diff options
Diffstat (limited to 'platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/TwoFingerGestureDetector.java')
| -rw-r--r-- | platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/TwoFingerGestureDetector.java | 356 |
1 files changed, 179 insertions, 177 deletions
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/TwoFingerGestureDetector.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/TwoFingerGestureDetector.java index 6be0b46d5b..71fb9aa168 100644 --- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/TwoFingerGestureDetector.java +++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/TwoFingerGestureDetector.java @@ -9,19 +9,19 @@ import android.view.ViewConfiguration; /** * @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 @@ -37,187 +37,189 @@ import android.view.ViewConfiguration; */ public abstract class TwoFingerGestureDetector extends BaseGestureDetector { - private final float mEdgeSlop; - - protected float mPrevFingerDiffX; - protected float mPrevFingerDiffY; - protected float mCurrFingerDiffX; - protected float mCurrFingerDiffY; - - private float mCurrLen; - private float mPrevLen; - - private PointF mFocus; - - public TwoFingerGestureDetector(Context context) { - super(context); - - ViewConfiguration config = ViewConfiguration.get(context); - mEdgeSlop = config.getScaledEdgeSlop(); + private final float edgeSlop; + + protected float prevFingerDiffX; + protected float prevFingerDiffY; + protected float currFingerDiffX; + protected float currFingerDiffY; + + private float currLen; + private float prevLen; + + private PointF focus; + + public TwoFingerGestureDetector(Context context) { + super(context); + + ViewConfiguration config = ViewConfiguration.get(context); + + // We divide edge slop by 2 to make rotation gesture happen more easily #6870 + edgeSlop = config.getScaledEdgeSlop() / 2; + } + + @Override + protected abstract void handleStartProgressEvent(int actionCode, + MotionEvent event); + + @Override + protected abstract void handleInProgressEvent(int actionCode, + MotionEvent event); + + protected void updateStateByEvent(MotionEvent curr) { + super.updateStateByEvent(curr); + + final MotionEvent prev = prevEvent; + + currLen = -1; + prevLen = -1; + + // Previous + final float px0 = prev.getX(0); + final float py0 = prev.getY(0); + final float px1 = prev.getX(1); + final float py1 = prev.getY(1); + final float pvx = px1 - px0; + final float pvy = py1 - py0; + prevFingerDiffX = pvx; + prevFingerDiffY = pvy; + + // Current + final float cx0 = curr.getX(0); + final float cy0 = curr.getY(0); + final float cx1 = curr.getX(1); + final float cy1 = curr.getY(1); + final float cvx = cx1 - cx0; + final float cvy = cy1 - cy0; + currFingerDiffX = cvx; + currFingerDiffY = cvy; + focus = determineFocalPoint(curr); + } + + /** + * Return the current distance between the two pointers forming the gesture + * in progress. + * + * @return Distance between pointers in pixels. + */ + public float getCurrentSpan() { + if (currLen == -1) { + final float cvx = currFingerDiffX; + final float cvy = currFingerDiffY; + currLen = (float) Math.sqrt(cvx * cvx + cvy * cvy); } - - @Override - protected abstract void handleStartProgressEvent(int actionCode, - MotionEvent event); - - @Override - protected abstract void handleInProgressEvent(int actionCode, - MotionEvent event); - - protected void updateStateByEvent(MotionEvent curr) { - super.updateStateByEvent(curr); - - final MotionEvent prev = mPrevEvent; - - mCurrLen = -1; - mPrevLen = -1; - - // Previous - final float px0 = prev.getX(0); - final float py0 = prev.getY(0); - final float px1 = prev.getX(1); - final float py1 = prev.getY(1); - final float pvx = px1 - px0; - final float pvy = py1 - py0; - mPrevFingerDiffX = pvx; - mPrevFingerDiffY = pvy; - - // Current - final float cx0 = curr.getX(0); - final float cy0 = curr.getY(0); - final float cx1 = curr.getX(1); - final float cy1 = curr.getY(1); - final float cvx = cx1 - cx0; - final float cvy = cy1 - cy0; - mCurrFingerDiffX = cvx; - mCurrFingerDiffY = cvy; - mFocus = determineFocalPoint(curr); + return currLen; + } + + /** + * Return the previous distance between the two pointers forming the gesture + * in progress. + * + * @return Previous distance between pointers in pixels. + */ + public float getPreviousSpan() { + if (prevLen == -1) { + final float pvx = prevFingerDiffX; + final float pvy = prevFingerDiffY; + prevLen = (float) Math.sqrt(pvx * pvx + pvy * pvy); } - - /** - * Return the current distance between the two pointers forming the gesture - * in progress. - * - * @return Distance between pointers in pixels. - */ - public float getCurrentSpan() { - if (mCurrLen == -1) { - final float cvx = mCurrFingerDiffX; - final float cvy = mCurrFingerDiffY; - mCurrLen = (float) Math.sqrt(cvx * cvx + cvy * cvy); - } - return mCurrLen; + return prevLen; + } + + /** + * MotionEvent has no getRawX(int) method; simulate it pending future API + * approval. + * + * @param event Motion Event + * @param pointerIndex Pointer Index + * @return Raw x value or 0 + */ + protected static float getRawX(MotionEvent event, int pointerIndex) { + float offset = event.getRawX() - event.getX(); + if (pointerIndex < event.getPointerCount()) { + return event.getX(pointerIndex) + offset; } - - /** - * Return the previous distance between the two pointers forming the gesture - * in progress. - * - * @return Previous distance between pointers in pixels. - */ - public float getPreviousSpan() { - if (mPrevLen == -1) { - final float pvx = mPrevFingerDiffX; - final float pvy = mPrevFingerDiffY; - mPrevLen = (float) Math.sqrt(pvx * pvx + pvy * pvy); - } - return mPrevLen; + return 0.0f; + } + + /** + * MotionEvent has no getRawY(int) method; simulate it pending future API + * approval. + * + * @param event Motion Event + * @param pointerIndex Pointer Index + * @return Raw y value or 0 + */ + protected static float getRawY(MotionEvent event, int pointerIndex) { + float offset = event.getRawY() - event.getY(); + if (pointerIndex < event.getPointerCount()) { + return event.getY(pointerIndex) + offset; } - - /** - * MotionEvent has no getRawX(int) method; simulate it pending future API - * approval. - * - * @param event Motion Event - * @param pointerIndex Pointer Index - * @return Raw x value or 0 - */ - protected static float getRawX(MotionEvent event, int pointerIndex) { - float offset = event.getRawX() - event.getX(); - if (pointerIndex < event.getPointerCount()) { - return event.getX(pointerIndex) + offset; - } - return 0.0f; + return 0.0f; + } + + /** + * Check if we have a sloppy gesture. Sloppy gestures can happen if the edge + * of the user's hand is touching the screen, for example. + * + * @param event Motion Event + * @return {@code true} if is sloppy gesture, {@code false} if not + */ + protected boolean isSloppyGesture(MotionEvent event) { + // As orientation can change, query the metrics in touch down + DisplayMetrics metrics = context.getResources().getDisplayMetrics(); + float rightSlopEdge = metrics.widthPixels - edgeSlop; + float bottomSlopEdge = metrics.heightPixels - edgeSlop; + + final float edgeSlop = this.edgeSlop; + + final float x0 = event.getRawX(); + final float y0 = event.getRawY(); + final float x1 = getRawX(event, 1); + final float y1 = getRawY(event, 1); + + boolean p0sloppy = x0 < edgeSlop || y0 < edgeSlop || x0 > rightSlopEdge + || y0 > bottomSlopEdge; + boolean p1sloppy = x1 < edgeSlop || y1 < edgeSlop || x1 > rightSlopEdge + || y1 > bottomSlopEdge; + + if (p0sloppy && p1sloppy) { + return true; + } else if (p0sloppy) { + return true; + } else if (p1sloppy) { + return true; } - - /** - * MotionEvent has no getRawY(int) method; simulate it pending future API - * approval. - * - * @param event Motion Event - * @param pointerIndex Pointer Index - * @return Raw y value or 0 - */ - protected static float getRawY(MotionEvent event, int pointerIndex) { - float offset = event.getRawY() - event.getY(); - if (pointerIndex < event.getPointerCount()) { - return event.getY(pointerIndex) + offset; - } - return 0.0f; + return false; + } + + /** + * Determine (multi)finger focal point (a.k.a. center point between all + * fingers) + * + * @param motionEvent Motion Event + * @return PointF focal point + */ + public static 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); } - /** - * Check if we have a sloppy gesture. Sloppy gestures can happen if the edge - * of the user's hand is touching the screen, for example. - * - * @param event Motion Event - * @return {@code true} if is sloppy gesture, {@code false} if not - */ - protected boolean isSloppyGesture(MotionEvent event) { - // As orientation can change, query the metrics in touch down - DisplayMetrics metrics = mContext.getResources().getDisplayMetrics(); - float mRightSlopEdge = metrics.widthPixels - mEdgeSlop; - float mBottomSlopEdge = metrics.heightPixels - mEdgeSlop; - - final float edgeSlop = mEdgeSlop; - - final float x0 = event.getRawX(); - final float y0 = event.getRawY(); - final float x1 = getRawX(event, 1); - final float y1 = getRawY(event, 1); - - boolean p0sloppy = x0 < edgeSlop || y0 < edgeSlop || x0 > mRightSlopEdge - || y0 > mBottomSlopEdge; - boolean p1sloppy = x1 < edgeSlop || y1 < edgeSlop || x1 > mRightSlopEdge - || y1 > mBottomSlopEdge; - - if (p0sloppy && p1sloppy) { - return true; - } else if (p0sloppy) { - return true; - } else if (p1sloppy) { - return true; - } - return false; - } + return new PointF(x / pCount, y / pCount); + } - /** - * Determine (multi)finger focal point (a.k.a. center point between all - * fingers) - * - * @param e Motion Event - * @return PointF focal point - */ - public static PointF determineFocalPoint(MotionEvent e) { - // Number of fingers on screen - final int pCount = e.getPointerCount(); - float x = 0.0f; - float y = 0.0f; - - for (int i = 0; i < pCount; i++) { - x += e.getX(i); - y += e.getY(i); - } - - return new PointF(x / pCount, y / pCount); - } + public float getFocusX() { + return focus.x; + } - public float getFocusX() { - return mFocus.x; - } - - public float getFocusY() { - return mFocus.y; - } + public float getFocusY() { + return focus.y; + } } |