#include "EditTableDialog.h"

#include "Settings.h"

#include "ForeignKeyEditorDelegate.h"

#include "ui_EditTableDialog.h"

#include "sqlitetablemodel.h"

#include "sqlitedb.h"

#include <QMessageBox>

#include <QPushButton>

#include <QComboBox>

#include <QDateTime>

#include <QKeyEvent>

#include <algorithm>

EditTableDialog::EditTableDialog(DBBrowserDB& db, const sqlb::ObjectIdentifier& tableName, bool createTable, QWidget* parent)

: QDialog(parent),

ui(new Ui::EditTableDialog),

pdb(db),

curTable(tableName),

m_table(tableName.name()),

m_bNewTable(createTable),

m_sRestorePointName(pdb.generateSavepointName("edittable"))

{

// Create UI

ui->setupUi(this);

ui->widgetExtension->setVisible(false);

connect(ui->treeWidget, SIGNAL(itemChanged(QTreeWidgetItem*,int)),this,SLOT(itemChanged(QTreeWidgetItem*,int)));

// TODO Remove this one we have added support for these buttons

ui->buttonAddConstraint->setVisible(false);

ui->buttonRemoveConstraint->setVisible(false);

// Set item delegate for foreign key column

m_fkEditorDelegate = new ForeignKeyEditorDelegate(db, m_table, this);

ui->treeWidget->setItemDelegateForColumn(kForeignKey, m_fkEditorDelegate);

// Editing an existing table?

if(m_bNewTable == false)

{

// Existing table, so load and set the current layout

m_table = *(pdb.getObjectByName<sqlb::Table>(curTable));

ui->labelEditWarning->setVisible(!m_table.fullyParsed());

// Initialise the list of tracked columns for table layout changes

for(const auto& field : m_table.fields)

trackColumns[QString::fromStdString(field.name())] = QString::fromStdString(field.name());

// Set without rowid checkbox and schema dropdown. No need to trigger any events here as we're only loading a table exactly as it is stored by SQLite, so no need

// for error checking etc.

ui->checkWithoutRowid->blockSignals(true);

ui->checkWithoutRowid->setChecked(m_table.withoutRowidTable());

ui->checkWithoutRowid->blockSignals(false);

ui->comboSchema->blockSignals(true);

for(const auto& n : pdb.schemata) // Load list of database schemata

ui->comboSchema->addItem(QString::fromStdString(n.first));

ui->comboSchema->setCurrentText(QString::fromStdString(curTable.schema()));

ui->comboSchema->blockSignals(false);

populateFields();

populateConstraints();

} else {

for(const auto& n : pdb.schemata) // Load list of database schemata

ui->comboSchema->addItem(QString::fromStdString(n.first));

ui->comboSchema->setCurrentText("main"); // Always create tables in the main schema by default

ui->labelEditWarning->setVisible(false);

}

// And create a savepoint

pdb.setSavepoint(m_sRestorePointName);

// Update UI

ui->editTableName->setText(QString::fromStdString(curTable.name()));

updateColumnWidth();

checkInput();

}

EditTableDialog::~EditTableDialog()

{

delete ui;

}

void EditTableDialog::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 EditTableDialog::updateColumnWidth()

{

ui->treeWidget->setColumnWidth(kName, 190);

ui->treeWidget->setColumnWidth(kType, 100);

ui->treeWidget->setColumnWidth(kNotNull, 30);

ui->treeWidget->setColumnWidth(kPrimaryKey, 30);

ui->treeWidget->setColumnWidth(kAutoIncrement, 30);

ui->treeWidget->setColumnWidth(kUnique, 30);

ui->treeWidget->setColumnWidth(kForeignKey, 500);

ui->tableConstraints->setColumnWidth(kConstraintColumns, 180);

ui->tableConstraints->setColumnWidth(kConstraintType, 130);

ui->tableConstraints->setColumnWidth(kConstraintName, 130);

ui->tableConstraints->setColumnWidth(kConstraintSql, 300);

}

void EditTableDialog::populateFields()

{

// disconnect the itemChanged signal or the table item will

// be updated while filling the treewidget

disconnect(ui->treeWidget, SIGNAL(itemChanged(QTreeWidgetItem*,int)),

this,SLOT(itemChanged(QTreeWidgetItem*,int)));

ui->treeWidget->clear();

const auto& fields = m_table.fields;

sqlb::StringVector pk = m_table.primaryKey();

for(const sqlb::Field& f : fields)

{

QTreeWidgetItem *tbitem = new QTreeWidgetItem(ui->treeWidget);

tbitem->setFlags(tbitem->flags() | Qt::ItemIsEditable);

tbitem->setText(kName, QString::fromStdString(f.name()));

QComboBox* typeBox = new QComboBox(ui->treeWidget);

typeBox->setProperty("column", QString::fromStdString(f.name()));

typeBox->setEditable(true);

typeBox->addItems(DBBrowserDB::Datatypes);

int index = typeBox->findText(QString::fromStdString(f.type()), Qt::MatchExactly);

if(index == -1)

{

// non standard named type

typeBox->addItem(QString::fromStdString(f.type()));

index = typeBox->count() - 1;

}

typeBox->setCurrentIndex(index);

typeBox->installEventFilter(this);

connect(typeBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateTypes()));

ui->treeWidget->setItemWidget(tbitem, kType, typeBox);

tbitem->setCheckState(kNotNull, f.notnull() ? Qt::Checked : Qt::Unchecked);

tbitem->setCheckState(kPrimaryKey, contains(pk, f.name()) ? Qt::Checked : Qt::Unchecked);

tbitem->setCheckState(kAutoIncrement, f.autoIncrement() ? Qt::Checked : Qt::Unchecked);

tbitem->setCheckState(kUnique, f.unique() ? Qt::Checked : Qt::Unchecked);

// For the default value check if it is surrounded by parentheses and if that's the case

// add a '=' character before the entire string to match the input format we're expecting

// from the user when using functions in the default value field.

if(f.defaultValue().front() == '(' && f.defaultValue().back() == ')')

tbitem->setText(kDefault, "=" + QString::fromStdString(f.defaultValue()));

else

tbitem->setText(kDefault, QString::fromStdString(f.defaultValue()));

tbitem->setText(kCheck, QString::fromStdString(f.check()));

auto fk = std::dynamic_pointer_cast<sqlb::ForeignKeyClause>(m_table.constraint({f.name()}, sqlb::Constraint::ForeignKeyConstraintType));

if(fk)

tbitem->setText(kForeignKey, QString::fromStdString(fk->toString()));

ui->treeWidget->addTopLevelItem(tbitem);

}

// and reconnect

connect(ui->treeWidget, SIGNAL(itemChanged(QTreeWidgetItem*,int)),this,SLOT(itemChanged(QTreeWidgetItem*,int)));

}

void EditTableDialog::populateConstraints()

{

const auto& constraints = m_table.allConstraints();

ui->tableConstraints->blockSignals(true);

ui->tableConstraints->setRowCount(static_cast<int>(constraints.size()));

int row = 0;

for(const auto& pair : constraints)

{

const auto& columns = pair.first;

const auto& constraint = pair.second;

// Columns

QTableWidgetItem* column = new QTableWidgetItem(QString::fromStdString(sqlb::joinStringVector(columns, ",")));

column->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

ui->tableConstraints->setItem(row, kConstraintColumns, column);

// Type

QComboBox* type = new QComboBox(this);

type->addItem(tr("Primary Key"));

type->addItem(tr("Unique"));

type->addItem(tr("Foreign Key"));

type->addItem(tr("Check"));

switch(constraint->type())

{

case sqlb::Constraint::PrimaryKeyConstraintType:

type->setCurrentIndex(0);

break;

case sqlb::Constraint::UniqueConstraintType:

type->setCurrentIndex(1);

break;

case sqlb::Constraint::ForeignKeyConstraintType:

type->setCurrentIndex(2);

break;

case sqlb::Constraint::CheckConstraintType:

type->setCurrentIndex(3);

break;

default:

type->addItem(tr("Unknown"));

type->setCurrentIndex(type->count()-1);

}

ui->tableConstraints->setCellWidget(row, kConstraintType, type);

// Name

QTableWidgetItem* name = new QTableWidgetItem(QString::fromStdString(constraint->name()));

name->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled /* TODO | Qt::ItemIsEditable */);

ui->tableConstraints->setItem(row, kConstraintName, name);

// SQL

QTableWidgetItem* sql = new QTableWidgetItem(QString::fromStdString(constraint->toSql(columns)));

name->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

ui->tableConstraints->setItem(row, kConstraintSql, sql);

row++;

}

ui->tableConstraints->blockSignals(false);

}

void EditTableDialog::accept()

{

// Are we editing an already existing table or designing a new one? In the first case there is a table name set,

// in the latter the current table name is empty

if(m_bNewTable)

{

// Creation of new table

if(!pdb.executeSQL(QString::fromStdString(m_table.sql(ui->comboSchema->currentText().toStdString()))))

{

QMessageBox::warning(

this,

QApplication::applicationName(),

tr("Error creating table. Message from database engine:\n%1").arg(pdb.lastError()));

return;

}

} else {

// Editing of old table

// Apply all changes to the actual table in the database

if(!pdb.alterTable(curTable, m_table, trackColumns, ui->comboSchema->currentText().toStdString()))

{

QMessageBox::warning(this, QApplication::applicationName(), pdb.lastError());

return;

}

}

QDialog::accept();

}

void EditTableDialog::reject()

{

// Then rollback to our savepoint

pdb.revertToSavepoint(m_sRestorePointName);

QDialog::reject();

}

void EditTableDialog::updateSqlText()

{

ui->sqlTextEdit->setText(QString::fromStdString(m_table.sql(ui->comboSchema->currentText().toStdString())));

}

void EditTableDialog::checkInput()

{

std::string normTableName = ui->editTableName->text().toStdString();

bool valid = true;

if(normTableName.empty())

valid = false;

if(ui->treeWidget->topLevelItemCount() == 0)

valid = false;

if (normTableName != m_table.name()) {

const std::string oldTableName = m_table.name();

m_table.setName(normTableName);

m_fkEditorDelegate->updateTablesList(oldTableName);

// update fk's that refer to table itself recursively

const auto& fields = m_table.fields;

for(const sqlb::Field& f : fields) {

auto fk = std::dynamic_pointer_cast<sqlb::ForeignKeyClause>(m_table.constraint({f.name()}, sqlb::Constraint::ForeignKeyConstraintType));

if(fk && oldTableName == fk->table())

fk->setTable(normTableName);

}

populateFields();

}

updateSqlText();

ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(valid);

}

void EditTableDialog::updateTypes(QObject *object)

{

QComboBox* typeBox = qobject_cast<QComboBox*>(object);

if(typeBox)

{

QString type = typeBox->currentText();

std::string column = typeBox->property("column").toString().toStdString();

for(size_t index=0; index < m_table.fields.size(); ++index)

{

if(m_table.fields.at(index).name() == column)

{

m_table.fields.at(index).setType(type.toStdString());

break;

}

}

checkInput();

}

}

void EditTableDialog::updateTypes()

{

updateTypes(sender());

}

bool EditTableDialog::eventFilter(QObject *object, QEvent *event)

{

if(event->type() == QEvent::FocusOut)

{

updateTypes(object);

}

return false;

}

void EditTableDialog::itemChanged(QTreeWidgetItem *item, int column)

{

size_t index = static_cast<size_t>(ui->treeWidget->indexOfTopLevelItem(item));

if(index < m_table.fields.size())

{

sqlb::Field& field = m_table.fields.at(index);

QString oldFieldName = QString::fromStdString(field.name());

switch(column)

{

case kName:

{

// When a field of that name already exists, show a warning to the user and don't apply the new name. This is done by searching for an

// existing field with the new name. There is one exception, however, to this rule: if the field that we have found is the same field

// as the one we are currently trying to rename, this means the user is trying to rename the field to essentially the same name but

// with different case. Example: if I rename column 'COLUMN' to 'column', findField() is going to return the current field number

// because it's doing a case-independent search and it can't return another field number because SQLite prohibits duplicate field

// names (no matter the case). So when this happens we just allow the renaming because there's no harm to be expected from it.

auto foundField = sqlb::findField(m_table, item->text(column).toStdString());

if(foundField != m_table.fields.end() && foundField-m_table.fields.begin() != static_cast<int>(index))

{

QMessageBox::warning(this, qApp->applicationName(), tr("There already is a field with that name. Please rename it first or choose a different "

"name for this field."));

// Reset the name to the old value but avoid calling this method again for that automatic change

ui->treeWidget->blockSignals(true);

item->setText(column, oldFieldName);

ui->treeWidget->blockSignals(false);

return;

}

// When editing an exiting table, check if any foreign keys would cause trouble in case this name is edited

if(!m_bNewTable)

{

sqlb::StringVector pk = m_table.primaryKey();

const auto tables = pdb.schemata[curTable.schema()].equal_range("table");

for(auto it=tables.first;it!=tables.second;++it)

{

const sqlb::ObjectPtr& fkobj = it->second;

auto fks = std::dynamic_pointer_cast<sqlb::Table>(fkobj)->constraints(sqlb::StringVector(), sqlb::Constraint::ForeignKeyConstraintType);

for(const sqlb::ConstraintPtr& fkptr : fks)

{

auto fk = std::dynamic_pointer_cast<sqlb::ForeignKeyClause>(fkptr);

if(fk->table() == m_table.name())

{

if(contains(fk->columns(), field.name()) || contains(pk, field.name()))

{

QMessageBox::warning(this, qApp->applicationName(), tr("This column is referenced in a foreign key in table %1 and thus "

"its name cannot be changed.")

.arg(QString::fromStdString(fkobj->name())));

// Reset the name to the old value but avoid calling this method again for that automatic change

ui->treeWidget->blockSignals(true);

item->setText(column, oldFieldName);

ui->treeWidget->blockSignals(false);

return;

}

}

}

}

}

field.setName(item->text(column).toStdString());

m_table.renameKeyInAllConstraints(oldFieldName.toStdString(), item->text(column).toStdString());

qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(item, kType))->setProperty("column", item->text(column));

// Update the field name in the map of old column names to new column names

if(!m_bNewTable)

{

for(const auto& it : trackColumns)

{

if(trackColumns[it.first] == oldFieldName)

trackColumns[it.first] = QString::fromStdString(field.name());

}

}

// Update the constraints view

populateConstraints();

} break;

case kType:

// see updateTypes() SLOT

break;

case kPrimaryKey:

{

// Check if there already is a primary key

if(m_table.constraint(sqlb::StringVector(), sqlb::Constraint::PrimaryKeyConstraintType))

{

// There already is a primary key for this table. So edit that one as there always can only be one primary key anyway.

sqlb::StringVector& pk = m_table.primaryKeyRef();

if(item->checkState(column) == Qt::Checked)

{

pk.push_back(field.name());

} else {

pk.erase(std::remove(pk.begin(), pk.end(), field.name()), pk.end());

// If this is now a primary key constraint without any columns, remove it entirely

if(pk.empty())

m_table.removeConstraints({}, sqlb::Constraint::PrimaryKeyConstraintType);

}

} else if(item->checkState(column) == Qt::Checked) {

// There is no primary key in the table yet. This means we need to add a default one.

m_table.addConstraint({field.name()}, sqlb::ConstraintPtr(new sqlb::PrimaryKeyConstraint()));

}

if(item->checkState(column) == Qt::Checked)

{

// this will unset any other autoincrement

for(int i = 0; i < ui->treeWidget->topLevelItemCount(); ++i)

{

QTreeWidgetItem* tbitem = ui->treeWidget->topLevelItem(i);

if(tbitem != item)

tbitem->setCheckState(kAutoIncrement, Qt::Unchecked);

}

} else {

item->setCheckState(kAutoIncrement, Qt::Unchecked);

}

// Update the constraints view

populateConstraints();

}

break;

case kNotNull:

{

// When editing an existing table and trying to set a column to Not Null an extra check is needed

if(!m_bNewTable && item->checkState(column) == Qt::Checked)

{

// Because our renameColumn() function fails when setting a column to Not Null when it already contains some NULL values

// we need to check for this case and cancel here. Maybe we can think of some way to modify the INSERT INTO ... SELECT statement

// to at least replace all troublesome NULL values by the default value

SqliteTableModel m(pdb, this);

m.setQuery(QString("SELECT COUNT(%1) FROM %2 WHERE coalesce(NULL,%3) IS NULL;")

.arg(QString::fromStdString(sqlb::joinStringVector(sqlb::escapeIdentifier(pdb.getObjectByName<sqlb::Table>(curTable)->rowidColumns()), ",")))

.arg(QString::fromStdString(curTable.toString()))

.arg(QString::fromStdString(sqlb::escapeIdentifier(field.name()))));

if(!m.completeCache())

{

// If we couldn't load all data because the cancel button was clicked, just unset the checkbox again and stop.

item->setCheckState(column, Qt::Unchecked);

return;

}

if(m.data(m.index(0, 0)).toInt() > 0)

{

// There is a NULL value, so print an error message, uncheck the combobox, and return here

QMessageBox::information(this, qApp->applicationName(), tr("There is at least one row with this field set to NULL. "

"This makes it impossible to set this flag. Please change the table data first."));

item->setCheckState(column, Qt::Unchecked);

return;

}

}

field.setNotNull(item->checkState(column) == Qt::Checked);

}

break;

case kAutoIncrement:

{

bool ischecked = item->checkState(column) == Qt::Checked;

if(ischecked)

{

// First check if the contents of this column are all integers. If not this field cannot be set to AI

if(!m_bNewTable)

{

SqliteTableModel m(pdb, this);

m.setQuery(QString("SELECT COUNT(*) FROM %1 WHERE %2 <> CAST(%3 AS INTEGER);")

.arg(QString::fromStdString(curTable.toString()))

.arg(QString::fromStdString(sqlb::escapeIdentifier(field.name())))

.arg(QString::fromStdString(sqlb::escapeIdentifier(field.name()))));

if(!m.completeCache())

{

// If we couldn't load all data because the cancel button was clicked, just unset the checkbox again and stop.

item->setCheckState(column, Qt::Unchecked);

return;

}

if(m.data(m.index(0, 0)).toInt() > 0)

{

// There is a non-integer value, so print an error message, uncheck the combobox, and return here

QMessageBox::information(this, qApp->applicationName(), tr("There is at least one row with a non-integer value in this field. "

"This makes it impossible to set the AI flag. Please change the table data first."));

item->setCheckState(column, Qt::Unchecked);

return;

}

}

// Make sure the data type is set to integer

QComboBox* comboType = qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(item, kType));

comboType->setCurrentIndex(comboType->findText("INTEGER"));

item->setCheckState(kPrimaryKey, Qt::Checked);

// this will unset all other primary keys

// there can't be more than one autoincrement pk

for(int i = 0; i < ui->treeWidget->topLevelItemCount(); ++i)

{

QTreeWidgetItem* tbitem = ui->treeWidget->topLevelItem(i);

if(tbitem != item)

{

tbitem->setCheckState(kAutoIncrement, Qt::Unchecked);

tbitem->setCheckState(kPrimaryKey, Qt::Unchecked);

}

}

}

field.setAutoIncrement(ischecked);

}

break;

case kUnique:

{

// When editing an existing table and trying to set a column to unique an extra check is needed

if(!m_bNewTable && item->checkState(column) == Qt::Checked)

{

// Because our renameColumn() function fails when setting a column to unique when it already contains the same values

SqliteTableModel m(pdb, this);

m.setQuery(QString("SELECT COUNT(%2) FROM %1;").arg(QString::fromStdString(curTable.toString())).arg(QString::fromStdString(sqlb::escapeIdentifier(field.name()))));

if(!m.completeCache())

{

// If we couldn't load all data because the cancel button was clicked, just unset the checkbox again and stop.

item->setCheckState(column, Qt::Unchecked);

return;

}

int rowcount = m.data(m.index(0, 0)).toInt();

m.setQuery(QString("SELECT COUNT(DISTINCT %2) FROM %1;").arg(QString::fromStdString(curTable.toString())).arg(QString::fromStdString(sqlb::escapeIdentifier(field.name()))));

if(!m.completeCache())

{

// If we couldn't load all data because the cancel button was clicked, just unset the checkbox again and stop.

item->setCheckState(column, Qt::Unchecked);

return;

}

int uniquecount = m.data(m.index(0, 0)).toInt();

if(rowcount != uniquecount)

{

// There is a NULL value, so print an error message, uncheck the combobox, and return here

QMessageBox::information(this, qApp->applicationName(), tr("Column '%1' has duplicate data.\n").arg(QString::fromStdString(field.name()))

+ tr("This makes it impossible to enable the 'Unique' flag. Please remove the duplicate data, which will allow the 'Unique' flag to then be enabled."));

item->setCheckState(column, Qt::Unchecked);

return;

}

}

field.setUnique(item->checkState(column) == Qt::Checked);

}

break;

case kDefault:

{

QString new_value = item->text(column);

// If the default value isn't a SQL keyword perform an extra check: If it isn't numeric but doesn't start and end with quotes,

// add the quotes

if(new_value.size() && new_value.compare("null", Qt::CaseInsensitive) &&

new_value.compare("current_time", Qt::CaseInsensitive) &&

new_value.compare("current_date", Qt::CaseInsensitive) &&

new_value.compare("current_timestamp", Qt::CaseInsensitive))

{

QChar first_char = new_value.trimmed().at(0);

if(!((first_char == '\'' || first_char == '"') && new_value.trimmed().endsWith(first_char)))

{

bool is_numeric;

new_value.toDouble(&is_numeric);

if(!is_numeric)

{

if(new_value.trimmed().startsWith("=(") && new_value.trimmed().endsWith(')'))

{

new_value = new_value.trimmed().mid(1); // Leave the brackets as they are needed for a valid SQL expression

} else {

new_value = QString("'%1'").arg(new_value.replace("'", "''"));

item->setText(column, new_value);

}

}

}

}

field.setDefaultValue(new_value.toStdString());

}

break;

case kCheck:

field.setCheck(item->text(column).toStdString());

break;

case kForeignKey:

// handled in delegate

break;

}

}

checkInput();

}

void EditTableDialog::addField()

{

QTreeWidgetItem *tbitem = new QTreeWidgetItem(ui->treeWidget);

tbitem->setFlags(tbitem->flags() | Qt::ItemIsEditable);

// Find an unused name for the field by starting with 'Fieldx' where x is the number of fields + 1.

// If this name happens to exist already, increase x by one until we find an unused name.

{

int field_number = ui->treeWidget->topLevelItemCount();

std::string field_name;

do

{

field_name = "Field" + std::to_string(field_number);

field_number++;

} while(sqlb::findField(m_table, field_name) != m_table.fields.end());

tbitem->setText(kName, QString::fromStdString(field_name));

}

QComboBox* typeBox = new QComboBox(ui->treeWidget);

typeBox->setProperty("column", tbitem->text(kName));

typeBox->setEditable(true);

typeBox->addItems(DBBrowserDB::Datatypes);

int defaultFieldTypeIndex = Settings::getValue("db", "defaultfieldtype").toInt();

if (defaultFieldTypeIndex < DBBrowserDB::Datatypes.count())

{

typeBox->setCurrentIndex(defaultFieldTypeIndex);

}

ui->treeWidget->setItemWidget(tbitem, kType, typeBox);

typeBox->installEventFilter(this);

connect(typeBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateTypes()));

tbitem->setCheckState(kNotNull, Qt::Unchecked);

tbitem->setCheckState(kPrimaryKey, Qt::Unchecked);

tbitem->setCheckState(kAutoIncrement, Qt::Unchecked);

tbitem->setCheckState(kUnique, Qt::Unchecked);

ui->treeWidget->addTopLevelItem(tbitem);

ui->treeWidget->scrollToBottom();

ui->treeWidget->editItem(tbitem, 0);

// add field to table object

m_table.fields.emplace_back(tbitem->text(kName).toStdString(), typeBox->currentText().toStdString());

// Add the new column to the list of tracked columns to indicate it has been added

if(!m_bNewTable)

trackColumns.insert({QString(), tbitem->text(kName)});

checkInput();

}

void EditTableDialog::removeField()

{

// Is there any item selected to delete?

if(!ui->treeWidget->currentItem())

return;

// If we are editing an existing table, ask the user for confirmation

if(!m_bNewTable)

{

QString msg = tr("Are you sure you want to delete the field '%1'?\nAll data currently stored in this field will be lost.").arg(ui->treeWidget->currentItem()->text(0));

if(QMessageBox::warning(this, QApplication::applicationName(), msg, QMessageBox::Yes | QMessageBox::No, QMessageBox::No) == QMessageBox::No)

return;

// Update the map of tracked columns to indicate the column is deleted

QString name = ui->treeWidget->currentItem()->text(0);

for(const auto& it : trackColumns)

{

if(trackColumns[it.first] == name)

trackColumns[it.first] = QString();

}

}

// Just delete that item. At this point there is no DB table to edit or data to be lost anyway

m_table.fields.erase(m_table.fields.begin() + ui->treeWidget->indexOfTopLevelItem(ui->treeWidget->currentItem()));

m_table.removeKeyFromAllConstraints(ui->treeWidget->currentItem()->text(kName).toStdString());

delete ui->treeWidget->currentItem();

// Update the constraints view

populateConstraints();

checkInput();

}

void EditTableDialog::fieldSelectionChanged()

{

bool hasSelection = ui->treeWidget->selectionModel()->hasSelection();

// Enable the remove and the move up/down buttons if a field is selected, disable it otherwise

ui->removeFieldButton->setEnabled(hasSelection);

ui->buttonMoveUp->setEnabled(hasSelection);

ui->buttonMoveDown->setEnabled(hasSelection);

// If the selected line is the first one disable the move up button, it it's the last one disable the move down button

if(hasSelection)

{

ui->buttonMoveUp->setEnabled(ui->treeWidget->selectionModel()->currentIndex().row() != 0);

ui->buttonMoveDown->setEnabled(ui->treeWidget->selectionModel()->currentIndex().row() != ui->treeWidget->topLevelItemCount() - 1);

}

}

void EditTableDialog::moveUp()

{

moveCurrentField(false);

}

void EditTableDialog::moveDown()

{

moveCurrentField(true);

}

void EditTableDialog::moveCurrentField(bool down)

{

int currentRow = ui->treeWidget->currentIndex().row();

int newRow = currentRow + (down ? 1 : -1);

// Save the combobox first by making a copy

QComboBox* oldCombo = qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(ui->treeWidget->topLevelItem(currentRow), kType));

QComboBox* newCombo = new QComboBox(ui->treeWidget);

newCombo->setProperty("column", oldCombo->property("column"));

newCombo->installEventFilter(this);

connect(newCombo, SIGNAL(currentIndexChanged(int)), this, SLOT(updateTypes()));

newCombo->setEditable(true);

for(int i=0; i < oldCombo->count(); ++i)

newCombo->addItem(oldCombo->itemText(i));

newCombo->setCurrentIndex(oldCombo->currentIndex());

// Now, just remove the item and insert it at it's new position, then restore the combobox

QTreeWidgetItem* item = ui->treeWidget->takeTopLevelItem(currentRow);

ui->treeWidget->insertTopLevelItem(newRow, item);

ui->treeWidget->setItemWidget(item, kType, newCombo);

// Select the old item at its new position

ui->treeWidget->setCurrentIndex(ui->treeWidget->currentIndex().sibling(newRow, 0));

// Finally update the table SQL

std::swap(m_table.fields[static_cast<size_t>(newRow)], m_table.fields[static_cast<size_t>(currentRow)]);

// Update the SQL preview

updateSqlText();

}

void EditTableDialog::setWithoutRowid(bool without_rowid)

{

if(without_rowid)

{

// Before setting the without rowid flag, first perform a check to see if the table meets all the required criteria for without rowid tables

auto pks = m_table.primaryKey();

for(const auto& pk_name : pks)

{

auto pk = sqlb::findField(m_table, pk_name);

if(pk == m_table.fields.end() || pk->autoIncrement())

{

QMessageBox::information(this, QApplication::applicationName(),

tr("Please add a field which meets the following criteria before setting the without rowid flag:\n"

" - Primary key flag set\n"

" - Auto increment disabled"));

// Reset checkbox state to unchecked. Block any signals while doing this in order to avoid an extra call to

// this function being triggered.

ui->checkWithoutRowid->blockSignals(true);

ui->checkWithoutRowid->setChecked(false);

ui->checkWithoutRowid->blockSignals(false);

return;

}

}

// If it does, set the without rowid flag of the table

m_table.setWithoutRowidTable(true);

} else {

// If the without rowid flag is unset no further checks are required. Just unset the without rowid flag

m_table.setWithoutRowidTable(false);

}

// Update the SQL preview

updateSqlText();

}

void EditTableDialog::changeSchema(const QString& /*schema*/)

{

// Update the SQL preview

updateSqlText();

}