Electron app across 2 displays? - electron

Can an electron app run one window across 2 monitors? I'm not able to drag the edge across to the other monitor. is this possible?
I know I can do this to access the second screen.
const electron = require('electron')
const {app, BrowserWindow} = require('electron')
let win
app.on('ready', () => {
let displays = electron.screen.getAllDisplays()
let externalDisplay = displays.find((display) => {
return display.bounds.x !== 0 || display.bounds.y !== 0
})
if (externalDisplay) {
win = new BrowserWindow({
x: externalDisplay.bounds.x + 50,
y: externalDisplay.bounds.y + 50
})
win.loadURL('https://github.com')
}
})
however, I dont want 2 windows just one across 2 displays.

You can drag the electron window like any other window.
If you want to set the window size, you either do it when a BrowserWindow is created or via BrowserWindow.setSize() to modify the size see BrowserWindow docs

That was real problem, that it was impossible to set via BrowserWindow.setSize() values gather than height and width of first screen, to open window stretched on few screens
But finally I have found, the solution is
BrowserWindow.setMinimumSize(W, H);
that allows to set width, like 10`000px, for few monitors, and it will be applied unlike setSize

Related

How to hide Electron.js frame?

I also looked for solutions to other problems, but they did not turn out as I wanted. How can I delete the top bar of the window, as I marked in the photo?
[photo]
native APIs directly supports frameless windows. You need to pass the frame option false while creating new window. Here is the example.
const { BrowserWindow } = require('electron')
const win = new BrowserWindow({ width: 800, height: 600, frame: false })
win.show()
You can read more at official docs

How to set the devTools window position in electron

I got this from the docs
app.on('ready', function(){
devtools = new BrowserWindow()
window = new BrowserWindow({width:800, height:600})
window.loadURL(path.join('file://', __dirname, 'static/index.html'))
window.webContents.setDevToolsWebContents(devtools.webContents)
window.webContents.openDevTools({mode: 'detach'})
})
It opens two windows, on is the dev tools. But it's exactly underneath the main window.
Is there a way to get them side by side (the screen is big enough)?
Once you've called setDevToolsWebContents then you can move the devtools window around just by calling devtools.setPosition(x, y).
Here is a example of moving the devtools next to the window by setting it's position whenever it's moved:
app.on('ready', function () {
var devtools = new BrowserWindow();
var window = new BrowserWindow({width: 800, height: 600});
window.loadURL('https://stackoverflow.com/questions/52178592/how-to-set-the-devtools-window-position-in-electron');
window.webContents.setDevToolsWebContents(devtools.webContents);
window.webContents.openDevTools({mode: 'detach'});
// Set the devtools position when the parent window has finished loading.
window.webContents.once('did-finish-load', function () {
var windowBounds = window.getBounds();
devtools.setPosition(windowBounds.x + windowBounds.width, windowBounds.y);
});
// Set the devtools position when the parent window is moved.
window.on('move', function () {
var windowBounds = window.getBounds();
devtools.setPosition(windowBounds.x + windowBounds.width, windowBounds.y);
});
});

Close all windows on Reload on an Electron Application

I have an electron desktop application which opens 2 new windows when I load it, the code to open the new windows is this:
electron = require('electron')
win = electron.remote.getCurrentWindow();
BrowserWindow = electron.remote.BrowserWindow;
wind = new BrowserWindow({
width: 400,
height: 200,
x:3,
y:12,
frame: false,
// transparent: true,
alwaysOnTop: true, // Add this line
// skipTaskbar:true, // don't show icon on taskbar
opacity:0.9,
})
Now when I'm testing my application, I use the Reload command a lot (ctrl+R on windows). My problem is that when I do it, the windows remain open and it opens more windows on top of it.
How can I make Reload close all windows?
The onbeforeunload event is triggered (In the renderer) when a window is closed or reloaded. You can use this to close the individual window.
Otherwise you can inform electron via a IPC message to close all your windows for you.
Something like this should do the job.
// renderer/index.js
const {ipcRenderer} = require('electron')
ipcRenderer.send('my-closeallwindowsasap-channel') // can have arguments
// -------------------------------------------------------
// main/index.js
ipcMain.on('my-closeallwindowsasap-channel', (event, arg) => {
BrowserWindow.getAllWindows().forEach(window => {
window.close()
})
})

How to restore default window size in an electron app?

Is there a way to restore main window in an electron app to a certain size? To explain what I am trying to accomplish, let me give you an example:
When I open Windows Explorer, it opens with a certain size and at a certain position. Then I maximize that window and close the explorer. Next time when I restart the explorer, it opens in the same state as when I closed it i.e. in maximized state. However when I click on the restore button, explorer restores to the width/height and position before it was maximized.
I would like to accomplish the same in my electron application as well. However that is not happening.
What I am doing is when my application closes, I capture the dimensions (width, height) and position (x, y coordinates) of the application window using (win.getBounds())and save those in a config file using electron-config. This is what my code looks like:
const Config = require('electron-config')
const config = new Config();
mainWindow.on('close', () => {
config.set('winBounds', mainWindow.getBounds())
});
Now when I start the application, I read the settings from the config file (actually electron-config does that for me) and use that to set the initial dimensions/position of the window. I am using code like below:
let opts = {
show: false,
icon: path.join(__dirname, 'app-window-icon.png')
};
Object.assign(opts, config.get('winBounds'));
mainWindow = new BrowserWindow(opts);
This is also working great. However the only option I get now is maximize the window. I'm not able to find any option to restore the window to a size before it was maximized.
For example, let's say the user launches the application with 1024x768 px dimensions. User then maximizes the application window and then closes it. When the user relaunches the application, it opens with the size it was closed and the only option I see is to maximize the window. What I am looking for is an option to restore the window size to 1024x768px.
I looked up the documentation here: https://github.com/electron/electron/blob/master/docs/api/browser-window.md but unfortunately couldn't find anything there.
I used the solution here which involves persisting your windows size and position in electron-settings and it works perfectly.
Include the windowStateKeeper function in your code and then adapt your createMainWindow function as follows:
function createMainWindow() {
const mainWindowStateKeeper = windowStateKeeper('main');
const win = new electron.BrowserWindow({
title: 'main',
x: mainWindowStateKeeper.x,
y: mainWindowStateKeeper.y,
width: mainWindowStateKeeper.width,
height: mainWindowStateKeeper.height
});
mainWindowStateKeeper.track(win);
win.loadURL(`file://${__dirname}/index.html`);
win.on('closed', onClosed);
return win;
}
Here is complete solution:
stateKeeper.ts:
import {screen} from 'electron';
import settings from 'electron-settings';
export const windowStateKeeper = async (windowName) => {
let window, windowState;
const setBounds = async () => {
// Restore from appConfig
if (await settings.has(`windowState.${windowName}`)) {
windowState = await settings.get(`windowState.${windowName}`);
return;
}
const size = screen.getPrimaryDisplay().workAreaSize;
// Default
windowState = {
x: undefined,
y: undefined,
width: size.width / 2,
height: size.height / 2,
};
};
const saveState = async () => {
// bug: lots of save state events are called. they should be debounced
if (!windowState.isMaximized) {
windowState = window.getBounds();
}
windowState.isMaximized = window.isMaximized();
await settings.set(`windowState.${windowName}`, windowState);
};
const track = async (win) => {
window = win;
['resize', 'move', 'close'].forEach((event) => {
win.on(event, saveState);
});
};
await setBounds();
return {
x: windowState.x,
y: windowState.y,
width: windowState.width,
height: windowState.height,
isMaximized: windowState.isMaximized,
track,
};
};
main.ts
import {windowStateKeeper} from './utils/windowStateKeeper';
const mainWindowStateKeeper = await windowStateKeeper('main');
// Create the browser window.
mainWin = new BrowserWindow({
title: 'Desktop',
x: mainWindowStateKeeper.x,
y: mainWindowStateKeeper.y,
width: mainWindowStateKeeper.width,
height: mainWindowStateKeeper.height,
webPreferences: {
nodeIntegration: true,
allowRunningInsecureContent: serve ? true : false,
contextIsolation: false, // false if you want to run e2e test with Spectron
enableRemoteModule: true, // true if you want to run e2e test with Spectron or use remote module in renderer context (ie. Angular)
},
});
// Track window state
mainWindowStateKeeper.track(mainWin);
I implemented this after a lot of testing this is the most accurate and simple solution to remember window properties.
i used electron-store to store values, you can use any storage methods you like.
main.js
let windowConfig = {
width: 1280,
height: 680,
}
function createWindow() {
Object.assign(windowConfig, CONFIG.get("winBounds"))
mainWindow = new BrowserWindow(windowConfig)
if (windowConfig.isMaximized) {
mainWindow.maximize()
}
mainWindow.on("close", () => {
Object.assign(windowConfig, {
isMaximized: mainWindow.isMaximized()
}, mainWindow.getNormalBounds())
CONFIG.set("winBounds", windowConfig) // saves window's properties using electron-store
})
}

getting mouse click screenX and screenY in as3

I want to get mouse click screen coordinates (by clicking outside AIR application window)
I tried the following, but i don't get anything, it seem like the ScreenMouseEvent.CLICK event not dispatched.
public function Main():void
{
if (NativeApplication.supportsSystemTrayIcon)//testExpression return true
{
SystemTrayIcon(NativeApplication.nativeApplication.icon).
addEventListener(ScreenMouseEvent.CLICK, click);
}
}
private function click(e:ScreenMouseEvent):void
{
trace(e.screenX);//nothing displayed :(
}
The ScreenMouseEvent is dispatched by the SystemTrayIcon only (Windows/Linux only). And the SystemTrayIcon instance (DockIcon for MacOs) is retrieved from NativeApplication.nativeApplication.icon.
So this is where you should attach your event listener, after specifying the tray icon graphic:
var sti:SystemTrayIcon = NativeApplication.nativeApplication.icon as SystemTrayIcon;
// Specifying an icon is obligatory on Windows - MacOs has a default icon
sti.bitmaps = [new IconAsset()]; // IconAsset = Embedded picture
sti.addEventListener(ScreenMouseEvent.CLICK, mouseClick);
Note that the resultant screenX and screenY properties of ScreenMouseEvent are confined within the icon area in the tray and not the whole desktop screen (Not surprisingly, since this is where you added the event in the first place).

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