Add download update button (#135)

* add basic button ui

* add button to go to github downloads page

Author: LeftofZen

Gui/ViewModels/MainWindowViewModel.cs

@@ -12,6 +12,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Reactive;
@@ -55,6 +56,7 @@ public class MainWindowViewModel : ViewModelBase
 		public ReactiveCommand<Unit, Task> UseDefaultPalette { get; }
 		public ReactiveCommand<Unit, Task> UseCustomPalette { get; }
 		public ReactiveCommand<Unit, Unit> EditSettingsCommand { get; }
+		public ReactiveCommand<Unit, Process?> OpenDownloadLink { get; }
 
 		public const string GithubApplicationName = "ObjectEditor";
 		public const string GithubIssuePage = "https://github.com/OpenLoco/ObjectEditor/issues";
@@ -69,6 +71,9 @@ public class MainWindowViewModel : ViewModelBase
 		[Reactive]
 		public string LatestVersionText { get; set; } = "Development build";
 
+		[Reactive]
+		public bool IsUpdateAvailable { get; set; }
+
 		const string DefaultPaletteImageString = "avares://ObjectEditor/Assets/palette.png";
 		Image<Rgba32> DefaultPaletteImage { get; init; }
 
@@ -118,6 +123,8 @@ public MainWindowViewModel()
 				Model.Settings.Save(ObjectEditorModel.SettingsFile, Model.Logger);
 			});
 
+			OpenDownloadLink = ReactiveCommand.Create(() => Process.Start(new ProcessStartInfo(GithubLatestReleaseDownloadPage) { UseShellExecute = true }));
+
 			#region Version
 
 			_ = this.WhenAnyValue(o => o.ApplicationVersion)
@@ -137,18 +144,19 @@ public MainWindowViewModel()
 				if (latestVersion > ApplicationVersion)
 				{
 					LatestVersionText = $"newer version exists: {latestVersion}";
+					IsUpdateAvailable = true;
 				}
 				else
 				{
 					LatestVersionText = "latest version";
+					IsUpdateAvailable = false;
 				}
 			}
 			catch (Exception ex)
 			{
 				Model.Logger.Error(ex);
 			}
 #endif
-
 			#endregion
 		}
 

Gui/Views/MainWindow.axaml

@@ -674,7 +674,13 @@
 					<MenuItem Header="Open downloads folder" Command="{Binding OpenDownloadFolder}" />
 				</MenuItem>
 			</Menu>
-			<ToggleSwitch IsChecked="{Binding IsDarkTheme, Mode=TwoWay}" HorizontalAlignment="Right" OnContent="{materialIcons:MaterialIconExt Kind=MoonWaningCrescent}" OffContent="{materialIcons:MaterialIconExt Kind=WeatherSunny}" />
+			<StackPanel HorizontalAlignment="Right" VerticalAlignment="Center" Orientation="Horizontal">
+				<Button Margin="4" Command="{Binding OpenDownloadLink}" IsVisible="{Binding IsUpdateAvailable}" IsEnabled="{Binding IsUpdateAvailable}">
+					New version available!
+				</Button>
+				<Panel Margin="4" Width="32"/>
+				<ToggleSwitch Margin="4" IsChecked="{Binding IsDarkTheme, Mode=TwoWay}" OnContent="{materialIcons:MaterialIconExt Kind=MoonWaningCrescent}" OffContent="{materialIcons:MaterialIconExt Kind=WeatherSunny}" />
+			</StackPanel>
 		</DockPanel>
 		<Expander Header="Logs" Padding="0" ExpandDirection="Down" DockPanel.Dock="Bottom" HorizontalAlignment="Stretch" Margin="8" MaxHeight="512">
 			<ScrollViewer HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Auto">