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 | 224 |
1 files changed, 0 insertions, 224 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 deleted file mode 100644 index db492b6556..0000000000 --- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/almeros/android/multitouch/gesturedetectors/TwoFingerGestureDetector.java +++ /dev/null @@ -1,224 +0,0 @@ -package com.almeros.android.multitouch.gesturedetectors; - -import android.content.Context; -import android.graphics.PointF; -import android.util.DisplayMetrics; -import android.view.MotionEvent; -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 - * 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 abstract class TwoFingerGestureDetector extends BaseGestureDetector { - - 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); - - edgeSlop = config.getScaledEdgeSlop(); - } - - @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); - } - 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 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 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; - } - 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; - } - 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); - } - - return new PointF(x / pCount, y / pCount); - } - - public float getFocusX() { - return focus.x; - } - - public float getFocusY() { - return focus.y; - } - -}
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