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/*
Copyright (C) 2017 Srivats P.
This file is part of "Ostinato"
This 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 3 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, see <http://www.gnu.org/licenses/>
*/
#ifndef _X_TABLE_VIEW_H
#define _X_TABLE_VIEW_H
#include <QTableView>
#include <QApplication>
#include <QClipboard>
#include <QKeyEvent>
#include <QMimeData>
#include <QPainter>
class XTableView : public QTableView
{
Q_OBJECT
public:
XTableView(QWidget *parent) : QTableView(parent) {}
virtual ~XTableView() {}
void setModel(QAbstractItemModel *model)
{
// This is only a heuristic, but works for us
if (model && model->supportedDropActions() != Qt::IgnoreAction)
_modelAllowsRemove = true;
else
_modelAllowsRemove = false;
QTableView::setModel(model);
}
bool hasSelection() const
{
return !selectionModel()->selectedIndexes().isEmpty();
}
bool canCut() const
{
return _modelAllowsRemove;
}
bool canPaste(const QMimeData *data) const
{
return model()->canDropMimeData(data, Qt::CopyAction,
0, 0, QModelIndex());
}
public slots:
void cut()
{
copy();
foreach(QItemSelectionRange range, selectionModel()->selection())
model()->removeRows(range.top(), range.height());
}
void copy()
{
// Copy selection to clipboard (base class copies only current item)
// Selection, by default, is in the order in which items were selected
// - sort them before copying
QModelIndexList selected = selectionModel()->selectedIndexes();
if (selected.isEmpty())
return;
std::sort(selected.begin(), selected.end());
QMimeData *mimeData = model()->mimeData(selected);
copyPlainText(selected, mimeData);
qApp->clipboard()->setMimeData(mimeData);
qDebug("Copied data in %d format(s) to clipboard",
mimeData->formats().size());
for (int i = 0; i < mimeData->formats().size(); i++) {
qDebug(" %d: %s, %d bytes", i+1,
qPrintable(mimeData->formats().at(i)),
mimeData->data(mimeData->formats().at(i)).size());
}
}
void paste()
{
const QMimeData *mimeData = qApp->clipboard()->mimeData();
if (!mimeData || mimeData->formats().isEmpty())
return;
if (selectionModel()->hasSelection()
&& selectionModel()->selection().size() > 1) {
qWarning("Cannot paste into multiple(%d) selections",
selectionModel()->selection().size());
return;
}
// If no selection, insert at the end
int row, column;
if (selectionModel()->hasSelection()
&& selectionModel()->selection().size() == 1) {
row = selectionModel()->selection().first().top();
column = selectionModel()->selection().first().left();
} else {
row = model()->rowCount();
column = model()->columnCount();
}
if (model()->canDropMimeData(mimeData, Qt::CopyAction,
row, column, QModelIndex()))
model()->dropMimeData(mimeData, Qt::CopyAction,
row, column, QModelIndex());
}
protected:
virtual void paintEvent(QPaintEvent *event)
{
if (!model()->hasChildren()) {
QPainter painter(viewport());
style()->drawItemText(&painter, viewport()->rect(),
layoutDirection() | Qt::AlignCenter, palette(),
true, whatsThis(), QPalette::WindowText);
}
else
QTableView::paintEvent(event);
}
virtual void keyPressEvent(QKeyEvent *event)
{
if (event->matches(QKeySequence::Cut)) {
cut();
} else if (event->matches(QKeySequence::Copy)) {
copy();
} else if (event->matches(QKeySequence::Paste)) {
paste();
} else
QTableView::keyPressEvent(event);
}
private:
void copyPlainText(const QModelIndexList &indexes, QMimeData *mimeData)
{
if (mimeData->hasText())
return;
bool includeHeaders = (selectionBehavior()
!= QAbstractItemView::SelectItems);
QString text;
if (includeHeaders) {
int start = 0, end = model()->columnCount(); // assume SelectRows
if (selectionBehavior() == QAbstractItemView::SelectColumns) {
start = indexes.first().column();
end = indexes.last().column()+1;
}
text.append("\t"); // column header for row number/title
for (int i = start; i < end; i++)
if (indexes.contains(model()->index(indexes.first().row(), i)))
text.append(model()->headerData(i, Qt::Horizontal)
.toString().replace('\n', ' ')
+"\t");;
text.append("\n");
}
int lastRow = -1;
foreach(QModelIndex index, indexes) {
if (index.row() != lastRow) { // row changed
if (lastRow >= 0)
text.append("\n");
if (includeHeaders)
text.append(model()->headerData(index.row(), Qt::Vertical)
.toString()+"\t");
}
else
text.append("\t");
text.append(model()->data(index).toString());
lastRow = index.row();
}
text.append("\n");
mimeData->setText(text);
}
bool _modelAllowsRemove{false};
};
#endif
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