SignaturePad 100% Pure Beef TypeScript Implementation
(by: Ken Schnell)
I had wanted to implement a SignaturePad for quite some time and came across Wesley Huang's solution- which by the way was terrific. This typescript version here does not have the red tilde ~ that his code had and seems to work quite well so far.
I modified his SignaturePadEditor code as necessary to get rid of the javascript dependency and rely solely on TypeScript. I grabbed Signature Pad Typescript library. made a few modifications but not many and I have included all of them here (there are 4 files in the set, 1 large and 3 small files).
I hate having to have TS code mapper files and the java files for the same functionality this makes no "coding" sense to me and makes the code wet; like that goes against DRY.
In the code below I have made a few modifications, adding options for a border and handling the Image to be the same size as the canvas, if you don't do this your image on update will add a smaller image on top of the existing.
In my effort to be DRYer and also with a BIG SHOUT OUT of Thanks to @VolkanCeylan for this framework and many others for their code sharing I am posting the entire implementation here.
There are a total of 5 Files that you will need to have.
- SignatureEditor.ts
- Bezier.ts
- Pad.ts
- Point.ts
- Throttle.ts
//=================================================================================================== // // FILE: SignatureEditor.ts // // Code mostly from @Wezmeg // Modified for pure Typescript by Ken Schnell //===================================================================================================
namespace MyProjects.MyModule {
@Serenity.Decorators.element('<div />')
@Serenity.Decorators.registerEditor([Serenity.IGetEditValue, Serenity.ISetEditValue])
export class SignatureEditor extends Serenity.Widget<SignatureEditorOptions>
implements Serenity.IGetEditValue, Serenity.ISetEditValue {
private signaturePad: any;
private clearDiv: string = "<div class='s-pad' height='30px' align='right' style='padding-left: 20px;' >";
constructor(div: JQuery, options: SignatureEditorOptions) {
super(div, options);
var CanvasId = 'sign_' + this.uniqueName;
let canvas = $('<canvas />').attr('id', CanvasId);
this.element.append(canvas);
this.signaturePad = new SignaturePad.Pad(document.querySelector('canvas'));
let clearButton = $('<button />').attr('id', 'clearsign_' + this.uniqueName).html('<i class="fa fa-eraser"></i>');
clearButton.on('click', (e) => {
e.preventDefault();
this.signaturePad.clear();
});
this.element.append(this.clearDiv);
this.element.append(clearButton);
this.element.append("</div>");
}
public get value(): string {
return this.get_value();
}
protected get_value(): string {
return this.signaturePad.toDataURL();
}
public set value(value: string) {
this.set_value(value);
}
protected set_value(value: string): void {
this.signaturePad.fromDataURL(value);
}
setEditValue(source: any, property: Serenity.PropertyItem): void {
this.value = source[property.name];
}
getEditValue(property: Serenity.PropertyItem, target: any): void {
target[property.name] = this.value;
}
}
export interface SignatureEditorOptions {
}
}
// Code Below comes from // https://github.com/szimek/signature_pad // //
// Options for Border , and Image Create (matched canvas size) added by Ken Schnell. //
//=================================================================================================== // // FILE: Bezier.ts // //===================================================================================================
namespace SignaturePad {
export class Bezier {
public static fromPoints(points: Point[], widths: { start: number, end: number }): Bezier {
const c2 = this.calculateControlPoints(points[0], points[1], points[2]).c2;
const c3 = this.calculateControlPoints(points[1], points[2], points[3]).c1;
return new Bezier(points[1], c2, c3, points[2], widths.start, widths.end);
}
private static calculateControlPoints(
s1: IBasicPoint,
s2: IBasicPoint,
s3: IBasicPoint,
): {
c1: IBasicPoint,
c2: IBasicPoint,
} {
const dx1 = s1.x - s2.x;
const dy1 = s1.y - s2.y;
const dx2 = s2.x - s3.x;
const dy2 = s2.y - s3.y;
const m1 = { x: (s1.x + s2.x) / 2.0, y: (s1.y + s2.y) / 2.0 };
const m2 = { x: (s2.x + s3.x) / 2.0, y: (s2.y + s3.y) / 2.0 };
const l1 = Math.sqrt((dx1 * dx1) + (dy1 * dy1));
const l2 = Math.sqrt((dx2 * dx2) + (dy2 * dy2));
const dxm = (m1.x - m2.x);
const dym = (m1.y - m2.y);
const k = l2 / (l1 + l2);
const cm = { x: m2.x + (dxm * k), y: m2.y + (dym * k) };
const tx = s2.x - cm.x;
const ty = s2.y - cm.y;
return {
c1: new Point(m1.x + tx, m1.y + ty),
c2: new Point(m2.x + tx, m2.y + ty),
};
}
constructor(
public startPoint: Point,
public control2: IBasicPoint,
public control1: IBasicPoint,
public endPoint: Point,
public startWidth: number,
public endWidth: number,
) { }
// Returns approximated length. Code taken from https://www.lemoda.net/maths/bezier-length/index.html.
public length(): number {
const steps = 10;
let length = 0;
let px;
let py;
for (let i = 0; i <= steps; i += 1) {
const t = i / steps;
const cx = this.point(
t,
this.startPoint.x,
this.control1.x,
this.control2.x,
this.endPoint.x,
);
const cy = this.point(
t,
this.startPoint.y,
this.control1.y,
this.control2.y,
this.endPoint.y,
);
if (i > 0) {
const xdiff = cx - (px as number);
const ydiff = cy - (py as number);
length += Math.sqrt((xdiff * xdiff) + (ydiff * ydiff));
}
px = cx;
py = cy;
}
return length;
}
// Calculate parametric value of x or y given t and the four point coordinates of a cubic bezier curve.
private point(t: number, start: number, c1: number, c2: number, end: number): number {
return (start * (1.0 - t) * (1.0 - t) * (1.0 - t))
+ (3.0 * c1 * (1.0 - t) * (1.0 - t) * t)
+ (3.0 * c2 * (1.0 - t) * t * t)
+ (end * t * t * t);
}
}
}
//=================================================================================================== // // FILE: Pad.ts // //=================================================================================================== /*
- http://corner.squareup.com/2012/07/smoother-signatures.html
- Implementation of interpolation using cubic Bézier curves is taken from:
- http://www.benknowscode.com/2012/09/path-interpolation-using-cubic-bezier_9742.html
- Algorithm for approximated length of a Bézier curve is taken from:
- http://www.lemoda.net/maths/bezier-length/index.html
*/
namespace SignaturePad {
export interface IOptions {
dotSize?: number | (() => number);
minWidth?: number;
maxWidth?: number;
minDistance?: number;
backgroundColor?: string;
penColor?: string;
throttle?: number;
borderWidth?: number; //lineWidth
borderColor?: string; // strokeStyle = "#FF0000";
velocityFilterWeight?: number;
onBegin?: (event: MouseEvent | Touch) => void;
onEnd?: (event: MouseEvent | Touch) => void;
}
export interface IPointGroup {
color: string;
points: IBasicPoint[];
}
export interface Window {
PointerEvent: typeof PointerEvent;
}
export class Pad {
// Public stuff
public dotSize: number | (() => number);
public minWidth: number;
public maxWidth: number;
public minDistance: number;
public backgroundColor: string;
public penColor: string;
public throttle: number;
public borderWidth: number; //lineWidth
public borderColor: string; // strokeStyle = "#FF0000";
public velocityFilterWeight: number;
public onBegin?: (event: MouseEvent | Touch) => void;
public onEnd?: (event: MouseEvent | Touch) => void;
// Private stuff
/* tslint:disable: variable-name */
private _ctx: CanvasRenderingContext2D;
private _mouseButtonDown: boolean;
private _isEmpty: boolean;
private _lastPoints: Point[]; // Stores up to 4 most recent points; used to generate a new curve
private _data: IPointGroup[]; // Stores all points in groups (one group per line or dot)
private _lastVelocity: number;
private _lastWidth: number;
private _strokeMoveUpdate: (event: MouseEvent | Touch) => void;
/* tslint:enable: variable-name */
constructor(private canvas: HTMLCanvasElement, private options: IOptions = {}) {
this.velocityFilterWeight = options.velocityFilterWeight || 0.7;
this.minWidth = options.minWidth || 0.5;
this.maxWidth = options.maxWidth || 2.5;
this.throttle = ('throttle' in options ? options.throttle : 16) as number; // in milisecondss
this.minDistance = ('minDistance' in options ? options.minDistance : 5) as number; // in pixels
this.borderWidth = options.borderWidth || 0;
this.borderColor = options.borderColor || '#FF0000';
if (this.throttle) {
this._strokeMoveUpdate = throttle(Pad.prototype._strokeUpdate, this.throttle);
} else {
this._strokeMoveUpdate = Pad.prototype._strokeUpdate;
}
// this: Pad
this.dotSize = options.dotSize || function (this: Pad) // ( this: Pad)
{
return (this.minWidth + this.maxWidth) / 2;
};
this.penColor = options.penColor || 'black';
this.backgroundColor = options.backgroundColor || 'rgba(0,0,0,0)';
this.onBegin = options.onBegin;
this.onEnd = options.onEnd;
this._ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
this.clear();
// Enable mouse and touch event handlers
this.on();
}
public clear(): void {
const ctx = this._ctx;
const canvas = this.canvas;
// Clear canvas using background color
ctx.fillStyle = this.backgroundColor;
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.globalCompositeOperation = "destination-over";
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.globalCompositeOperation = "source-over";
ctx.lineWidth = this.borderWidth;
ctx.strokeStyle = this.borderColor;
ctx.strokeRect(0, 0, canvas.width, canvas.height);
this._data = [];
this._reset();
this._isEmpty = true;
}
public fromDataURL(
dataUrl: string,
options: { ratio?: number, width?: number, height?: number } = {},
callback?: (error?: ErrorEvent) => void,
): void {
const ratio = options.ratio || window.devicePixelRatio || 1;
const width = options.width || (this.canvas.width / ratio);
const height = options.height || (this.canvas.height / ratio);
const image = new Image(width, height);
this._reset();
image.onload = () => {
this._ctx.drawImage(image, 0, 0, image.width, image.height, 0, 0, width, height);
if (callback) { callback(); }
};
image.onerror = (error) => {
if (callback) { callback(<ErrorEvent>error); }
};
image.src = dataUrl;
this._isEmpty = false;
}
public toDataURL(type = 'image/png', encoderOptions?: number) {
switch (type) {
case 'image/svg+xml':
return this._toSVG();
default:
return this.canvas.toDataURL(type, encoderOptions);
}
}
public on(): void {
// Disable panning/zooming when touching canvas element
this.canvas.style.touchAction = 'none';
this.canvas.style.msTouchAction = 'none';
// PointerEvent changed below 3-6-2020 Ken
if (window.onpointerenter) {
this._handlePointerEvents();
} else {
this._handleMouseEvents();
if ('ontouchstart' in window) {
this._handleTouchEvents();
}
}
}
public off(): void {
// Enable panning/zooming when touching canvas element
this.canvas.style.touchAction = 'auto';
this.canvas.style.msTouchAction = 'auto';
this.canvas.removeEventListener('pointerdown', this._handleMouseDown);
this.canvas.removeEventListener('pointermove', this._handleMouseMove);
document.removeEventListener('pointerup', this._handleMouseUp);
this.canvas.removeEventListener('mousedown', this._handleMouseDown);
this.canvas.removeEventListener('mousemove', this._handleMouseMove);
document.removeEventListener('mouseup', this._handleMouseUp);
this.canvas.removeEventListener('touchstart', this._handleTouchStart);
this.canvas.removeEventListener('touchmove', this._handleTouchMove);
this.canvas.removeEventListener('touchend', this._handleTouchEnd);
}
public isEmpty(): boolean {
return this._isEmpty;
}
public fromData(pointGroups: IPointGroup[]): void {
this.clear();
this._fromData(
pointGroups,
({ color, curve }) => this._drawCurve({ color, curve }),
({ color, point }) => this._drawDot({ color, point }),
);
this._data = pointGroups;
}
public toData(): IPointGroup[] {
return this._data;
}
// Event handlers
private _handleMouseDown = (event: MouseEvent): void => {
if (event.which === 1) {
this._mouseButtonDown = true;
this._strokeBegin(event);
}
}
private _handleMouseMove = (event: MouseEvent): void => {
if (this._mouseButtonDown) {
this._strokeMoveUpdate(event);
}
}
private _handleMouseUp = (event: MouseEvent): void => {
if (event.which === 1 && this._mouseButtonDown) {
this._mouseButtonDown = false;
this._strokeEnd(event);
}
}
private _handleTouchStart = (event: TouchEvent): void => {
// Prevent scrolling.
event.preventDefault();
if (event.targetTouches.length === 1) {
const touch = event.changedTouches[0];
this._strokeBegin(touch);
}
}
private _handleTouchMove = (event: TouchEvent): void => {
// Prevent scrolling.
event.preventDefault();
const touch = event.targetTouches[0];
this._strokeMoveUpdate(touch);
}
private _handleTouchEnd = (event: TouchEvent): void => {
const wasCanvasTouched = event.target === this.canvas;
if (wasCanvasTouched) {
event.preventDefault();
const touch = event.changedTouches[0];
this._strokeEnd(touch);
}
}
// Private methods
private _strokeBegin(event: MouseEvent | Touch): void {
const newPointGroup = {
color: this.penColor,
points: [],
};
this._data.push(newPointGroup);
this._reset();
this._strokeUpdate(event);
if (typeof this.onBegin === 'function') {
this.onBegin(event);
}
}
private _strokeUpdate(event: MouseEvent | Touch): void {
const x = event.clientX;
const y = event.clientY;
const point = this._createPoint(x, y);
const lastPointGroup = this._data[this._data.length - 1];
const lastPoints = lastPointGroup.points;
const lastPoint = lastPoints.length > 0 && lastPoints[lastPoints.length - 1];
const isLastPointTooClose = lastPoint ? point.distanceTo(lastPoint) <= this.minDistance : false;
const color = lastPointGroup.color;
// Skip this point if it's too close to the previous one
if (!lastPoint || !(lastPoint && isLastPointTooClose)) {
const curve = this._addPoint(point);
if (!lastPoint) {
this._drawDot({ color, point });
} else if (curve) {
this._drawCurve({ color, curve });
}
lastPoints.push({
time: point.time,
x: point.x,
y: point.y,
});
}
}
private _strokeEnd(event: MouseEvent | Touch): void {
this._strokeUpdate(event);
if (typeof this.onEnd === 'function') {
this.onEnd(event);
}
}
private _handlePointerEvents(): void {
this._mouseButtonDown = false;
this.canvas.addEventListener('pointerdown', this._handleMouseDown);
this.canvas.addEventListener('pointermove', this._handleMouseMove);
document.addEventListener('pointerup', this._handleMouseUp);
}
private _handleMouseEvents(): void {
this._mouseButtonDown = false;
this.canvas.addEventListener('mousedown', this._handleMouseDown);
this.canvas.addEventListener('mousemove', this._handleMouseMove);
document.addEventListener('mouseup', this._handleMouseUp);
}
private _handleTouchEvents(): void {
this.canvas.addEventListener('touchstart', this._handleTouchStart);
this.canvas.addEventListener('touchmove', this._handleTouchMove);
this.canvas.addEventListener('touchend', this._handleTouchEnd);
}
// Called when a new line is started
private _reset(): void {
this._lastPoints = [];
this._lastVelocity = 0;
this._lastWidth = (this.minWidth + this.maxWidth) / 2;
this._ctx.fillStyle = this.penColor;
}
private _createPoint(x: number, y: number): Point {
const rect = this.canvas.getBoundingClientRect();
return new Point(
x - rect.left,
y - rect.top,
new Date().getTime(),
);
}
// Add point to _lastPoints array and generate a new curve if there are enough points (i.e. 3)
private _addPoint(point: Point): Bezier | null {
const { _lastPoints } = this;
_lastPoints.push(point);
if (_lastPoints.length > 2) {
// To reduce the initial lag make it work with 3 points
// by copying the first point to the beginning.
if (_lastPoints.length === 3) {
_lastPoints.unshift(_lastPoints[0]);
}
// _points array will always have 4 points here.
const widths = this._calculateCurveWidths(_lastPoints[1], _lastPoints[2]);
const curve = Bezier.fromPoints(_lastPoints, widths);
// Remove the first element from the list, so that there are no more than 4 points at any time.
_lastPoints.shift();
return curve;
}
return null;
}
private _calculateCurveWidths(startPoint: Point, endPoint: Point): { start: number, end: number } {
const velocity = (this.velocityFilterWeight * endPoint.velocityFrom(startPoint))
+ ((1 - this.velocityFilterWeight) * this._lastVelocity);
const newWidth = this._strokeWidth(velocity);
const widths = {
end: newWidth,
start: this._lastWidth,
};
this._lastVelocity = velocity;
this._lastWidth = newWidth;
return widths;
}
private _strokeWidth(velocity: number): number {
return Math.max(this.maxWidth / (velocity + 1), this.minWidth);
}
private _drawCurveSegment(x: number, y: number, width: number): void {
const ctx = this._ctx;
ctx.moveTo(x, y);
ctx.arc(x, y, width, 0, 2 * Math.PI, false);
this._isEmpty = false;
}
private _drawCurve({ color, curve }: { color: string, curve: Bezier }): void {
const ctx = this._ctx;
const widthDelta = curve.endWidth - curve.startWidth;
// '2' is just an arbitrary number here. If only lenght is used, then
// there are gaps between curve segments :/
const drawSteps = Math.floor(curve.length()) * 2;
ctx.beginPath();
ctx.fillStyle = color;
for (let i = 0; i < drawSteps; i += 1) {
// Calculate the Bezier (x, y) coordinate for this step.
const t = i / drawSteps;
const tt = t * t;
const ttt = tt * t;
const u = 1 - t;
const uu = u * u;
const uuu = uu * u;
let x = uuu * curve.startPoint.x;
x += 3 * uu * t * curve.control1.x;
x += 3 * u * tt * curve.control2.x;
x += ttt * curve.endPoint.x;
let y = uuu * curve.startPoint.y;
y += 3 * uu * t * curve.control1.y;
y += 3 * u * tt * curve.control2.y;
y += ttt * curve.endPoint.y;
const width = curve.startWidth + (ttt * widthDelta);
this._drawCurveSegment(x, y, width);
}
ctx.closePath();
ctx.fill();
}
private _drawDot({ color, point }: { color: string, point: IBasicPoint }): void {
const ctx = this._ctx;
const width = typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
ctx.beginPath();
this._drawCurveSegment(point.x, point.y, width);
ctx.closePath();
ctx.fillStyle = color;
ctx.fill();
}
private _fromData(
pointGroups: IPointGroup[],
drawCurve: Pad['_drawCurve'],
drawDot: Pad['_drawDot'],
): void {
for (const group of pointGroups) {
const { color, points } = group;
if (points.length > 1) {
for (let j = 0; j < points.length; j += 1) {
const basicPoint = points[j];
const point = new Point(basicPoint.x, basicPoint.y, basicPoint.time);
// All points in the group have the same color, so it's enough to set
// penColor just at the beginning.
this.penColor = color;
if (j === 0) {
this._reset();
}
const curve = this._addPoint(point);
if (curve) {
drawCurve({ color, curve });
}
}
} else {
this._reset();
drawDot({
color,
point: points[0],
});
}
}
}
private _toSVG(): string {
const pointGroups = this._data;
const ratio = Math.max(window.devicePixelRatio || 1, 1);
const minX = 0;
const minY = 0;
const maxX = this.canvas.width / ratio;
const maxY = this.canvas.height / ratio;
const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
svg.setAttribute('width', this.canvas.width.toString());
svg.setAttribute('height', this.canvas.height.toString());
this._fromData(
pointGroups,
({ color, curve }: { color: string, curve: Bezier }) => {
const path = document.createElement('path');
// Need to check curve for NaN values, these pop up when drawing
// lines on the canvas that are not continuous. E.g. Sharp corners
// or stopping mid-stroke and than continuing without lifting mouse.
/* eslint-disable no-restricted-globals */
if (!isNaN(curve.control1.x) &&
!isNaN(curve.control1.y) &&
!isNaN(curve.control2.x) &&
!isNaN(curve.control2.y)) {
const attr = `M ${curve.startPoint.x.toFixed(3)},${curve.startPoint.y.toFixed(3)} `
+ `C ${curve.control1.x.toFixed(3)},${curve.control1.y.toFixed(3)} `
+ `${curve.control2.x.toFixed(3)},${curve.control2.y.toFixed(3)} `
+ `${curve.endPoint.x.toFixed(3)},${curve.endPoint.y.toFixed(3)}`;
path.setAttribute('d', attr);
path.setAttribute('stroke-width', (curve.endWidth * 2.25).toFixed(3));
path.setAttribute('stroke', color);
path.setAttribute('fill', 'none');
path.setAttribute('stroke-linecap', 'round');
svg.appendChild(path);
}
/* eslint-enable no-restricted-globals */
},
({ color, point }: { color: string, point: IBasicPoint }) => {
const circle = document.createElement('circle');
const dotSize = typeof this.dotSize === 'function' ? this.dotSize() : this.dotSize;
circle.setAttribute('r', dotSize.toString());
circle.setAttribute('cx', point.x.toString());
circle.setAttribute('cy', point.y.toString());
circle.setAttribute('fill', color);
svg.appendChild(circle);
},
);
const prefix = 'data:image/svg+xml;base64,';
const header = '<svg'
+ ' xmlns="http://www.w3.org/2000/svg"'
+ ' xmlns:xlink="http://www.w3.org/1999/xlink"'
+ ` viewBox="${minX} ${minY} ${maxX} ${maxY}"`
+ ` width="${maxX}"`
+ ` height="${maxY}"`
+ '>';
let body = svg.innerHTML;
// IE hack for missing innerHTML property on SVGElement
if (body === undefined) {
const dummy = document.createElement('dummy');
const nodes = svg.childNodes;
dummy.innerHTML = '';
// tslint:disable-next-line: prefer-for-of
for (let i = 0; i < nodes.length; i += 1) {
dummy.appendChild(nodes[i].cloneNode(true));
}
body = dummy.innerHTML;
}
const footer = '</svg>';
const data = header + body + footer;
return prefix + btoa(data);
}
}
}
//=================================================================================================== // // FILE: Point.ts // //===================================================================================================
namespace SignaturePad {
//Interface for point data structure used e.g. in SignaturePad#fromData method
export interface IBasicPoint {
x: number;
y: number;
time: number;
}
export class Point implements IBasicPoint {
public time: number;
constructor(public x: number, public y: number, time?: number) {
this.time = time || Date.now();
}
public distanceTo(start: IBasicPoint): number {
return Math.sqrt(Math.pow(this.x - start.x, 2) + Math.pow(this.y - start.y, 2));
}
public equals(other: IBasicPoint): boolean {
return this.x === other.x && this.y === other.y && this.time === other.time;
}
public velocityFrom(start: IBasicPoint): number {
return (this.time !== start.time) ? this.distanceTo(start) / (this.time - start.time) : 0;
}
}
}
//=================================================================================================== // // FILE: Throttle.ts // //===================================================================================================
// Slightly simplified version of http://stackoverflow.com/a/27078401/815507
namespace SignaturePad {
export function throttle(fn: (...args: any[]) => any, wait = 250) {
let previous = 0;
let timeout: number | null = null;
let result: any;
let storedContext: any;
let storedArgs: any[];
const later = () => {
previous = Date.now();
timeout = null;
result = fn.apply(storedContext, storedArgs);
if (!timeout) {
storedContext = null;
storedArgs = [];
}
};
return function (this: any, ...args: any[]) {
const now = Date.now();
const remaining = wait - (now - previous);
storedContext = this;
storedArgs = args;
if (remaining <= 0 || remaining > wait) {
if (timeout) {
clearTimeout(timeout);
timeout = null;
}
previous = now;
result = fn.apply(storedContext, storedArgs);
if (!timeout) {
storedContext = null;
storedArgs = [];
}
} else if (!timeout) {
timeout = window.setTimeout(later, remaining);
}
return result;
};
}
}
========================================================================
CREATE A COLUMN IN YOUR DATABASE XYZROW_TABLE Signature nvarchar(max)
========================================================================
==========================================================================
SERENITY FRAMEWORK IMPLEMENTATIONS: NOTICE THE EDITOR ATTRIBUTE [SignatureEditor] ABOVE THE COLUMN THE EDITOR ATTRIBUTE IS WHAT MAKES TIME TRAVEL (SIGNATURE PAD) POSSIBLE
==========================================================================
MyXYZRow.cs
[SignatureEditor]
[DisplayName("Signature")]
public String Signature
{
get { return Fields.Signature[this]; }
set { Fields.Signature[this] = value; }
}
XYZForm.cs
[SignatureEditor]
public String Signature { get; set; }
XYZColumn.cs
[SignatureEditor]
public String Signature { get; set; }
XYZDialog.ts
// I am doing this as eventually my Image will be an image in the screen instead of text.
// As soon as I implement the StreamField
protected getSlickOptions(): Slick.GridOptions {
let opt = super.getSlickOptions();
opt.rowHeight = 150;
return opt;
}
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