Sizing problems in 6.5.0

[Perdrix]

I have a Group Box

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <widget name="__qt_fake_top_level">
  <widget class="QGroupBox" name="registerAndStack">
   <property name="geometry">
    <rect>
     <x>9</x>
     <y>9</y>
     <width>245</width>
     <height>385</height>
    </rect>
   </property>
   <property name="sizePolicy">
    <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
     <horstretch>0</horstretch>
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
   <property name="styleSheet">
    <string notr="true">background-color: lightcyan</string>
   </property>
   <property name="title">
    <string comment="IDC_STACKING_TITLE">Registering and Stacking</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout_8" stretch="7,3,4">
    <property name="spacing">
     <number>5</number>
    </property>
    <property name="leftMargin">
     <number>5</number>
    </property>
    <property name="topMargin">
     <number>5</number>
    </property>
    <property name="rightMargin">
     <number>5</number>
    </property>
    <property name="bottomMargin">
     <number>5</number>
    </property>
    <item>
     <widget class="QFrame" name="frame_1">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="frameShape">
       <enum>QFrame::StyledPanel</enum>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout_9">
       <property name="spacing">
        <number>4</number>
       </property>
       <property name="leftMargin">
        <number>5</number>
       </property>
       <property name="topMargin">
        <number>5</number>
       </property>
       <property name="rightMargin">
        <number>5</number>
       </property>
       <property name="bottomMargin">
        <number>5</number>
       </property>
       <item>
        <widget class="QLabel" name="openLights">
         <property name="styleSheet">
          <string notr="true"/>
         </property>
         <property name="text">
          <string comment="IDC_STACKING_OPENFILES">Open picture files...</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QLabel" name="openDarks">
         <property name="styleSheet">
          <string notr="true">margin-left: 30</string>
         </property>
         <property name="text">
          <string comment="IDC_STACKING_OPENDARKS">dark files...</string>
         </property>
         <property name="margin">
          <number>0</number>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QLabel" name="openFlats">
         <property name="styleSheet">
          <string notr="true">margin-left: 30</string>
         </property>
         <property name="text">
          <string comment="IDC_STACKING_OPENFLATS">flat files...</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QLabel" name="openDarkFlats">
         <property name="styleSheet">
          <string notr="true">margin-left: 30</string>
         </property>
         <property name="text">
          <string comment="IDC_STACKING_OPENDARKFLATS">dark flat files...</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QLabel" name="openBias">
         <property name="styleSheet">
          <string notr="true">margin-left: 30</string>
         </property>
         <property name="text">
          <string comment="IDC_STACKING_OPENOFFSETS">offset/bias files...</string>
         </property>
        </widget>
       </item>
       <item>
        <spacer name="verticalSpacer_3">
         <property name="orientation">
          <enum>Qt::Vertical</enum>
         </property>
         <property name="sizeType">
          <enum>QSizePolicy::Fixed</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>20</width>
           <height>5</height>
          </size>
         </property>
        </spacer>
       </item>
       <item>
        <widget class="QLabel" name="openFilelist">
         <property name="text">
          <string comment="IDC_STACKING_LOADLIST">Open a File List...</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QLabel" name="saveFilelist">
         <property name="text">
          <string comment="IDC_STACKING_SAVELIST">Save the File List...</string>
         </property>
        </widget>
       </item>
       <item>
        <spacer name="verticalSpacer_4">
         <property name="orientation">
          <enum>Qt::Vertical</enum>
         </property>
         <property name="sizeType">
          <enum>QSizePolicy::Fixed</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>20</width>
           <height>10</height>
          </size>
         </property>
        </spacer>
       </item>
       <item>
        <widget class="QLabel" name="clearList">
         <property name="text">
          <string comment="IDC_STACKING_CLEARLIST">Clear List</string>
         </property>
        </widget>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <widget class="QFrame" name="frame_2">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="frameShape">
       <enum>QFrame::StyledPanel</enum>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout_10">
       <property name="spacing">
        <number>4</number>
       </property>
       <property name="leftMargin">
        <number>5</number>
       </property>
       <property name="topMargin">
        <number>5</number>
       </property>
       <property name="rightMargin">
        <number>5</number>
       </property>
       <property name="bottomMargin">
        <number>5</number>
       </property>
       <item>
        <widget class="QLabel" name="checkAll">
         <property name="text">
          <string comment="IDC_STACKING_CHECKALL">Check all</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QLabel" name="checkAbove">
         <property name="text">
          <string comment="IDC_STACKING_CHECKABOVE">Check above a threshold...</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QLabel" name="unCheckAll">
         <property name="text">
          <string comment="IDC_STACKING_UNCHECKALL">Uncheck all</string>
         </property>
        </widget>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <widget class="QFrame" name="frame_3">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="frameShape">
       <enum>QFrame::StyledPanel</enum>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout_11">
       <property name="spacing">
        <number>4</number>
       </property>
       <property name="leftMargin">
        <number>5</number>
       </property>
       <property name="topMargin">
        <number>5</number>
       </property>
       <property name="rightMargin">
        <number>5</number>
       </property>
       <property name="bottomMargin">
        <number>5</number>
       </property>
       <item>
        <widget class="QLabel" name="registerChecked">
         <property name="text">
          <string comment="IDC_REGISTERING_REGISTERCHECKED">Register checked pictures...</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QLabel" name="computeOffsets">
         <property name="text">
          <string comment="IDC_STACKING_COMPUTEOFFSETS">Compute offsets...</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QLabel" name="stackChecked">
         <property name="text">
          <string comment="IDC_STACKING_STACKCHECKED">Stack checked pictures...</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QLabel" name="batchStacking">
         <property name="text">
          <string comment="IDC_STACKING_BATCHSTACK">Batch stacking...</string>
         </property>
        </widget>
       </item>
      </layout>
     </widget>
    </item>
   </layout>
  </widget>
 </widget>
 <resources/>
</ui>

All the frames and the group box itself are defined with a verticalSizePolicy of Fixed.

But when I build and run under 6.5.0 and decrease the window size this happens (and I don't believe it should):

For reference this is what I see in 6.4.0 (which I believe to be correct):

[Perdrix]

I've reported this as a bug:

https://bugreports.qt.io/browse/QTBUG-112654

and closed it as Invalid! A minimum size was set slightly low ...

[Christian Ehrlicher]

Your toplevel widget has no layout.

[Perdrix]

@Christian-Ehrlicher The group box isn't the top level widget. Here's the whole thing

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>ExplorerBar</class>
 <widget class="QDockWidget" name="ExplorerBar">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>275</width>
    <height>763</height>
   </rect>
  </property>
  <property name="sizePolicy">
   <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
    <horstretch>0</horstretch>
    <verstretch>0</verstretch>
   </sizepolicy>
  </property>
  <property name="minimumSize">
   <size>
    <width>260</width>
    <height>454</height>
   </size>
  </property>
  <property name="maximumSize">
   <size>
    <width>275</width>
    <height>524287</height>
   </size>
  </property>
  <property name="styleSheet">
   <string/>
  </property>
  <property name="features">
   <set>QDockWidget::DockWidgetFloatable|QDockWidget::DockWidgetMovable</set>
  </property>
  <property name="allowedAreas">
   <set>Qt::LeftDockWidgetArea</set>
  </property>
  <property name="windowTitle">
   <string notr="true">DeepSkyStacker</string>
  </property>
  <widget class="QWidget" name="dockWidgetContents">
   <property name="sizePolicy">
    <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
     <horstretch>0</horstretch>
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
   <property name="minimumSize">
    <size>
     <width>260</width>
     <height>430</height>
    </size>
   </property>
   <property name="maximumSize">
    <size>
     <width>350</width>
     <height>16777215</height>
    </size>
   </property>
   <property name="windowTitle">
    <string/>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout" stretch="0">
    <property name="spacing">
     <number>24</number>
    </property>
    <property name="leftMargin">
     <number>5</number>
    </property>
    <property name="topMargin">
     <number>5</number>
    </property>
    <property name="rightMargin">
     <number>5</number>
    </property>
    <property name="bottomMargin">
     <number>5</number>
    </property>
    <item>
     <widget class="QScrollArea" name="scrollArea">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="widgetResizable">
       <bool>true</bool>
      </property>
      <widget class="QWidget" name="scrollAreaWidgetContents">
       <property name="geometry">
        <rect>
         <x>0</x>
         <y>0</y>
         <width>263</width>
         <height>727</height>
        </rect>
       </property>
       <property name="minimumSize">
        <size>
         <width>230</width>
         <height>700</height>
        </size>
       </property>
       <layout class="QVBoxLayout" name="verticalLayout_2">
        <item>
         <widget class="QGroupBox" name="registerAndStack">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="styleSheet">
           <string notr="true">background-color: lightcyan</string>
          </property>
          <property name="title">
           <string comment="IDC_STACKING_TITLE">Registering and Stacking</string>
          </property>
          <layout class="QVBoxLayout" name="verticalLayout_8" stretch="7,3,4">
           <property name="spacing">
            <number>5</number>
           </property>
           <property name="leftMargin">
            <number>5</number>
           </property>
           <property name="topMargin">
            <number>5</number>
           </property>
           <property name="rightMargin">
            <number>5</number>
           </property>
           <property name="bottomMargin">
            <number>5</number>
           </property>
           <item>
            <widget class="QFrame" name="frame_1">
             <property name="sizePolicy">
              <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
              </sizepolicy>
             </property>
             <property name="frameShape">
              <enum>QFrame::StyledPanel</enum>
             </property>
             <layout class="QVBoxLayout" name="verticalLayout_9">
              <property name="spacing">
               <number>4</number>
              </property>
              <property name="leftMargin">
               <number>5</number>
              </property>
              <property name="topMargin">
               <number>5</number>
              </property>
              <property name="rightMargin">
               <number>5</number>
              </property>
              <property name="bottomMargin">
               <number>5</number>
              </property>
              <item>
               <widget class="QLabel" name="openLights">
                <property name="styleSheet">
                 <string notr="true"/>
                </property>
                <property name="text">
                 <string comment="IDC_STACKING_OPENFILES">Open picture files...</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QLabel" name="openDarks">
                <property name="styleSheet">
                 <string notr="true">margin-left: 30</string>
                </property>
                <property name="text">
                 <string comment="IDC_STACKING_OPENDARKS">dark files...</string>
                </property>
                <property name="margin">
                 <number>0</number>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QLabel" name="openFlats">
                <property name="styleSheet">
                 <string notr="true">margin-left: 30</string>
                </property>
                <property name="text">
                 <string comment="IDC_STACKING_OPENFLATS">flat files...</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QLabel" name="openDarkFlats">
                <property name="styleSheet">
                 <string notr="true">margin-left: 30</string>
                </property>
                <property name="text">
                 <string comment="IDC_STACKING_OPENDARKFLATS">dark flat files...</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QLabel" name="openBias">
                <property name="styleSheet">
                 <string notr="true">margin-left: 30</string>
                </property>
                <property name="text">
                 <string comment="IDC_STACKING_OPENOFFSETS">offset/bias files...</string>
                </property>
               </widget>
              </item>
              <item>
               <spacer name="verticalSpacer_3">
                <property name="orientation">
                 <enum>Qt::Vertical</enum>
                </property>
                <property name="sizeType">
                 <enum>QSizePolicy::Fixed</enum>
                </property>
                <property name="sizeHint" stdset="0">
                 <size>
                  <width>20</width>
                  <height>5</height>
                 </size>
                </property>
               </spacer>
              </item>
              <item>
               <widget class="QLabel" name="openFilelist">
                <property name="text">
                 <string comment="IDC_STACKING_LOADLIST">Open a File List...</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QLabel" name="saveFilelist">
                <property name="text">
                 <string comment="IDC_STACKING_SAVELIST">Save the File List...</string>
                </property>
               </widget>
              </item>
              <item>
               <spacer name="verticalSpacer_4">
                <property name="orientation">
                 <enum>Qt::Vertical</enum>
                </property>
                <property name="sizeType">
                 <enum>QSizePolicy::Fixed</enum>
                </property>
                <property name="sizeHint" stdset="0">
                 <size>
                  <width>20</width>
                  <height>10</height>
                 </size>
                </property>
               </spacer>
              </item>
              <item>
               <widget class="QLabel" name="clearList">
                <property name="text">
                 <string comment="IDC_STACKING_CLEARLIST">Clear List</string>
                </property>
               </widget>
              </item>
             </layout>
            </widget>
           </item>
           <item>
            <widget class="QFrame" name="frame_2">
             <property name="sizePolicy">
              <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
              </sizepolicy>
             </property>
             <property name="frameShape">
              <enum>QFrame::StyledPanel</enum>
             </property>
             <layout class="QVBoxLayout" name="verticalLayout_10">
              <property name="spacing">
               <number>4</number>
              </property>
              <property name="leftMargin">
               <number>5</number>
              </property>
              <property name="topMargin">
               <number>5</number>
              </property>
              <property name="rightMargin">
               <number>5</number>
              </property>
              <property name="bottomMargin">
               <number>5</number>
              </property>
              <item>
               <widget class="QLabel" name="checkAll">
                <property name="text">
                 <string comment="IDC_STACKING_CHECKALL">Check all</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QLabel" name="checkAbove">
                <property name="text">
                 <string comment="IDC_STACKING_CHECKABOVE">Check above a threshold...</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QLabel" name="unCheckAll">
                <property name="text">
                 <string comment="IDC_STACKING_UNCHECKALL">Uncheck all</string>
                </property>
               </widget>
              </item>
             </layout>
            </widget>
           </item>
           <item>
            <widget class="QFrame" name="frame_3">
             <property name="sizePolicy">
              <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
              </sizepolicy>
             </property>
             <property name="frameShape">
              <enum>QFrame::StyledPanel</enum>
             </property>
             <layout class="QVBoxLayout" name="verticalLayout_11">
              <property name="spacing">
               <number>4</number>
              </property>
              <property name="leftMargin">
               <number>5</number>
              </property>
              <property name="topMargin">
               <number>5</number>
              </property>
              <property name="rightMargin">
               <number>5</number>
              </property>
              <property name="bottomMargin">
               <number>5</number>
              </property>
              <item>
               <widget class="QLabel" name="registerChecked">
                <property name="text">
                 <string comment="IDC_REGISTERING_REGISTERCHECKED">Register checked pictures...</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QLabel" name="computeOffsets">
                <property name="text">
                 <string comment="IDC_STACKING_COMPUTEOFFSETS">Compute offsets...</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QLabel" name="stackChecked">
                <property name="text">
                 <string comment="IDC_STACKING_STACKCHECKED">Stack checked pictures...</string>
                </property>
               </widget>
              </item>
              <item>
               <widget class="QLabel" name="batchStacking">
                <property name="text">
                 <string comment="IDC_STACKING_BATCHSTACK">Batch stacking...</string>
                </property>
               </widget>
              </item>
             </layout>
            </widget>
           </item>
          </layout>
         </widget>
        </item>
        <item>
         <widget class="QGroupBox" name="processing">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="styleSheet">
           <string notr="true">background-color: rgb(240, 240, 240)</string>
          </property>
          <property name="title">
           <string comment="IDC_PROCESSING_TITLE">Processing</string>
          </property>
          <layout class="QVBoxLayout" name="verticalLayout_5">
           <property name="spacing">
            <number>4</number>
           </property>
           <property name="leftMargin">
            <number>11</number>
           </property>
           <property name="topMargin">
            <number>6</number>
           </property>
           <property name="rightMargin">
            <number>11</number>
           </property>
           <property name="bottomMargin">
            <number>6</number>
           </property>
           <item>
            <widget class="QLabel" name="openPicture">
             <property name="text">
              <string comment="IDC_PROCESSING_OPENFILE">Open picture file...</string>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QLabel" name="copyPicture">
             <property name="text">
              <string comment="IDC_PROCESSING_COPYTOCLIPBOARD">Copy current picture to clipboard</string>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QLabel" name="doStarMask">
             <property name="text">
              <string comment="IDC_PROCESSING_CREATESTARMASK">Create a Star Mask...</string>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QLabel" name="savePicture">
             <property name="text">
              <string comment="IDC_PROCESSING_SAVEFILE">Save picture to file...</string>
             </property>
            </widget>
           </item>
          </layout>
         </widget>
        </item>
        <item>
         <widget class="QGroupBox" name="options">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="styleSheet">
           <string notr="true">background-color: lightcyan</string>
          </property>
          <property name="title">
           <string comment="IDC_OPTIONS_TITLE">Options</string>
          </property>
          <layout class="QVBoxLayout" name="verticalLayout_4">
           <property name="spacing">
            <number>4</number>
           </property>
           <property name="leftMargin">
            <number>11</number>
           </property>
           <property name="topMargin">
            <number>6</number>
           </property>
           <property name="rightMargin">
            <number>11</number>
           </property>
           <property name="bottomMargin">
            <number>6</number>
           </property>
           <item>
            <widget class="QLabel" name="settings">
             <property name="text">
              <string comment="IDC_OPTIONS_SETTINGS">Settings...</string>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QLabel" name="ddpSettings">
             <property name="styleSheet">
              <string notr="true">margin-left: 30</string>
             </property>
             <property name="text">
              <string comment="IDC_OPTIONS_RAWDDPSETTINGS">Raw/FITS DDP Settings...</string>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QLabel" name="loadSettings">
             <property name="styleSheet">
              <string notr="true">margin-left: 30</string>
             </property>
             <property name="text">
              <string comment="IDC_OPTIONS_LOADSETTINGS">Load...</string>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QLabel" name="saveSettings">
             <property name="styleSheet">
              <string notr="true">margin-left: 30</string>
             </property>
             <property name="text">
              <string comment="IDC_OPTIONS_SAVESETTINGS">Save...</string>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QLabel" name="recommendedSettings">
             <property name="styleSheet">
              <string notr="true">margin-left: 30</string>
             </property>
             <property name="text">
              <string comment="IDC_OPTIONS_RECOMMANDEDSETTINGS">Recommended...</string>
             </property>
            </widget>
           </item>
           <item>
            <spacer name="verticalSpacer_2">
             <property name="orientation">
              <enum>Qt::Vertical</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>20</width>
               <height>10</height>
              </size>
             </property>
            </spacer>
           </item>
           <item>
            <widget class="QLabel" name="about">
             <property name="text">
              <string comment="IDC_ABOUT">About DeepSkyStacker...</string>
             </property>
            </widget>
           </item>
           <item>
            <spacer name="verticalSpacer_5">
             <property name="orientation">
              <enum>Qt::Vertical</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>20</width>
               <height>5</height>
              </size>
             </property>
            </spacer>
           </item>
           <item>
            <widget class="QLabel" name="help">
             <property name="text">
              <string comment="IDC_CONTEXTHELP">DeepSkyStacker's Help...</string>
             </property>
            </widget>
           </item>
           <item>
            <spacer name="verticalSpacer_6">
             <property name="orientation">
              <enum>Qt::Vertical</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>20</width>
               <height>5</height>
              </size>
             </property>
            </spacer>
           </item>
           <item>
            <widget class="QLabel" name="traceFileDisposition">
             <property name="text">
              <string/>
             </property>
            </widget>
           </item>
          </layout>
         </widget>
        </item>
        <item>
         <spacer name="verticalSpacer">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
          <property name="sizeHint" stdset="0">
           <size>
            <width>20</width>
            <height>40</height>
           </size>
          </property>
         </spacer>
        </item>
       </layout>
      </widget>
     </widget>
    </item>
   </layout>
  </widget>
 </widget>
 <resources/>
 <connections>
  <connection>
   <sender>openLights</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onOpenLights()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>46</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>openDarks</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onOpenDarks()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>63</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>openFlats</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onOpenFlats()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>80</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>openDarkFlats</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onOpenDarkFlats()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>97</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>openBias</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onOpenBias()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>114</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>openFilelist</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onOpenFilelist()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>140</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>saveFilelist</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onSaveFilelist()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>157</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>clearList</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onClearList()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>188</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>checkAll</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onCheckAll()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>218</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>checkAbove</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onCheckAbove()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>235</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>unCheckAll</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onUncheckAll()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>252</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>registerChecked</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onRegisterChecked()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>282</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>computeOffsets</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onComputeOffsets()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>299</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>stackChecked</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onStackChecked()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>316</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>batchStacking</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onBatchStacking()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>333</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>openPicture</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onOpenPicture()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>384</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>copyPicture</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onCopyPicture()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>401</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>doStarMask</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onDoStarMask()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>418</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>savePicture</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onSavePicture()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>435</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>settings</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onSettings()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>481</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>ddpSettings</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onDDPSettings()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>498</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>loadSettings</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onLoadSettings()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>515</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>saveSettings</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onSaveSettings()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>532</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>recommendedSettings</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onRecommendedSettings()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>549</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>about</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onAbout()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>566</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>help</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onHelp()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>122</x>
     <y>583</y>
    </hint>
    <hint type="destinationlabel">
     <x>122</x>
     <y>320</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>traceFileDisposition</sender>
   <signal>linkActivated(QString)</signal>
   <receiver>ExplorerBar</receiver>
   <slot>onToggleDeletion()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>137</x>
     <y>726</y>
    </hint>
    <hint type="destinationlabel">
     <x>137</x>
     <y>381</y>
    </hint>
   </hints>
  </connection>
 </connections>
 <slots>
  <slot>linkActivated()</slot>
  <slot>onAbout()</slot>
  <slot>onSettings()</slot>
  <slot>onDDPSettings()</slot>
  <slot>onLoadSettings()</slot>
  <slot>onSaveSettings()</slot>
  <slot>onHelp()</slot>
  <slot>onRecommendedSettings()</slot>
  <slot>onOpenPicture()</slot>
  <slot>onCopyPicture()</slot>
  <slot>onDoStarMask()</slot>
  <slot>onSavePicture()</slot>
  <slot>onStackChecked()</slot>
  <slot>onBatchStacking()</slot>
  <slot>onComputeOffsets()</slot>
  <slot>onRegisterChecked()</slot>
  <slot>onUncheckAll()</slot>
  <slot>onCheckAbove()</slot>
  <slot>onCheckAll()</slot>
  <slot>onClearList()</slot>
  <slot>onSaveFilelist()</slot>
  <slot>onOpenFilelist()</slot>
  <slot>onOpenLights()</slot>
  <slot>onOpenDarks()</slot>
  <slot>onOpenFlats()</slot>
  <slot>onOpenBias()</slot>
  <slot>onOpenDarkFlats()</slot>
  <slot>onToggleDeletion()</slot>
 </slots>
</ui>

[Christian Ehrlicher]

The ui file you posted can't be read by my designer. I would go without a style sheet first to see if this is the culprit.

[Perdrix]

@Christian-Ehrlicher

http://www.perdrix.co.uk/ExplorerBar.ui

[Perdrix]

@Christian-Ehrlicher I've updated the ui file to remove all stylesheet stuff. I've also commented out all the stylesheet manipulation in the code.

I've re-uploaded the ui file to my website.

Still have the same issue:

By contrast in 6.4.0 I get:

[Perdrix]

I've reported this as a bug:

https://bugreports.qt.io/browse/QTBUG-112654

and closed it as Invalid! A minimum size was set slightly low ...