How to delete dots from QWidget?

mrjj

hi
This works for me to remove both dots and blue

void FocusControlDelegate::initStyleOption(QStyleOptionViewItem *option,
                                           const QModelIndex &index) const
{   
        option->state = option->state & ~QStyle::State_HasFocus;
        QStyledItemDelegate::initStyleOption(option, index);
}

void FocusControlDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
                                 const QModelIndex &index) const
{
    QStyleOptionViewItem myOption = QStyleOptionViewItem(option);
    if ( myOption.state & QStyle::State_Selected )
      myOption.state &= ~QStyle::State_Selected;

    QStyledItemDelegate::paint( painter, myOption, index );
}

TomNow99

Why I can't do:

 if ( myOption.state & QStyle::State_Selected )
      myOption.state &= ~QStyle::State_Selected;

in initStyleOption?

Yes that code works in paint() method for me too.

mrjj

Hi

Why I can't do in initStyleOption?

I dont think its called for all changes in selection etc so
it must be handled in paint.

I was wrong. This also works. ( with no paint() )

void FocusControlDelegate::initStyleOption(QStyleOptionViewItem *option,
                                           const QModelIndex &index) const
{
        option->state = option->state & ~QStyle::State_HasFocus;
        option->state &= ~QStyle::State_Selected;
        QStyledItemDelegate::initStyleOption(option, index);
}

TomNow99

@mrjj It doesn't work :(

I create very simple code:

#include "selectionkillerdelegate.h"

SelectionKillerDelegate::SelectionKillerDelegate()
{

}

void SelectionKillerDelegate::initStyleOption(QStyleOptionViewItem *option, const QModelIndex &index) const
{
    option->state = option->state & ~QStyle::State_HasFocus;
    option->state &= ~QStyle::State_Selected;
    QStyledItemDelegate::initStyleOption(option, index);
}

#include <QScrollBar>
#include <QFocusEvent>
#include <windows.h>
#include <QStandardItem>
#include "selectionkillerdelegate.h"
#include <QStandardItemModel>
#include <QCoreApplication>
myComboBox::myComboBox(QWidget *parent): QComboBox(parent)
{
    QStandardItemModel *model = new QStandardItemModel;

    QStandardItem *item = new QStandardItem("dsadsa");

    SelectionKillerDelegate *delegate = new SelectionKillerDelegate;

    model->setItem(0,0,item);

   item = new QStandardItem("32");

    model->setItem(1,0,item);

    item = new QStandardItem("53");

    model->setItem(2,0,item);

    item = new QStandardItem("7564");

    model->setItem(3,0,item);
    setItemDelegate(delegate);
    setModel(model);
}

When I do

    setItemDelegate(delegate); // that my Delegate

or

    setItemDelegate(new QStyledItemDelegate());

effect is the same: I don't see dots, but see selects.

mrjj

@TomNow99
Hi
Hmm, this is a combobox, right ?
Not a Table as i test with.

But it does call the delegate code right ?
So you can use the paint() vesion and it should work ?

Just to be sure its this light blue selection ?
alt text
Oh that is not the blue selection, its a hover effect.
The delegate does remove blue selection with he paint() \o/

TomNow99

@mrjj Yes, I was talking and still talk about QComboBox.

I did test.

My results:

On the right I have QComboBox without delegate. And here we can see dots around item, and blue select rectangle.

On the left i have QComboBox with delegate but QStyledItemDelegate:

setItemDelegate(new QStyledItemDelegate());

So I don't subclass QStyledItemDelegate, but use QT QStyledDelegate. Result? No dots, no select rectangle, only hover rectangle.

So I don't need any method like initStyleOption and paint to delete dots and select rectangle?

How Can I delete that hover rectangle?

mrjj

Hi
Hmm, you are right. simply giving it a plain QStyledItemDelegate
also removes both dots and selection colors.
That was pretty lucky :)

I dont know. Using stylesheet has side effects and on Windows it ignores palette.
https://stackoverflow.com/questions/37765673/changing-hover-style-for-qcombobox

TomNow99

@mrjj I thought about css. Do you know any delegate way?

Something like:

option->state = option->state & ~QStyle::State_HASHOVER;

Big letters because this doesn't exists ;)

mrjj

@TomNow99

Hi
It seems that

void FocusControlDelegate::initStyleOption(QStyleOptionViewItem *option,
                                           const QModelIndex &index) const
{
    option->state = option->state & ~QStyle::State_HasFocus;
    option->state &= ~QStyle::State_Selected;

    option->state &= ~QStyle::State_MouseOver;

    QStyledItemDelegate::initStyleOption(option, index);
}

does the trick.

TomNow99

@mrjj Wow. Perfect! Thank you! :)

mrjj

@TomNow99
Np.
I did
qDebug() << option->state;
to see what state was being used and State_MouseOver seemed promising :)

TomNow99

@mrjj I have other question ( I ask to many questions to better understand delegate ). I would like to use that subclass of QStyledItemDelegate, but now I would like to see dots and selections ( QStyledItemDelegate removes dots and selection colors ). How? I check:

        std::cout<<index.row();
        if(option.state & QStyle::State_Selected)
            std::cout<<"selected";
        if(option.state & QStyle::State_HasFocus)
            std::cout<<"focus";

and I see that item, which I hover give me text "selected" and "focus".

So I would like to use subclass of QStyledItemDelegate and have dots and selections colors.