The Signature component 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.
<template>
<div>
<div class="col-lg-12 control-section">
<div id="signature-toolbar-control">
<ejs-toolbar id="toolbar" :created="onCreate" :clicked="clicked">
<e-items>
<e-item text='Undo' prefixIcon='e-icons e-undo' tooltipText='Undo (Ctrl + Z)'></e-item>
<e-item text='Redo' prefixIcon='e-icons e-redo' tooltipText='Redo (Ctrl + Y)' ></e-item>
<e-item type='Separator'></e-item>
<e-item tooltipText= 'Save (Ctrl + S)' :template= 'SaveTemplate'></e-item>
<e-item type='Separator'></e-item>
<e-item tooltipText= 'Stroke Color' :template= 'StrokeColorTemplate'></e-item>
<e-item type='Separator'></e-item>
<e-item tooltipText= 'Background Color' :template= 'BgColorTemplate'></e-item>
<e-item type='Separator'></e-item>
<e-item tooltipText= 'Stroke Width' :template= 'StrokeWidthTemplate'></e-item>
<e-item type='Separator'></e-item>
<e-item text= 'Clear' prefixIcon= 'e-sign-icons e-clear' tooltipText= 'Clear'></e-item>
<e-item tooltipText= 'Disabled' :template='DisableTemplate' align='Right'></e-item>
</e-items>
</ejs-toolbar>
<div id="signature-control">
<ejs-signature #signature id="signature" :maxStrokeWidth="maxStrokeWidth" style="height: 90%; width:100%;" :change="signChange"></ejs-signature>
</div>
</div>
</div>
</div>
</template>
<script>
import Vue from 'vue';
import { SignaturePlugin, ColorPickerPlugin } from "@syncfusion/ej2-vue-inputs";
import { ToolbarPlugin } from "@syncfusion/ej2-vue-navigations";
import { SplitButtonPlugin } from "@syncfusion/ej2-vue-splitbuttons";
import { CheckBoxPlugin, ButtonPlugin } from "@syncfusion/ej2-vue-buttons";
import { getComponent, addClass, createElement } from '@syncfusion/ej2-base';
import { DropDownListPlugin } from "@syncfusion/ej2-vue-dropdowns";
import { enableRipple } from '@syncfusion/ej2-base';
enableRipple(true);
Vue.use(SignaturePlugin);
Vue.use(ColorPickerPlugin);
Vue.use(ToolbarPlugin);
Vue.use(SplitButtonPlugin);
Vue.use(CheckBoxPlugin);
Vue.use(ButtonPlugin);
Vue.use(DropDownListPlugin);
export default {
data: function() {
return {
maxStrokeWidth: 2,
SaveTemplate: function () {
return {
template: Vue.component('SplitButtonComponent', {
template: '<ejs-splitbutton content="Save" id="save-option" :items="items" iconCss= "e-sign-icons e-save" :select="onSelect" disabled="true"></ejs-splitbutton>',
data() { return {
items: [
{
text: 'Png'
},
{
text: 'Jpeg'
},
{
text: 'Svg'
}
]};
},
methods: {
onSelect: function(args) {
var signature = getComponent(document.getElementById('signature'), 'signature');
signature.save(args.item.text, 'Signature');
}
}
})
}
},
StrokeColorTemplate: function () {
return {
template: Vue.component('ColorPickerComponent', {
template: '<ejs-colorpicker id="stroke-color" mode="Palette" cssClass="e-stroke-color" :change="strokeColorChanged" :modeSwitcher= "false" :columns="4" :presetColors="customColors" :beforeTileRender="beforeTileRender" :showButtons= "false"></ejs-colorpicker>',
data() { return {
customColors:{
'custom': ['#000000', '#e91e63', '#9c27b0', '#673ab7', '#2196f3', '#03a9f4', '#00bcd4',
'#009688', '#8bc34a', '#cddc39', '#ffeb3b', '#ffc107']
}
};},
methods: {
beforeTileRender: function(args) {
args.element.classList.add('e-circle-palette');
args.element.appendChild(createElement('span', { className: 'e-circle-selection' }));
},
strokeColorChanged: function(args) {
var signature = getComponent(document.getElementById('signature'), 'signature');
var strokecolor = getComponent(document.getElementById('stroke-color'), 'colorpicker');
if (signature.disabled) {
return;
}
var selElem= strokecolor.element.nextElementSibling.querySelector('.e-selected-color');
selElem.style.borderBottomColor = args.currentValue.rgba;
signature.strokeColor = args.currentValue.rgba;
}
}
})
}
},
BgColorTemplate: function () {
return {
template: Vue.component('ColorPickerComponent', {
template: '<ejs-colorpicker id="bg-color" noColor="true" mode="Palette" cssClass="e-bg-color" :change="bgColorChanged" :modeSwitcher= "false" :columns="4" :presetColors="customColors" :beforeTileRender="beforeTileRender1" :showButtons= "false"></ejs-colorpicker>',
data() { return {
customColors:{
'custom': ['#ffffff', '#f44336', '#e91e63', '#9c27b0', '#673ab7', '#2196f3', '#03a9f4', '#00bcd4',
'#009688', '#8bc34a', '#cddc39', '#ffeb3b']
}
};},
methods: {
beforeTileRender1: function(args) {
args.element.classList.add('e-circle-palette');
args.element.appendChild(createElement('span', { className: 'e-circle-selection' }));
},
bgColorChanged: function(args) {
var signature = getComponent(document.getElementById('signature'), 'signature');
var bgcolor = getComponent(document.getElementById('bg-color'), 'colorpicker');
if (signature.disabled) {
return;
}
var selElem= bgcolor.element.nextElementSibling.querySelector('.e-selected-color');
signature.backgroundColor = args.currentValue.rgba;
selElem.style.borderBottomColor = args.currentValue.rgba;
}
}
})
}
},
DisableTemplate: function () {
return {
template: Vue.component('CheckBoxComponent', {
template: '<ejs-checkbox label="Disabled" :change="change1"></ejs-checkbox>',
data() { return {
};},
methods: {
change1: function(args) {
var signature = getComponent(document.getElementById('signature'), 'signature');
signature.disabled = args.checked;
}
}
})
}
},
StrokeWidthTemplate: function () {
return {
template: Vue.component('DropDownListComponent', {
template: '<ejs-dropdownlist :value="value" width="60" :dataSource="items":change="numChange"></ejs-dropdownlist>',
data() { return {
value: 2,
items:[1, 2, 3, 4, 5]
};},
methods: {
numChange: function(args) {
var signature = getComponent(document.getElementById('signature'), 'signature');
signature.maxStrokeWidth = args.value;
}
}
})
}
}
};
},
methods: {
onCreate: function() {
var strokeColor = getComponent(document.getElementById('stroke-color'), 'colorpicker');
var bgColor = getComponent(document.getElementById('bg-color'), 'colorpicker');
addClass([strokeColor.element.nextElementSibling.querySelector('.e-selected-color')], 'e-sign-icons');
addClass([bgColor.element.nextElementSibling.querySelector('.e-selected-color')], 'e-sign-icons');
document.getElementById('save-option').addEventListener('click', this.saveBtnClick);
var cBtn = this.clearButton();
cBtn.disabled = true;
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 = getComponent(toolbarlItems[i] , 'btn');
undoButton.disabled = true;
}
if (toolbarlItems[i].children[0].classList.contains('e-redo')) {
var redoButton= getComponent(toolbarlItems[i], 'btn');
redoButton.disabled = true;
}
}
},
clicked:function(args) {
var signature = getComponent(document.getElementById('signature'), 'signature');
var saveBtn = getComponent(document.getElementById("save-option"), 'split-btn');
if (signature.disabled) {
return;
}
switch (args.item.tooltipText) {
case 'Undo (Ctrl + Z)':
if (signature.canUndo()) {
signature.undo();
this.updateUndoRedo();
this.updateSaveBtn();
}
break;
case 'Redo (Ctrl + Y)':
if (signature.canRedo()) {
signature.redo();
this.updateUndoRedo();
this.updateSaveBtn();
}
break;
case 'Clear':
signature.clear();
if (signature.isEmpty()) {
var cBtn = this.clearButton();
cBtn.disabled = true;
saveBtn.disabled = true;
}
break;
case 'Disabled':
signature.disabled = !(args.item.template).checked;
}
},
signChange: function() {
var signature = getComponent(document.getElementById('signature'), 'signature');
var saveBtn = getComponent(document.getElementById("save-option"), 'split-btn');
if (!signature.isEmpty()) {
var cBtn = this.clearButton();
saveBtn.disabled = false;
cBtn.disabled = false;
}
this.updateUndoRedo();
},
saveBtnClick: function() {
var signature = getComponent(document.getElementById('signature'), 'signature');
signature.save();
},
clearButton: function() {
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 = getComponent(tlItems[i], 'btn');
}
}
return clrBtn;
},
updateSaveBtn: function() {
var signature = getComponent(document.getElementById('signature'), 'signature');
var saveBtn = getComponent(document.getElementById("save-option"), 'split-btn');
if (signature.isEmpty()) {
saveBtn.disabled = true;
}
},
updateUndoRedo: function() {
var signature = getComponent(document.getElementById('signature'), 'signature');
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 = getComponent(tlItems[i], 'btn');
}
if (tlItems[i].children[0].classList.contains('e-redo')) {
redoButton = getComponent(tlItems[i], 'btn');
}
}
if (signature.canUndo()) {
undoButton.disabled = false;
} else {
undoButton.disabled = true;
}
if (signature.canRedo()) {
redoButton.disabled = false;
} else {
redoButton.disabled = true;
}
}
}
}
</script>
<style>
@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-buttons/styles/material.css";
@import "../node_modules/@syncfusion/ej2-vue-inputs/styles/material.css";
@import "../node_modules/@syncfusion/ej2-vue-lists/styles/material.css";
@import '../node_modules/@syncfusion/ej2-popups/styles/material.css';
@import '../node_modules/@syncfusion/ej2-splitbuttons/styles/material.css';
@import "../node_modules/@syncfusion/ej2-navigations/styles/material.css";
@import "../node_modules/@syncfusion/ej2-vue-dropdowns/styles/material.css";
@font-face {
font-family: 'font-icons';
src:
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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;
}
#signature-toolbar-control {
border: 1px solid lightgray;
}
.highcontrast #signature-toolbar-control {
border: 1px solid white;
}
#signature-toolbar-control #toolbar {
border: none;
border-bottom: 1px solid lightgray;
box-sizing: border-box;
}
#signature-toolbar-control #toolbar {
height: 44px !important;
}
#signature-toolbar-control .e-btn:disabled {
opacity: 0.5 !important;
pointer-events: none;
}
#signature-toolbar-control #signature-control {
height: 300px;
width: 100%;
margin: 0;
}
#signature-toolbar-control #signature {
border: none !important;
}
.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';
}
#signature-toolbar-control .e-clear::before {
content: '\e706';
}
#signature-toolbar-control .e-save::before {
content: '\e701';
}
/* Circle palette customization */
.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;
}
.e-container .e-palette .e-circle-palette.e-selected {
outline: none;
}
.e-bg-color .e-circle-palette.e-nocolor-item.e-selected .e-circle-selection {
background: transparent;
}
.e-bg-color .e-circle-palette.e-nocolor-item.e-selected {
border: 3px solid lightgray;
}
</style>