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1 /* Copyright (c) 2014 Brad Greco <brad@bgreco.net>
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to
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5 * deal in the Software without restriction, including without limitation the
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6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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7 * sell copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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19 * IN THE SOFTWARE.
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20 */
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21
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22 package net.bgreco.gmapzoominvert;
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23
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24 import static de.robv.android.xposed.XposedHelpers.findAndHookMethod;
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25 import android.view.MotionEvent;
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26 import de.robv.android.xposed.IXposedHookLoadPackage;
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27 import de.robv.android.xposed.XC_MethodHook;
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28 import de.robv.android.xposed.callbacks.XC_LoadPackage.LoadPackageParam;
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29
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30 public class GMapZoomInvert implements IXposedHookLoadPackage {
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31
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32 private float lastTapX;
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33 private float lastTapY;
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34 private long lastTapTime = 0;
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35 private boolean doubleTap = false;
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36 private boolean zooming = false;
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37
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38 @Override
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39 public void handleLoadPackage(LoadPackageParam lpparam) throws Throwable {
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40 if(!lpparam.packageName.equals("com.google.android.apps.maps"))
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41 return;
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42
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43 findAndHookMethod("com.google.android.apps.gmm.map.legacy.internal.vector.VectorMapViewImpl", lpparam.classLoader, "onTouchEvent", MotionEvent.class, new XC_MethodHook() {
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44
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45 @Override
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46 protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
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47 MotionEvent e = (MotionEvent) param.args[0];
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48 int action = e.getAction();
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49 // Detect double taps
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50 if(action == MotionEvent.ACTION_DOWN) {
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51 // Do our best to mimic the Google Maps double tap detection logic
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52 if(e.getEventTime() < lastTapTime + 250) {
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53 if(e.getX() - lastTapX > -150 && e.getX() - lastTapX < 100 && e.getY() - lastTapY > -150 && e.getY() - lastTapY < 100) {
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54 doubleTap = true;
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55 }
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56 }
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57 lastTapTime = e.getEventTime();
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58 lastTapX = e.getX();
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59 lastTapY = e.getY();
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60 } else if(action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP) {
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61 // Also Invert the Y axis on release, otherwise the zoom will snap back
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62 if(zooming) {
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63 e.setLocation(e.getX(), lastTapY - (e.getY() - lastTapY));
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64 param.args[0] = e;
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65 }
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66 doubleTap = false;
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67 zooming = false;
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68 } else if(action == MotionEvent.ACTION_MOVE) {
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69 // Invert the Y axis of the zoom gesture
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70 if(e.getPointerCount() == 1) {
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71 if(doubleTap) {
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72 //Log.d("gmapzoominvert", "y offset: " + (lastTapY - e.getY()));
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73 e.setLocation(e.getX(), lastTapY - (e.getY() - lastTapY));
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74 param.args[0] = e;
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75 zooming = true;
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76 }
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77 } else {
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78 // Another finger pressed cancels the zoom gesture
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79 doubleTap = false;
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80 zooming = false;
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81 }
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82 }
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83 }
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84
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85 });
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86 }
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87
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88 }
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