HTML Presentation Object: Hierarchy Browser

This is an example how to present hierarchical data in QPR UI using HTML presentation object and a TreeView component (https://js.syncfusion.com/demos/web/#!/bootstrap/treeview/defaultfunctionalities). When selecting nodes in the hierarchy, the id of the selected node is stored to context variable selectedNode. IF the dataset is change, the component refreshes. Also if the selectedNode variable already contains a value when the TreeView is initialized, corresponding value is selected in the TreeView.

Create an HTML presentation object with the following code.

<div id="content<#uniqueId>"></div>

<style>
#content<#uniqueId> {
  width: 100%;
  height: 100%;
}
</style>

<script>
(function() {
var selectedNodeVariable = "selectedNode";
var datasetName = "data";
var data = null;
var selectedNode = null;
var treeViewInstance = null;

window["<#contextChangeFunction>"] = function(changedVariables) {
  if (changedVariables[selectedNodeVariable] != null && changedVariables[selectedNodeVariable] != selectedNode) {
    selectedNode = changedVariables[selectedNodeVariable];
	if (treeViewInstance != null && treeViewInstance.getNode(selectedNode) != null) {
	  treeViewInstance.selectNode(selectedNode);
	  treeViewInstance.ensureVisible(selectedNode);
	}
  }
}

window["<#datasetChangeFunction>"] = function(datasetIdentifier, datasetChangeCallbackFunction) {
  if (datasetIdentifier == datasetName) datasetChangeCallbackFunction(function(datasetData) {
    datasetData.getDatasetAsObjectArray = getDatasetAsObjectArray;
    data = datasetData.getDatasetAsObjectArray();
    for (var i = 0; i < data.length; i++) {
      if (data[i].diagramname == "") data[i].diagramname = " ";
    }
    initializeAndDrawHierarchyTree();
  });
}

function initializeAndDrawHierarchyTree() {
  if (treeViewInstance != null) {
    treeViewInstance.destroy();
	treeViewInstance = null;
  }
  if (data == null || data.length == 0) {
    window.parent.setSessionVariable(selectedNodeVariable, "");
  } else {
    $("#content<#uniqueId>").ejTreeView({
      fields: {
        id: "hierarchyid",
        parentId: "hierarchyparentid",
        text: "diagramname",
		imageUrl: "iconurl",
        dataSource: data
      },
      nodeSelect: function(args) {
	    selectNode = args.id;
        window.parent.setSessionVariable(selectedNodeVariable, selectNode);
      }
    });
	treeViewInstance = $("#content<#uniqueId>").data("ejTreeView");
	if (selectedNode == null) selectedNode = data[0].hierarchyid;
	if (treeViewInstance != null && treeViewInstance.getNode(selectedNode) == null) selectedNode = data[0].hierarchyid;
	treeViewInstance.selectNode(selectedNode);
	treeViewInstance.ensureVisible(selectedNode);
	window.parent.setSessionVariable(selectedNodeVariable, selectedNode);
  }
}

function getDatasetAsObjectArray(sheetIndex) {
  if (sheetIndex === undefined) sheetIndex = 0;
  if (this.sheets == null) return null;
  if (this.sheets[sheetIndex].values.length == 0) {alert("Dataset contains no columns."); throw "Dataset contains no columns."};
  var datasetAsObjectArray = [];
  for (var row = 1; row < this.sheets[sheetIndex].values[0].length; row++) {
    var rowObject = {};
    for (var column = 0; column < this.sheets[sheetIndex].values.length; column++) {
      rowObject[this.sheets[sheetIndex].values[column][0].attribute] = this.getCellValue(sheetIndex, column, row);
    }
    datasetAsObjectArray.push(rowObject);
  }
  return datasetAsObjectArray;
}

})()
</script>

The following query gets all diagrams in a PD/EA model using QPR Reporting Expression. There needs to be modelId context variable containing the PD/EA model id. Store the query as a dataset named data.

data=BuildHierarchy(AddColumn(From('[<#modelId>].attributeasfunction(attributeasfunction="mainlevelid").ChildObjects(hierarchy="processlevels",recursive=1)', '', '', 'id(as="instanceid"),parentobjects,name(as="diagramname"),iconurl', ''), 'objectid', '\'PG.\' + ModelIdFromFullId([instanceid]) + \'.\' + ObjectIdFromFullId([instanceid])'), 'instanceid', 'objectid', 'parentobjects', 'hierarchyid', 'hierarchyparentid', 'level', 'diagramname')