/*
 * Copyright 2002-2008, Haiku. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Michael Pfeiffer
 *              Hartmut Reh
 *              julun <host.haiku@gmx.de>
 */
#include "BlockingWindow.h"
#include "JobData.h"
#include "PrintJobReader.h"


#include <View.h>


class BButton;
class BFile;
class BMessage;
class BPicture;
class BScrollView;
class BStringView;
class BTextControl;


// #pragma mark - PreviewPage


class PreviewPage {
public:
                                PreviewPage(int32 page, PrintJobPage* pjp);
                                ~PreviewPage();

        void            Draw(BView* view, const BRect& printRect);
        status_t        InitCheck() const;
        int32           Page() const { return fPage; }

private:
        int32           fPage;
        status_t        fStatus;
        int32           fNumberOfPictures;

        BRect*          fRects;
        BPoint*         fPoints;
        BPicture*       fPictures;
};


// #pragma mark - PreviewView


class PreviewView : public BView {
public:
                                                        PreviewView(BFile* jobFile, BRect rect);
        virtual                                 ~PreviewView();

        virtual void                    Show();
        virtual void                    Hide();
        virtual void                    Draw(BRect r);
        virtual void                    FrameResized(float width, float height);
        virtual void                    MouseDown(BPoint point);
        virtual void                    MouseMoved(BPoint point, uint32 transit,
                                                                const BMessage* message);
        virtual void                    MouseUp(BPoint point);
        virtual void                    KeyDown(const char* bytes, int32 numBytes);

                        void                    ShowFirstPage();
                        void                    ShowPrevPage();
                        void                    ShowNextPage();
                        void                    ShowLastPage();
                        bool                    ShowsFirstPage() const;
                        bool                    ShowsLastPage() const;
                        void                    ShowFindPage(int32 page);

                        void                    ZoomIn();
                        bool                    CanZoomIn() const;
                        void                    ZoomOut();
                        bool                    CanZoomOut() const;

                        void                    FixScrollbars();
                        BRect                   ViewRect() const;
                        status_t                InitCheck() const;
                        int32                   NumberOfPages() const;
                        int32                   CurrentPage() const { return fPage + 1; }

private:
                        BRect                   _PaperRect() const;
                        float                   _ZoomFactor() const;
                        BRect                   _PrintableRect() const;

                        void                    _LoadPage(int32 page);
                        bool                    _IsPageValid() const;
                        bool                    _IsPageLoaded(int32 page) const;

                        BRect                   _ContentRect() const;
                        void                    _DrawPageFrame(BRect rect);
                        void                    _DrawPage(BRect updateRect);
                        void                    _DrawMarginFrame(BRect rect);

                        int32                   _GetPageNumber(int32 index) const;

private:
                        int32                   fPage;
                        int32                   fZoom;
                        PrintJobReader  fReader;
                        bool                    fReverse;
                        BRect                   fPaperRect;
                        BRect                   fPrintableRect;
                        bool                    fTracking;
                        bool                    fInsideView;
                        BPoint                  fScrollStart;
                        int32                   fNumberOfPages;
                        int32                   fNumberOfPagesPerPage;
                        PreviewPage*    fCachedPage;

                        JobData::Orientation    fOrientation;
                        JobData::PageSelection  fPageSelection;
};


// #pragma mark - PreviewWindow


class PreviewWindow : public BlockingWindow {
public:
                                                        PreviewWindow(BFile* jobFile,
                                                                bool showOkAndCancelButtons = false);

        virtual void                    MessageReceived(BMessage* m);

                        status_t                Go();
                        status_t                InitCheck() const { return fPreview->InitCheck(); }


private:
                        void                    _ResizeToPage();
                        void                    _UpdateControls();

private:
                        BButton*                fFirst;
                        BButton*                fNext;
                        BButton*                fPrev;
                        BButton*                fLast;
                        BButton*                fZoomIn;
                        BButton*                fZoomOut;
                        BTextControl*   fPageNumber;
                        BStringView*    fPageText;
                        PreviewView*    fPreview;
                        BScrollView*    fPreviewScroller;
                        float                   fButtonBarHeight;

                        enum {
                                                        MSG_FIRST_PAGE = 'pwfp',
                                                        MSG_NEXT_PAGE  = 'pwnp',
                                                        MSG_PREV_PAGE  = 'pwpp',
                                                        MSG_LAST_PAGE  = 'pwlp',
                                                        MSG_FIND_PAGE  = 'pwsp',
                                                        MSG_ZOOM_IN    = 'pwzi',
                                                        MSG_ZOOM_OUT   = 'pwzo',
                                                        MSG_PRINT_JOB  = 'pwpj',
                                                        MSG_CANCEL_JOB = 'pwcj',
                        };
};