More refactoring for Viewer

tools/viewer/Window.h

-/*
-* Copyright 2016 Google Inc.
-*
-* Use of this source code is governed by a BSD-style license that can be
-* found in the LICENSE file.
-*/
-
-#ifndef Window_DEFINED
-#define Window_DEFINED
-
-#include "SkTypes.h"
-#include "SkRect.h"
-
-class SkCanvas;
-class VulkanTestContext;
-
-namespace sk_app {
-
-class Window {
-public:
-    static Window* CreateNativeWindow(void* platformData);
-
-    virtual ~Window() {};
-
-    virtual void setTitle(const char*) = 0;
-    virtual void show() = 0;
-    virtual void inval() = 0;
-
-    virtual bool scaleContentToFit() const { return false; }
-    virtual bool supportsContentRect() const { return false; }
-    virtual SkRect getContentRect() { return SkRect::MakeEmpty(); }
-
-    enum BackEndType {
-        kNativeGL_BackendType,
-        kVulkan_BackendType
-    };
-
-    virtual bool attach(BackEndType attachType, int msaaSampleCount) = 0;
-    void detach();
-
-    // input handling
-    enum Key {
-        kNONE_Key,    //corresponds to android's UNKNOWN
-
-        kLeftSoftKey_Key,
-        kRightSoftKey_Key,
-
-        kHome_Key,    //!< the home key - added to match android
-        kBack_Key,    //!< (CLR)
-        kSend_Key,    //!< the green (talk) key
-        kEnd_Key,     //!< the red key
-
-        k0_Key,
-        k1_Key,
-        k2_Key,
-        k3_Key,
-        k4_Key,
-        k5_Key,
-        k6_Key,
-        k7_Key,
-        k8_Key,
-        k9_Key,
-        kStar_Key,    //!< the * key
-        kHash_Key,    //!< the # key
-
-        kUp_Key,
-        kDown_Key,
-        kLeft_Key,
-        kRight_Key,
-
-        kOK_Key,      //!< the center key
-
-        kVolUp_Key,   //!< volume up    - match android
-        kVolDown_Key, //!< volume down  - same
-        kPower_Key,   //!< power button - same
-        kCamera_Key,  //!< camera       - same
-
-        kLast_Key = kCamera_Key
-    };
-    static const int kKeyCount = kLast_Key + 1;
-
-    enum ModifierKeys {
-        kShift_ModifierKey = 1 << 0,
-        kControl_ModifierKey = 1 << 1,
-        kOption_ModifierKey = 1 << 2,   // same as ALT
-        kCommand_ModifierKey = 1 << 3,
-        kFirstPress_ModifierKey = 1 << 4,
-    };
-
-    enum InputState {
-        kDown_InputState,
-        kUp_InputState,
-        kMove_InputState   // only valid for mouse
-    };
-
-    // return value of 'true' means 'I have handled this event'
-    typedef bool(*OnCharFunc)(SkUnichar c, uint32_t modifiers, void* userData);
-    typedef bool(*OnKeyFunc)(Key key, InputState state, uint32_t modifiers, void* userData);
-    typedef bool(*OnMouseFunc)(int x, int y, InputState state, uint32_t modifiers, void* userData);
-    typedef void(*OnPaintFunc)(SkCanvas*, void* userData);
-
-    void registerCharFunc(OnCharFunc func, void* userData) {
-        fCharFunc = func;
-        fCharUserData = userData;
-    }
-
-    void registerKeyFunc(OnKeyFunc func, void* userData) {
-        fKeyFunc = func;
-        fKeyUserData = userData;
-    }
-
-    void registerMouseFunc(OnMouseFunc func, void* userData) {
-        fMouseFunc = func;
-        fMouseUserData = userData;
-    }
-
-    void registerPaintFunc(OnPaintFunc func, void* userData) {
-        fPaintFunc = func;
-        fPaintUserData = userData;
-    }
-
-    bool onChar(SkUnichar c, uint32_t modifiers);
-    bool onKey(Key key, InputState state, uint32_t modifiers);
-    bool onMouse(int x, int y, InputState state, uint32_t modifiers);
-    void onPaint();
-    void onResize(uint32_t width, uint32_t height);
-
-    uint32_t width() { return fWidth; }
-    uint32_t height() { return fHeight;  }
-
-protected:
-    Window();
-
-    uint32_t     fWidth;
-    uint32_t     fHeight;
-
-    OnCharFunc   fCharFunc;
-    void*        fCharUserData;
-    OnKeyFunc    fKeyFunc;
-    void*        fKeyUserData;
-    OnMouseFunc  fMouseFunc;
-    void*        fMouseUserData;
-    OnPaintFunc  fPaintFunc;
-    void*        fPaintUserData;
-
-    VulkanTestContext* fTestContext;
-};
-
-}   // namespace sk_app
-#endif