From bc8a0eadfb44e40db5b7e2827e5cfc6b6ca6214c Mon Sep 17 00:00:00 2001
From: "zhengxuan.zhang" <zhengxuan.zhang@hexagon.com>
Date: Fri, 15 May 2026 11:00:18 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E6=8A=A5=E5=91=8A=E9=A1=B5?=
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---
 XplorePlane/Controls/ZoomableImageViewer.cs | 36 ++++++---------------
 XplorePlane/Themes/Generic.xaml             |  2 +-
 2 files changed, 10 insertions(+), 28 deletions(-)

diff --git a/XplorePlane/Controls/ZoomableImageViewer.cs b/XplorePlane/Controls/ZoomableImageViewer.cs
index 8e920ee..ac931ed 100644
--- a/XplorePlane/Controls/ZoomableImageViewer.cs
+++ b/XplorePlane/Controls/ZoomableImageViewer.cs
@@ -237,33 +237,13 @@ namespace XplorePlane.Controls
 
         private void ExecuteFitToView()
         {
-            if (_imageElement == null || _containerBorder == null || Source == null)
+            if (_imageElement == null || Source == null)
                 return;
 
-            double containerWidth = _containerBorder.ActualWidth;
-            double containerHeight = _containerBorder.ActualHeight;
-
-            if (containerWidth <= 0 || containerHeight <= 0)
-                return;
-
-            double imageWidth = Source.PixelWidth;
-            double imageHeight = Source.PixelHeight;
-
-            if (imageWidth <= 0 || imageHeight <= 0)
-                return;
-
-            // Calculate scale to fit
-            double scaleX = containerWidth / imageWidth;
-            double scaleY = containerHeight / imageHeight;
-            double scale = Math.Min(scaleX, scaleY);
-
-            // Clamp to min/max
-            scale = Math.Max(MinScale, Math.Min(MaxScale, scale));
-
-            _scaleTransform.ScaleX = scale;
-            _scaleTransform.ScaleY = scale;
-
-            // Center the image
+            // With Stretch="Uniform", the Image control already fits the image to the container.
+            // FitToView simply resets the transform to identity (scale=1, translate=0).
+            _scaleTransform.ScaleX = 1.0;
+            _scaleTransform.ScaleY = 1.0;
             _translateTransform.X = 0;
             _translateTransform.Y = 0;
         }
@@ -279,8 +259,10 @@ namespace XplorePlane.Controls
             if (containerWidth <= 0 || containerHeight <= 0)
                 return;
 
-            double imageWidth = Source.PixelWidth * _scaleTransform.ScaleX;
-            double imageHeight = Source.PixelHeight * _scaleTransform.ScaleY;
+            // With Stretch="Uniform", the Image control's ActualWidth/Height represents
+            // the displayed size at scale=1. Multiply by current scale for actual rendered size.
+            double imageWidth = _imageElement.ActualWidth * _scaleTransform.ScaleX;
+            double imageHeight = _imageElement.ActualHeight * _scaleTransform.ScaleY;
 
             // Calculate bounds
             double maxOffsetX = Math.Max(0, (imageWidth - containerWidth) / 2);
diff --git a/XplorePlane/Themes/Generic.xaml b/XplorePlane/Themes/Generic.xaml
index 547a088..4347305 100644
--- a/XplorePlane/Themes/Generic.xaml
+++ b/XplorePlane/Themes/Generic.xaml
@@ -143,7 +143,7 @@
                                 VerticalAlignment="Center"
                                 RenderOptions.BitmapScalingMode="HighQuality"
                                 Source="{TemplateBinding Source}"
-                                Stretch="None" />
+                                Stretch="Uniform" />
 
                             <!--  Fallback Placeholder  -->
                             <Grid x:Name="PART_Placeholder" Visibility="Collapsed">