Warning, file /education/kmplot/kmplot/kconstanteditor.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /*
     KmPlot - a math. function plotter for the KDE-Desktop
 
     SPDX-FileCopyrightText: 2004 Fredrik Edemar <f_edemar@linux.se>
     SPDX-FileCopyrightText: 2006 David Saxton <david@bluehaze.org>
 
     This file is part of the KDE Project.
     KmPlot is part of the KDE-EDU Project.
 
     SPDX-License-Identifier: GPL-2.0-or-later
 
 */
 
 #include "kconstanteditor.h"
 #include "kmplotio.h"
 #include "view.h"
 #include "xparser.h"
 
 #include <QDebug>
 #include <QDialogButtonBox>
 #include <QStandardPaths>
 #include <QTimer>
 
 #include <KConfigGroup>
 #include <KMessageBox>
 #include <assert.h>
 
 #include "ui_constantseditor.h"
 class ConstantsEditorWidget : public QWidget, public Ui::ConstantsEditor
 {
 public:
     ConstantsEditorWidget(QWidget *parent = 0)
         : QWidget(parent)
     {
         setupUi(this);
     }
 };
 
 // BEGIN class KConstantEditor
 KConstantEditor::KConstantEditor(QWidget *parent)
     : QDialog(parent)
 {
     m_widget = new ConstantsEditorWidget(this);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close);
     connect(buttonBox, &QDialogButtonBox::rejected, this, &KConstantEditor::reject);
     QVBoxLayout *dialogLayout = new QVBoxLayout(this);
     dialogLayout->addWidget(m_widget);
     dialogLayout->addWidget(buttonBox);
 
     m_widget->cmdNew->setIcon(QIcon::fromTheme("document-new"));
     m_widget->cmdDelete->setIcon(QIcon::fromTheme("edit-delete"));
 
     setWindowTitle(i18nc("@title:window", "Constants Editor"));
 
     connect(this, &KConstantEditor::finished, this, &KConstantEditor::dialogFinished);
 
     m_constantValidator = new ConstantValidator(this);
     m_widget->nameEdit->setValidator(m_constantValidator);
 
     updateConstantsList();
 
     connect(m_widget->nameEdit, &KLineEdit::textEdited, this, &KConstantEditor::constantNameEdited);
     connect(m_widget->valueEdit, &EquationEdit::textEdited, this, &KConstantEditor::saveCurrentConstant);
 
     connect(m_widget->nameEdit, &KLineEdit::textChanged, this, &KConstantEditor::checkValueValid);
     connect(m_widget->valueEdit, &EquationEdit::textChanged, this, &KConstantEditor::checkValueValid);
 
     connect(m_widget->cmdNew, &QPushButton::clicked, this, &KConstantEditor::cmdNew_clicked);
     connect(m_widget->cmdDelete, &QPushButton::clicked, this, &KConstantEditor::cmdDelete_clicked);
 
     connect(m_widget->constantList, &QTreeWidget::currentItemChanged, this, &KConstantEditor::selectedConstantChanged);
     connect(m_widget->constantList, &QTreeWidget::itemClicked, this, &KConstantEditor::itemClicked);
 
     connect(XParser::self()->constants(), &Constants::constantsChanged, this, &KConstantEditor::updateConstantsList);
 
     checkValueValid();
 }
 
 KConstantEditor::~KConstantEditor()
 {
 }
 
 void KConstantEditor::dialogFinished()
 {
     XParser::self()->reparseAllFunctions();
     View::self()->drawPlot();
 }
 
 void KConstantEditor::updateConstantsList()
 {
     m_widget->constantList->blockSignals(true);
 
     // This assumes that constants have only been added or their value changed.
     // (since constants can only be removed via this dialog)
 
     ConstantList constants = XParser::self()->constants()->list(Constant::All);
     for (ConstantList::iterator it = constants.begin(); it != constants.end(); ++it) {
         QList<QTreeWidgetItem *> list = m_widget->constantList->findItems(it.key(), Qt::MatchExactly);
         if (!list.isEmpty())
             init(list.first(), it.key(), it.value());
         else {
             QTreeWidgetItem *item = new QTreeWidgetItem(m_widget->constantList);
             init(item, it.key(), it.value());
         }
     }
 
     m_widget->constantList->blockSignals(false);
 }
 
 void KConstantEditor::init(QTreeWidgetItem *item, const QString &name, const Constant &constant)
 {
     item->setText(0, name);
     item->setText(1, constant.value.expression());
     item->setData(2, Qt::CheckStateRole, (constant.type & Constant::Document) ? Qt::Checked : Qt::Unchecked);
     item->setData(2, Qt::ToolTipRole, i18n("Check this to have the constant exported when saving."));
     //  item->setData( 2, Qt::WhatsThisRole, i18n("Document constants are saved with the documents, and will be loaded again when the document is opened.") );
     item->setData(3, Qt::CheckStateRole, (constant.type & Constant::Global) ? Qt::Checked : Qt::Unchecked);
     item->setData(3, Qt::ToolTipRole, i18n("Check this to have the constant permanently available between instances of KmPlot."));
     //  item->setData( 3, Qt::WhatsThisRole, i18n("Global constants are stored in KmPlot's settings. They are not lost when KmPlot is closed.") );
 }
 
 void KConstantEditor::cmdNew_clicked()
 {
     QTreeWidgetItem *item = new QTreeWidgetItem(m_widget->constantList);
 
     init(item, XParser::self()->constants()->generateUniqueName(), Constant());
 
     m_widget->constantList->setCurrentItem(item);
     m_widget->nameEdit->setFocus();
 }
 
 void KConstantEditor::cmdDelete_clicked()
 {
     QTreeWidgetItem *item = m_widget->constantList->currentItem();
     if (!item)
         return;
 
     XParser::self()->constants()->remove(item->text(0));
 
     m_widget->nameEdit->clear();
     m_widget->valueEdit->clear();
     m_widget->constantList->takeTopLevelItem(m_widget->constantList->indexOfTopLevelItem(item));
     delete item;
 
     m_widget->cmdDelete->setEnabled(m_widget->constantList->currentItem() != 0);
 }
 
 void KConstantEditor::selectedConstantChanged(QTreeWidgetItem *current)
 {
     m_widget->cmdDelete->setEnabled(current != 0);
 
     QString name = current ? current->text(0) : QString();
     QString value = current ? current->text(1) : QString();
 
     m_previousConstantName = name;
     m_constantValidator->setWorkingName(m_previousConstantName);
 
     m_widget->nameEdit->setText(name);
     m_widget->valueEdit->setText(value);
 }
 
 void KConstantEditor::constantNameEdited(const QString &newName)
 {
     QTreeWidgetItem *current = m_widget->constantList->currentItem();
     if (!current) {
         Constant constant;
         constant.value.updateExpression(m_widget->valueEdit->text());
 
         current = new QTreeWidgetItem(m_widget->constantList);
         init(current, newName, constant);
     }
 
     XParser::self()->constants()->remove(m_previousConstantName);
 
     current->setText(0, newName);
     m_widget->constantList->setCurrentItem(current); // make it the current item if no item was selected before
 
     m_previousConstantName = newName;
 
     m_constantValidator->setWorkingName(m_previousConstantName);
 
     saveCurrentConstant();
 }
 
 void KConstantEditor::saveCurrentConstant()
 {
     if (m_widget->nameEdit->text().isEmpty())
         return;
 
     QTreeWidgetItem *current = m_widget->constantList->currentItem();
     assert(current);
     current->setText(1, m_widget->valueEdit->text());
 
     Constant constant;
     constant.value.updateExpression(m_widget->valueEdit->text());
 
     // update type
     constant.type = 0;
     if (current->data(2, Qt::CheckStateRole).toBool())
         constant.type |= Constant::Document;
     if (current->data(3, Qt::CheckStateRole).toBool())
         constant.type |= Constant::Global;
 
     XParser::self()->constants()->add(m_widget->nameEdit->text(), constant);
 }
 
 bool KConstantEditor::checkValueValid()
 {
     Parser::Error error;
     (double)XParser::self()->eval(m_widget->valueEdit->text(), &error);
     bool valid = (error == Parser::ParseSuccess) && m_constantValidator->isValid(m_widget->nameEdit->text());
     m_widget->valueInvalidLabel->setVisible(!valid);
     return valid;
 }
 
 void KConstantEditor::itemClicked()
 {
     QTimer::singleShot(0, this, &KConstantEditor::saveCurrentConstant);
 }
 // END class KConstantEditor
 
 // BEGIN class ConstantValidator
 ConstantValidator::ConstantValidator(KConstantEditor *parent)
     : QValidator(parent)
 {
 }
 
 bool ConstantValidator::isValid(const QString &name) const
 {
     bool correct = XParser::self()->constants()->isValidName(name);
     bool inUse = XParser::self()->constants()->have(name) && (m_workingName != name);
 
     return correct && !inUse;
 }
 
 QValidator::State ConstantValidator::validate(QString &input, int & /*pos*/) const
 {
     return isValid(input) ? Acceptable : Intermediate;
 }
 
 void ConstantValidator::setWorkingName(const QString &name)
 {
     m_workingName = name;
 }
 // END class ConstantValidator