Create Custom visuals - Set bar color

anandsoftweb — Tue, 01 May 2018 12:29:28 GMT

Hello All,

I am developing custome visual for Stack bar chart and I am facing issue while implementing color palette,

I have added color palette successfully but not able to save its value and retrive it in bar.

Once we select color from palette it will again set as default.

Below is my code snipet from custom visual.

let colorPalette: IColorPalette = hst.colorPalette;
            if (this.ColumnValues.length > 0 ) 
            {
                for(var i=0; i < this.ColumnValues.length; i++) 
                {
                    let defaultColor: Fill = {
                        solid: {
                            color: colorPalette.getColor(this.ColumnValues[i] + '').value
                        }
                    };
                    var objn  = { FieldName: this.ColumnValues[i] };
                    
                    objn["Color"] = Visual.getCategoricalObjectValue<Fill>(this.ColumnValues[i], i, 'colorSelector', 'fill', defaultColor).solid.color,
                    objn["LegendLabel"] = this.ColumnValues[i];
                    objn["selectionId"] = Visual.getSelectionIds(element.dataViews[0],hst)
                    this.stackOriginalFields.push(objn);
                }
            }
			
			*ColumnValues = Two Different Value of Catehory
			
			public enumerateObjectInstances(options: EnumerateVisualObjectInstancesOptions): VisualObjectInstanceEnumeration {
            let objectName = options.objectName;
            let objectEnumeration: VisualObjectInstance[] = [];                
            var c = this.stackOriginalFields;
            
			 switch(objectName) {
			 case 'colorSelector':
                    for (let barDataPoint of c) {
                        
                        objectEnumeration.push({
                            objectName: objectName,
                            displayName: barDataPoint.LegendLabel ,
                            properties: {
                                fill: {
                                    solid: {
                                        Color: barDataPoint.Color
                                    }
                                }
                            },
                            //selector: barDataPoint.LegendLabel
							//selector:barDataPoint.selectionId.getSelector() //Its not working						
                            selector:barDataPoint.selectionId
                        });
                    }
                    break;
			 };        
            
            return objectEnumeration;
			}
			
			
			
			public static getCategoricalObjectValue<T>(category: DataViewCategoryColumn, index: number, objectName: string, propertyName: string, defaultValue: T): T {
            let categoryObjects = category.objects;
            if (categoryObjects) {
                
                let categoryObject: DataViewObject = categoryObjects[index];
                if (categoryObject) {                    
                    let object = categoryObject[objectName];
                    if (object) {
                        console.log("object"+object)
                        let property: T = <T>object[propertyName];
                        if (property !== undefined) {
                            return property;
                        }
                    }
                }
            }
            return defaultValue;
        }

        private static getSelectionIds(
            dataView: DataView,
            host: IVisualHost
        😞 powerbi.visuals.ISelectionId[] {
            const queryName: string = dataView.table.columns[0].queryName;

            return dataView.table.identity.map((identity: DataViewScopeIdentity) => {
                const categoryColumn: DataViewCategoryColumn = {
                    source: {
                        queryName,
                        displayName: null
                    },
                    values: null,
                    identity: [identity]
                };

                return host.createSelectionIdBuilder()
                    .withCategory(categoryColumn, 0)
                    .withMeasure(queryName)
                    .createSelectionId();
            });
        }
			
			
	*In Capabilities.json file
	dataViewMappings": [
      {
        "table": {
          "rows": {
            "select": [
              { "for": { "in": "Columnvalues" }}
            ]
          }
        }
      }
    ]

Thanks In Advance

Re: Create Custom visuals - Set bar color

v-viig — Wed, 02 May 2018 12:28:39 GMT

It seems this issue is related to:

selector:barDataPoint.selectionId

But Power BI host expects a Selector not SelectionId. To fix this issue we would recommned to use:

selector:barDataPoint.selectionId.getSelector()

Ignat Vilesov,

Software Engineer

Microsoft Power BI Custom Visuals

pbicvsupport@microsoft.com

topic Create Custom visuals - Set bar color in Developer

Create Custom visuals - Set bar color

Re: Create Custom visuals - Set bar color