uiacceltk/hitchcock/coretoolkit/src/HuiDropShadowBrush.cpp
changeset 0 15bf7259bb7c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uiacceltk/hitchcock/coretoolkit/src/HuiDropShadowBrush.cpp	Tue Feb 02 07:56:43 2010 +0200
@@ -0,0 +1,202 @@
+/*
+* Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:   ?Description
+*
+*/
+
+
+
+#include "uiacceltk/HuiDropShadowBrush.h"  // Class definition
+#include "uiacceltk/HuiDrawing.h"
+#include "uiacceltk/HuiVisual.h"
+#include "uiacceltk/HuiUtil.h"
+
+
+/** Default shadow softness. */
+const TReal32 KHuiDropShadowBrushSoftness = 3.f;
+
+/** Default shadow opacity. */
+const TReal32 KHuiDropShadowBrushOpacity = 100.f/255.f;
+
+
+EXPORT_C CHuiDropShadowBrush* CHuiDropShadowBrush::NewL(const THuiMetric& aDepth)
+    {
+    CHuiDropShadowBrush* self = NewLC(aDepth);
+    CleanupStack::Pop();
+    return self;
+    }
+
+
+EXPORT_C CHuiDropShadowBrush* CHuiDropShadowBrush::NewLC(const THuiMetric& aDepth)
+    {
+    CHuiDropShadowBrush* self = new (ELeave) CHuiDropShadowBrush(aDepth);
+    CleanupStack::PushL(self);
+    return self;
+    }
+
+
+EXPORT_C CHuiDropShadowBrush* CHuiDropShadowBrush::NewL(TInt aDepth)
+    {
+    CHuiDropShadowBrush* self = NewLC(aDepth);
+    CleanupStack::Pop();
+    return self;
+    }
+
+
+EXPORT_C CHuiDropShadowBrush* CHuiDropShadowBrush::NewLC(TInt aDepth)
+    {
+    CHuiDropShadowBrush* self = new (ELeave) CHuiDropShadowBrush(aDepth);
+    CleanupStack::PushL(self);
+    return self;
+    }
+
+CHuiDropShadowBrush::CHuiDropShadowBrush(const THuiMetric& aDepth)
+        : CHuiBrush(),
+          iSoftness(KHuiDropShadowBrushSoftness),
+          iDepth(aDepth.iMagnitude),
+          iDepthMetric(aDepth),
+          iSoftnessMetric(KHuiDropShadowBrushSoftness),
+          iColor(TRgb(0, 0, 110))
+    {
+    SetClipToVisual(EFalse);
+    iOpacity.Set(KHuiDropShadowBrushOpacity);
+    }
+
+CHuiDropShadowBrush::CHuiDropShadowBrush(TInt aDepth)
+        : CHuiBrush(),
+          iSoftness(KHuiDropShadowBrushSoftness),
+          iDepth(TReal32(aDepth)),
+          iDepthMetric(aDepth),
+          iSoftnessMetric(KHuiDropShadowBrushSoftness),
+          iColor(TRgb(0, 0, 110)) 
+    {
+    SetClipToVisual(EFalse);
+    iOpacity.Set(KHuiDropShadowBrushOpacity);
+    }
+
+
+CHuiDropShadowBrush::~CHuiDropShadowBrush()
+    {
+    }
+    
+TBool CHuiDropShadowBrush::Changed() const
+    {
+    if ( CHuiBrush::Changed() )
+        {
+        return ETrue;
+        }
+    return iSoftness.Changed() || iDepth.Changed();
+    }
+
+void CHuiDropShadowBrush::ClearChanged()
+    {
+    CHuiBrush::ClearChanged();
+    iSoftness.ClearChanged();
+    iDepth.ClearChanged();
+    }
+
+void CHuiDropShadowBrush::Draw(CHuiGc& aGc, const MHuiBrushGuide& aGuide) const
+    {
+    THuiRealRect realRect = aGuide.BrushRect();
+    TReal32 opacity = aGuide.BrushOpacity() * iOpacity.Now();
+    TReal32 distanceInPixels = DepthInPixels(BrushGuide());
+    TReal32 softnessInPixels = SoftnessInPixels(BrushGuide());
+
+    TReal32 borderWidth = (softnessInPixels + distanceInPixels/2.f); //distance;
+
+    aGc.Push(EHuiGcMatrixModel);
+    aGc.Translate(EHuiGcMatrixModel, distanceInPixels, distanceInPixels, 0.0f);
+
+    borderWidth = Min( borderWidth, realRect.Width()/2.f );
+    borderWidth = Min( borderWidth, realRect.Height()/2.f );
+
+    aGc.SetPenColor(iColor);
+    aGc.SetPenAlpha(TInt(opacity * 255));
+
+    const CHuiTexture* shadowTexture = NULL;
+    TInt err = aGuide.BrushSkin().GetTexture(EHuiSkinShadowTexture, shadowTexture);
+    if (err!=KErrNone)
+    	{
+    	ASSERT(EFalse); // failed to get the shadow texture - unable to proceed!
+    	return;
+	    }
+    THuiImage dropShadowImage(*shadowTexture);
+
+    aGc.Disable(CHuiGc::EFeatureDepthWrite);
+
+	TRect roundedRect = realRect.Round();
+	// draw drop shadow borders
+    aGc.DrawBorders(roundedRect, borderWidth, borderWidth, borderWidth, borderWidth, 
+                    CHuiGc::EBorderImage, &dropShadowImage);                   
+    
+    aGc.Disable(CHuiGc::EFeatureTexturing);
+    roundedRect.Shrink( HUI_ROUND_FLOAT_TO_INT(borderWidth), HUI_ROUND_FLOAT_TO_INT(borderWidth));
+    aGc.DrawRect(roundedRect);
+    aGc.Enable(CHuiGc::EFeatureDepthWrite);
+
+    aGc.Pop(EHuiGcMatrixModel);
+    }
+
+
+void CHuiDropShadowBrush::ExpandVisualRect(TRect& aRect) const
+    {
+    TReal32 depthInPixels = DepthInPixels(BrushGuide());
+    
+    if ( depthInPixels > 0 )
+        {
+        // Currently support only drop shadow on the bottom right of the visual
+        aRect.iBr.iX += HUI_ROUND_FLOAT_TO_INT( depthInPixels );
+        aRect.iBr.iY += HUI_ROUND_FLOAT_TO_INT( depthInPixels );
+        }
+    }
+    
+EXPORT_C void CHuiDropShadowBrush::SetDepth(const THuiMetric& aDepth)
+    {
+    iDepthMetric = aDepth;
+    iDepth.Set(aDepth.iMagnitude);    
+    }
+
+EXPORT_C void CHuiDropShadowBrush::SetSoftness(const THuiMetric& aSoftness)
+    {
+    iSoftnessMetric = aSoftness;
+    iSoftness.Set(aSoftness.iMagnitude);    
+    }
+
+EXPORT_C void CHuiDropShadowBrush::SetColor(const TRgb& aColor)
+    {
+    iColor = aColor;    
+    }
+    
+TReal32 CHuiDropShadowBrush::DepthInPixels(const CHuiVisual* aVisual) const
+    {
+    return ValueInPixels(aVisual, iDepth);                    
+    }
+    
+TReal32 CHuiDropShadowBrush::SoftnessInPixels(const CHuiVisual* aVisual) const
+    {
+    return ValueInPixels(aVisual, iSoftness);                            
+    }
+
+TReal32 CHuiDropShadowBrush::ValueInPixels(const CHuiVisual* aVisual, const THuiTimedValue& aValue) const
+    {
+    TReal32 valueInPixels = aValue.Now(); // Default to old pixel width
+    if (aVisual)
+        {
+        THuiMetric metric = iDepthMetric;
+        metric.iMagnitude = valueInPixels;        
+        valueInPixels = aVisual->MetricToPixels(THuiXYMetric(metric, metric)).iX; // Calculate metric width in pixels  
+        }    
+    return valueInPixels;                            
+    }
+