skia2/include/views/SkTouchGesture.h

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Automatic update of all copyright notices to reflect new license terms. I have manually examined all of these diffs and restored a few files that seem to require manual adjustment. The following files still need to be modified manually, in a separate CL: android_sample/SampleApp/AndroidManifest.xml android_sample/SampleApp/res/layout/layout.xml android_sample/SampleApp/res/menu/sample.xml android_sample/SampleApp/res/values/strings.xml android_sample/SampleApp/src/com/skia/sampleapp/SampleApp.java android_sample/SampleApp/src/com/skia/sampleapp/SampleView.java experimental/CiCarbonSampleMain.c experimental/CocoaDebugger/main.m experimental/FileReaderApp/main.m experimental/SimpleCocoaApp/main.m experimental/iOSSampleApp/Shared/SkAlertPrompt.h experimental/iOSSampleApp/Shared/SkAlertPrompt.m experimental/iOSSampleApp/SkiOSSampleApp-Base.xcconfig experimental/iOSSampleApp/SkiOSSampleApp-Debug.xcconfig experimental/iOSSampleApp/SkiOSSampleApp-Release.xcconfig gpu/src/android/GrGLDefaultInterface_android.cpp gyp/common.gypi gyp_skia include/ports/SkHarfBuzzFont.h include/views/SkOSWindow_wxwidgets.h make.bat make.py src/opts/memset.arm.S src/opts/memset16_neon.S src/opts/memset32_neon.S src/opts/opts_check_arm.cpp src/ports/SkDebug_brew.cpp src/ports/SkMemory_brew.cpp src/ports/SkOSFile_brew.cpp src/ports/SkXMLParser_empty.cpp src/utils/ios/SkImageDecoder_iOS.mm src/utils/ios/SkOSFile_iOS.mm src/utils/ios/SkStream_NSData.mm tests/FillPathTest.cpp Review URL: http://codereview.appspot.com/4816058 git-svn-id: http://skia.googlecode.com/svn/trunk@1982 2bbb7eff-a529-9590-31e7-b0007b416f81
2011-07-28 14:26:00 +00:00
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkTouchGesture_DEFINED
#define SkTouchGesture_DEFINED
#include "../private/SkTDArray.h"
#include "SkMatrix.h"
struct SkFlingState {
SkFlingState() : fActive(false) {}
bool isActive() const { return fActive; }
void stop() { fActive = false; }
void reset(float sx, float sy);
bool evaluateMatrix(SkMatrix* matrix);
private:
SkPoint fDirection;
SkScalar fSpeed0;
double fTime0;
bool fActive;
};
class SkTouchGesture {
public:
SkTouchGesture();
~SkTouchGesture();
void touchBegin(void* owner, float x, float y);
void touchMoved(void* owner, float x, float y);
void touchEnd(void* owner);
void reset();
bool isActive() { return fFlinger.isActive(); }
void stop() { fFlinger.stop(); }
const SkMatrix& localM();
const SkMatrix& globalM() const { return fGlobalM; }
void setTransLimit(const SkRect& contentRect, const SkRect& windowRect);
private:
enum State {
kEmpty_State,
kTranslate_State,
kZoom_State,
};
struct Rec {
void* fOwner;
float fStartX, fStartY;
float fPrevX, fPrevY;
float fLastX, fLastY;
float fPrevT, fLastT;
};
SkTDArray<Rec> fTouches;
State fState;
SkMatrix fLocalM, fGlobalM;
SkFlingState fFlinger;
double fLastUpMillis;
SkPoint fLastUpP;
// The following rects are used to limit the translation so the content never leaves the window
SkRect fContentRect, fWindowRect;
bool fIsTransLimited = false;
void limitTrans(); // here we only limit the translation with respect to globalM
void flushLocalM();
int findRec(void* owner) const;
void appendNewRec(void* owner, float x, float y);
float computePinch(const Rec&, const Rec&);
float limitTotalZoom(float scale) const;
bool handleDblTap(float, float);
};
#endif