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1 /* |
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2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the License "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Gesture recognition utilities |
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15 * |
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16 */ |
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17 |
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18 |
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19 #include "utils.h" |
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20 |
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21 #include <coemain.h> // for CCoeEnv |
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22 #include <eikappui.h> // for CEikAppUi |
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23 |
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24 #include "gesturedefs.h" |
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25 |
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26 namespace RT_GestureHelper |
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27 { |
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28 /** @return the longer edge of the size */ |
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29 inline TInt LongerEdge( const TSize& aSize ) |
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30 { |
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31 return Max( aSize.iHeight, aSize.iWidth ); |
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32 } |
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33 |
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34 // for documentation, see header file |
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35 TRect ToleranceRect( const TPoint& aCenterPoint ) |
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36 { |
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37 /* |
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38 TSize screenSize = static_cast<CEikAppUi*>( CCoeEnv::Static()->AppUi() ) |
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39 ->ApplicationRect().Size(); |
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40 // multiplication has to be done first, to avoid rounding integer to 0 with division |
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41 int toleranceLength = ( KGestureTolerancePercent * LongerEdge( screenSize ) ) / 100; |
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42 */ |
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43 long toleranceLength = Mm2Pixels(KFingerSize_mm) / 2; |
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44 TRect toleranceRect( aCenterPoint, TSize() ); |
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45 // grow by the tolerance length, while keeping the center point |
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46 toleranceRect.Shrink( -toleranceLength, -toleranceLength ); |
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47 return toleranceRect; |
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48 } |
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49 |
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50 long Twips2Pixels(long twips) |
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51 { |
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52 CWsScreenDevice* screen = CCoeEnv::Static()->ScreenDevice(); |
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53 TZoomFactor deviceMap(screen); |
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54 deviceMap.SetZoomFactor(TZoomFactor::EZoomOneToOne); |
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55 long px = deviceMap.VerticalTwipsToPixels(twips); //assuming that vertical |
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56 return px; //the same as horizontal |
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57 |
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58 } |
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59 |
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60 long Mm2Pixels(long mm) |
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61 { |
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62 return Twips2Pixels(mm * KTwipsInMm); |
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63 } |
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64 |
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65 long Inches2Pixels(double inches) |
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66 { |
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67 return Twips2Pixels(inches * KTwipsInInch); |
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68 } |
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69 |
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70 |
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71 } // namespace GestureHelper |