<![CDATA[Ui, finding control by using literal string]]>I have a number of controls on a form, these have been named with an index after each name, e.g. lblT0, lblT1, lblT2 etc.

The idea is that a bunch of controls do the same thing and have been copied into layouts, the form is resized to show the number of layouts applicable. I need to be able to search for controls using the index of the control to update, how can I do this? I've looked for methods to search for controls, I couldn't see anything.

Something like:

  • Look for iterator for QString("lblT%1").arg(index)
  • If iterator finds control, update control.
]]>https://forum.qt.io/topic/131333/ui-finding-control-by-using-literal-stringRSS for NodeSat, 11 Jul 2026 17:56:25 GMTFri, 22 Oct 2021 09:21:02 GMT60<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 11:48:48 GMT]]>@SPlatten as stated beforehand

Layout cannot be parent of a widget...

use <widget class="QWidget" name="verticalLayoutWidget">instead.

]]>https://forum.qt.io/post/686241https://forum.qt.io/post/686241Fri, 22 Oct 2021 11:48:48 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 12:25:31 GMT]]>@SPlatten because findChild is a function of QObject

However QWidgets based classes requiere a QWidget and not a QObject as a parent. Layouts are no QWidgets

]]>https://forum.qt.io/post/686246https://forum.qt.io/post/686246Fri, 22 Oct 2021 12:25:31 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 11:51:46 GMT]]>@J-Hilk , thank you, trying that now, why when you dereference the layout does it come up with the findChild suggestion as well as others, it compiles with no errors or warnings?

]]>https://forum.qt.io/post/686242https://forum.qt.io/post/686242Fri, 22 Oct 2021 11:51:46 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 11:48:48 GMT]]>@SPlatten as stated beforehand

Layout cannot be parent of a widget...

use <widget class="QWidget" name="verticalLayoutWidget">instead.

]]>https://forum.qt.io/post/686241https://forum.qt.io/post/686241Fri, 22 Oct 2021 11:48:48 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 11:41:00 GMT]]>@jsulm , on my form I have a layout QVBoxLayout it has the name pvtloTrainees, this layout has lots of children, here is the UI:

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>SendRDF</class>
<widget class="QMainWindow" name="SendRDF">
  <property name="windowModality">
   <enum>Qt::ApplicationModal</enum>
  </property>
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>620</width>
    <height>681</height>
   </rect>
  </property>
  <property name="minimumSize">
   <size>
    <width>492</width>
    <height>108</height>
   </size>
  </property>
  <property name="styleSheet">
   <string notr="true">QMainWindow{border:2px solid black;}</string>
  </property>
  <widget class="QWidget" name="centralWidget">
   <property name="sizePolicy">
    <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
     <horstretch>0</horstretch>
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0">
     <widget class="QLabel" name="label">
      <property name="text">
       <string>RDF file:</string>
      </property>
      <property name="alignment">
       <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
      </property>
     </widget>
   </item>
    <item row="0" column="1" colspan="3">
     <widget class="QLabel" name="plblFilename">
      <property name="text">
       <string>Device, path and filename</string>
      </property>
     </widget>
    </item>
    <item row="1" column="0">
     <widget class="QLabel" name="label_2">
      <property name="text">
       <string>File size:</string>
      </property>
      <property name="alignment">
       <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
      </property>
     </widget>
    </item>
    <item row="1" column="1">
     <widget class="QLabel" name="plblFilesize">
      <property name="contextMenuPolicy">
       <enum>Qt::NoContextMenu</enum>
      </property>
      <property name="text">
       <string>##########</string>
      </property>
      <property name="alignment">
       <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
      </property>
     </widget>
    </item>
    <item row="1" column="2" colspan="3">
     <spacer name="horizontalSpacer">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="1" column="5">
     <widget class="QLabel" name="label_5">
      <property name="text">
       <string>Elapsed:</string>
      </property>
     </widget>
    </item>
    <item row="1" column="6">
     <widget class="QLabel" name="plblElapsed">
      <property name="text">
       <string>##:##:##.###</string>
      </property>
     </widget>
    </item>
    <item row="2" column="0" colspan="7">
     <widget class="QGroupBox" name="pgrpTrainees">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
        <horstretch>1</horstretch>
        <verstretch>1</verstretch>
       </sizepolicy>
      </property>
      <property name="title">
       <string/>
      </property>
      <property name="flat">
       <bool>true</bool>
      </property>
      <widget class="QWidget" name="verticalLayoutWidget">
       <property name="geometry">
        <rect>
         <x>0</x>
         <y>0</y>
         <width>600</width>
         <height>585</height>
        </rect>
       </property>
       <layout class="QVBoxLayout" name="pvtloTrainees">
        <item>
         <layout class="QVBoxLayout" name="pvbloT0">
          <item>
           <layout class="QHBoxLayout" name="phzloT0">
            <item>
             <widget class="QLabel" name="plblT0">
              <property name="enabled">
               <bool>true</bool>
              </property>
              <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
              </property>
              <property name="styleSheet">
               <string notr="true"/>
              </property>
              <property name="text">
               <string>Trainee:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTN0">
              <property name="text">
               <string>ABCDEFGHIJKLMNOPQRSTUVWXYZ</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="sprT0">
              <property name="orientation">
               <enum>Qt::Horizontal</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>40</width>
                <height>20</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLabel" name="plblTBlocks0">
              <property name="text">
               <string>Blocks:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTB0">
              <property name="text">
               <string>#######</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
           </layout>
          </item>
          <item>
           <widget class="QLabel" name="plblTE0">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="layoutDirection">
             <enum>Qt::LeftToRight</enum>
            </property>
            <property name="styleSheet">
             <string notr="true">background-color:#ff0000;color:#ffff00;font-weight:bold;</string>
            </property>
            <property name="text">
             <string/>
            </property>
            <property name="textFormat">
             <enum>Qt::AutoText</enum>
            </property>
            <property name="alignment">
             <set>Qt::AlignCenter</set>
            </property>
           </widget>
          </item>
          <item>
           <widget class="QProgressBar" name="ppgbT0">
            <property name="value">
             <number>0</number>
            </property>
           </widget>
          </item>
         </layout>
        </item>
        <item>
         <layout class="QVBoxLayout" name="pvbloT1">
          <item>
           <layout class="QHBoxLayout" name="phzloT1">
            <item>
             <widget class="QLabel" name="plblT1">
              <property name="enabled">
               <bool>true</bool>
              </property>
              <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
              </property>
              <property name="styleSheet">
               <string notr="true"/>
              </property>
              <property name="text">
               <string>Trainee:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTN1">
              <property name="text">
               <string>ABCDEFGHIJKLMNOPQRSTUVWXYZ</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="sprT1">
              <property name="orientation">
               <enum>Qt::Horizontal</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>40</width>
                <height>20</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLabel" name="plblTBlocks1">
              <property name="text">
               <string>Blocks:</string>
             </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTB1">
              <property name="text">
               <string>#######</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
           </layout>
          </item>
          <item>
           <widget class="QLabel" name="plblTE1">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="layoutDirection">
             <enum>Qt::LeftToRight</enum>
            </property>
            <property name="styleSheet">
             <string notr="true">background-color:#ff0000;color:#ffff00;font-weight:bold;</string>
            </property>
            <property name="text">
             <string/>
            </property>
            <property name="textFormat">
             <enum>Qt::AutoText</enum>
            </property>
            <property name="alignment">
             <set>Qt::AlignCenter</set>
            </property>
           </widget>
          </item>
          <item>
           <widget class="QProgressBar" name="ppgbT1">
            <property name="value">
             <number>0</number>
            </property>
           </widget>
          </item>
         </layout>
        </item>
        <item>
        <layout class="QVBoxLayout" name="pvbloT2">
          <item>
           <layout class="QHBoxLayout" name="phzloT2">
            <item>
             <widget class="QLabel" name="plblT2">
              <property name="enabled">
               <bool>true</bool>
              </property>
              <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
              </property>
              <property name="styleSheet">
               <string notr="true"/>
              </property>
              <property name="text">
               <string>Trainee:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTN2">
              <property name="text">
               <string>ABCDEFGHIJKLMNOPQRSTUVWXYZ</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="sprT2">
              <property name="orientation">
               <enum>Qt::Horizontal</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>40</width>
                <height>20</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLabel" name="plblTBlocks2">
              <property name="text">
               <string>Blocks:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTB2">
              <property name="text">
               <string>#######</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
           </layout>
          </item>
          <item>
           <widget class="QLabel" name="plblTE2">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="layoutDirection">
             <enum>Qt::LeftToRight</enum>
            </property>
            <property name="styleSheet">
             <string notr="true">background-color:#ff0000;color:#ffff00;font-weight:bold;</string>
            </property>
            <property name="text">
             <string/>
            </property>
            <property name="textFormat">
             <enum>Qt::AutoText</enum>
            </property>
            <property name="alignment">
             <set>Qt::AlignCenter</set>
            </property>
           </widget>
          </item>
          <item>
           <widget class="QProgressBar" name="ppgbT2">
            <property name="value">
             <number>0</number>
            </property>
           </widget>
          </item>
         </layout>
        </item>
        <item>
         <layout class="QVBoxLayout" name="pvbloT3">
          <item>
           <layout class="QHBoxLayout" name="phzloT3">
            <item>
             <widget class="QLabel" name="plblT3">
              <property name="enabled">
               <bool>true</bool>
              </property>
              <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
              </property>
              <property name="styleSheet">
               <string notr="true"/>
              </property>
              <property name="text">
               <string>Trainee:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTN3">
              <property name="text">
               <string>ABCDEFGHIJKLMNOPQRSTUVWXYZ</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="sprT3">
              <property name="orientation">
               <enum>Qt::Horizontal</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>40</width>
                <height>20</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLabel" name="plblTBlocks3">
              <property name="text">
               <string>Blocks:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTB3">
              <property name="text">
               <string>#######</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
           </layout>
          </item>
          <item>
           <widget class="QProgressBar" name="ppgbT3">
            <property name="value">
             <number>0</number>
            </property>
           </widget>
          </item>
         </layout>
        </item>
        <item>
         <layout class="QVBoxLayout" name="pvbloT4">
          <item>
           <layout class="QHBoxLayout" name="phzloT4">
            <item>
             <widget class="QLabel" name="plblT4">
              <property name="enabled">
               <bool>true</bool>
              </property>
              <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
              </property>
              <property name="styleSheet">
               <string notr="true"/>
              </property>
              <property name="text">
               <string>Trainee:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTN4">
              <property name="text">
               <string>ABCDEFGHIJKLMNOPQRSTUVWXYZ</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="sprT4">
              <property name="orientation">
               <enum>Qt::Horizontal</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>40</width>
                <height>20</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLabel" name="plblTBlocks4">
              <property name="text">
               <string>Blocks:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTB4">
              <property name="text">
               <string>#######</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
           </layout>
          </item>
          <item>
           <widget class="QLabel" name="plblTE4">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="layoutDirection">
             <enum>Qt::LeftToRight</enum>
            </property>
            <property name="styleSheet">
             <string notr="true">background-color:#ff0000;color:#ffff00;font-weight:bold;</string>
            </property>
            <property name="text">
             <string/>
            </property>
            <property name="textFormat">
             <enum>Qt::AutoText</enum>
            </property>
            <property name="alignment">
             <set>Qt::AlignCenter</set>
            </property>
           </widget>
          </item>
          <item>
           <widget class="QProgressBar" name="ppgbT4">
            <property name="value">
             <number>0</number>
            </property>
           </widget>
          </item>
         </layout>
        </item>
        <item>
         <layout class="QVBoxLayout" name="pvbloT5">
          <item>
           <layout class="QHBoxLayout" name="phzloT5">
            <item>
             <widget class="QLabel" name="plblT5">
              <property name="enabled">
               <bool>true</bool>
              </property>
             <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
              </property>
             <property name="styleSheet">
               <string notr="true"/>
              </property>
              <property name="text">
               <string>Trainee:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTN5">
              <property name="text">
               <string>ABCDEFGHIJKLMNOPQRSTUVWXYZ</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="sprT5">
              <property name="orientation">
               <enum>Qt::Horizontal</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>40</width>
                <height>20</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLabel" name="plblTBlocks5">
              <property name="text">
               <string>Blocks:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTB5">
              <property name="text">
               <string>#######</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
           </layout>
          </item>
          <item>
           <widget class="QLabel" name="plblTE5">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="layoutDirection">
             <enum>Qt::LeftToRight</enum>
            </property>
            <property name="styleSheet">
             <string notr="true">background-color:#ff0000;color:#ffff00;font-weight:bold;</string>
            </property>
            <property name="text">
             <string/>
            </property>
            <property name="textFormat">
             <enum>Qt::AutoText</enum>
            </property>
            <property name="alignment">
             <set>Qt::AlignCenter</set>
            </property>
           </widget>
          </item>
          <item>
           <widget class="QProgressBar" name="ppgbT5">
            <property name="value">
             <number>0</number>
            </property>
           </widget>
          </item>
         </layout>
        </item>
        <item>
         <layout class="QVBoxLayout" name="pvbloT6">
          <item>
           <layout class="QHBoxLayout" name="phzloT6">
            <item>
             <widget class="QLabel" name="plblT6">
              <property name="enabled">
               <bool>true</bool>
              </property>
              <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
                <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
              </property>
              <property name="styleSheet">
               <string notr="true"/>
              </property>
              <property name="text">
               <string>Trainee:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTN6">
              <property name="text">
               <string>ABCDEFGHIJKLMNOPQRSTUVWXYZ</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="sprT6">
              <property name="orientation">
               <enum>Qt::Horizontal</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>40</width>
                <height>20</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLabel" name="plblTBlocks6">
              <property name="text">
               <string>Blocks:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTB6">
              <property name="text">
               <string>#######</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
           </layout>
          </item>
          <item>
           <widget class="QLabel" name="plblTE6">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="layoutDirection">
             <enum>Qt::LeftToRight</enum>
            </property>
            <property name="styleSheet">
             <string notr="true">background-color:#ff0000;color:#ffff00;font-weight:bold;</string>
            </property>
            <property name="text">
             <string/>
            </property>
            <property name="textFormat">
             <enum>Qt::AutoText</enum>
            </property>
            <property name="alignment">
             <set>Qt::AlignCenter</set>
            </property>
           </widget>
          </item>
          <item>
           <widget class="QProgressBar" name="ppgbT6">
            <property name="value">
             <number>0</number>
            </property>
           </widget>
          </item>
         </layout>
        </item>
        <item>
         <layout class="QVBoxLayout" name="pvbloT7">
          <item>
           <layout class="QHBoxLayout" name="phzloT7">
            <item>
             <widget class="QLabel" name="plblT7">
              <property name="enabled">
               <bool>true</bool>
              </property>
              <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
               <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
              </property>
              <property name="styleSheet">
               <string notr="true"/>
              </property>
              <property name="text">
               <string>Trainee:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTN7">
              <property name="text">
               <string>ABCDEFGHIJKLMNOPQRSTUVWXYZ</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="sprT7">
              <property name="orientation">
               <enum>Qt::Horizontal</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>40</width>
                <height>20</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLabel" name="plblTBlocks7">
              <property name="text">
               <string>Blocks:</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
            <item>
             <widget class="QLabel" name="plblTB7">
              <property name="text">
               <string>#######</string>
              </property>
              <property name="alignment">
               <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
              </property>
             </widget>
            </item>
           </layout>
          </item>
          <item>
           <widget class="QLabel" name="plblTE7">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="layoutDirection">
            <enum>Qt::LeftToRight</enum>
            </property>
            <property name="styleSheet">
             <string notr="true">background-color:#ff0000;color:#ffff00;font-weight:bold;</string>
            </property>
            <property name="text">
             <string/>
            </property>
            <property name="textFormat">
             <enum>Qt::AutoText</enum>
            </property>
            <property name="alignment">
             <set>Qt::AlignCenter</set>
            </property>
           </widget>
          </item>
          <item>
           <widget class="QProgressBar" name="ppgbT7">
            <property name="value">
             <number>0</number>
            </property>
           </widget>
          </item>
         </layout>
        </item>
       </layout>
      </widget>
     </widget>
    </item>
    <item row="4" column="6">
     <widget class="QPushButton" name="pbtnAbort">
      <property name="minimumSize">
       <size>
        <width>80</width>
        <height>24</height>
       </size>
      </property>
      <property name="text">
       <string>&amp;Abort</string>
      </property>
     </widget>
    </item>
   </layout>
  </widget>
</widget>
<resources/>
<connections/>
</ui>

I am trying to locate a widget that is a child of this layout with:

QWidget* pobjFound(mpui->pvtloTrainees->findChild<QWidget*>(cstrCtrlKey));

Where cstrCtrlKey is a string containing something like ppgbT0, but pobjFound is returned as 0x0 ?

]]>https://forum.qt.io/post/686239https://forum.qt.io/post/686239Fri, 22 Oct 2021 11:41:00 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 09:44:55 GMT]]>@SPlatten Layout cannot be parent of a widget...
Simply use the widget containing this layout and the child widgets...

]]>https://forum.qt.io/post/686220https://forum.qt.io/post/686220Fri, 22 Oct 2021 09:44:55 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 09:44:53 GMT]]>@jsulm , I have a layout that contains all the controls, can I use that to speed up the search?

@J-Hilk , @jsulm , thank you, have added:

ui->pvtloTrainees->findChild("...");
]]>https://forum.qt.io/post/686219https://forum.qt.io/post/686219Fri, 22 Oct 2021 09:44:53 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 09:42:03 GMT]]>@SPlatten You pass the pointer to the parent widget which contains the widgets you want to search...

]]>https://forum.qt.io/post/686218https://forum.qt.io/post/686218Fri, 22 Oct 2021 09:42:03 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 09:41:37 GMT]]>just an annotation, if you call findChildren on your root element of your Ui it will be a very slow function call, as it recursively goes through all the children!

Either accept that, narrow the search down, by wisely selection the QObject to search on or, what I prefer, store the objects in a member list/vector/array

]]>https://forum.qt.io/post/686217https://forum.qt.io/post/686217Fri, 22 Oct 2021 09:41:37 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 09:40:07 GMT]]>@jsulm , thank you, if I have the ui pointer how do I use this with findChildren ?

]]>https://forum.qt.io/post/686216https://forum.qt.io/post/686216Fri, 22 Oct 2021 09:40:07 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 09:38:17 GMT]]>@SPlatten Isn't https://doc.qt.io/qt-5/qobject.html#findChildren what you need?

]]>https://forum.qt.io/post/686215https://forum.qt.io/post/686215Fri, 22 Oct 2021 09:38:17 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 09:37:21 GMT]]>@jsulm , I want to address by objectName, so for example, something like:

QProgressBar* pBar(ui->find("name"));
pBar->setValue(123);
]]>https://forum.qt.io/post/686214https://forum.qt.io/post/686214Fri, 22 Oct 2021 09:37:21 GMT<![CDATA[Reply to Ui, finding control by using literal string on Fri, 22 Oct 2021 09:35:47 GMT]]>@SPlatten said in Ui, finding control by using literal string:

these have been named with an index after each name, e.g. lblT0, lblT1, lblT2 etc.

Do you mean variable names or objectName?
https://doc.qt.io/qt-5/qobject.html#findChildren

]]>https://forum.qt.io/post/686213https://forum.qt.io/post/686213Fri, 22 Oct 2021 09:35:47 GMT