Hi.
I' have a delegate for a QTableWidget which is a QDoubleSpinBox. Its purpose is editing the table.
I want to disable the validator for QDoubleSpinBox because i'm conneting the valueChanged() signal from the QDoubleSpinBox to a function this way:
Qt Code: 
  1. // connecting signal
  2. connect(editor,SIGNAL(valueChanged(double)),this,SLOT(editing(double)));
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Qt Code: 
  1. void DoubleSpinDelegate::editing(double value)
  2. {
  3.     QDoubleSpinBox *spin = static_cast<QDoubleSpinBox*>(sender());
  4.     emit commitData(spin);
  5. }
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I'm doing this for enabling a dynamic modification of the table. However, every time I commitData because the value is changed in the spinbox, it looks like a signal is sended to the spinbox for using the validator. For instance, I have in my table the value 1,45. I have a spinbox with 3 decimals so, when I try to edit the spinbox delegate opens with 1,450. Now if I edit any value after the comma the validator runs and just lets me edit 1 digit per time, so, if I wanna write 1,452 and I have 0,000 in the spinbox I have to write the 1, then highlight the first 0 and replace it by a 4, then I get 1,400... then, I have to highlight the second 0 and replace by 5 and so on...
I know that this is because the QDoubleValidator of the QLineEdit present in the QDoubleSpinBox... however I would like to disable it... If anyone knows how to do it I would appreciate it.

Just for having a context this is my class reimplementation of the delegate:

QDynSpinDelegate.h
Qt Code: 
  1. #ifndef QDYNSPINDELEGATE_H
  2. #define QDYNSPINDELEGATE_H
  3.  
  4. #include <QStyledItemDelegate>
  5. #include <QDoubleSpinBox>
  6. #include <QLineEdit>
  7.  
  8. class QDynSpinDelegate : public QStyledItemDelegate
  9. {
  10.     Q_OBJECT
  11.  
  12. public:
  13.     QDynSpinDelegate(QObject* parent);
  14.     QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const;
  15.     void setEditorData(QWidget *editor, const QModelIndex &index) const;
  16.     void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const;
  17.     void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const;
  18. private slots:
  19.     void editing(double value);
  20. };
  21.  
  22. #endif // QDYNSPINDELEGATE_H
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QDynSpinDelegate.cpp
Qt Code: 
  1. #include "QDynSpinDelegate.h"
  2.  
  3. QDynSpinDelegate::QDynSpinDelegate(QObject *parent) : QStyledItemDelegate(parent)
  4. {
  5. }
  6.  
  7. QWidget* QDynSpinDelegate::createEditor(QWidget* parent,const QStyleOptionViewItem &option,const QModelIndex &index) const
  8. {
  9.  
  10.     if(index.column() == 0)
  11.     {
  12.         QLineEdit* editor = new QLineEdit(parent);
  13.         return editor;
  14.     }
  15.     else
  16.     {
  17.         QDoubleSpinBox *editor = new QDoubleSpinBox(parent);
  18.         editor->setAccelerated(true);
  19.         editor->setFrame(false);
  20.         connect(editor,SIGNAL(valueChanged(double)),this,SLOT(editing(double)));
  21.         if(index.column() >=1 && index.column() <=3)
  22.         {
  23.             editor->setMinimum(-1000);
  24.             editor->setMaximum(1000);
  25.             editor->setDecimals(3);
  26.             editor->setSuffix(" m");
  27.             editor->setSingleStep(0.05);
  28.         }
  29.         else
  30.         {
  31.             editor->setMinimum(-360);
  32.             editor->setMaximum(360);
  33.             editor->setDecimals(3);
  34.             editor->setSuffix(" °");
  35.             editor->setSingleStep(0.5);
  36.         }
  37.         return editor;
  38.     }
  39.  
  40. }
  41. void QDynSpinDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
  42. {
  43.     if(index.column() == 0)
  44.     {
  45.         QString value = index.model()->data(index,Qt::EditRole).toString();
  46.         QLineEdit* line = static_cast<QLineEdit*>(editor);
  47.         line->setText(value);
  48.     }
  49.     else
  50.     {
  51.         double value = index.model()->data(index,Qt::EditRole).toDouble();
  52.         QDoubleSpinBox *spin = static_cast<QDoubleSpinBox*>(editor);
  53.         spin->setValue(value);
  54.     }
  55. }
  56. void QDynSpinDelegate::setModelData(QWidget* editor,QAbstractItemModel* model,const QModelIndex &index) const
  57. {
  58.     if(index.column() == 0)
  59.     {
  60.         QLineEdit* line = static_cast<QLineEdit*>(editor);
  61.         QString value = line->text();
  62.         model->setData(index,value);
  63.     }
  64.     else
  65.     {
  66.         QDoubleSpinBox* spin = static_cast<QDoubleSpinBox*>(editor);
  67.         double value = spin->value();
  68.         model->setData(index,value);
  69.     }
  70.  
  71. }
  72. void QDynSpinDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
  73. {
  74.         editor->setGeometry(option.rect);
  75. }
  76.  
  77. void QDynSpinDelegate::editing(double value)
  78. {
  79.     QDoubleSpinBox *spin = static_cast<QDoubleSpinBox*>(sender());
  80.     emit commitData(spin);
  81. }
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