/*
 * Copyright 2006 Haiku, Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Stephan Aßmus, superstippi@gmx.de
 */
#ifndef EXPRESSION_TEXT_VIEW_H
#define EXPRESSION_TEXT_VIEW_H


#include <List.h>
#include <String.h>

#include "InputTextView.h"


class CalcView;

class ExpressionTextView : public InputTextView {
 public:
                                                                ExpressionTextView(BRect frame,
                                                                        CalcView* calcView);
        virtual                                         ~ExpressionTextView();

        // BView
        virtual void                            MakeFocus(bool focused = true);
        virtual void                            KeyDown(const char* bytes, int32 numBytes);

        virtual void                            MouseDown(BPoint where);

        // TextView
        virtual void                            GetDragParameters(BMessage* dragMessage,
                                                                        BBitmap** bitmap, BPoint* point,
                                                                        BHandler** handler);
        virtual void                            SetTextRect(BRect rect);

        // InputTextView
        virtual void                            RevertChanges();
        virtual void                            ApplyChanges();

        // ExpressionTextView
                        void                            AddKeypadLabel(const char* label);

                        void                            SetExpression(const char* expression);
                        void                            SetValue(BString value, BString decimalSeparator = ".");

                        void                            BackSpace();
                        void                            Clear();

                        void                            AddExpressionToHistory(const char* expression);
                        void                            PreviousExpression();
                        void                            NextExpression();

                        void                            LoadSettings(const BMessage* archive);
                        status_t                        SaveSettings(BMessage* archive) const;

 private:
                        CalcView*                       fCalcView;
                        BString                         fKeypadLabels;

                        BList                           fPreviousExpressions;
                        int32                           fHistoryPos;
                        BString                         fCurrentExpression;
                        BString                         fCurrentValue;

                        bool                            fChangesApplied;
};

#endif // EXPRESSION_TEXT_VIEW_H