d3 v4 and selectionManager

Resolver I

8 years ago

Alright, i have found out how d3 selections work:

private chartSelection: d3.Selection<d3.BaseType, ChartDataPoint, d3.BaseType, any>;
private svg: d3.Selection<SVGElement, {}, HTMLElement, any>;
private g: d3.Selection<SVGElement, {}, HTMLElement, any>;

But the problem seems to be something else because the syncSelectionState(): void

dont work (no Errors are shown). That means i can not click on a specific datapoint.

It also seems to be that by installing the newest version of d3 ([email protected] @types/[email protected]) it also installed a different version of typescript (there is are new typescript folder in my node_modules). So the syntax changed a bit.

//For e.g. instead of 

this.svg.attr({
   width: width,
   height: height
});

//I now have to write it like this:

this.svg
   .attr('width', width)
   .attr('height', height);

However, the selectionIds actually exist for each datapoint (I can for e.g. change the color of each datapoint over formatting options)

this.datapoint.selectionId.getSelector()

I cant understand why the selectionManager wont work, where it should be working now.

Here is my whole code for download: MyGoogleDrive

Is there someone who is also using d3 v4 and managed to get selectionManager working?

I would be very thankful!

az2451

Resolver I

8 years ago

Hi Ignat,

works fine for me.

Thank you very much!

For everyone who has the same issue follow these steps:

1. STEP: Change the selection datatype to the new d3 v4 format to something like this:

private chartSelection: d3.Selection<d3.BaseType, ChartDataPoint, d3.BaseType, any>; // Needed to display datapoints
private svg: d3.Selection<SVGElement, {}, HTMLElement, any>; // SVG-Element (Container)
private g: d3.Selection<SVGElement, {}, HTMLElement, any>; // SVG-Element (group 'g')

2. STEP: Add <SVGElement> when calling the constructor:

constructor(options: VisualConstructorOptions) {
			
            this.host = options.host;

            this.selectionManager = options.host.createSelectionManager();
            this.selectionManager.registerOnSelectCallback(() => {
                this.syncSelectionState(this.chartSelection, this.selectionManager.getSelectionIds() as ISelectionId[]);
            });

           
            this.svg = d3.select(options.element).append<SVGElement>('svg');
	    this.g = this.svg.append<SVGElement>('g');
            
}

3. STEP: When creating the datapoints, you have to add the d3 event directly to it. That means if your code look something similar like this:

            // Create a SVG-Element (datapoints)
            this.chartSelection = this.g
	         .append('g')
                 .selectAll('.dot')
                 .data(viewModel.dataPoints);

            this.chartSelection
                .enter()
                .append('circle')
                .attr('r', 5)
                .merge(this.chartSelection)
                .classed('dot', true)
                .attr('cx', d => x(<number>d.gesamtKosten))
                .attr('cy', d => y(<number>d.anzahlKostenstellen))
                .attr('fill', d => d.color);

this.syncSelectionState(
                this.chartSelection,
                this.selectionManager.getSelectionIds() as ISelectionId[]
            );

            this.chartSelection.on('click', (d) => {
                // Allow selection only if the visual is rendered in a view that supports interactivity (e.g. Report)
                if (this.host.allowInteractions) {
                    const isCrtlPressed: boolean = (d3.event as MouseEvent).ctrlKey;
                    this.selectionManager
                        .select(d.selectionId, isCrtlPressed)
                        .then((ids: ISelectionId[]) => {
                            this.syncSelectionState(this.chartSelection, ids);
                        });

                    (<Event>d3.event).stopPropagation();
                }
            });

            this.chartSelection
                .exit()
                .remove();

            // Clear selection when clicking outside a dot
            this.svg.on('click', (d) => {
                if (this.host.allowInteractions) {
                    this.selectionManager
                        .clear()
                        .then(() => {
                            this.syncSelectionState(this.chartSelection, []);
                        });
                }
            });

Change it to this:

                 // Create a SVG-Element (datapoints)
	         this.chartSelection = this.g
		     .append('g')
                     .selectAll('.dot')
                     .data(viewModel.dataPoints);

                this.chartSelection
                     .enter()
                     .append('circle')
                     .on('click', (d) => {
                       // Allow selection only if the visual is rendered in a view that supports interactivity (e.g. Report)
                       if (this.host.allowInteractions) {
                        const isCrtlPressed: boolean = (d3.event as MouseEvent).ctrlKey;
                        this.selectionManager
                            .select(d.selectionId, isCrtlPressed)
                            .then((ids: ISelectionId[]) => {
                                this.syncSelectionState(this.g.selectAll(".dot"), ids);
                            });
    
                        (<Event>d3.event).stopPropagation();
                    }
                })
                .attr('r', 5)
                .merge(this.chartSelection)
                .classed('dot', true)
                .attr('cx', d => x(<number>d.gesamtKosten))
                .attr('cy', d => y(<number>d.anzahlKostenstellen))
                .attr('fill', d => d.color);

            this.syncSelectionState(
                this.g.selectAll(".dot"),
                this.selectionManager.getSelectionIds() as ISelectionId[]
            );


            this.chartSelection
                .exit()
                .remove();

            // Clear selection when clicking outside a dot
            this.svg.on('click', (d) => {
                if (this.host.allowInteractions) {
                    this.selectionManager
                        .clear()
                        .then(() => {
                            this.syncSelectionState(this.chartSelection, []);
                        });
                }
            });

4. STEP: Edit the syncSelectionState():

private syncSelectionState(
		
            selection: d3.Selection<d3.BaseType, any, d3.BaseType, any>,
            selectionIds: ISelectionId[]
			
): void { ... }

I hope this helps!

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