The Signature control integrates with the toolbar and the interaction performed using the change event of the toolbar.
In that, canUndo, canRedo and isEmpty methods were used to enable/disable undo, redo, and clear buttons.
ej.base.enableRipple = true;
var signature = new ej.inputs.Signature({
change: function(args) {
if (!signature.isEmpty()) {
var saveBtn = ej.base.getComponent(document.getElementById("save-option"), 'split-btn');
clearButton();
saveBtn.disabled = false;
}
updateUndoRedo();
}
}, '#signature');
var items = [
{
text: 'Png'
},
{
text: 'Jpg'
},
{
text: 'Svg'
}
];
var toolbarObj = new ej.navigations.Toolbar({
width: '100%',
items: [
{ text: 'Undo', prefixIcon: 'e-icons e-undo', tooltipText: 'Undo (Ctrl + Z)' },
{ text: 'Redo', prefixIcon: 'e-icons e-redo', tooltipText: 'Redo (Ctrl + Y)' },
{ type: 'Separator' },
{ tooltipText: 'Save (Ctrl + S)', type: 'Button', template: '<button id="save-option"></button>' },
{ type: 'Separator' },
{ tooltipText: 'Stroke Color', type: 'Input', template: '<input id="stroke-color" type="color"/>' },
{ type: 'Separator' },
{ tooltipText: 'Background Color', type: 'Input', template: '<input id="bg-color" type="color"/>' },
{ type: 'Separator' },
{ tooltipText: 'Stroke Width', type: 'Input', template: '<input id="stroke-width" type="text"/>' },
{ type: 'Separator' },
{ text: 'Clear', prefixIcon: 'e-sign-icons e-clear', tooltipText: 'Clear' },
{ tooltipText: 'Disabled', type: 'Input', template: new ej.buttons.CheckBox({ label: 'Disabled', checked: false, change: disabledChange}), align: 'Right' }
],
created: function(args) {
var ddl = new ej.dropdowns.DropDownList({
dataSource: [1, 2, 3, 4, 5],
width: '120',
value: 1,
change: function(args) {
signature.maxStrokeWidth = args.value;
}
});
ddl.appendTo('#stroke-width');
new ej.splitbuttons.SplitButton({iconCss: 'e-sign-icons e-save', items: items, select: onSelect, disabled: true }, '#save-option');
var strokeColor = new ej.inputs.ColorPicker({
presetColors: {
'custom': ['#000000', '#e91e63', '#9c27b0', '#673ab7', '#2196f3', '#03a9f4', '#00bcd4',
'#009688', '#8bc34a', '#cddc39', '#ffeb3b', '#ffc107']
},
modeSwitcher: false,
columns: 4,
beforeTileRender: function(args) {
args.element.classList.add('e-circle-palette');
args.element.appendChild(ej.base.createElement('span', { className: 'e-circle-selection' }));
},
showButtons: false, mode: 'Palette', cssClass: 'e-stroke-color', change: strokeColorChanged});
strokeColor.appendTo('#stroke-color');
var bgColor = new ej.inputs.ColorPicker({
modeSwitcher: false,
columns: 4,
beforeTileRender: function(args) {
args.element.classList.add('e-circle-palette');
args.element.appendChild(ej.base.createElement('span', { className: 'e-circle-selection' }));
},
presetColors: {
'custom': ['#f44336', '#e91e63', '#9c27b0', '#673ab7', '#2196f3', '#03a9f4', '#00bcd4',
'#009688', '#8bc34a', '#cddc39', '#ffeb3b', '#ffffff']
},
showButtons: false, mode: 'Palette', cssClass: 'e-bg-color', change: bgColorChanged});
bgColor.appendTo('#bg-color');
ej.base.addClass([strokeColor.element.nextElementSibling.querySelector('.e-selected-color')], 'e-sign-icons');
ej.base.addClass([bgColor.element.nextElementSibling.querySelector('.e-selected-color')], 'e-sign-icons');
clearButton();
var toolbarlItems = document.querySelectorAll('.e-toolbar .e-toolbar-items .e-toolbar-item .e-tbar-btn.e-tbtn-txt');
for (var i = 0; i < toolbarlItems.length; i++) {
if (toolbarlItems[i].children[0].classList.contains('e-undo')) {
var undoButton = ej.base.getComponent(toolbarlItems[i] , 'btn');
undoButton.disabled = true;
}
if (toolbarlItems[i].children[0].classList.contains('e-redo')) {
var redoButton= ej.base.getComponent(toolbarlItems[i], 'btn');
redoButton.disabled = true;
}
}
},
clicked: function(args) {
var saveBtn = ej.base.getComponent(document.getElementById("save-option"), 'split-btn');
if (signature.disabled && args.item.tooltipText != 'Disabled') {
return;
}
switch (args.item.tooltipText) {
case 'Undo (Ctrl + Z)':
if (signature.canUndo()) {
signature.undo();
updateUndoRedo();
}
break;
case 'Redo (Ctrl + Y)':
if (signature.canRedo()) {
signature.redo();
updateUndoRedo();
}
break;
case 'Clear':
signature.clear();
if (signature.isEmpty()) {
clearButton();
saveBtn.disabled = true;
}
break;
}
}
});
toolbarObj.appendTo('#toolbar');
function onSelect(args) {
signature.save(args.item.text, 'Signature');
}
function strokeColorChanged(args) {
if (signature.disabled) {
return;
}
var selElem = this.element.nextElementSibling.querySelector('.e-selected-color');
selElem.style.borderBottomColor = args.currentValue.rgba;
signature.strokeColor = args.currentValue.rgba;
}
function bgColorChanged(args) {
if (signature.disabled) {
return;
}
var selElem = this.element.nextElementSibling.querySelector('.e-selected-color');
signature.backgroundColor = args.currentValue.rgba;
selElem.style.borderBottomColor = args.currentValue.rgba;
}
function clearButton() {
var tlItems = document.querySelectorAll('.e-toolbar .e-toolbar-items .e-toolbar-item .e-tbar-btn.e-tbtn-txt');
for (var i = 0; i < tlItems.length; i++) {
if (tlItems[i].children[0].classList.contains('e-clear')) {
var clrBtn = ej.base.getComponent(tlItems[i], 'btn');
if (signature.isEmpty()) {
clrBtn.disabled = true;
} else {
clrBtn.disabled = false;
}
}
}
}
function disabledChange(args) {
signature.disabled = args.checked;
}
document.getElementById('save-option').onclick = function (e) {
signature.save();
};
function updateUndoRedo() {
var undoButton; var redoButton;
var tlItems = document.querySelectorAll('.e-toolbar .e-toolbar-items .e-toolbar-item .e-tbar-btn.e-tbtn-txt');
for (var i = 0; i < tlItems.length; i++) {
if (tlItems[i].children[0].classList.contains('e-undo')) {
undoButton = ej.base.getComponent(tlItems[i], 'btn');
}
if (tlItems[i].children[0].classList.contains('e-redo')) {
redoButton = ej.base.getComponent(tlItems[i], 'btn');
}
}
if (signature.canUndo()) {
undoButton.disabled = false;
} else {
undoButton.disabled = true;
}
if (signature.canRedo()) {
redoButton.disabled = false;
} else {
redoButton.disabled = true;
}
}<!DOCTYPE html><html lang="en"><head>
<title>EJ2 Signature</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="TypeScript Signature Component">
<meta name="author" content="Syncfusion">
<link href="styles.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-base/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-buttons/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-splitbuttons/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-navigations/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-dropdowns/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-inputs/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-popups/styles/material.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/21.2.3/dist/ej2.min.js" type="text/javascript"></script>
</head>
<body>
<div id="container">
<div id="signature-toolbar-control">
<div id="toolbar" style="width: 100%;"></div>
<div id="signature-control">
<canvas id="signature" style="height: 100%; width: 100%;"></canvas>
</div>
</div>
</div>
<script>
var ele = document.getElementById('container');
if(ele) {
ele.style.visibility = "visible";
}
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>#container {
visibility: hidden;
}
#loader {
color: #008cff;
font-family: 'Helvetica Neue','calibiri';
font-size: 14px;
height: 40px;
left: 45%;
position: absolute;
top: 45%;
width: 30%;
}
@font-face {
font-family: 'font-icons';
src:
url(data:application/x-font-ttf;charset=utf-8;base64,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) format('truetype');
font-weight: normal;
font-style: normal;
}
.e-sign-icons {
font-family: 'font-icons' !important;
font-size: 55px;
font-style: normal;
font-weight: normal;
font-variant: normal;
text-transform: none;
line-height: 1;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
#toolbar-control {
border: 1px solid lightgray;
}
#toolbar {
border: none;
border-bottom: 1px solid lightgray;
box-sizing: border-box;
}
#toolbar-control .e-btn:disabled {
opacity: 0.5 !important;
pointer-events: none;
}
#signature-control {
height: 300px;
width: 100%;
margin: 0;
}
#signature {
border: 1px solid lightgray;
}
.e-colorpicker-wrapper.e-bg-color #bg-color+.e-split-btn-wrapper .e-split-btn .e-selected-color {
background: none;
border-bottom-style: solid;
border-bottom-width: 3px;
width: 14px;
margin: 0px 2px;
border-bottom-color: #ffffff;
}
.e-colorpicker-wrapper.e-stroke-color #stroke-color+.e-split-btn-wrapper .e-split-btn .e-selected-color {
background: none;
border-bottom-style: solid;
border-bottom-width: 3px;
width: 14px;
margin: 0px 2px;
border-bottom-color: #000000;
}
.e-colorpicker-wrapper.e-bg-color #bg-color+.e-split-btn-wrapper .e-split-btn .e-selected-color .e-split-preview,
.e-colorpicker-wrapper.e-stroke-color #stroke-color+.e-split-btn-wrapper .e-split-btn .e-selected-color .e-split-preview {
display: none;
}
.e-colorpicker-wrapper.e-bg-color #bg-color+.e-split-btn-wrapper .e-split-btn .e-selected-color::before {
content: '\e707';
}
.e-colorpicker-wrapper.e-stroke-color #stroke-color+.e-split-btn-wrapper .e-split-btn .e-selected-color::before {
content: '\e704';
}
.e-clear::before {
content: '\e706';
}
.e-save::before {
content: '\e701';
}
.e-container .e-palette .e-circle-palette {
border: 0;
height: 32px;
width: 32px;
border-radius: 20px;
margin: 4px;
}
.e-container .e-palette .e-circle-palette:hover {
box-shadow: none;
transform: scale(1.2);
transition: transform .2s ease-out;
}
.e-circle-palette .e-circle-selection {
height: 32px;
width: 32px;
border-radius: 20px;
display: inline-block;
transform: scale(0);
transition: transform 1.2s ease-in;
}
.e-circle-palette.e-selected .e-circle-selection {
transform: scale(0.8);
background-color: #fff;
transition: transform .2s ease-out;
}
#circle-palette+.e-container,
#scroll-palette+.e-container {
background-color: transparent;
border-color: transparent;
box-shadow: none;
}