Improved preview window, swatches alignment and grid lines

PixiEditor/Views/UserControls/DrawingViewPort.xaml

@@ -114,7 +114,7 @@
                         <Rectangle.Fill>
                             <VisualBrush Viewport="{Binding Height, Converter={StaticResource IntToViewportRectConverter}}" ViewboxUnits="Absolute" TileMode="Tile" >
                                 <VisualBrush.Visual>
-                                    <Line  X1="0" Y1="0" X2="1" Y2="0" Stroke="White" StrokeThickness="0.01"/>
+                                    <Line  X1="0" Y1="0" X2="1" Y2="0" Stroke="White" StrokeThickness="0.02"/>
                                 </VisualBrush.Visual>
                             </VisualBrush>
                         </Rectangle.Fill>
@@ -123,7 +123,7 @@
                         <Rectangle.Fill>
                             <VisualBrush Viewport="{Binding Width, Converter={StaticResource IntToViewportRectConverter}, ConverterParameter=vertical}" ViewboxUnits="Absolute" TileMode="Tile" >
                                 <VisualBrush.Visual>
-                                    <Line  X1="0" Y1="0" X2="0" Y2="1" Stroke="White" StrokeThickness="0.01"/>
+                                    <Line  X1="0" Y1="0" X2="0" Y2="1" Stroke="White" StrokeThickness="0.02"/>
                                 </VisualBrush.Visual>
                             </VisualBrush>
                         </Rectangle.Fill>

PixiEditor/Views/UserControls/PreviewWindow.xaml

@@ -20,7 +20,7 @@
             <RowDefinition Height="Auto"/>
         </Grid.RowDefinitions>
         
-        <Viewbox Margin="30" VerticalAlignment="Top">
+        <Viewbox Margin="30" VerticalAlignment="Center">
             <Grid x:Name="imageGrid" RenderOptions.BitmapScalingMode="NearestNeighbor"
               Visibility="{Binding Document, Converter={StaticResource NullToVisibiltyConverter}, ElementName=uc}"
               Height="{Binding Document.Height, ElementName=uc}" Width="{Binding Document.Width, ElementName=uc}"
@@ -106,7 +106,7 @@
                     </ComboBoxItem>
                     <ComboBoxItem Content="Checkered">
                         <ComboBoxItem.Tag>
-                            <ImageBrush Viewport="0, 0, 0.05, 0.05" ImageSource="/Images/CheckerTile.png" TileMode="Tile" Stretch="Uniform"/>
+                            <ImageBrush Viewport="0, 0.05, 0.05, 0.05" ImageSource="/Images/CheckerTile.png" TileMode="Tile"/>
                         </ComboBoxItem.Tag>
                     </ComboBoxItem>
                     <ComboBoxItem Content="Black">

PixiEditor/Views/UserControls/SwatchesView.xaml

@@ -22,7 +22,7 @@
             <ItemsControl.ItemsPanel>
                 <ItemsPanelTemplate>
                     <WrapPanel Margin="10,10,0,10" Orientation="Horizontal"
-                               HorizontalAlignment="Center" VerticalAlignment="Top"/>
+                               HorizontalAlignment="Left" VerticalAlignment="Top"/>
                 </ItemsPanelTemplate>
             </ItemsControl.ItemsPanel>
             <ItemsControl.ItemTemplate>