CODEWITHSUNDEEP
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deltavin
deltavin

Reputation: 365

How to set default size of macos app in flutter?

I am trying to build a macOS desktop app with flutter. I want the app to be full-width, edge-to-edge. However, when I run the app via the simulator, or after the build, it always launches the app with size 800x600.

I have set the height and width of the root container to double.infinity. In fact, even if I set the height and width to 10.0, it always launches the app with 800x600. I am new to flutter, so probably missing some fundamentals. Most tutorials I have come across talk about building a mobile app where this is never a problem because the app always launches to its full width.

Here is my entire test app code:

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: BoxDecoration(color: Colors.white),
      height: double.infinity,
      width: double.infinity,
      child: Center(
        child: Text(
          'Hello World',
          textDirection: TextDirection.ltr,
          style: TextStyle(
              fontSize: 32, fontWeight: FontWeight.bold, color: Colors.black),
        ),
      ),
    );
  }
}

Upvotes: 24

Views: 16528

Answers (8)

Esmaeil Ahmadipour
Esmaeil Ahmadipour

Reputation: 1192

i need set default size for windows desktop app and this solution worked for me and cover the ios and linux platforms.

import 'package:desktop_window/desktop_window.dart'as window_size;
import 'dart:io';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  if (Platform.isWindows || Platform.isLinux || Platform.isMacOS) {
    window_size.DesktopWindow.setMinWindowSize(Size(375, 750));
    window_size.DesktopWindow.setMaxWindowSize(Size(600, 1000));
  }
  runApp(MyApp());
}

Upvotes: 4

luisredondo
luisredondo

Reputation: 53

You can go to macos/Runner/MainFlutterWindow.swift and add the following:

import Cocoa
import FlutterMacOS

class MainFlutterWindow: NSWindow {
  override func awakeFromNib() {
    let flutterViewController = FlutterViewController()
    let windowFrame = self.frame
    self.contentViewController = flutterViewController
    self.setFrame(windowFrame, display: true)

    // Add this line
    self.minSize = NSSize(width: yourWidth, height: yourHeight)

    RegisterGeneratedPlugins(registry: flutterViewController)

    super.awakeFromNib()
  }
}

And that's it!

Upvotes: 2

Konrad
Konrad

Reputation: 1403

To set the default window size for macOS you neither need a plugin nor do you have to use XCode.

Just open macos/Runner/Base.lproj/MainMenu.xib in your IDE. There's a <window> tag at the end of the file. Look for the one or two size definitions in the <rect> sub tags and change them to your preferred initial size.

<window title="APP_NAME" ...>
    <windowStyleMask .../>
    <rect key="contentRect" x="335" y="390" width="800" height="600"/>
    <rect key="screenRect" x="0.0" y="0.0" width="2560" height="1577"/>
    <view key="contentView" wantsLayer="YES">
        <rect key="frame" x="0.0" y="0.0" width="800" height="600"/>
        <autoresizingMask key="autoresizingMask"/>
    </view>
</window>

Upvotes: 11

C&#237;cero Moura
C&#237;cero Moura

Reputation: 2333

This package can help with it.

    Size size = await DesktopWindow.getWindowSize();
    print(size);
    await DesktopWindow.setWindowSize(Size(500,500));

    await DesktopWindow.setMinWindowSize(Size(400,400));
    await DesktopWindow.setMaxWindowSize(Size(800,800));

    await DesktopWindow.resetMaxWindowSize();
    await DesktopWindow.toggleFullScreen();
    bool isFullScreen = await DesktopWindow.getFullScreen();
    await DesktopWindow.setFullScreen(true);
    await DesktopWindow.setFullScreen(false);

Upvotes: 3

karora
karora

Reputation: 1303

There's now a plugin to do this, which is not a permanent thing as it is described as preliminary functionality before eventually being folded into the core libraries.

Using the plugin for now is still likely to be better than hard-coding directly modifying the native code, especially if you have multiple platforms you want to work on.

First add to the pubspec.yaml something like:

dependencies:
  ...
  window_size:
    git:
      url: git://github.com/google/flutter-desktop-embedding.git
      path: plugins/window_size
      ref: 927f8cbc09b35d85245c095f2db8df9b186f6618

Using the specific Git reference to include this, as shown above, will give you good control over when you choose to pull updated code and make any changes this might entail.

You can then access various functions to set min/max window sizes, or frame, or get the current values, e.g.:

...
import 'dart:io'
import 'package:window_size/window_size.dart';
...
void main() {
  WidgetsFlutterBinding.ensureInitialized();
  if (Platform.isWindows || Platform.isLinux || Platform.isMacOS) {
    setWindowTitle("My Desktop App");
    setWindowMinSize(Size(375, 750));
    setWindowMaxSize(Size(600, 1000));
  }
  runApp(MyApp());
}

I hope this helps someone. I'll try and update this post when the real answer comes out. It seems likely that the interface will approximate what is presented in this library, but the feature set is likely to undergo some change.

Upvotes: 14

Maks
Maks

Reputation: 7935

You should be able to achieve this now within Dart code by using the window_size plugin.

The code to set initial window size could be something like:

 @override
  void initState() {
    super.initState();
    setWindowFrame(Rect.fromLTRB(1200.0, 500.0, 1800.0, 1125.0));
  }

somewhere like your top-level stateful widget. Though I should note that at the moment for me on Linux, the window frame sizing works, but positioning doesn't.

Upvotes: 2

TomRavn
TomRavn

Reputation: 1244

I am not sure if this 100% valid, but I was looking for possibility to set window size. I have found package as @karora mentioned, but I wanted to only set window size and move on. So we can make it using xcode.

In project folder open Runner.xcodeproj:

macos -> Runner.xcodeproj

enter image description here

Then in Xcode project find MainMenu.xib then you can resize your flutter window. enter image description here

Upvotes: 12

smorgan
smorgan

Reputation: 21599

Currently the only way to control the initial size is in native code (follow these issues: 1 and 2 to find out when that changes). You'd most likely want to set it in macos/Runner/MainFlutterWindow.swift.

It's not clear from your description whether you want to launch into full-screen mode, or just have a standard window the size of the client area of the screen; the code involved would be different depending on which you are trying to accomplish.

Upvotes: 6

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