Fix selection flickering when expanding folder.

qml/ClideTreeView.qml

@@ -57,14 +57,8 @@ TreeView {
         indentation: 12
 
         background: Rectangle {
-            color: "transparent"
+            color: current ? RustColors.explorer_text_selected : "transparent"
             radius: 2.5
-
-            Behavior on color {
-                ColorAnimation {
-                    duration: 300
-                }
-            }
         }
         contentItem: Text {
             color: RustColors.explorer_text
@@ -105,7 +99,6 @@ TreeView {
                 const isFile = !treeDelegate.hasChildren;
                 if (isFile)
                     return Qt.lighter(RustColors.explorer_folder, 2);
-
                 const isExpandedFolder = treeDelegate.expanded && treeDelegate.hasChildren;
                 if (isExpandedFolder)
                     return Qt.darker(RustColors.explorer_folder, 2);
@@ -125,12 +118,14 @@ TreeView {
             onSingleTapped: (eventPoint, button) => {
                 switch (button) {
                 case Qt.LeftButton:
-                    fileSystemTreeView.toggleExpanded(treeDelegate.row);
-                    fileSystemTreeView.lastIndex = treeDelegate.index
-                    // If this model item doesn't have children, it means it's
-                    // representing a file.
-                    if (!treeDelegate.hasChildren)
+                    if (treeDelegate.hasChildren) {
+                        fileSystemTreeView.toggleExpanded(treeDelegate.row);
+                        // fileSystemTreeView.lastIndex = treeDelegate.index
+                    } else {
+                        // If this model item doesn't have children, it means it's
+                        // representing a file.
                         fileSystemTreeView.fileClicked(treeDelegate.filePath);
+                    }
                     break;
                 case Qt.RightButton:
                     contextMenu.popup();
@@ -160,4 +155,6 @@ TreeView {
             }
         }
     }
+    selectionModel: ItemSelectionModel {
+    }
 }