1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #ifndef SampleCode_DEFINED 11 #define SampleCode_DEFINED 12 13 #include "SkColor.h" 14 #include "SkEvent.h" 15 #include "SkKey.h" 16 #include "SkView.h" 17 class SkOSMenu; 18 class GrContext; 19 20 class SampleCode { 21 public: 22 static bool KeyQ(const SkEvent&, SkKey* outKey); 23 static bool CharQ(const SkEvent&, SkUnichar* outUni); 24 25 static bool TitleQ(const SkEvent&); 26 static void TitleR(SkEvent*, const char title[]); 27 static bool RequestTitle(SkView* view, SkString* title); 28 29 static bool PrefSizeQ(const SkEvent&); 30 static void PrefSizeR(SkEvent*, SkScalar width, SkScalar height); 31 32 static bool FastTextQ(const SkEvent&); 33 34 static SkMSec GetAnimTime(); 35 static SkMSec GetAnimTimeDelta(); 36 static SkScalar GetAnimSecondsDelta(); 37 static SkScalar GetAnimScalar(SkScalar speedPerSec, SkScalar period = 0); 38 39 static GrContext* GetGr(); 40 }; 41 42 ////////////////////////////////////////////////////////////////////////////// 43 44 // interface that constructs SkViews 45 class SkViewFactory : public SkRefCnt { 46 public: 47 virtual SkView* operator() () const = 0; 48 }; 49 50 typedef SkView* (*SkViewCreateFunc)(); 51 52 // wraps SkViewCreateFunc in SkViewFactory interface 53 class SkFuncViewFactory : public SkViewFactory { 54 public: 55 SkFuncViewFactory(SkViewCreateFunc func); 56 virtual SkView* operator() () const SK_OVERRIDE; 57 58 private: 59 SkViewCreateFunc fCreateFunc; 60 }; 61 62 namespace skiagm { 63 class GM; 64 } 65 66 // factory function that creates a skiagm::GM 67 typedef skiagm::GM* (*GMFactoryFunc)(void*); 68 69 // Takes a GM factory function and implements the SkViewFactory interface 70 // by making the GM and wrapping it in a GMSampleView. GMSampleView bridges 71 // the SampleView interface to skiagm::GM. 72 class SkGMSampleViewFactory : public SkViewFactory { 73 public: 74 SkGMSampleViewFactory(GMFactoryFunc func); 75 virtual SkView* operator() () const SK_OVERRIDE; 76 private: 77 GMFactoryFunc fFunc; 78 }; 79 80 class SkViewRegister : public SkRefCnt { 81 public: 82 explicit SkViewRegister(SkViewFactory*); 83 explicit SkViewRegister(SkViewCreateFunc); 84 explicit SkViewRegister(GMFactoryFunc); 85 ~SkViewRegister()86 ~SkViewRegister() { 87 fFact->unref(); 88 } 89 Head()90 static const SkViewRegister* Head() { return gHead; } 91 next()92 SkViewRegister* next() const { return fChain; } factory()93 const SkViewFactory* factory() const { return fFact; } 94 95 private: 96 SkViewFactory* fFact; 97 SkViewRegister* fChain; 98 99 static SkViewRegister* gHead; 100 }; 101 102 /////////////////////////////////////////////////////////////////////////////// 103 104 class SampleView : public SkView { 105 public: SampleView()106 SampleView() : fBGColor(SK_ColorWHITE), fRepeatCount(1) { 107 fUsePipe = false; 108 } 109 setBGColor(SkColor color)110 void setBGColor(SkColor color) { fBGColor = color; } 111 112 static bool IsSampleView(SkView*); 113 static bool SetRepeatDraw(SkView*, int count); 114 static bool SetUsePipe(SkView*, bool); 115 116 /** 117 * Call this to request menu items from a SampleView. 118 * Subclassing notes: A subclass of SampleView can overwrite this method 119 * to add new items of various types to the menu and change its title. 120 * The events attached to any new menu items must be handled in its onEvent 121 * method. See SkOSMenu.h for helper functions. 122 */ requestMenu(SkOSMenu * menu)123 virtual void requestMenu(SkOSMenu* menu) {} 124 125 protected: 126 virtual void onDrawBackground(SkCanvas*); 127 virtual void onDrawContent(SkCanvas*) = 0; 128 129 // overrides 130 virtual bool onEvent(const SkEvent& evt); 131 virtual bool onQuery(SkEvent* evt); 132 virtual void draw(SkCanvas*); 133 virtual void onDraw(SkCanvas*); 134 135 bool fUsePipe; 136 SkColor fBGColor; 137 138 private: 139 int fRepeatCount; 140 141 typedef SkView INHERITED; 142 }; 143 144 #endif 145 146