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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,9 @@ export class DonutBuilderService extends D3VisualizationBuilderService<
private static readonly DONUT_ARC_CLASS: string = 'donut-arc';

private static readonly DONUT_PADDING_PX: number = 10;
private static readonly MAX_DIAMETER_FOR_DONUT: number = 320;
private static readonly MAX_FONT_SIZE_FOR_TITLE: number = 15;
private static readonly MAX_FONT_SIZE_FOR_VALUE: number = 64;

public constructor(
d3: D3UtilService,
Expand Down Expand Up @@ -69,11 +72,19 @@ export class DonutBuilderService extends D3VisualizationBuilderService<

visualizationContainer
.select(selector(DonutBuilderService.DONUT_VALUE_TITLE_CLASS))
.attr('transform', `translate(0,-${dimensions.donutInnerRadius / 2})`);
.attr('transform', `translate(0,-${dimensions.donutInnerRadius / 2})`)
.style(
'font-size',
Math.min(Math.floor(dimensions.donutInnerRadius / 8), DonutBuilderService.MAX_FONT_SIZE_FOR_TITLE)
);

visualizationContainer
.select(selector(DonutBuilderService.DONUT_VALUE_CLASS))
.attr('transform', `translate(0,-${dimensions.donutInnerRadius / 4})`);
.attr('transform', `translate(0,-${dimensions.donutInnerRadius / 4})`)
.style(
'font-size',
Math.min(Math.floor(dimensions.donutInnerRadius / 2), DonutBuilderService.MAX_FONT_SIZE_FOR_VALUE)
);
}

protected drawVisualization(
Expand Down Expand Up @@ -127,12 +138,14 @@ export class DonutBuilderService extends D3VisualizationBuilderService<
protected decorateDimensions(calculatedDimensions: ChartDimensions): DonutDimensions {
let diameter = Math.min(calculatedDimensions.visualizationWidth, calculatedDimensions.visualizationHeight);

diameter -= DonutBuilderService.DONUT_PADDING_PX;

// Reduce visualization area to diameter
calculatedDimensions.visualizationWidth = diameter;
calculatedDimensions.visualizationHeight = diameter;

diameter -= DonutBuilderService.DONUT_PADDING_PX;
diameter =
diameter > DonutBuilderService.MAX_DIAMETER_FOR_DONUT ? DonutBuilderService.MAX_DIAMETER_FOR_DONUT : diameter;

return {
...calculatedDimensions,
donutOuterRadius: diameter / 2,
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -9,12 +9,10 @@

.donut-svg {
.donut-value-title {
font-size: 15px;
dominant-baseline: hanging;
}

.donut-value {
font-size: 64px;
dominant-baseline: hanging;
}
}
Expand Down