ImageModel Class Reference

#include <history.h>

Collaboration diagram for ImageModel:

Public Member Functions
	ImageModel ()
void	CopyPrevious (void)
void	Undo (void)
void	Redo (void)
void	ResetToPrevious (void)
void	ClearHistory (void)
void	Insert (HBITMAP hbm)
void	Crop (int nWidth, int nHeight, int nOffsetX=0, int nOffsetY=0)
void	SaveImage (LPTSTR lpFileName)
BOOL	IsImageSaved ()
BOOL	HasUndoSteps ()
BOOL	HasRedoSteps ()
void	StretchSkew (int nStretchPercentX, int nStretchPercentY, int nSkewDegX=0, int nSkewDegY=0)
int	GetWidth ()
int	GetHeight ()
void	InvertColors ()
void	Clear (COLORREF color=0x00ffffff)
HDC	GetDC ()
void	FlipHorizontally ()
void	FlipVertically ()
void	RotateNTimes90Degrees (int iN)

Public Attributes
HBITMAP	hBms [HISTORYSIZE]
BOOL	imageSaved

Private Member Functions
void	NotifyDimensionsChanged ()
void	NotifyImageChanged ()

Private Attributes
HDC	hDrawingDC
int	currInd
int	undoSteps
int	redoSteps

Detailed Description

Definition at line 11 of file history.h.

Constructor & Destructor Documentation

ImageModel()

ImageModel::ImageModel

(

)

Definition at line 25 of file history.cpp.

{
    currInd = 0;
    undoSteps = 0;
    redoSteps = 0;
    imageSaved = TRUE;

    // prepare a minimal usable bitmap
    int imgXRes = 1;
    int imgYRes = 1;

    hDrawingDC = CreateCompatibleDC(NULL);
    SelectObject(hDrawingDC, CreatePen(PS_SOLID, 0, paletteModel.GetFgColor()));
    SelectObject(hDrawingDC, CreateSolidBrush(paletteModel.GetBgColor()));

    hBms[0] = CreateDIBWithProperties(imgXRes, imgYRes);
    SelectObject(hDrawingDC, hBms[0]);
    Rectangle(hDrawingDC, 0 - 1, 0 - 1, imgXRes + 1, imgYRes + 1);
}

Member Function Documentation

Clear()

void ImageModel::Clear

(

COLORREF

color = 0x00ffffff

)

Definition at line 213 of file history.cpp.

{
    Rectangle(hDrawingDC, 0 - 1, 0 - 1, GetWidth() + 1, GetHeight() + 1);
    NotifyImageChanged();
}

Referenced by CMainWindow::OnCommand().

ClearHistory()

void ImageModel::ClearHistory

(

void

)

Definition at line 102 of file history.cpp.

{
    undoSteps = 0;
    redoSteps = 0;
}

Referenced by _tWinMain(), CMainWindow::OnCommand(), and CMainWindow::UpdateApplicationProperties().

CopyPrevious()

void ImageModel::CopyPrevious

(

void

)

Definition at line 45 of file history.cpp.

{
    DeleteObject(hBms[(currInd + 1) % HISTORYSIZE]);
    hBms[(currInd + 1) % HISTORYSIZE] = (HBITMAP) CopyImage(hBms[currInd], IMAGE_BITMAP, 0, 0, LR_COPYRETURNORG);
    currInd = (currInd + 1) % HISTORYSIZE;
    if (undoSteps < HISTORYSIZE - 1)
        undoSteps++;
    redoSteps = 0;
    SelectObject(hDrawingDC, hBms[currInd]);
    imageSaved = FALSE;
}

Referenced by endPaintingL(), FlipHorizontally(), FlipVertically(), CMainWindow::InsertSelectionFromHBITMAP(), InvertColors(), CMainWindow::OnCommand(), RotateNTimes90Degrees(), startPaintingL(), startPaintingR(), and whilePaintingL().

Crop()

void ImageModel::Crop	(	int	nWidth,
		int	nHeight,
		int	nOffsetX = 0,
		int	nOffsetY = 0
	)

Definition at line 124 of file history.cpp.

{
    HDC hdc;
    HPEN oldPen;
    HBRUSH oldBrush;
    int oldWidth = GetWidth();
    int oldHeight = GetHeight();

    if (nWidth <= 0)
        nWidth = 1;
    if (nHeight <= 0)
        nHeight = 1;

    SelectObject(hDrawingDC, hBms[currInd]);
    DeleteObject(hBms[(currInd + 1) % HISTORYSIZE]);
    hBms[(currInd + 1) % HISTORYSIZE] = CreateDIBWithProperties(nWidth, nHeight);
    currInd = (currInd + 1) % HISTORYSIZE;
    if (undoSteps < HISTORYSIZE - 1)
        undoSteps++;
    redoSteps = 0;

    hdc = CreateCompatibleDC(hDrawingDC);
    SelectObject(hdc, hBms[currInd]);

    oldPen = (HPEN) SelectObject(hdc, CreatePen(PS_SOLID, 1, paletteModel.GetBgColor()));
    oldBrush = (HBRUSH) SelectObject(hdc, CreateSolidBrush(paletteModel.GetBgColor()));
    Rectangle(hdc, 0, 0, nWidth, nHeight);
    BitBlt(hdc, -nOffsetX, -nOffsetY, GetWidth(), GetHeight(), hDrawingDC, 0, 0, SRCCOPY);
    DeleteObject(SelectObject(hdc, oldBrush));
    DeleteObject(SelectObject(hdc, oldPen));
    DeleteDC(hdc);
    SelectObject(hDrawingDC, hBms[currInd]);

    if (GetWidth() != oldWidth || GetHeight() != oldHeight)
        NotifyDimensionsChanged();
    NotifyImageChanged();
}

Referenced by _tWinMain(), CMainWindow::InsertSelectionFromHBITMAP(), CMainWindow::OnCommand(), and CSizeboxWindow::OnLButtonUp().

FlipHorizontally()

void ImageModel::FlipHorizontally

(

)

Definition at line 224 of file history.cpp.

{
    CopyPrevious();
    StretchBlt(hDrawingDC, GetWidth() - 1, 0, -GetWidth(), GetHeight(), GetDC(), 0, 0,
               GetWidth(), GetHeight(), SRCCOPY);
    NotifyImageChanged();
}

Referenced by CMainWindow::OnCommand().

FlipVertically()

void ImageModel::FlipVertically

(

)

Definition at line 232 of file history.cpp.

{
    CopyPrevious();
    StretchBlt(hDrawingDC, 0, GetHeight() - 1, GetWidth(), -GetHeight(), GetDC(), 0, 0,
               GetWidth(), GetHeight(), SRCCOPY);
    NotifyImageChanged();
}

Referenced by CMainWindow::OnCommand().

GetDC()

HDC ImageModel::GetDC

(

)

Definition at line 219 of file history.cpp.

{
    return hDrawingDC;
}

Referenced by CImgAreaWindow::cancelDrawing(), FlipHorizontally(), FlipVertically(), CMainWindow::OnCommand(), CImgAreaWindow::OnLButtonDown(), CImgAreaWindow::OnLButtonUp(), CSelectionWindow::OnMouseMove(), CImgAreaWindow::OnMouseMove(), CMiniatureWindow::OnPaint(), CFullscreenWindow::OnPaint(), CImgAreaWindow::OnPaint(), CImgAreaWindow::OnRButtonDown(), CImgAreaWindow::OnRButtonUp(), and RotateNTimes90Degrees().

GetHeight()

int ImageModel::GetHeight

(

)

Definition at line 200 of file history.cpp.

{
    return GetDIBHeight(hBms[currInd]);
}

Referenced by _tWinMain(), Clear(), Crop(), FlipHorizontally(), FlipVertically(), Insert(), CMainWindow::InsertSelectionFromHBITMAP(), InvertColors(), CMainWindow::OnCommand(), CAttributesDialog::OnDefault(), CScrollboxWindow::OnHScroll(), CAttributesDialog::OnInitDialog(), CSizeboxWindow::OnLButtonUp(), CSizeboxWindow::OnMouseMove(), CImgAreaWindow::OnMouseMove(), CMiniatureWindow::OnPaint(), CFullscreenWindow::OnPaint(), CImgAreaWindow::OnPaint(), CImgAreaWindow::OnSize(), CScrollboxWindow::OnVScroll(), Redo(), RotateNTimes90Degrees(), StretchSkew(), Undo(), updateCanvasAndScrollbars(), whilePaintingL(), and zoomTo().

GetWidth()

int ImageModel::GetWidth

(

)

Definition at line 195 of file history.cpp.

{
    return GetDIBWidth(hBms[currInd]);
}

Referenced by _tWinMain(), Clear(), Crop(), FlipHorizontally(), FlipVertically(), Insert(), CMainWindow::InsertSelectionFromHBITMAP(), InvertColors(), CMainWindow::OnCommand(), CAttributesDialog::OnDefault(), CScrollboxWindow::OnHScroll(), CAttributesDialog::OnInitDialog(), CSizeboxWindow::OnLButtonUp(), CSizeboxWindow::OnMouseMove(), CImgAreaWindow::OnMouseMove(), CMiniatureWindow::OnPaint(), CFullscreenWindow::OnPaint(), CImgAreaWindow::OnPaint(), CImgAreaWindow::OnSize(), CScrollboxWindow::OnVScroll(), Redo(), RotateNTimes90Degrees(), StretchSkew(), Undo(), updateCanvasAndScrollbars(), whilePaintingL(), and zoomTo().

HasRedoSteps()

BOOL ImageModel::HasRedoSteps

(

)

Definition at line 178 of file history.cpp.

{
    return redoSteps > 0;
}

Referenced by CMainWindow::OnInitMenuPopup().

HasUndoSteps()

BOOL ImageModel::HasUndoSteps

(

)

Definition at line 173 of file history.cpp.

{
    return undoSteps > 0;
}

Referenced by CMainWindow::OnInitMenuPopup().

Insert()

void ImageModel::Insert

(

HBITMAP

hbm

)

Definition at line 108 of file history.cpp.

{
    int oldWidth = GetWidth();
    int oldHeight = GetHeight();
    DeleteObject(hBms[(currInd + 1) % HISTORYSIZE]);
    hBms[(currInd + 1) % HISTORYSIZE] = hbm;
    currInd = (currInd + 1) % HISTORYSIZE;
    if (undoSteps < HISTORYSIZE - 1)
        undoSteps++;
    redoSteps = 0;
    SelectObject(hDrawingDC, hBms[currInd]);
    if (GetWidth() != oldWidth || GetHeight() != oldHeight)
        NotifyDimensionsChanged();
    NotifyImageChanged();
}

Referenced by _tWinMain(), CMainWindow::OnCommand(), StretchSkew(), and CMainWindow::UpdateApplicationProperties().

InvertColors()

void ImageModel::InvertColors

(

)

Definition at line 205 of file history.cpp.

{
    RECT rect = {0, 0, GetWidth(), GetHeight()};
    CopyPrevious();
    InvertRect(hDrawingDC, &rect);
    NotifyImageChanged();
}

Referenced by CMainWindow::OnCommand().

IsImageSaved()

BOOL ImageModel::IsImageSaved

(

)

Definition at line 168 of file history.cpp.

{
    return imageSaved;
}

Referenced by CMainWindow::OnClose(), and CMainWindow::OnCommand().

NotifyDimensionsChanged()

void ImageModel::NotifyDimensionsChanged ( )

private

Definition at line 15 of file history.cpp.

{
    imageArea.SendMessage(WM_IMAGEMODELDIMENSIONSCHANGED);
}

Referenced by Crop(), Insert(), Redo(), StretchSkew(), and Undo().

NotifyImageChanged()

void ImageModel::NotifyImageChanged ( )

private

Definition at line 20 of file history.cpp.

{
    imageArea.SendMessage(WM_IMAGEMODELIMAGECHANGED);
}

Referenced by Clear(), Crop(), FlipHorizontally(), FlipVertically(), Insert(), InvertColors(), Redo(), ResetToPrevious(), RotateNTimes90Degrees(), StretchSkew(), and Undo().

Redo()

void ImageModel::Redo

(

void

)

Definition at line 75 of file history.cpp.

{
    if (redoSteps > 0)
    {
        int oldWidth = GetWidth();
        int oldHeight = GetHeight();
        selectionWindow.ShowWindow(SW_HIDE);
        currInd = (currInd + 1) % HISTORYSIZE;
        SelectObject(hDrawingDC, hBms[currInd]);
        redoSteps--;
        if (undoSteps < HISTORYSIZE - 1)
            undoSteps++;
        if (GetWidth() != oldWidth || GetHeight() != oldHeight)
            NotifyDimensionsChanged();
        NotifyImageChanged();
    }
}

Referenced by CMainWindow::OnCommand().

ResetToPrevious()

void ImageModel::ResetToPrevious

(

void

)

Definition at line 93 of file history.cpp.

{
    DeleteObject(hBms[currInd]);
    hBms[currInd] =
        (HBITMAP) CopyImage(hBms[(currInd + HISTORYSIZE - 1) % HISTORYSIZE], IMAGE_BITMAP, 0, 0, LR_COPYRETURNORG);
    SelectObject(hDrawingDC, hBms[currInd]);
    NotifyImageChanged();
}

Referenced by SelectionModel::CalculateBoundingBoxAndContents(), CImgAreaWindow::cancelDrawing(), endPaintingL(), endPaintingR(), CSelectionWindow::OnMouseMove(), whilePaintingL(), and whilePaintingR().

RotateNTimes90Degrees()

void ImageModel::RotateNTimes90Degrees

(

int

iN

)

Definition at line 240 of file history.cpp.

{
    if (iN == 2)
    {
        CopyPrevious();
        StretchBlt(hDrawingDC, GetWidth() - 1, GetHeight() - 1, -GetWidth(), -GetHeight(), GetDC(),
                   0, 0, GetWidth(), GetHeight(), SRCCOPY);
    }
    NotifyImageChanged();
}

Referenced by CMainWindow::OnCommand().

SaveImage()

void ImageModel::SaveImage

(

LPTSTR

lpFileName

)

Definition at line 162 of file history.cpp.

{
    SaveDIBToFile(hBms[currInd], lpFileName, hDrawingDC, &fileTime, &fileSize, fileHPPM, fileVPPM);
    imageSaved = TRUE;
}

Referenced by CMainWindow::saveImage().

StretchSkew()

void ImageModel::StretchSkew	(	int	nStretchPercentX,
		int	nStretchPercentY,
		int	nSkewDegX = 0,
		int	nSkewDegY = 0
	)

Definition at line 183 of file history.cpp.

{
    int oldWidth = GetWidth();
    int oldHeight = GetHeight();
    Insert((HBITMAP) CopyImage(hBms[currInd], IMAGE_BITMAP,
           GetWidth() * nStretchPercentX / 100,
           GetHeight() * nStretchPercentY / 100, 0));
    if (GetWidth() != oldWidth || GetHeight() != oldHeight)
        NotifyDimensionsChanged();
    NotifyImageChanged();
}

Referenced by CMainWindow::OnCommand().

Undo()

void ImageModel::Undo

(

void

)

Definition at line 57 of file history.cpp.

{
    if (undoSteps > 0)
    {
        int oldWidth = GetWidth();
        int oldHeight = GetHeight();
        selectionWindow.ShowWindow(SW_HIDE);
        currInd = (currInd + HISTORYSIZE - 1) % HISTORYSIZE;
        SelectObject(hDrawingDC, hBms[currInd]);
        undoSteps--;
        if (redoSteps < HISTORYSIZE - 1)
            redoSteps++;
        if (GetWidth() != oldWidth || GetHeight() != oldHeight)
            NotifyDimensionsChanged();
        NotifyImageChanged();
    }
}

Referenced by CImgAreaWindow::cancelDrawing(), CSelectionWindow::OnCaptureChanged(), CMainWindow::OnCommand(), CImgAreaWindow::OnLButtonDown(), and CImgAreaWindow::OnRButtonDown().

Member Data Documentation

currInd

int ImageModel::currInd

private

Definition at line 20 of file history.h.

Referenced by CopyPrevious(), Crop(), GetHeight(), GetWidth(), ImageModel(), Insert(), Redo(), ResetToPrevious(), SaveImage(), StretchSkew(), and Undo().

hBms

HBITMAP ImageModel::hBms[HISTORYSIZE]

Definition at line 18 of file history.h.

Referenced by CopyPrevious(), Crop(), GetHeight(), GetWidth(), ImageModel(), Insert(), Redo(), ResetToPrevious(), SaveImage(), StretchSkew(), and Undo().

hDrawingDC

HDC ImageModel::hDrawingDC

private

Definition at line 16 of file history.h.

Referenced by Clear(), CopyPrevious(), Crop(), FlipHorizontally(), FlipVertically(), GetDC(), ImageModel(), Insert(), InvertColors(), Redo(), ResetToPrevious(), RotateNTimes90Degrees(), SaveImage(), and Undo().

imageSaved

BOOL ImageModel::imageSaved

Definition at line 24 of file history.h.

Referenced by CopyPrevious(), ImageModel(), IsImageSaved(), CMainWindow::OnCommand(), and SaveImage().

redoSteps

int ImageModel::redoSteps

private

Definition at line 22 of file history.h.

Referenced by ClearHistory(), CopyPrevious(), Crop(), HasRedoSteps(), ImageModel(), Insert(), Redo(), and Undo().

undoSteps

int ImageModel::undoSteps

private

Definition at line 21 of file history.h.

Referenced by ClearHistory(), CopyPrevious(), Crop(), HasUndoSteps(), ImageModel(), Insert(), Redo(), and Undo().

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The documentation for this class was generated from the following files:

• base/applications/mspaint/history.h
• base/applications/mspaint/history.cpp