Install event filter for custom widget hides the widget

NewMoon

Hello All,

I have a custom widget (MyCustomWidget), and inside MyCustomWidget, I have added a grid layout with some child widgets in it. Then I have added this MyCustomWidget in another QVBoxLayout.

I want to enable and disable the MyCustomWidget using mouse click. So I used install event filter for MyCustomWidget and the child widgets. If I use this install event filter then MyCustomWidget is not showing at all. If I remove the install event filter then the MyCustomWidget is showing.

Here's my code sample.

```
MyCustomWidget  *enableDisableWidget = new MyCustomWidget(this);
enableDisableWidget ->setObjectName("EnableOrDisableCusotmWidget");
enableDisableWidget ->installEventFilter(this);

MyCustomChildLabel  * myLabel  =  new MyCustomChildLabel (enableDisableWidget );
myLabel->setObjectName("CustomLabe1l");
myLabel->setText("Label1");
myLabel->setStyleSheet("color: black");
myLabel->installEventFilter(this);

MyCustomChildLabel  * myLabel1  = new MyCustomChildLabel  (enableDisableWidget);
myLabel1 ->setObjectName("CusotomLabel2");
myLabel1 ->setStyleSheet("color: black");
myLabel1 ->installEventFilter(this);

QGridLayout *lay = new QGridLayout;
lay ->addWidget(myLabel, 0, 0,1,1);
lay ->addWidget(myLabel1,0, 1,1,1);

enableDisableWidget->setLayout(lay);

Then I add this MyCusotmWidget to another QVBoxLayout where other QWidgets gets added to the layout.

QVBoxLayout *verticalLayout = new QVBoxLayout;
verticalLayout ->addWidget(new QPushButton("OK", this),1,Qt::AlignLeft);
verticalLayout ->addWidget(new QLineEdit(this), 1, Qt::AlignLefr;);
verticalLayout ->addWidget(enableDisableWidget,10,Qt::AlignLeft);

this->setLayout(verticalLayout);

The problem is, here MyCustomwidget is not shown in the verticalLayout. I can see the QPushButton and the QLineEdit, but not the MyCustomWidget. If I Remove the Install event filter for the MyCustomWidgets then it is shown. Please give me your suggestions.

SGaist

Hi,

Please show your implementation of the eventFilter method.

NewMoon

This post is deleted!

NewMoon

@SGaist

Here's my event filter function.

bool MyClass::eventFilter(QObject *obj, QEvent *evt)
{
    if(obj->parent() != NULL && obj->parent() == enableDisableWidget ) 
    {
        if(evt->type() == QEvent::MouseButtonPress)
        {
        if(enableDisableWidget ->isEnabled())
            enableDisableWidget->setEnabled(false);
        else 
            enableDisableWidget->setEnabled(true);
        }
        return false;
    }

    return QWidget::eventFilter(obj,evt);
}

SGaist

Since you are just changing the enable state, why aren't you letting the base class handle all the other events ?