QTableWidget

[rick_st3]

Hi..
Can i create a table with certain cells with a "read only" property...??? i did look up the documentation of QTableWidget but did not find any answers... Any clues anyone...?? thanks...

[munna]

Each cell of QTableWidget is an object of QTableWidgetItem. You can use setFlags function of QTableWidgetItem class to make the cell read only.

[rick_st3]

thanks mate.... and also i wanted to know whether i can include a spinbox or a combobox in a cell...

[munna]

void setCellWidget ( int row, int column, QWidget * widget )

void setCellWidget ( int row, int column, QWidget * widget )

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[jpn]

Spin Box Delegate Example

[rick_st3]

got it..!! thanks all...!!

[rick_st3]

Each cell of QTableWidget is an object of QTableWidgetItem. You can use setFlags function of QTableWidgetItem class to make the cell read only.

i cannot set the flags off...!!! please help...!!!

[jpn]

i cannot set the flags off...!!! please help...!!!

Could you show us how you try to set them off?

[rick_st3]

Could you show us how you try to set them off?

thats exactly what i cannot think of..!!
I checked the documentation for setting the flag values but the problem is all of them are for enabling them...none of them are to disable them...!! i tried

exht->setFlags(Qt::ItemIsEditable(false));

exht->setFlags(Qt::ItemIsEditable(false));

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and

exht->setFlags(Qt::ItemIsEditable = 0);

exht->setFlags(Qt::ItemIsEditable = 0);

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and all possible combinations i could think of(Now i don't know if the code is right or no) but its just not helping...!!! please help...!!!

[jpn]

Use bitwise operators:

item->setFlags(item->flags() & ~Qt::ItemIsEditable);

item->setFlags(item->flags() & ~Qt::ItemIsEditable);

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[rick_st3]

Use bitwise operators:

item->setFlags(item->flags() & ~Qt::ItemIsEditable);

item->setFlags(item->flags() & ~Qt::ItemIsEditable);

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guru indeed...!!! thanks a ton mate...!!

[rick_st3]

Spin Box Delegate Example

i went through the tutorial...and now i can include a spinbox or a doublespinbox using delegates... but now what i cannot understand is what if i wanted to include the spinbox(or any other widget) in just a few cells(keeping the other cells normal) instead of the all the cells..??? will have to make another delegate to implement the QTableWidgetItem ...?? or is there any way i can apply the delegate to just a few cells instead of making a model of the entire table and then including the delegates..??? please advice... thanks...

[jpn]

There are several ways to achieve that. One extremely simple but not that dynamic way would be to check the column and row number in createEditor(). For example:

QWidget* MyItemDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    if (index.column() == 3 && index.row() > 2) {
        ...
        return customEditor;
    }
    return 0; // or return QItemDelegate::createEditor(parent, option, index);
}

QWidget* MyItemDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    if (index.column() == 3 && index.row() > 2) {
        ...
        return customEditor;
    }
    return 0; // or return QItemDelegate::createEditor(parent, option, index);
}

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A bit more flexible way would be to use user roles to store the information:

tableWidgetItem->setData(Qt::UserRole, true);
 
QWidget* MyItemDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    if (index.data(Qt::UserRole).toBool() == true) {
        ...
        return customEditor;
    }
    return 0; // or return QItemDelegate::createEditor(parent, option, index);
}

tableWidgetItem->setData(Qt::UserRole, true);

QWidget* MyItemDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    if (index.data(Qt::UserRole).toBool() == true) {
        ...
        return customEditor;
    }
    return 0; // or return QItemDelegate::createEditor(parent, option, index);
}

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You can also consider using item/cell widgets as already suggested, but just be aware that they don't really integrate to the model-view framework. They're just something laid by hand on top of views.