Qt4 widget and nested layout issue.

[bunjee]

Hey all,

I've got a problem with a nested layout.
First off I'm creating the main widget items.
Then I'm passsing it to my first view to create its Qt components :

ZeLoginView::ZeLoginView(QWidget *parent, ZeClientController& clientController) : 
QWidget(parent)

ZeLoginView::ZeLoginView(QWidget *parent, ZeClientController& clientController) : 
QWidget(parent)

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At the end of the process I'm deleting this view and free the layout of my main widget :

void ZeGlobalController::SetView(ViewMode viewMode)
{
	delete this->layout(); [...]
}

void ZeGlobalController::SetView(ViewMode viewMode)
{
	delete this->layout(); [...]
}

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Finally I'm passing my main widget to another view with a "Nested layout" :

ZeUserView::ZeUserView(QWidget *parent, ZeUserController& userController) : 
QWidget(parent)
{
	ZeLog::Get()->AddLine("--- Creating the user view ---\n");
 
	mUserLayout = new QVBoxLayout(parent);
 
	// User Infos
 
	mUserInfoLayout = new QGridLayout;
 
	// User picture
	mUserPictureLabel = new QLabel;
	mUserPictureLabel->setPixmap(QPixmap("zeData/profil_no_pic.jpg"));
	mUserInfoLayout->addWidget(mUserPictureLabel, 1, 1, Qt::AlignCenter);
 
	// Login label
	mLoginLabel = new QLabel;
	mLoginLabel->setText(tr("Login"));
	mUserInfoLayout->addWidget(mLoginLabel, 2, 1, Qt::AlignCenter);
 
	// Message combo box
	mMessageComboBox = new QLineEdit;
	mMessageComboBox->setFixedWidth(100);
	mUserInfoLayout->addWidget(mMessageComboBox, 3, 1, Qt::AlignCenter);
 
	// Status combo box
	mStatusComboBox = new QComboBox;
	mStatusComboBox->setEditable(true);
	mStatusComboBox->setFixedWidth(100);
	mUserInfoLayout->addWidget(mStatusComboBox, 4, 1, Qt::AlignCenter);
 
	// Layout stretch
	mUserInfoLayout->setColumnStretch(0, 10);
	mUserInfoLayout->setColumnStretch(2, 10);
 
	mUserLayout->addLayout(mUserInfoLayout);
 
}

ZeUserView::ZeUserView(QWidget *parent, ZeUserController& userController) : 
QWidget(parent)
{
	ZeLog::Get()->AddLine("--- Creating the user view ---\n");

	mUserLayout = new QVBoxLayout(parent);

	// User Infos

	mUserInfoLayout = new QGridLayout;

	// User picture
	mUserPictureLabel = new QLabel;
	mUserPictureLabel->setPixmap(QPixmap("zeData/profil_no_pic.jpg"));
	mUserInfoLayout->addWidget(mUserPictureLabel, 1, 1, Qt::AlignCenter);

	// Login label
	mLoginLabel = new QLabel;
	mLoginLabel->setText(tr("Login"));
	mUserInfoLayout->addWidget(mLoginLabel, 2, 1, Qt::AlignCenter);

	// Message combo box
	mMessageComboBox = new QLineEdit;
	mMessageComboBox->setFixedWidth(100);
	mUserInfoLayout->addWidget(mMessageComboBox, 3, 1, Qt::AlignCenter);

	// Status combo box
	mStatusComboBox = new QComboBox;
	mStatusComboBox->setEditable(true);
	mStatusComboBox->setFixedWidth(100);
	mUserInfoLayout->addWidget(mStatusComboBox, 4, 1, Qt::AlignCenter);

	// Layout stretch
	mUserInfoLayout->setColumnStretch(0, 10);
	mUserInfoLayout->setColumnStretch(2, 10);

	mUserLayout->addLayout(mUserInfoLayout);

}

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For some reason the nested layout : mUserInfoLayout, never appears : blank window.

And even more strange, it's working in two cases:
1. If I don't use nested layout to show my components.
2. Working with nested stuff If I'm creating the second view at first.

Looks like something is messed up between the first view and the second creation.

There must be something wrong with the main widget, is there anything I could have forgot beside the delete layout() ?

In advance thanks.

Ben.