Bezaleel Ashefor knightbenax

Reliable mouseEnter/Exit for SwiftUI

On Mac, SwiftUI's .onHover closure is not always called on mouse exit, particularly with high cursor velocity. A grid of targets or with finer target shapes will often have multiple targets falsely active after the mouse has moved on.

It is easy to run back to AppKit's safety. Below is a SwiftUI-like modifier for reliable mouse-tracking. You can easily adapt it for other mouse tracking needs.

import SwiftUI

	import SwiftUI

	extension View {
	/// Proposes a percentage of its received proposed size to `self`.
	///
	/// This modifier multiplies the proposed size it receives from its parent
	/// with the given factors for width and height.
	///
	/// If the parent proposes `nil` or `.infinity` to us in any dimension,
	/// we’ll forward these values to our child view unchanged.

	def localProperties = new Properties()
	def localPropertiesFile = rootProject.file('local.properties')
	if (localPropertiesFile.exists()) {
	localPropertiesFile.withReader('UTF-8') { reader ->
	localProperties.load(reader)
	}
	}

	def flutterRoot = localProperties.getProperty('flutter.sdk')
	if (flutterRoot == null) {

	//
	// SnappyWindow.swift
	// A NSWindow that snaps to corners
	//
	// Created by Alasdair Monk on 03/02/2021.
	//

	import Foundation
	import Cocoa

	import 'package:flutter/material.dart';

	class OverlayWithHole extends StatelessWidget {
	@override
	Widget build(BuildContext context) {
	return Scaffold(
	appBar: AppBar(title: Text("Flutterclutter: Holes")),
	body: _getExperimentOne()
	);
	}

	import Foundation
	import AVFoundation

	@objc
	protocol CameraCaptureDelegate: class {
	func captureVideoOutput(sampleBuffer: CMSampleBuffer)
	@objc optional func captureAudioOutput(sampleBuffer: CMSampleBuffer)
	}

	class CameraManager: NSObject {

	import Cocoa

	// Representation of a pixel
	struct Pixel {
	var a: UInt8
	var r: UInt8
	var g: UInt8
	var b: UInt8
	}

	/**
	* Setting the padding on the BottomAppBar instead clips out the menuview for some
	* reasons. Feel it's a bug.
	*
	* So instead would just get the ActionMenuView which houses the menu and apply the
	* padding to that instead.
	*
	* Reuben 1. Google 0.
	* **/
	for(int i = 0; i < bottomAppBar.getChildCount(); ++i) {

	import Accelerate.vImage

	func getImageBuffer(from pixelBuffer: CVPixelBuffer) -> vImage_Buffer? {
	var buffer = vImage_Buffer()
	let bitmapInfo = CGBitmapInfo(rawValue: CGBitmapInfo.byteOrder32Little.rawValue \| CGImageAlphaInfo.first.rawValue)
	var cgFormat = vImage_CGImageFormat(bitsPerComponent: 8,
	bitsPerPixel: 32,
	colorSpace: nil,
	bitmapInfo: bitmapInfo,
	version: 0,

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8" />
	<title>Add React in One Minute</title>
	</head>
	<body>

	<h2>Add React in One Minute</h2>
	<p>This page demonstrates using React with no build tooling.</p>