diff options
Diffstat (limited to 'platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/ShoveGestureDetector.java')
| -rw-r--r-- | platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/ShoveGestureDetector.java | 317 |
1 files changed, 159 insertions, 158 deletions
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/ShoveGestureDetector.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/ShoveGestureDetector.java index 254597105b..9396578e48 100644 --- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/ShoveGestureDetector.java +++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/ShoveGestureDetector.java @@ -5,21 +5,21 @@ import android.view.MotionEvent; /** * @author Robert Nordan (robert.nordan@norkart.no) - * + * <p> * Copyright (c) 2013, Norkart AS - * + * <p> * All rights reserved. - * + * <p> * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: - * + * <p> * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. - * + * <p> * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR @@ -35,179 +35,180 @@ import android.view.MotionEvent; */ public class ShoveGestureDetector extends TwoFingerGestureDetector { - /** - * Listener which must be implemented which is used by ShoveGestureDetector - * to perform callbacks to any implementing class which is registered to a - * ShoveGestureDetector via the constructor. - * - * @see ShoveGestureDetector.SimpleOnShoveGestureListener - */ - public interface OnShoveGestureListener { - public boolean onShove(ShoveGestureDetector detector); + /** + * Listener which must be implemented which is used by ShoveGestureDetector + * to perform callbacks to any implementing class which is registered to a + * ShoveGestureDetector via the constructor. + * + * @see ShoveGestureDetector.SimpleOnShoveGestureListener + */ + public interface OnShoveGestureListener { + public boolean onShove(ShoveGestureDetector detector); + + public boolean onShoveBegin(ShoveGestureDetector detector); + + public void onShoveEnd(ShoveGestureDetector detector); + } + + /** + * Helper class which may be extended and where the methods may be + * implemented. This way it is not necessary to implement all methods of + * OnShoveGestureListener. + */ + public static class SimpleOnShoveGestureListener implements + OnShoveGestureListener { + public boolean onShove(ShoveGestureDetector detector) { + return false; + } - public boolean onShoveBegin(ShoveGestureDetector detector); + public boolean onShoveBegin(ShoveGestureDetector detector) { + return true; + } - public void onShoveEnd(ShoveGestureDetector detector); + public void onShoveEnd(ShoveGestureDetector detector) { + // Do nothing, overridden implementation may be used } + } + + private float prevAverageY; + private float currAverageY; + + private final OnShoveGestureListener listener; + private boolean sloppyGesture; + + public ShoveGestureDetector(Context context, OnShoveGestureListener listener) { + super(context); + this.listener = listener; + } - /** - * Helper class which may be extended and where the methods may be - * implemented. This way it is not necessary to implement all methods of - * OnShoveGestureListener. - */ - public static class SimpleOnShoveGestureListener implements - OnShoveGestureListener { - public boolean onShove(ShoveGestureDetector detector) { - return false; + @Override + protected void handleStartProgressEvent(int actionCode, MotionEvent event) { + switch (actionCode) { + case MotionEvent.ACTION_POINTER_DOWN: + // At least the second finger is on screen now + + resetState(); // In case we missed an UP/CANCEL event + prevEvent = MotionEvent.obtain(event); + timeDelta = 0; + + updateStateByEvent(event); + + // See if we have a sloppy gesture + sloppyGesture = isSloppyGesture(event); + if (!sloppyGesture) { + // No, start gesture now + gestureInProgress = listener.onShoveBegin(this); } + break; - public boolean onShoveBegin(ShoveGestureDetector detector) { - return true; + case MotionEvent.ACTION_MOVE: + if (!sloppyGesture) { + break; } - public void onShoveEnd(ShoveGestureDetector detector) { - // Do nothing, overridden implementation may be used + // See if we still have a sloppy gesture + sloppyGesture = isSloppyGesture(event); + if (!sloppyGesture) { + // No, start normal gesture now + gestureInProgress = listener.onShoveBegin(this); } - } - private float mPrevAverageY; - private float mCurrAverageY; + break; - private final OnShoveGestureListener mListener; - private boolean mSloppyGesture; + case MotionEvent.ACTION_POINTER_UP: + if (!sloppyGesture) { + break; + } - public ShoveGestureDetector(Context context, OnShoveGestureListener listener) { - super(context); - mListener = listener; + break; } + } - @Override - protected void handleStartProgressEvent(int actionCode, MotionEvent event) { - switch (actionCode) { - case MotionEvent.ACTION_POINTER_DOWN: - // At least the second finger is on screen now - - resetState(); // In case we missed an UP/CANCEL event - mPrevEvent = MotionEvent.obtain(event); - mTimeDelta = 0; - - updateStateByEvent(event); - - // See if we have a sloppy gesture - mSloppyGesture = isSloppyGesture(event); - if (!mSloppyGesture) { - // No, start gesture now - mGestureInProgress = mListener.onShoveBegin(this); - } - break; - - case MotionEvent.ACTION_MOVE: - if (!mSloppyGesture) { - break; - } - - // See if we still have a sloppy gesture - mSloppyGesture = isSloppyGesture(event); - if (!mSloppyGesture) { - // No, start normal gesture now - mGestureInProgress = mListener.onShoveBegin(this); - } - - break; - - case MotionEvent.ACTION_POINTER_UP: - if (!mSloppyGesture) { - break; - } - - break; - } - } + @Override + protected void handleInProgressEvent(int actionCode, MotionEvent event) { + switch (actionCode) { + case MotionEvent.ACTION_POINTER_UP: + // Gesture ended but + updateStateByEvent(event); - @Override - protected void handleInProgressEvent(int actionCode, MotionEvent event) { - switch (actionCode) { - case MotionEvent.ACTION_POINTER_UP: - // Gesture ended but - updateStateByEvent(event); - - if (!mSloppyGesture) { - mListener.onShoveEnd(this); - } - - resetState(); - break; - - case MotionEvent.ACTION_CANCEL: - if (!mSloppyGesture) { - mListener.onShoveEnd(this); - } - - resetState(); - break; - - case MotionEvent.ACTION_MOVE: - updateStateByEvent(event); - - // Only accept the event if our relative pressure is within - // a certain limit. This can help filter shaky data as a - // finger is lifted. Also check that shove is meaningful. - if (mCurrPressure / mPrevPressure > PRESSURE_THRESHOLD - && Math.abs(getShovePixelsDelta()) > 0.5f) { - final boolean updatePrevious = mListener.onShove(this); - if (updatePrevious) { - mPrevEvent.recycle(); - mPrevEvent = MotionEvent.obtain(event); - } - } - break; + if (!sloppyGesture) { + listener.onShoveEnd(this); } - } - - @Override - protected void resetState() { - super.resetState(); - mSloppyGesture = false; - mPrevAverageY = 0.0f; - mCurrAverageY = 0.0f; - } - @Override - protected void updateStateByEvent(MotionEvent curr) { - super.updateStateByEvent(curr); + resetState(); + break; - final MotionEvent prev = mPrevEvent; - float py0 = prev.getY(0); - float py1 = prev.getY(1); - mPrevAverageY = (py0 + py1) / 2.0f; + case MotionEvent.ACTION_CANCEL: + if (!sloppyGesture) { + listener.onShoveEnd(this); + } - float cy0 = curr.getY(0); - float cy1 = curr.getY(1); - mCurrAverageY = (cy0 + cy1) / 2.0f; + resetState(); + break; + + case MotionEvent.ACTION_MOVE: + updateStateByEvent(event); + + // Only accept the event if our relative pressure is within + // a certain limit. This can help filter shaky data as a + // finger is lifted. Also check that shove is meaningful. + if (currPressure / prevPressure > PRESSURE_THRESHOLD + && Math.abs(getShovePixelsDelta()) > 0.5f) { + final boolean updatePrevious = listener.onShove(this); + if (updatePrevious) { + prevEvent.recycle(); + prevEvent = MotionEvent.obtain(event); + } + } + break; } - - @Override - protected boolean isSloppyGesture(MotionEvent event) { - boolean sloppy = super.isSloppyGesture(event); - if (sloppy) - return true; - - // If it's not traditionally sloppy, we check if the angle between - // fingers - // is acceptable. - double angle = Math.abs(Math.atan2(mCurrFingerDiffY, mCurrFingerDiffX)); - // about 20 degrees, left or right - return !((0.0f < angle && angle < 0.35f) || 2.79f < angle - && angle < Math.PI); + } + + @Override + protected void resetState() { + super.resetState(); + sloppyGesture = false; + prevAverageY = 0.0f; + currAverageY = 0.0f; + } + + @Override + protected void updateStateByEvent(MotionEvent curr) { + super.updateStateByEvent(curr); + + final MotionEvent prev = prevEvent; + float py0 = prev.getY(0); + float py1 = prev.getY(1); + prevAverageY = (py0 + py1) / 2.0f; + + float cy0 = curr.getY(0); + float cy1 = curr.getY(1); + currAverageY = (cy0 + cy1) / 2.0f; + } + + @Override + protected boolean isSloppyGesture(MotionEvent event) { + boolean sloppy = super.isSloppyGesture(event); + if (sloppy) { + return true; } - /** - * Return the distance in pixels from the previous shove event to the - * current event. - * - * @return The current distance in pixels. - */ - public float getShovePixelsDelta() { - return mCurrAverageY - mPrevAverageY; - } + // If it's not traditionally sloppy, we check if the angle between + // fingers + // is acceptable. + double angle = Math.abs(Math.atan2(currFingerDiffY, currFingerDiffX)); + // about 20 degrees, left or right + return !((0.0f < angle && angle < 0.35f) || 2.79f < angle + && angle < Math.PI); + } + + /** + * Return the distance in pixels from the previous shove event to the + * current event. + * + * @return The current distance in pixels. + */ + public float getShovePixelsDelta() { + return currAverageY - prevAverageY; + } } |