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/***************************************************************************
KeywordWidget.cpp - widget for editing a list of keywords
-------------------
begin : Fri 02 2002
copyright : (C) 2002 by Thomas Eschenbacher
email : Thomas Eschenbacher <thomas.eschenbacher@gmx.de>
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include "config.h"
#include <QEvent>
#include <QKeyEvent>
#include <QPushButton>
#include <QLineEdit>
#include <QListWidget>
#include "KeywordWidget.h"
//***************************************************************************
Kwave::KeywordWidget::KeywordWidget(QWidget *parent)
:QWidget(parent), Ui::KeywordWidgetBase()
{
setupUi(this);
Q_ASSERT(edKeyword);
Q_ASSERT(btAdd);
Q_ASSERT(btAuto);
Q_ASSERT(btRemove);
Q_ASSERT(lstKeywords);
connect(edKeyword, SIGNAL(textChanged(QString)),
this, SLOT(editChanged(QString)));
connect(btAdd, SIGNAL(clicked()),
this, SLOT(add()));
connect(btAuto, SIGNAL(clicked()),
this, SLOT(autoClicked()));
connect(btRemove, SIGNAL(clicked()),
this, SLOT(remove()));
connect(lstKeywords, SIGNAL(itemActivated(QListWidgetItem*)),
this, SLOT(listClicked(QListWidgetItem*)));
connect(lstKeywords, SIGNAL(itemClicked(QListWidgetItem*)),
this, SLOT(listClicked(QListWidgetItem*)));
connect(lstKeywords, SIGNAL(itemDoubleClicked(QListWidgetItem*)),
this, SLOT(listClicked(QListWidgetItem*)));
// if the user presses return in the edit control, this means
// the same as clicking on the "Add" button
edKeyword->installEventFilter(this);
update();
}
//***************************************************************************
Kwave::KeywordWidget::~KeywordWidget()
{
}
//***************************************************************************
bool Kwave::KeywordWidget::contained(const QString &item)
{
if (!item.length()) return false;
return (!lstKeywords->findItems(item, Qt::MatchExactly).isEmpty());
}
//***************************************************************************
QStringList Kwave::KeywordWidget::keywords()
{
QStringList list;
unsigned int count = lstKeywords->count();
for (unsigned int index=0; index < count; ++index) {
QListWidgetItem *item = lstKeywords->item(index);
if (item && item->text().length())
list.append(item->text());
}
return list;
}
//***************************************************************************
void Kwave::KeywordWidget::setKeywords(const QStringList &keywords)
{
lstKeywords->clear();
edKeyword->clear();
foreach (const QString &it, keywords) {
QString item = it.simplified();
if (contained(item)) continue; // skip duplicate
lstKeywords->addItem(item);
}
lstKeywords->setSortingEnabled(true);
lstKeywords->sortItems();
edKeyword->clear();
update();
edKeyword->clear();
}
//***************************************************************************
void Kwave::KeywordWidget::update()
{
QString edit = edKeyword->text().simplified();
// "Add" is only allowed if the current edit space is not empty and
// the entered text is not already in the list
btAdd->setEnabled(edit.length() && !contained(edit));
// "Remove" is only enabled if something out of the list has been selected
btRemove->setEnabled((lstKeywords->currentItem() != nullptr) &&
(contained(edit) || !edit.length()));
// the list is only enabled if it is not empty
lstKeywords->setEnabled(lstKeywords->count() != 0);
// the current item should always be visible
lstKeywords->scrollToItem(lstKeywords->currentItem(),
QAbstractItemView::EnsureVisible);
}
//***************************************************************************
void Kwave::KeywordWidget::editChanged(const QString &edit)
{
QString text = edit.simplified();
QList<QListWidgetItem *> matches =
lstKeywords->findItems(text, Qt::MatchStartsWith);
if (edit.length() && !matches.isEmpty()) {
lstKeywords->setCurrentItem(matches.takeFirst());
update();
edKeyword->setText(edit);
} else {
update();
}
}
//***************************************************************************
void Kwave::KeywordWidget::returnPressed()
{
add(); // means the same as pressing "Add"
}
//***************************************************************************
void Kwave::KeywordWidget::add()
{
QString text = edKeyword->text().simplified();
if (!text.length()) return;
if (contained(text)) return;
// insert the current edit text and sort the list
lstKeywords->addItem(text);
lstKeywords->sortItems();
// find the new item again and make it the current selection
QList<QListWidgetItem *> matches =
lstKeywords->findItems(text, Qt::MatchStartsWith);
if (!matches.isEmpty())
lstKeywords->setCurrentItem(matches.takeFirst());
edKeyword->clear();
// now we do no longer need the edit
update();
edKeyword->clear();
}
//***************************************************************************
void Kwave::KeywordWidget::remove()
{
// remove the item from the list
int index = lstKeywords->currentRow();
delete lstKeywords->takeItem(index);
edKeyword->clear();
// set the previous item as current
if (index) --index;
if (lstKeywords->item(index))
lstKeywords->item(index)->setSelected(true);
edKeyword->clear();
update();
}
//***************************************************************************
void Kwave::KeywordWidget::listClicked(QListWidgetItem *item)
{
if (!item) return;
edKeyword->setText(item->text());
update();
}
//***************************************************************************
void Kwave::KeywordWidget::autoClicked()
{
emit autoGenerate();
}
//***************************************************************************
bool Kwave::KeywordWidget::eventFilter(QObject *sender, QEvent *event)
{
if (!event) return false;
if ((sender == edKeyword) && (event->type() == QEvent::KeyPress)) {
QKeyEvent *k = static_cast<QKeyEvent *>(event);
if ((k->key() == Qt::Key_Return) || (k->key() == Qt::Key_Enter)) {
add();
return true;
}
}
return QObject::eventFilter(sender, event);
}
//***************************************************************************
//***************************************************************************
#include "moc_KeywordWidget.cpp"
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