70 lines
2.2 KiB
C#
70 lines
2.2 KiB
C#
using Elwig.Helpers;
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using System;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Input;
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namespace Elwig.Windows {
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public abstract class ContextWindow : Window {
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private bool _lockContext = false;
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protected bool LockContext {
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get => _lockContext;
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set {
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_lockContext = value;
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if (!_lockContext && _renewPending) {
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Dispatcher.BeginInvoke(async () => await EnsureContextRenewed());
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}
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}
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}
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private bool _renewPending = false;
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private readonly RoutedCommand CtrlR = new("CtrlR", typeof(ContextWindow), [new KeyGesture(Key.R, ModifierKeys.Control)]);
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private readonly RoutedCommand F5 = new("F5", typeof(ContextWindow), [new KeyGesture(Key.F5)]);
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public ContextWindow() : base() {
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CommandBindings.Add(new CommandBinding(CtrlR, ForceContextReload));
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CommandBindings.Add(new CommandBinding(F5, ForceContextReload));
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Loaded += OnLoaded;
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}
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public async void ForceContextReload(object sender, EventArgs evt) {
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await ForceContextReload();
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}
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public async Task ForceContextReload() {
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HintContextChange();
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await TryContextReload();
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}
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public void HintContextChange() {
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_renewPending = true;
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}
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public async Task TryContextReload() {
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if (LockContext) return;
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await EnsureContextRenewed();
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}
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protected async void OnLoaded(object? sender, RoutedEventArgs? evt) {
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Mouse.OverrideCursor = Cursors.AppStarting;
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using var ctx = new AppDbContext();
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await OnRenewContext(ctx);
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await OnInit(ctx);
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Mouse.OverrideCursor = null;
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}
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protected async Task EnsureContextRenewed() {
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if (!_renewPending) return;
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_renewPending = false;
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using var ctx = new AppDbContext();
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await OnRenewContext(ctx);
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}
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virtual protected async Task OnInit(AppDbContext ctx) { }
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abstract protected Task OnRenewContext(AppDbContext ctx);
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}
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}
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