151 lines
3.7 KiB
Java
151 lines
3.7 KiB
Java
/*
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* Copyright 2013 Hannes Janetzek
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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.layers.overlay;
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import org.oscim.core.MapPosition;
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import org.oscim.renderer.overlays.ExtrusionOverlay;
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import org.oscim.view.MapView;
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import android.os.CountDownTimer;
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import android.util.Log;
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import android.view.MotionEvent;
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/**
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* @author Hannes Janetzek
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*/
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public class BuildingOverlay extends Overlay {
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private final static String TAG = BuildingOverlay.class.getName();
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final ExtrusionOverlay mExtLayer;
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public BuildingOverlay(MapView mapView, org.oscim.layers.tile.TileRenderLayer tileRenderLayer) {
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super(mapView);
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mExtLayer = new ExtrusionOverlay(mapView, tileRenderLayer);
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mLayer = mExtLayer;
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}
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private int multi;
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private final float mFadeTime = 300;
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private float mAlpha = 1;
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private final static int MIN_ZOOM = 17;
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@Override
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public boolean onTouchEvent(MotionEvent e) {
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int action = e.getAction() & MotionEvent.ACTION_MASK;
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if (action == MotionEvent.ACTION_POINTER_DOWN) {
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multi++;
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} else if (action == MotionEvent.ACTION_POINTER_UP) {
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multi--;
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if (!mActive && mAlpha > 0) {
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// finish hiding
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//Log.d(TAG, "add multi hide timer " + mAlpha);
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addShowTimer(mFadeTime * mAlpha, false);
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}
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} else if (action == MotionEvent.ACTION_CANCEL) {
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multi = 0;
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Log.d(TAG, "cancel " + multi);
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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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}
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return false;
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}
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private boolean mActive = false;
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@Override
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public void onUpdate(MapPosition mapPosition, boolean changed) {
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boolean show = mapPosition.scale >= (1 << MIN_ZOOM);
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if (show && mActive)
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return;
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if (show) {
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// start showing
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//Log.d(TAG, "add show timer " + mAlpha);
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addShowTimer(mFadeTime * (1 - mAlpha), true);
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} else if (mActive) {
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// indicate hiding
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if (multi > 0) {
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//Log.d(TAG, "add fade timer " + mAlpha);
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addFadeTimer(mFadeTime * mAlpha, false);
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} else {
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//Log.d(TAG, "add hide timer " + mAlpha);
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addShowTimer(mFadeTime * mAlpha, false);
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}
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}
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mActive = show;
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}
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void fade(float duration, long tick, boolean dir, float max) {
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float a;
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if (dir)
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a = (1 - max) + (1 - (tick / duration)) * max;
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else
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a = (1 - max) + (tick / duration) * max;
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//Log.d(TAG, "fade " + dir + " " + tick + "\t" + a);
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mAlpha = a;
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mExtLayer.setAlpha(a);
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mMapView.render();
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}
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/* package */CountDownTimer mTimer;
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private void addFadeTimer(final float ms, final boolean dir) {
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if (mTimer != null)
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mTimer.cancel();
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mTimer = new CountDownTimer((long) ms, 16) {
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@Override
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public void onTick(long tick) {
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fade(ms, tick, dir, 0.2f);
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}
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@Override
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public void onFinish() {
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fade(ms, 0, dir, 0.2f);
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mTimer = null;
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}
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}.start();
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}
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private void addShowTimer(final float ms, final boolean dir) {
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final float d = mFadeTime;
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if (mTimer != null)
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mTimer.cancel();
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mTimer = new CountDownTimer((long) ms, 16) {
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@Override
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public void onTick(long tick) {
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fade(d, tick, dir, 1);
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}
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@Override
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public void onFinish() {
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fade(d, 0, dir, 1);
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mTimer = null;
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}
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}.start();
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}
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}
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