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: Implementation of CHuiLinearGradientBrush - a Brush that is |
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* able to draw linear color gradients. |
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* |
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*/ |
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|
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|
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#include "uiacceltk/HuiGradientBrush.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 CHuiGradientBrush* CHuiGradientBrush::NewL() |
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{ |
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CHuiGradientBrush* self = NewLC(); |
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CleanupStack::Pop(); |
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return self; |
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} |
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|
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EXPORT_C CHuiGradientBrush* CHuiGradientBrush::NewLC() |
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{ |
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CHuiGradientBrush* self = new (ELeave) CHuiGradientBrush(); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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return self; |
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} |
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CHuiGradientBrush::CHuiGradientBrush() |
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: CHuiBrush(), |
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iDirection(EDirectionRight) |
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{ |
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} |
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void CHuiGradientBrush::ConstructL() |
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{ |
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SColor defaultColor; |
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defaultColor.iPosition = 0; |
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defaultColor.iColor = KRgbWhite; |
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defaultColor.iOpacity = 1.0; |
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User::LeaveIfError(iColors.Append(defaultColor)); |
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} |
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CHuiGradientBrush::~CHuiGradientBrush() |
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{ |
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iColors.Reset(); |
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} |
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EXPORT_C void CHuiGradientBrush::SetDirection(TDirection aDirection) |
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{ |
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iDirection = aDirection; |
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SetChanged(); |
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} |
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void CHuiGradientBrush::Draw(CHuiGc& aGc, const MHuiBrushGuide& aGuide) const |
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{ |
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TRect content = aGuide.BrushRect(); |
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TReal32 opacity = aGuide.BrushOpacity() * iOpacity.Now(); |
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if(opacity <= 0) |
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{ |
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return; |
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} |
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TBool useTexture = EFalse; |
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TReal32 texCoords[8]; |
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THuiRealRect texCoordRect; |
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aGc.SetPenAlpha(TInt(opacity * 255)); |
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if(iImage.HasTexture()) |
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{ |
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useTexture = ETrue; |
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iImage.GetTexCoords(texCoords); |
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aGc.Enable(CHuiGc::EFeatureTexturing); |
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iImage.Texture().Bind(); |
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} |
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else |
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{ |
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aGc.Disable(CHuiGc::EFeatureTexturing); |
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} |
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// Optimization for gradientbrush (MNIA-7G79GD). Draws a simple rect with one color |
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// if there really isn't anything to gradient. |
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// Updated optimization to work with single semi-transparent color |
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if(iColors.Count() == 1 && !iImage.HasTexture() && (iColors[0].iOpacity * opacity) >= 1 ) |
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{ |
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|
107 |
aGc.SetPenColor(iColors[0].iColor); |
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parents:
diff
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|
108 |
aGc.DrawRect(content); |
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diff
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|
109 |
return; |
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diff
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|
110 |
} |
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parents:
diff
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|
111 |
|
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parents:
diff
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|
112 |
aGc.Enable(CHuiGc::EFeatureBlending); |
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parents:
diff
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|
113 |
|
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|
114 |
TInt segments = iColors.Count() - 1; |
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diff
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|
115 |
if(segments <= 0) |
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parents:
diff
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|
116 |
{ |
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|
117 |
segments = 1; |
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|
118 |
} |
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parents:
diff
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|
119 |
|
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Revision: 201003
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|
120 |
TInt length = content.Width(); |
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Revision: 201003
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parents:
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|
121 |
TBool isHoriz = ETrue; |
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|
122 |
TBool invert = EFalse; |
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|
123 |
CHuiGc::TGradientType gradientType; |
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diff
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|
124 |
|
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|
125 |
switch(iDirection) |
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diff
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|
126 |
{ |
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|
127 |
default: |
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|
128 |
case EDirectionUp: |
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|
129 |
gradientType = CHuiGc::EGradientLinearUp; |
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|
130 |
isHoriz = EFalse; |
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|
131 |
length = content.Height(); |
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|
132 |
invert = ETrue; |
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Revision: 201003
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parents:
diff
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|
133 |
break; |
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parents:
diff
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|
134 |
|
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Revision: 201003
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parents:
diff
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|
135 |
case EDirectionDown: |
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Revision: 201003
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parents:
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|
136 |
gradientType = CHuiGc::EGradientLinearDown; |
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|
137 |
isHoriz = EFalse; |
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Revision: 201003
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parents:
diff
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|
138 |
length = content.Height(); |
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Revision: 201003
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parents:
diff
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|
139 |
break; |
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parents:
diff
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|
140 |
|
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Revision: 201003
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parents:
diff
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|
141 |
case EDirectionRight: |
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Revision: 201003
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parents:
diff
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|
142 |
gradientType = CHuiGc::EGradientLinearRight; |
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Revision: 201003
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parents:
diff
changeset
|
143 |
break; |
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Revision: 201003
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parents:
diff
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|
144 |
|
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
145 |
case EDirectionLeft: |
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Revision: 201003
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parents:
diff
changeset
|
146 |
gradientType = CHuiGc::EGradientLinearLeft; |
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Revision: 201003
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parents:
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|
147 |
invert = ETrue; |
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Revision: 201003
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parents:
diff
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|
148 |
break; |
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Revision: 201003
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parents:
diff
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|
149 |
} |
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Revision: 201003
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parents:
diff
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|
150 |
|
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Revision: 201003
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parents:
diff
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|
151 |
for(TInt start = 0; start < segments; ++start) |
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Revision: 201003
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parents:
diff
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|
152 |
{ |
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Revision: 201003
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parents:
diff
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|
153 |
TReal32 startPosition = iColors[start].iPosition; |
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Revision: 201003
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parents:
diff
changeset
|
154 |
|
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Revision: 201003
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parents:
diff
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|
155 |
TInt end = start + 1; |
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Revision: 201003
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parents:
diff
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|
156 |
TReal32 endPosition; |
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Revision: 201003
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parents:
diff
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|
157 |
if(end >= iColors.Count()) |
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Revision: 201003
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parents:
diff
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|
158 |
{ |
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Revision: 201003
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parents:
diff
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|
159 |
end = iColors.Count() - 1; |
15bf7259bb7c
Revision: 201003
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parents:
diff
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|
160 |
endPosition = 1; |
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Revision: 201003
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parents:
diff
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|
161 |
} |
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Revision: 201003
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parents:
diff
changeset
|
162 |
else |
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Revision: 201003
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parents:
diff
changeset
|
163 |
{ |
15bf7259bb7c
Revision: 201003
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parents:
diff
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|
164 |
endPosition = iColors[end].iPosition; |
15bf7259bb7c
Revision: 201003
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parents:
diff
changeset
|
165 |
} |
15bf7259bb7c
Revision: 201003
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parents:
diff
changeset
|
166 |
|
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
167 |
if(iColors[start].iOpacity <= 0 && iColors[end].iOpacity <= 0) |
15bf7259bb7c
Revision: 201003
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parents:
diff
changeset
|
168 |
{ |
15bf7259bb7c
Revision: 201003
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parents:
diff
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|
169 |
// Won't be visible. |
15bf7259bb7c
Revision: 201003
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parents:
diff
changeset
|
170 |
continue; |
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
171 |
} |
15bf7259bb7c
Revision: 201003
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parents:
diff
changeset
|
172 |
|
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
173 |
if(invert) |
15bf7259bb7c
Revision: 201003
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parents:
diff
changeset
|
174 |
{ |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
175 |
// Inverted direction. |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
176 |
startPosition = 1 - startPosition; |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
177 |
endPosition = 1 - endPosition; |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
178 |
} |
15bf7259bb7c
Revision: 201003
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parents:
diff
changeset
|
179 |
|
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
180 |
TInt beginCoord = (isHoriz? content.iTl.iX : content.iTl.iY); |
15bf7259bb7c
Revision: 201003
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parents:
diff
changeset
|
181 |
TInt startCoord = beginCoord + TInt(startPosition * length); |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
182 |
TInt endCoord = beginCoord + TInt(endPosition * length); |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
183 |
|
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
184 |
TRect segmentRect; |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
185 |
|
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
186 |
if(isHoriz) |
15bf7259bb7c
Revision: 201003
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parents:
diff
changeset
|
187 |
{ |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
188 |
segmentRect.iTl = TPoint(startCoord, content.iTl.iY); |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
189 |
segmentRect.iBr = TPoint(endCoord, content.iBr.iY); |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
190 |
} |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
191 |
else |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
192 |
{ |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
193 |
segmentRect.iTl = TPoint(content.iTl.iX, startCoord); |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
194 |
segmentRect.iBr = TPoint(content.iBr.iX, endCoord); |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
195 |
} |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
196 |
|
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
197 |
// Calculate texture coordinates, if necessary. |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
198 |
if(useTexture) |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
199 |
{ |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
200 |
if(isHoriz) |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
201 |
{ |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
202 |
texCoordRect.iTl.iX = HuiUtil::Interpolate(startPosition, texCoords[0], texCoords[2]); |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
203 |
texCoordRect.iTl.iY = texCoords[3]; |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
204 |
texCoordRect.iBr.iX = HuiUtil::Interpolate(endPosition, texCoords[0], texCoords[2]); |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
205 |
texCoordRect.iBr.iY = texCoords[5]; |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
206 |
} |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
207 |
else |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
208 |
{ |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
209 |
texCoordRect.iTl.iX = texCoords[0]; |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
210 |
texCoordRect.iTl.iY = HuiUtil::Interpolate(startPosition, texCoords[3], texCoords[5]); |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
211 |
texCoordRect.iBr.iX = texCoords[2]; |
15bf7259bb7c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
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texCoordRect.iBr.iY = HuiUtil::Interpolate(endPosition, texCoords[3], texCoords[5]); |
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} |
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} |
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aGc.DrawGradient(gradientType, segmentRect, |
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iColors[start].iColor, iColors[end].iColor, |
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iColors[start].iOpacity * opacity, |
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iColors[end].iOpacity * opacity, |
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useTexture? &texCoordRect : NULL); |
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} |
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aGc.Disable(CHuiGc::EFeatureBlending); |
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} |
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|
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|
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EXPORT_C void CHuiGradientBrush::SetColor(const TRgb& aColor, TReal32 aOpacity) __SOFTFP |
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{ |
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while(iColors.Count() > 1) |
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{ |
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iColors.Remove(iColors.Count() - 1); |
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} |
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|
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SColor color; |
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color.iPosition = 0; |
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color.iColor = aColor; |
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color.iOpacity = aOpacity; |
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|
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iColors[0] = color; |
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|
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SetChanged(); |
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} |
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|
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|
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EXPORT_C TRgb CHuiGradientBrush::Color(TInt aIndex) const |
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{ |
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// make sure aIndex is not out of bounds |
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if ( aIndex < iColors.Count() ) |
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{ |
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return iColors[aIndex].iColor; |
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} |
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else |
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{ |
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// default color always exists |
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return iColors[0].iColor; |
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} |
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} |
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|
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|
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EXPORT_C TReal32 CHuiGradientBrush::Opacity(TInt aIndex) const __SOFTFP |
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{ |
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// make sure aIndex is not out of bounds |
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// make sure aIndex is not out of bounds |
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if ( aIndex < iColors.Count() ) |
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{ |
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return iColors[aIndex].iOpacity; |
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} |
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else |
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{ |
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// default color always exists |
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return iColors[0].iOpacity; |
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} |
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} |
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|
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|
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EXPORT_C void CHuiGradientBrush::AppendColorL(TReal32 aPosition, |
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const TRgb& aColor, |
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TReal32 aOpacity) __SOFTFP |
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{ |
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SColor color; |
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|
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color.iPosition = aPosition; |
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color.iColor = aColor; |
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color.iOpacity = aOpacity; |
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User::LeaveIfError(iColors.Append(color)); |
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|
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SetChanged(); |
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} |
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|
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|
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EXPORT_C void CHuiGradientBrush::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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|
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|
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EXPORT_C const THuiImage& CHuiGradientBrush::Image() const |
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{ |
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return iImage; |
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} |