fixes #106

qfluentwidgets/_rc/qss/dark/tree_view.qss

@@ -5,6 +5,7 @@ QTreeView {
     outline: 0;
     padding-right: 5px;
     font: 13px 'Segoe UI', 'Microsoft YaHei';
+    selection-background-color: transparent;
 }
 
 QTreeView::item {

qfluentwidgets/_rc/qss/light/tree_view.qss

@@ -5,6 +5,7 @@ QTreeView {
     outline: 0;
     padding-right: 5px;
     font: 13px 'Segoe UI', 'Microsoft YaHei';
+    selection-background-color: transparent;
 }
 
 QTreeView::item {

qfluentwidgets/components/widgets/combo_box.py

 # coding:utf-8
-from typing import Dict, Union, List, Iterable
+from typing import Union, List, Iterable
 
-from PyQt5.QtCore import Qt, pyqtSignal, QRect, QRectF, QPoint, QObject, QEvent
-from PyQt5.QtGui import QColor, QPainter, QCursor, QIcon
-from PyQt5.QtWidgets import QAction, QPushButton, QWidget, QStyledItemDelegate, QStyle
+from PyQt5.QtCore import Qt, pyqtSignal, QRectF, QPoint, QObject, QEvent
+from PyQt5.QtGui import QPainter, QCursor, QIcon
+from PyQt5.QtWidgets import QAction, QPushButton, QStyledItemDelegate, QStyle
 
 from .menu import RoundMenu
 from .line_edit import LineEdit, LineEditButton
@@ -59,7 +59,6 @@ class ComboBoxBase(QObject):
         self.isHover = False
         self.isPressed = False
         self.items = []     # type: List[ComboItem]
-        self.itemMap = {}   # type: Dict[str, ComboItem]
         self._currentIndex = -1
         self.dropMenu = None
 
@@ -89,11 +88,7 @@ class ComboBoxBase(QObject):
 
         icon: str | QIcon | FluentIconBase
         """
-        if not text or text in self.itemMap:
-            return
-
         item = ComboItem(text, icon, userData)
-        self.itemMap[text] = item
         self.items.append(item)
 
     def addItems(self, texts: Iterable[str]):
@@ -114,9 +109,7 @@ class ComboBoxBase(QObject):
         if not 0 <= index < len(self.items):
             return
 
-        item = self.items[index]
         self.items.pop(index)
-        self.itemMap.pop(item.text)
 
         if index < self.currentIndex():
             self._onItemClicked(self._currentIndex - 1)
@@ -170,12 +163,14 @@ class ComboBoxBase(QObject):
         text: str
             text displayed in combo box
         """
-        if text not in self.itemMap or text == self.currentText():
+        if text == self.currentText():
             return
 
-        self.setCurrentIndex(self.items.index(self.itemMap[text]))
+        index = self.findText(text)
+        if index >= 0:
+            self.setCurrentIndex(index)
 
-    def setItemText(self, index, text):
+    def setItemText(self, index: int, text: str):
         """ set the text of item
 
         Parameters
@@ -186,12 +181,10 @@ class ComboBoxBase(QObject):
         text: str
             new text of item
         """
-        if text in self.itemMap or not 0 <= index < len(self.items):
+        if not 0 <= index < len(self.items):
             return
 
-        item = self.itemMap.pop()
-        item.text = text
-        self.itemMap[text] = item
+        self.items[index].text = text
         if self.currentIndex() == index:
             self.setText(text)
 
@@ -236,10 +229,11 @@ class ComboBoxBase(QObject):
 
     def findText(self, text: str):
         """ Returns the index of the item containing the given text; otherwise returns -1. """
-        if text not in self.itemMap:
-            return -1
+        for i, item in enumerate(self.items):
+            if item.text == text:
+                return i
 
-        return self.items.index(self.itemMap[text])
+        return -1
 
     def clear(self):
         """ Clears the combobox, removing all items. """
@@ -247,7 +241,6 @@ class ComboBoxBase(QObject):
             self.setText('')
 
         self.items.clear()
-        self.itemMap.clear()
         self._currentIndex = -1
 
     def count(self):
@@ -256,12 +249,8 @@ class ComboBoxBase(QObject):
 
     def insertItem(self, index: int, text: str, icon: Union[str, QIcon, FluentIconBase] = None, userData=None):
         """ Inserts item into the combobox at the given index. """
-        if not text or text in self.itemMap:
-            return
-
         item = ComboItem(text, icon, userData)
         self.items.insert(index, item)
-        self.itemMap[text] = item
 
         if index <= self.currentIndex():
             self._onItemClicked(self.currentIndex() + 1)
@@ -270,12 +259,8 @@ class ComboBoxBase(QObject):
         """ Inserts items into the combobox, starting at the index specified. """
         pos = index
         for text in texts:
-            if not text or text in self.itemMap:
-                continue
-
             item = ComboItem(text)
             self.items.insert(pos, item)
-            self.itemMap[text] = item
             pos += 1
 
         if index <= self.currentIndex():
@@ -381,16 +366,30 @@ class EditableComboBox(LineEdit, ComboBoxBase):
 
         self.dropButton.clicked.connect(self._toggleComboMenu)
         self.textEdited.connect(self._onTextEdited)
-        self.returnPressed.connect(lambda: self.addItem(self.text()))
+        self.returnPressed.connect(self._onReturnPressed)
 
-    def _onTextEdited(self, text: str):
-        if text not in self.itemMap:
-            self._currentIndex = -1
-        else:
-            self._currentIndex = self.items.index(self.itemMap[text])
+    def _onReturnPressed(self):
+        if not self.text():
+            return
+
+        index = self.findText(self.text())
+        if index >= 0 and index != self.currentIndex():
+            self._currentIndex = index
+            self.currentIndexChanged.emit(index)
+        elif index == -1:
+            self.addItem(self.text())
+            self.setCurrentIndex(self.count() - 1)
 
+    def _onTextEdited(self, text: str):
+        self._currentIndex = -1
         self.currentTextChanged.emit(text)
 
+        for i, item in enumerate(self.items):
+            if item.text == text:
+                self._currentIndex = i
+                self.currentIndexChanged.emit(i)
+                return
+
     def _onDropMenuClosed(self):
         self.dropMenu = None