Fix #9012 (Tweak Window Left Pane Resizing)

src/calibre/gui2/preferences/tweaks.py

@@ -260,6 +260,9 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         self.restore_default_button.clicked.connect(self.restore_to_default)
         self.apply_button.clicked.connect(self.apply_tweak)
         self.plugin_tweaks_button.clicked.connect(self.plugin_tweaks)
+        self.splitter.setStretchFactor(0, 1)
+        self.splitter.setStretchFactor(1, 100)
+
 
     def plugin_tweaks(self):
         raw = self.tweaks.plugin_tweaks_string

src/calibre/gui2/preferences/tweaks.ui

@@ -13,8 +13,16 @@
   <property name="windowTitle">
    <string>Form</string>
   </property>
-  <layout class="QGridLayout" name="gridLayout_2">
-   <item row="0" column="0" rowspan="2">
+  <layout class="QVBoxLayout" name="verticalLayout_4">
+   <item>
+    <widget class="QSplitter" name="splitter">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="childrenCollapsible">
+      <bool>false</bool>
+     </property>
+     <widget class="QWidget" name="layoutWidget">
       <layout class="QVBoxLayout" name="verticalLayout_2">
        <item>
         <widget class="QLabel" name="label_18">
@@ -62,8 +70,10 @@
         </widget>
        </item>
       </layout>
-   </item>
-   <item row="0" column="1">
+     </widget>
+     <widget class="QWidget" name="layoutWidget">
+      <layout class="QVBoxLayout" name="verticalLayout_3">
+       <item>
         <widget class="QGroupBox" name="groupBox">
          <property name="title">
           <string>Help</string>
@@ -82,7 +92,7 @@
          </layout>
         </widget>
        </item>
-   <item row="1" column="1">
+       <item>
         <widget class="QGroupBox" name="groupBox_2">
          <property name="title">
           <string>Edit tweak</string>
@@ -120,6 +130,10 @@
        </item>
       </layout>
      </widget>
+    </widget>
+   </item>
+  </layout>
+ </widget>
  <resources/>
  <connections/>
 </ui>