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/*
* enummanager.cpp
*
* (c) 2002-2004,2008-2010 by Jeremy Bowman <jmbowman@alum.mit.edu>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*/
/** @file enummanager.cpp
* Source file for EnumManager
*/
#include <QApplication>
#include <QLabel>
#include <QLayout>
#include <QListWidget>
#include <QMessageBox>
#include <QPushButton>
#include <QStringList>
#include <QStackedWidget>
#include "database.h"
#include "enumeditor.h"
#include "enummanager.h"
#include "factory.h"
#include "viewdisplay.h"
/**
* Constructor.
*
* @param dbase The database to be edited
* @param parent This dialog's parent widget
* @param viewDisplay The main data display widget
*/
EnumManager::EnumManager(Database *dbase, QWidget *parent, ViewDisplay *viewDisplay)
: PBDialog(tr("Enum Manager"), parent), viewer(viewDisplay),
contentChanged(false), orderChanged(false)
{
stack = new QStackedWidget(this);
vbox->addWidget(stack, 1);
QString text("<center>%1<br><br>%2</center>");
text = text.arg(tr("No enumerated column types defined"));
text = text.arg(tr("Press the \"Add\" button to create one"));
noEnums = new QLabel(text, stack);
stack->addWidget(noEnums);
db = dbase;
listWidget = Factory::listWidget(stack);
stack->addWidget(listWidget);
listWidget->addItems(db->listEnums());
if (listWidget->count() == 0) {
stack->setCurrentWidget(noEnums);
}
else {
stack->setCurrentWidget(listWidget);
}
addEditButtons();
connect(addButton, SIGNAL(clicked()), this, SLOT(addEnum()));
connect(editButton, SIGNAL(clicked()), this, SLOT(editEnum()));
connect(deleteButton, SIGNAL(clicked()), this, SLOT(deleteEnum()));
connect(upButton, SIGNAL(clicked()), this, SLOT(moveUp()));
connect(downButton, SIGNAL(clicked()), this, SLOT(moveDown()));
finishLayout();
}
/**
* Create a new enumeration. Triggered by the "Add" button.
*/
void EnumManager::addEnum()
{
EnumEditor enumEditor(this);
if (enumEditor.edit(db, "")) {
enumEditor.applyChanges();
listWidget->addItem(enumEditor.getName());
stack->setCurrentWidget(listWidget);
contentChanged = true;
}
}
/**
* Edit the selected enumeration. Triggered by the "Edit" button.
*/
void EnumManager::editEnum()
{
QListWidgetItem *item = listWidget->currentItem();
if (!item) {
return;
}
QString enumName = item->text();
EnumEditor enumEditor(this);
if (enumEditor.edit(db, enumName)) {
viewer->closeView();
enumEditor.applyChanges();
viewer->setDatabase(db);
item->setText(enumEditor.getName());
contentChanged = true;
}
}
/**
* Delete the selected enumeration. Triggered by the "Delete" button.
*/
void EnumManager::deleteEnum()
{
QListWidgetItem *item = listWidget->currentItem();
if (!item) {
return;
}
QString enumName = item->text();
QStringList deleteCols = db->columnsUsingEnum(enumName);
int count = deleteCols.count();
if (count > 0) {
QString msg = tr("The following columns which\nuse this enum will also be\ndeleted:");
for (int i = 0; i < count; i++) {
msg += "\n " + deleteCols[i];
}
msg += "\n" + tr("Continue?");
int choice = QMessageBox::warning(this, qApp->applicationName(), msg,
QMessageBox::Yes|QMessageBox::No,
QMessageBox::No);
if (choice != QMessageBox::Yes) {
return;
}
}
viewer->closeView();
db->deleteEnum(enumName);
viewer->setDatabase(db);
delete item;
if (listWidget->count() == 0) {
stack->setCurrentWidget(noEnums);
}
contentChanged = true;
}
/**
* Move the selected enumeration up by one in the list. Triggered by the
* "Up" button.
*/
void EnumManager::moveUp()
{
int row = listWidget->currentRow();
if (row > 0) {
QListWidgetItem *item = listWidget->takeItem(row);
listWidget->insertItem(row - 1, item);
listWidget->setCurrentRow(row - 1);
orderChanged = true;
}
}
/**
* Move the selected enumeration down by one in the list. Triggered by the
* "Down" button.
*/
void EnumManager::moveDown()
{
int row = listWidget->currentRow();
int count = listWidget->count();
if (row < count - 1) {
QListWidgetItem *item = listWidget->takeItem(row);
listWidget->insertItem(row + 1, item);
listWidget->setCurrentRow(row + 1);
orderChanged = true;
}
}
/**
* Apply the changes made in this dialog to the database.
*/
void EnumManager::applyChanges()
{
if (!orderChanged && !contentChanged) {
return;
}
QStringList names;
int count = listWidget->count();
for (int i = 0; i < count; i++) {
names.append(listWidget->item(i)->text());
}
db->setEnumSequence(names);
contentChanged = true;
}
/**
* Determine if any changes were made in this dialog.
*
* @return True if changes were made, false otherwise
*/
bool EnumManager::changesMade()
{
return contentChanged;
}
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