When showing map information relevant to only a certain area, you may wish to constrain the user's
ability to pan or zoom away.
How to use the sample
The application loads with a map whose maximum extent has been set to the borders of Colorado. Note
that you won't be able to pan far from the Colorado border or zoom out beyond the minimum scale set
by the max extent. Click the "Enable Max Extent" checkbox to disable the max extent to freely pan/zoom around the map.
How it works
Create an ArcGISMap.
Create a new envelope Envelope(Point(x, y), Point(x, y)) with the required max extent.
Wait for the map to load, then set the maximum extent of the map with map.setMaxExtent(envelope).
Create a new MapView and set the map to it.
Set map.setMaxExtent(null) to disable the maximum extent of the map.
Relevant API
ArcGISMap
Envelope
Tags
extent, limit panning, map, mapview, max extent, zoom
Sample Code
SetMaxExtentSample.java
Use dark colors for code blocksCopy
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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
/*
* Copyright 2022 Esri.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/package com.esri.samples.set_max_extent;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.geometry.Envelope;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.loadable.LoadStatus;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.Graphic;
import com.esri.arcgisruntime.mapping.view.GraphicsOverlay;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.symbology.SimpleRenderer;
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.CheckBox;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.paint.Paint;
import javafx.stage.Stage;
publicclassSetMaxExtentSampleextendsApplication{
private MapView mapView;
@Overridepublicvoidstart(Stage stage){
try {
// create stack pane and application scenevar stackPane = new StackPane();
var scene = new Scene(stackPane);
// set title, size, and add scene to stage stage.setTitle("Set Max Extent Sample");
stage.setWidth(800);
stage.setHeight(700);
stage.setScene(scene);
stage.show();
// authentication with an API key or named user is required to access basemaps and other location services String yourAPIKey = System.getProperty("apiKey");
ArcGISRuntimeEnvironment.setApiKey(yourAPIKey);
// create a map with the streets basemap style ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_STREETS);
// create a map view and set the map to it mapView = new MapView();
mapView.setMap(map);
// create an envelope with an extent covering the state of Colorado Point coloradoNorthWestPoint = new Point(-12139393.2109, 5012444.0468);
Point coloradoSouthEastPoint = new Point(-11359277.5124, 4438148.7816);
var envelope = new Envelope(coloradoNorthWestPoint, coloradoSouthEastPoint);
// create a new graphics overlay and add a new graphic to it that shows the Colorado border as a red dashed linevar graphicsOverlay = new GraphicsOverlay();
graphicsOverlay.getGraphics().add(new Graphic(envelope));
var simpleRenderer = new SimpleRenderer(
new SimpleLineSymbol(SimpleLineSymbol.Style.DASH, Color.RED, 5));
graphicsOverlay.setRenderer(simpleRenderer);
// add the graphics overlay to the map view mapView.getGraphicsOverlays().add(graphicsOverlay);
// create a checkbox for toggling max extentvar checkbox = new CheckBox("Enable Max Extent");
checkbox.setTextFill(Color.WHITE);
checkbox.setSelected(true);
checkbox.setOnMouseClicked(e -> {
if (checkbox.isSelected()) {
map.setMaxExtent(envelope);
} else {
map.setMaxExtent(null);
}
});
// create a control panelvar controlsVBox = new VBox(6);
controlsVBox.setBackground(new Background(new BackgroundFill(Paint.valueOf("rgba(0,0,0,0.5)"),
CornerRadii.EMPTY, Insets.EMPTY)));
controlsVBox.setPadding(new Insets(10.0));
controlsVBox.setMaxSize(160, 40);
controlsVBox.setDisable(true);
// add the checkbox to the control panel controlsVBox.getChildren().add(checkbox);
// listen for the map to finish loading, and check it has loaded map.addDoneLoadingListener(() -> {
if (map.getLoadStatus() == LoadStatus.LOADED) {
// constrain the display of the map to the borders of Colorado by setting the map's max extent to the envelope map.setMaxExtent(envelope);
// set the map view's viewpoint with the envelope mapView.setViewpoint(new Viewpoint(envelope));
// enable the UI now that the map has loaded controlsVBox.setDisable(false);
} elseif (map.getLoadStatus() == LoadStatus.FAILED_TO_LOAD) {
new Alert(Alert.AlertType.ERROR, "Map failed to load").show();
}
});
// add the map view and the control panel to the stack pane stackPane.getChildren().addAll(mapView, controlsVBox);
StackPane.setAlignment(controlsVBox, Pos.TOP_LEFT);
StackPane.setMargin(controlsVBox, new Insets(10, 0, 0, 10));
} catch (Exception e) {
// on any error, display the stack trace. e.printStackTrace();
}
}
/**
* Stops and releases all resources used in application.
*/@Overridepublicvoidstop(){
if (mapView != null) {
mapView.dispose();
}
}
/**
* Opens and runs application.
*
* @param args arguments passed to this application
*/publicstaticvoidmain(String[] args){
Application.launch(args);
}
}