View in QML C++ View on GitHub Sample viewer app
Get a server-defined trace configuration for a given tier and modify its traversability scope, add new condition barriers and control what is included in the subnetwork trace result.
Use case
While some traces are built from an ad-hoc group of parameters, many are based on a variation of the trace configuration taken from the subnetwork definition. For example, an electrical trace will be based on the trace configuration of the subnetwork, but may add additional clauses to constrain the trace along a single phase. Similarly, a trace in a gas or electric design application may include features with a status of "In Design" that are normally excluded from trace results.
How to use the sample
The sample loads with a server-defined trace configuration from a tier. Check or uncheck which options to include in the trace - such as containers or barriers. Use the selection boxes to define a new condition network attribute comparison, and then use 'Add' to add the it to the trace configuration. Click 'Trace' to run a subnetwork trace with this modified configuration from a default starting location.
Example barrier conditions for the default dataset:
'Transformer Load' Equal '15'
'Phases Current' DoesNotIncludeTheValues 'A'
'Generation KW' LessThan '50'
How it works
Create and load a UtilityNetwork
with a feature service URL, then get an asset type and a tier by their names.
Populate the choice list for the comparison source with the non-system defined Definition.networkAttributes
. Populate the choice list for the comparison operator with the enum values from UtilityAttributeComparisonOperator
.
Create a UtilityElement
from this asset type to use as the starting location for the trace.
Update the selected barrier expression and the checked options in the UI using this tier's TraceConfiguration
returned from defaultTraceConfiguration()
.
When 'Network Attribute' is selected, if its Domain
is a CodedValueDomain
, populate the choice list for the comparison value with its CodedValues
. Otherwise, display a free-form textbox for entering an attribute value.
When 'Add' is clicked, create a new UtilityNetworkAttributeComparison
using the selected comparison source, operator, and selected or typed value. Use the selected source's NetworkAttribute.dataType
to convert the comparison value to the correct data type.
If the Traversability's list of Barriers
is not empty, create a UtilityTraceOrCondition
with the existing Barriers
and the new comparison from Step 6.
When 'Trace' is clicked, create UtilityTraceParameters
passing in UtilityTraceType.subnetwork
and the default starting location. Set its TraceConfiguration
with the modified options, selections, and expression; then run a UtilityNetwork.trace
.
When Reset
is clicked, set the trace configurations expression back to its original value.
Display the count of returned UtilityElementTraceResult.elements
.
Relevant API
CodedValueDomain
UtilityAssetType
UtilityAttributeComparisonOperator
UtilityCategory
UtilityCategoryComparison
UtilityCategoryComparisonOperator
UtilityDomainNetwork
UtilityElement
UtilityElementTraceResult
UtilityNetwork
UtilityNetworkAttribute
UtilityNetworkAttributeComparison
UtilityNetworkDefinition
UtilityTerminal
UtilityTier
UtilityTraceAndCondition
UtilityTraceConfiguration
UtilityTraceOrCondition
UtilityTraceParameters
UtilityTraceResult
UtilityTraceType
UtilityTraversability
About the data
The Naperville electrical network feature service, hosted on ArcGIS Online, contains a utility network used to run the subnetwork-based trace shown in this sample.
Using utility network on ArcGIS Enterprise 10.8 requires an ArcGIS Enterprise member account licensed with the Utility Network user type extension . Please refer to the utility network services documentation .
Credentials:
Username: viewer01
Password: I68VGU^nMurF
category comparison, condition barriers, network analysis, network attribute comparison, subnetwork trace, trace configuration, traversability, utility network, validate consistency
Sample CodeConfigureSubnetworkTrace.qml
Use dark colors for code blocks Copy
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
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
// [WriteFile Name=ConfigureSubnetworkTrace, Category=UtilityNetwork]
// [Legal]
// Copyright 2020 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 QtQuick.Shapes
import Esri.ArcGISRuntime
Rectangle {
id: rootRectangle
clip : true
width : 800
height : 600
property var attributeStringListModel : []
property var initialExpression : null
property var networkDefinition : null
property var traceConfiguration : null
property var utilityElementStartingLocation : null
readonly property string assetGroupName : "Circuit Breaker"
readonly property string assetTypeName : "Three Phase"
readonly property string deviceTableName : "Electric Distribution Device"
readonly property string domainNetworkName : "ElectricDistribution"
readonly property string globalId : "{1CAF7740-0BF4-4113-8DB2-654E18800028}"
readonly property string tierName : "Medium Voltage Radial"
readonly property url featureLayerUrl : "https://sampleserver7.arcgisonline.com/server/rest/services/UtilityNetwork/NapervilleElectric/FeatureServer"
readonly property var attributeComparisonOperatorModel : [ "Equal" , "NotEqual" , "GreaterThan" , "GreaterThanEqual" , "LessThan" , "LessThanEqual" , "IncludesTheValues" , "DoesNotIncludeTheValues" , "IncludesAny" , "DoesNotIncludeAny" ]
ListModel {
id: valueSelectionListModel
}
UtilityNetwork {
id: utilityNetwork
url : featureLayerUrl
Credential {
username : "viewer01"
password : "I68VGU^nMurF"
}
onTraceStatusChanged : {
if (traceStatus !== Enums.TaskStatusCompleted)
return ;
if (traceResult.count === 0 ) {
busy.visible = false ;
return ;
}
// Get the first result.
const myTraceResult = traceResult.get( 0 );
const resultElements = myTraceResult.elements;
// Display the number of elements found by the trace.
dialogText.text = qsTr( "%1 elements found." .arg(resultElements.length))
dialog.open();
busyIndicator.visible = false ;
}
onErrorChanged : {
dialogText.text = qsTr( "%1 - %2" .arg(error.message).arg(error.additionalMessage));
dialog.open();
busyIndicator.visible = false ;
}
onLoadStatusChanged : {
if (loadStatus !== Enums.LoadStatusLoaded)
return ;
busyIndicator.visible = false ;
networkDefinition = utilityNetwork.definition;
// Build the choice lists for network attribute comparison.
for ( let i = 0 ; i < definition.networkAttributes.length; i++) {
if (!networkDefinition.networkAttributes[i].systemDefined)
attributeStringListModel.push(networkDefinition.networkAttributes[i].name);
}
networkAttributeComboBox.model = attributeStringListModel;
const networkSource = networkDefinition.networkSource(deviceTableName);
const assetGroup = networkSource.assetGroup(assetGroupName);
const assetType = assetGroup.assetType(assetTypeName);
// Create a default starting location.
utilityElementStartingLocation = utilityNetwork.createElementWithAssetType(assetType, globalId);
const terminals = utilityElementStartingLocation.assetType.terminalConfiguration.terminals;
// Set the terminal for this location. (For our case, we use the 'Load' terminal.)
for ( let i = 0 ; i < terminals.length; i++) {
const terminal = terminals[i];
if (terminal.name === "Load" )
utilityElementStartingLocation.terminal = terminal;
}
// Get a default trace configuration from a tier to update the UI.
const domainNetwork = networkDefinition.domainNetwork(domainNetworkName);
const utilityTierSource = domainNetwork.tier(tierName);
// Set the trace configuration.
traceConfiguration = utilityTierSource.defaultTraceConfiguration();
initialExpression = traceConfiguration.traversability.barriers;
// Set the traversability scope.
traceConfiguration.traversability.scope = Enums.UtilityTraversabilityScopeJunctions;
expressionBuilder.text = expressionToString(initialExpression);
}
onComponentCompleted : {
busyIndicator.visible = true ;
load();
}
}
function updateInputMethod ( currentText, currentIndex ) {
if (networkDefinition) {
const workingDomain = networkDefinition.networkAttribute(currentText).domain;
if (workingDomain) {
valueSelectionListModel.clear();
for ( let i = 0 ; i < workingDomain.codedValues.length; i++) {
valueSelectionListModel.append({ value : workingDomain.codedValues[i].name})
}
valueSelectionComboBox.model = valueSelectionListModel;
valueSelectionComboBox.currentIndex = 0 ;
inputTextField.visible = false ;
} else {
inputTextField.visible = true ;
}
}
}
function expressionToString ( expression ) {
const traceConditionType = expression.traceConditionType;
const networkAttribute = expression.networkAttribute;
const otherNetworkAttribute = expression.otherNetworkAttribute;
const operatorAsString = comparisonOperatorToString(expression.comparisonOperator)
switch (traceConditionType) {
case Enums.UtilityTraceConditionTypeUtilityNetworkAttributeComparison :
// check if attribute domain is a coded value domain.
if (networkAttribute.domain && (networkAttribute.domain.domainType === Enums.DomainTypeCodedValueDomain)) {
const dataType = networkAttribute.dataType;
const domain = networkAttribute.domain;
const codedValueName = domain.codedValues[expression.value].name;
return "`%1` %2 `%3`" .arg(networkAttribute.name).arg(operatorAsString).arg(codedValueName);
} else {
return "`%1` %2 `%3`" .arg(networkAttribute.name).arg(operatorAsString).arg(otherNetworkAttribute? otherNetworkAttribute.name : expression.value)
}
case Enums.UtilityTraceConditionTypUtilityCategoryComparisone :
return "`%1` %2" .arg(networkAttribute.category.name).arg(networkAttribute.comparisonOperator === Enums.UtilityCategoryComparisonOperatorExists ? "Exists" : "DoesNotExist" );
case Enums.UtilityTraceConditionTypeUtilityTraceAndCondition :
return "`%1` AND\n `%3`" .arg(expressionToString(expression.leftExpression)).arg(expressionToString(expression.rightExpression));
case Enums.UtilityTraceConditionTypeUtilityTraceOrCondition :
return "`%1` OR\n `%3`" .arg(expressionToString(expression.leftExpression)).arg(expressionToString(expression.rightExpression));
default :
return "Unknown trace conditional expression" ;
}
}
function comparisonOperatorToString ( comparisonOperator ) {
switch (comparisonOperator) {
case Enums.UtilityAttributeComparisonOperatorEqual :
return "Equal" ;
case Enums.UtilityAttributeComparisonOperatorNotEqual :
return "NotEqual" ;
case Enums.UtilityAttributeComparisonOperatorGreaterThan :
return "GreaterThan" ;
case Enums.UtilityAttributeComparisonOperatorGreaterThanEqual :
return "GreaterThanEqual" ;
case Enums.UtilityAttributeComparisonOperatorLessThan :
return "LessThan" ;
case Enums.UtilityAttributeComparisonOperatorLessThanEqual :
return "LessThanEqual" ;
case Enums.UtilityAttributeComparisonOperatorIncludesTheValues :
return "IncludesTheValues" ;
case Enums.UtilityAttributeComparisonOperatorDoesNotIncludeTheValues :
return "DoesNotIncludeTheValues" ;
case Enums.UtilityAttributeComparisonOperatorIncludesAny :
return "IncludesAny" ;
case Enums.UtilityAttributeComparisonOperatorDoesNotIncludeAny :
return "DoesNotIncludeAny" ;
default :
return "Unknown comparison operator" ;
}
}
function addCondition ( ) {
// NOTE: You may also create a UtilityCategoryComparison with UtilityNetworkDefinition.Categories and UtilityCategoryComparisonOperator.
const selectedNetworkAttribute = networkDefinition.networkAttribute(networkAttributeComboBox.currentText);
const data = convertToDataType(valueSelectionComboBox.visible ? valueSelectionComboBox.currentIndex : inputTextField.text , selectedNetworkAttribute.dataType)
// check to make sure the conversion was successful.
if (!data) {
dialogText.text = qsTr( "Invalid input. Please try again." )
dialog.open();
return ;
}
// NOTE: You may also create a UtilityNetworkAttributeComparison with another NetworkAttribute.
const expression = ArcGISRuntimeEnvironment.createObject( "UtilityNetworkAttributeComparison" , {
networkAttribute : selectedNetworkAttribute,
comparisonOperator : comparisonOperatorComboBox.currentIndex,
value : data});
const otherExpression = traceConfiguration.traversability.barriers;
// NOTE: You may also combine expressions with UtilityTraceAndCondition
const combineExpressions = ArcGISRuntimeEnvironment.createObject( "UtilityTraceOrCondition" , {
leftExpression : otherExpression,
rightExpression : expression
});
traceConfiguration.traversability.barriers = combineExpressions;
expressionBuilder.text = expressionToString(combineExpressions);
}
function convertToDataType ( data, dataType ) {
if (!data)
return ;
switch (dataType) {
case Enums.UtilityNetworkAttributeDataTypeInteger :
return parseInt (data, 10 );
case Enums.UtilityNetworkAttributeDataTypeFloat :
case Enums.UtilityNetworkAttributeDataTypeDouble :
return data;
case Enums.UtilityNetworkAttributeDataTypeBoolean :
return data == 1 ? true : false ;
default :
return ;
}
}
function reset ( ) {
traceConfiguration.traversability.barriers = initialExpression;
expressionBuilder.text = expressionToString(initialExpression);
}
function trace ( ) {
if (!utilityNetwork || !utilityElementStartingLocation) {
return ;
}
busyIndicator.visible = true ;
const startingLocations = [utilityElementStartingLocation];
// initialize utility trace parameters with the starting location.
params.startingLocations = startingLocations;
params.traceType = Enums.UtilityTraceTypeSubnetwork;
params.traceConfiguration = traceConfiguration;
// trace the network
utilityNetwork.trace(params);
}
UtilityTraceParameters {
id: params
}
Rectangle {
anchors.fill : parent
color : "lightgrey"
ScrollView {
id: scrollView
anchors.fill : parent
ColumnLayout {
id: controlItemsLayout
anchors.left : parent .left
anchors.right : parent .right
CheckBox {
text : qsTr( "Include barriers" )
Layout.fillWidth : true
checkState : Qt.Checked
enabled : !busyIndicator.visible
onCheckStateChanged : traceConfiguration.includeBarriers = checked;
}
CheckBox {
text : qsTr( "Include containers" )
Layout.fillWidth : true
checkState : Qt.Checked
enabled : !busyIndicator.visible
onCheckStateChanged : traceConfiguration.includeContainers = checked;
}
Shape {
height : 2
ShapePath {
strokeWidth : 1
strokeColor : "black"
strokeStyle : ShapePath.SolidLine
startX : 2 ; startY : 0
PathLine { x : controlItemsLayout.width - 2 ; y : 0 }
}
}
Text {
text : qsTr( "Example barrier condition for this data. 'Transformer Load' Equal '15'" )
font.pixelSize : 11
Layout.minimumWidth : rootRectangle.width
horizontalAlignment : Text.AlignHCenter
}
Shape {
height : 2
ShapePath {
strokeWidth : 1
strokeColor : "black"
strokeStyle : ShapePath.SolidLine
startX : 2 ; startY : 0
PathLine { x : controlItemsLayout.width - 2 ; y : 0 }
}
}
Text {
text : qsTr( "New Barrier Condition:" )
Layout.fillWidth : true
}
ComboBox {
id: networkAttributeComboBox
Layout.fillWidth : true
enabled : !busyIndicator.visible
onCurrentTextChanged : updateInputMethod(currentText, currentIndex);
}
ComboBox {
id: comparisonOperatorComboBox
model : attributeComparisonOperatorModel
Layout.fillWidth : true
enabled : !busyIndicator.visible
}
RowLayout {
ComboBox {
id: valueSelectionComboBox
Layout.fillWidth : true
enabled : !busyIndicator.visible
visible : !inputTextField.visible
}
TextField {
id: inputTextField
Layout.minimumHeight : valueSelectionComboBox.height
Layout.fillWidth : true
visible : true
validator : DoubleValidator {}
color : "black"
placeholderText : qsTr( "Enter value here" )
placeholderTextColor : "black"
selectByMouse : true
background : Rectangle {
anchors.centerIn : parent
height : parent .height
width : parent .width
color : "white"
}
}
}
Button {
text : qsTr( "Add" )
Layout.fillWidth : true
enabled : !busyIndicator.visible
onClicked : addCondition();
}
ScrollView {
Layout.fillWidth : true
Layout.maximumWidth : rootRectangle.width
Layout.minimumHeight : 50
Layout.maximumHeight : .15 * rootRectangle.height
clip : true
Row {
anchors.fill : parent
Text {
id: expressionBuilder
}
}
}
RowLayout {
Button {
text : qsTr( "Trace" )
Layout.fillWidth : true
enabled : !busyIndicator.visible
onClicked : trace();
}
Button {
text : qsTr( "Reset" )
Layout.fillWidth : true
enabled : !busyIndicator.visible
onClicked : reset();
}
}
}
}
}
Dialog {
id: dialog
modal : true
standardButtons : Dialog.Ok
x : ( parent .width - width) / 2
y : ( parent .height - height) / 2
Text {
id: dialogText
anchors.centerIn : parent
}
}
BusyIndicator {
id: busyIndicator
anchors.centerIn : parent
visible : false
}
}