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372 lines (314 loc) · 12.7 KB
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#include "AddRecordDialog.h"
#include "ui_AddRecordDialog.h"
#include "sqlitedb.h"
#include "Settings.h"
#include <QMessageBox>
#include <QPushButton>
#include <QKeyEvent>
#include <QStyledItemDelegate>
#include <QWhatsThis>
#include <QLineEdit>
#include <QMenu>
namespace {
class NullLineEdit: public QLineEdit {
Q_OBJECT
private:
bool m_isNull;
public:
explicit NullLineEdit(QWidget* parent=nullptr): QLineEdit(parent), m_isNull (true) {}
bool isNull() {return m_isNull;}
void setNull(bool value) {
if (value) {
clear();
setStyleSheet("QLineEdit{ font-style: italic; }");
setPlaceholderText(Settings::getValue("databrowser", "null_text").toString());
setModified(false);
} else {
setStyleSheet("");
setPlaceholderText("");
}
m_isNull = value;
}
protected:
void contextMenuEvent(QContextMenuEvent *event) override
{
QMenu* editContextMenu = createStandardContextMenu();
QAction* nullAction = new QAction(QIcon(":/icons/set_to_null"), tr("Set to NULL"), editContextMenu);
connect(nullAction, &QAction::triggered, nullAction, [&]() {
setNull(true);
});
nullAction->setShortcut(QKeySequence(tr("Alt+Del")));
editContextMenu->addSeparator();
editContextMenu->addAction(nullAction);
editContextMenu->exec(event->globalPos());
delete editContextMenu;
}
void keyPressEvent(QKeyEvent *evt) override
{
// Alt+Del sets field to NULL
if((evt->modifiers() & Qt::AltModifier) && (evt->key() == Qt::Key_Delete))
setNull(true);
else {
// Remove any possible NULL mark when user starts typing
setStyleSheet("");
setPlaceholderText("");
QLineEdit::keyPressEvent(evt);
}
}
};
// Styled Item Delegate for non-editable columns (all except Value)
class NoEditDelegate: public QStyledItemDelegate {
public:
explicit NoEditDelegate(QObject* parent=nullptr): QStyledItemDelegate(parent) {}
QWidget* createEditor(QWidget* /* parent */, const QStyleOptionViewItem& /* option */, const QModelIndex& /* index */) const override {
return nullptr;
}
};
// Styled Item Delegate for editable columns (Value)
class EditDelegate: public QStyledItemDelegate {
public:
explicit EditDelegate(QObject* parent=nullptr): QStyledItemDelegate(parent) {}
QWidget* createEditor(QWidget *parent, const QStyleOptionViewItem& /* option */, const QModelIndex& /* index */) const override {
return new NullLineEdit(parent);
}
void setEditorData(QWidget *editor, const QModelIndex &index) const override {
NullLineEdit* lineEditor = static_cast<NullLineEdit*>(editor);
// Set the editor in the null state (unless the user has actually written NULL)
if (index.model()->data(index, Qt::UserRole).isNull() &&
index.model()->data(index, Qt::DisplayRole) == Settings::getValue("databrowser", "null_text"))
lineEditor->setNull(true);
else {
QStyledItemDelegate::setEditorData(editor, index);
lineEditor->setNull(false);
}
}
void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const override {
NullLineEdit* lineEditor = static_cast<NullLineEdit*>(editor);
// Restore NULL text (unless the user has already modified the value)
if (lineEditor->isNull() && !lineEditor->isModified()) {
model->setData(index, Settings::getValue("databrowser", "null_text"), Qt::DisplayRole);
model->setData(index, QVariant(), Qt::UserRole);
} else {
// Get isModified flag before calling setModelData
bool modified = lineEditor->isModified();
QStyledItemDelegate::setModelData(editor, model, index);
// Copy the just edited data to the user role, so it can be later used in the SQL insert statement.
if (modified) {
lineEditor->setNull(false);
model->setData(index, model->data(index, Qt::EditRole), Qt::UserRole);
}
}
}
};
}
AddRecordDialog::AddRecordDialog(DBBrowserDB& db, const sqlb::ObjectIdentifier& tableName, QWidget* parent, const std::vector<std::string>& _pseudo_pk)
: QDialog(parent),
ui(new Ui::AddRecordDialog),
pdb(db),
curTable(tableName),
pseudo_pk(_pseudo_pk)
{
// Create UI
ui->setupUi(this);
connect(ui->treeWidget, &QTreeWidget::itemChanged, this, &AddRecordDialog::itemChanged);
populateFields();
ui->sqlTextEdit->setReadOnly(true);
// Update UI
ui->treeWidget->resizeColumnToContents(kName);
ui->treeWidget->resizeColumnToContents(kType);
ui->treeWidget->setFrameShape(QFrame::Box);
}
AddRecordDialog::~AddRecordDialog()
{
delete ui;
}
void AddRecordDialog::keyPressEvent(QKeyEvent *evt)
{
if((evt->modifiers() & Qt::ControlModifier)
&& (evt->key() == Qt::Key_Enter || evt->key() == Qt::Key_Return))
{
accept();
return;
}
if(evt->key() == Qt::Key_Enter || evt->key() == Qt::Key_Return)
return;
QDialog::keyPressEvent(evt);
}
void AddRecordDialog::setDefaultsStyle(QTreeWidgetItem* item)
{
// Default values are displayed with the style configured for NULL values in the Data Browser.
QFont font;
font.setItalic(true);
item->setData(kValue, Qt::FontRole, font);
item->setData(kValue, Qt::BackgroundRole, QColor(Settings::getValue("databrowser", "null_bg_colour").toString()));
item->setData(kValue, Qt::ForegroundRole, QColor(Settings::getValue("databrowser", "null_fg_colour").toString()));
}
void AddRecordDialog::populateFields()
{
// Block the itemChanged signal or the SQL text will be updated while filling the treewidget.
ui->treeWidget->blockSignals(true);
ui->treeWidget->clear();
// Allow all Edit Triggers, but they will only apply to the columns with
// editors (Value)
ui->treeWidget->setEditTriggers(QAbstractItemView::AllEditTriggers);
// Disallow edition of columns except Value
ui->treeWidget->setItemDelegateForColumn(kName, new NoEditDelegate(this));
ui->treeWidget->setItemDelegateForColumn(kType, new NoEditDelegate(this));
ui->treeWidget->setItemDelegateForColumn(kValue, new EditDelegate(this));
sqlb::FieldVector fields;
std::vector<std::shared_ptr<sqlb::ForeignKeyClause>> fks;
sqlb::IndexedColumnVector pk;
bool auto_increment = false;
// Initialize fields, fks and pk differently depending on whether it's a table or a view.
const sqlb::TablePtr table = pdb.getTableByName(curTable);
fields = table->fields;
if (!table->isView())
{
std::transform(fields.begin(), fields.end(), std::back_inserter(fks), [table](const auto& f) {
return table->foreignKey({f.name()});
});
const auto pk_constraint = table->primaryKey();
if(pk_constraint)
{
pk = table->primaryKeyColumns();
auto_increment = pk_constraint->autoIncrement();
}
} else {
// It's a view
fks.resize(fields.size(), nullptr);
std::transform(pseudo_pk.begin(), pseudo_pk.end(), std::back_inserter(pk), [](const auto& e) { return sqlb::IndexedColumn(e, false); });
}
for(uint i = 0; i < fields.size(); i++)
{
const sqlb::Field& f = fields[i];
QTreeWidgetItem *tbitem = new QTreeWidgetItem(ui->treeWidget);
tbitem->setFlags(Qt::ItemIsEnabled | Qt::ItemIsEditable);
tbitem->setText(kName, QString::fromStdString(f.name()));
tbitem->setText(kType, QString::fromStdString(f.type()));
tbitem->setData(kType, Qt::UserRole, f.affinity());
// NOT NULL fields are indicated in bold.
if (f.notnull()) {
QFont font;
font.setBold(true);
tbitem->setData(kName, Qt::FontRole, font);
}
if (contains(pk, f.name()))
tbitem->setIcon(kName, QIcon(":/icons/field_key"));
else if (fks[i])
tbitem->setIcon(kName, QIcon(":/icons/field_fk"));
else
tbitem->setIcon(kName, QIcon(":/icons/field"));
QString toolTip;
if (auto_increment && contains(pk, f.name()))
toolTip.append(tr("Auto-increment\n"));
if (f.unique())
toolTip.append(tr("Unique constraint\n"));
if (!f.check().empty())
toolTip.append(tr("Check constraint:\t %1\n").arg(QString::fromStdString(f.check())));
auto fk = fks[i];
if(fk)
toolTip.append(tr("Foreign key:\t %1\n").arg(QString::fromStdString(fk->toString())));
setDefaultsStyle(tbitem);
// Display Role is used for displaying the default values.
// Only when they are changed, the User Role is updated and then used in the INSERT query.
if (!f.defaultValue().empty()) {
QString defaultValue = QString::fromStdString(f.defaultValue());
tbitem->setData(kValue, Qt::DisplayRole, defaultValue);
toolTip.append(tr("Default value:\t %1\n").arg(defaultValue));
} else
tbitem->setData(kValue, Qt::DisplayRole, Settings::getValue("databrowser", "null_text"));
if (!toolTip.isEmpty()) {
// Chop last end-of-line
toolTip.chop(1);
tbitem->setToolTip(kValue, toolTip);
tbitem->setToolTip(kType, toolTip);
}
}
updateSqlText();
// Enable signals from tree widget
ui->treeWidget->blockSignals(false);
}
void AddRecordDialog::accept()
{
if(!pdb.executeSQL(ui->sqlTextEdit->text().toStdString()))
{
QMessageBox::warning(
this,
QApplication::applicationName(),
tr("Error adding record. Message from database engine:\n\n%1").arg(pdb.lastError()));
return;
}
QDialog::accept();
}
void AddRecordDialog::updateSqlText()
{
QString stmt = QString("INSERT INTO %1").arg(QString::fromStdString(curTable.toString()));
QStringList vals;
QStringList fields;
// If the User Role of the Value column is not null, the entered value is used
// in the INSERT statement. Otherwise, SQLite just uses the default value for the field.
for(int i = 0; i < ui->treeWidget->topLevelItemCount(); ++i)
{
QTreeWidgetItem *item = ui->treeWidget->topLevelItem(i);
// User role contains now values entered by the user, that we actually need to insert.
QVariant value = item->data(kValue, Qt::UserRole);
if (!value.isNull()) {
bool isNumeric;
fields << sqlb::escapeIdentifier(item->text(kName));
value.toDouble(&isNumeric);
// If it has a numeric format and has no text affinity, do not quote it.
if (isNumeric && item->data(kType, Qt::UserRole).toInt() != sqlb::Field::TextAffinity)
vals << value.toString();
else
vals << sqlb::escapeString(value.toString());
}
}
if(fields.empty())
{
stmt.append(" DEFAULT VALUES;");
} else {
stmt.append("\n(");
stmt.append(fields.join(", "));
stmt.append(")\nVALUES (");
stmt.append(vals.join(", "));
stmt.append(");");
}
ui->sqlTextEdit->setText(stmt);
}
void AddRecordDialog::itemChanged(QTreeWidgetItem *item, int column)
{
if (item->data(column, Qt::UserRole).isNull())
setDefaultsStyle(item);
else {
// Restore default fore/background for the value column,
// since the value has changed away from the default.
QFont font;
font.setItalic(false);
item->setData(column, Qt::FontRole, font);
item->setData(column, Qt::BackgroundRole, item->data(kName, Qt::BackgroundRole));
item->setData(column, Qt::ForegroundRole, item->data(kName, Qt::ForegroundRole));
}
updateSqlText();
}
void AddRecordDialog::help()
{
QWhatsThis::enterWhatsThisMode();
}
void AddRecordDialog::buttonBoxClicked(QAbstractButton* button)
{
if (button == ui->buttonBox->button(QDialogButtonBox::Cancel))
reject();
else if (button == ui->buttonBox->button(QDialogButtonBox::Save))
accept();
else if (button == ui->buttonBox->button(QDialogButtonBox::Help))
help();
else if (button == ui->buttonBox->button(QDialogButtonBox::RestoreDefaults)) {
if (QMessageBox::warning(this,
QApplication::applicationName(),
tr("Are you sure you want to restore all the entered values to their defaults?"),
QMessageBox::RestoreDefaults | QMessageBox::Cancel,
QMessageBox::Cancel) == QMessageBox::RestoreDefaults)
populateFields();
}
}
#include "AddRecordDialog.moc"