.NET 创建无边框的跨平台应用
在创建了Photino应用程序以后我们发现它自带了一个标题栏，并且非常丑，我们现在要做的就是去掉这个很丑的自带标题栏，并且自定义一个更好看的，下面我们将用Masa Blazor提供的模板去进行实战。
安装模板
安装Masa Blazor提供的rc2的模板
dotnet new install Masa.Template::1.0.0-rc.2
创建项目
- 打开VS2022 => 新建项目
- 搜索到一下类别!
- 然后创建
Gotrays名称的项目
项目结构
无边框处理
修改Program.cs代码，增加SetChromeless，设置无边框
using Gotrays;
using Microsoft.Extensions.DependencyInjection;
using Photino.Blazor;
internal class Program
{
[STAThread]
private static void Main(string[] args)
{
var appBuilder = PhotinoBlazorAppBuilder.CreateDefault(args);
appBuilder.RootComponents.Add<App>("#app");
appBuilder.Services.AddMasaBlazor();
var app = appBuilder.Build();
app.MainWindow
.SetTitle("Photino Blazor Sample")
.SetChromeless(true);
AppDomain.CurrentDomain.UnhandledException += (sender, error) =>
{
};
app.Run();
}
}
启动以后的效果：
这样就完成了我们的无边框，但是也并不是直接可以使用，你会发现它无法拖动！下面我们将让他可以被拖动
完善无边框拖动
我们需要支持拖动我们的标题栏的时候带动我们的窗口！
下面开始修改代码实现这个逻辑
我们的标题栏的css的样式是m-app-bar
打开wwwroot/index.html并且修改为以下代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport"
content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover" />
<title>Gotrays</title>
<base href="/" />
<link href="_content/Masa.Blazor/css/masa-blazor.min.css" rel="stylesheet">
<link href="css/app.css" rel="stylesheet" />
<link href="Gotrays.styles.css" rel="stylesheet" />
<link href="https://cdn.masastack.com/npm/@mdi/font@7.1.96/css/materialdesignicons.min.css" rel="stylesheet">
<link href="https://cdn.masastack.com/npm/materialicons/materialicons.css" rel="stylesheet">
<link href="https://cdn.masastack.com/npm/fontawesome/v5.0.13/css/all.css" rel="stylesheet">
<style>
#app .m-app-bar {
-webkit-app-region: drag;
}
html {
overflow: hidden;
}
</style>
</head>
<body>
<div class="status-bar-safe-area"></div>
<div id="app">Loading...</div>
<div id="blazor-error-ui">
An unhandled error has occurred.
<a href="" class="reload">Reload</a>
<a class="dismiss">🗙</a>
</div>
<script src="_framework/blazor.webview.js"></script>
<script src="_content/BlazorComponent/js/blazor-component.js"></script>
<script>
let start = false;
let pageX = 0;
let pageY = 0;
document.body.addEventListener('mousedown', evt => {
const { target } = evt;
const appRegion = getComputedStyle(target)['-webkit-app-region'];
const app = document.getElementById("m-app-bar");
app.addEventListener('mousemove', onmousemove)
app.addEventListener("mousedown", (e) => {
console.log(e.pageX, e.pageY);
pageX = e.pageX;
pageY = e.pageY;
start = true;
})
app.addEventListener("mouseup", (e) => {
start = false;
})
console.log("MouseDownDrag", evt, appRegion, app);
if (appRegion === 'drag') {
var data = {
Command: "MouseMove",
Data: {
}
}
evt.preventDefault();
evt.stopPropagation();
}
});
function onmousemove(e) {
if (start) {
console.log("MouseMove", e);
var data = {
"Command": "MouseMove",
X: e.clientX - pageX,
Y: e.clientY - pageY
}
window.external.sendMessage(JSON.stringify(data));
}
}
</script>
</body>
</html>
主要是添加了这个样式文件，注意的是这个相当于标记了哪个可以拖动我们的窗口的标记
<style>
#app .m-app-bar {
-webkit-app-region: drag;
}
html {
overflow: hidden;
}
</style>
下面的js的代码是为了传递窗口拖动参数实现实际的拖动
<script>
let start = false;
let pageX = 0;
let pageY = 0;
document.body.addEventListener('mousedown', evt => {
const { target } = evt;
const appRegion = getComputedStyle(target)['-webkit-app-region'];
const app = document.getElementById("m-app-bar");
app.addEventListener('mousemove', onmousemove)
app.addEventListener("mousedown", (e) => {
console.log(e.pageX, e.pageY);
pageX = e.pageX;
pageY = e.pageY;
start = true;
})
app.addEventListener("mouseup", (e) => {
start = false;
})
console.log("MouseDownDrag", evt, appRegion, app);
if (appRegion === 'drag') {
var data = {
Command: "MouseMove",
Data: {
}
}
evt.preventDefault();
evt.stopPropagation();
}
});
function onmousemove(e) {
if (start) {
console.log("MouseMove", e);
var data = {
"Command": "MouseMove",
X: e.clientX - pageX,
Y: e.clientY - pageY
}
window.external.sendMessage(JSON.stringify(data));
}
}
</script>
修改Program.cs文件的代码支持拖动
using System.Diagnostics;
using Gotrays;
using Microsoft.Extensions.DependencyInjection;
using Photino.Blazor;
using PhotinoNET;
using System.Runtime.InteropServices;
using System.Text.Json;
internal class Program
{
[STAThread]
private static void Main(string[] args)
{
var appBuilder = PhotinoBlazorAppBuilder.CreateDefault(args);
appBuilder.RootComponents.Add<App>("#app");
appBuilder.Services.AddMasaBlazor();
var app = appBuilder.Build();
app.MainWindow
.SetTitle("Photino Blazor Sample")
.SetChromeless(true)
.RegisterWebMessageReceivedHandler(MessageReceived);
AppDomain.CurrentDomain.UnhandledException += (sender, error) =>
{
};
app.Run();
}
private static void MessageReceived(object? sender, string message)
{
var window = sender as PhotinoWindow;
if (message.StartsWith("{"))
{
var data = JsonSerializer.Deserialize<Message>(message);
if (data == null || data.Command != "MouseMove") return;
var left = window.Left + data.X;
var top = window.Top + data.Y;
if (left <= -window.Width / 2)
{
left = -window.Width / 2;
}
if (window.Top < 0)
{
window.Top = 0;
}
window.SetLeft((int)((int)left));
window.SetTop((int)((int)top));
}
}
}
public class Message
{
public string Command { get; set; }
public double X { get; set; }
public double Y { get; set; }
}
代码实现逻辑
-
首先需要定义css样式，这个是相当于指定了哪个元素可以被拖动
#app .m-app-bar { -webkit-app-region: drag; } -
然后定义js脚本，通过js去监听拖动的事件然后计算坐标，将计算好的坐标传递到c#的事件中完成实际的窗体拖动事件
let start = false; let pageX = 0; let pageY = 0; document.body.addEventListener('mousedown', evt => { const { target } = evt; const appRegion = getComputedStyle(target)['-webkit-app-region']; const app = document.getElementById("m-app-bar"); app.addEventListener('mousemove', onmousemove) app.addEventListener("mousedown", (e) => { pageX = e.pageX; pageY = e.pageY; start = true; }) app.addEventListener("mouseup", (e) => { start = false; }) if (appRegion === 'drag') { var data = { Command: "MouseMove", Data: { } } evt.preventDefault(); evt.stopPropagation(); } }); function onmousemove(e) { if (start) { console.log("MouseMove", e); var data = { "Command": "MouseMove", X: e.clientX - pageX, Y: e.clientY - pageY } window.external.sendMessage(JSON.stringify(data)); } }当id为
m-app-bar的元素被鼠标按下的时候对于pageX = e.pageX，pageY = e.pageY，start = true三个值赋值，start表示鼠标按下并且启动拖动，pageX和pageY则是鼠标首次按下坐标当元素被
mousedown触发将拖动的坐标和首次点击的坐标相减，然后就可以通过window.external.sendMessage传递到c#的代码块中，先判断Message的数据是否为json，如果是则转换模型，然后计算设置实际窗体的位置即可private static void MessageReceived(object? sender, string message) { var window = sender as PhotinoWindow; if (message.StartsWith("{")) { var data = JsonSerializer.Deserialize<Message>(message); if (data == null || data.Command != "MouseMove") return; var left = window.Left + data.X; var top = window.Top + data.Y; if (left <= -window.Width / 2) { left = -window.Width / 2; } if (window.Top < 0) { window.Top = 0; } window.SetLeft((int)((int)left)); window.SetTop((int)((int)top)); } }效果
结尾
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