Generate offline map

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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
// [WriteFile Name=GenerateOfflineMap, Category=Maps]
// [Legal]
// Copyright 2017 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.
// [Legal]

import QtQuick
import QtQuick.Controls
import QtQuick.Layouts
import Esri.ArcGISRuntime
import Esri.ArcGISExtras

Rectangle {
    id: rootRectangle
    clip: true
    width: 800
    height: 600

    readonly property url outputMapPackagePath: System.temporaryFolder.url + "/OfflineMap_%1".arg(new Date().getTime().toString())
    readonly property string webMapId: "acc027394bc84c2fb04d1ed317aac674"

    MapView {
        id: mapView
        anchors.fill: parent

        Component.onCompleted: {
            // Set the focus on MapView to initially enable keyboard navigation
            forceActiveFocus();
        }

        // Create a Map from a Portal Item
        Map {
            id: map

            PortalItem {
                id: mapPortalItem

                itemId: webMapId
                Portal {
                    loginRequired: false
                }
            }
        }

        // Create a button and anchor it to the attribution top
        DownloadButton {
            id: downloadButton
            anchors {
                horizontalCenter: parent.horizontalCenter
                bottom: mapView.attributionTop
                margins: 5
            }
            visible: map.loadStatus === Enums.LoadStatusLoaded

            onButtonClicked: extentRectangle.getRectangleEnvelope();
        }
    }

    // Create an extent rectangle for selecting the offline area
    Rectangle {
        id: extentRectangle
        anchors.centerIn: parent
        width: parent.width - 50
        height: parent.height - 125
        color: "transparent"
        visible: map.loadStatus === Enums.LoadStatusLoaded
        border {
            color: "red"
            width: 3
        }

        function getRectangleEnvelope() {
            const corner1 = mapView.screenToLocation(extentRectangle.x, extentRectangle.y);
            const corner2 = mapView.screenToLocation((extentRectangle.x + extentRectangle.width), (extentRectangle.y + extentRectangle.height));
            const envBuilder = ArcGISRuntimeEnvironment.createObject("EnvelopeBuilder");
            envBuilder.setCorners(corner1, corner2);
            const mapExtent = GeometryEngine.project(envBuilder.geometry, Factory.SpatialReference.createWebMercator());
            offlineMapTask.createDefaultGenerateOfflineMapParameters(mapExtent);
        }
    }


    // Create Offline Map Task
    OfflineMapTask {
        id: offlineMapTask
        onlineMap: map
        property var generateJob

        onErrorChanged: console.log("error:", error.message, error.additionalMessage);

        onCreateDefaultGenerateOfflineMapParametersStatusChanged: {
            if (createDefaultGenerateOfflineMapParametersStatus !== Enums.TaskStatusCompleted)
                return;

            // Take the map offline once the parameters are generated
            takeMapOffline(offlineMapTask.createDefaultGenerateOfflineMapParametersResult);
        }


        function takeMapOffline(parameters) {
            // create the job
            generateJob = offlineMapTask.generateOfflineMap(parameters, outputMapPackagePath);

            // check if job is valid
            if (generateJob) {
                // show the export window
                generateWindow.visible = true;

                // connect to the job's status changed signal to know once it is done
                generateJob.statusChanged.connect(updateJobStatus);
                // connect to the job's progress changed signal
                generateJob.progressChanged.connect(updateProgress);

                generateJob.start();
            } else {
                generateWindow.visible = true;
                generateWindow.statusText = "Task failed";
                generateWindow.hideWindow(5000);
            }
        }

        function updateJobStatus() {
            switch(generateJob.jobStatus) {
            case Enums.JobStatusFailed:
                generateWindow.statusText = "Task failed";
                generateWindow.hideWindow(5000);
                break;
            case Enums.JobStatusNotStarted:
                generateWindow.statusText = "Job not started";
                break;
            case Enums.JobStatusPaused:
                generateWindow.statusText = "Job paused";
                break;
            case Enums.JobStatusStarted:
                generateWindow.statusText = "In progress";
                break;
            case Enums.JobStatusSucceeded:
                // show any layer errors
                if (generateJob.result.hasErrors) {
                    const layerErrors = generateJob.result.layerErrors;
                    let errorText = "";
                    for (let i = 0; i < layerErrors.length; i++) {
                        const errorPair = layerErrors[i];
                        errorText += errorPair.layer.name + ": " + errorPair.error.message + "\n";
                    }
                    msgDialog.detailedText = errorText;
                    msgDialog.open();
                }

                // show the map
                generateWindow.statusText = "Complete";
                generateWindow.hideWindow(1500);
                displayOfflineMap(generateJob.result);
                break;
            default:
                console.log("default");
                break;
            }
        }

        function updateProgress() {
            generateWindow.progressText = generateJob.progress;
        }

        function displayOfflineMap(result) {
            // Set the offline map to the MapView
            mapView.map = result.offlineMap;
            downloadButton.visible = false;
            extentRectangle.visible = false;
        }

        Component.onDestruction: {
            if (generateJob) {
                generateJob.statusChanged.disconnect(updateJobStatus);
                generateJob.progressChanged.disconnect(updateProgress);
            }
        }
    }

    GenerateWindow {
        id: generateWindow
        anchors.fill: parent
    }

    Dialog {
        id: msgDialog
        modal: true
        x: Math.round(parent.width - width) / 2
        y: Math.round(parent.height - height) / 2
        standardButtons: Dialog.Ok
        title: "Layer Errors"
        property alias text : textLabel.text
        property alias detailedText : detailsLabel.text
        ColumnLayout {
            Text {
                id: textLabel
                text: "Some layers could not be taken offline."
            }
            Text {
                id: detailsLabel
            }
        }
    }
}