platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/CameraChangeDispatcher.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143

package com.mapbox.mapboxsdk.maps;

import android.support.annotation.NonNull;

import java.util.ArrayList;
import java.util.List;

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;

class CameraChangeDispatcher implements MapboxMap.OnCameraMoveStartedListener, MapboxMap.OnCameraMoveListener,
  MapboxMap.OnCameraMoveCanceledListener, OnCameraIdleListener {

  private boolean idle = true;

  private final List<OnCameraMoveStartedListener> onCameraMoveStartedListenerList = new ArrayList<>();
  private final List<OnCameraMoveCanceledListener> onCameraMoveCanceledListenerList = new ArrayList<>();
  private final List<OnCameraMoveListener> onCameraMoveListenerList = new ArrayList<>();
  private final List<OnCameraIdleListener> onCameraIdleListenerList = new ArrayList<>();

  private OnCameraMoveStartedListener onCameraMoveStartedListener;
  private OnCameraMoveCanceledListener onCameraMoveCanceledListener;
  private OnCameraMoveListener onCameraMoveListener;
  private OnCameraIdleListener onCameraIdleListener;

  void setOnCameraMoveStartedListener(OnCameraMoveStartedListener onCameraMoveStartedListener) {
    this.onCameraMoveStartedListener = onCameraMoveStartedListener;
  }

  void setOnCameraMoveCanceledListener(OnCameraMoveCanceledListener onCameraMoveCanceledListener) {
    this.onCameraMoveCanceledListener = onCameraMoveCanceledListener;
  }

  void setOnCameraMoveListener(OnCameraMoveListener onCameraMoveListener) {
    this.onCameraMoveListener = onCameraMoveListener;
  }

  void setOnCameraIdleListener(OnCameraIdleListener onCameraIdleListener) {
    this.onCameraIdleListener = onCameraIdleListener;
  }

  @Override
  public void onCameraMoveStarted(int reason) {
    if (!idle) {
      return;
    }

    idle = false;
    if (onCameraMoveStartedListener != null) {
      onCameraMoveStartedListener.onCameraMoveStarted(reason);
    }

    if (!onCameraMoveStartedListenerList.isEmpty()) {
      for (OnCameraMoveStartedListener cameraMoveStartedListener : onCameraMoveStartedListenerList) {
        cameraMoveStartedListener.onCameraMoveStarted(reason);
      }
    }
  }

  @Override
  public void onCameraMove() {
    if (onCameraMoveListener != null && !idle) {
      onCameraMoveListener.onCameraMove();
    }

    if (!onCameraMoveListenerList.isEmpty()) {
      for (OnCameraMoveListener cameraMoveListener : onCameraMoveListenerList) {
        cameraMoveListener.onCameraMove();
      }
    }
  }

  @Override
  public void onCameraMoveCanceled() {
    if (onCameraMoveCanceledListener != null && !idle) {
      onCameraMoveCanceledListener.onCameraMoveCanceled();
    }

    if (!onCameraMoveCanceledListenerList.isEmpty()) {
      for (OnCameraMoveCanceledListener cameraMoveCanceledListener : onCameraMoveCanceledListenerList) {
        cameraMoveCanceledListener.onCameraMoveCanceled();
      }
    }
  }

  @Override
  public void onCameraIdle() {
    if (!idle) {
      idle = true;
      if (onCameraIdleListener != null) {
        onCameraIdleListener.onCameraIdle();
      }

      if (!onCameraIdleListenerList.isEmpty()) {
        for (OnCameraIdleListener cameraIdleListener : onCameraIdleListenerList) {
          cameraIdleListener.onCameraIdle();
        }
      }
    }
  }

  void addOnCameraIdleListener(@NonNull OnCameraIdleListener listener) {
    onCameraIdleListenerList.add(listener);
  }

  void removeOnCameraIdleListener(@NonNull OnCameraIdleListener listener) {
    if (onCameraIdleListenerList.contains(listener)) {
      onCameraIdleListenerList.remove(listener);
    }
  }

  void addOnCameraMoveCancelListener(OnCameraMoveCanceledListener listener) {
    onCameraMoveCanceledListenerList.add(listener);
  }

  void removeOnCameraMoveCancelListener(OnCameraMoveCanceledListener listener) {
    if (onCameraMoveCanceledListenerList.contains(listener)) {
      onCameraMoveCanceledListenerList.remove(listener);
    }
  }

  void addOnCameraMoveStartedListener(OnCameraMoveStartedListener listener) {
    onCameraMoveStartedListenerList.add(listener);
  }

  void removeOnCameraMoveStartedListener(OnCameraMoveStartedListener listener) {
    if (onCameraMoveStartedListenerList.contains(listener)) {
      onCameraMoveStartedListenerList.remove(listener);
    }
  }

  void addOnCameraMoveListener(OnCameraMoveListener listener) {
    onCameraMoveListenerList.add(listener);
  }

  void removeOnCameraMoveListener(OnCameraMoveListener listener) {
    if (onCameraMoveListenerList.contains(listener)) {
      onCameraMoveListenerList.remove(listener);
    }
  }
}