Pridanie podpory pre prechod na detaily
Ak má vizuál hierarchiu, môžete používateľom povoliť používať funkciu prechodu na detaily služby Power BI, aby sa zobrazili ďalšie podrobnosti.
Prečítajte si viac o funkcii prechodu na detaily v službe Power BI v režime prechodu na detaily v služba Power BI. Ak chcete povoliť vizuálu dynamicky povoliť alebo zakázať funkciu prechodu na detaily, pozrite si tému Dynamický ovládací prvok prechodu na detaily.
Povolenie podpory prechodu na detaily vo vizuáli
Ak chcete podporovať akcie prechodu na detaily vo vizuáli, pridajte nové pole s capabilities.json
názvom drill-down
. Toto pole má jednu vlastnosť s názvom roles
, ktorá obsahuje názov roly údajov, s ktorou chcete povoliť akcie prechodu na detaily.
"drilldown": {
"roles": [
"category"
]
}
Poznámka
Rola drill-down dataRole musí byť Grouping
typu .
max
Vlastnosť v podmienkach dataRole musí byť nastavená na hodnotu 1.
Po pridaní roly do poľa prechodu na detaily môžu používatelia presunúť do roly údajov viacero polí.
Napríklad:
{
"dataRoles": [
{
"displayName": "Category",
"name": "category",
"kind": "Grouping"
},
{
"displayName": "Value",
"name": "value",
"kind": "Measure"
}
],
"drilldown": {
"roles": [
"category"
]
},
"dataViewMappings": [
{
"categorical": {
"categories": {
"for": {
"in": "category"
}
},
"values": {
"select": [
{
"bind": {
"to": "value"
}
}
]
}
}
}
]
}
Vytvorenie vizuálu s podporou prechodu na detaily
Ak chcete vytvoriť vizuál s podporou prechodu na detaily, spustite nasledujúci príkaz:
pbiviz new testDrillDown -t default
Ak chcete vytvoriť predvolený vzorový vizuál, použite vyššie uvedenú ukážku na novovytvorený vizuál capabilities.json
.
Vytvorte vlastnosť pre div
kontajner na uchovávanie prvkov HTML vizuálu:
"use strict";
import "core-js/stable";
import "./../style/visual.less";
// imports
export class Visual implements IVisual {
// visual properties
// ...
private div: HTMLDivElement; // <== NEW PROPERTY
constructor(options: VisualConstructorOptions) {
// constructor body
// ...
}
public update(options: VisualUpdateOptions) {
// update method body
// ...
}
/**
* Returns properties pane formatting model content hierarchies, properties and latest formatting values, Then populate properties pane.
* This method is called once each time we open the properties pane or when the user edits any format property.
*/
public getFormattingModel(): powerbi.visuals.FormattingModel {
return this.formattingSettingsService.buildFormattingModel(this.formattingSettings);
}
}
Aktualizujte konštruktor vizuálu:
export class Visual implements IVisual {
// visual properties
// ...
private div: HTMLDivElement;
constructor(options: VisualConstructorOptions) {
console.log('Visual constructor', options);
this.formattingSettingsService = new FormattingSettingsService();
this.target = options.element;
this.updateCount = 0;
if (document) {
const new_p: HTMLElement = document.createElement("p");
new_p.appendChild(document.createTextNode("Update count:"));
const new_em: HTMLElement = document.createElement("em");
this.textNode = document.createTextNode(this.updateCount.toString());
new_em.appendChild(this.textNode);
new_p.appendChild(new_em);
this.div = document.createElement("div"); // <== CREATE DIV ELEMENT
this.target.appendChild(new_p);
}
}
}
Ak chcete vytvoriť button
metódu, aktualizujte metódu vizuálu update
:
export class Visual implements IVisual {
// ...
public update(options: VisualUpdateOptions) {
this.formattingSettings = this.formattingSettingsService.populateFormattingSettingsModel(VisualFormattingSettingsModel, options.dataViews);
console.log('Visual update', options);
const dataView: DataView = options.dataViews[0];
const categoricalDataView: DataViewCategorical = dataView.categorical;
// don't create elements if no data
if (!options.dataViews[0].categorical ||
!options.dataViews[0].categorical.categories) {
return
}
// to display current level of hierarchy
if (typeof this.textNode !== undefined) {
this.textNode.textContent = categoricalDataView.categories[categoricalDataView.categories.length - 1].source.displayName.toString();
}
// remove old elements
// for better performance use D3js pattern:
// https://d3js.org/#enter-exit
while (this.div.firstChild) {
this.div.removeChild(this.div.firstChild);
}
// create buttons for each category value
categoricalDataView.categories[categoricalDataView.categories.length - 1].values.forEach( (category: powerbi.PrimitiveValue, index: number) => {
let button = document.createElement("button");
button.innerText = category.toString();
this.div.appendChild(button);
})
}
// ...
Použite jednoduché štýly v časti .\style\visual.less
:
button {
margin: 5px;
min-width: 50px;
min-height: 50px;
}
Pripravte vzorové údaje na testovanie vizuálu:
H1 | H2 | H3 | HODNOTY |
---|---|---|---|
A | A1 | A11 | 1 |
A | A1 | A12 | 2 |
A | A2 | A21 | 3 |
A | A2 | A22 | 4 |
A | A3 | A31 | 5 |
A | A3 | A32 | 6 |
B | B1 | B11 | 7 |
B | B1 | B12 | 8 |
B | B2 | B21 | 9 |
B | B2 | B22 | 10 |
B | B3 | B31 | 11 |
B | B3 | B32 | 12 |
Vytvorte hierarchiu v aplikácii Power BI Desktop:
Zahrňte do novej hierarchie všetky stĺpce kategórií (H1, H2, H3):
Po týchto krokoch by ste mali získať nasledujúci vizuál:
Pridanie kontextovej ponuky do prvkov vizuálu
Ak chcete pridať kontextovú ponuku k tlačidlám vo vizuáli:
Uložte host
objekt vo vlastnostiach vizuálu a zavolajte createSelectionManager
metódu do funkcie Create Selection Manager, čím zobrazíte kontextovú ponuku pomocou rozhrania API vizuálov služby Power BI.
"use strict";
import "core-js/stable";
import "./../style/visual.less";
// default imports
import IVisualHost = powerbi.extensibility.visual.IVisualHost;
import ISelectionManager = powerbi.extensibility.ISelectionManager;
import ISelectionId = powerbi.visuals.ISelectionId;
export class Visual implements IVisual {
// visual properties
// ...
private div: HTMLDivElement;
private host: IVisualHost; // <== NEW PROPERTY
private selectionManager: ISelectionManager; // <== NEW PROPERTY
constructor(options: VisualConstructorOptions) {
// constructor body
// save the host in the visuals properties
this.host = options.host;
// create selection manager
this.selectionManager = this.host.createSelectionManager();
// ...
}
public update(options: VisualUpdateOptions) {
// update method body
// ...
}
// ...
}
Zmeňte telo spätného forEach
volania funkcie na:
categoricalDataView.categories[categoricalDataView.categories.length - 1].values.forEach( (category: powerbi.PrimitiveValue, index: number) => {
// create selectionID for each category value
let selectionID: ISelectionId = this.host.createSelectionIdBuilder()
.withCategory(categoricalDataView.categories[0], index)
.createSelectionId();
let button = document.createElement("button");
button.innerText = category.toString();
// add event listener to click event
button.addEventListener("click", (event) => {
// call select method in the selection manager
this.selectionManager.select(selectionID);
});
button.addEventListener("contextmenu", (event) => {
// call showContextMenu method to display context menu on the visual
this.selectionManager.showContextMenu(selectionID, {
x: event.clientX,
y: event.clientY
});
event.preventDefault();
});
this.div.appendChild(button);
});
Použitie údajov na vizuál:
V poslednom kroku by ste mali získať vizuál s výbermi a kontextovou ponukou:
Pridanie podpory prechodu na detaily pre priradenie zobrazenia maticových údajov
Ak chcete otestovať vizuál s priradeniami zobrazenia maticových údajov, najskôr si pripravte vzorové údaje:
Riadok 1 | Riadok 2 | Riadok 3 | Stĺpec 1 | Stĺpec 2 | Stĺpec 3 | Hodnoty |
---|---|---|---|---|---|---|
R1 | R11 | R111 | C1 | C11 | C111 | 1 |
R1 | R11 | R112 | C1 | C11 | C112 | 2 |
R1 | R11 | R113 | C1 | C11 | C113 | 3 |
R1 | R12 | R121 | C1 | C12 | C121 | 4 |
R1 | R12 | R122 | C1 | C12 | C122 | 5 |
R1 | R12 | R123 | C1 | C12 | C123 | 6 |
R1 | R13 | R131 | C1 | C13 | C131 | 7 |
R1 | R13 | R132 | C1 | C13 | C132 | 8 |
R1 | R13 | R133 | C1 | C13 | C133 | 9 |
R2 | R21 | R211 | C2 | C21 | C211 | 10 |
R2 | R21 | R212 | C2 | C21 | C212 | 11 |
R2 | R21 | R213 | C2 | C21 | C213 | 12 |
R2 | R22 | R221 | C2 | C22 | C221 | 13 |
R2 | R22 | R222 | C2 | C22 | C222 | 14 |
R2 | R22 | R223 | C2 | C22 | C223 | 16 |
R2 | R23 | R231 | C2 | C23 | C231 | 17 |
R2 | R23 | R232 | C2 | C23 | C232 | 18 |
R2 | R23 | R233 | C2 | C23 | C233 | 19 |
Potom použite nasledujúce priradenie zobrazenia údajov na vizuál:
{
"dataRoles": [
{
"displayName": "Columns",
"name": "columns",
"kind": "Grouping"
},
{
"displayName": "Rows",
"name": "rows",
"kind": "Grouping"
},
{
"displayName": "Value",
"name": "value",
"kind": "Measure"
}
],
"drilldown": {
"roles": [
"columns",
"rows"
]
},
"dataViewMappings": [
{
"matrix": {
"columns": {
"for": {
"in": "columns"
}
},
"rows": {
"for": {
"in": "rows"
}
},
"values": {
"for": {
"in": "value"
}
}
}
}
]
}
Použitie údajov na vizuál:
Importujte požadované rozhrania na spracovanie priradení zobrazenia maticových údajov:
// ...
import DataViewMatrix = powerbi.DataViewMatrix;
import DataViewMatrixNode = powerbi.DataViewMatrixNode;
import DataViewHierarchyLevel = powerbi.DataViewHierarchyLevel;
// ...
Vytvorte dve vlastnosti pre dva div
prvky riadkov a stĺpcov:
export class Visual implements IVisual {
// ...
private rowsDiv: HTMLDivElement;
private colsDiv: HTMLDivElement;
// ...
constructor(options: VisualConstructorOptions) {
// constructor body
// ...
// Create div elements and append to main div of the visual
this.rowsDiv = document.createElement("div");
this.target.appendChild(this.rowsDiv);
this.colsDiv = document.createElement("div");
this.target.appendChild(this.colsDiv);
}
// ...
}
Pred vykreslením prvkov skontrolujte údaje a zobrazte aktuálnu úroveň hierarchie:
export class Visual implements IVisual {
// ...
constructor(options: VisualConstructorOptions) {
// constructor body
}
public update(options: VisualUpdateOptions) {
this.formattingSettings = this.formattingSettingsService.populateFormattingSettingsModel(VisualFormattingSettingsModel, options.dataViews);
console.log('Visual update', options);
const dataView: DataView = options.dataViews[0];
const matrixDataView: DataViewMatrix = dataView.matrix;
// if the visual doesn't receive the data no reason to continue rendering
if (!matrixDataView ||
!matrixDataView.columns ||
!matrixDataView.rows ) {
return
}
// to display current level of hierarchy
if (typeof this.textNode !== undefined) {
this.textNode.textContent = categoricalDataView.categories[categoricalDataView.categories.length - 1].source.displayName.toString();
}
// ...
}
// ...
}
Vytvorte funkciu treeWalker
na prechádzania hierarchiou:
export class Visual implements IVisual {
// ...
public update(options: VisualUpdateOptions) {
// ...
// if the visual doesn't receive the data no reason to continue rendering
if (!matrixDataView ||
!matrixDataView.columns ||
!matrixDataView.rows ) {
return
}
const treeWalker = (matrixNode: DataViewMatrixNode, index: number, levels: DataViewHierarchyLevel[], div: HTMLDivElement) => {
// ...
if (matrixNode.children) {
// ...
// traversing child nodes
matrixNode.children.forEach((node, index) => treeWalker(node, index, levels, childDiv));
}
}
// traversing rows
const rowRoot: DataViewMatrixNode = matrixDataView.rows.root;
rowRoot.children.forEach((node, index) => treeWalker(node, index, matrixDataView.rows.levels, this.rowsDiv));
// traversing columns
const colRoot = matrixDataView.columns.root;
colRoot.children.forEach((node, index) => treeWalker(node, index, matrixDataView.columns.levels, this.colsDiv));
}
// ...
}
Vygenerujte výbery pre údajové body.
const treeWalker = (matrixNode: DataViewMatrixNode, index: number, levels: DataViewHierarchyLevel[], div: HTMLDivElement) => {
// generate selectionID for each node of matrix
const selectionID: ISelectionID = this.host.createSelectionIdBuilder()
.withMatrixNode(matrixNode, levels)
.createSelectionId();
// ...
if (matrixNode.children) {
// ...
// traversing child nodes
matrixNode.children.forEach((node, index) => treeWalker(node, index, levels, childDiv));
}
}
Vytvorte div
prvok pre každú úroveň hierarchie:
const treeWalker = (matrixNode: DataViewMatrixNode, index: number, levels: DataViewHierarchyLevel[], div: HTMLDivElement) => {
// generate selectionID for each node of matrix
const selectionID: ISelectionID = this.host.createSelectionIdBuilder()
.withMatrixNode(matrixNode, levels)
.createSelectionId();
// ...
if (matrixNode.children) {
// create div element for level
const childDiv = document.createElement("div");
// add to current div
div.appendChild(childDiv);
// create paragraph element to display next
const p = document.createElement("p");
// display level name on paragraph element
const level = levels[matrixNode.level];
p.innerText = level.sources[level.sources.length - 1].displayName;
// add paragraph element to created child div
childDiv.appendChild(p);
// traversing child nodes
matrixNode.children.forEach((node, index) => treeWalker(node, index, levels, childDiv));
}
}
Vytvorte prostredie buttons
na interakciu s vizuálom a zobrazenie kontextovej ponuky pre údajové body matice:
const treeWalker = (matrixNode: DataViewMatrixNode, index: number, levels: DataViewHierarchyLevel[], div: HTMLDivElement) => {
// generate selectionID for each node of matrix
const selectionID: ISelectionID = this.host.createSelectionIdBuilder()
.withMatrixNode(matrixNode, levels)
.createSelectionId();
// create button element
let button = document.createElement("button");
// display node value/name of the button's text
button.innerText = matrixNode.value.toString();
// add event listener on click
button.addEventListener("click", (event) => {
// call select method in the selection manager
this.selectionManager.select(selectionID);
});
// display context menu on click
button.addEventListener("contextmenu", (event) => {
// call showContextMenu method to display context menu on the visual
this.selectionManager.showContextMenu(selectionID, {
x: event.clientX,
y: event.clientY
});
event.preventDefault();
});
div.appendChild(button);
if (matrixNode.children) {
// ...
}
}
Znova vymažte div
prvky pred prvkami vykreslenia:
public update(options: VisualUpdateOptions) {
// ...
const treeWalker = (matrixNode: DataViewMatrixNode, index: number, levels: DataViewHierarchyLevel[], div: HTMLDivElement) => {
// ...
}
// remove old elements
// to better performance use D3js pattern:
// https://d3js.org/#enter-exit
while (this.rowsDiv.firstChild) {
this.rowsDiv.removeChild(this.rowsDiv.firstChild);
}
// create label for row elements
const prow = document.createElement("p");
prow.innerText = "Rows";
this.rowsDiv.appendChild(prow);
while (this.colsDiv.firstChild) {
this.colsDiv.removeChild(this.colsDiv.firstChild);
}
// create label for columns elements
const pcol = document.createElement("p");
pcol.innerText = "Columns";
this.colsDiv.appendChild(pcol);
// render elements for rows
const rowRoot: DataViewMatrixNode = matrixDataView.rows.root;
rowRoot.children.forEach((node, index) => treeWalker(node, index, matrixDataView.rows.levels, this.rowsDiv));
// render elements for columns
const colRoot = matrixDataView.columns.root;
colRoot.children.forEach((node, index) => treeWalker(node, index, matrixDataView.columns.levels, this.colsDiv));
}
Nakoniec by ste mali získať vizuál s kontextovou ponukou: