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/*
* calcnodeeditor.cpp
*
* (c) 2003-2004,2008-2010 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 calcnodeeditor.cpp
* Source file for CalcNodeEditor
*/
#include <QApplication>
#include <QButtonGroup>
#include <QComboBox>
#include <QListWidget>
#include <QMessageBox>
#include <QRadioButton>
#include "calcnode.h"
#include "calcnodeeditor.h"
#include "../datatypes.h"
#include "../factory.h"
#include "../formatting.h"
#include "../numberwidget.h"
/**
* Constructor.
*
* @param colNames Ordered list of all the database's column names
* @param colTypes Ordered list of all the database's column types
* @param showOps True if the list of operations is to be shown, false otherwise
* @param parent This dialog's parent widget
*/
CalcNodeEditor::CalcNodeEditor(const QStringList &colNames, int *colTypes, bool showOps, QWidget *parent)
: PBDialog(tr("Calculation Node Editor"), parent)
{
group = new QButtonGroup(this);
QGridLayout *grid = Factory::gridLayout(vbox);
QRadioButton *colButton = new QRadioButton(tr("Column"), this);
group->addButton(colButton, 0);
grid->addWidget(colButton, 0, 0);
columnList = new QComboBox(this);
grid->addWidget(columnList, 0, 1);
int count = colNames.count();
int i;
for (i = 0; i < count; i++) {
int t = colTypes[i];
if (t == INTEGER || t == FLOAT || t == SEQUENCE || t == BOOLEAN) {
columnList->addItem(colNames[i]);
}
}
connect(columnList, SIGNAL(activated(int)),
this, SLOT(columnSelected(int)));
QRadioButton *constantButton = new QRadioButton(tr("Constant"), this);
group->addButton(constantButton, 1);
grid->addWidget(constantButton, 1, 0);
number = new NumberWidget(FLOAT, this);
grid->addWidget(number, 1, 1);
if (showOps) {
QRadioButton *opButton = new QRadioButton(tr("Operation"), this);
group->addButton(opButton, 2);
grid->addWidget(opButton, 2, 0, Qt::AlignLeft | Qt::AlignTop);
opList = Factory::listWidget(this);
grid->addWidget(opList, 2, 1);
opList->addItems(CalcNode::listOperations());
connect(opList, SIGNAL(itemSelectionChanged()),
this, SLOT(operationSelected()));
}
else {
opList = 0;
}
if (columnList->count() > 0) {
group->button(0)->setChecked(true);
}
else {
// no numeric columns, so can't select one
group->button(1)->setChecked(true);
colButton->setEnabled(false);
}
int minHeight = showOps ? parent->height() : -1;
finishLayout(parent->width() / 2, minHeight);
}
/**
* Reset the dialog's entry widgets to their default values. Typically used
* when relaunching it for a different node.
*/
void CalcNodeEditor::reset()
{
if (columnList->count() > 0) {
columnList->setCurrentIndex(0);
}
number->setValue("0");
if (opList != 0) {
opList->setCurrentRow(0);
}
group->button(0)->setChecked(true);
}
/**
* Create a new calculation node and set it's properties to match those
* currently selected in this dialog.
*
* @return The newly created and configured node
*/
CalcNode *CalcNodeEditor::createNode()
{
CalcNode *node = new CalcNode(CalcNode::Constant, "");
updateNode(node);
return node;
}
/**
* Set the properties of the provided node to match those currently
* selected in this dialog.
*
* @param node The node to be updated
*/
void CalcNodeEditor::updateNode(CalcNode *node)
{
int selection = group->checkedId();
if (selection == 0) {
node->setType(CalcNode::Column);
node->setValue(columnList->currentText());
}
else if (selection == 1) {
node->setType(CalcNode::Constant);
node->setValue(number->getValue());
}
else {
node->setType((CalcNode::NodeType)(opList->currentRow() + CALC_FIRST_OP));
node->setValue("");
}
}
/**
* Update this dialog's properties to match those of the provided node.
*
* @param node The node to be reflected by the dialog
*/
void CalcNodeEditor::setNode(CalcNode *node)
{
reset();
CalcNode::NodeType type = node->type();
QString value = node->value();
if (type == CalcNode::Constant) {
group->button(1)->setChecked(true);
number->setValue(value);
}
else if (type == CalcNode::Column) {
group->button(0)->setChecked(true);
int count = columnList->count();
for (int i = 0; i < count; i++) {
if (columnList->itemText(i) == value) {
columnList->setCurrentIndex(i);
break;
}
}
}
}
/**
* Determine if the currently entered values represent a valid node or not.
*
* @return True if the selected properties are valid, false otherwise
*/
bool CalcNodeEditor::isValid()
{
if (group->checkedId() != 1) {
return true;
}
bool ok = false;
Formatting::parseDouble(number->getValue(), &ok);
if (!ok) {
QMessageBox::warning(this, qApp->applicationName(),
tr("Constant must be a decimal value"));
}
return ok;
}
/**
* Called when a column is selected from the combo box, in order to
* automatically check the appropriate radio button.
*/
void CalcNodeEditor::columnSelected(int)
{
group->button(0)->setChecked(true);
}
/**
* Called when an operation is selected from the list, in order to
* automatically check the appropriate radio button.
*/
void CalcNodeEditor::operationSelected()
{
group->button(2)->setChecked(true);
}
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