
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|
268 |
if( doTranslate ) |
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Revision: 201003
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|
269 |
{ |
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Revision: 201003
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|
270 |
/** @todo GC must provide some support for transformations. */ |
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Revision: 201003
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|
271 |
aGc.Push(EHuiGcMatrixModel); |
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|
272 |
|
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|
273 |
// Rotate around the midpoint of the visual. |
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Revision: 201003
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|
274 |
THuiRealPoint mid = contentArea.Center(); |
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Revision: 201003
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|
275 |
|
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Revision: 201003
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|
276 |
aGc.Translate(EHuiGcMatrixModel, mid.iX + xOffset, mid.iY + yOffset, 0.f); |
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Revision: 201003
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parents:
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|
277 |
if( !HuiUtil::RealCompare( scale, 1.f ) ) |
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Revision: 201003
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|
278 |
{ |
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Revision: 201003
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|
279 |
aGc.Scale(EHuiGcMatrixModel, scale, scale, 1.f); |
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Revision: 201003
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|
280 |
} |
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Revision: 201003
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|
281 |
aGc.Translate(EHuiGcMatrixModel, -mid.iX, -mid.iY, 0.f); |
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Revision: 201003
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parents:
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|
282 |
} |
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Revision: 201003
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diff
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|
283 |
|
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Revision: 201003
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parents:
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|
284 |
// Use the appropriate alignment in the graphics context. |
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Revision: 201003
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|
285 |
if(iScaleMode == CHuiImageVisual::EScaleFit) |
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Revision: 201003
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diff
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|
286 |
{ |
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Revision: 201003
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|
287 |
aGc.SetAlign(EHuiAlignHLeft, EHuiAlignVTop); |
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Revision: 201003
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parents:
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|
288 |
} |
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Revision: 201003
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|
289 |
else |
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Revision: 201003
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diff
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|
290 |
{ |
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Revision: 201003
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|
291 |
aGc.SetAlign(EHuiAlignHCenter, EHuiAlignVCenter); |
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Revision: 201003
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parents:
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|
292 |
} |
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Revision: 201003
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parents:
diff
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|
293 |
|
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Revision: 201003
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parents:
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|
294 |
// draw the image |
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Revision: 201003
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|
295 |
if(iScaleMode == CHuiImageVisual::EScaleFit) |
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Revision: 201003
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parents:
diff
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|
296 |
{ |
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Revision: 201003
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parents:
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|
297 |
aGc.DrawImage(iImage, contentArea.iTl, contentArea.Size()); |
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Revision: 201003
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parents:
diff
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|
298 |
} |
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Revision: 201003
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parents:
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|
299 |
else |
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Revision: 201003
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parents:
diff
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|
300 |
{ |
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Revision: 201003
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parents:
diff
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|
301 |
aGc.DrawImage(iImage, contentArea); |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
302 |
} |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
303 |
|
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Revision: 201003
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parents:
diff
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|
304 |
// Restore original transformation. |
15bf7259bb7c
Revision: 201003
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parents:
diff
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|
305 |
if( doTranslate ) |
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Revision: 201003
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parents:
diff
changeset
|
306 |
{ |
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Revision: 201003
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parents:
diff
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|
307 |
aGc.Pop(EHuiGcMatrixModel); |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
308 |
} |
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Revision: 201003
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parents:
diff
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|
309 |
|
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Revision: 201003
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diff
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|
310 |
} |
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Revision: 201003
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parents:
diff
changeset
|
311 |
|
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Revision: 201003
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parents:
diff
changeset
|
312 |
} |
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Revision: 201003
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parents:
diff
changeset
|
313 |
|
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Revision: 201003
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parents:
diff
changeset
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if(borderDrawing) |
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{ |
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THuiRealRect contentArea = aGuide.BrushRect(); |
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|
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// expand the area of the content to include the border: |
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contentArea.Grow((Max(iLeftBorderWidth, 0) + Max(iRightBorderWidth, 0)) / 2, |
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(Max(iTopBorderWidth, 0) + Max(iBottomBorderWidth, 0)) / 2); |
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// move the area to justify the border width differencies |
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contentArea.Move((Max(iRightBorderWidth, 0)-Max(iLeftBorderWidth, 0)) / 2, |
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(Max(iTopBorderWidth, 0)-Max(iBottomBorderWidth, 0)) / 2); |
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|
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aGc.DrawBorders(contentArea.Round(), |
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Abs(iLeftBorderWidth), |
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Abs(iRightBorderWidth), |
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Abs(iTopBorderWidth), |
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Abs(iBottomBorderWidth), |
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CHuiGc::EBorderFixedCorners, |
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&iImage); |
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} |
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333 |
|
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} |