本文整理匯總了TypeScript中rx-lite.Observable.fromEvent方法的典型用法代碼示例。如果您正苦於以下問題：TypeScript Observable.fromEvent方法的具體用法？TypeScript Observable.fromEvent怎麽用？TypeScript Observable.fromEvent使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類rx-lite.Observable的用法示例。
在下文中一共展示了Observable.fromEvent方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: getDataObservable
private getDataObservable() {
let click = Rx.Observable.fromEvent($("#openFile"), "click");
// fromCallback() converts a function that takes a callback into a new
// function that takes all of the original function's arguments except the
// callback and returns an Observable of the callback's return value.
let opener = Rx.Observable.fromCallback(dialog.showOpenDialog);
let reader = Rx.Observable.fromCallback(fs.readFile);
let isValid: boolean;
// Pipeline of observables to convert a stream of clicks into a stream of
// validated file data
return click
.flatMap(() => opener({ properties: ["openFile"] }) // returns the selected filename (as one-item array)
.filter(f => f) // Don't emit event if user didn't select a file
.flatMap(f => reader(f[0], "utf-8")) // map file name stream to file data stream
.map(d => d[1]) // Hack: Observable-wrapped readFile returns [null, fileData] (?)
.do(d => {
isValid = Parser.validateData(d); // put validity info in outer scope...
if (!isValid) alert("Invalid data");
})
.filter(() => isValid)); // ...so .filter() doesn't have to call validateData() again
}