workaround to showing a widget when replacing hidden widget in splitter

[user4592357]

i have a splitter where i insert widgets which might later need to be replaced.
when the splitter has a widget which is hidden, then when i replace the widget, the new widget is hidden too (from docs: The geometry of the newly inserted widget will be the same as the widget it replaces. Its visible and collapsed states are also inherited.)

so i wanna know how i can do the widget replacement to get the newly inserted widget displayed regardless of the previous widget's visibility.

sample code:

#include <QSplitter>
#include <QLineEdit>
#include <QComboBox>
#include <QPushButton>

class WidgetContainer : public QWidget
{
	Q_OBJECT
public:
	WidgetContainer() : m_pSplitter(new QSplitter(Qt::Horizontal, this))
	{
	}

	void setWidget(QWidget *widget)
	{
		if (m_pSplitter->widget(0))
			m_pSplitter->replaceWidget(0, widget);
		else
			m_pSplitter->insertWidget(0, widget);
	}

public slots:
	void addWidget()
	{
		setWidget(new QComboBox);
		show();
	}

private:
	QSplitter *m_pSplitter = nullptr;
};

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);
	WidgetContainer window;

	auto pLineEdit = new QLineEdit;
	pLineEdit->hide(); // note: initial widget is hidden
	window.setWidget(pLineEdit);

	auto pBtn = new QPushButton(&window);

	QObject::connect(pBtn, &QPushButton::clicked, &window, &WidgetContainer::addWidget);

	window.show();

	return app.exec();
}

[SGaist]

Hi,

In that case, why not remove the old one and insert the new one ?

[user4592357]

@SGaist
yeah but how do i remove it?
when i tried to get splitter's layout it was null

[SGaist]

My bad, there's indeed no remove method. I was on the wrong page of the documentation.

One thing you can try is to reparent the widget and then insert the new one.

[user4592357]

@SGaist
i don't wanna re-parent cause i don't own the widget.
i just hided the previous widget and inserted the new one