Pixel grid

Minint/Controls/PixelCanvas.cs

@@ -125,7 +125,7 @@ public class PixelCanvas : Control
         RenderOptions.SetBitmapInterpolationMode(this, BitmapInterpolationMode.None);
         context.DrawImage(bmp, srcRect, destRect);
 
-        if (ShowGrid && _viewport.Zoom >= 4)
+        if (ShowGrid)
             DrawPixelGrid(context, imgW, imgH);
 
         DrawToolPreview(context, imgW, imgH);
@@ -167,7 +167,11 @@ public class PixelCanvas : Control
 
     private void DrawPixelGrid(DrawingContext context, int imgW, int imgH)
     {
-        var pen = new Pen(new SolidColorBrush(Color.FromArgb(60, 255, 255, 255)), 1);
+        double zoom = _viewport.Zoom;
+        if (zoom < 4) return;
+
+        var pen = new Pen(Brushes.Black, 1);
+
         var clip = new Rect(0, 0, Bounds.Width, Bounds.Height);
         var imgRect = _viewport.ImageScreenRect(imgW, imgH);
         var visible = imgRect.Intersect(clip);
@@ -185,12 +189,14 @@ public class PixelCanvas : Control
             for (int px = startPx; px <= endPx; px++)
             {
                 var (sx, _) = _viewport.PixelToScreen(px, 0);
-                context.DrawLine(pen, new Point(sx, visible.Top), new Point(sx, visible.Bottom));
+                double x = Math.Floor(sx) + 0.5;
+                context.DrawLine(pen, new Point(x, visible.Top), new Point(x, visible.Bottom));
             }
             for (int py = startPy; py <= endPy; py++)
             {
                 var (_, sy) = _viewport.PixelToScreen(0, py);
-                context.DrawLine(pen, new Point(visible.Left, sy), new Point(visible.Right, sy));
+                double y = Math.Floor(sy) + 0.5;
+                context.DrawLine(pen, new Point(visible.Left, y), new Point(visible.Right, y));
             }
         }
     }

Minint/Views/MainWindow.axaml

@@ -45,7 +45,7 @@
             </MenuItem>
             <MenuItem Header="_View">
                 <MenuItem Header="Pixel _Grid" ToggleType="CheckBox"
-                          IsChecked="{Binding Editor.ShowGrid}" HotKey="Ctrl+G"/>
+                          IsChecked="{Binding Editor.ShowGrid, Mode=TwoWay}" HotKey="Ctrl+G"/>
             </MenuItem>
         </Menu>