MdiArea first window not being selected

[ChrisW67]

No, nothing. If there is only one child it is the active child on all my MDI apps under Linux/Windows. How are you adding these sub-windows to the MDI area?

[parsnips146]

Hi

Here is the code which creates the children.

bool MainWindow::LoadRecentFiles()
{
    if(!recentFiles.empty())
    {
	for (int x = 0; x < (recentFiles.size()); ++x)
	{
	    ceguSubWidget *child = new ceguSubWidget();
	    mdiArea->addSubWindow(child);
	    if (child->load(recentFiles.at(x)))
		child->show();
	    else
		child->close();
	}
	return true;
    }
    else
	return false;
}

bool MainWindow::LoadRecentFiles()
{
    if(!recentFiles.empty())
    {
	for (int x = 0; x < (recentFiles.size()); ++x)
	{
	    ceguSubWidget *child = new ceguSubWidget();
	    mdiArea->addSubWindow(child);
	    if (child->load(recentFiles.at(x)))
		child->show();
	    else
		child->close();
	}
	return true;
    }
    else
	return false;
}

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Thanks

[ChrisW67]

Some observations and questions.

• Do you want to capture the return value from addSubWindow and use show() and close() against that?
• Perhaps only add the sub window if the child successfully opens the recent file (but be careful to delete if it fails).
• Your method can return true even if none of the recent files could be opened.
• Does your ceguSubWidget class set Qt::WA_DeleteOnClose (see the QMdiArea::addSubWindow() docs)? This affects focus behaviour of the remaining windows when close() is called.

[parsnips146]

The ceguSub Wiget does have the deleteonclose option set when it is created.

I have modified the creation code but it still has the same problems.

bool MainWindow::LoadRecentFiles()
{
 
    if(!recentFiles.empty())
    {
	for (int x = 0; x < (recentFiles.size()); ++x)
	{
	    ceguSubWidget *child = new ceguSubWidget();
	    if	(mdiArea->addSubWindow(child))
	    {
		if (child->load(recentFiles.at(x)))
		{
		    child->show();
		    return true;
		}
		else
		{
		    child->close();
		    return false;
		}
	    }
	}
    }
 
    return false;
}

bool MainWindow::LoadRecentFiles()
{

    if(!recentFiles.empty())
    {
	for (int x = 0; x < (recentFiles.size()); ++x)
	{
	    ceguSubWidget *child = new ceguSubWidget();
	    if	(mdiArea->addSubWindow(child))
	    {
		if (child->load(recentFiles.at(x)))
		{
		    child->show();
		    return true;
		}
		else
		{
		    child->close();
		    return false;
		}
	    }
	}
    }

    return false;
}

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[parsnips146]

I have found the issue it was that load RecentFiles was called before the mainwindow had been set to show.

thanks for your help

James

[ChrisW67]

Excellent.

On closer reading it seems my Qt::WA_DeleteOnClose comment only applies to the QMdiSubWindow and not its contents anyway.