Add a speed field editor

editor/extension.ts

@@ -4,6 +4,7 @@
 import { deployCoreAsync, initAsync } from "./deploy";
 import { FieldPorts } from "./field_ports";
 import { FieldImages } from "./field_images";
+import {FieldSpeed} from "./field_speed";
 
 pxt.editor.initExtensionsAsync = function (opts: pxt.editor.ExtensionOptions): Promise<pxt.editor.ExtensionResult> {
     pxt.debug('loading pxt-ev3 target extensions...')
@@ -15,6 +16,9 @@ pxt.editor.initExtensionsAsync = function (opts: pxt.editor.ExtensionOptions): P
         }, {
             selector: "images",
             editor: FieldImages
+        }, {
+            selector: "speed",
+            editor: FieldSpeed
         }],
         deployCoreAsync
     };

editor/field_speed.ts

@@ -0,0 +1,92 @@
+/// <reference path="../node_modules/pxt-core/localtypings/blockly.d.ts"/>
+/// <reference path="../node_modules/pxt-core/built/pxtsim.d.ts"/>
+
+export interface FieldSpeedOptions extends Blockly.FieldCustomOptions {
+    min?: string;
+    max?: string;
+    label?: string;
+}
+
+export class FieldSpeed extends Blockly.FieldSlider implements Blockly.FieldCustom {
+    public isFieldCustom_ = true;
+
+    private params: any;
+
+    private speedSVG: SVGElement;
+    private circleBar: SVGCircleElement;
+    private reporter: SVGTextElement;
+
+    /**
+     * Class for a color wheel field.
+     * @param {number|string} value The initial content of the field.
+     * @param {Function=} opt_validator An optional function that is called
+     *     to validate any constraints on what the user entered.  Takes the new
+     *     text as an argument and returns either the accepted text, a replacement
+     *     text, or null to abort the change.
+     * @extends {Blockly.FieldNumber}
+     * @constructor
+     */
+    constructor(value_: any, params: FieldSpeedOptions, opt_validator?: Function) {
+        super(String(value_), '-100', '100', null, '10', 'Speed', opt_validator);
+        this.params = params;
+        if (this.params['min']) this.min_ = parseFloat(this.params.min);
+        if (this.params['max']) this.max_ = parseFloat(this.params.max);
+        if (this.params['label']) this.labelText_ = this.params.label;
+
+        (this as any).sliderColor_ = '#a8aaa8';
+    }
+
+    createLabelDom_(labelText: string) {
+        var labelContainer = document.createElement('div');
+        this.speedSVG = document.createElementNS("http://www.w3.org/2000/svg", "svg") as SVGGElement;
+        pxsim.svg.hydrate(this.speedSVG, {
+            viewBox: "0 0 200 100"
+        });
+
+        labelContainer.appendChild(this.speedSVG);
+
+        const outerCircle = pxsim.svg.child(this.speedSVG, "circle", {
+            'stroke-dasharray': '565.48', 'stroke-dashoffset': '0',
+            'cx': 100, 'cy': 100, 'r': '90', 'style': `fill:transparent; transition: stroke-dashoffset 0.1s linear;`,
+            'stroke': '#a8aaa8', 'stroke-width': '1rem'
+        }) as SVGCircleElement;
+        this.circleBar = pxsim.svg.child(this.speedSVG, "circle", {
+            'stroke-dasharray': '565.48', 'stroke-dashoffset': '0',
+            'cx': 100, 'cy': 100, 'r': '90', 'style': `fill:transparent; transition: stroke-dashoffset 0.1s linear;`,
+            'stroke': '#f12a21', 'stroke-width': '1rem'
+        }) as SVGCircleElement;
+
+        this.reporter = pxsim.svg.child(this.speedSVG, "text", {
+            'x': 100, 'y': 80,
+            'text-anchor': 'middle', 'alignment-baseline': 'middle',
+            'style': 'font-size: 50px',
+            'class': 'sim-text inverted number'
+        }) as SVGTextElement;
+
+        // labelContainer.setAttribute('class', 'blocklyFieldSliderLabel');
+        var readout = document.createElement('span');
+        readout.setAttribute('class', 'blocklyFieldSliderReadout');
+        // var label = document.createElement('span');
+        // label.setAttribute('class', 'blocklyFieldSliderLabelText');
+        // label.innerHTML = labelText;
+        // labelContainer.appendChild(label);
+        // labelContainer.appendChild(readout);
+        return [labelContainer, readout];
+    };
+
+    setReadout_(readout: Element, value: string) {
+        this.updateSpeed(parseFloat(value));
+        // Update reporter
+        this.reporter.textContent = `${value}`;
+    }
+
+    private updateSpeed(speed: number) {
+        speed = Math.abs(speed);
+        speed = speed / 100 * 50;
+        speed += 50;
+        let c = Math.PI * (90 * 2);
+        let pct = ((100 - speed) / 100) * c;
+        this.circleBar.setAttribute('stroke-dashoffset', `${pct}`);
+    }
+
+}