{

// Remove trailing line break from the clipboard text. This is necessary because some applications append an extra

// line break to the clipboard contents which we would then interpret as regular data, setting the first field of the

// first row after the paste area to NULL. One problem here is that this breaks for those cases where an empty line at

// the end of the selection is explicitly copied and the originating application doesn't add an extra line break. However,

// there are two reasons for favoring this way: 1) Spreadsheet applications seem to add an extra line break and they are

// probably the main source for pasted data, 2) Having to manually delete on extra field seems to be less problematic than

// having one extra field deleted without any warning.

if(clipboard.endsWith("\n"))

clipboard.chop(1);

if(clipboard.endsWith("\r"))

clipboard.chop(1);

// Make sure there is some data in the clipboard

std::vector<BufferRow> result;

if(clipboard.isEmpty())

return result;

result.push_back(BufferRow());

QRegExp re("(\"(?:[^\t\"]+|\"\"[^\"]*\"\")*)\"|(\t|\r?\n)");

int offset = 0;

int whitespace_offset = 0;

while (offset >= 0) {

QString text;

int pos = re.indexIn(clipboard, offset);

if (pos < 0) {

// insert everything that left

text = clipboard.mid(whitespace_offset);

if(QRegExp("\".*\"").exactMatch(text))

text = text.mid(1, text.length() - 2);

text.replace("\"\"", "\"");

result.back().push_back(text.toUtf8());

break;

}

if (re.pos(2) < 0) {

offset = pos + re.cap(1).length() + 1;

continue;

}

QString ws = re.cap(2);

// if two whitespaces in row - that's an empty cell

if (!(pos - whitespace_offset)) {

result.back().push_back(QByteArray());

} else {

text = clipboard.mid(whitespace_offset, pos - whitespace_offset);

if(QRegExp("\".*\"").exactMatch(text))

text = text.mid(1, text.length() - 2);

text.replace("\"\"", "\"");

result.back().push_back(text.toUtf8());

}

if (ws.endsWith("\n"))

// create new row

result.push_back(BufferRow());

whitespace_offset = offset = pos + ws.length();

}

return result;

{

QModelIndex index = sourceModel()->index(sourceRow, filterKeyColumn(), sourceParent);

const std::string value = index.data(Qt::EditRole).toString().toStdString();

if (!value.empty() && m_uniqueValues.find(value) == m_uniqueValues.end()) {

const_cast<UniqueFilterModel*>(this)->m_uniqueValues.insert(value);

return true;

}

else

return false;

{

QLineEdit* lineedit = dynamic_cast<QLineEdit*>(editor);

// Set the data for the editor

QString data = index.data(Qt::EditRole).toString();

if(!lineedit) {

QComboBox* combo = static_cast<QComboBox*>(editor);

int comboIndex = combo->findText(data);

if (comboIndex >= 0)

// if it is valid, adjust the combobox

combo->setCurrentIndex(comboIndex);

} else {

lineedit->setText(data);

// Put the editor in read only mode if the actual data is larger than the maximum length to avoid accidental truncation of the data

lineedit->setReadOnly(data.size() > lineedit->maxLength());

}

{

// Only apply the data back to the model if the editor is not in read only mode to avoid accidental truncation of the data

QLineEdit* lineedit = dynamic_cast<QLineEdit*>(editor);

if(!lineedit) {

QComboBox* combo = static_cast<QComboBox*>(editor);

model->setData(index, combo->currentData(Qt::EditRole), Qt::EditRole);

} else

if(!lineedit->isReadOnly())

model->setData(index, lineedit->text());

QTableView(parent)

{

setHorizontalScrollMode(ExtendedTableWidget::ScrollPerPixel);

// Force ScrollPerItem, so scrolling shows all table rows

setVerticalScrollMode(ExtendedTableWidget::ScrollPerItem);

connect(verticalScrollBar(), &QScrollBar::valueChanged, this, &ExtendedTableWidget::vscrollbarChanged);

connect(this, &ExtendedTableWidget::clicked, this, &ExtendedTableWidget::cellClicked);

// Set up filter row

m_tableHeader = new FilterTableHeader(this);

setHorizontalHeader(m_tableHeader);

// Set up vertical header context menu

verticalHeader()->setContextMenuPolicy(Qt::CustomContextMenu);

// Set up table view context menu

m_contextMenu = new QMenu(this);

QAction* filterAction = new QAction(QIcon(":/icons/filter"), tr("Use as Exact Filter"), m_contextMenu);

QAction* containingAction = new QAction(tr("Containing"), m_contextMenu);

QAction* notContainingAction = new QAction(tr("Not containing"), m_contextMenu);

QAction* notEqualToAction = new QAction(tr("Not equal to"), m_contextMenu);

QAction* greaterThanAction = new QAction(tr("Greater than"), m_contextMenu);

QAction* lessThanAction = new QAction(tr("Less than"), m_contextMenu);

QAction* greaterEqualAction = new QAction(tr("Greater or equal"), m_contextMenu);

QAction* lessEqualAction = new QAction(tr("Less or equal"), m_contextMenu);

QAction* inRangeAction = new QAction(tr("Between this and..."), m_contextMenu);

QAction* regexpAction = new QAction(tr("Regular expression"), m_contextMenu);

QAction* condFormatAction = new QAction(QIcon(":/icons/edit_cond_formats"), tr("Edit Conditional Formats..."), m_contextMenu);

QAction* nullAction = new QAction(QIcon(":/icons/set_to_null"), tr("Set to NULL"), m_contextMenu);

QAction* copyAction = new QAction(QIcon(":/icons/copy"), tr("Copy"), m_contextMenu);

QAction* copyWithHeadersAction = new QAction(QIcon(":/icons/special_copy"), tr("Copy with Headers"), m_contextMenu);

QAction* copyAsSQLAction = new QAction(QIcon(":/icons/sql_copy"), tr("Copy as SQL"), m_contextMenu);

QAction* pasteAction = new QAction(QIcon(":/icons/paste"), tr("Paste"), m_contextMenu);

QAction* printAction = new QAction(QIcon(":/icons/print"), tr("Print..."), m_contextMenu);

m_contextMenu->addAction(filterAction);

QMenu* filterMenu = m_contextMenu->addMenu(tr("Use in Filter Expression"));

filterMenu->addAction(containingAction);

filterMenu->addAction(notContainingAction);

filterMenu->addAction(notEqualToAction);

filterMenu->addAction(greaterThanAction);

filterMenu->addAction(lessThanAction);

filterMenu->addAction(greaterEqualAction);

filterMenu->addAction(lessEqualAction);

filterMenu->addAction(inRangeAction);

filterMenu->addAction(regexpAction);

m_contextMenu->addAction(condFormatAction);

m_contextMenu->addSeparator();

m_contextMenu->addAction(nullAction);

m_contextMenu->addSeparator();

m_contextMenu->addAction(copyAction);

m_contextMenu->addAction(copyWithHeadersAction);

m_contextMenu->addAction(copyAsSQLAction);

m_contextMenu->addAction(pasteAction);

m_contextMenu->addSeparator();

m_contextMenu->addAction(printAction);

setContextMenuPolicy(Qt::CustomContextMenu);

// Create and set up delegate

m_editorDelegate = new ExtendedTableWidgetEditorDelegate(this);

setItemDelegate(m_editorDelegate);

// This is only for displaying the shortcut in the context menu.

// An entry in keyPressEvent is still needed.

nullAction->setShortcut(QKeySequence(tr("Alt+Del")));

copyAction->setShortcut(QKeySequence::Copy);

copyWithHeadersAction->setShortcut(QKeySequence(tr("Ctrl+Shift+C")));

copyAsSQLAction->setShortcut(QKeySequence(tr("Ctrl+Alt+C")));

pasteAction->setShortcut(QKeySequence::Paste);

printAction->setShortcut(QKeySequence::Print);

// Set up context menu actions

connect(this, &QTableView::customContextMenuRequested,

[=](const QPoint& pos)

{

// Deactivate context menu options if there is no model set

bool enabled = model();

filterAction->setEnabled(enabled);

filterMenu->setEnabled(enabled);

copyAction->setEnabled(enabled);

copyWithHeadersAction->setEnabled(enabled);

copyAsSQLAction->setEnabled(enabled);

printAction->setEnabled(enabled);

condFormatAction->setEnabled(enabled);

// Hide filter actions when there isn't any filters

bool hasFilters = m_tableHeader->hasFilters();

filterAction->setVisible(hasFilters);

filterMenu->menuAction()->setVisible(hasFilters);

condFormatAction->setVisible(hasFilters);

// Try to find out whether the current view is editable and (de)activate menu options according to that

bool editable = editTriggers() != QAbstractItemView::NoEditTriggers;

nullAction->setEnabled(enabled && editable);

pasteAction->setEnabled(enabled && editable);

// Show menu

m_contextMenu->popup(viewport()->mapToGlobal(pos));

});

connect(filterAction, &QAction::triggered, [&]() {

useAsFilter(QString ("="));

});

connect(containingAction, &QAction::triggered, [&]() {

useAsFilter(QString (""));

});

// Use a regular expression for the not containing filter. Simplify this if we ever support the NOT LIKE filter.

connect(notContainingAction, &QAction::triggered, [&]() {

useAsFilter(QString ("/^((?!"), /* binary */ false, QString (").)*$/"));

});

connect(notEqualToAction, &QAction::triggered, [&]() {

useAsFilter(QString ("<>"));

});

connect(greaterThanAction, &QAction::triggered, [&]() {

useAsFilter(QString (">"));

});

connect(lessThanAction, &QAction::triggered, [&]() {

useAsFilter(QString ("<"));

});

connect(greaterEqualAction, &QAction::triggered, [&]() {

useAsFilter(QString (">="));

});

connect(lessEqualAction, &QAction::triggered, [&]() {

useAsFilter(QString ("<="));

});

connect(inRangeAction, &QAction::triggered, [&]() {

useAsFilter(QString ("~"), /* binary */ true);

});

connect(regexpAction, &QAction::triggered, [&]() {

useAsFilter(QString ("/"), /* binary */ false, QString ("/"));

});

connect(condFormatAction, &QAction::triggered, [&]() {

emit editCondFormats(currentIndex().column());

});

connect(nullAction, &QAction::triggered, [&]() {

for(const QModelIndex& index : selectedIndexes())

model()->setData(index, QVariant());

});

connect(copyAction, &QAction::triggered, [&]() {

copy(false, false);

});

connect(copyWithHeadersAction, &QAction::triggered, [&]() {

copy(true, false);

});

connect(copyAsSQLAction, &QAction::triggered, [&]() {

copy(false, true);

});

connect(pasteAction, &QAction::triggered, [&]() {

paste();

});

connect(printAction, &QAction::triggered, [&]() {

openPrintDialog();

});

#if QT_VERSION >= QT_VERSION_CHECK(5, 12, 0) && QT_VERSION < QT_VERSION_CHECK(5, 12, 3)

// This work arounds QTBUG-73721 and it is applied only for the affected version range.

setWordWrap(false);

#endif

{

// Set the new font and font size

QFont dataBrowserFont(Settings::getValue("databrowser", "font").toString());

dataBrowserFont.setPointSize(Settings::getValue("databrowser", "fontsize").toInt());

setFont(dataBrowserFont);

// Set new default row height depending on the font size

verticalHeader()->setDefaultSectionSize(verticalHeader()->fontMetrics().height()+10);

{

QModelIndexList indices = fromIndices;

// 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> it(indices);

while (it.hasNext()) {

if (isColumnHidden(it.next().column()))

it.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 which contains an image, copy it to the clipboard

if (!inSQL && !withHeaders && indices.size() == 1) {

QImage img;

QVariant varData = m->data(indices.first(), Qt::EditRole);

if (img.loadFromData(varData.toByteArray()))

{

// If it's an image, copy the image data to the clipboard

mimeData->setImageData(img);

return;

}

}

// If we got here, a non-image cell was or multiple cells were selected, 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();

BufferRow lst;

for(int i=0;i<indices.size();i++)

{

if(indices.at(i).row() != last_row)

{

m_buffer.push_back(lst);

lst.clear();

}

lst.push_back(indices.at(i).data(Qt::EditRole).toByteArray());

last_row = indices.at(i).row();

}

m_buffer.push_back(lst);

QString sqlResult;

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 border=1 cellspacing=0 cellpadding=2>");

int currentRow = indices.first().row();

const QString fieldSepHtml = "</td><td>";

const QString rowSepHtml = "</td></tr><tr><td>";

const QString fieldSepText = "\t";

#ifdef Q_OS_WIN

const QString rowSepText = "\r\n";

#else

const QString rowSepText = "\n";

#endif

QString sqlInsertStatement = QString("INSERT INTO %1 (").arg(QString::fromStdString(m->currentTableName().toString()));

// Table headers

if (withHeaders || inSQL) {

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::EditRole).toByteArray();

if (i != firstColumn) {

result.append(fieldSepText);

htmlResult.append("</th><th>");

sqlInsertStatement.append(", ");

}

result.append(headerText);

htmlResult.append(headerText);

sqlInsertStatement.append(sqlb::escapeIdentifier(headerText));

}

result.append(rowSepText);

htmlResult.append("</th></tr>");

sqlInsertStatement.append(") VALUES (");

}

// 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>");

sqlResult.append(sqlInsertStatement);

} else if (index.row() != currentRow) {

result.append(rowSepText);

htmlResult.append(rowSepHtml);

sqlResult.append(");" + rowSepText + sqlInsertStatement);

} else {

result.append(fieldSepText);

htmlResult.append(fieldSepHtml);

sqlResult.append(", ");

}

currentRow = index.row();

QImage img;

QVariant bArrdata = index.data(Qt::EditRole);

// Table cell data: image? Store it as an embedded image in HTML

if (!inSQL && img.loadFromData(bArrdata.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 = bArrdata.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(text);

sqlResult.append("'" + text.replace("'", "''") + "'");

} else

// Table cell data: binary. Save as BLOB literal in SQL

sqlResult.append( "X'" + bArrdata.toByteArray().toHex() + "'" );

}

}

sqlResult.append(");");

if ( inSQL )

{

mimeData->setText(sqlResult);

} else {

mimeData->setHtml(htmlResult + "</td></tr></table></body></html>");

mimeData->setText(result);

}

{

QMimeData *mimeData = new QMimeData;

copyMimeData(selectionModel()->selectedIndexes(), mimeData, withHeaders, inSQL);

qApp->clipboard()->setMimeData(mimeData);

{

// 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).

std::vector<BufferRow> clipboardTable;

std::vector<BufferRow>* source;

if(mimeClipboard->hasHtml() && mimeClipboard->html().contains(m_generatorStamp) && !m_buffer.empty())

{

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 = static_cast<int>(source->size());

int columns = static_cast<int>(source->front().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 bArrdata = source->front().front();

for(int row=firstRow;row<firstRow+selectedRows;row++)

{

for(int column=firstColumn;column<firstColumn+selectedColumns;column++)

m->setData(m->index(row, column), bArrdata);

}

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 auto& 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;

}

{

QModelIndex index = selectionModel()->currentIndex();

SqliteTableModel* m = qobject_cast<SqliteTableModel*>(model());

// Abort if there's nothing to filter

if (!index.isValid() || !selectionModel()->hasSelection() || m->isBinary(index))

return;

QVariant bArrdata = model()->data(index, Qt::EditRole);

QString value;

if (bArrdata.isNull())

value = "NULL";

else if (bArrdata.toString().isEmpty())

value = "''";

else

value = bArrdata.toString();

// When Containing filter is requested (empty operator) and the value starts with

// an operator character, the character is escaped.

if (filterOperator.isEmpty())

value.replace(QRegExp("^(<|>|=|/)"), Settings::getValue("databrowser", "filter_escape").toString() + QString("\\1"));

// If binary operator, the cell data is used as first value and

// the second value must be added by the user.

size_t column = static_cast<size_t>(index.column());

if (binary)

m_tableHeader->setFilter(column, value + filterOperator);

else

m_tableHeader->setFilter(column, filterOperator + value + operatorSuffix);

{

const QModelIndex& currentIndex = selectionModel()->currentIndex();

QModelIndex upperIndex = currentIndex.sibling(currentIndex.row() - 1, currentIndex.column());

if (upperIndex.isValid()) {

SqliteTableModel* m = qobject_cast<SqliteTableModel*>(model());

// When the data is binary, just copy it, since it cannot be edited inline.

if (m->isBinary(upperIndex))

m->setData(currentIndex, m->data(upperIndex, Qt::EditRole), Qt::EditRole);

else {

// Open the inline editor and set the value (this mimics the behaviour of LibreOffice Calc)

edit(currentIndex);

QLineEdit* editor = qobject_cast<QLineEdit*>(indexWidget(currentIndex));

editor->setText(upperIndex.data().toString());

}

}

{

// Call a custom copy method when Ctrl-C is pressed

if(event->matches(QKeySequence::Copy))

{

copy(false, false);

return;

} else if(event->matches(QKeySequence::Paste)) {

// Call a custom paste method when Ctrl-V is pressed

paste();

} else if(event->matches(QKeySequence::Print)) {

openPrintDialog();

} else if(event->modifiers().testFlag(Qt::ControlModifier) && event->modifiers().testFlag(Qt::ShiftModifier) && (event->key() == Qt::Key_C)) {

// Call copy with headers when Ctrl-Shift-C is pressed

copy(true, false);

} else if(event->modifiers().testFlag(Qt::ControlModifier) && event->modifiers().testFlag(Qt::AltModifier) && (event->key() == Qt::Key_C)) {

// Call copy in SQL format when Ctrl-Alt-C is pressed

copy(false, true);

} else if(event->modifiers().testFlag(Qt::ControlModifier) && (event->key() == Qt::Key_Apostrophe)) {

// Call duplicateUpperCell when Ctrl-' is pressed (this is used by spreadsheets for "Copy Formula from Cell Above")

duplicateUpperCell();

} else if(event->key() == Qt::Key_Tab && hasFocus() &&

selectedIndexes().count() == 1 &&

selectedIndexes().at(0).row() == model()->rowCount()-1 && selectedIndexes().at(0).column() == model()->columnCount()-1) {

// If the Tab key was pressed while the focus was on the last cell of the last row insert a new row automatically

model()->insertRow(model()->rowCount());

} else if ((event->key() == Qt::Key_Delete) || (event->key() == Qt::Key_Backspace)) {

// Check if entire rows are selected. We call the selectedRows() method here not only for simplicity reasons but also because it distinguishes between

// "an entire row is selected" and "all cells of a row are selected", the former is e.g. the case when the row number is clicked, the latter when all cells

// are selected manually. This is an important distinction (especially when a table has only one column!) to match the users' expectations. Also never

// delete records when the backspace key was pressed.

if(event->key() == Qt::Key_Delete && selectionModel()->selectedRows().size())

{

// At least on entire row is selected. Because we don't allow completely arbitrary selections (at least at the moment) but only block selections,

// this means that only entire entire rows are selected. If an entire row is (or multiple entire rows are) selected, we delete that record instead

// of deleting only the cell contents.

emit selectedRowsToBeDeleted();

} else {

// No entire row is selected. So just set the selected cells to null or empty string depending on the modifier keys

if(event->modifiers().testFlag(Qt::AltModifier))

{

// When pressing Alt+Delete set the value to NULL

for(const QModelIndex& index : selectedIndexes())

model()->setData(index, QVariant());

} else {

// When pressing Delete only set the value to empty string

for(const QModelIndex& index : selectedIndexes())

model()->setData(index, "");

}

}

} else if(event->modifiers().testFlag(Qt::ControlModifier) && (event->key() == Qt::Key_PageUp || event->key() == Qt::Key_PageDown)) {

// When pressing Ctrl + Page up/down send a signal indicating the user wants to change the current table

emit switchTable(event->key() == Qt::Key_PageDown);

return;

}

// This prevents the current selection from being changed when pressing tab to move to the next filter. Note that this is in an 'if' condition,

// not in an 'else if' because this way, when the tab key was pressed and the focus was on the last cell, a new row is inserted and then the tab

// key press is processed a second time to move the cursor as well

if((event->key() != Qt::Key_Tab && event->key() != Qt::Key_Backtab) || hasFocus())

QTableView::keyPressEvent(event);

{

// Call the parent implementation first - it does most of the actual logic

QTableView::updateGeometries();

// Check if a model has already been set yet

if(model())

{

// If so and if it is a SqliteTableModel and if the parent implementation of this method decided that a scrollbar is needed, update its maximum value

SqliteTableModel* m = qobject_cast<SqliteTableModel*>(model());

if(m && verticalScrollBar()->maximum())

verticalScrollBar()->setMaximum(m->rowCount() - numVisibleRows() + 1);

}

{

// Cancel if there is no model set yet - this shouldn't happen (because without a model there should be no scrollbar) but just to be sure...

if(!model())

return;

// Fetch more data from the DB if necessary

const auto nrows = model()->rowCount();

if(nrows == 0)

return;

if(auto * m = dynamic_cast<SqliteTableModel*>(model()))

{

int row_begin = std::min(value, nrows - 1);

int row_end = std::min(value + numVisibleRows(), nrows);

m->triggerCacheLoad(row_begin, row_end);

}

{

// Get the row numbers of the rows currently visible at the top and the bottom of the widget

int row_top = rowAt(0) == -1 ? 0 : rowAt(0);

int row_bottom = rowAt(height()) == -1 ? model()->rowCount() : rowAt(height());

// Calculate the number of visible rows

return row_bottom - row_top;

{

std::unordered_set<int> selectedCols;

for(const QModelIndex & idx : selectedIndexes())

selectedCols.insert(idx.column());

return selectedCols;

{

// If Ctrl-Shift is pressed try to jump to the row referenced by the foreign key of the clicked cell

if(qApp->keyboardModifiers().testFlag(Qt::ControlModifier) && qApp->keyboardModifiers().testFlag(Qt::ShiftModifier) && model())

{

SqliteTableModel* m = qobject_cast<SqliteTableModel*>(model());

sqlb::ForeignKeyClause fk = m->getForeignKeyClause(index.column()-1);

if(fk.isSet())

emit foreignKeyClicked(sqlb::ObjectIdentifier(m->currentTableName().schema(), fk.table()),

fk.columns().size() ? QString::fromStdString(fk.columns().at(0)) : "",

m->data(index, Qt::EditRole).toByteArray());

}

{

QModelIndex index = indexAt(event->pos());

if (!index.isValid())

{

if (event->mimeData()->hasUrls() && event->mimeData()->urls().first().isLocalFile())

emit openFileFromDropEvent(event->mimeData()->urls().first().toLocalFile());

return;

}

model()->dropMimeData(event->mimeData(), Qt::CopyAction, index.row(), index.column(), QModelIndex());

event->acceptProposedAction();

{

SqliteTableModel* m = qobject_cast<SqliteTableModel*>(model());

// Are there even that many lines?

if(lineToSelect >= m->rowCount())

return;

QApplication::setOverrideCursor( Qt::WaitCursor );

m->triggerCacheLoad(lineToSelect);

// Select it

clearSelection();

selectRow(lineToSelect);

scrollTo(currentIndex(), QAbstractItemView::PositionAtTop);

QApplication::restoreOverrideCursor();

{

SqliteTableModel* m = qobject_cast<SqliteTableModel*>(model());

int lastLine = firstLine+count-1;

// Are there even that many lines?

if(lastLine >= m->rowCount())

return;

selectTableLine(firstLine);

QModelIndex topLeft = m->index(firstLine, 0);

QModelIndex bottomRight = m->index(lastLine, m->columnCount()-1);

selectionModel()->select(QItemSelection(topLeft, bottomRight), QItemSelectionModel::Select | QItemSelectionModel::Rows);

{

SqliteTableModel* m = qobject_cast<SqliteTableModel*>(model());

// Fetch all the data if needed and user accepts, then call parent's selectAll()

QMessageBox::StandardButton answer = QMessageBox::Yes;

// If we can fetch more data, ask user if they are sure about it.

if (!m->isCacheComplete()) {

answer = QMessageBox::question(this, QApplication::applicationName(),

tr("<p>Not all data has been loaded. <b>Do you want to load all data before selecting all the rows?</b><p>"

"<p>Answering <b>No</b> means that no more data will be loaded and the selection will not be performed.<br/>"

"Answering <b>Yes</b> might take some time while the data is loaded but the selection will be complete.</p>"

"Warning: Loading all the data might require a great amount of memory for big tables."),

QMessageBox::Yes | QMessageBox::No);

if (answer == QMessageBox::Yes)

m->completeCache();

}

if (answer == QMessageBox::Yes)

QTableView::selectAll();

{

QMimeData *mimeData = new QMimeData;

QModelIndexList indices;

// Print the selection, if active, or the entire table otherwise.

// Given that simply clicking over a cell, selects it, one-cell selections are ignored.

if (selectionModel()->hasSelection() && selectionModel()->selectedIndexes().count() > 1)

indices = selectionModel()->selectedIndexes();

else

for (int row=0; row < model()->rowCount(); row++)

for (int column=0; column < model()->columnCount(); column++)

indices << model()->index(row, column);

// Copy the specified indices content to mimeData for getting the HTML representation of

// the table with headers. We can then print it using an HTML text document.

copyMimeData(indices, mimeData, true, false);

QTextDocument *document = new QTextDocument();

document->setHtml(mimeData->html());

QPrinter printer;

QPrintPreviewDialog *dialog = new QPrintPreviewDialog(&printer);

connect(dialog, &QPrintPreviewDialog::paintRequested, [&](QPrinter *previewPrinter) {

document->print(previewPrinter);

});

dialog->exec();

delete dialog;

delete document;

delete mimeData;

{

// Are there even any columns to sort by?

if(columns.size() == 0)

return;

// Are we using a SqliteTableModel as a model? These support multiple sort columns. Other models might not; for those we just use the first sort column

SqliteTableModel* sqlite_model = dynamic_cast<SqliteTableModel*>(model());

if(sqlite_model == nullptr)

model()->sort(static_cast<int>(columns.front().column), columns.front().direction == sqlb::Ascending ? Qt::AscendingOrder : Qt::DescendingOrder);

else

sqlite_model->sort(columns);