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KeillionKeillion
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Shallow review
1 parent df628ab commit 3e43504

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‎1.hello-world/1.minimum-code.html‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -36,10 +36,10 @@ <h2>Minimum Code to Read Barcodes</h2>
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/** LICENSE ALERT - THE END */
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let scanner = null;
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let pScanner = null;
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document.getElementById('readBarcode').onclick = async function () {
4141
try {
42-
scanner = scanner || await Dynamsoft.DBR.BarcodeScanner.createInstance();
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let scanner = await (pScanner = pScanner || Dynamsoft.DBR.BarcodeScanner.createInstance());
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/*
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* onFrameRead is triggered once each frame is read.
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* There can be one or multiple barcodes on each frame.

‎1.hello-world/2.read-an-image.html‎

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Original file line numberDiff line numberDiff line change
@@ -48,10 +48,10 @@ <h2>Read An Existing Image</h2>
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/** LICENSE ALERT - THE END */
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// reader for decoding picture
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let reader = null;
51+
let pReader = null;
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// decode input picture
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window.onload = async function () {
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// Create a BarcodeReader instance on page load to speed things up.
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// Load the library on page load to speed things up.
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try {
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await Dynamsoft.DBR.BarcodeReader.loadWasm();
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} catch (ex) {
@@ -63,7 +63,7 @@ <h2>Read An Existing Image</h2>
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try {
6464
document.getElementById("imgToRead").hidden = true;
6565
document.getElementById('lib-load').hidden = false;
66-
reader = reader || await Dynamsoft.DBR.BarcodeReader.createInstance();
66+
let reader = await (pReader = pReader || Dynamsoft.DBR.BarcodeReader.createInstance());
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document.getElementById('lib-load').hidden = true;
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document.getElementById('reading').hidden = false;
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for (let i = 0; i < this.files.length; ++i) {

‎1.hello-world/3.read-video-angular/src/app/barcode-scanner/barcode-scanner.component.html‎

Lines changed: 101 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -1,10 +1,103 @@
11
<div v-once class="component-barcode-scanner">
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<svg class="dbrScanner-bg-loading" viewBox="0 0 1792 1792"><path d="M1760 896q0 176-68.5 336t-184 275.5-275.5 184-336 68.5-336-68.5-275.5-184-184-275.5-68.5-336q0-213 97-398.5t265-305.5 374-151v228q-221 45-366.5 221t-145.5 406q0 130 51 248.5t136.5 204 204 136.5 248.5 51 248.5-51 204-136.5 136.5-204 51-248.5q0-230-145.5-406t-366.5-221v-228q206 31 374 151t265 305.5 97 398.5z"/></svg>
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<svg class="dbrScanner-bg-camera" style="display:none;" viewBox="0 0 2048 1792"><path d="M1024 672q119 0 203.5 84.5t84.5 203.5-84.5 203.5-203.5 84.5-203.5-84.5-84.5-203.5 84.5-203.5 203.5-84.5zm704-416q106 0 181 75t75 181v896q0 106-75 181t-181 75h-1408q-106 0-181-75t-75-181v-896q0-106 75-181t181-75h224l51-136q19-49 69.5-84.5t103.5-35.5h512q53 0 103.5 35.5t69.5 84.5l51 136h224zm-704 1152q185 0 316.5-131.5t131.5-316.5-131.5-316.5-316.5-131.5-316.5 131.5-131.5 316.5 131.5 316.5 316.5 131.5z"/></svg>
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<video class="dbrScanner-video" playsinline="true"></video>
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<canvas class="dbrScanner-cvs-drawarea"></canvas>
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<div class="dbrScanner-cvs-scanarea">
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<div class="dbrScanner-scanlight" style="display:none;"></div>
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</div>
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<div style="position:absolute;left:50%;bottom:3%;padding:0 5px;margin: 0;font-family:Helvetica Neue,Helvetica,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans CJK SC,WenQuanYi Micro Hei,Arial,sans-serif;line-height:18px;font-size:12px;color:white;background-color: rgba(0,0,0,.3);border-radius:8px;transform:translateX(-50%);">Powered by Dynamsoft</div>
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<svg class="dbrScanner-bg-loading"
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style="display:none;animation:1s linear infinite dbrScanner-rotate;width:40%;height:40%;position:absolute;margin:auto;left:0;top:0;right:0;bottom:0;fill:#aaa;"
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viewBox="0 0 1792 1792">
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<path d="M1760 896q0 176-68.5 336t-184 275.5-275.5 184-336 68.5-336-68.5-275.5-184-184-275.5-68.5-336q0-213 97-398.5t265-305.5 374-151v228q-221 45-366.5 221t-145.5 406q0 130 51 248.5t136.5 204 204 136.5 248.5 51 248.5-51 204-136.5 136.5-204 51-248.5q0-230-145.5-406t-366.5-221v-228q206 31 374 151t265 305.5 97 398.5z" />
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</svg>
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<svg class="dbrScanner-bg-camera"
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style="display:none;width:40%;height:40%;position:absolute;margin:auto;left:0;top:0;right:0;bottom:0;fill:#aaa;"
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viewBox="0 0 2048 1792">
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<path d="M1024 672q119 0 203.5 84.5t84.5 203.5-84.5 203.5-203.5 84.5-203.5-84.5-84.5-203.5 84.5-203.5 203.5-84.5zm704-416q106 0 181 75t75 181v896q0 106-75 181t-181 75h-1408q-106 0-181-75t-75-181v-896q0-106 75-181t181-75h224l51-136q19-49 69.5-84.5t103.5-35.5h512q53 0 103.5 35.5t69.5 84.5l51 136h224zm-704 1152q185 0 316.5-131.5t131.5-316.5-131.5-316.5-316.5-131.5-316.5 131.5-131.5 316.5 131.5 316.5 316.5 131.5z" />
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</svg>
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<video class="dbrScanner-video" playsinline="true"
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style="width:100%;height:100%;position:absolute;left:0;top:0;"></video>
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<canvas class="dbrScanner-cvs-drawarea" style="width:100%;height:100%;position:absolute;left:0;top:0;"></canvas>
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<div class="dbrScanner-cvs-scanarea" style="width:100%;height:100%;position:absolute;left:0;top:0;">
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<div class="dbrScanner-scanlight" style="display:none;width:100%;height:3%;position:absolute;animation:3s infinite dbrScanner-scanlight;border-radius:50%;box-shadow:0px 0px 2vw 1px #00e5ff;background:#fff;user-select:none;"></div>
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</div>
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<select class="dbrScanner-sel-camera" style="margin:0 auto;position:absolute;left:0;top:0;"></select>
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<select class="dbrScanner-sel-resolution" style="position:absolute;left:0;top:20px;"></select>
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<button class="dbrScanner-btn-close" style="position:absolute;right:0;top:0;">
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<svg width="16" height="16" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
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<path d="M1490 1322q0 40-28 68l-136 136q-28 28-68 28t-68-28l-294-294-294 294q-28 28-68 28t-68-28l-136-136q-28-28-28-68t28-68l294-294-294-294q-28-28-28-68t28-68l136-136q28-28 68-28t68 28l294 294 294-294q28-28 68-28t68 28l136 136q28 28 28 68t-28 68l-294 294 294 294q28 28 28 68z" />
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</svg>
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</button>
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<!-- The "Powered by Dynamsoft" logo can be easily removed by eliminating the following line. -->
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<div class="dbrScanner-msg-poweredby" style="position:absolute;left:50%;bottom:10%;transform:translateX(-50%);">
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<svg viewBox="0 0 94 17" style="height:max(3vmin,17px);fill:#FFFFFF;">
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<g>
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‎1.hello-world/3.read-video-angular/src/app/barcode-scanner/barcode-scanner.component.ts‎

Lines changed: 9 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -7,20 +7,20 @@ import DBR from 'dynamsoft-javascript-barcode'
77
})
88
export class BarcodeScannerComponent implements OnInit {
99
bDestroyed = false;
10-
scanner = null;
10+
pScanner = null;
1111
@Output() appendMessage = new EventEmitter();
1212
constructor(private elementRef: ElementRef) { }
1313

1414
async ngOnInit(): Promise<void> {
1515
try {
16-
this.scanner = this.scanner || await DBR.BarcodeScanner.createInstance();
16+
let scanner = await (this.pScanner = this.pScanner || DBR.BarcodeScanner.createInstance());
1717

1818
if (this.bDestroyed) {
19-
this.scanner.destroy();
19+
scanner.destroy();
2020
return;
2121
}
22-
this.scanner.setUIElement(this.elementRef.nativeElement);
23-
this.scanner.onFrameRead = results => {
22+
scanner.setUIElement(this.elementRef.nativeElement);
23+
scanner.onFrameRead = results => {
2424
for (let result of results) {
2525
this.appendMessage.emit({ format: result.barcodeFormatString, text: result.barcodeText, type: "result" });
2626

@@ -29,16 +29,16 @@ export class BarcodeScannerComponent implements OnInit {
2929
}
3030
}
3131
};
32-
await this.scanner.open();
32+
await scanner.open();
3333
} catch (ex) {
3434
this.appendMessage.emit({ msg: ex.message, type: "error" });
3535
console.error(ex);
3636
}
3737
}
38-
ngOnDestroy() {
38+
async ngOnDestroy() {
3939
this.bDestroyed = true;
40-
if (this.scanner) {
41-
this.scanner.destroy();
40+
if (this.pScanner) {
41+
(await this.pScanner).destroy();
4242
}
4343
}
4444
}

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