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View Full Version : Custom QStyledItemDelegate (QToolButton) - hovering instead of edit



Sven
13th February 2011, 21:42
Hello folks,

I've got a little issue with my custom StyledItemDelegate. I have got a list view where I want to add a remove button on the first column. This works pretty good but it is just visible in edit mode, but I want to have it visible when I hover the row.

Can anyone give me a hint how to implement this?

buttondelegate.h


#ifndef BUTTONDELEGATE_H_
#define BUTTONDELEGATE_H_

#include <QStyledItemDelegate>

class ButtonDelegate : public QStyledItemDelegate
{
Q_OBJECT

public:
ButtonDelegate(QObject *aParent);

QWidget *createEditor(
QWidget *aParent,
const QStyleOptionViewItem &aOption,
const QModelIndex &aIndex) const;

virtual void setEditorData(
QWidget *aEditor,
const QModelIndex &aIndex) const;

virtual void setModelData(
QWidget *aEditor,
QAbstractItemModel *aModel,
const QModelIndex &aIndex) const;

virtual void updateEditorGeometry(
QWidget *aEditor,
const QStyleOptionViewItem &aOption,
const QModelIndex &aIndex) const;

};

#endif




#include "buttondelegate.h"

#include <QToolButton>
#include <QApplication>

//-----------------------------------------------------------------------------
ButtonDelegate::ButtonDelegate(QObject *aParent)
: QStyledItemDelegate(aParent)
{
}

//-----------------------------------------------------------------------------
QWidget *ButtonDelegate::createEditor(
QWidget *aParent,
const QStyleOptionViewItem & /*aOption*/,
const QModelIndex &aIndex) const
{
if (aIndex.column() == 0) {
QToolButton *btn = new QToolButton(aParent);
btn->setText("...");
//btn->setAutoRaise(true);
btn->setCheckable(true);
btn->setFixedSize(QSize(16, 16));

return btn;
}

return NULL;
}

//-----------------------------------------------------------------------------
void ButtonDelegate::setEditorData(
QWidget * /*aEditor */,
const QModelIndex & /*aIndex*/) const
{
}

//-----------------------------------------------------------------------------
void ButtonDelegate::setModelData(
QWidget *aEditor,
QAbstractItemModel *aModel,
const QModelIndex &aIndex) const
{
//QApplication::processEvents();
if (static_cast<QToolButton*>(aEditor)->isChecked())
aModel->removeRow(aIndex.row());
}

//-----------------------------------------------------------------------------
void ButtonDelegate::updateEditorGeometry(
QWidget *aEditor,
const QStyleOptionViewItem &aOption,
const QModelIndex & /*aIndex*/) const
{
aEditor->setGeometry(aOption.rect);
}


And yes I have searched on the forum and found some things but they didn't help.

Kind regards,
Sven

wysota
14th February 2011, 00:23
You can throw away your implementation because it's wrong and search the forum again. This question has already been answered lots of times. So far you made an editor for your item.