QDockWidget problem with focus when undocked

[gde23]

Hi,

I have a QDockWidget with some other QWidgets inside (QTreeView with Delegates)

Now when I undock it and than try to edit a entry of the QTreeView by clicking a cell, the cursor appears in the cell, however than the focus of the window jumps to the MainWindow (Title bar gets highlighted as if it is in the front) and i cannot edit the entry.

This only happens sometimes (docking and undocking allows turning the problem on and off) and I have no clue on how to debug it.

Any ideas what the reason could be??

Qt Version is 5.11 on Debian Strech

EDIT: I just found out that the focus also jumps back to the MainWindow when I do not try to edit anything, but just click the titlebar or anywhere else on the QDockWidget.

[SGaist]

HI,

How did you install Qt ?
Do you have the same behaviour with the distribution provided Qt ?

[gde23]

I've installed it over the Qt-Installer / Maintenance Tool.
When I use the Qt version shipped with the distribution (5.7.1) i get the same behavior.

EDIT: I have set up a new Project just with the Qt-Designer

• New Qt Widget Application
• Add a Dock Widgets (with Designer or by code)
• Run
  -> Same problem there

This the mainwindwo.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDockWidget>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QDockWidget *dock = new QDockWidget(tr("Test"), this);
    dock->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
    QWidget *wi = new QWidget(this);
    dock->setWidget(wi);
    addDockWidget(Qt::RightDockWidgetArea, dock);

}

MainWindow::~MainWindow()
{
    delete ui;
}

Or this is the second thing i tried with the Designer. Same problem
This is the Qt-Designer ui file

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralWidget"/>
  <widget class="QMenuBar" name="menuBar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>400</width>
     <height>19</height>
    </rect>
   </property>
  </widget>
  <widget class="QToolBar" name="mainToolBar">
   <attribute name="toolBarArea">
    <enum>TopToolBarArea</enum>
   </attribute>
   <attribute name="toolBarBreak">
    <bool>false</bool>
   </attribute>
  </widget>
  <widget class="QStatusBar" name="statusBar"/>
  <widget class="QDockWidget" name="dockWidget_3">
   <attribute name="dockWidgetArea">
    <number>1</number>
   </attribute>
   <widget class="QWidget" name="dockWidgetContents_3"/>
  </widget>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections/>
</ui>

[SGaist]

What desktop environment are you using ?

[gde23]

The desktop environment is KDE (under Debian)
I've tested it on Windows 7 today, there the problem does not occur.

[SGaist]

What version of Qt for Windows ?

[gde23]

On Widows it's also Qt 5.11 which is the same as on the Debian machine (also installed over the Qt-Installer)