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DataViewUtils

  • Artigo

O DataViewUtils é um conjunto de funções e classes para simplificar a análise do objeto DataView para visuais do Power BI.

Instalação

Para instalar o pacote, execute o seguinte comando no diretório com seu visual personalizado atual:

npm install powerbi-visuals-utils-dataviewutils --save

Este comando instala o pacote e adiciona um pacote como uma dependência ao seu package.json arquivo.

DataViewWildcard

DataViewWildcardFornece a createDataViewWildcardSelector função para dar suporte à formatação condicional de uma propriedade.

createDataViewWildcardSelector Retorna um seletor necessário para definir como a entrada de formatação condicional no painel Formato será aplicada, com base em dataviewWildcardMatchingOption (InstancesAndTotals (default), InstancesOnly, TotalsOnly).

Exemplo:

import { dataViewWildcard } from "powerbi-visuals-utils-dataviewutils";

let selector = dataViewWildcard.createDataViewWildcardSelector(dataViewWildcard.DataViewWildcardMatchingOption.InstancesAndTotals);
// returns {data: [{dataViewWildcard:{matchingOption: 0}}]};

DataRoleHelper

O DataRoleHelper fornece funções para verificar funções do objeto dataView.

O módulo fornece as seguintes funções:

getMeasureIndexOfRole

Esta função localiza a medida pelo nome da função e retorna seu índice.

function getMeasureIndexOfRole(grouped: DataViewValueColumnGroup[], roleName: string): number;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewValueColumnGroup = powerbi.DataViewValueColumnGroup;
import { dataRoleHelper } from "powerbi-visuals-utils-dataviewutils";
// ...

// This object is actually a part of the dataView object.
let columnGroup: DataViewValueColumnGroup[] = [{
    values: [
        {
            source: {
                displayName: "Microsoft",
                roles: {
                    "company": true
                }
            },
            values: []
        },
        {
            source: {
                displayName: "Power BI",
                roles: {
                    "product": true
                }
            },
            values: []
        }
    ]
}];

dataRoleHelper.getMeasureIndexOfRole(columnGroup, "product");

// returns: 1

getCategoryIndexOfRole

Esta função localiza a categoria pelo nome da função e retorna seu índice.

function getCategoryIndexOfRole(categories: DataViewCategoryColumn[], roleName: string): number;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewCategoryColumn = powerbi.DataViewCategoryColumn;
import { dataRoleHelper } from "powerbi-visuals-utils-dataviewutils";
// ...

// This object is actually a part of the dataView object.
let categoryGroup: DataViewCategoryColumn[] = [
    {
        source: {
            displayName: "Microsoft",
            roles: {
                "company": true
            }
        },
        values: []
    },
    {
        source: {
            displayName: "Power BI",
            roles: {
                "product": true
            }
        },
        values: []
    }
];

dataRoleHelper.getCategoryIndexOfRole(categoryGroup, "product");

// returns: 1

hasRole

Esta função verifica se a função fornecida está definida nos metadados.

function hasRole(column: DataViewMetadataColumn, name: string): boolean;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewMetadataColumn = powerbi.DataViewMetadataColumn;
import { dataRoleHelper } from "powerbi-visuals-utils-dataviewutils";

// This object is actually a part of the dataView object.
let metadata: DataViewMetadataColumn = {
    displayName: "Microsoft",
    roles: {
        "company": true
    }
};

DataRoleHelper.hasRole(metadata, "company");

// returns: true

hasRoleInDataView

Esta função verifica se a função fornecida está definida no dataView.

function hasRoleInDataView(dataView: DataView, name: string): boolean;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataView = powerbi.DataView;
import { dataRoleHelper } from "powerbi-visuals-utils-dataviewutils";

// This object is actually a part of the dataView object.
let dataView: DataView = {
    metadata: {
        columns: [
            {
                displayName: "Microsoft",
                roles: {
                    "company": true
                }
            },
            {
                displayName: "Power BI",
                roles: {
                    "product": true
                }
            }
        ]
    }
};

DataRoleHelper.hasRoleInDataView(dataView, "product");

// returns: true

hasRoleInValueColumn

Esta função verifica se a função fornecida está definida na coluna de valor.

function hasRoleInValueColumn(valueColumn: DataViewValueColumn, name: string): boolean;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewValueColumn = powerbi.DataViewValueColumn;
import { dataRoleHelper } from "powerbi-visuals-utils-dataviewutils";

// This object is actually a part of the dataView object.
let valueColumn: DataViewValueColumn = {
    source: {
        displayName: "Microsoft",
        roles: {
            "company": true
        }
    },
    values: []
};

dataRoleHelper.hasRoleInValueColumn(valueColumn, "company");

// returns: true

DataViewObjects

O DataViewObjects fornece funções para extrair os valores dos objetos.

O módulo fornece as seguintes funções:

getValue

Esta função retorna o valor do objeto específico.

function getValue<T>(objects: DataViewObjects, propertyId: DataViewObjectPropertyIdentifier, defaultValue?: T): T;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewObjectPropertyIdentifier = powerbi.DataViewObjectPropertyIdentifier;
import { dataViewObjects } from "powerbi-visuals-utils-dataviewutils";

let property: DataViewObjectPropertyIdentifier = {
    objectName: "microsoft",
    propertyName: "bi"
};

// This object is actually a part of the dataView object.
let objects: powerbi.DataViewObjects = {
    "microsoft": {
        "windows": 5,
        "bi": "Power"
    }
};

dataViewObjects.getValue(objects, property);

// returns: Power

getObject

Esta função retorna um objeto de objetos especificados.

function getObject(objects: DataViewObjects, objectName: string, defaultValue?: IDataViewObject): IDataViewObject;

Exemplo:

import { dataViewObjects } from "powerbi-visuals-utils-dataviewutils";

// This object is actually a part of the dataView object.
let objects: powerbi.DataViewObjects = {
    "microsoft": {
        "windows": 5,
        "bi": "Power"
    }
};

dataViewObjects.getObject(objects, "microsoft");

/* returns: {
    "bi": "Power",
    "windows": 5

}*/

getFillColor

Esta função retorna uma cor sólida dos objetos.

function getFillColor(objects: DataViewObjects, propertyId: DataViewObjectPropertyIdentifier, defaultColor?: string): string;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewObjectPropertyIdentifier = powerbi.DataViewObjectPropertyIdentifier;
import { dataViewObjects } from "powerbi-visuals-utils-dataviewutils";

let property: DataViewObjectPropertyIdentifier = {
    objectName: "power",
    propertyName: "fillColor"
};

// This object is actually part of the dataView object.
let objects: powerbi.DataViewObjects = {
    "power": {
        "fillColor": {
            "solid": {
                "color": "yellow"
            }
        },
        "bi": "Power"
    }
};

dataViewObjects.getFillColor(objects, property);

// returns: yellow

getCommonValue

Esta função universal recupera a cor ou o valor de um objeto específico.

function getCommonValue(objects: DataViewObjects, propertyId: DataViewObjectPropertyIdentifier, defaultValue?: any): any;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewObjectPropertyIdentifier = powerbi.DataViewObjectPropertyIdentifier;
import { dataViewObjects } from "powerbi-visuals-utils-dataviewutils";

let colorProperty: DataViewObjectPropertyIdentifier = {
    objectName: "power",
    propertyName: "fillColor"
};

let biProperty: DataViewObjectPropertyIdentifier = {
    objectName: "power",
    propertyName: "bi"
};

// This object is actually part of the dataView object.
let objects: powerbi.DataViewObjects = {
    "power": {
        "fillColor": {
            "solid": {
                "color": "yellow"
            }
        },
        "bi": "Power"
    }
};

dataViewObjects.getCommonValue(objects, colorProperty); // returns: yellow
dataViewObjects.getCommonValue(objects, biProperty); // returns: Power

DataViewObject

O DataViewObject fornece funções para extrair o valor do objeto.

O módulo fornece as seguintes funções:

getValue

Esta função retorna um valor do objeto pelo nome da propriedade.

function getValue<T>(object: IDataViewObject, propertyName: string, defaultValue?: T): T;

Exemplo:

import { dataViewObject } from "powerbi-visuals-utils-dataviewutils";

// This object is actually a part of the dataView object.
let object: powerbi.DataViewObject = {
    "windows": 5,
    "microsoft": "Power BI"
};

dataViewObject.getValue(object, "microsoft");

// returns: Power BI

getFillColorByPropertyName

Esta função retorna uma cor sólida do objeto pelo nome da propriedade.

function getFillColorByPropertyName(object: IDataViewObject, propertyName: string, defaultColor?: string): string;

Exemplo:

import { dataViewObject } from "powerbi-visuals-utils-dataviewutils";

// This object is actually a part of the dataView object.
let object: powerbi.DataViewObject = {
    "windows": 5,
    "fillColor": {
        "solid": {
            "color": "green"
        }
    }
};

dataViewObject.getFillColorByPropertyName(object, "fillColor");

// returns: green

conversorHelper

O converterHelper fornece funções para verificar as propriedades do dataView.

O módulo fornece as seguintes funções:

categoryIsAlsoSeriesRole

Esta função verifica se a categoria também é uma série.

function categoryIsAlsoSeriesRole(dataView: DataViewCategorical, seriesRoleName: string, categoryRoleName: string): boolean;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewCategorical = powerbi.DataViewCategorical;
import { converterHelper } from "powerbi-visuals-utils-dataviewutils";
// ...


// This object is actually part of the dataView object.
let categorical: DataViewCategorical = {
    categories: [{
        source: {
            displayName: "Microsoft",
            roles: {
                "power": true,
                "bi": true
            }
        },
        values: []
    }]
};

converterHelper.categoryIsAlsoSeriesRole(categorical, "power", "bi");

// returns: true

getSeriesName

Esta função devolve um nome da série.

function getSeriesName(source: DataViewMetadataColumn): PrimitiveValue;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewMetadataColumn = powerbi.DataViewMetadataColumn;
import { converterHelper } from "powerbi-visuals-utils-dataviewutils";

// This object is actually a part of the dataView object.
let metadata: DataViewMetadataColumn = {
    displayName: "Microsoft",
    roles: {
        "power": true,
        "bi": true
    },
    groupName: "Power BI"
};

converterHelper.getSeriesName(metadata);

// returns: Power BI

isImageUrlColumn

Esta função verifica se a coluna contém um URL de imagem.

function isImageUrlColumn(column: DataViewMetadataColumn): boolean;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewMetadataColumn = powerbi.DataViewMetadataColumn;
import { converterHelper } from "powerbi-visuals-utils-dataviewutils";

// This object is actually a part of the dataView object.
let metadata: DataViewMetadataColumn = {
    displayName: "Microsoft",
    type: {
        misc: {
            imageUrl: true
        }
    }
};

converterHelper.isImageUrlColumn(metadata);

// returns: true

isWebUrlColumn

Esta função verifica se a coluna contém um URL da Web.

function isWebUrlColumn(column: DataViewMetadataColumn): boolean;

Exemplo:

import powerbi from "powerbi-visuals-api";
import DataViewMetadataColumn = powerbi.DataViewMetadataColumn;
import { converterHelper } from "powerbi-visuals-utils-dataviewutils";

// This object is actually a part of the dataView object.
let metadata: DataViewMetadataColumn = {
    displayName: "Microsoft",
    type: {
        misc: {
            webUrl: true
        }
    }
};

converterHelper.isWebUrlColumn(metadata);

// returns: true

hasImageUrlColumn

Esta função verifica se o dataView tem uma coluna com um URL de imagem.

function hasImageUrlColumn(dataView: DataView): boolean;

Exemplo:

import DataView = powerbi.DataView;
import converterHelper = powerbi.extensibility.utils.dataview.converterHelper;

// This object is actually part of the dataView object.
let dataView: DataView = {
    metadata: {
        columns: [
            {
                displayName: "Microsoft"
            },
            {
                displayName: "Power BI",
                type: {
                    misc: {
                        imageUrl: true
                    }
                }
            }
        ]
    }
};

converterHelper.hasImageUrlColumn(dataView);

// returns: true

DataViewObjectsParser

O DataViewObjectsParser fornece a maneira mais simples de analisar as propriedades do painel de formatação.

A classe fornece os seguintes métodos:

getDefault

Esse método estático retorna uma instância de DataViewObjectsParser.

static getDefault(): DataViewObjectsParser;

Exemplo:

import { dataViewObjectsParser } from "powerbi-visuals-utils-dataviewutils";
// ...

dataViewObjectsParser.getDefault();

// returns: an instance of the DataViewObjectsParser

analisar

Esse método analisa as propriedades do painel de formatação e retorna uma instância de DataViewObjectsParser.

static parse<T extends DataViewObjectsParser>(dataView: DataView): T;

Exemplo:

import powerbi from "powerbi-visuals-api";
import IVisual = powerbi.extensibility.IVisual;
import VisualUpdateOptions = powerbi.extensibility.visual.VisualUpdateOptions;
import { dataViewObjectsParser } from "powerbi-visuals-utils-dataviewutils";

/**
 * This class describes formatting panel properties.
 * Name of the property should match its name described in the capabilities.
 */
class DataPointProperties {
    public fillColor: string = "red"; // This value is a default value of the property.
}

class PropertiesParser extends dataViewObjectsParser.DataViewObjectsParser {
    /**
     * This property describes a group of properties.
     */
    public dataPoint: DataPointProperties = new DataPointProperties();
}

export class YourVisual extends IVisual {
    // implementation of the IVisual.

    private propertiesParser: PropertiesParser;

    public update(options: VisualUpdateOptions): void {
        // Parses properties.
        this.propertiesParser = PropertiesParser.parse<PropertiesParser>(options.dataViews[0]);

        // You can use the properties after parsing
        console.log(this.propertiesParser.dataPoint.fillColor); // returns "red" as default value, it will be updated automatically after any change of the formatting panel.
    }
}

enumerateObjectInstances

Importante

enumerateObjectInstances foi preterido na API versão 5.1. Ele foi substituído por getFormattingModel. Além disso, consulte FormattingModel utils.

Esse método estático enumera propriedades e retorna uma instância de VisualObjectInstanceEnumeration.

Execute-o enumerateObjectInstances no método do visual.

static enumerateObjectInstances(dataViewObjectParser: dataViewObjectsParser.DataViewObjectsParser, options: EnumerateVisualObjectInstancesOptions): VisualObjectInstanceEnumeration;

Exemplo:

import powerbi from "powerbi-visuals-api";
import IVisual = powerbi.extensibility.IVisual;
import EnumerateVisualObjectInstancesOptions = powerbi.EnumerateVisualObjectInstancesOptions;
import VisualObjectInstanceEnumeration = powerbi.VisualObjectInstanceEnumeration;
import VisualUpdateOptions = powerbi.extensibility.visual.VisualUpdateOptions;
import { dataViewObjectsParser } from "powerbi-visuals-utils-dataviewutils";

/**
 * This class describes formatting panel properties.
 * Name of the property should match its name described in the capabilities.
 */
class DataPointProperties {
    public fillColor: string = "red";
}

class PropertiesParser extends dataViewObjectsParser.DataViewObjectsParser {
    /**
     * This property describes a group of properties.
     */
    public dataPoint: DataPointProperties = new DataPointProperties();
}

export class YourVisual extends IVisual {
    // implementation of the IVisual.

    private propertiesParser: PropertiesParser;

    public update(options: VisualUpdateOptions): void {
        // Parses properties.
        this.propertiesParser = PropertiesParser.parse<PropertiesParser>(options.dataViews[0]);
    }

    /**
     * This method will be executed only if the formatting panel is open.
     */
    public enumerateObjectInstances(options: EnumerateVisualObjectInstancesOptions): VisualObjectInstanceEnumeration {
        return PropertiesParser.enumerateObjectInstances(this.propertiesParser, options);
    }
}