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