Merge pull request #1064 from AvaloniaUI/add-context-menu-to-control-catalog

add a context menu to the control catalog.

samples/ControlCatalog/Pages/MenuPage.xaml

@@ -31,5 +31,28 @@
         </MenuItem>
       </Menu>
     </StackPanel>
+
+    <TextBlock Classes="h2" Text="A context menu (right click)">
+      <TextBlock.ContextMenu>
+        <ContextMenu>
+          <MenuItem Header="Standard _Menu Item"/>
+          <Separator/>
+          <MenuItem Header="Menu with _Submenu">
+            <MenuItem Header="Submenu _1"/>
+            <MenuItem Header="Submenu _2"/>
+          </MenuItem>
+          <MenuItem Header="Menu Item with _Icon">
+            <MenuItem.Icon>
+              <Image Source="resm:ControlCatalog.Assets.github_icon.png"/>
+            </MenuItem.Icon>
+          </MenuItem>
+          <MenuItem Header="Menu Item with _Checkbox">
+            <MenuItem.Icon>
+              <CheckBox BorderThickness="0" IsHitTestVisible="False" IsChecked="True"/>
+            </MenuItem.Icon>
+          </MenuItem>
+        </ContextMenu>
+      </TextBlock.ContextMenu>
+    </TextBlock>
   </StackPanel>
 </UserControl>