Custom widget works well until closing and reopening QtCreator

T.Caz

Hi everyone,
I made a custom widget plugin for QtDesigner inherited from QAbstractButton.
The plugin load well and I am able to drag and drop it into my UI as shown on picture below.

Média2.gif

My issue append when I save my .ui, I am closing QtCreator and then, when I am launching QtCreator and reopen my .ui in my project, the widget seems like it have lost its properties and the properties inherited from QAbstractButton. However when I drag and drop an other instance of the widget it seems to load properly until I repeat the procedure (Closing QtCreator and reopening it and project). Picture below to see what appen after closing QtCreator and reopening project.

Média1.gif

When I am compiling and launching generated app, the widget works well.

I feel like issue comes from domXml method but I am not sure and all my try were unsuccessfull.

Here are the plugin source code :

MyWidgetPlugin.h

#ifndef TOGGLEBUTTONPLUGIN
#define TOGGLEBUTTONPLUGIN

#include <QtUiPlugin/QDesignerCustomWidgetInterface>

class ToggleButtonplugin : 	public QObject,
        public QDesignerCustomWidgetInterface
{
    Q_OBJECT

    Q_INTERFACES(QDesignerCustomWidgetInterface)
#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
    Q_PLUGIN_METADATA(IID "com.Qt.CustomWidgets")
#endif

public:

    ToggleButtonplugin(QObject* pParent = Q_NULLPTR);

    QString name() const override;
    QString group() const override;
    QString toolTip() const override;
    QString whatsThis() const override;
    QString includeFile() const override;
    QIcon icon() const override;

    bool isInitialized() const override;
    bool isContainer() const override;

    QString domXml(void) const override;

    QWidget *createWidget(QWidget *parent) override;

private:

    bool initialized;

};

#endif // TOGGLEBUTTONPLUGIN

MyWidgetPlugin.cpp

#include "togglebuttonplugin.h"
#include "togglebuttonwidget.h"


#include <QtPlugin>

ToggleButtonplugin::ToggleButtonplugin(QObject* pParent) :
    QObject(pParent),
    initialized(true)
{}

QString ToggleButtonplugin::name() const
{
    return "ToggleButton";
}

QString ToggleButtonplugin::group() const
{
    return tr("PSR Custom Widgets");
}

QString ToggleButtonplugin::toolTip() const
{
    return tr("");
}

QString ToggleButtonplugin::whatsThis() const
{
    return tr("");
}

QString ToggleButtonplugin::includeFile() const
{
    return "togglebuttonwidget.h";
}

QIcon ToggleButtonplugin::icon() const
{
    return QIcon(":/icon/checked");
}

bool ToggleButtonplugin::isContainer() const
{
    return false;
}

QString ToggleButtonplugin::domXml(void) const
{
    return QLatin1String("<ui language=\"c++\"><widget class=\"ToggleButton\" name=\"togglebutton\"/>\n<customwidgets>\n<customwidget><class>ToggleButtonWidget</class>\n<extends>QAbstractButton</extends>\n</customwidget>\n</customwidgets>\n</ui>");
}

bool ToggleButtonplugin::isInitialized() const
{
    return initialized;
}

QWidget * ToggleButtonplugin::createWidget(QWidget *parent)
{
    return new ToggleButtonWidget(parent);
}

#if QT_VERSION < QT_VERSION_CHECK(5,0,0)
Q_EXPORT_PLUGIN2(togglebuttonplugin, ToggleButtonPlugin)
#endif

Config :
Windows 10
Qt 5.15.1
QtCreator 4.14.1
Compilator : MSVC/MinGW same issues

Any help would be welcome. Thanks

T.Caz

It was an evident mistake. name() method were not returning widget class name.

I mind myself by thinking this was the equivalent of domXml() <ui language="c++" displayname="...">