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Input focus not working in electron properly

So far I build a simple Electron application. My problem is the input.focus() is not working on displaying an alert box. I tried to solve the problem, and I came up with a solution: when I minimize and maximize the window, the input.focus() is working well. So when I try to show an alert box, the input.focus() isn't working, except minimize and maximizing. I try to open the code in Chrome, and all functionalities are working very well, so the problem is in the Electron renderer.
Before minimizing and maximizing the window
After minimizing and maximizing the window
My Electron renderer
const path = require("path");
const { app, BrowserWindow } = require("electron");
const createWindow = () => {
const win = new BrowserWindow({
width: 780,
height: 600,
minWidth: 780,
minHeight: 600,
icon: path.join(__dirname, "assets/favicon.ico"),
webPreferences: {},
});
win.maximize();
// win.removeMenu();
win.loadFile("index.html");
};
app.whenReady().then(() => {
createWindow();
app.on("activate", () => {
if (BrowserWindow.getAllWindows().length === 0)
createWindow();
});
});
app.on("window-all-closed", () => {
if (process.platform !== "darwin")
app.quit();
});

The Input focus will lose if the app window not focused.
When you minimize and maximize the app window the input focus come back.
And When you send alert box the alert open in another window so the main app window blur and its input focus blur.

Opening a file and clicking to a button from Touch Bar in electron.js

I implemented a touch bar button to my program which loads a file. My question is: How can I click to a specific button on the website after that page has loaded when I press the touch bar button? Here is my main.js file:
const { app, BrowserWindow, TouchBar } = require('electron')
const { TouchBarButton } = TouchBar
const path = require('path')
let window
function createWindow() {
const win = new BrowserWindow({
width: 1366,
height: 758,
minWidth: 1300,
minHeight: 700,
icon: __dirname + 'logoSquare.icns',
webPreferences: {
//preload: path.join(__dirname, 'preload.js')
}
})
win.loadFile('login.html')
win.maximize()
return win
}
app.whenReady().then(() => {
window = createWindow()
const button = new TouchBarButton({
label: `🛫 Add Flight`,
accessibilityLabel: 'Add Flight',
backgroundColor: '#a20021',
click: () => {
window.loadFile('./flights.html')
},
});
const touchBar = new TouchBar({
items: [
button,
],
})
window.setTouchBar(touchBar);
app.on('activate', () => {
if (BrowserWindow.getAllWindows().length === 0) {
createWindow()
}
})
})
app.on('window-all-closed', () => {
if (process.platform !== 'darwin') {
app.quit()
}
})
I have just started learning electron.js and couldn't find a solution yet.

I found an alternate way to solve this issue. I sent a query and got that information with JavaScript. This is the main.js file that is responsible for sending the query:
const button = new TouchBarButton({
label: `🛫 Add Flight`,
accessibilityLabel: 'Add Flight',
backgroundColor: '#3a2e39',
click: () => {
//window.loadFile('./flights.html?addflight=1')
window.loadURL('file://'+__dirname+'/flights.html?addflight=1')
},
})
And this is the code that is responsible for receiving data in the flights.html file with JavaScript:
function addFlightRedir() {
if (location.search == '?addflight=1') {
addNewFlight(); // This is the code that I wanted to execute
}
}
addFlightRedir();
And since it is reusable with standard JS, now I can implement it to the other areas of my program as well (independent from the Touch Bar buttons).

how to set windows thumbnail toolbar in electron application

I am trying to add thumbnail toolbar with specified buttons in a taskbar layout of an application from it's doc. But it's showing some problem.
The main.js:
// Modules to control application life and create native browser window
const {app, BrowserWindow, ipcMain, dialog} = require('electron')
const path = require('path')
// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow;
const isSecondInstance = app.makeSingleInstance((commandLine, workingDirectory) => {
if (mainWindow) {
if (mainWindow.isMinimized()) mainWindow.restore()
mainWindow.focus()
}
})
if (isSecondInstance) {
app.quit();
}
function createWindow () {
// Create the browser window.
mainWindow = new BrowserWindow({
show: false,
width: 500,
height: 200,
minWidth: 500,
minHeight: 200,
transparent: true,
frame: false,
})
mainWindow.setResizable(false)
// and load the index.html of the app.
mainWindow.loadFile('index.html')
// Open the DevTools.
// mainWindow.webContents.openDevTools()
mainWindow.once('ready-to-show', () => {
mainWindow.show()
mainWindow.focus()
})
// Emitted when the window is closed.
mainWindow.on('closed', function () {
// Dereference the window object, usually you would store windows
// in an array if your app supports multi windows, this is the time
// when you should delete the corresponding element.
mainWindow = null
})
}
// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', createWindow)
// Quit when all windows are closed.
app.on('window-all-closed', function () {
// On OS X it is common for applications and their menu bar
// to stay active until the user quits explicitly with Cmd + Q
if (process.platform !== 'darwin') {
app.quit()
}
})
app.on('activate', function () {
// On OS X it's common to re-create a window in the app when the
// dock icon is clicked and there are no other windows open.
if (mainWindow === null) {
createWindow()
}
})
// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.
ipcMain.on('open-information-dialog', (event) => {
if (mainWindow) {
const options = {
type: 'info',
title: 'I am abled',
buttons: ['Ok'],
message: 'This is the way.'
}
dialog.showMessageBox(mainWindow, options, function () {})
}
})
ipcMain.on('close', (event) => {
app.quit()
})
ipcMain.on('minimize', (event) => {
mainWindow.minimize()
})
ipcMain.on('progress', (event, per) => {
mainWindow.setProgressBar(per)
})
mainWindow.setThumbarButtons([
{
tooltip: 'button1',
icon: path.join(__dirname, 'button1.png'),
click () { console.log('button1 clicked') }
}, {
tooltip: 'button2',
icon: path.join(__dirname, 'button2.png'),
flags: ['enabled', 'dismissonclick'],
click () { console.log('button2 clicked.') }
}
])
The error:
All of my mainWindow reference working fine but when I am trying to set thumbar buttons with setThumbarButtons() it's getting the problem. I just try this one and I don't get any error but it's not showing any buttons on taskber window,
The Code:
app.on('ready', function(){
console.log(mainWindow)
mainWindow.setThumbarButtons([
{
tooltip: 'button1',
icon: path.join(__dirname, 'start.png'),
click () { console.log('button1 clicked') }
}
])
})
I can't make any sense with this problem.

The problem is that when you run mainWindow.setThumbarButtons your window hasn't been created. Therefor mainWindow is undefined. Which is the error you are running into, and what it says in the error screenshot you posted.
Currently you are creating and setting your window in the createWindow function.
If you move your setThumbarButtons code into the createWindow function it should work.
Something like the following:
function createWindow () {
// Create the browser window.
mainWindow = new BrowserWindow({
show: false,
width: 500,
height: 200,
minWidth: 500,
minHeight: 200,
transparent: true,
frame: false,
})
mainWindow.setResizable(false)
// and load the index.html of the app.
mainWindow.loadFile('index.html')
mainWindow.setThumbarButtons([
{
tooltip: 'button1',
icon: path.join(__dirname, 'start.png'),
click () { console.log('button1 clicked') }
}
])
// Open the DevTools.
// mainWindow.webContents.openDevTools()
mainWindow.once('ready-to-show', () => {
mainWindow.show()
mainWindow.focus()
})
// Emitted when the window is closed.
mainWindow.on('closed', function () {
// Dereference the window object, usually you would store windows
// in an array if your app supports multi windows, this is the time
// when you should delete the corresponding element.
mainWindow = null
})
}
That way you are creating the mainWindow first and defining it before calling that function. Otherwise mainWindow will be undefined which is what you were experiencing.

Error on React-Native Android hardaware BackButton click "Undefined is not a function(evaluating '_this2.close()') "

I have installed the react-native-orientation-loading-overlay package for applying the loader on the screen.
When user clicks on the hardware back button, the backAndroid's addEventListener is called. Depending on the condition, loader's animating property is set to true and the orientation loader starts loading.
While loading, the another function this.fetchData() is started running which fetches data by running the webservice and display in listview of same page i.e mainPage.
And while loading, if the user has again pressed the back button the red screen with the error "Undefined is not a function(evaluating _this2.close()) in onRequestClose method of react-native-orienation-loading-overlay\src\index.js file" displays .I have tried to BackAndroid.removeEventListener('hardwareBackPress', () => {}); after the loader's animating property is set to true but its not
working.
Please give me any solution.
import OrientationLoadingOverlay from 'react-native-orientation-loading-overlay';
<OrientationLoadingOverlay
visible={this.state.animating}
color="#6495ed"
indicatorSize="large"
messageFontSize={16}
message="Loading..."
/>
My hardware backbutton click event listener code is as follows:
BackAndroid.addEventListener('hardwareBackPress', () => {
if(this.state.drawerState===true) {
this.refs['draw'].closeDrawer();
} else {
if(this.props.navigator.getCurrentRoutes().length===1&&
this.state.tagPressed===false){
if (stack.length===0){
Alert.alert(
'Exit',
'Are you sure?',
[
{text: 'Cancel', onPress: () => {return true;}},
{text: 'Yes', onPress: () => BackAndroid.exitApp()},
],
)
} else {
this.backButtonEvent();
}
} else {
if(this.props.navigator.getCurrentRoutes().length===1&&
this.state.tagPressed===true) {
this.setState({ animating: true });
this.setState({ tagPressed: false });
this.setState({ title: 'Repository' });
this.fetchData();
} else {
this.props.navigator.pop();
}
}
}
return true;
});
Here the stack.length is the length of array of navigated routes. And my backButtonEvent() function is as follows:
backButtonEvent() {
if(stack.length===0) {
this.refs['draw'].openDrawer();
} else{
this.setState({animating:true});
dirPath = stack.pop();
title = this.titleStack.pop();
if(stack.length===0) {
this.setState({srcUrl:require('../image/drawer1.png')});
this.setState({drawerLock:'unlocked'});
}
this.fetchData();
}
}
<ListView
dataSource={this.state.dataSource}
renderRow={(this.renderItem.bind(this))}
enableEmptySections = {true}
/>
fetchData(data){
this.setState({
dataSource: this.state.dataSource.cloneWithRows(data)
});
}

Refer to the line 82 of source code of the react-native-orientation-loading-overlay, it uses the function this.close() to close the Modal but when refer to the RN 0.41 Documentation, this.close() is not pre-defined function for Modal, therefore it triggered the mentioned error when typeof this.props.children === 'undefined'. It is a bug for the package. It might have new state to control the on/off of the Modal, and allow this.close() function to change the state to off the Modal.

Electron - Open file from menu

I have a button in my electron app that says 'open file', and when you click on it the open file dialog box comes up and I am able to select a file.
Although, how am I able to open the 'open file dialog' box when I click a menu item from the apps toolbar?
This is my label in a submenu for the toolbar menu:
label: 'Open',
accelerator: 'CmdOrCtrl+O'
I want to do something like:
label: 'Open',
accelerator: 'CmdOrCtrl+O',
role: 'open'
But there is no such role as 'open'.
How can I implement an on click event that opens the open file dialog box?
Main.js open file section:
const ipc = require('electron').ipcMain
const dialog = require('electron').dialog
ipc.on('open-file-dialog', function (event) {
dialog.showOpenDialog({
properties: ['openFile', 'openDirectory']
}, function (files) {
if (files) event.sender.send('selected-file', files)
})
})
index.js:
const ipc = require('electron').ipcRenderer
const selectDirBtn = document.getElementById('open')
selectDirBtn.addEventListener('click', function (event) {
ipc.send('open-file-dialog')
})
ipc.on('selected-file', function (event, path) {
document.getElementById('selected-file').innerHTML = `► ${path}`
document.getElementById('selected-file2').innerHTML = `${path}`
})

Prime: Use IPC to communicate between the main and render process
Here is an example:
// main.js
const { app, BrowserWindow, Menu, dialog, ipcMain } = require('electron')
// wait until the app is ready before you can do anything
app.whenReady().then(function() {
// setting up the main window object
const mainWindow = new BrowserWindow({
backgroundColor: '#FFF',
webPreferences: {
// devTools: true,
nodeIntegration: true
},
show: false,
})
// setting up the menu with just two items
const menu = Menu.buildFromTemplate([
{
label: 'Menu',
submenu: [
{
label:'Open File',
accelerator: 'CmdOrCtrl+O',
// this is the main bit hijack the click event
click() {
// construct the select file dialog
dialog.showOpenDialog({
properties: ['openFile']
})
.then(function(fileObj) {
// the fileObj has two props
if (!fileObj.canceled) {
mainWindow.webContents.send('FILE_OPEN', fileObj.filePaths)
}
})
// should always handle the error yourself, later Electron release might crash if you don't
.catch(function(err) {
console.error(err)
})
}
},
{
label:'Exit',
click() {
app.quit()
}
}
]
}
])
Menu.setApplicationMenu(menu)
// now run it
mainWindow.loadURL(`file://${__dirname}/index.html`)
mainWindow.show()
})
Not going to show the index.html you should know what to do, just include the render.js into the HTML document.
Now the render.js
// render.js
const { ipcRenderer } = window.require('electron')
ipcRenderer.on('FILE_OPEN', (event, args) => {
// here the args will be the fileObj.filePaths array
// do whatever you need to do with it
console.log('got FILE_OPEN', event, args)
})
This was tested run on Electron 9.X

I had two buttons, a non-visible input file and visible styled button.
<input type="file" id="fileId" style="display:none;" />
<button class="btn-lg btn-primary center-block" type="button"
id="btnLoadFile">Load File</button>
In the js, I set the styled button click event to trigger the input file click event.
document.getElementById('btnLoadFile').addEventListener("click", function(){
document.getElementById('fileId').click();
});
Then I have an on change event listener for the input file element, that does some operation with the file.
document.getElementById('fileId').addEventListener('change', function(e){
//use the file here
var files = e.target.files;
var f = files[0]; {
var reader = new FileReader();
var name = f.name;
reader.onload = function (e) {
console.log(e.target.result);
};
reader.readAsBinaryString(f);
}
});
Hope this helps.