a1317a9de5
- rearchitect: now that MapView is a ViewGroup and MapRenderer is the GLSurfaceView. - lock/unlock proxy tiles properly to not be removed from cache while in use
501 lines
12 KiB
Java
501 lines
12 KiB
Java
/*
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* Copyright 2010, 2011, 2012 mapsforge.org
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*
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* This program is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.oscim.view;
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import org.oscim.core.Tile;
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import android.content.Context;
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import android.os.CountDownTimer;
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import android.os.SystemClock;
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import android.util.Log;
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import android.view.GestureDetector;
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import android.view.GestureDetector.SimpleOnGestureListener;
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import android.view.MotionEvent;
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import android.view.ScaleGestureDetector;
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import android.view.ViewConfiguration;
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import android.view.animation.DecelerateInterpolator;
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import android.widget.Scroller;
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/**
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* Implementation for multi-touch capable devices. TODO write a AnimationTimer instead of using CountDownTimer
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*/
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public class TouchHandler {
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private static final int INVALID_POINTER_ID = -1;
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/* package */final MapView mMapView;
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/* package */final MapViewPosition mMapPosition;
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/* package */final DecelerateInterpolator mInterpolator = new DecelerateInterpolator();
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/* package */boolean mBeginScale;
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/* package */float mSumScale;
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private final float mMapMoveDelta;
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private boolean mMoveStart;
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private boolean mBeginRotate;
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/* package */float mPosX;
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/* package */float mPosY;
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private double mAngle;
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private int mActivePointerId;
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private final ScaleGestureDetector mScaleGestureDetector;
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private final GestureDetector mGestureDetector;
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/**
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* @param context
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* the Context
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* @param mapView
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* the MapView
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*/
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public TouchHandler(Context context, MapView mapView) {
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ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
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mMapView = mapView;
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mMapPosition = mapView.getMapPosition();
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mMapMoveDelta = viewConfiguration.getScaledTouchSlop();
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mActivePointerId = INVALID_POINTER_ID;
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mScaleGestureDetector = new ScaleGestureDetector(context, new ScaleListener());
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mGestureDetector = new GestureDetector(context, new MapGestureDetector());
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}
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private static int getAction(MotionEvent motionEvent) {
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return motionEvent.getAction() & MotionEvent.ACTION_MASK;
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}
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private boolean onActionCancel() {
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mActivePointerId = INVALID_POINTER_ID;
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return true;
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}
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private boolean onActionDown(MotionEvent event) {
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mPosX = event.getX();
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mPosY = event.getY();
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mMoveStart = false;
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mBeginRotate = false;
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// save the ID of the pointer
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mActivePointerId = event.getPointerId(0);
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// Log.d("...", "set active pointer" + mActivePointerId);
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return true;
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}
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private boolean mScaling = false;
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private boolean onActionMove(MotionEvent event) {
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int pointerIndex = event.findPointerIndex(mActivePointerId);
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// calculate the distance between previous and current position
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float moveX = event.getX(pointerIndex) - mPosX;
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float moveY = event.getY(pointerIndex) - mPosY;
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boolean scaling = mScaleGestureDetector.isInProgress();
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if (!mScaling) {
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mScaling = scaling;
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}
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if (!scaling && !mMoveStart) {
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if (Math.abs(moveX) > 3 * mMapMoveDelta
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|| Math.abs(moveY) > 3 * mMapMoveDelta) {
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// the map movement threshold has been reached
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// longPressDetector.pressStop();
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mMoveStart = true;
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// save the position of the event
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mPosX = event.getX(pointerIndex);
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mPosY = event.getY(pointerIndex);
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}
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return true;
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}
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if (mMapView.enableRotation) {
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if (multi > 0) {
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double x1 = event.getX(0);
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double x2 = event.getX(1);
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double y1 = event.getY(0);
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double y2 = event.getY(1);
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double dx = x1 - x2;
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double dy = y1 - y2;
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double rad = Math.atan2(dy, dx);
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double r = rad - mAngle;
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// Log.d("...", "move " + x + " " + y + " " + cx + " " + cy);
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if (!mBeginRotate && !mBeginScale) {
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if (r > 0.02 || r < -0.02)
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mBeginRotate = true;
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} else if (mBeginRotate) {
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double rsin = Math.sin(r);
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double rcos = Math.cos(r);
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// focus point relative to center
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double cx = (mMapView.getWidth() >> 1) - (x1 + x2) / 2;
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double cy = (mMapView.getHeight() >> 1) - (y1 + y2) / 2;
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float x = (float) (cx * rcos + cy * -rsin - cx);
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float y = (float) (cx * rsin + cy * rcos - cy);
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mMapPosition.rotateMap((float) Math.toDegrees(rad - mAngle), x, y);
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mAngle = rad;
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mMapView.redrawMap();
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}
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}
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}
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// save the position of the event
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mPosX = event.getX(pointerIndex);
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mPosY = event.getY(pointerIndex);
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if (scaling) {
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return true;
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}
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mMapPosition.moveMap(moveX, moveY);
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mMapView.redrawMap();
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return true;
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}
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private int multi = 0;
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private boolean onActionPointerDown(MotionEvent event) {
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// longPressDetector.pressStop();
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// multiTouchDownTime = motionEvent.getEventTime();
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multi++;
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if (multi == 1) {
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double dx = event.getX(0) - event.getX(1);
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double dy = event.getY(0) - event.getY(1);
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mAngle = Math.atan2(dy, dx);
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}
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return true;
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}
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private boolean onActionPointerUp(MotionEvent motionEvent) {
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// extract the index of the pointer that left the touch sensor
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int masked = (motionEvent.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK);
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int pointerIndex = masked >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
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if (motionEvent.getPointerId(pointerIndex) == mActivePointerId) {
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// the active pointer has gone up, choose a new one
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if (pointerIndex == 0) {
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pointerIndex = 1;
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} else {
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pointerIndex = 0;
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}
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// save the position of the event
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mPosX = motionEvent.getX(pointerIndex);
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mPosY = motionEvent.getY(pointerIndex);
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mActivePointerId = motionEvent.getPointerId(pointerIndex);
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}
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multi--;
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return true;
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}
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/**
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* @param motionEvent
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* ...
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* @return ...
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*/
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private boolean onActionUp(MotionEvent motionEvent) {
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mActivePointerId = INVALID_POINTER_ID;
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mScaling = false;
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multi = 0;
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return true;
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}
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/**
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* @param event
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* ...
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* @return ...
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*/
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public boolean handleMotionEvent(MotionEvent event) {
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// workaround for a bug in the ScaleGestureDetector, see Android issue
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// #12976
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// if (event.getAction() != MotionEvent.ACTION_MOVE
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// || event.getPointerCount() > 1) {
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mScaleGestureDetector.onTouchEvent(event);
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// }
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if (!mScaling)
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mGestureDetector.onTouchEvent(event);
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int action = getAction(event);
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boolean ret = false;
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if (action == MotionEvent.ACTION_DOWN) {
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ret = onActionDown(event);
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} else if (action == MotionEvent.ACTION_MOVE) {
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ret = onActionMove(event);
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} else if (action == MotionEvent.ACTION_UP) {
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ret = onActionUp(event);
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} else if (action == MotionEvent.ACTION_CANCEL) {
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ret = onActionCancel();
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} else if (action == MotionEvent.ACTION_POINTER_DOWN) {
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return onActionPointerDown(event);
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} else if (action == MotionEvent.ACTION_POINTER_UP) {
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ret = onActionPointerUp(event);
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}
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return ret;
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}
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class MapGestureDetector extends SimpleOnGestureListener {
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private Scroller mScroller;
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private float mScrollX, mScrollY, mPrevScale;
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private CountDownTimer mTimer = null;
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private boolean fling = false;
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public MapGestureDetector() {
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mScroller = new Scroller(mMapView.getContext(),
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new android.view.animation.LinearInterpolator());
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}
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@Override
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public boolean onDown(MotionEvent e) {
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if (fling) {
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mScroller.forceFinished(true);
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if (mTimer != null) {
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mTimer.cancel();
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mTimer = null;
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}
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fling = false;
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}
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// Log.d("mapsforge", "onDown");
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return true;
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}
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boolean scroll() {
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if (mScroller.isFinished()) {
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return false;
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}
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mScroller.computeScrollOffset();
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float moveX = mScroller.getCurrX() - mScrollX;
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float moveY = mScroller.getCurrY() - mScrollY;
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if (moveX >= 1 || moveY >= 1 || moveX <= -1 || moveY <= -1) {
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mMapPosition.moveMap(moveX, moveY);
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mMapView.redrawMap();
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mScrollX = mScroller.getCurrX();
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mScrollY = mScroller.getCurrY();
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}
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return true;
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}
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@Override
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public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
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float velocityY) {
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int w = Tile.TILE_SIZE * 20;
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int h = Tile.TILE_SIZE * 20;
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mScrollX = 0;
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mScrollY = 0;
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if (mTimer != null) {
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mTimer.cancel();
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mTimer = null;
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}
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mScroller.fling(0, 0, Math.round(velocityX) / 2, Math.round(velocityY) / 2,
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-w, w, -h, h);
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// animate for two seconds
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mTimer = new CountDownTimer(1500, 50) {
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@Override
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public void onTick(long tick) {
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scroll();
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}
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@Override
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public void onFinish() {
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// do nothing
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}
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}.start();
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fling = true;
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return true;
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}
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@Override
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public void onLongPress(MotionEvent e) {
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if (MapView.testRegionZoom) {
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Log.d("mapsforge", "long press");
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mMapView.mRegionLookup.updateRegion(-1, null);
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}
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}
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private final float mScaleDuration = 300;
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boolean scale(long tick) {
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fling = true;
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if (mPrevScale >= 1)
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return false;
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float adv = (mScaleDuration - tick) / mScaleDuration;
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adv = mInterpolator.getInterpolation(adv);
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float scale = adv - mPrevScale;
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mPrevScale += scale;
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scale += 1;
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adv += 1;
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if (scale > 1) {
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mMapPosition.scaleMap(scale, mScrollX / adv, mScrollY / adv);
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mMapView.redrawMap();
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}
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return true;
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}
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@Override
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public boolean onDoubleTap(MotionEvent e) {
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if (MapView.testRegionZoom) {
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Log.d("mapsforge", "double tap");
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mMapView.mRegionLookup.updateRegion(1,
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mMapPosition.getOffsetPoint(mPosX, mPosY));
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} else {
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mScrollX = (e.getX(0) - (mMapView.getWidth() >> 1)) * 2f;
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mScrollY = (e.getY(0) - (mMapView.getHeight() >> 1)) * 2f;
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mPrevScale = 0;
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mTimer = new CountDownTimer((int) mScaleDuration, 30) {
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@Override
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public void onTick(long tick) {
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scale(tick);
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}
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@Override
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public void onFinish() {
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scale(0);
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}
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}.start();
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}
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return true;
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}
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}
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class ScaleListener implements ScaleGestureDetector.OnScaleGestureListener {
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private float mCenterX;
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private float mCenterY;
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private float mFocusX;
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private float mFocusY;
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private long mTimeStart;
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private long mTimeEnd;
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@Override
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public boolean onScale(ScaleGestureDetector gd) {
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float scale = gd.getScaleFactor();
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mFocusX = gd.getFocusX() - mCenterX;
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mFocusY = gd.getFocusY() - mCenterY;
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mSumScale *= scale;
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mTimeEnd = SystemClock.elapsedRealtime();
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if (!mBeginScale) {
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if (mTimeEnd - mTimeStart > 150 || mSumScale > 1.1 || mSumScale < 0.9) {
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mBeginScale = true;
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scale = mSumScale;
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}
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else
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return true;
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}
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mMapPosition.scaleMap(scale, mFocusX, mFocusY);
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mMapView.redrawMap();
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return true;
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}
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@Override
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public boolean onScaleBegin(ScaleGestureDetector gd) {
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mTimeEnd = mTimeStart = SystemClock.elapsedRealtime();
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mSumScale = 1;
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mBeginScale = false;
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mCenterX = mMapView.getWidth() >> 1;
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mCenterY = mMapView.getHeight() >> 1;
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if (mTimer != null) {
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mTimer.cancel();
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mTimer = null;
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}
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return true;
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}
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@Override
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public void onScaleEnd(ScaleGestureDetector gd) {
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// Log.d("ScaleListener", "Sum " + mSumScale + " " + (mTimeEnd - mTimeStart));
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if (mTimer == null && mTimeEnd - mTimeStart < 150
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&& (mSumScale < 0.99 || mSumScale > 1.01)) {
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mPrevScale = 0;
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mZooutOut = mSumScale < 0.99;
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mTimer = new CountDownTimer((int) mScaleDuration, 30) {
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@Override
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public void onTick(long tick) {
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scale(tick);
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}
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@Override
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public void onFinish() {
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scale(0);
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}
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}.start();
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}
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mBeginScale = false;
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}
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private float mPrevScale;
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private CountDownTimer mTimer;
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boolean mZooutOut;
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private final float mScaleDuration = 350;
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boolean scale(long tick) {
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if (mPrevScale >= 1) {
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mTimer = null;
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return false;
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}
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float adv = (mScaleDuration - tick) / mScaleDuration;
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adv = mInterpolator.getInterpolation(adv);
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float scale = adv - mPrevScale;
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mPrevScale += scale;
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if (mZooutOut) {
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mMapPosition.scaleMap(1 - scale, 0, 0);
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} else {
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mMapPosition.scaleMap(1 + scale, mFocusX, mFocusY);
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}
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mMapView.redrawMap();
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if (tick == 0)
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mTimer = null;
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return true;
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}
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}
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}
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