Add abakus

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/abakus@1071969 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 825 insertions, 0 deletions

diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
new file mode 100644
index 0000000..8300dbb
--- /dev/null
+++ b/src/mainwindow.cpp
@@ -0,0 +1,825 @@
+/*
+ * mainwindow.cpp - part of abakus
+ * Copyright (C) 2004, 2005 Michael Pyne <[email protected]>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02110-1301  USA
+ */
+#include "mainwindow.h"
+#include "abakuscommon.h"
+
+#include <kaccel.h>
+#include <kmenubar.h>
+#include <kaction.h>
+#include <kstdaction.h>
+#include <kshortcut.h>
+#include <kdebug.h>
+#include <kconfig.h>
+#include <kglobal.h>
+#include <kconfigbase.h>
+#include <kactionclasses.h>
+#include <kinputdialog.h>
+
+#include <qlayout.h>
+#include <qvbox.h>
+#include <qhbox.h>
+#include <qradiobutton.h>
+#include <qbuttongroup.h>
+#include <qsplitter.h>
+
+#include "editor.h"
+#include "evaluator.h"
+#include "function.h"
+#include "resultlistview.h"
+#include "resultlistviewtext.h"
+#include "valuemanager.h"
+#include "node.h"
+#include "rpnmuncher.h"
+#include "dcopIface.h"
+#include "abakuslistview.h"
+#include "result.h"
+
+MainWindow::MainWindow() : KMainWindow(0, "abakus-mainwindow"), m_popup(0), m_insert(false)
+{
+    m_mainSplitter = new QSplitter(this);
+    QWidget *box = new QWidget(m_mainSplitter);
+    QVBoxLayout *layout = new QVBoxLayout(box);
+    m_layout = layout;
+    layout->setSpacing(6);
+    layout->setMargin(6);
+
+    QWidget *configBox = new QWidget(box);
+    layout->addWidget(configBox);
+
+    QHBoxLayout *configLayout = new QHBoxLayout(configBox);
+
+    configLayout->addWidget(new QWidget(configBox));
+
+    QLabel *label = new QLabel(i18n("History: "), configBox);
+    label->setAlignment(AlignCenter);
+    configLayout->addWidget(label);
+
+    QButtonGroup *buttonGroup = new QButtonGroup(0);
+
+    QWidget *buttonGroupBox = new QWidget(configBox);
+    QHBoxLayout *buttonGroupLayout = new QHBoxLayout(buttonGroupBox);
+    buttonGroupLayout->addStretch(0);
+
+    configLayout->addWidget(buttonGroupBox);
+
+    m_degrees = new QRadioButton(i18n("&Degrees"), buttonGroupBox);
+    buttonGroup->insert(m_degrees);
+    buttonGroupLayout->addWidget(m_degrees);
+    slotDegrees();
+    connect(m_degrees, SIGNAL(clicked()), SLOT(slotDegrees()));
+
+    m_radians = new QRadioButton(i18n("&Radians"), buttonGroupBox);
+    buttonGroup->insert(m_radians);
+    buttonGroupLayout->addWidget(m_radians);
+    connect(m_radians, SIGNAL(clicked()), SLOT(slotRadians()));
+
+    m_history = new QVBox(box);
+    layout->addWidget(m_history);
+    m_history->setSpacing(6);
+    m_history->setMargin(0);
+
+    m_result = new ResultListView(m_history);
+    m_result->setSelectionMode(QListView::NoSelection);
+    m_result->setHScrollBarMode(ResultListView::AlwaysOff);
+    connect(m_result, SIGNAL(signalEntrySelected(const QString &)),
+                      SLOT(slotEntrySelected(const QString &)));
+    connect(m_result, SIGNAL(signalResultSelected(const QString &)),
+                      SLOT(slotResultSelected(const QString &)));
+
+    m_history->setStretchFactor(m_result, 1);
+    layout->setStretchFactor(m_history, 1);
+
+    QHBox *editBox = new QHBox(box);
+    layout->addWidget(editBox);
+    editBox->setSpacing(6);
+
+    m_edit = new Editor(editBox);
+    m_edit->setFocus();
+    editBox->setStretchFactor(m_edit, 1);
+
+    KPushButton *evalButton = new KPushButton(i18n("&Evaluate"), editBox);
+
+    connect(evalButton, SIGNAL(clicked()), SLOT(slotEvaluate()));
+
+    connect(m_edit, SIGNAL(returnPressed()), SLOT(slotReturnPressed()));
+    connect(m_edit, SIGNAL(textChanged()), SLOT(slotTextChanged()));
+
+    m_listSplitter = new QSplitter(Vertical, m_mainSplitter);
+    m_fnList = new FunctionListView(m_listSplitter);
+    m_fnList->addColumn("Functions");
+    m_fnList->addColumn("Value");
+
+    m_varList = new VariableListView(m_listSplitter);
+    m_varList->addColumn("Variables");
+    m_varList->addColumn("Value");
+
+    connect(FunctionManager::instance(), SIGNAL(signalFunctionAdded(const QString &)),
+            this, SLOT(slotNewFunction(const QString &)));
+    connect(FunctionManager::instance(), SIGNAL(signalFunctionRemoved(const QString &)),
+            this, SLOT(slotRemoveFunction(const QString &)));
+
+    connect(ValueManager::instance(), SIGNAL(signalValueAdded(const QString &, Abakus::number_t)),
+            this, SLOT(slotNewValue(const QString &, Abakus::number_t)));
+    connect(ValueManager::instance(), SIGNAL(signalValueChanged(const QString &, Abakus::number_t)),
+            this, SLOT(slotChangeValue(const QString &, Abakus::number_t)));
+    connect(ValueManager::instance(), SIGNAL(signalValueRemoved(const QString &)),
+            this, SLOT(slotRemoveValue(const QString &)));
+
+    setupLayout();
+
+    setCentralWidget(m_mainSplitter);
+
+#if KDE_IS_VERSION(3,4,89)
+    setupGUI(QSize(450, 400), Keys | StatusBar | Save | Create);
+#else
+    setupGUI(Keys | StatusBar | Save | Create);
+#endif
+
+    m_dcopInterface = new AbakusIface();
+}
+
+bool MainWindow::inRPNMode() const
+{
+    return action<KToggleAction>("toggleExpressionMode")->isChecked();
+}
+
+bool MainWindow::eventFilter(QObject *o, QEvent *e)
+{
+    return KMainWindow::eventFilter(o, e);
+}
+
+bool MainWindow::queryExit()
+{
+    saveConfig();
+    return KMainWindow::queryExit();
+}
+
+void MainWindow::contextMenuEvent(QContextMenuEvent *e)
+{
+    static KPopupMenu *popup = 0;
+
+    if(!popup) {
+        popup = new KPopupMenu(this);
+        action("options_show_menubar")->plug(popup);
+    }
+
+    if(!action<KToggleAction>("options_show_menubar")->isChecked())
+        popup->popup(e->globalPos());
+}
+
+void MainWindow::polish()
+{
+    KMainWindow::polish();
+    loadConfig();
+}
+
+void MainWindow::slotReturnPressed()
+{
+    QString text = m_edit->text();
+
+    text.replace("\n", "");
+
+    m_edit->appendHistory(text);
+
+    // Item to insert after
+    ResultListViewText *after = m_result->lastItem();
+
+    // Expand $foo references.
+    QString str = interpolateExpression(text, after);
+
+    QString resultVal;
+    ResultListViewText *item;
+
+    if(str.isNull())
+        return; // Error already has been posted
+
+    m_insert = false; // Assume we failed
+
+    if(inRPNMode()) {
+        // We're in RPN mode.
+        Abakus::number_t result = RPNParser::rpnParseString(str);
+
+        if(!RPNParser::wasError()) {
+            resultVal = result.toString();
+            ValueManager::instance()->setValue("ans", result);
+            m_insert = true;
+        }
+        else {
+            m_insert = false;
+            resultVal = i18n("Error: %1").arg(RPNParser::errorString());
+        }
+
+        // Skip creating list view items if in compact mode.
+        if(!m_history->isShown()) {
+            m_edit->setText(resultVal);
+            QTimer::singleShot(0, m_edit, SLOT(selectAll()));
+
+            return;
+        }
+
+        item = new ResultListViewText(m_result, str, resultVal, after, false);
+    }
+    else {
+
+        // Check to see if it's just a function name, if so, add (ans).
+        if(FunctionManager::instance()->isFunction(str))
+            str += " ans";
+
+        // Add right parentheses as needed to balance out the expression.
+        int parenLevel = getParenthesesLevel(str);
+        for(int i = 0; i < parenLevel; ++i)
+            str += ')';
+
+        Abakus::number_t result = parseString(str.latin1());
+
+        bool compact = !m_history->isShown();
+
+        switch(Result::lastResult()->type()) {
+            case Result::Value:
+                resultVal = result.toString();
+
+                ValueManager::instance()->setValue("ans", result);
+                if(!compact)
+                    item = new ResultListViewText(m_result, str, result, after, false);
+
+                m_insert = true;
+            break;
+
+            case Result::Null: // OK, no result to speak of
+                resultVal = "OK";
+                if(!compact)
+                    item = new ResultListViewText(m_result, str, resultVal, after, true);
+            break;
+
+            default:
+                resultVal = Result::lastResult()->message();
+                if(!compact)
+                    item = new ResultListViewText(m_result, str, resultVal, after, true);
+        }
+
+        // Skip creating list view items if in compact mode.
+        if(compact) {
+            m_edit->setText(resultVal);
+            QTimer::singleShot(0, m_edit, SLOT(selectAll()));
+
+            return;
+        }
+    }
+
+    m_edit->setText(text);
+
+    m_result->setCurrentItem(item);
+    m_result->ensureItemVisible(item);
+
+    QTimer::singleShot(0, m_edit, SLOT(selectAll()));
+}
+
+void MainWindow::slotTextChanged()
+{
+    QString str = m_edit->text();
+
+    if(str.length() == 1 && m_insert) {
+        m_insert = false;
+
+        // Don't do anything if in RPN Mode.
+        if(inRPNMode())
+            return;
+
+        if(str.find(QRegExp("^[-+*/^]")) != -1) {
+            m_edit->setText("ans " + str + " ");
+            m_edit->moveCursor(QTextEdit::MoveEnd, false);
+        }
+    }
+}
+
+void MainWindow::slotEvaluate()
+{
+    slotReturnPressed();
+}
+
+void MainWindow::slotUpdateSize()
+{
+    if(m_newSize != QSize(0, 0))
+        resize(m_newSize);
+    else
+        resize(width(), minimumSize().height());
+}
+
+void MainWindow::slotDegrees()
+{
+    setTrigMode(Abakus::Degrees);
+    m_degrees->setChecked(true);
+    if(action("setDegreesMode"))
+        action<KToggleAction>("setDegreesMode")->setChecked(true);
+}
+
+void MainWindow::slotRadians()
+{
+    setTrigMode(Abakus::Radians);
+    m_radians->setChecked(true);
+    if(action("setRadiansMode"))
+        action<KToggleAction>("setRadiansMode")->setChecked(true);
+}
+
+int MainWindow::getParenthesesLevel(const QString &str)
+{
+    int level = 0;
+
+    for(unsigned i = 0; i < str.length(); ++i)
+        if(str[i] == '(')
+            ++level;
+        else if(str[i] == ')')
+            --level;
+
+    return level;
+}
+
+void MainWindow::loadConfig()
+{
+    {
+        KConfigGroup config(KGlobal::config(), "Settings");
+
+        QString mode = config.readEntry("Trigonometric mode", "Degrees");
+        if(mode == "Degrees") {
+            setTrigMode(Abakus::Degrees);
+            m_degrees->setChecked(true);
+        }
+        else {
+            setTrigMode(Abakus::Radians);
+            m_radians->setChecked(true);
+        }
+
+        bool useRPN = config.readBoolEntry("Use RPN Mode", false);
+        action<KToggleAction>("toggleExpressionMode")->setChecked(useRPN);
+
+        int precision = config.readNumEntry("Decimal Precision", -1);
+        if(precision < -1 || precision > 75)
+            precision = -1;
+
+        Abakus::m_prec = precision;
+        selectCorrectPrecisionAction();
+    }
+
+    {
+        KConfigGroup config(KGlobal::config(), "Variables");
+
+        QStringList list = config.readListEntry("Saved Variables");
+        for(QStringList::ConstIterator it = list.begin(); it != list.end(); ++it) {
+            QStringList values = QStringList::split('=', *it);
+            if(values.count() != 2) {
+                kdWarning() << "Your configuration file has somehow been corrupted!\n";
+                continue;
+            }
+
+            ValueManager::instance()->setValue(values[0], Abakus::number_t(values[1].latin1()));
+        }
+    }
+
+    {
+        KConfigGroup config(KGlobal::config(), "GUI");
+
+        bool showHistory = config.readBoolEntry("ShowHistory", true);
+        action<KToggleAction>("toggleHistoryList")->setChecked(showHistory);
+        m_history->setShown(showHistory);
+
+        bool showFunctions = config.readBoolEntry("ShowFunctions", true);
+        action<KToggleAction>("toggleFunctionList")->setChecked(showFunctions);
+        m_fnList->setShown(showFunctions);
+
+        bool showVariables = config.readBoolEntry("ShowVariables", true);
+        action<KToggleAction>("toggleVariableList")->setChecked(showVariables);
+        m_varList->setShown(showVariables);
+
+        bool compactMode = config.readBoolEntry("InCompactMode", false);
+        compactMode = compactMode || !showHistory;
+        action<KToggleAction>("toggleCompactMode")->setChecked(compactMode);
+
+        if(compactMode)
+            QTimer::singleShot(0, this, SLOT(slotToggleCompactMode()));
+    }
+
+    {
+        KConfigGroup config(KGlobal::config(), "Functions");
+
+        QStringList fnList = config.readListEntry("FunctionList");
+        for(QStringList::ConstIterator it = fnList.begin(); it != fnList.end(); ++it)
+            parseString(*it); // Run the function definitions through the parser
+    }
+
+    populateListViews();
+}
+
+void MainWindow::saveConfig()
+{
+    {
+        KConfigGroup config(KGlobal::config(), "Settings");
+
+        config.writeEntry("Trigonometric mode",
+             trigMode() == Abakus::Degrees
+             ? "Degrees"
+             : "Radians");
+
+        config.writeEntry("Use RPN Mode", inRPNMode());
+        config.writeEntry("Decimal Precision", Abakus::m_prec);
+    }
+
+    {
+        KConfigGroup config(KGlobal::config(), "Variables");
+
+        QStringList list;
+        QStringList values = ValueManager::instance()->valueNames();
+        QStringList::ConstIterator it = values.begin();
+
+        // Set precision to max for most accuracy
+        Abakus::m_prec = 75;
+
+        for(; it != values.end(); ++it) {
+            if(ValueManager::instance()->isValueReadOnly(*it))
+                continue;
+
+            list += QString("%1=%2")
+                        .arg(*it)
+                        .arg(ValueManager::instance()->value(*it).toString());
+        }
+
+        config.writeEntry("Saved Variables", list);
+    }
+
+    {
+        KConfigGroup config(KGlobal::config(), "GUI");
+        bool inCompactMode = action<KToggleAction>("toggleCompactMode")->isChecked();
+
+        config.writeEntry("InCompactMode", inCompactMode);
+
+        if(!inCompactMode) {
+            config.writeEntry("ShowHistory", m_history->isShown());
+            config.writeEntry("ShowFunctions", m_fnList->isShown());
+            config.writeEntry("ShowVariables", m_varList->isShown());
+        }
+        else {
+            config.writeEntry("ShowHistory", m_wasHistoryShown);
+            config.writeEntry("ShowFunctions", m_wasFnShown);
+            config.writeEntry("ShowVariables", m_wasVarShown);
+        }
+    }
+
+    {
+        KConfigGroup config(KGlobal::config(), "Functions");
+
+        FunctionManager *manager = FunctionManager::instance();
+
+        QStringList userFunctions = manager->functionList(FunctionManager::UserDefined);
+        QStringList saveList;
+
+        for(QStringList::ConstIterator it = userFunctions.begin(); it != userFunctions.end(); ++it) {
+            UnaryFunction *fn = dynamic_cast<UnaryFunction *>(manager->function(*it)->userFn->fn);
+            QString var = manager->function(*it)->userFn->varName;
+            QString expr = fn->operand()->infixString();
+
+            saveList += QString("set %1(%2) = %3").arg(*it).arg(var).arg(expr);
+        }
+
+        config.writeEntry("FunctionList", saveList);
+    }
+}
+
+void MainWindow::setupLayout()
+{
+    KActionCollection *ac = actionCollection();
+
+    KStdAction::quit(kapp, SLOT(quit()), ac);
+    KStdAction::showMenubar(this, SLOT(slotToggleMenuBar()), ac);
+
+    KToggleAction *ta = new KToggleAction(i18n("&Degrees"), SHIFT + ALT + Key_D, this, SLOT(slotDegrees()), ac, "setDegreesMode");
+    ta->setExclusiveGroup("TrigMode");
+    ta->setChecked(trigMode() == Abakus::Degrees);
+
+    ta = new KToggleAction(i18n("&Radians"), SHIFT + ALT + Key_R, this, SLOT(slotRadians()), ac, "setRadiansMode");
+    ta->setExclusiveGroup("TrigMode");
+    ta->setChecked(trigMode() == Abakus::Radians);
+
+    ta = new KToggleAction(i18n("Show &History List"), SHIFT + ALT + Key_H, this, SLOT(slotToggleHistoryList()), ac, "toggleHistoryList");
+    ta->setChecked(true);
+
+    ta = new KToggleAction(i18n("Show &Variables"), SHIFT + ALT + Key_V, this, SLOT(slotToggleVariableList()), ac, "toggleVariableList");
+    ta->setChecked(true);
+
+    ta = new KToggleAction(i18n("Show &Functions"), SHIFT + ALT + Key_F, this, SLOT(slotToggleFunctionList()), ac, "toggleFunctionList");
+    ta->setChecked(true);
+
+    ta = new KToggleAction(i18n("Activate &Compact Mode"), SHIFT + ALT + Key_C, this, SLOT(slotToggleCompactMode()), ac, "toggleCompactMode");
+    ta->setChecked(false);
+
+    ta = new KToggleAction(i18n("Use R&PN Mode"), SHIFT + ALT + Key_P, this, SLOT(slotToggleExpressionMode()), ac, "toggleExpressionMode");
+    ta->setChecked(false);
+
+    // Precision actions.
+    ta = new KToggleAction(i18n("&Automatic Precision"), 0, this, SLOT(slotPrecisionAuto()), ac, "precisionAuto");
+    ta->setExclusiveGroup("Precision");
+    ta->setChecked(true);
+
+    ta = new KToggleAction(i18n("&3 Decimal Digits"), 0, this, SLOT(slotPrecision3()), ac, "precision3");
+    ta->setExclusiveGroup("Precision");
+    ta->setChecked(false);
+
+    ta = new KToggleAction(i18n("&8 Decimal Digits"), 0, this, SLOT(slotPrecision8()), ac, "precision8");
+    ta->setExclusiveGroup("Precision");
+    ta->setChecked(false);
+
+    ta = new KToggleAction(i18n("&15 Decimal Digits"), 0, this, SLOT(slotPrecision15()), ac, "precision15");
+    ta->setExclusiveGroup("Precision");
+    ta->setChecked(false);
+
+    ta = new KToggleAction(i18n("&50 Decimal Digits"), 0, this, SLOT(slotPrecision50()), ac, "precision50");
+    ta->setExclusiveGroup("Precision");
+    ta->setChecked(false);
+
+    ta = new KToggleAction(i18n("C&ustom Precision..."), 0, this, SLOT(slotPrecisionCustom()), ac, "precisionCustom");
+    ta->setExclusiveGroup("Precision");
+    ta->setChecked(false);
+
+    new KAction(i18n("Clear &History"), "editclear", SHIFT + ALT + Key_L, m_result, SLOT(clear()), ac, "clearHistory");
+
+    new KAction(i18n("Select Editor"), "goto", Key_F6, m_edit, SLOT(setFocus()), ac, "select_edit");
+}
+
+void MainWindow::populateListViews()
+{
+    QStringList values = ValueManager::instance()->valueNames();
+
+    Abakus::number_t value = ValueManager::instance()->value("pi");
+    new ValueListViewItem(m_varList, "pi", value);
+
+    value = ValueManager::instance()->value("e");
+    new ValueListViewItem(m_varList, "e", value);
+}
+
+KAction *MainWindow::action(const char *key) const
+{
+    return actionCollection()->action(key);
+}
+
+void MainWindow::slotEntrySelected(const QString &text)
+{
+    m_edit->setText(text);
+    m_edit->moveCursor(QTextEdit::MoveEnd, false);
+}
+
+void MainWindow::slotResultSelected(const QString &text)
+{
+    m_edit->insert(text);
+}
+
+void MainWindow::slotToggleMenuBar()
+{
+    menuBar()->setShown(!menuBar()->isShown());
+}
+
+void MainWindow::slotToggleFunctionList()
+{
+    bool show = action<KToggleAction>("toggleFunctionList")->isChecked();
+    m_fnList->setShown(show);
+
+    if(!m_history->isShown()) {
+        m_history->setShown(true);
+        action<KToggleAction>("toggleHistoryList")->setChecked(true);
+        slotToggleHistoryList();
+    }
+
+    action<KToggleAction>("toggleCompactMode")->setChecked(false);
+}
+
+void MainWindow::slotToggleVariableList()
+{
+    bool show = action<KToggleAction>("toggleVariableList")->isChecked();
+    m_varList->setShown(show);
+
+    if(!m_history->isShown()) {
+        m_history->setShown(true);
+        action<KToggleAction>("toggleHistoryList")->setChecked(true);
+        slotToggleHistoryList();
+    }
+
+    action<KToggleAction>("toggleCompactMode")->setChecked(false);
+}
+
+void MainWindow::slotToggleHistoryList()
+{
+    bool show = action<KToggleAction>("toggleHistoryList")->isChecked();
+    m_history->setShown(show);
+
+    action<KToggleAction>("toggleCompactMode")->setChecked(false);
+}
+
+void MainWindow::slotNewFunction(const QString &name)
+{
+    UserFunction *userFn = FunctionManager::instance()->function(name)->userFn;
+    UnaryFunction *fn = dynamic_cast<UnaryFunction *>(userFn->fn);
+    QString fnName = QString("%1(%2)").arg(name, userFn->varName);
+    QString expr = fn->operand()->infixString();
+
+    new KListViewItem(m_fnList, fnName, expr);
+}
+
+void MainWindow::slotRemoveFunction(const QString &name)
+{
+    UserFunction *userFn = FunctionManager::instance()->function(name)->userFn;
+    QString fnName = QString("%1(%2)").arg(name, userFn->varName);
+
+    QListViewItem *item = 0;
+    while((item = m_fnList->findItem(fnName, 0)) != 0)
+        delete item;
+}
+
+void MainWindow::slotNewValue(const QString &name, Abakus::number_t value)
+{
+    new ValueListViewItem(m_varList, name, value);
+}
+
+void MainWindow::slotChangeValue(const QString &name, Abakus::number_t value)
+{
+    ValueListViewItem *item = static_cast<ValueListViewItem *>(m_varList->findItem(name, 0));
+
+    if(item)
+        item->valueChanged(value);
+}
+
+void MainWindow::slotRemoveValue(const QString &name)
+{
+    delete m_varList->findItem(name, 0);
+}
+
+void MainWindow::slotToggleCompactMode()
+{
+    if(action<KToggleAction>("toggleCompactMode")->isChecked()) {
+        m_wasFnShown = m_fnList->isShown();
+        m_wasVarShown = m_varList->isShown();
+        m_wasHistoryShown = m_history->isShown();
+
+        m_fnList->setShown(false);
+        m_varList->setShown(false);
+        m_history->setShown(false);
+
+        action<KToggleAction>("toggleFunctionList")->setChecked(false);
+        action<KToggleAction>("toggleVariableList")->setChecked(false);
+        action<KToggleAction>("toggleHistoryList")->setChecked(false);
+
+        m_oldSize = size();
+        m_newSize = QSize(0, 0);
+        QTimer::singleShot(0, this, SLOT(slotUpdateSize()));
+    }
+    else {
+        m_fnList->setShown(m_wasFnShown);
+        m_varList->setShown(m_wasVarShown);
+        m_history->setShown(m_wasHistoryShown);
+
+        action<KToggleAction>("toggleFunctionList")->setChecked(m_wasFnShown);
+        action<KToggleAction>("toggleVariableList")->setChecked(m_wasVarShown);
+        action<KToggleAction>("toggleHistoryList")->setChecked(m_wasHistoryShown);
+
+        m_newSize = m_oldSize;
+        QTimer::singleShot(0, this, SLOT(slotUpdateSize()));
+    }
+}
+
+void MainWindow::slotToggleExpressionMode()
+{
+}
+
+QString MainWindow::interpolateExpression(const QString &text, ResultListViewText *after)
+{
+    QString str(text);
+    QRegExp stackRE("\\$\\d+");
+    int pos;
+
+    while((pos = stackRE.search(str)) != -1) {
+        QString stackStr = stackRE.cap();
+        Abakus::number_t value;
+        unsigned numPos = stackStr.mid(1).toUInt();
+
+        if(!m_result->getStackValue(numPos, value)) {
+            new ResultListViewText(m_result, text, i18n("Marker %1 isn't set").arg(stackStr), after, true);
+            return QString::null;
+        }
+
+        str.replace(pos, stackStr.length(), value.toString());
+    }
+
+    return str;
+}
+
+void MainWindow::slotPrecisionAuto()
+{
+    Abakus::m_prec = -1;
+    redrawResults();
+}
+
+void MainWindow::slotPrecision3()
+{
+    Abakus::m_prec = 3;
+    redrawResults();
+}
+
+void MainWindow::slotPrecision8()
+{
+    Abakus::m_prec = 8;
+    redrawResults();
+}
+
+void MainWindow::slotPrecision15()
+{
+    Abakus::m_prec = 15;
+    redrawResults();
+}
+
+void MainWindow::slotPrecision50()
+{
+    Abakus::m_prec = 50;
+    redrawResults();
+}
+
+void MainWindow::slotPrecisionCustom()
+{
+    bool ok = false;
+    int precision = KInputDialog::getInteger(i18n("Select number of decimal digits to display"),
+            i18n("Decimal precision:"), Abakus::m_prec, 0, 75, 1, &ok, this);
+
+    if(ok) {
+        Abakus::m_prec = precision;
+        redrawResults();
+    }
+
+    selectCorrectPrecisionAction();
+}
+
+void MainWindow::redrawResults()
+{
+    QListViewItemIterator it(m_result);
+
+    while(it.current()) {
+        static_cast<ResultListViewText *>(it.current())->precisionChanged();
+        ++it;
+    }
+
+    it = QListViewItemIterator (m_varList);
+
+    while(it.current()) {
+        static_cast<ValueListViewItem *>(it.current())->valueChanged();
+        ++it;
+    }
+
+    // Because of the way we implemented the menu, it is possible to deselect
+    // every possibility, so make sure we have at least one selected.
+    selectCorrectPrecisionAction();
+}
+
+// This function selects the correct precision action based on the value of
+// Abakus::m_prec.  Useful for loading settings, or for custom precision
+// selection.
+void MainWindow::selectCorrectPrecisionAction()
+{
+    switch(Abakus::m_prec) {
+        case 3:
+            action<KToggleAction>("precision3")->setChecked(true);
+        break;
+
+        case 8:
+            action<KToggleAction>("precision8")->setChecked(true);
+        break;
+
+        case 15:
+            action<KToggleAction>("precision15")->setChecked(true);
+        break;
+
+        case 50:
+            action<KToggleAction>("precision50")->setChecked(true);
+        break;
+
+        case -1:
+            action<KToggleAction>("precisionAuto")->setChecked(true);
+        break;
+
+        default:
+            action<KToggleAction>("precisionCustom")->setChecked(true);
+    }
+}
+
+#include "mainwindow.moc"
+
+// vim: set et ts=8 sw=4: