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/*
* filtereditor.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 filtereditor.cpp
* Source file for FilterEditor
*/
#include <QLabel>
#include <QLineEdit>
#include <QListWidget>
#include <QMessageBox>
#include <QPushButton>
#include "database.h"
#include "condition.h"
#include "conditioneditor.h"
#include "factory.h"
#include "filter.h"
#include "filtereditor.h"
/**
* Constructor.
*
* @param parent This dialog's parent widget
*/
FilterEditor::FilterEditor(QWidget *parent)
: PBDialog(tr("Filter Editor"), parent), db(0), filter(0)
{
QHBoxLayout *hbox = Factory::hBoxLayout(vbox);
hbox->addWidget(new QLabel(tr("Filter Name") + " ", this));
nameBox = new QLineEdit(this);
hbox->addWidget(nameBox);
listWidget = Factory::listWidget(this);
vbox->addWidget(listWidget);
addEditButtons();
connect(addButton, SIGNAL(clicked()), this, SLOT(addCondition()));
connect(editButton, SIGNAL(clicked()), this, SLOT(editCondition()));
connect(deleteButton, SIGNAL(clicked()), this, SLOT(deleteCondition()));
connect(upButton, SIGNAL(clicked()), this, SLOT(moveUp()));
connect(downButton, SIGNAL(clicked()), this, SLOT(moveDown()));
finishLayout();
nameBox->setFocus();
}
/**
* Destructor.
*/
FilterEditor::~FilterEditor()
{
if (filter) {
delete filter;
}
}
/**
* Launch this dialog to edit a filter.
*
* @param subject The database being edited
* @param filterName The name of the filter to edit
* @return 1 if the dialog's changes are to be committed, 0 otherwise
*/
int FilterEditor::edit(Database *subject, const QString &filterName)
{
db = subject;
originalName = filterName;
nameBox->setText(filterName);
if (filter) {
delete filter;
}
conditionEditor = new ConditionEditor(db, this);
filter = new Filter(db, filterName);
updateList();
int result = exec();
while (result) {
if (hasValidName()) {
break;
}
else {
result = exec();
}
}
delete conditionEditor;
return result;
}
/**
* Get the last specified name for this filter.
*
* @return The filter's name
*/
QString FilterEditor::getName()
{
return nameBox->text();
}
/**
* Add a new condition to the filter. Triggered by the "Add" button.
*/
void FilterEditor::addCondition()
{
Condition *condition = new Condition(db);
if (conditionEditor->edit(condition)) {
conditionEditor->applyChanges(condition);
filter->addCondition(condition);
updateList();
}
else {
delete condition;
}
}
/**
* Edit one of the filter's existing conditions. Triggered by the "Edit"
* button.
*/
void FilterEditor::editCondition()
{
int selected = listWidget->currentRow();
if (selected == -1) {
return;
}
Condition *condition = filter->getCondition(selected);
if (conditionEditor->edit(condition)) {
conditionEditor->applyChanges(condition);
updateList();
listWidget->setCurrentRow(selected);
}
}
/**
* Delete the currently selected condition. Triggered by the "Delete"
* button.
*/
void FilterEditor::deleteCondition()
{
int selected = listWidget->currentRow();
if (selected == -1) {
return;
}
filter->deleteCondition(selected);
updateList();
}
/**
* Move the currently selected condition up by one in the sequence.
* Triggered by the "Up" button.
*/
void FilterEditor::moveUp()
{
int selected = listWidget->currentRow();
if (selected == -1) {
return;
}
if (filter->moveConditionUp(selected)) {
updateList();
listWidget->setCurrentRow(selected - 1);
}
}
/**
* Move the currently selected condition down by one in the sequence.
* Triggered by the "Down" button.
*/
void FilterEditor::moveDown()
{
int selected = listWidget->currentRow();
if (selected == -1) {
return;
}
if (filter->moveConditionDown(selected)) {
updateList();
listWidget->setCurrentRow(selected + 1);
}
}
/**
* Update the displayed list of conditions.
*/
void FilterEditor::updateList()
{
listWidget->clear();
int count = filter->getConditionCount();
for (int i = 0; i < count; i++) {
listWidget->addItem(filter->getCondition(i)->getDescription());
}
}
/**
* Determine if the currently specified filter name is valid or not.
* Prevents duplicates and names beginning with an underscore.
*
* @return True if the name is valid, false otherwise
*/
bool FilterEditor::hasValidName()
{
return validateName(nameBox->text(), originalName, db->listFilters());
}
/**
* Apply any changes made in this dialog.
*/
void FilterEditor::applyChanges()
{
db->deleteFilter(originalName);
filter->setName(nameBox->text());
db->addFilter(filter);
}
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