void QueueManagerWidget::updateButtons()
{
QModelIndexList idx = view->selectionModel()->selectedRows();
if (idx.count() == 0)
{
move_top->setEnabled(false);
move_up->setEnabled(false);
move_down->setEnabled(false);
move_bottom->setEnabled(false);
}
else
{
move_top->setEnabled(idx.front().row() != 0);
move_up->setEnabled(idx.front().row() != 0);
int rows = model->rowCount(QModelIndex());
move_down->setEnabled(idx.back().row() != rows - 1);
move_bottom->setEnabled(idx.back().row() != rows - 1);
}
}
void ExtendedTableWidget::paste()
{
// Get list of selected items
QItemSelectionModel* selection = selectionModel();
QModelIndexList indices = selection->selectedIndexes();
// Abort if there's nowhere to paste
if(indices.isEmpty())
return;
SqliteTableModel* m = qobject_cast<SqliteTableModel*>(model());
// We're also checking for system clipboard data first. Only if the data in the system clipboard is not ours, we use the system
// clipboard, otherwise we prefer the internal buffer. That's because the data in the internal buffer is easier to parse and more
// accurate, too. However, if we always preferred the internal copy-paste buffer there would be no way to copy data from other
// applications in here once the internal buffer has been filled.
// If clipboard contains an image and no text, just insert the image
const QMimeData* mimeClipboard = qApp->clipboard()->mimeData();
if (mimeClipboard->hasImage() && !mimeClipboard->hasText()) {
QImage img = qApp->clipboard()->image();
QByteArray ba;
QBuffer buffer(&ba);
buffer.open(QIODevice::WriteOnly);
img.save(&buffer, "PNG"); // We're always converting the image format to PNG here. TODO: Is that correct?
buffer.close();
m->setData(indices.first(), ba);
return;
}
// Get the clipboard text
QString clipboard = qApp->clipboard()->text();
// If data in system clipboard is ours and the internal copy-paste buffer is filled, use the internal buffer; otherwise parse the
// system clipboard contents (case for data copied by other application).
QList<QByteArrayList> clipboardTable;
QList<QByteArrayList>* source;
if(mimeClipboard->hasHtml() && mimeClipboard->html().contains(m_generatorStamp) && !m_buffer.isEmpty())
{
source = &m_buffer;
} else {
clipboardTable = parseClipboard(clipboard);
source = &clipboardTable;
}
// Stop here if there's nothing to paste
if(!source->size())
return;
// Starting from assumption that selection is rectangular, and then first index is upper-left corner and last is lower-right.
int rows = source->size();
int columns = source->first().size();
int firstRow = indices.front().row();
int firstColumn = indices.front().column();
int selectedRows = indices.back().row() - firstRow + 1;
int selectedColumns = indices.back().column() - firstColumn + 1;
// If last row and column are after table size, clamp it
int lastRow = qMin(firstRow + rows - 1, m->rowCount() - 1);
int lastColumn = qMin(firstColumn + columns - 1, m->columnCount() - 1);
// Special case: if there is only one cell of data to be pasted, paste it into all selected fields
if(rows == 1 && columns == 1)
{
QByteArray data = source->first().first();
for(int row=firstRow;row<firstRow+selectedRows;row++)
{
for(int column=firstColumn;column<firstColumn+selectedColumns;column++)
m->setData(m->index(row, column), data);
}
return;
}
// If more than one cell was selected, check if the selection matches the cliboard dimensions
if(selectedRows != rows || selectedColumns != columns)
{
// Ask user if they are sure about this
if(QMessageBox::question(this, QApplication::applicationName(),
tr("The content of the clipboard is bigger than the range selected.\nDo you want to insert it anyway?"),
QMessageBox::Yes | QMessageBox::No) != QMessageBox::Yes)
{
// If the user doesn't want to paste the clipboard data anymore, stop now
return;
}
}
// If we get here, we can definitely start pasting: either the ranges match in their size or the user agreed to paste anyway
// Copy the data cell by cell and as-is from the source buffer to the table
int row = firstRow;
for(const QByteArrayList& source_row : *source)
{
int column = firstColumn;
for(const QByteArray& source_cell : source_row)
{
m->setData(m->index(row, column), source_cell);
column++;
if (column > lastColumn)
break;
}
row++;
if (row > lastRow)
break;
}
}
void ExtendedTableWidget::copy(const bool withHeaders)
{
QModelIndexList indices = selectionModel()->selectedIndexes();
// Remove all indices from hidden columns, because if we don't we might copy data from hidden columns as well which is very
// unintuitive; especially copying the rowid column when selecting all columns of a table is a problem because pasting the data
// won't work as expected.
QMutableListIterator<QModelIndex> i(indices);
while (i.hasNext()) {
if (isColumnHidden(i.next().column()))
i.remove();
}
// Abort if there's nothing to copy
if (indices.isEmpty())
return;
SqliteTableModel* m = qobject_cast<SqliteTableModel*>(model());
// Clear internal copy-paste buffer
m_buffer.clear();
// If a single cell is selected, copy it to clipboard
if (!withHeaders && indices.size() == 1) {
QImage img;
QVariant data = m->data(indices.first(), Qt::EditRole);
if (img.loadFromData(data.toByteArray()))
{
// If it's an image, copy the image data to the clipboard
qApp->clipboard()->setImage(img);
return;
} else {
// It it's not an image, check if it's an empty field
if (data.toByteArray().isEmpty())
{
// The field is either NULL or empty. Those are are handled via the internal copy-paste buffer
qApp->clipboard()->setText(QString()); // Calling clear() alone doesn't seem to work on all systems
qApp->clipboard()->clear();
m_buffer.push_back(QByteArrayList{data.toByteArray()});
return;
}
// The field isn't empty. Copy the text to the clipboard without quoting (for general plain text clipboard)
qApp->clipboard()->setText(data.toByteArray());
return;
}
}
// If we got here, there are multiple selected cells, or copy with headers was requested.
// In this case, we copy selected data into internal copy-paste buffer and then
// we write a table both in HTML and text formats to the system clipboard.
// Copy selected data into internal copy-paste buffer
int last_row = indices.first().row();
QByteArrayList lst;
for(int i=0;i<indices.size();i++)
{
if(indices.at(i).row() != last_row)
{
m_buffer.push_back(lst);
lst.clear();
}
lst << indices.at(i).data(Qt::EditRole).toByteArray();
last_row = indices.at(i).row();
}
m_buffer.push_back(lst);
QString result;
QString htmlResult = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">";
htmlResult.append("<html><head><meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\">");
htmlResult.append("<title></title>");
// The generator-stamp is later used to know whether the data in the system clipboard is still ours.
// In that case we will give precedence to our internal copy buffer.
QString now = QDateTime::currentDateTime().toString("YYYY-MM-DDTHH:mm:ss.zzz");
m_generatorStamp = QString("<meta name=\"generator\" content=\"%1\"><meta name=\"date\" content=\"%2\">").arg(QApplication::applicationName().toHtmlEscaped(), now);
htmlResult.append(m_generatorStamp);
// TODO: is this really needed by Excel, since we use <pre> for multi-line cells?
htmlResult.append("<style type=\"text/css\">br{mso-data-placement:same-cell;}</style></head><body><table>");
int currentRow = indices.first().row();
const QString fieldSepHtml = "</td><td>";
const QString rowSepHtml = "</td></tr><tr><td>";
const QString fieldSepText = "\t";
const QString rowSepText = "\r\n";
// Table headers
if (withHeaders) {
htmlResult.append("<tr><th>");
int firstColumn = indices.front().column();
for(int i = firstColumn; i <= indices.back().column(); i++) {
QByteArray headerText = model()->headerData(i, Qt::Horizontal, Qt::DisplayRole).toByteArray();
if (i != firstColumn) {
result.append(fieldSepText);
htmlResult.append("</th><th>");
}
result.append(escapeCopiedData(headerText));
htmlResult.append(headerText);
}
result.append(rowSepText);
htmlResult.append("</th></tr>");
}
// Table data rows
for(const QModelIndex& index : indices) {
// Separators. For first cell, only opening table row tags must be added for the HTML and nothing for the text version.
if (indices.first() == index)
htmlResult.append("<tr><td>");
else if (index.row() != currentRow) {
result.append(rowSepText);
htmlResult.append(rowSepHtml);
} else {
result.append(fieldSepText);
htmlResult.append(fieldSepHtml);
}
currentRow = index.row();
QImage img;
QVariant data = index.data(Qt::EditRole);
// Table cell data: image? Store it as an embedded image in HTML and as base 64 in text version
if (img.loadFromData(data.toByteArray()))
{
QByteArray ba;
QBuffer buffer(&ba);
buffer.open(QIODevice::WriteOnly);
img.save(&buffer, "PNG");
buffer.close();
QString imageBase64 = ba.toBase64();
htmlResult.append("<img src=\"data:image/png;base64,");
htmlResult.append(imageBase64);
result.append(QString());
htmlResult.append("\" alt=\"Image\">");
} else {
QByteArray text;
if (!m->isBinary(index))
text = data.toByteArray();
// Table cell data: text
if (text.contains('\n') || text.contains('\t'))
htmlResult.append("<pre>" + QString(text).toHtmlEscaped() + "</pre>");
else
htmlResult.append(QString(text).toHtmlEscaped());
result.append(escapeCopiedData(text));
}
}
QMimeData *mimeData = new QMimeData;
mimeData->setHtml(htmlResult + "</td></tr></table></body></html>");
mimeData->setText(result);
qApp->clipboard()->setMimeData(mimeData);
}