How can I add QTableWidget properties to a custom QWidget designer widget?

KidTrent

I've created a custom designer widget that has a QTableWidget and two QPushButton's. I would like the QTableWidget properties and QPushButton properties to be configurable in the custom widgets Qt Designer properties panel. How can I do this?

I thought simply using a Q_PROPERTY macro would work, but it doesn't appear to have any effect as the properties don't appear after I restart Qt with the updated DLL.

Q_PROPERTY(QTableWidget* tableWidget READ GetTableWidget);

Here is the code for the widget, the plugin code is still the default that the wizard created/

EditableWidget.h

#ifndef EDITABLETABLEWIDGET_H
#define EDITABLETABLEWIDGET_H

#include <QDialog>

class QTableWidget;

namespace Ui {
class EditableTableWidget;
}

class EditableTableWidget : public QDialog
{
    Q_OBJECT
    Q_PROPERTY(QTableWidget* tableWidget READ GetTableWidget);

public:
    explicit EditableTableWidget(
            QWidget *parent = nullptr);

    ~EditableTableWidget();

private:
    QString GetBtnText() const;

    void SetBtnText(QString btnText);

    QTableWidget* GetTableWidget() const;

    Ui::EditableTableWidget *ui;
};

#endif // EDITABLETABLEWIDGET_H

EditableWidget.cpp

#include "EditableTableWidget.h"
#include "ui_EditableTableWidget.h"


EditableTableWidget::EditableTableWidget(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::EditableTableWidget)
{
    ui->setupUi(this);
}

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

QString EditableTableWidget::GetBtnText() const
{
    return ui->AddRowBtn->text();
}

void EditableTableWidget::SetBtnText(QString btnText)
{
    ui->AddRowBtn->setText(btnText);
}

QTableWidget* EditableTableWidget::GetTableWidget() const
{
    return ui->TableWidget;
}

EditableWidget.h

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>EditableTableWidget</class>
 <widget class="QDialog" name="EditableTableWidget">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>280</width>
    <height>240</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Dialog</string>
  </property>
  <widget class="QTableWidget" name="TableWidget">
   <property name="geometry">
    <rect>
     <x>10</x>
     <y>10</y>
     <width>261</width>
     <height>192</height>
    </rect>
   </property>
  </widget>
  <widget class="QPushButton" name="AddRowBtn">
   <property name="geometry">
    <rect>
     <x>190</x>
     <y>210</y>
     <width>80</width>
     <height>21</height>
    </rect>
   </property>
   <property name="text">
    <string>Add Row</string>
   </property>
  </widget>
  <widget class="QPushButton" name="DeleteRowBtn">
   <property name="geometry">
    <rect>
     <x>100</x>
     <y>210</y>
     <width>80</width>
     <height>21</height>
    </rect>
   </property>
   <property name="text">
    <string>Delete Row</string>
   </property>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>

Christian Ehrlicher

How should the designer know what to do with a pointer to a Qt class?
You have to expose the properties you want by yourself.

KidTrent

Re: How can I add QTableWidget properties to a custom QWidget designer widget?

Is there not a way to automatically expose all the available properties when a pointer is provided...?

Hmm, then how can I make it so the user can specify the Column names? For example when you double click a QTableWidget, you can add/remove/edit Columns/Rows/Items.... but if the QTableWidget is in my CustomWidget, this doesn't work (instead the object name field opens up)...

I guess my questions is now... how can I change the double click functionality in the designer for my custom widget to activate the functionality on the table I created within it?

Bonnie

I haven't tried that but I'm sure that at least you need to write and build your own Qt designer plugin.
https://doc.qt.io/qt-5/designer-creating-custom-widgets.html

Christian Ehrlicher

@KidTrent said in How can I add QTableWidget properties to a custom QWidget designer widget?:

Is there not a way to automatically expose all the available properties when a pointer is provided...?

No, it's not since it's not a common usecase - feel free to provide a patch for designer.

For example when you double click a QTableWidget

Use a proper model instead convenience widgets

KidTrent

@Christian-Ehrlicher

Great, thanks for the help/clarification!