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implementation of a canvas texture renderer, for Caleydo/lineup#35 and …
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| @import '../vars'; | ||
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| ##{$lu-css_prefix}-texture-container{ | ||
| display: flex; | ||
| overflow: hidden; | ||
| img{ | ||
| margin-right: 5px; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| import EngineRanking from './EngineRanking'; | ||
| import {IDataRow} from '../../provider/ADataProvider'; | ||
| import NumbersColumn from '../../model/NumbersColumn'; | ||
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| export interface ITextureRenderer{ | ||
| update(rankings: EngineRanking[], localData: IDataRow[][]): void; | ||
| destroy(): void; | ||
| show(): void; | ||
| hide(): void; | ||
| } | ||
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| export default class CanvasTextureRenderer implements ITextureRenderer { | ||
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| readonly node: HTMLElement; | ||
| readonly canvas: any; | ||
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| constructor(parent: Element) { | ||
| this.node = parent.ownerDocument.createElement('main'); | ||
| this.node.id = 'lu-texture-container'; | ||
| parent.appendChild(this.node); | ||
| this.canvas = parent.ownerDocument.createElement('canvas'); | ||
| } | ||
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| update(rankings: EngineRanking[], localData: IDataRow[][]) { | ||
| this.node.innerHTML = ''; //remove all children | ||
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| rankings.forEach((r, i) => { | ||
| const grouped = r.groupData(localData[i]); | ||
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| r.ranking.flatColumns.forEach((column) => { | ||
| let newElement = null; | ||
| if (column instanceof NumbersColumn) { | ||
| const col = <NumbersColumn>column; | ||
| newElement = this.generateImage(grouped.map((value) => { | ||
| return (<any>value).v[(<any>col.desc).column]; | ||
| }), col.getRawColorScale()) | ||
| } else { | ||
| newElement = this.node.ownerDocument.createElement('img'); | ||
| } | ||
| newElement.style.width = column.getWidth() + 'px'; | ||
| this.node.appendChild(newElement); | ||
| }); | ||
| }); | ||
| } | ||
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| private generateImage(data: any[][], colorScale: any){ | ||
| let height = data.length; | ||
| let width = 0; | ||
| if(height > 0){ | ||
| width = data[0].length; | ||
| } | ||
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| this.canvas.setAttribute('height', '' + height); | ||
| this.canvas.setAttribute('width', '' + width); | ||
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| const ctx = <CanvasRenderingContext2D>this.canvas.getContext('2d'); | ||
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| data.forEach((row, y) => { | ||
| row.forEach((value, x) => { | ||
| ctx.fillStyle = colorScale(value); | ||
| ctx.fillRect(x, y, 1, 1); | ||
| }); | ||
| }); | ||
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| ctx.save(); | ||
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| const image = this.node.ownerDocument.createElement('img'); | ||
| image.src = this.canvas.toDataURL(); | ||
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| return image; | ||
| } | ||
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| destroy() { | ||
| this.node.remove(); | ||
| } | ||
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| show() { | ||
| this.node.classList.remove('hidden'); | ||
| } | ||
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| hide() { | ||
| this.node.classList.add('hidden'); | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| import CanvasTextureRenderer from '../engine/CanvasTextureRenderer'; | ||
| import DataProvider from '../../provider/ADataProvider'; | ||
| import {AEventDispatcher} from '../../utils'; | ||
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| export default class TextureRenderer extends AEventDispatcher { | ||
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| private readonly renderer: CanvasTextureRenderer; | ||
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| constructor(parent: HTMLElement, public data: DataProvider) { | ||
| super(); | ||
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| this.renderer = new CanvasTextureRenderer(data, parent); | ||
| } | ||
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| get ctx() { | ||
| return this.renderer.ctx; | ||
| } | ||
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| protected createEventList() { | ||
| return super.createEventList(); /*.concat([TaggleRenderer.EVENT_HOVER_CHANGED])*/ | ||
| } | ||
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| destroy() { | ||
| this.renderer.destroy(); | ||
| } | ||
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| update() { | ||
| this.renderer.update(); | ||
| } | ||
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| changeDataStorage(data: DataProvider) { | ||
| this.renderer.changeDataStorage(data); | ||
| this.update(); | ||
| } | ||
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| show() { | ||
| this.renderer.show(); | ||
| } | ||
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| hide() { | ||
| this.renderer.hide(); | ||
| } | ||
| } |