fix: MinWidth not work while manually resizing window (#619)

Signed-off-by: leo <[email protected]>

Author: love-linger

src/Views/StashesPage.axaml

@@ -9,7 +9,7 @@
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="SourceGit.Views.StashesPage"
              x:DataType="vm:StashesPage">
-  <Grid>
+  <Grid SizeChanged="OnMainLayoutSizeChanged">
     <Grid.ColumnDefinitions>
       <ColumnDefinition Width="{Binding Source={x:Static vm:Preference.Instance}, Path=Layout.StashesLeftWidth, Mode=TwoWay}" MinWidth="300"/>
       <ColumnDefinition Width="4"/>

src/Views/StashesPage.axaml.cs

@@ -9,6 +9,20 @@ public StashesPage()
             InitializeComponent();
         }
 
+        private void OnMainLayoutSizeChanged(object sender, SizeChangedEventArgs e)
+        {
+            var grid = sender as Grid;
+            if (grid == null)
+                return;
+
+            var layout = ViewModels.Preference.Instance.Layout;
+            var width = grid.Bounds.Width;
+            var maxLeft = width - 304;
+
+            if (layout.StashesLeftWidth.Value - maxLeft > 1.0)
+                layout.StashesLeftWidth = new GridLength(maxLeft, GridUnitType.Pixel);
+        }
+
         private void OnStashContextRequested(object sender, ContextRequestedEventArgs e)
         {
             if (DataContext is ViewModels.StashesPage vm && sender is Border border)

src/Views/WorkingCopy.axaml

@@ -8,7 +8,7 @@
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="600"
              x:Class="SourceGit.Views.WorkingCopy"
              x:DataType="vm:WorkingCopy">
-  <Grid>
+  <Grid SizeChanged="OnMainLayoutSizeChanged">
     <Grid.ColumnDefinitions>
       <ColumnDefinition Width="{Binding Source={x:Static vm:Preference.Instance}, Path=Layout.WorkingCopyLeftWidth, Mode=TwoWay}" MinWidth="300"/>
       <ColumnDefinition Width="5"/>

src/Views/WorkingCopy.axaml.cs

@@ -11,6 +11,20 @@ public WorkingCopy()
             InitializeComponent();
         }
 
+        private void OnMainLayoutSizeChanged(object sender, SizeChangedEventArgs e)
+        {
+            var grid = sender as Grid;
+            if (grid == null)
+                return;
+
+            var layout = ViewModels.Preference.Instance.Layout;
+            var width = grid.Bounds.Width;
+            var maxLeft = width - 304;
+
+            if (layout.WorkingCopyLeftWidth.Value - maxLeft > 1.0)
+                layout.WorkingCopyLeftWidth = new GridLength(maxLeft, GridUnitType.Pixel);
+        }
+
         private void OnOpenCommitMessagePicker(object sender, RoutedEventArgs e)
         {
             if (sender is Button button && DataContext is ViewModels.WorkingCopy vm)