修复报告页面图像自适应的问题

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);

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">