kalgebra.cpp

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/*************************************************************************************
 *  Copyright (C) 2007 by Aleix Pol <aleixpol@kde.org>                               *
 *                                                                                   *
 *  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.                           *
 *                                                                                   *
 *  This program is distributed in the hope that it will be useful,                  *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of                   *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                    *
 *  GNU General Public License for more details.                                     *
 *                                                                                   *
 *  You should have received a copy of the GNU General Public License                *
 *  along with this program; if not, write to the Free Software                      *
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA   *
 *************************************************************************************/

#include "kalgebra.h"
#include "varedit.h"
#include "consolehtml.h"
#include "dictionary.h"
#include "askname.h"
#include "variablesdelegate.h"
#include "viewportwidget.h"
#include "functionedit.h"
#ifdef HAVE_OPENGL
#   include <analitzagui//plotsview3d.h>
#endif

#include <analitzagui/operatorsmodel.h>
#include <analitzagui/expressionedit.h>
#include <analitzagui/variablesmodel.h>
#include <analitzagui/plotsview2d.h>
#include <analitzaplot/plotsmodel.h>
#include <analitzaplot/functiongraph.h>
#include <analitzaplot/planecurve.h>
#include <analitza/variables.h>
#include <analitza/value.h>

#include <QVBoxLayout>
#include <QHeaderView>
#include <QDockWidget>
#include <QTableView>
#include <QPrinter>
#include <KAction>
#include <KHTMLView>
#include <KHelpMenu>
#include <KFileDialog>
#include <KMenu>
#include <KMenuBar>
#include <KStatusBar>
#include <KLocale>
#include <KStandardAction>
#include <KProcess>
#include <KRecentFilesAction>
#include <KApplication>
#include <KToggleFullScreenAction>
#include <kabstractfilewidget.h>
#include <analitzaplot/plotsfactory.h>

class Add2DOption : public InlineOptions
{
    public:
        Add2DOption(KAlgebra* c)
        : m_kalgebra(c)
        {}
        
        virtual QString id() const { return "add2d"; }
        virtual bool matchesExpression(const Analitza::Expression& exp, const Analitza::ExpressionType& functype) const {
            return Analitza::PlotsFactory::self()->requestPlot(exp, Analitza::Dim2D).canDraw();
        }

        virtual QString caption() const { return i18n("Plot 2D"); }

        virtual void triggerOption(const Analitza::Expression& exp) { m_kalgebra->add2D(exp); }
    
    private:
        KAlgebra* m_kalgebra;
};

#ifdef HAVE_OPENGL
class Add3DOption : public InlineOptions
{
    public:
        Add3DOption(KAlgebra* c)
        : m_kalgebra(c)
        {}
        
        virtual QString id() const { return "add3d"; }
        virtual bool matchesExpression(const Analitza::Expression& exp, const Analitza::ExpressionType& functype) const
        {
            return Analitza::PlotsFactory::self()->requestPlot(exp, Analitza::Dim3D).canDraw();
        }

        virtual QString caption() const { return i18n("Plot 3D"); }

        virtual void triggerOption(const Analitza::Expression& exp) { m_kalgebra->add3D(exp); }
    
    private:
        KAlgebra* m_kalgebra;
};
#endif

QColor randomFunctionColor() { return QColor::fromHsv(qrand()%255, 255, 255); }

KAlgebra::KAlgebra(QWidget *parent) : KMainWindow(parent)
{
    resize(900, 500);
    
    m_tabs = new QTabWidget;
    setCentralWidget(m_tabs);
    
    setStatusBar(new KStatusBar(this));
    setMenuBar(new KMenuBar(this));
    
    KToggleFullScreenAction* fullScreenAction = KStandardAction::fullScreen(this, SLOT(fullScreen(bool)), this, this);
    
    QMenu* g_menu = menuBar()->addMenu(i18n("Session"));
    g_menu->addAction(KStandardAction::openNew(this, SLOT(newInstance()), this));
    g_menu->addAction(fullScreenAction);
    g_menu->addAction(KStandardAction::quit(this, SLOT(close()), this));
    
    QToolButton* fullScreenButton = new QToolButton(this);
    fullScreenButton->setDefaultAction(fullScreenAction);
    m_tabs->setCornerWidget(fullScreenButton);
    
    m_status = new QLabel(this);
    statusBar()->insertWidget(0, m_status);
    menuBar()->addMenu("|")->setEnabled(false);
    
    QWidget *console = new QWidget(m_tabs);
    QVBoxLayout *c_layo = new QVBoxLayout(console);
    c_results = new ConsoleHtml(console);
    c_results->setFocusPolicy(Qt::NoFocus);
    c_dock_vars = new QDockWidget(i18n("Variables"), this);
    c_dock_vars->setFeatures(QDockWidget::DockWidgetFloatable|QDockWidget::DockWidgetMovable);
    addDockWidget(Qt::RightDockWidgetArea, c_dock_vars);
    
    c_varsModel=new Analitza::VariablesModel(c_results->analitza()->variables());
    c_varsModel->setEditable(false);
    
    c_variables = new QTreeView(c_dock_vars);
    c_variables->setModel(c_varsModel);
    c_variables->setRootIsDecorated(false);
    c_variables->header()->setStretchLastSection(true);
    c_variables->setSelectionBehavior(QAbstractItemView::SelectRows);
    c_variables->setSelectionMode(QAbstractItemView::SingleSelection);
    
    c_exp = new Analitza::ExpressionEdit(console);
    c_exp->setAnalitza(c_results->analitza());
    c_exp->setExamples(QStringList() << "square:=x->x**2" << "fib:=n->piecewise { eq(n,0)?0, eq(n,1)?1, ?fib(n-1)+fib(n-2) }");
    c_dock_vars->setWidget(c_variables);
    
    m_tabs->addTab(console, i18n("&Console"));
    console->setLayout(c_layo);
    c_layo->addWidget(c_results);
    c_layo->addWidget(c_exp);
    
    connect(c_exp, SIGNAL(returnPressed()), this, SLOT(operate()));
    connect(c_results, SIGNAL(status(QString)), this, SLOT(changeStatusBar(QString)));
    connect(c_results, SIGNAL(changed()), this, SLOT(updateInformation()));
    connect(c_results, SIGNAL(changed()), c_exp, SLOT(updateCompleter()));
    connect(c_results, SIGNAL(paste(QString)), c_exp, SLOT(insertText(QString)));
    connect(c_variables, SIGNAL(clicked(QModelIndex)), this, SLOT(edit_var(QModelIndex)));
    c_menu = menuBar()->addMenu(i18n("C&onsole"));
    
    c_menu->addAction(KIcon("document-open"), i18nc("@item:inmenu", "&Load Script..."),
                        this, SLOT(loadScript()), Qt::CTRL+Qt::Key_L);
    c_recentScripts=new KRecentFilesAction(KIcon("document-open-recent"), i18n("Recent Scripts"), this);
    connect(c_recentScripts, SIGNAL(urlSelected(KUrl)), this, SLOT(loadScript(KUrl)));
    c_menu->addAction(c_recentScripts);
    
    c_menu->addAction(KIcon("document-save"), i18nc("@item:inmenu", "&Save Script..."),
                        this, SLOT(saveScript()), Qt::CTRL+Qt::Key_G);
    c_menu->addAction(KIcon("document-save"), i18nc("@item:inmenu", "&Export Log..."),
                        this, SLOT(saveLog()), QKeySequence::Save);
    c_menu->addSeparator()->setText(i18n("Execution Mode"));
    QActionGroup *execGroup = new QActionGroup(c_menu);
    QAction* calc = c_menu->addAction(i18nc("@item:inmenu", "Calculate"), this, SLOT(consoleCalculate()));
    QAction* eval = c_menu->addAction(i18nc("@item:inmenu", "Evaluate"), this, SLOT(consoleEvaluate()));
    
    calc->setCheckable(true);
    eval->setCheckable(true);
    eval->setChecked(true);
    execGroup->addAction(calc);
    execGroup->addAction(eval);
    c_menu->addSeparator();
    c_menu->addAction(KStandardAction::clear(c_results, SLOT(clear()), this));
    initializeRecentScripts();
    
    b_funcsModel=new Analitza::PlotsModel(this);
    
    m_graph2d = new Analitza::PlotsView2D(m_tabs);
    m_graph2d->setTicksShown(0);
    m_graph2d->setModel(b_funcsModel);
    
    b_dock_funcs = new QDockWidget(i18n("Functions"), this);
    b_tools = new QTabWidget(b_dock_funcs);
    b_tools->setTabPosition(QTabWidget::South);
    addDockWidget(Qt::RightDockWidgetArea, b_dock_funcs);
    
    b_funcs = new QTreeView(b_tools);
    b_funcs->setRootIsDecorated(false);
    b_funcs->setModel(b_funcsModel);
    b_funcs->header()->resizeSections(QHeaderView::ResizeToContents);
    b_funcs->setSelectionMode(QAbstractItemView::SingleSelection);
    m_graph2d->setSelectionModel(b_funcs->selectionModel());
    
    b_tools->addTab(b_funcs, i18n("List"));
    
    b_funced = new FunctionEdit(b_tools);
    b_funced->setVariables(c_varsModel->variables());
    connect(b_funced, SIGNAL(accept()), this, SLOT(new_func()));
    connect(b_funced, SIGNAL(removeEditingPlot()), this, SLOT(remove_func()));
    b_tools->addTab(b_funced, KIcon("list-add"), i18n("&Add"));
    
    QTableView* b_varsView=new QTableView(b_tools);
    b_varsModel=new Analitza::VariablesModel(b_funced->variables());
    b_varsView->setModel(b_varsModel);
    b_varsView->setShowGrid(false);
    b_varsView->verticalHeader()->hide();
    b_varsView->horizontalHeader()->setStretchLastSection(true);
    b_varsView->setSelectionBehavior(QAbstractItemView::SelectRows);
    b_varsView->setContextMenuPolicy(Qt::CustomContextMenu);
    VariablesDelegate* delegate=new VariablesDelegate(b_varsView);
    b_varsView->setItemDelegate(delegate);
    b_tools->addTab(b_varsView, i18n("Variables"));
    
    ViewportWidget* b_viewport = new ViewportWidget(this);
    b_viewport->setViewport(m_graph2d->definedViewport());
    b_tools->addTab(b_viewport, i18n("Viewport"));
    
    b_dock_funcs->setWidget(b_tools);
    b_dock_funcs->setFeatures(QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetMovable);
    m_tabs->addTab(m_graph2d, i18n("&2D Graph"));
    c_results->addOptionsObserver(new Add2DOption(this));
    
    connect(b_varsModel, SIGNAL(dataChanged(QModelIndex,QModelIndex)), SLOT(valueChanged()));
    connect(b_funcs, SIGNAL(doubleClicked(QModelIndex)), this, SLOT(edit_func(QModelIndex)));
    connect(b_tools, SIGNAL(currentChanged(int)), this, SLOT(functools(int)));
    connect(m_graph2d, SIGNAL(status(QString)), this, SLOT(changeStatusBar(QString)));
    connect(m_graph2d, SIGNAL(viewportChanged(QRectF)), b_viewport, SLOT(setViewport(QRectF)));
    connect(b_viewport, SIGNAL(viewportChange(QRectF)), m_graph2d, SLOT(changeViewport(QRectF)));
    connect(b_varsView, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(varsContextMenu(QPoint)));
    
    b_menu = menuBar()->addMenu(i18n("2&D Graph"));
    QAction* b_actions[6];
    b_actions[0] = b_menu->addAction(i18n("&Grid"), this, SLOT(toggleSquares()));
    b_actions[1] = b_menu->addAction(i18n("&Keep Aspect Ratio"), this, SLOT(toggleKeepAspect()));
    b_menu->addAction(KStandardAction::save(this, SLOT(saveGraph()), this));
    b_menu->addSeparator();
    b_menu->addAction(KStandardAction::zoomIn(m_graph2d, SLOT(zoomIn()), this));
    b_menu->addAction(KStandardAction::zoomOut(m_graph2d, SLOT(zoomOut()), this));
    KAction* ac=KStandardAction::actualSize(m_graph2d, SLOT(resetViewport()), this);
    ac->setShortcut(Qt::ControlModifier + Qt::Key_0);
    b_menu->addAction(ac);
    b_menu->addSeparator()->setText(i18n("Resolution"));
    b_actions[2] = b_menu->addAction(i18nc("@item:inmenu", "Poor"), this, SLOT(set_res_low()));
    b_actions[3] = b_menu->addAction(i18nc("@item:inmenu", "Normal"), this, SLOT(set_res_std()));
    b_actions[4] = b_menu->addAction(i18nc("@item:inmenu", "Fine"), this, SLOT(set_res_fine()));
    b_actions[5] = b_menu->addAction(i18nc("@item:inmenu", "Very Fine"), this, SLOT(set_res_vfine()));
    m_graph2d->setContextMenuPolicy(Qt::ActionsContextMenu);
    m_graph2d->addActions(b_menu->actions());
    
    QActionGroup *res = new QActionGroup(b_menu);
    res->addAction(b_actions[2]);
    res->addAction(b_actions[3]);
    res->addAction(b_actions[4]);
    res->addAction(b_actions[5]);
    
    b_actions[0]->setCheckable(true);
    b_actions[0]->setChecked(true);
    b_actions[1]->setCheckable(true);
    b_actions[1]->setChecked(true);
    b_actions[2]->setCheckable(true);
    b_actions[3]->setCheckable(true);
    b_actions[3]->setChecked(true);
    b_actions[4]->setCheckable(true);
    b_actions[5]->setCheckable(true);
    set_res_std();
    
#ifdef HAVE_OPENGL
    QWidget *tridim = new QWidget(m_tabs);
    QVBoxLayout *t_layo = new QVBoxLayout(tridim);
    t_exp = new Analitza::ExpressionEdit(tridim);
    t_exp->setExamples(QStringList() << "sin x+sin y" << "(x,y)->x" << "x*y");
    t_exp->setAns("x");
    t_model3d = new Analitza::PlotsModel(this);
    m_graph3d = new Analitza::PlotsView3D(tridim);
    m_graph3d->setModel(t_model3d);
    m_graph3d->setUseSimpleRotation(true);
    
    tridim->setLayout(t_layo);
    m_tabs->addTab(tridim, i18n("&3D Graph"));
    t_layo->addWidget(m_graph3d);
    t_layo->addWidget(t_exp);
    
    connect(t_exp,  SIGNAL(returnPressed()), this, SLOT(new_func3d()));
    c_results->addOptionsObserver(new Add3DOption(this));
    
    t_menu = menuBar()->addMenu(i18n("3D &Graph"));
    QAction* t_actions[5];
    t_menu->addAction(KStandardAction::save(this, SLOT(save3DGraph()), this));
    t_menu->addAction(KIcon("zoom-original"), i18n("&Reset View"), m_graph3d, SLOT(resetView()));
    t_menu->addSeparator();
    t_actions[2] = t_menu->addAction(i18n("Dots"), this, SLOT(set_dots()));
    t_actions[3] = t_menu->addAction(i18n("Lines"), this, SLOT(set_lines()));
    t_actions[4] = t_menu->addAction(i18n("Solid"), this, SLOT(set_solid()));
    
    QActionGroup *t_type = new QActionGroup(t_menu);
    t_type->addAction(t_actions[2]);
    t_type->addAction(t_actions[3]);
    t_type->addAction(t_actions[4]);
    
    t_actions[2]->setCheckable(true);
    t_actions[3]->setCheckable(true);
    t_actions[4]->setCheckable(true);
    t_actions[4]->setChecked(true);
#endif
    menuBar()->addMenu("|")->setEnabled(false);
    
    //Dictionary tab
    d_dock = new QDockWidget(i18n("Operations"), this);
    d_dock->setFeatures(QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetMovable);
    addDockWidget(Qt::RightDockWidgetArea, d_dock);
    Dictionary *dic = new Dictionary(m_tabs);
    m_tabs->addTab(dic, i18n("&Dictionary"));
    
    QWidget *w=new QWidget;
    QLayout *leftLayo=new QVBoxLayout(w);
    d_filter=new KLineEdit(w);
    d_filter->setClearButtonShown(true);
    d_filter->setSizePolicy(QSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed));
    connect(d_filter, SIGNAL(textChanged(QString)), dic, SLOT(setFilter(QString)));
    connect(d_filter, SIGNAL(textChanged(QString)), this, SLOT(dictionaryFilterChanged(QString)));
    d_list = new QListView(w);
    d_list->setModel(dic->model());
    d_list->setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding));
    leftLayo->addWidget(new QLabel(i18n("Look for:"), d_dock));
    leftLayo->addWidget(d_filter);
    leftLayo->addWidget(d_list);
    d_dock->setWidget(w);
    
    connect(d_list->selectionModel(), SIGNAL(currentChanged(QModelIndex,QModelIndex)),
        dic, SLOT(activated(QModelIndex,QModelIndex)));
    
    //EODictionary
    //Ego's reminder
    KHelpMenu* help = new KHelpMenu(this, KGlobal::mainComponent().aboutData());
    menuBar()->addMenu(help->menu());

#ifdef __GNUC__
#warning TODO: Port to PlotsModel
#endif
//  connect(b_funcsModel, SIGNAL(functionModified(QString,Analitza::Expression)),
//          c_results, SLOT(modifyVariable(QString,Analitza::Expression)));
//  connect(b_funcsModel, SIGNAL(functionRemoved(QString)),
//          c_results, SLOT(removeVariable(QString)));
    
    connect(m_tabs, SIGNAL(currentChanged(int)), this, SLOT(tabChanged(int)));
    tabChanged(0);
}

KAlgebra::~KAlgebra()
{
    KConfig conf("kalgebrarc");
    KConfigGroup config(&conf, "Default");
    QStringList urls;
    foreach(const KUrl& url, c_recentScripts->urls())
        urls += url.prettyUrl();
    
    config.writeEntry("recent", urls);
}

void KAlgebra::initializeRecentScripts()
{
    KConfig conf("kalgebrarc");
    KConfigGroup config(&conf, "Default");
    
    QStringList urls=config.readEntry("recent", QStringList());
    foreach(const QString& url, urls) {
        c_recentScripts->addUrl(KUrl(url));
    }
}

void KAlgebra::newInstance()
{
    KProcess::startDetached(QApplication::applicationFilePath());
}

void KAlgebra::add2D(const Analitza::Expression& exp)
{
    qDebug() << "adding" << exp.toString();
    
    Analitza::PlotBuilder req = Analitza::PlotsFactory::self()->requestPlot(exp, Analitza::Dim2D, c_results->analitza()->variables());
    Analitza::PlotItem* curve = req.create(randomFunctionColor(), b_funcsModel->freeId());
    b_funcsModel->addPlot(curve);
    
    m_tabs->setCurrentIndex(1);
}

void KAlgebra::new_func()
{
    Analitza::FunctionGraph* f=b_funced->createFunction();
    
    if(b_funced->editing()) {
        QModelIndex idx = b_funcsModel->indexForName(f->name());
        b_funcsModel->updatePlot(idx.row(), f);
    } else {
        b_funcsModel->addPlot(f);
    }
    
    b_funced->setEditing(false);
    b_funced->clear();
    b_tools->setCurrentIndex(0);
    b_funcs->setCurrentIndex(b_funcsModel->indexForName(f->name()));
    m_graph2d->setFocus();
}

void KAlgebra::remove_func()
{
    Q_ASSERT(b_funced->editing());
    b_funcsModel->removeRow(b_funcs->currentIndex().row());
    
    b_funced->setEditing(false);
    b_funced->clear();
    b_tools->setCurrentIndex(0);
    b_funcs->setCurrentIndex(QModelIndex());
    m_graph2d->setFocus();
}

void KAlgebra::edit_func(const QModelIndex &idx)
{
    b_tools->setTabText(1, i18n("&Editing"));
    b_tools->setCurrentIndex(1);
    b_funced->setName(b_funcsModel->data(idx.sibling(idx.row(), 0)).toString());
    b_funced->setFunction(b_funcsModel->data(idx.sibling(idx.row(), 1)).toString());
    b_funced->setEditing(true);
    b_funced->setFocus();
}

void KAlgebra::functools(int i)
{
    if(i==0)
        b_tools->setTabText(1, i18n("&Add"));
    else {
        b_funced->setName(b_funcsModel->freeId());
        b_funced->setColor(randomFunctionColor());
        b_funced->setEditing(false);
        b_funced->setFocus();
    }
}

void KAlgebra::edit_var(const QModelIndex &idx)
{
    if(idx.column()==0) {
        c_exp->insertText(idx.data().toString());
    } else {
        QModelIndex idxName=idx.sibling(idx.row(), 0);
        
        QPointer<VarEdit> e(new VarEdit(this, false));
        QString var = c_variables->model()->data(idxName, Qt::DisplayRole).toString();
        
        e->setAnalitza(c_results->analitza());
        e->setName(var);
        
        if(e->exec() == QDialog::Accepted) {
            QString str=var+" := "+e->val().toString();
            c_results->addOperation(Analitza::Expression(str, false), str);
        }
        delete e;
    }
}

void KAlgebra::operate()
{
    if(!c_exp->text().isEmpty()){
        c_exp->setCorrect(c_results->addOperation(c_exp->expression(), c_exp->toPlainText()));
        c_exp->selectAll();
    }
}

void KAlgebra::changeStatusBar(const QString& msg)
{
//  statusBar()->showMessage(msg);
    m_status->setText(msg);
}

void KAlgebra::loadScript()
{
    KUrl path = KFileDialog::getOpenUrl(KUrl(), "*.kal|"+i18n("Script (*.kal)"), this, i18n("Choose a script"));
    
    if(!path.isEmpty())
        loadScript(path);
}

void KAlgebra::loadScript(const KUrl& path)
{
    bool loaded=c_results->loadScript(path);
    
    if(loaded)
        c_recentScripts->addUrl(path);
}

void KAlgebra::saveScript()
{
    KUrl path = KFileDialog::getSaveUrl(KUrl(), "*.kal|"+i18n("Script (*.kal)"), this, QString(), KFileDialog::ConfirmOverwrite);
    bool loaded=false;
    if(!path.isEmpty())
        loaded=c_results->saveScript(path);
    
    if(loaded)
        c_recentScripts->addUrl(path);
}

void KAlgebra::saveLog()
{
    KUrl path = KFileDialog::getSaveUrl(KUrl(), "*.html|"+i18n("HTML File (*.html)"), this, QString(), KFileDialog::ConfirmOverwrite);
    if(!path.isEmpty())
        c_results->saveLog(path);
}

void KAlgebra::set_res_low()    { b_funcsModel->setResolution(416); }
void KAlgebra::set_res_std()    { b_funcsModel->setResolution(832); }
void KAlgebra::set_res_fine()   { b_funcsModel->setResolution(1664);}
void KAlgebra::set_res_vfine()  { b_funcsModel->setResolution(3328);}

void KAlgebra::new_func3d()
{
#ifdef HAVE_OPENGL
    Analitza::Expression exp = t_exp->expression();
    Analitza::PlotBuilder plot = Analitza::PlotsFactory::self()->requestPlot(exp, Analitza::Dim3D, c_results->analitza()->variables());
    if(plot.canDraw()) {
        t_model3d->clear();
        t_model3d->addPlot(plot.create(Qt::yellow, "func3d"));
    } else
        changeStatusBar(i18n("Errors: %1", plot.errors().join(i18n(", "))));
#endif
}

void KAlgebra::set_dots()
{
#ifdef HAVE_OPENGL
    m_graph3d->setPlotStyle(Analitza::Dots);
#endif
}

void KAlgebra::set_lines()
{
#ifdef HAVE_OPENGL
    m_graph3d->setPlotStyle(Analitza::Wired);
#endif
}

void KAlgebra::set_solid()
{
#ifdef HAVE_OPENGL
    m_graph3d->setPlotStyle(Analitza::Solid);
#endif
}

void KAlgebra::save3DGraph()
{
#ifdef HAVE_OPENGL
    QString path = KFileDialog::getSaveFileName(KUrl(), i18n("*.png|PNG File\n*.pdf|PDF Document"), this, QString(), KFileDialog::ConfirmOverwrite);
    if(!path.isEmpty()) {
        QPixmap px = m_graph3d->renderPixmap();
        if(path.endsWith(".pdf")) {
            QPrinter printer;
            printer.setOutputFormat(QPrinter::PdfFormat);
            printer.setOutputFileName(path);
            printer.setPaperSize(px.size(), QPrinter::DevicePixel);
            printer.setPageMargins(0,0,0,0, QPrinter::DevicePixel);
            QPainter painter;
            painter.begin(&printer);
            painter.drawPixmap(QPoint(0,0), px);
            painter.end();
        } else {
            px.save(path);
        }
    }
#endif
}

void KAlgebra::toggleSquares()
{
    m_graph2d->setSquares(!m_graph2d->squares());
}

void KAlgebra::toggleKeepAspect()
{
    m_graph2d->setKeepAspectRatio(!m_graph2d->keepAspectRatio());
}

void KAlgebra::saveGraph()
{
    QPointer<KFileDialog> dialog=new KFileDialog(KUrl(), i18n("*.png|Image File\n*.svg|SVG File"), this);
    dialog->setOperationMode(KFileDialog::Saving);
    dialog->setConfirmOverwrite(true);
    
    if(dialog->exec()) {
        QString filter = dialog->fileWidget()->currentFilter();
        QString filename = dialog->selectedFile();
        
        bool isSvg = filename.endsWith(".svg") || (!filename.endsWith(".png") && filter.mid(2, 3)=="svg");
        Analitza::PlotsView2D::Format f = isSvg ? Analitza::PlotsView2D::PNG : Analitza::PlotsView2D::SVG;
        m_graph2d->toImage(filename, f);
    }
    delete dialog;
}

void menuEnabledHelper(QMenu* m, bool enabled)
{
    m->setEnabled(enabled);
    foreach(QAction* action, m->actions()) {
        action->setEnabled(enabled);
    }
}

void KAlgebra::tabChanged(int n)
{
    c_dock_vars->hide();
    b_dock_funcs->hide();
    d_dock->hide();
    
    menuEnabledHelper(c_menu, n==0);
    menuEnabledHelper(b_menu, n==1);
#ifdef HAVE_OPENGL
    menuEnabledHelper(t_menu, n==2);
#endif
    m_status->clear();
    
    switch(n) {
        case 0:
            c_dock_vars->show();
            c_dock_vars->raise();
            c_exp->setFocus();
            break;
        case 1:
            b_dock_funcs->show();
            b_dock_funcs->raise();
            
            if(b_funcsModel->rowCount()==0)
                b_tools->setCurrentIndex(1); //We set the Add tab
//          b_add->setFocus();
            break;
#ifdef HAVE_OPENGL
        case 2:
            t_exp->setFocus();
            break;
#endif
        case 3:
            d_filter->setFocus();
            d_dock->show();
            d_dock->raise();
        default:
            break;
    }
    changeStatusBar(i18nc("@info:status", "Ready"));
}

void KAlgebra::select(const QModelIndex & idx)
{
    b_funcs->selectionModel()->setCurrentIndex(idx, QItemSelectionModel::ClearAndSelect);
}

void KAlgebra::updateInformation()
{
    c_varsModel->updateInformation();
    c_variables->header()->resizeSections(QHeaderView::ResizeToContents);
}

void KAlgebra::consoleCalculate()
{
    c_results->setMode(ConsoleHtml::Calculation);
}

void KAlgebra::consoleEvaluate()
{
    c_results->setMode(ConsoleHtml::Evaluation);
}

void KAlgebra::valueChanged()
{
    //FIXME: Should only repaint the affected ones.
    if(b_funcsModel->rowCount()>0)
        m_graph2d->updateFunctions(QModelIndex(), 0, b_funcsModel->rowCount()-1);
}

void KAlgebra::varsContextMenu(const QPoint& p)
{
    QPointer<QMenu> m=new QMenu;
    m->addAction(i18n("Add variable"));
    QAction* ac=m->exec(b_dock_funcs->widget()->mapToGlobal(p));
    
    if(ac) {
        QPointer<AskName> a=new AskName(i18n("Enter a name for the new variable"), 0);
        
        if(a->exec()==QDialog::Accepted)
            b_varsModel->insertVariable(a->name(), Analitza::Expression(Analitza::Cn(0)));
        delete a;
    }
    delete m;
}

void KAlgebra::add3D(const Analitza::Expression& exp)
{
#ifdef HAVE_OPENGL
    t_model3d->clear();
    t_model3d->addPlot(Analitza::PlotsFactory::self()->requestPlot(exp, Analitza::Dim3D, c_results->analitza()->variables())
                                                     .create(Qt::yellow, "func3d_console"));
    m_tabs->setCurrentIndex(2);
#endif
}

void KAlgebra::dictionaryFilterChanged(const QString&)
{
    if(d_list->model()->rowCount()==1)
        d_list->setCurrentIndex(d_list->model()->index(0,0));
}

void KAlgebra::fullScreen(bool isFull)
{
    m_tabs->setDocumentMode(isFull);
    m_tabs->setTabEnabled(3, !isFull);
    if(isFull) {
        hide();
        m_tabs->setParent(0);
        setCentralWidget(0);
        m_tabs->showFullScreen();
    } else {
        setCentralWidget(m_tabs);
        show();
    }
}