//##################################################################################################
//
//   Custom Visualization Core library
//   Copyright (C) 2011-2013 Ceetron AS
//
//   This library may be used under the terms of either the GNU General Public License or
//   the GNU Lesser General Public License as follows:
//
//   GNU General Public License Usage
//   This library 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 3 of the License, or
//   (at your option) any later version.
//
//   This library 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 at <<http://www.gnu.org/licenses/gpl.html>>
//   for more details.
//
//   GNU Lesser General Public License Usage
//   This library is free software; you can redistribute it and/or modify
//   it under the terms of the GNU Lesser General Public License as published by
//   the Free Software Foundation; either version 2.1 of the License, or
//   (at your option) any later version.
//
//   This library 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 Lesser General Public License at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
//   for more details.
//
//##################################################################################################


#pragma once

#include "cafPdmUiFieldEditorHandle.h"

#include <QLabel>
#include <QLineEdit>
#include <QPointer>
#include <QString>
#include <QValidator>
#include <QWidget>

class QGridLayout;
class QCompleter;
class QStringListModel;

namespace caf 
{

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
class PdmUiLineEditorAttribute : public PdmUiEditorAttribute
{
public:
    PdmUiLineEditorAttribute()
    {
        avoidSendingEnterEventToParentWidget = false;
        completerCaseSensitivity             = Qt::CaseInsensitive;
        completerFilterMode                  = Qt::MatchContains;
        maximumWidth                         = -1;
        selectAllOnFocusEvent                = false;
        placeholderText                      = "";
    }

public:
    bool                 avoidSendingEnterEventToParentWidget;
    QPointer<QValidator> validator;    

    // Completer setup
    Qt::CaseSensitivity  completerCaseSensitivity;
    Qt::MatchFlags       completerFilterMode;
    int                  maximumWidth;
    bool                 selectAllOnFocusEvent;
    QString              placeholderText;
};

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
class PdmUiLineEditorAttributeUiDisplayString : public PdmUiEditorAttribute
{
public:
    PdmUiLineEditorAttributeUiDisplayString()
    {}

public:
    QString m_displayString;
};

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
class PdmUiLineEdit : public QLineEdit
{
    Q_OBJECT
public:
    PdmUiLineEdit(QWidget* parent);
    void setAvoidSendingEnterEventToParentWidget(bool avoidSendingEnter);
protected:
    void keyPressEvent(QKeyEvent* event) override;
private:
    bool m_avoidSendingEnterEvent;
};

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
class PdmUiLineEditor : public PdmUiFieldEditorHandle
{
    Q_OBJECT
    CAF_PDM_UI_FIELD_EDITOR_HEADER_INIT;

public:
    PdmUiLineEditor() : m_ignoreCompleterActivated(false)         {} 
    ~PdmUiLineEditor() override {} 

protected:
    QWidget*    createEditorWidget(QWidget * parent) override;
    QWidget*    createLabelWidget(QWidget * parent) override;
    void        configureAndUpdateUi(const QString& uiConfigName) override;
    QMargins    calculateLabelContentMargins() const override;

    virtual bool eventFilter(QObject *watched, QEvent *event) override;

protected slots:
    void        slotEditingFinished();
    void        slotCompleterActivated(const QModelIndex& index);

private:
    bool        isMultipleFieldsWithSameKeywordSelected(PdmFieldHandle* editorField) const;

protected:
    QPointer<PdmUiLineEdit>    m_lineEdit;
    QPointer<QShortenedLabel>  m_label;
    
    QPointer<QCompleter>       m_completer; 
    QPointer<QStringListModel> m_completerTextList;
    QList<PdmOptionItemInfo>   m_optionCache;
    bool                       m_ignoreCompleterActivated;

    int findIndexToOption(const QString& uiText);
};


} // end namespace caf