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/* uat_delegate.cpp
* Delegates for editing various field types in a UAT record.
*
* Copyright 2016 Peter Wu <peter@lekensteyn.nl>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "uat_delegate.h"
#include "epan/value_string.h"
#include <QComboBox>
#include <QEvent>
#include <QFileDialog>
#include <QLineEdit>
UatDelegate::UatDelegate(QObject *parent) : QStyledItemDelegate(parent)
{
}
uat_field_t *UatDelegate::indexToField(const QModelIndex &index) const
{
const QVariant v = index.model()->data(index, Qt::UserRole);
return static_cast<uat_field_t *>(v.value<void *>());
}
QWidget *UatDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
uat_field_t *field = indexToField(index);
switch (field->mode) {
case PT_TXTMOD_DIRECTORYNAME:
case PT_TXTMOD_FILENAME:
// TODO tab navigation from this field is broken.
// Do not create editor, a dialog will be opened in editorEvent
return 0;
case PT_TXTMOD_ENUM:
{
// Note: the string repr. is written, not the integer value.
QComboBox *editor = new QComboBox(parent);
const value_string *enum_vals = (const value_string *)field->fld_data;
for (int i = 0; enum_vals[i].strptr != NULL; i++) {
editor->addItem(enum_vals[i].strptr);
}
return editor;
}
case PT_TXTMOD_STRING:
// TODO add a live validator? Should SyntaxLineEdit be used?
return QStyledItemDelegate::createEditor(parent, option, index);
case PT_TXTMOD_HEXBYTES:
{
// Requires input of the form "ab cd ef" (with possibly no or a colon
// separator instead of a single whitespace) for the editor to accept.
QRegExp hexbytes_regex("([0-9a-f]{2}[ :]?)*");
hexbytes_regex.setCaseSensitivity(Qt::CaseInsensitive);
// QString types from QStyledItemDelegate are documented to return a
// QLineEdit. Note that Qt returns a subclass from QLineEdit which
// automatically adapts the width to the typed contents.
QLineEdit *editor = static_cast<QLineEdit *>(
QStyledItemDelegate::createEditor(parent, option, index));
editor->setValidator(new QRegExpValidator(hexbytes_regex, editor));
return editor;
}
case PT_TXTMOD_NONE:
return 0;
default:
g_assert_not_reached();
return 0;
}
}
void UatDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
uat_field_t *field = indexToField(index);
switch (field->mode) {
case PT_TXTMOD_ENUM:
{
QComboBox *combobox = static_cast<QComboBox *>(editor);
const QString &data = index.model()->data(index, Qt::EditRole).toString();
#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
combobox->setCurrentText(data);
#else
int new_index = combobox->findText(data);
if (new_index >= 0) {
combobox->setCurrentIndex(new_index);
}
#endif
break;
}
default:
QStyledItemDelegate::setEditorData(editor, index);
}
}
void UatDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
const QModelIndex &index) const
{
uat_field_t *field = indexToField(index);
switch (field->mode) {
case PT_TXTMOD_ENUM:
{
QComboBox *combobox = static_cast<QComboBox *>(editor);
const QString &data = combobox->currentText();
model->setData(index, data, Qt::EditRole);
break;
}
default:
QStyledItemDelegate::setModelData(editor, model, index);
}
}
#if 0
// Qt docs suggest overriding updateEditorGeometry, but the defaults seem sane.
void UatDelegate::updateEditorGeometry(QWidget *editor,
const QStyleOptionViewItem &option, const QModelIndex &index) const
{
QStyledItemDelegate::updateEditorGeometry(editor, option, index);
}
#endif
bool UatDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
{
uat_field_t *field = indexToField(index);
switch (field->mode) {
case PT_TXTMOD_DIRECTORYNAME:
case PT_TXTMOD_FILENAME:
if (event && (event->type() == QEvent::MouseButtonRelease ||
event->type() == QEvent::MouseButtonDblClick)) {
// Ignore these mouse events, only handle MouseButtonPress.
return false;
}
if (index.isValid()) {
QString filename_old = model->data(index, Qt::EditRole).toString();
QString filename = openFileDialog(field, filename_old);
// TODO should this overwrite only when !filename.isEmpty()?
model->setData(index, filename, Qt::EditRole);
}
// returns false to ensure that QAbstractItemView::edit does not assume
// the editing state. This causes the view's currentIndex to be changed
// to the cell where this delegate was "created", as desired.
return false;
default:
return QStyledItemDelegate::editorEvent(event, model, option, index);
}
}
QString UatDelegate::openFileDialog(uat_field_t *field, const QString &cur_path) const
{
// Note: file dialogs have their parent widget set to NULL because we do not
// have an editor nor the view that would attach us.
switch (field->mode) {
case PT_TXTMOD_DIRECTORYNAME:
return QFileDialog::getExistingDirectory(NULL, field->title, cur_path);
case PT_TXTMOD_FILENAME:
return QFileDialog::getOpenFileName(NULL, field->title, cur_path,
QString(), NULL, QFileDialog::DontConfirmOverwrite);
default:
g_assert_not_reached();
return 0;
}
}
/* * Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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