Fix: tooltip in replace mode

Author: OidaTiftla

ICSharpCode.AvalonEdit/Search/SearchPanel.cs

@@ -45,6 +45,7 @@ public class SearchPanel : Control {
         SearchResultBackgroundRenderer renderer;
         TextBox searchTextBox;
         TextBox replaceTextBox;
+        Border searchPanel;
         SearchPanelAdorner adorner;
 
         #region DependencyProperties
@@ -294,6 +295,7 @@ void textArea_Document_TextChanged(object sender, EventArgs e) {
         /// <inheritdoc/>
         public override void OnApplyTemplate() {
             base.OnApplyTemplate();
+            searchPanel = Template.FindName("PART_searchPanel", this) as Border;
             searchTextBox = Template.FindName("PART_searchTextBox", this) as TextBox;
             replaceTextBox = Template.FindName("PART_replaceTextBox", this) as TextBox;
         }
@@ -405,7 +407,7 @@ void DoSearch(bool changeSelection) {
                 if (!renderer.CurrentResults.Any()) {
                     messageView.IsOpen = true;
                     messageView.Content = Localization.NoMatchesFoundText;
-                    messageView.PlacementTarget = searchTextBox;
+                    messageView.PlacementTarget = searchPanel;
                 } else
                     messageView.IsOpen = false;
             }
@@ -436,7 +438,7 @@ void SearchLayerKeyDown(object sender, KeyEventArgs e) {
                             var error = Validation.GetErrors(searchTextBox).FirstOrDefault();
                             if (error != null) {
                                 messageView.Content = Localization.ErrorText + " " + error.ErrorContent;
-                                messageView.PlacementTarget = searchTextBox;
+                                messageView.PlacementTarget = searchPanel;
                                 messageView.IsOpen = true;
                             }
                         }

ICSharpCode.AvalonEdit/Search/SearchPanel.xaml

@@ -7,7 +7,7 @@
                     <ControlTemplate.Resources>
                         <BooleanToVisibilityConverter x:Key="booleanToVisibilityConverter"/>
                     </ControlTemplate.Resources>
-                    <Border Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}" BorderBrush="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}" BorderThickness="1" HorizontalAlignment="Right" VerticalAlignment="Top" Cursor="Arrow">
+                    <Border Name="PART_searchPanel" Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}" BorderBrush="{DynamicResource {x:Static SystemColors.WindowTextBrushKey}}" BorderThickness="1" HorizontalAlignment="Right" VerticalAlignment="Top" Cursor="Arrow">
                         <StackPanel Orientation="Vertical">
                             <StackPanel Orientation="Horizontal">
                                 <TextBox Name="PART_searchTextBox" Focusable="True" Width="150" Height="24" Margin="3,3,3,0" TabIndex="0">