fixed crash on double-click of empty games library

Asnivor · Oct 11, 2016 · c6fdc05 · c6fdc05
1 parent a9fc600
commit c6fdc05
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Showing 2 changed files with 64 additions and 3 deletions.
diff --git a/MedLaunch/MainWindow.xaml b/MedLaunch/MainWindow.xaml
@@ -278,9 +278,9 @@
                                      Controls:TextBoxHelper.Watermark="Dynamic Search" />
                             <GridSplitter Grid.Row="1" Height="5" HorizontalAlignment="Stretch" />
 
-                            <DataGrid Background="Transparent" MouseDoubleClick="LaunchRom_Click" Grid.Row="2" Name="dgGameList" IsReadOnly="True" SelectionChanged="dgGameList_SelectionChanged" SelectionMode="Single" ContextMenuOpening="dgGameList_ContextMenuOpening">
+                            <DataGrid PreviewMouseRightButtonDown="DataGrid_PreviewMouseRightButtonDown" Background="Transparent" MouseDoubleClick="LaunchRom_Click" Grid.Row="2" Name="dgGameList" IsReadOnly="True" SelectionChanged="dgGameList_SelectionChanged" SelectionMode="Single" >
                                 <DataGrid.ContextMenu>
-                                    <ContextMenu>
+                                    <ContextMenu x:Name="dgContext">
                                         <MenuItem x:Name="LaunchRom" Header="Play Game" Click="LaunchRom_Click" />
                                         <MenuItem Header="Favorites" Click="MenuItemFavorite_Click" />
                                         <MenuItem Header="Copy Launch String to Clipboard" Click="CopyLaunchStringToClipboard_Click" />

diff --git a/MedLaunch/MainWindow.xaml.cs b/MedLaunch/MainWindow.xaml.cs
@@ -30,6 +30,8 @@
 using System.Diagnostics;
 using System.Runtime.InteropServices;
 using Microsoft.Win32;
+using System.Globalization;
+using System.Windows.Controls.Primitives;
 
 namespace MedLaunch
 {
@@ -1316,9 +1318,21 @@ private void dgGameList_ContextMenuOpening(object sender, ContextMenuEventArgs e
             FrameworkElement fe = e.Source as FrameworkElement;
             ContextMenu cm = fe.ContextMenu;
 
+            ContextMenu c = (ContextMenu)this.FindName("dgContext");
+
             // get selected row data
             DataGridGamesView drv = (DataGridGamesView)dgGameList.SelectedItem;
+            if (drv == null)
+            {
+                c = (ContextMenu)this.FindName("dgContext");
+                //c.Visibility = Visibility.Collapsed;
+                //c.IsOpen = false;
+                return;
+            }
+           // c.Visibility = Visibility.Visible;
 
+
+            //MessageBox.Show(drv.ID.ToString());
             string romName = drv.Game;
             int romId = drv.ID;
 
@@ -1347,6 +1361,9 @@ private void dgGameList_ContextMenuOpening(object sender, ContextMenuEventArgs e
                     mi.Header = "Delete From Games Library"; // + romName;
                 }
             }
+
+
+
 
             //fe.ContextMenu = CMenu.BuildGamesMenu(dgGameList);
         }
@@ -1384,6 +1401,8 @@ private void CopyLaunchStringToClipboard_Click(object sender, RoutedEventArgs e)
         private async void LaunchRom_Click(object sender, RoutedEventArgs e)
         {
             DataGridGamesView drv = (DataGridGamesView)dgGameList.SelectedItem;
+            if (drv == null)
+                return;
             int romId = drv.ID;
 
             // create new GameLauncher instance
@@ -1774,6 +1793,48 @@ private void btnSettingsCancelAllChanges_Click(object sender, RoutedEventArgs e)
 
         }
 
-
+        public class OneReturnsTrueConverter : IValueConverter
+        {
+            public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+            {
+                return (int)value == 1;
+            }
+
+            public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+            {
+                throw new NotSupportedException();
+            }
+        }
+
+        private void DataGrid_PreviewMouseRightButtonDown(object sender, MouseButtonEventArgs e)
+        {
+            DependencyObject DepObject = (DependencyObject)e.OriginalSource;
+
+            while ((DepObject != null) && !(DepObject is DataGridColumnHeader))
+            {
+                DepObject = VisualTreeHelper.GetParent(DepObject);
+            }
+
+            if (DepObject == null)
+            {
+                return;
+            }
+            if (DepObject is DataGridRow)
+            {
+                dgGameList.ContextMenu.Visibility = Visibility.Visible;
+                return;
+            }
+
+                if (DepObject is DataGridColumnHeader)
+            {
+                dgGameList.ContextMenu.Visibility = Visibility.Collapsed;
+            }
+            else
+            {
+                dgGameList.ContextMenu.Visibility = Visibility.Visible;
+            }
+        }
+
+
     }
 }