/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <rangelst.hxx>
#include <sfx2/bindings.hxx>
#include <svl/numformat.hxx>
#include <utility>
#include <vcl/commandinfoprovider.hxx>
#include <vcl/weld.hxx>
#include <vcl/svapp.hxx>

#include <reffact.hxx>
#include <docsh.hxx>
#include <docfunc.hxx>
#include <rangeutl.hxx>
#include <convuno.hxx>
#include <unonames.hxx>
#include <solveroptions.hxx>
#include <solverutil.hxx>
#include <globstr.hrc>
#include <scresid.hxx>
#include <comphelper/sequence.hxx>
#include <optsolver.hxx>
#include <table.hxx>

#include <com/sun/star/sheet/SolverConstraint.hpp>
#include <com/sun/star/sheet/SolverConstraintOperator.hpp>
#include <com/sun/star/sheet/XSolverDescription.hpp>
#include <com/sun/star/sheet/XSolver.hpp>

using namespace com::sun::star;

ScSolverProgressDialog::ScSolverProgressDialog(weld::Window* pParent)
    : GenericDialogController(pParent, u"modules/scalc/ui/solverprogressdialog.ui"_ustr,
                              u"SolverProgressDialog"_ustr)
    , m_xFtTime(m_xBuilder->weld_label(u"progress"_ustr))
{
}

ScSolverProgressDialog::~ScSolverProgressDialog()
{
}

void ScSolverProgressDialog::HideTimeLimit()
{
    m_xFtTime->hide();
}

void ScSolverProgressDialog::SetTimeLimit( sal_Int32 nSeconds )
{
    OUString aOld = m_xFtTime->get_label();
    OUString aNew = aOld.replaceFirst("#", OUString::number(nSeconds));
    m_xFtTime->set_label(aNew);
}

ScSolverNoSolutionDialog::ScSolverNoSolutionDialog(weld::Window* pParent, const OUString& rErrorText)
    : GenericDialogController(pParent, u"modules/scalc/ui/nosolutiondialog.ui"_ustr, u"NoSolutionDialog"_ustr)
    , m_xFtErrorText(m_xBuilder->weld_label(u"error"_ustr))
{
    m_xFtErrorText->set_label(rErrorText);
}

ScSolverNoSolutionDialog::~ScSolverNoSolutionDialog()
{
}

ScSolverSuccessDialog::ScSolverSuccessDialog(weld::Window* pParent, std::u16string_view rSolution)
    : GenericDialogController(pParent, u"modules/scalc/ui/solversuccessdialog.ui"_ustr, u"SolverSuccessDialog"_ustr)
    , m_xFtResult(m_xBuilder->weld_label(u"result"_ustr))
    , m_xBtnOk(m_xBuilder->weld_button(u"ok"_ustr))
    , m_xBtnCancel(m_xBuilder->weld_button(u"cancel"_ustr))
{
    m_xBtnOk->connect_clicked(LINK(this, ScSolverSuccessDialog, ClickHdl));
    m_xBtnCancel->connect_clicked(LINK(this, ScSolverSuccessDialog, ClickHdl));
    OUString aMessage = m_xFtResult->get_label() + " " + rSolution;
    m_xFtResult->set_label(aMessage);
}

ScSolverSuccessDialog::~ScSolverSuccessDialog()
{
}

IMPL_LINK(ScSolverSuccessDialog, ClickHdl, weld::Button&, rBtn, void)
{
    if (&rBtn == m_xBtnOk.get())
        m_xDialog->response(RET_OK);
    else
        m_xDialog->response(RET_CANCEL);
}

ScCursorRefEdit::ScCursorRefEdit(std::unique_ptr<weld::Entry> xControl)
    : formula::RefEdit(std::move(xControl))
{
    xEntry->connect_key_press(Link<const KeyEvent&, bool>()); //acknowledge we first remove the old one
    xEntry->connect_key_press(LINK(this, ScCursorRefEdit, KeyInputHdl));
}

void ScCursorRefEdit::SetCursorLinks( const Link<ScCursorRefEdit&,void>& rUp, const Link<ScCursorRefEdit&,void>& rDown )
{
    maCursorUpLink = rUp;
    maCursorDownLink = rDown;
}

IMPL_LINK(ScCursorRefEdit, KeyInputHdl, const KeyEvent&, rKEvt, bool)
{
    vcl::KeyCode aCode = rKEvt.GetKeyCode();
    bool bUp = (aCode.GetCode() == KEY_UP);
    bool bDown = (aCode.GetCode() == KEY_DOWN);
    if ( !aCode.IsShift() && !aCode.IsMod1() && !aCode.IsMod2() && ( bUp || bDown ) )
    {
        if ( bUp )
            maCursorUpLink.Call( *this );
        else
            maCursorDownLink.Call( *this );
        return true;
    }
    return formula::RefEdit::KeyInput(rKEvt);
}

ScOptSolverDlg::ScOptSolverDlg(SfxBindings* pB, SfxChildWindow* pCW, weld::Window* pParent,
                               ScDocShell* pDocSh, const ScAddress& aCursorPos)
    : ScAnyRefDlgController(pB, pCW, pParent, u"modules/scalc/ui/solverdlg.ui"_ustr, u"SolverDialog"_ustr)
    , maInputError(ScResId(STR_INVALIDINPUT))
    , maConditionError(ScResId(STR_INVALIDCONDITION))

    , mpDocShell(pDocSh)
    , mrDoc(pDocSh->GetDocument())
    , mnCurTab(aCursorPos.Tab())
    , mbDlgLostFocus(false)
    , nScrollPos(0)
    , mpEdActive(nullptr)
    , m_xFtObjectiveCell(m_xBuilder->weld_label(u"targetlabel"_ustr))
    , m_xEdObjectiveCell(new formula::RefEdit(m_xBuilder->weld_entry(u"targetedit"_ustr)))
    , m_xRBObjectiveCell(new formula::RefButton(m_xBuilder->weld_button(u"targetbutton"_ustr)))
    , m_xRbMax(m_xBuilder->weld_radio_button(u"max"_ustr))
    , m_xRbMin(m_xBuilder->weld_radio_button(u"min"_ustr))
    , m_xRbValue(m_xBuilder->weld_radio_button(u"value"_ustr))
    , m_xEdTargetValue(new formula::RefEdit(m_xBuilder->weld_entry(u"valueedit"_ustr)))
    , m_xRBTargetValue(new formula::RefButton(m_xBuilder->weld_button(u"valuebutton"_ustr)))
    , m_xFtVariableCells(m_xBuilder->weld_label(u"changelabel"_ustr))
    , m_xEdVariableCells(new formula::RefEdit(m_xBuilder->weld_entry(u"changeedit"_ustr)))
    , m_xRBVariableCells(new formula::RefButton(m_xBuilder->weld_button(u"changebutton"_ustr)))
    , m_xFtCellRef(m_xBuilder->weld_label(u"cellreflabel"_ustr))
    , m_xEdLeft1(new ScCursorRefEdit(m_xBuilder->weld_entry(u"ref1edit"_ustr)))
    , m_xRBLeft1(new formula::RefButton(m_xBuilder->weld_button(u"ref1button"_ustr)))
    , m_xLbOp1(m_xBuilder->weld_combo_box(u"op1list"_ustr))
    , m_xFtConstraint(m_xBuilder->weld_label(u"constraintlabel"_ustr))
    , m_xEdRight1(new ScCursorRefEdit(m_xBuilder->weld_entry(u"val1edit"_ustr)))
    , m_xRBRight1(new formula::RefButton(m_xBuilder->weld_button(u"val1button"_ustr)))
    , m_xBtnDel1(m_xBuilder->weld_button(u"del1"_ustr))
    , m_xEdLeft2(new ScCursorRefEdit(m_xBuilder->weld_entry(u"ref2edit"_ustr)))
    , m_xRBLeft2(new formula::RefButton(m_xBuilder->weld_button(u"ref2button"_ustr)))
    , m_xLbOp2(m_xBuilder->weld_combo_box(u"op2list"_ustr))
    , m_xEdRight2(new ScCursorRefEdit(m_xBuilder->weld_entry(u"val2edit"_ustr)))
    , m_xRBRight2(new formula::RefButton(m_xBuilder->weld_button(u"val2button"_ustr)))
    , m_xBtnDel2(m_xBuilder->weld_button(u"del2"_ustr))
    , m_xEdLeft3(new ScCursorRefEdit(m_xBuilder->weld_entry(u"ref3edit"_ustr)))
    , m_xRBLeft3(new formula::RefButton(m_xBuilder->weld_button(u"ref3button"_ustr)))
    , m_xLbOp3(m_xBuilder->weld_combo_box(u"op3list"_ustr))
    , m_xEdRight3(new ScCursorRefEdit(m_xBuilder->weld_entry(u"val3edit"_ustr)))
    , m_xRBRight3(new formula::RefButton(m_xBuilder->weld_button(u"val3button"_ustr)))
    , m_xBtnDel3(m_xBuilder->weld_button(u"del3"_ustr))
    , m_xEdLeft4(new ScCursorRefEdit(m_xBuilder->weld_entry(u"ref4edit"_ustr)))
    , m_xRBLeft4(new formula::RefButton(m_xBuilder->weld_button(u"ref4button"_ustr)))
    , m_xLbOp4(m_xBuilder->weld_combo_box(u"op4list"_ustr))
    , m_xEdRight4(new ScCursorRefEdit(m_xBuilder->weld_entry(u"val4edit"_ustr)))
    , m_xRBRight4(new formula::RefButton(m_xBuilder->weld_button(u"val4button"_ustr)))
    , m_xBtnDel4(m_xBuilder->weld_button(u"del4"_ustr))
    , m_xScrollBar(m_xBuilder->weld_scrolled_window(u"scrollbar"_ustr, true))
    , m_xBtnOpt(m_xBuilder->weld_button(u"options"_ustr))
    , m_xBtnClose(m_xBuilder->weld_button(u"close"_ustr))
    , m_xBtnSolve(m_xBuilder->weld_button(u"ok"_ustr))
    , m_xBtnResetAll(m_xBuilder->weld_button(u"resetall"_ustr))
    , m_xResultFT(m_xBuilder->weld_label(u"result"_ustr))
    , m_xContents(m_xBuilder->weld_widget(u"grid"_ustr))
    , m_pSolverSettings(mrDoc.FetchTable(mnCurTab)->GetSolverSettings())
{
    m_xEdObjectiveCell->SetReferences(this, m_xFtObjectiveCell.get());
    m_xRBObjectiveCell->SetReferences(this, m_xEdObjectiveCell.get());
    m_xEdTargetValue->SetReferences(this, m_xResultFT.get());
    m_xRBTargetValue->SetReferences(this, m_xEdTargetValue.get());
    m_xEdVariableCells->SetReferences(this, m_xFtVariableCells.get());
    m_xRBVariableCells->SetReferences(this, m_xEdVariableCells.get());
    m_xEdLeft1->SetReferences(this, m_xFtCellRef.get());
    m_xRBLeft1->SetReferences(this, m_xEdLeft1.get());
    m_xEdRight1->SetReferences(this, m_xFtConstraint.get());
    m_xRBRight1->SetReferences(this, m_xEdRight1.get());
    m_xEdLeft2->SetReferences(this, m_xFtCellRef.get());
    m_xRBLeft2->SetReferences(this, m_xEdLeft2.get());
    m_xEdRight2->SetReferences(this, m_xFtConstraint.get());
    m_xRBRight2->SetReferences(this, m_xEdRight2.get());
    m_xEdLeft3->SetReferences(this, m_xFtCellRef.get());
    m_xRBLeft3->SetReferences(this, m_xEdLeft3.get());
    m_xEdRight3->SetReferences(this, m_xFtConstraint.get());
    m_xRBRight3->SetReferences(this, m_xEdRight3.get());
    m_xEdLeft4->SetReferences(this, m_xFtCellRef.get());
    m_xRBLeft4->SetReferences(this, m_xEdLeft4.get());
    m_xEdRight4->SetReferences(this, m_xFtConstraint.get());
    m_xRBRight4->SetReferences(this, m_xEdRight4.get());

    mpLeftEdit[0]    = m_xEdLeft1.get();
    mpLeftButton[0]  = m_xRBLeft1.get();
    mpRightEdit[0]   = m_xEdRight1.get();
    mpRightButton[0] = m_xRBRight1.get();
    mpOperator[0]    = m_xLbOp1.get();
    mpDelButton[0]   = m_xBtnDel1.get();

    mpLeftEdit[1]    = m_xEdLeft2.get();
    mpLeftButton[1]  = m_xRBLeft2.get();
    mpRightEdit[1]   = m_xEdRight2.get();
    mpRightButton[1] = m_xRBRight2.get();
    mpOperator[1]    = m_xLbOp2.get();
    mpDelButton[1]   = m_xBtnDel2.get();

    mpLeftEdit[2]    = m_xEdLeft3.get();
    mpLeftButton[2]  = m_xRBLeft3.get();
    mpRightEdit[2]   = m_xEdRight3.get();
    mpRightButton[2] = m_xRBRight3.get();
    mpOperator[2]    = m_xLbOp3.get();
    mpDelButton[2]   = m_xBtnDel3.get();

    mpLeftEdit[3]    = m_xEdLeft4.get();
    mpLeftButton[3]  = m_xRBLeft4.get();
    mpRightEdit[3]   = m_xEdRight4.get();
    mpRightButton[3] = m_xRBRight4.get();
    mpOperator[3]    = m_xLbOp4.get();
    mpDelButton[3]   = m_xBtnDel4.get();

    Init( aCursorPos );
}

ScOptSolverDlg::~ScOptSolverDlg()
{
}

void ScOptSolverDlg::Init(const ScAddress& rCursorPos)
{
    uno::Reference<frame::XFrame> xFrame = GetBindings().GetActiveFrame();
    auto xDelNm = vcl::CommandInfoProvider::GetXGraphicForCommand(u".uno:DeleteRows"_ustr, xFrame);
    for (weld::Button* pButton : mpDelButton)
        pButton->set_image(xDelNm);

    m_xBtnOpt->connect_clicked( LINK( this, ScOptSolverDlg, BtnHdl ) );
    m_xBtnClose->connect_clicked( LINK( this, ScOptSolverDlg, BtnHdl ) );
    m_xBtnSolve->connect_clicked( LINK( this, ScOptSolverDlg, BtnHdl ) );
    m_xBtnResetAll->connect_clicked( LINK( this, ScOptSolverDlg, BtnHdl ) );

    Link<formula::RefEdit&,void> aEditLink = LINK( this, ScOptSolverDlg, GetEditFocusHdl );
    Link<formula::RefButton&,void> aButtonLink = LINK( this, ScOptSolverDlg, GetButtonFocusHdl );
    m_xEdObjectiveCell->SetGetFocusHdl( aEditLink );
    m_xRBObjectiveCell->SetGetFocusHdl( aButtonLink );
    m_xEdTargetValue->SetGetFocusHdl( aEditLink );
    m_xRBTargetValue->SetGetFocusHdl( aButtonLink );
    m_xEdVariableCells->SetGetFocusHdl( aEditLink );
    m_xRBVariableCells->SetGetFocusHdl( aButtonLink );
    Link<weld::Widget&,void> aLink = LINK(this, ScOptSolverDlg, GetFocusHdl);
    m_xRbValue->connect_focus_in(aLink);
    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )
    {
        mpLeftEdit[nRow]->SetGetFocusHdl( aEditLink );
        mpLeftButton[nRow]->SetGetFocusHdl( aButtonLink );
        mpRightEdit[nRow]->SetGetFocusHdl( aEditLink );
        mpRightButton[nRow]->SetGetFocusHdl( aButtonLink );
        mpOperator[nRow]->connect_focus_in(aLink);
    }

    aEditLink = LINK( this, ScOptSolverDlg, LoseEditFocusHdl );
    aButtonLink = LINK( this, ScOptSolverDlg, LoseButtonFocusHdl );
    m_xEdObjectiveCell->SetLoseFocusHdl( aEditLink );
    m_xRBObjectiveCell->SetLoseFocusHdl( aButtonLink );
    m_xEdTargetValue->SetLoseFocusHdl( aEditLink );
    m_xRBTargetValue-> SetLoseFocusHdl( aButtonLink );
    m_xEdVariableCells->SetLoseFocusHdl( aEditLink );
    m_xRBVariableCells->SetLoseFocusHdl( aButtonLink );
    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )
    {
        mpLeftEdit[nRow]->SetLoseFocusHdl( aEditLink );
        mpLeftButton[nRow]->SetLoseFocusHdl( aButtonLink );
        mpRightEdit[nRow]->SetLoseFocusHdl( aEditLink );
        mpRightButton[nRow]->SetLoseFocusHdl( aButtonLink );
    }

    Link<ScCursorRefEdit&,void> aCursorUp = LINK( this, ScOptSolverDlg, CursorUpHdl );
    Link<ScCursorRefEdit&,void> aCursorDown = LINK( this, ScOptSolverDlg, CursorDownHdl );
    Link<formula::RefEdit&,void> aCondModify = LINK( this, ScOptSolverDlg, CondModifyHdl );
    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )
    {
        mpLeftEdit[nRow]->SetCursorLinks( aCursorUp, aCursorDown );
        mpRightEdit[nRow]->SetCursorLinks( aCursorUp, aCursorDown );
        mpLeftEdit[nRow]->SetModifyHdl( aCondModify );
        mpRightEdit[nRow]->SetModifyHdl( aCondModify );
        mpDelButton[nRow]->connect_clicked( LINK( this, ScOptSolverDlg, DelBtnHdl ) );
        mpOperator[nRow]->connect_changed( LINK( this, ScOptSolverDlg, SelectHdl ) );
    }
    m_xEdTargetValue->SetModifyHdl( LINK( this, ScOptSolverDlg, TargetModifyHdl ) );

    Size aSize(m_xContents->get_preferred_size());
    m_xContents->set_size_request(aSize.Width(), aSize.Height());
    m_xScrollBar->connect_vadjustment_changed( LINK( this, ScOptSolverDlg, ScrollHdl ) );

    m_xScrollBar->vadjustment_set_page_increment( EDIT_ROW_COUNT );
    m_xScrollBar->vadjustment_set_page_size( EDIT_ROW_COUNT );
    // Range is set in ShowConditions

    // get available solver implementations
    //! sort by descriptions?
    ScSolverUtil::GetImplementations( maImplNames, maDescriptions );

    // Load existing settings stored in the tab
    LoadSolverSettings();
    ShowConditions();

    // If no objective cell has been loaded, then use the selected cell
    if (m_xEdObjectiveCell->GetText().isEmpty())
    {
        OUString aCursorStr;
        if (!mrDoc.GetRangeAtBlock(ScRange(rCursorPos), aCursorStr))
            aCursorStr = rCursorPos.Format(ScRefFlags::ADDR_ABS, nullptr, mrDoc.GetAddressConvention());
        m_xEdObjectiveCell->SetRefString(aCursorStr);
    }

    m_xEdObjectiveCell->GrabFocus();
    mpEdActive = m_xEdObjectiveCell.get();
}

void ScOptSolverDlg::ReadConditions()
{
    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )
    {
        sc::ModelConstraint aRowEntry;
        aRowEntry.aLeftStr = mpLeftEdit[nRow]->GetText();
        aRowEntry.aRightStr = mpRightEdit[nRow]->GetText();
        aRowEntry.nOperator = OperatorIndexToConstraintOperator(mpOperator[nRow]->get_active());

        tools::Long nVecPos = nScrollPos + nRow;
        if ( nVecPos >= static_cast<tools::Long>(m_aConditions.size()) && !aRowEntry.IsDefault() )
            m_aConditions.resize( nVecPos + 1 );

        if ( nVecPos < static_cast<tools::Long>(m_aConditions.size()) )
            m_aConditions[nVecPos] = std::move(aRowEntry);

        // remove default entries at the end
        size_t nSize = m_aConditions.size();
        while ( nSize > 0 && m_aConditions[ nSize-1 ].IsDefault() )
            --nSize;
        m_aConditions.resize( nSize );
    }
}

void ScOptSolverDlg::ShowConditions()
{
    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )
    {
        sc::ModelConstraint aRowEntry;

        tools::Long nVecPos = nScrollPos + nRow;
        if ( nVecPos < static_cast<tools::Long>(m_aConditions.size()) )
            aRowEntry = m_aConditions[nVecPos];

        mpLeftEdit[nRow]->SetRefString( aRowEntry.aLeftStr );
        mpRightEdit[nRow]->SetRefString( aRowEntry.aRightStr );
        mpOperator[nRow]->set_active( aRowEntry.nOperator - 1);
    }

    // allow to scroll one page behind the visible or stored rows
    tools::Long nVisible = nScrollPos + EDIT_ROW_COUNT;
    tools::Long nMax = std::max( nVisible, static_cast<tools::Long>(m_aConditions.size()) );
    m_xScrollBar->vadjustment_configure(nScrollPos, 0, nMax + EDIT_ROW_COUNT, 1,
                                        EDIT_ROW_COUNT - 1, EDIT_ROW_COUNT);

    EnableButtons();
}

void ScOptSolverDlg::EnableButtons()
{
    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )
    {
        tools::Long nVecPos = nScrollPos + nRow;
        mpDelButton[nRow]->set_sensitive(nVecPos < static_cast<tools::Long>(m_aConditions.size()));
    }
}

void ScOptSolverDlg::Close()
{
    if (m_xOptDlg)
        m_xOptDlg->response(RET_CANCEL);
    assert(!m_xOptDlg);
    DoClose( ScOptSolverDlgWrapper::GetChildWindowId() );
}

void ScOptSolverDlg::SetActive()
{
    if ( mbDlgLostFocus )
    {
        mbDlgLostFocus = false;
        if( mpEdActive )
            mpEdActive->GrabFocus();
    }
    else
    {
        m_xDialog->grab_focus();
    }
    RefInputDone();
}

void ScOptSolverDlg::SetReference( const ScRange& rRef, ScDocument& rDocP )
{
    if( !mpEdActive )
        return;

    if ( rRef.aStart != rRef.aEnd )
        RefInputStart(mpEdActive);

    // "target"/"value": single cell
    bool bSingle = ( mpEdActive == m_xEdObjectiveCell.get() || mpEdActive == m_xEdTargetValue.get() );

    OUString aStr;
    ScAddress aAdr = rRef.aStart;
    ScRange aNewRef( rRef );
    if ( bSingle )
        aNewRef.aEnd = aAdr;

    OUString aName;
    if ( rDocP.GetRangeAtBlock( aNewRef, aName ) )            // named range: show name
        aStr = aName;
    else                                                        // format cell/range reference
    {
        ScRefFlags nFmt = ( aAdr.Tab() == mnCurTab ) ? ScRefFlags::ADDR_ABS : ScRefFlags::ADDR_ABS_3D;
        if ( bSingle )
            aStr = aAdr.Format(nFmt, &rDocP, rDocP.GetAddressConvention());
        else
            aStr = rRef.Format(rDocP, nFmt | ScRefFlags::RANGE_ABS, rDocP.GetAddressConvention());
    }

    // variable cells can be several ranges, so only the selection is replaced
    if ( mpEdActive == m_xEdVariableCells.get() )
    {
        OUString aVal = mpEdActive->GetText();
        Selection aSel = mpEdActive->GetSelection();
        aSel.Normalize();
        aVal = aVal.replaceAt( aSel.Min(), aSel.Len(), aStr );
        Selection aNewSel( aSel.Min(), aSel.Min()+aStr.getLength() );
        mpEdActive->SetRefString( aVal );
        mpEdActive->SetSelection( aNewSel );
    }
    else
        mpEdActive->SetRefString( aStr );

    ReadConditions();
    EnableButtons();

    // select "Value of" if a ref is input into "target" edit
    if ( mpEdActive == m_xEdTargetValue.get() )
        m_xRbValue->set_active(true);
}

bool ScOptSolverDlg::IsRefInputMode() const
{
    return mpEdActive != nullptr;
}

// Loads solver settings into the dialog
void ScOptSolverDlg::LoadSolverSettings()
{
    m_xEdObjectiveCell->SetRefString(m_pSolverSettings->GetParameter(sc::SP_OBJ_CELL));
    m_xEdTargetValue->SetRefString(m_pSolverSettings->GetParameter(sc::SP_OBJ_VAL));
    m_xEdVariableCells->SetRefString(m_pSolverSettings->GetParameter(sc::SP_VAR_CELLS));

    // Objective type
    sc::ObjectiveType eType = m_pSolverSettings->GetObjectiveType();
    switch (eType)
    {
        case sc::OT_MAXIMIZE : m_xRbMax->set_active(true); break;
        case sc::OT_MINIMIZE : m_xRbMin->set_active(true); break;
        case sc::OT_VALUE    : m_xRbValue->set_active(true); break;
    }

    // Model constraints
    m_aConditions = m_pSolverSettings->GetConstraints();

    // Loads solver engine name
    // If the solver engine in the current settings are not supported, use the first available
    maEngine = m_pSolverSettings->GetParameter(sc::SP_LO_ENGINE);
    if (!IsEngineAvailable(maEngine))
    {
        maEngine = maImplNames[0];
        m_pSolverSettings->SetParameter(sc::SP_LO_ENGINE, maEngine);
    }

    // Query current engine options
    maProperties = ScSolverUtil::GetDefaults(maEngine);
    m_pSolverSettings->GetEngineOptions(maProperties);
}

// Set solver settings and save them to the file
// But first, checks if the settings have changed
void ScOptSolverDlg::SaveSolverSettings()
{
    // tdf#160104 If file does not have a solver model and the Solver dialog is set to its
    // default initial values (maximize is selected; no variable cells; no target value
    // and no constraints defined) then nothing needs to be saved
    if (!m_pSolverSettings->TabHasSolverModel() && m_xRbMax->get_active()
        && m_xEdTargetValue->GetText().isEmpty() && m_xEdVariableCells->GetText().isEmpty()
        && m_aConditions.size() == 0)
        return;

    // The current tab has a model; now we need to determined if it has been modified
    bool bModified = false;

    // Check objective cell, objective value and variable cells
    if (m_pSolverSettings->GetParameter(sc::SP_OBJ_CELL) != m_xEdObjectiveCell->GetText()
        || m_pSolverSettings->GetParameter(sc::SP_OBJ_VAL) != m_xEdTargetValue->GetText()
        || m_pSolverSettings->GetParameter(sc::SP_VAR_CELLS) != m_xEdVariableCells->GetText())
        bModified = true;

    // Check selected objective type and save it if changed
    sc::ObjectiveType aType = sc::OT_MAXIMIZE;
    if (m_xRbMin->get_active())
        aType = sc::OT_MINIMIZE;
    else if (m_xRbValue->get_active())
        aType = sc::OT_VALUE;

    if (m_pSolverSettings->GetObjectiveType() != aType)
        bModified = true;

    // Check if model constraints changed
    std::vector<sc::ModelConstraint> vCurConditions = m_pSolverSettings->GetConstraints();
    if (!bModified && vCurConditions.size() != m_aConditions.size())
        bModified = true;
    else
    {
        // Here the size of both vectors is the same
        // Now it needs to check the contents of the constraints
        for (size_t i = 0; i < vCurConditions.size(); i++)
        {
            if (vCurConditions[i].aLeftStr != m_aConditions[i].aLeftStr
                || vCurConditions[i].nOperator != m_aConditions[i].nOperator
                || vCurConditions[i].aRightStr != m_aConditions[i].aRightStr)
                bModified = true;

            if (bModified)
                break;
        }
    }

    // Check if the solver engine name and its options have changed
    if (m_pSolverSettings->GetParameter(sc::SP_LO_ENGINE) != maEngine)
    {
        bModified = true;
    }
    else
    {
        // The solver engine hasn't changed, so we need to check if engine options changed
        // Query current engine options; here we start by creating a copy of maProperties
        // to ensure the order is the same
        css::uno::Sequence<css::beans::PropertyValue> vCurOptions(maProperties);
        m_pSolverSettings->GetEngineOptions(vCurOptions);

        for (sal_Int32 i = 0; i < vCurOptions.getLength(); i++)
        {
            if (vCurOptions[i].Value != maProperties[i].Value)
            {
                bModified = true;
                break;
            }
        }
    }

    // Effectively save settings to file if modifications were made
    if (bModified)
    {
        m_pSolverSettings->SetParameter(sc::SP_OBJ_CELL, m_xEdObjectiveCell->GetText());
        m_pSolverSettings->SetParameter(sc::SP_OBJ_VAL, m_xEdTargetValue->GetText());
        m_pSolverSettings->SetParameter(sc::SP_VAR_CELLS, m_xEdVariableCells->GetText());
        m_pSolverSettings->SetObjectiveType(aType);
        m_pSolverSettings->SetConstraints(m_aConditions);
        m_pSolverSettings->SetParameter(sc::SP_LO_ENGINE, maEngine);
        m_pSolverSettings->SetEngineOptions(maProperties);
        m_pSolverSettings->SaveSolverSettings();
    }
}
// Test if a LO engine implementation exists
bool ScOptSolverDlg::IsEngineAvailable(std::u16string_view sEngineName)
{
    auto nIndex = comphelper::findValue(maImplNames, sEngineName);
    return nIndex != -1;
}

// Handler:

IMPL_LINK(ScOptSolverDlg, BtnHdl, weld::Button&, rBtn, void)
{
    auto xKeepAlive = shared_from_this();
    if (&rBtn == m_xBtnSolve.get() || &rBtn == m_xBtnClose.get())
    {
        bool bSolve = ( &rBtn == m_xBtnSolve.get() );

        SetDispatcherLock( false );
        SwitchToDocument();

        bool bClose = true;
        if ( bSolve )
            bClose = CallSolver();

        if ( bClose )
        {
            // Close: write dialog settings to DocShell for subsequent calls
            ReadConditions();
            SaveSolverSettings();
            response(RET_CLOSE);
        }
        else
        {
            // no solution -> dialog is kept open
            SetDispatcherLock( true );
        }
    }
    else if (&rBtn == m_xBtnOpt.get())
    {
        //! move options dialog to UI lib?
        m_xOptDlg = std::make_shared<ScSolverOptionsDialog>(m_xDialog.get(), maImplNames, maDescriptions, maEngine, maProperties);
        weld::DialogController::runAsync(m_xOptDlg, [this](sal_Int32 nResult){
            if (nResult == RET_OK)
            {
                maEngine = m_xOptDlg->GetEngine();
                maProperties = m_xOptDlg->GetProperties();
            }
            m_xOptDlg.reset();
        });
    }
    else if (&rBtn == m_xBtnResetAll.get())
    {
        OUString sEmpty;
        m_xEdObjectiveCell->SetText(sEmpty);
        m_xEdTargetValue->SetText(sEmpty);
        m_xEdVariableCells->SetText(sEmpty);

        // Get default property values of solver implementations
        maEngine = maImplNames[0];
        maProperties = ScSolverUtil::GetDefaults( maEngine );

        // Clear all conditions (Constraints)
        m_aConditions.clear();
        ShowConditions();

        m_xRbMax->set_active(true);
        m_xEdObjectiveCell->GrabFocus();
        mpEdActive = m_xEdObjectiveCell.get();
    }
}

IMPL_LINK( ScOptSolverDlg, GetEditFocusHdl, formula::RefEdit&, rCtrl, void )
{
    formula::RefEdit* pEdit = nullptr;
    mpEdActive = nullptr;

    if( &rCtrl == m_xEdObjectiveCell.get() )
        pEdit = mpEdActive = m_xEdObjectiveCell.get();
    else if( &rCtrl == m_xEdTargetValue.get() )
        pEdit = mpEdActive = m_xEdTargetValue.get();
    else if( &rCtrl == m_xEdVariableCells.get() )
        pEdit = mpEdActive = m_xEdVariableCells.get();
    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )
    {
        if( &rCtrl == mpLeftEdit[nRow]  )
            pEdit = mpEdActive = mpLeftEdit[nRow];
        else if( &rCtrl == mpRightEdit[nRow]  )
            pEdit = mpEdActive = mpRightEdit[nRow];
    }

    if( pEdit )
        pEdit->SelectAll();
}

IMPL_LINK( ScOptSolverDlg, GetButtonFocusHdl, formula::RefButton&, rCtrl, void )
{
    formula::RefEdit* pEdit = nullptr;
    mpEdActive = nullptr;

    if( &rCtrl == m_xRBObjectiveCell.get() )
        pEdit = mpEdActive = m_xEdObjectiveCell.get();
    else if( &rCtrl == m_xRBTargetValue.get() )
        pEdit = mpEdActive = m_xEdTargetValue.get();
    else if( &rCtrl == m_xRBVariableCells.get() )
        pEdit = mpEdActive = m_xEdVariableCells.get();
    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )
    {
        if( &rCtrl == mpLeftButton[nRow] )
            pEdit = mpEdActive = mpLeftEdit[nRow];
        else if( &rCtrl == mpRightButton[nRow] )
            pEdit = mpEdActive = mpRightEdit[nRow];
    }

    if( pEdit )
        pEdit->SelectAll();
}


IMPL_LINK(ScOptSolverDlg, GetFocusHdl, weld::Widget&, rCtrl, void)
{
    if( &rCtrl == m_xRbValue.get() )                   // focus on "Value of" radio button
        mpEdActive = m_xEdTargetValue.get();          // use value edit for ref input, but don't change selection
    else
    {
        for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )
        {
            if( &rCtrl == mpOperator[nRow] )    // focus on "operator" list box
                mpEdActive = mpRightEdit[nRow];     // use right edit for ref input, but don't change selection
        }
    }
}

IMPL_LINK_NOARG(ScOptSolverDlg, LoseEditFocusHdl, formula::RefEdit&, void)
{
    mbDlgLostFocus = !m_xDialog->has_toplevel_focus();
}

IMPL_LINK_NOARG(ScOptSolverDlg, LoseButtonFocusHdl, formula::RefButton&, void)
{
    mbDlgLostFocus = !m_xDialog->has_toplevel_focus();
}

IMPL_LINK(ScOptSolverDlg, DelBtnHdl, weld::Button&, rBtn, void)
{
    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )
        if (&rBtn == mpDelButton[nRow])
        {
            bool bHadFocus = rBtn.has_focus();

            ReadConditions();
            tools::Long nVecPos = nScrollPos + nRow;
            if ( nVecPos < static_cast<tools::Long>(m_aConditions.size()) )
            {
                m_aConditions.erase( m_aConditions.begin() + nVecPos );
                ShowConditions();

                if ( bHadFocus && !rBtn.get_sensitive() )
                {
                    // If the button is disabled, focus would normally move to the next control,
                    // (left edit of the next row). Move it to left edit of this row instead.

                    mpEdActive = mpLeftEdit[nRow];
                    mpEdActive->GrabFocus();
                }
            }
        }
}

IMPL_LINK_NOARG(ScOptSolverDlg, TargetModifyHdl, formula::RefEdit&, void)
{
    // modify handler for the target edit:
    //  select "Value of" if something is input into the edit
    if ( !m_xEdTargetValue->GetText().isEmpty() )
        m_xRbValue->set_active(true);
}

IMPL_LINK_NOARG(ScOptSolverDlg, CondModifyHdl, formula::RefEdit&, void)
{
    // modify handler for the condition edits, just to enable/disable "delete" buttons
    ReadConditions();
    EnableButtons();
}

IMPL_LINK_NOARG(ScOptSolverDlg, SelectHdl, weld::ComboBox&, void)
{
    // select handler for operator list boxes, just to enable/disable "delete" buttons
    ReadConditions();
    EnableButtons();
}

IMPL_LINK_NOARG(ScOptSolverDlg, ScrollHdl, weld::ScrolledWindow&, void)
{
    ReadConditions();
    nScrollPos = m_xScrollBar->vadjustment_get_value();
    ShowConditions();
    if( mpEdActive )
        mpEdActive->SelectAll();
}

IMPL_LINK( ScOptSolverDlg, CursorUpHdl, ScCursorRefEdit&, rEdit, void )
{
    if ( &rEdit == mpLeftEdit[0] || &rEdit == mpRightEdit[0] )
    {
        if ( nScrollPos > 0 )
        {
            ReadConditions();
            --nScrollPos;
            ShowConditions();
            if( mpEdActive )
                mpEdActive->SelectAll();
        }
    }
    else
    {
        formula::RefEdit* pFocus = nullptr;
        for ( sal_uInt16 nRow = 1; nRow < EDIT_ROW_COUNT; ++nRow )      // second row or below: move focus
        {
            if ( &rEdit == mpLeftEdit[nRow] )
                pFocus = mpLeftEdit[nRow-1];
            else if ( &rEdit == mpRightEdit[nRow] )
                pFocus = mpRightEdit[nRow-1];
        }
        if (pFocus)
        {
            mpEdActive = pFocus;
            pFocus->GrabFocus();
        }
    }
}

IMPL_LINK( ScOptSolverDlg, CursorDownHdl, ScCursorRefEdit&, rEdit, void )
{
    if ( &rEdit == mpLeftEdit[EDIT_ROW_COUNT-1] || &rEdit == mpRightEdit[EDIT_ROW_COUNT-1] )
    {
        //! limit scroll position?
        ReadConditions();
        ++nScrollPos;
        ShowConditions();
        if( mpEdActive )
            mpEdActive->SelectAll();
    }
    else
    {
        formula::RefEdit* pFocus = nullptr;
        for ( sal_uInt16 nRow = 0; nRow+1 < EDIT_ROW_COUNT; ++nRow )      // before last row: move focus
        {
            if ( &rEdit == mpLeftEdit[nRow] )
                pFocus = mpLeftEdit[nRow+1];
            else if ( &rEdit == mpRightEdit[nRow] )
                pFocus = mpRightEdit[nRow+1];
        }
        if (pFocus)
        {
            mpEdActive = pFocus;
            pFocus->GrabFocus();
        }
    }
}

// Converts the position of the operator in the dropdown menu to a ConstraintOperator type
sc::ConstraintOperator ScOptSolverDlg::OperatorIndexToConstraintOperator(sal_Int32 nIndex)
{
    switch(nIndex)
    {
        case 0  : return sc::CO_LESS_EQUAL; break;
        case 1  : return sc::CO_EQUAL; break;
        case 2  : return sc::CO_GREATER_EQUAL; break;
        case 3  : return sc::CO_INTEGER; break;
        case 4  : return sc::CO_BINARY; break;
        default : return sc::CO_LESS_EQUAL; break;
    }
}

void ScOptSolverDlg::ShowError( bool bCondition, formula::RefEdit* pFocus )
{
    OUString aMessage = bCondition ? maConditionError : maInputError;
    std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(m_xDialog.get(),
                                              VclMessageType::Warning, VclButtonsType::Ok,
                                              aMessage));
    xBox->run();
    if (pFocus)
    {
        mpEdActive = pFocus;
        pFocus->GrabFocus();
    }
}

bool ScOptSolverDlg::ParseRef( ScRange& rRange, const OUString& rInput, bool bAllowRange )
{
    ScAddress::Details aDetails(mrDoc.GetAddressConvention(), 0, 0);
    ScRefFlags nFlags = rRange.ParseAny( rInput, mrDoc, aDetails );
    if ( nFlags & ScRefFlags::VALID )
    {
        if ( (nFlags & ScRefFlags::TAB_3D) == ScRefFlags::ZERO)
            rRange.aStart.SetTab( mnCurTab );
        if ( (nFlags & ScRefFlags::TAB2_3D) == ScRefFlags::ZERO)
            rRange.aEnd.SetTab( rRange.aStart.Tab() );
        return ( bAllowRange || rRange.aStart == rRange.aEnd );
    }
    else if ( ScRangeUtil::MakeRangeFromName( rInput, mrDoc, mnCurTab, rRange, RUTL_NAMES, aDetails ) )
        return ( bAllowRange || rRange.aStart == rRange.aEnd );

    return false;   // not recognized
}

bool ScOptSolverDlg::FindTimeout( sal_Int32& rTimeout )
{
    bool bFound = false;

    if ( !maProperties.hasElements() )
        maProperties = ScSolverUtil::GetDefaults( maEngine );   // get property defaults from component

    sal_Int32 nPropCount = maProperties.getLength();
    for (sal_Int32 nProp=0; nProp<nPropCount && !bFound; ++nProp)
    {
        const beans::PropertyValue& rValue = maProperties[nProp];
        if ( rValue.Name == SC_UNONAME_TIMEOUT )
            bFound = ( rValue.Value >>= rTimeout );
    }
    return bFound;
}

bool ScOptSolverDlg::CallSolver()       // return true -> close dialog after calling
{
    // show progress dialog

    auto xProgress = std::make_shared<ScSolverProgressDialog>(m_xDialog.get());
    sal_Int32 nTimeout = 0;
    if ( FindTimeout( nTimeout ) )
        xProgress->SetTimeLimit( nTimeout );
    else
        xProgress->HideTimeLimit();

    weld::DialogController::runAsync(xProgress, [](sal_Int32 /*nResult*/){});

    // try to make sure the progress dialog is painted before continuing
    Application::Reschedule(true);

    // collect solver parameters

    ReadConditions();

    rtl::Reference<ScModelObj> xDocument( mpDocShell->GetModel() );

    ScRange aObjRange;
    if ( !ParseRef( aObjRange, m_xEdObjectiveCell->GetText(), false ) )
    {
        ShowError( false, m_xEdObjectiveCell.get() );
        return false;
    }
    table::CellAddress aObjective( aObjRange.aStart.Tab(), aObjRange.aStart.Col(), aObjRange.aStart.Row() );

    // "changing cells" can be several ranges
    ScRangeList aVarRanges;
    if ( !ParseWithNames( aVarRanges, m_xEdVariableCells->GetText(), mrDoc ) )
    {
        ShowError( false, m_xEdVariableCells.get() );
        return false;
    }
    uno::Sequence<table::CellAddress> aVariables;
    sal_Int32 nVarPos = 0;

    for ( size_t nRangePos=0, nRange = aVarRanges.size(); nRangePos < nRange; ++nRangePos )
    {
        ScRange aRange( aVarRanges[ nRangePos ] );
        aRange.PutInOrder();
        SCTAB nTab = aRange.aStart.Tab();

        // resolve into single cells

        sal_Int32 nAdd = ( aRange.aEnd.Col() - aRange.aStart.Col() + 1 ) *
                         ( aRange.aEnd.Row() - aRange.aStart.Row() + 1 );
        aVariables.realloc( nVarPos + nAdd );
        auto pVariables = aVariables.getArray();

        for (SCROW nRow = aRange.aStart.Row(); nRow <= aRange.aEnd.Row(); ++nRow)
            for (SCCOL nCol = aRange.aStart.Col(); nCol <= aRange.aEnd.Col(); ++nCol)
                pVariables[nVarPos++] = table::CellAddress( nTab, nCol, nRow );
    }

    uno::Sequence<sheet::SolverConstraint> aConstraints;
    sal_Int32 nConstrPos = 0;
    for ( const auto& rConstr : m_aConditions )
    {
        if ( !rConstr.aLeftStr.isEmpty() )
        {
            sheet::SolverConstraint aConstraint;
            // Order of list box entries must match enum values.
            // The enum SolverConstraintOperator starts at zero, whereas ConstraintOperator starts at 1
            // hence we need to subtract -1 here
            aConstraint.Operator = static_cast<sheet::SolverConstraintOperator>(rConstr.nOperator - 1);

            ScRange aLeftRange;
            if ( !ParseRef( aLeftRange, rConstr.aLeftStr, true ) )
            {
                ShowError( true, nullptr );
                return false;
            }

            bool bIsRange = false;
            ScRange aRightRange;
            if ( ParseRef( aRightRange, rConstr.aRightStr, true ) )
            {
                if ( aRightRange.aStart == aRightRange.aEnd )
                    aConstraint.Right <<= table::CellAddress( aRightRange.aStart.Tab(),
                                                              aRightRange.aStart.Col(), aRightRange.aStart.Row() );
                else if ( aRightRange.aEnd.Col()-aRightRange.aStart.Col() == aLeftRange.aEnd.Col()-aLeftRange.aStart.Col() &&
                          aRightRange.aEnd.Row()-aRightRange.aStart.Row() == aLeftRange.aEnd.Row()-aLeftRange.aStart.Row() )
                    bIsRange = true;    // same size as "left" range, resolve into single cells
                else
                {
                    ShowError( true, nullptr );
                    return false;
                }
            }
            else
            {
                sal_uInt32 nFormat = 0;     //! explicit language?
                double fValue = 0.0;
                if ( mrDoc.GetFormatTable()->IsNumberFormat( rConstr.aRightStr, nFormat, fValue ) )
                    aConstraint.Right <<= fValue;
                else if ( aConstraint.Operator != sheet::SolverConstraintOperator_INTEGER &&
                          aConstraint.Operator != sheet::SolverConstraintOperator_BINARY )
                {
                    ShowError( true, nullptr );
                    return false;
                }
            }

            // resolve into single cells

            sal_Int32 nAdd = ( aLeftRange.aEnd.Col() - aLeftRange.aStart.Col() + 1 ) *
                             ( aLeftRange.aEnd.Row() - aLeftRange.aStart.Row() + 1 );
            aConstraints.realloc( nConstrPos + nAdd );
            auto pConstraints = aConstraints.getArray();

            for (SCROW nRow = aLeftRange.aStart.Row(); nRow <= aLeftRange.aEnd.Row(); ++nRow)
                for (SCCOL nCol = aLeftRange.aStart.Col(); nCol <= aLeftRange.aEnd.Col(); ++nCol)
                {
                    aConstraint.Left = table::CellAddress( aLeftRange.aStart.Tab(), nCol, nRow );
                    if ( bIsRange )
                        aConstraint.Right <<= table::CellAddress( aRightRange.aStart.Tab(),
                            aRightRange.aStart.Col() + ( nCol - aLeftRange.aStart.Col() ),
                            aRightRange.aStart.Row() + ( nRow - aLeftRange.aStart.Row() ) );

                    pConstraints[nConstrPos++] = aConstraint;
                }
        }
    }

    bool bMaximize = m_xRbMax->get_active();
    if ( m_xRbValue->get_active() )
    {
        // handle "value of" with an additional constraint (and then minimize)

        sheet::SolverConstraint aConstraint;
        aConstraint.Left     = aObjective;
        aConstraint.Operator = sheet::SolverConstraintOperator_EQUAL;

        OUString aValStr = m_xEdTargetValue->GetText();
        ScRange aRightRange;
        if ( ParseRef( aRightRange, aValStr, false ) )
            aConstraint.Right <<= table::CellAddress( aRightRange.aStart.Tab(),
                                                      aRightRange.aStart.Col(), aRightRange.aStart.Row() );
        else
        {
            sal_uInt32 nFormat = 0;     //! explicit language?
            double fValue = 0.0;
            if ( mrDoc.GetFormatTable()->IsNumberFormat( aValStr, nFormat, fValue ) )
                aConstraint.Right <<= fValue;
            else
            {
                ShowError( false, m_xEdTargetValue.get() );
                return false;
            }
        }

        aConstraints.realloc( nConstrPos + 1 );
        aConstraints.getArray()[nConstrPos++] = std::move(aConstraint);
    }

    // copy old document values

    sal_Int32 nVarCount = aVariables.getLength();
    uno::Sequence<double> aOldValues( nVarCount );
    std::transform(std::cbegin(aVariables), std::cend(aVariables), aOldValues.getArray(),
        [this](const table::CellAddress& rVariable) -> double {
            ScAddress aCellPos;
            ScUnoConversion::FillScAddress( aCellPos, rVariable );
            return mrDoc.GetValue( aCellPos );
        });

    // create and initialize solver

    uno::Reference<sheet::XSolver> xSolver = ScSolverUtil::GetSolver( maEngine );
    OSL_ENSURE( xSolver.is(), "can't get solver component" );
    if ( !xSolver.is() )
        return false;

    xSolver->setDocument( xDocument );
    xSolver->setObjective( aObjective );
    xSolver->setVariables( aVariables );
    xSolver->setConstraints( aConstraints );
    xSolver->setMaximize( bMaximize );

    // set options
    uno::Reference<beans::XPropertySet> xOptProp(xSolver, uno::UNO_QUERY);
    if ( xOptProp.is() )
    {
        for (const beans::PropertyValue& rValue : maProperties)
        {
            try
            {
                xOptProp->setPropertyValue( rValue.Name, rValue.Value );
            }
            catch ( uno::Exception & )
            {
                OSL_FAIL("Exception in solver option property");
            }
        }
    }

    xSolver->solve();
    bool bSuccess = xSolver->getSuccess();

    xProgress->response(RET_CLOSE);

    bool bClose = false;
    bool bRestore = true;   // restore old values unless a solution is accepted
    if ( bSuccess )
    {
        // put solution into document so it is visible when asking
        uno::Sequence<double> aSolution = xSolver->getSolution();
        if ( aSolution.getLength() == nVarCount )
        {
            mpDocShell->LockPaint();
            ScDocFunc &rFunc = mpDocShell->GetDocFunc();
            for (nVarPos=0; nVarPos<nVarCount; ++nVarPos)
            {
                ScAddress aCellPos;
                ScUnoConversion::FillScAddress(aCellPos, aVariables[nVarPos]);
                rFunc.SetValueCell(aCellPos, aSolution[nVarPos], false);
            }
            mpDocShell->UnlockPaint();
        }
        //! else error?

        // take formatted result from document (result value from component is ignored)
        OUString aResultStr = mrDoc.GetString(
            static_cast<SCCOL>(aObjective.Column), static_cast<SCROW>(aObjective.Row),
            static_cast<SCTAB>(aObjective.Sheet));

        ScSolverSuccessDialog aDialog(m_xDialog.get(), aResultStr);
        if (aDialog.run() == RET_OK)
        {
            // keep results and close dialog
            bRestore = false;
            bClose = true;
        }
    }
    else
    {
        OUString aError;
        uno::Reference<sheet::XSolverDescription> xDesc( xSolver, uno::UNO_QUERY );
        if ( xDesc.is() )
            aError = xDesc->getStatusDescription();         // error description from component
        ScSolverNoSolutionDialog aDialog(m_xDialog.get(), aError);
        aDialog.run();
    }

    if ( bRestore )         // restore old values
    {
        mpDocShell->LockPaint();
        ScDocFunc &rFunc = mpDocShell->GetDocFunc();
        for (nVarPos=0; nVarPos<nVarCount; ++nVarPos)
        {
            ScAddress aCellPos;
            ScUnoConversion::FillScAddress( aCellPos, aVariables[nVarPos] );
            rFunc.SetValueCell(aCellPos, aOldValues[nVarPos], false);
        }
        mpDocShell->UnlockPaint();
    }

    return bClose;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */