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os/textandloc/textrendering/textformatting/tbox/FRMFRAME.CPP
author sl@SLION-WIN7.fritz.box
Fri, 15 Jun 2012 03:10:57 +0200
changeset 0 bde4ae8d615e
permissions -rw-r--r--
First public contribution. 
     1 /*

     2 * Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 #include "FRMFRAME.H"

    20 

    21 const TInt KBorderThicknessInPixels=2;

    22 

    23 /** This constructs a TFrameOverlay, clearing all flags and initializing both 

    24 blob widths to zero. */

    25 EXPORT_C TFrameOverlay::TFrameOverlay()

    26 	:iFlags(0),iVisibleBlobWidth(0),iActiveBlobWidth(0)

    27 	{

    28     }

    29 

    30 /** Sets the visible and active blob widths to the same value in pixels.

    31 @param aWidth The visible and active blob width in pixels. */

    32 EXPORT_C void TFrameOverlay::SetBlobWidthInPixels(const TInt aWidth)

    33     {

    34 	SetVisibleBlobWidthInPixels(aWidth);

    35 	SetActiveBlobWidthInPixels(aWidth);

    36     }

    37 

    38 /** Sets the visible blob width in pixels.

    39 @param aWidth The visible blob width in pixels. */

    40 EXPORT_C void TFrameOverlay::SetVisibleBlobWidthInPixels(const TInt aWidth)

    41     {

    42 	iVisibleBlobWidth=aWidth;

    43     }

    44 

    45 /** Sets the active blob width in pixels. The active blob width should normally

    46 be at least as large as the visible blob width.

    47 @param aWidth The active blob width in pixels. */

    48 EXPORT_C void TFrameOverlay::SetActiveBlobWidthInPixels(const TInt aWidth)

    49 	{

    50 	iActiveBlobWidth=aWidth;

    51 	}

    52 

    53 /** Sets the flags which control how the frame is drawn. Adds the flags

    54 specified to the existing flag settings, which are preserved. For a description

    55 of the available flags, see the TFrameOverlayFlags enum.

    56 @param aFlag Flags to add to the existing settings. */

    57 EXPORT_C void TFrameOverlay::SetFlags(TInt aFlag)

    58     {

    59 	iFlags|=aFlag;

    60     }

    61 

    62 /** Clears the flags specified from the frame's flag settings. For a description 

    63 of the available flags, see the TFrameOverlayFlags enum.

    64 @param aFlag Flags to clear from the existing flag settings. */

    65 EXPORT_C void TFrameOverlay::ClearFlags(TInt aFlag)

    66     {

    67 	iFlags&=(~aFlag);

    68     }

    69 

    70  

    71 

    72 EXPORT_C void TFrameOverlay::SetRect(const TRect& aRect)

    73 /** Sets the picture frame rectangle.

    74 

    75 @param aRect The picture frame rectangle. */

    76     {

    77 	iRect=aRect;

    78     }

    79 

    80 /** Draws the picture frame and blobs to a graphics context using the frame's

    81 flag settings. If drawn, the frame is represented by a dotted line. The

    82 operation uses a draw mode of CGraphicsContext::EDrawModeNOTSCREEN so that the

    83 colour of each pixel which is drawn over is inverted. The frame's coordinates

    84 are set using SetRect().

    85 @param aGc The graphics context to draw to. */

    86 EXPORT_C void TFrameOverlay::XorDraw(CGraphicsContext& aGc) const

    87     {

    88 	TRect rect=iRect;

    89 	TInt blobWidth=VisibleBlobWidth();

    90 	if (iFlags&EFrameOverlayFlagBlobsInternal)

    91 		rect.Shrink(blobWidth,blobWidth);

    92 	TPoint tl=rect.iTl;

    93 	TPoint br=rect.iBr;

    94 	aGc.SetDrawMode(CGraphicsContext::EDrawModeNOTSCREEN);

    95 	aGc.SetBrushStyle(CGraphicsContext::ENullBrush);

    96 

    97 	if (iFlags&EFrameOverlayFlagShowBorder)

    98 		{

    99 		rect.Grow(blobWidth,blobWidth);

   100 		DrawDottedRectangle(aGc, rect);

   101 		}

   102 

   103 	if (blobWidth > 0)

   104 		{

   105 		TInt width=br.iX-tl.iX;

   106 		TInt height=br.iY-tl.iY;

   107 

   108 		aGc.SetPenStyle(CGraphicsContext::ESolidPen);

   109 		if (!(iFlags&EFrameOverlayFlagTopBlobsDimmed) && !(iFlags&EFrameOverlayFlagLeftBlobsDimmed))

   110 			aGc.SetBrushStyle(CGraphicsContext::ESolidBrush);

   111 		aGc.DrawRect(TRect(tl-TPoint(blobWidth,blobWidth),tl));

   112 		aGc.SetBrushStyle(CGraphicsContext::ENullBrush);

   113 

   114 		if (DrawTopAndBottom())

   115 			{

   116 			if (!(iFlags&EFrameOverlayFlagTopBlobsDimmed))

   117 				aGc.SetBrushStyle(CGraphicsContext::ESolidBrush);

   118     		aGc.DrawRect(TRect(tl+TPoint((width-blobWidth)/2,-blobWidth),tl+TPoint((width+blobWidth)/2,0)));

   119 			aGc.SetBrushStyle(CGraphicsContext::ENullBrush);

   120 			}

   121 

   122 		if (!(iFlags&EFrameOverlayFlagTopBlobsDimmed) && !(iFlags&EFrameOverlayFlagRightBlobsDimmed))

   123 			aGc.SetBrushStyle(CGraphicsContext::ESolidBrush);

   124 

   125 		aGc.DrawRect(TRect(TPoint(br.iX,tl.iY-blobWidth),TPoint(br.iX+blobWidth,tl.iY)));

   126 		aGc.SetBrushStyle(CGraphicsContext::ENullBrush);

   127 

   128 		if (DrawLeftAndRight())

   129 			{

   130  			if (!(iFlags&EFrameOverlayFlagRightBlobsDimmed))

   131 				aGc.SetBrushStyle(CGraphicsContext::ESolidBrush);

   132    			aGc.DrawRect(TRect(br-TPoint(0,(height+blobWidth)/2),br+TPoint(blobWidth,-(height-blobWidth)/2)));

   133 			aGc.SetBrushStyle(CGraphicsContext::ENullBrush);

   134 			}

   135 

   136 		if (!(iFlags&EFrameOverlayFlagRightBlobsDimmed) && !(iFlags&EFrameOverlayFlagBottomBlobsDimmed))

   137 			aGc.SetBrushStyle(CGraphicsContext::ESolidBrush);

   138 		aGc.DrawRect(TRect(br,br+TPoint(blobWidth,blobWidth)));

   139 		aGc.SetBrushStyle(CGraphicsContext::ENullBrush);

   140 

   141 		if (DrawTopAndBottom())

   142 			{

   143  			if (!(iFlags&EFrameOverlayFlagBottomBlobsDimmed))

   144 				aGc.SetBrushStyle(CGraphicsContext::ESolidBrush);

   145     		aGc.DrawRect(TRect(br-TPoint((width+blobWidth)/2,0),br-TPoint((width-blobWidth)/2,-blobWidth)));

   146 			aGc.SetBrushStyle(CGraphicsContext::ENullBrush);

   147 			}

   148 

   149 		if (!(iFlags&EFrameOverlayFlagBottomBlobsDimmed) && !(iFlags&EFrameOverlayFlagLeftBlobsDimmed))

   150 			aGc.SetBrushStyle(CGraphicsContext::ESolidBrush);

   151 		aGc.DrawRect(TRect(TPoint(tl.iX-blobWidth,br.iY),TPoint(tl.iX,br.iY+blobWidth)));

   152 		aGc.SetBrushStyle(CGraphicsContext::ENullBrush);

   153 

   154 		if (DrawLeftAndRight())

   155 			{

   156   			if (!(iFlags&EFrameOverlayFlagLeftBlobsDimmed))

   157 				aGc.SetBrushStyle(CGraphicsContext::ESolidBrush);

   158    			aGc.DrawRect(TRect(tl+TPoint(-blobWidth,(height-blobWidth)/2),tl+TPoint(0,(height+blobWidth)/2)));

   159 			aGc.SetBrushStyle(CGraphicsContext::ENullBrush);

   160 			}

   161 		}

   162 

   163 	aGc.SetDrawMode(CGraphicsContext::EDrawModePEN);

   164     }

   165 

   166 /** Gets the active region in which a pixel position is located.

   167 

   168 Note: Adjacent active regions overlap at the corners of the picture frame, so

   169 that a pixel position may be located within more than one active region.

   170 

   171 @param aPos A pixel position.

   172 @return The active area(s) within which the position specified is located. Zero

   173 if not located within any active area. For details, see the TEdges enumeration,

   174 described below. */

   175 EXPORT_C TInt TFrameOverlay::XyPosToEdges(const TPoint& aPos) const

   176     {

   177 	TInt visibleBlobWidth=VisibleBlobWidth();

   178 	TInt marginWidth=ActiveMarginWidth();

   179 	TInt edgesTouched=ENoEdges;

   180 	TRect frameOuterRect=iRect;

   181 	TRect frameInnerRect=iRect;

   182 	frameOuterRect.Grow(marginWidth,marginWidth);

   183 	frameInnerRect.Shrink(marginWidth,marginWidth);

   184 	if (iFlags&EFrameOverlayFlagBlobsInternal)

   185 		frameInnerRect.Shrink(visibleBlobWidth,visibleBlobWidth);

   186 	else

   187 		frameOuterRect.Grow(visibleBlobWidth,visibleBlobWidth);

   188 	TRect rightRect(TPoint(frameInnerRect.iBr.iX,frameOuterRect.iTl.iY),frameOuterRect.iBr);

   189 	TRect leftRect(frameOuterRect.iTl,TPoint(frameInnerRect.iTl.iX,frameOuterRect.iBr.iY));

   190 	if (rightRect.Contains(aPos))

   191 		edgesTouched|=EEdgeRight;

   192 	else if (leftRect.Contains(aPos))

   193 		edgesTouched|=EEdgeLeft;

   194 	TRect topRect(frameOuterRect.iTl,TPoint(frameOuterRect.iBr.iX,frameInnerRect.iTl.iY));

   195 	TRect bottomRect(TPoint(frameOuterRect.iTl.iX,frameInnerRect.iBr.iY),frameOuterRect.iBr);

   196 	if (topRect.Contains(aPos))

   197 		edgesTouched|=EEdgeTop;

   198 	else if (bottomRect.Contains(aPos))

   199 		edgesTouched|=EEdgeBottom;

   200 	return(edgesTouched);

   201     }

   202 

   203 

   204 TInt TFrameOverlay::VisibleBlobWidth()	const

   205 	{

   206 	if (iFlags&EFrameOverlayFlagBlobsInternal)

   207 		return Min(Min(iRect.Width(),iRect.Height())/3,(TInt) iVisibleBlobWidth);

   208 	else

   209 		return iVisibleBlobWidth;

   210 	}

   211 

   212 TInt TFrameOverlay::ActiveMarginWidth() const

   213 	{

   214 	TInt margin=(iActiveBlobWidth-VisibleBlobWidth())/2;

   215 	if (iFlags&EFrameOverlayFlagBlobsInternal)

   216 		return Min(Min(iRect.Width(),iRect.Height())/3-VisibleBlobWidth(),margin);

   217 	else

   218 		return Min(Min(iRect.Width(),iRect.Height())/3,margin);

   219 

   220 	}

   221 

   222 TBool TFrameOverlay::DrawLeftAndRight() const

   223 	{

   224 	if (iFlags&EFrameOverlayFlagBlobsInternal)

   225 		return (iRect.Height()>3*iVisibleBlobWidth);

   226 	else

   227 		return (iRect.Height()>iVisibleBlobWidth);

   228 	}

   229 

   230 TBool TFrameOverlay::DrawTopAndBottom() const

   231 	{

   232 	if (iFlags&EFrameOverlayFlagBlobsInternal)

   233 		return (iRect.Width()>3*iVisibleBlobWidth);

   234 	else

   235 		return (iRect.Width()>iVisibleBlobWidth);

   236 	}

   237 

   238 void TFrameOverlay::DrawDottedRectangle(CGraphicsContext& aGc,const TRect& aRect) const

   239 	{

   240 	TInt dashWidth=KBorderThicknessInPixels; 

   241 	TInt dashLength=KBorderThicknessInPixels;

   242 	TInt horizontalDashes=(aRect.Width()+dashLength-dashWidth)/(2*dashLength);

   243 	TInt verticalDashes=(aRect.Height()+dashLength-dashWidth)/(2*dashLength);

   244 	aGc.SetPenStyle(CGraphicsContext::ENullPen);

   245 	aGc.SetBrushStyle(CGraphicsContext::ESolidBrush);

   246 	TPoint move(2*dashLength,0);

   247 	TRect drawRect(aRect.iTl,TSize(dashLength,dashWidth));

   248 

   249 	{for (TInt ii=0;ii<horizontalDashes;ii++)

   250 		{

   251  		aGc.DrawRect(drawRect);

   252  		drawRect.Move(move);

   253 		}

   254 	}

   255 

   256 	move.SetXY(0,2*dashLength);

   257 	drawRect.SetRect(TPoint(aRect.iBr.iX-dashWidth,aRect.iTl.iY),TSize(dashWidth,dashLength));

   258 

   259 	{for (TInt ii=0;ii<verticalDashes;ii++)

   260 		{

   261  		aGc.DrawRect(drawRect);

   262  		drawRect.Move(move);

   263 		}

   264 	}

   265 

   266 	move.SetXY(-2*dashLength,0);

   267 	drawRect.SetRect(TPoint(aRect.iBr.iX-dashLength,aRect.iBr.iY-dashWidth),TSize(dashLength,dashWidth));

   268 

   269 	{for (TInt ii=0;ii<horizontalDashes;ii++)

   270 		{

   271  		aGc.DrawRect(drawRect);

   272  		drawRect.Move(move);

   273 		}

   274 	}

   275 

   276 	move.SetXY(0,-2*dashLength);

   277 	drawRect.SetRect(TPoint(aRect.iTl.iX,aRect.iBr.iY-dashLength),TSize(dashWidth,dashLength));

   278 

   279 	{for (TInt ii=0;ii<verticalDashes;ii++)

   280 		{

   281  		aGc.DrawRect(drawRect);

   282  		drawRect.Move(move);

   283 		}

   284 	}

   285 

   286 	}

   287 

   288 

   289
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