diff options
Diffstat (limited to 'platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/CameraChangeDispatcher.java')
-rw-r--r-- | platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/CameraChangeDispatcher.java | 243 |
1 files changed, 149 insertions, 94 deletions
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/CameraChangeDispatcher.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/CameraChangeDispatcher.java index e558a5d707..a87a290fd7 100644 --- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/CameraChangeDispatcher.java +++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/CameraChangeDispatcher.java @@ -1,14 +1,19 @@ package com.mapbox.mapboxsdk.maps; import android.os.Handler; +import android.os.Message; +import android.support.annotation.IntDef; import android.support.annotation.NonNull; +import java.lang.annotation.Retention; +import java.lang.ref.WeakReference; import java.util.concurrent.CopyOnWriteArrayList; import static com.mapbox.mapboxsdk.maps.MapboxMap.OnCameraIdleListener; import static com.mapbox.mapboxsdk.maps.MapboxMap.OnCameraMoveCanceledListener; import static com.mapbox.mapboxsdk.maps.MapboxMap.OnCameraMoveListener; import static com.mapbox.mapboxsdk.maps.MapboxMap.OnCameraMoveStartedListener; +import static java.lang.annotation.RetentionPolicy.SOURCE; /** * Class responsible for dispatching camera change events to registered listeners. @@ -16,7 +21,7 @@ import static com.mapbox.mapboxsdk.maps.MapboxMap.OnCameraMoveStartedListener; class CameraChangeDispatcher implements MapboxMap.OnCameraMoveStartedListener, MapboxMap.OnCameraMoveListener, MapboxMap.OnCameraMoveCanceledListener, OnCameraIdleListener { - private final Handler handler = new Handler(); + private final CameraChangeHandler handler = new CameraChangeHandler(this); private boolean idle = true; private int moveStartedReason; @@ -31,83 +36,36 @@ class CameraChangeDispatcher implements MapboxMap.OnCameraMoveStartedListener, M private OnCameraMoveListener onCameraMoveListener; private OnCameraIdleListener onCameraIdleListener; - private final Runnable onCameraMoveStartedRunnable = new Runnable() { - @Override - public void run() { - if (!idle) { - return; - } - idle = false; - - // deprecated API - if (onCameraMoveStartedListener != null) { - onCameraMoveStartedListener.onCameraMoveStarted(moveStartedReason); - } - - // new API - if (!onCameraMoveStarted.isEmpty()) { - for (OnCameraMoveStartedListener cameraMoveStartedListener : onCameraMoveStarted) { - cameraMoveStartedListener.onCameraMoveStarted(moveStartedReason); - } - } - } - }; - - private final Runnable onCameraMoveRunnable = new Runnable() { - @Override - public void run() { - // deprecated API - if (onCameraMoveListener != null && !idle) { - onCameraMoveListener.onCameraMove(); - } - - // new API - if (!onCameraMove.isEmpty() && !idle) { - for (OnCameraMoveListener cameraMoveListener : onCameraMove) { - cameraMoveListener.onCameraMove(); - } - } - } - }; + @Retention(SOURCE) + @IntDef( {MOVE_STARTED, MOVE, MOVE_CANCELED, IDLE}) + @interface CameraChange { + } - private final Runnable onCameraMoveCancelRunnable = new Runnable() { - @Override - public void run() { - // deprecated API - if (onCameraMoveCanceledListener != null && !idle) { - onCameraMoveCanceledListener.onCameraMoveCanceled(); - } + private static final int MOVE_STARTED = 0; + private static final int MOVE = 1; + private static final int MOVE_CANCELED = 2; + private static final int IDLE = 3; - // new API - if (!onCameraMoveCanceled.isEmpty() && !idle) { - for (OnCameraMoveCanceledListener cameraMoveCanceledListener : onCameraMoveCanceled) { - cameraMoveCanceledListener.onCameraMoveCanceled(); - } - } - } - }; + @Override + public void onCameraMoveStarted(final int reason) { + moveStartedReason = reason; + handler.scheduleMessage(MOVE_STARTED); + } - private final Runnable onCameraIdleRunnable = new Runnable() { - @Override - public void run() { - if (idle) { - return; - } - idle = true; + @Override + public void onCameraMove() { + handler.scheduleMessage(MOVE); + } - // deprecated API - if (onCameraIdleListener != null) { - onCameraIdleListener.onCameraIdle(); - } + @Override + public void onCameraMoveCanceled() { + handler.scheduleMessage(MOVE_CANCELED); + } - // new API - if (!onCameraIdle.isEmpty()) { - for (OnCameraIdleListener cameraIdleListener : onCameraIdle) { - cameraIdleListener.onCameraIdle(); - } - } - } - }; + @Override + public void onCameraIdle() { + handler.scheduleMessage(IDLE); + } @Deprecated void setOnCameraMoveStartedListener(OnCameraMoveStartedListener onCameraMoveStartedListener) { @@ -129,27 +87,6 @@ class CameraChangeDispatcher implements MapboxMap.OnCameraMoveStartedListener, M this.onCameraIdleListener = onCameraIdleListener; } - @Override - public void onCameraMoveStarted(final int reason) { - moveStartedReason = reason; - handler.post(onCameraMoveStartedRunnable); - } - - @Override - public void onCameraMove() { - handler.post(onCameraMoveRunnable); - } - - @Override - public void onCameraMoveCanceled() { - handler.post(onCameraMoveCancelRunnable); - } - - @Override - public void onCameraIdle() { - handler.post(onCameraIdleRunnable); - } - void addOnCameraIdleListener(@NonNull OnCameraIdleListener listener) { onCameraIdle.add(listener); } @@ -189,4 +126,122 @@ class CameraChangeDispatcher implements MapboxMap.OnCameraMoveStartedListener, M onCameraMove.remove(listener); } } + + private void executeOnCameraMoveStarted() { + if (!idle) { + return; + } + idle = false; + + // deprecated API + if (onCameraMoveStartedListener != null) { + onCameraMoveStartedListener.onCameraMoveStarted(moveStartedReason); + } + + // new API + if (!onCameraMoveStarted.isEmpty()) { + for (OnCameraMoveStartedListener cameraMoveStartedListener : onCameraMoveStarted) { + cameraMoveStartedListener.onCameraMoveStarted(moveStartedReason); + } + } + } + + private void executeOnCameraMove() { + // deprecated API + if (onCameraMoveListener != null && !idle) { + onCameraMoveListener.onCameraMove(); + } + + // new API + if (!onCameraMove.isEmpty() && !idle) { + for (OnCameraMoveListener cameraMoveListener : onCameraMove) { + cameraMoveListener.onCameraMove(); + } + } + } + + private void executeOnCameraMoveCancelled() { + // deprecated API + if (onCameraMoveCanceledListener != null && !idle) { + onCameraMoveCanceledListener.onCameraMoveCanceled(); + } + + // new API + if (!onCameraMoveCanceled.isEmpty() && !idle) { + for (OnCameraMoveCanceledListener cameraMoveCanceledListener : onCameraMoveCanceled) { + cameraMoveCanceledListener.onCameraMoveCanceled(); + } + } + } + + private void executeOnCameraIdle() { + if (idle) { + return; + } + idle = true; + + // deprecated API + if (onCameraIdleListener != null) { + onCameraIdleListener.onCameraIdle(); + } + + // new API + if (!onCameraIdle.isEmpty()) { + for (OnCameraIdleListener cameraIdleListener : onCameraIdle) { + cameraIdleListener.onCameraIdle(); + } + } + } + + private static class CameraChangeHandler extends Handler { + + private WeakReference<CameraChangeDispatcher> dispatcherWeakReference; + + CameraChangeHandler(CameraChangeDispatcher dispatcher) { + super(); + this.dispatcherWeakReference = new WeakReference<>(dispatcher); + } + + @Override + public void handleMessage(Message msg) { + CameraChangeDispatcher dispatcher = dispatcherWeakReference.get(); + if (dispatcher != null) { + switch (msg.what) { + case MOVE_STARTED: + dispatcher.executeOnCameraMoveStarted(); + break; + case MOVE: + dispatcher.executeOnCameraMove(); + break; + case MOVE_CANCELED: + dispatcher.executeOnCameraMoveCancelled(); + break; + case IDLE: + dispatcher.executeOnCameraIdle(); + break; + } + } + } + + void scheduleMessage(@CameraChange int change) { + CameraChangeDispatcher dispatcher = dispatcherWeakReference.get(); + if (dispatcher != null) { + // if there is a movement that is cancelled/stopped and restarted in the same code block + // we can safely assume that the movement will continue, no need for dispatching unnecessary callbacks sequence + if (change == MOVE_STARTED) { + boolean shouldReturn = !dispatcher.idle && (hasMessages(IDLE) || hasMessages(MOVE_CANCELED)); + removeMessages(IDLE); + removeMessages(MOVE_CANCELED); + + if (shouldReturn) { + return; + } + } + + Message message = new Message(); + message.what = change; + this.sendMessage(message); + } + } + } } |