diff options
Diffstat (limited to 'platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/MoveGestureDetector.java')
-rw-r--r-- | platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/MoveGestureDetector.java | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/MoveGestureDetector.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/MoveGestureDetector.java deleted file mode 100644 index bc7dda6159..0000000000 --- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/MoveGestureDetector.java +++ /dev/null @@ -1,185 +0,0 @@ -package com.almeros.android.multitouch.gesturedetectors; - -import android.content.Context; -import android.graphics.PointF; -import android.view.MotionEvent; - -/** - * @author Almer Thie (code.almeros.com) Copyright (c) 2013, Almer Thie - * (code.almeros.com) - * <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 - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY - * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ -public class MoveGestureDetector extends BaseGestureDetector { - - /** - * Listener which must be implemented which is used by MoveGestureDetector - * to perform callbacks to any implementing class which is registered to a - * MoveGestureDetector via the constructor. - * - * @see MoveGestureDetector.SimpleOnMoveGestureListener - */ - public interface OnMoveGestureListener { - public boolean onMove(MoveGestureDetector detector); - - public boolean onMoveBegin(MoveGestureDetector detector); - - public void onMoveEnd(MoveGestureDetector 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 - * OnMoveGestureListener. - */ - public static class SimpleOnMoveGestureListener implements - OnMoveGestureListener { - public boolean onMove(MoveGestureDetector detector) { - return false; - } - - public boolean onMoveBegin(MoveGestureDetector detector) { - return true; - } - - public void onMoveEnd(MoveGestureDetector detector) { - // Do nothing, overridden implementation may be used - } - } - - private static final PointF FOCUS_DELTA_ZERO = new PointF(); - - private final OnMoveGestureListener listener; - - private PointF focusExternal = new PointF(); - private PointF focusDeltaExternal = new PointF(); - - public MoveGestureDetector(Context context, OnMoveGestureListener listener) { - super(context); - this.listener = listener; - } - - @Override - protected void handleStartProgressEvent(int actionCode, MotionEvent event) { - switch (actionCode) { - case MotionEvent.ACTION_DOWN: - resetState(); // In case we missed an UP/CANCEL event - - prevEvent = MotionEvent.obtain(event); - timeDelta = 0; - - updateStateByEvent(event); - break; - - case MotionEvent.ACTION_MOVE: - gestureInProgress = listener.onMoveBegin(this); - break; - } - } - - @Override - protected void handleInProgressEvent(int actionCode, MotionEvent event) { - switch (actionCode) { - case MotionEvent.ACTION_UP: - case MotionEvent.ACTION_CANCEL: - listener.onMoveEnd(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. - if (currPressure / prevPressure > PRESSURE_THRESHOLD) { - final boolean updatePrevious = listener.onMove(this); - if (updatePrevious) { - prevEvent.recycle(); - prevEvent = MotionEvent.obtain(event); - } - } - break; - } - } - - protected void updateStateByEvent(MotionEvent curr) { - super.updateStateByEvent(curr); - - final MotionEvent prev = prevEvent; - - // Focus intenal - PointF currFocusInternal = determineFocalPoint(curr); - PointF prevFocusInternal = determineFocalPoint(prev); - - // Focus external - // - Prevent skipping of focus delta when a finger is added or removed - boolean skipNextMoveEvent = prev.getPointerCount() != curr - .getPointerCount(); - focusDeltaExternal = skipNextMoveEvent ? FOCUS_DELTA_ZERO - : new PointF(currFocusInternal.x - prevFocusInternal.x, - currFocusInternal.y - prevFocusInternal.y); - - // - Don't directly use mFocusInternal (or skipping will occur). Add - // unskipped delta values to focusExternal instead. - focusExternal.x += focusDeltaExternal.x; - focusExternal.y += focusDeltaExternal.y; - } - - /** - * Determine (multi)finger focal point (a.k.a. center point between all - * fingers) - * - * @param motionEvent a {@link MotionEvent} object. - * @return PointF focal point - */ - private PointF determineFocalPoint(MotionEvent motionEvent) { - // Number of fingers on screen - final int pCount = motionEvent.getPointerCount(); - float x = 0.0f; - float y = 0.0f; - - for (int i = 0; i < pCount; i++) { - x += motionEvent.getX(i); - y += motionEvent.getY(i); - } - - return new PointF(x / pCount, y / pCount); - } - - public float getFocusX() { - return focusExternal.x; - } - - public float getFocusY() { - return focusExternal.y; - } - - public PointF getFocusDelta() { - return focusDeltaExternal; - } - -} |