ImageModel Class Reference

#include <history.h>

Collaboration diagram for ImageModel:

Public Member Functions
	ImageModel ()
void	CopyPrevious (void)
void	Undo (BOOL bClearRedo=FALSE)
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 () const
BOOL	HasUndoSteps () const
BOOL	HasRedoSteps () const
void	StretchSkew (int nStretchPercentX, int nStretchPercentY, int nSkewDegX=0, int nSkewDegY=0)
int	GetWidth () const
int	GetHeight () const
void	InvertColors ()
void	Clear (COLORREF color=0x00ffffff)
HDC	GetDC ()
void	FlipHorizontally ()
void	FlipVertically ()
void	RotateNTimes90Degrees (int iN)
void	DrawSelectionBackground (COLORREF rgbBG)
void	DeleteSelection ()
void	Bound (POINT &pt)

Public Attributes
HBITMAP	hBms [HISTORYSIZE]

Private Member Functions
void	NotifyDimensionsChanged ()
void	NotifyImageChanged ()

Private Attributes
HDC	hDrawingDC
int	currInd
int	undoSteps
int	redoSteps

Detailed Description

Definition at line 14 of file history.h.

Constructor & Destructor Documentation

ImageModel()

ImageModel::ImageModel

(

)

Definition at line 27 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

Bound()

void ImageModel::Bound

(

POINT &

pt

)

Definition at line 305 of file history.cpp.

{
    pt.x = max(0, min(pt.x, GetWidth()));
    pt.y = max(0, min(pt.y, GetHeight()));
}

Referenced by FreeSelTool::OnMouseMove(), RectSelTool::OnMouseMove(), and TextTool::UpdatePoint().

Clear()

void ImageModel::Clear

(

COLORREF

color = 0x00ffffff

)

Definition at line 233 of file history.cpp.

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

ClearHistory()

void ImageModel::ClearHistory

(

void

)

Definition at line 109 of file history.cpp.

{
    undoSteps = 0;
    redoSteps = 0;
}

Referenced by _tWinMain(), and SetBitmapAndInfo().

CopyPrevious()

void ImageModel::CopyPrevious

(

void

)

Definition at line 47 of file history.cpp.

{
    ATLTRACE("%s: %d\n", __FUNCTION__, currInd);
    DeleteObject(hBms[(currInd + 1) % HISTORYSIZE]);
    hBms[(currInd + 1) % HISTORYSIZE] = CopyDIBImage(hBms[currInd]);
    currInd = (currInd + 1) % HISTORYSIZE;
    if (undoSteps < HISTORYSIZE - 1)
        undoSteps++;
    redoSteps = 0;
    SelectObject(hDrawingDC, hBms[currInd]);
    imageSaved = FALSE;
}

Referenced by DeleteSelection(), FlipHorizontally(), FlipVertically(), CMainWindow::InsertSelectionFromHBITMAP(), InvertColors(), FreeSelTool::OnButtonDown(), RectSelTool::OnButtonDown(), GenericDrawTool::OnButtonDown(), FillTool::OnButtonDown(), ZoomTool::OnButtonDown(), TextTool::OnButtonDown(), BezierTool::OnButtonDown(), ShapeTool::OnButtonDown(), TextTool::OnButtonUp(), CMainWindow::OnCommand(), CSelectionWindow::OnLButtonUp(), RotateNTimes90Degrees(), SelectionModel::RotateNTimes90Degrees(), and SelectionModel::StretchSkew().

Crop()

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

Definition at line 131 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().

DeleteSelection()

void ImageModel::DeleteSelection

(

)

Definition at line 293 of file history.cpp.

{
    if (selectionWindow.IsWindowVisible())
        ResetToPrevious();
    CopyPrevious();
    if (selectionWindow.IsWindowVisible())
        Undo(TRUE);
    DrawSelectionBackground(paletteModel.GetBgColor());
    selectionWindow.ShowWindow(SW_HIDE);
    NotifyImageChanged();
}

Referenced by CMainWindow::OnCommand(), SelectionModel::RotateNTimes90Degrees(), and SelectionModel::StretchSkew().

DrawSelectionBackground()

void ImageModel::DrawSelectionBackground

(

COLORREF

rgbBG

)

Definition at line 285 of file history.cpp.

{
    if (toolsModel.GetActiveTool() == TOOL_FREESEL)
        selectionModel.DrawBackgroundPoly(hDrawingDC, rgbBG);
    else
        selectionModel.DrawBackgroundRect(hDrawingDC, rgbBG);
}

Referenced by DeleteSelection(), CSelectionWindow::ForceRefreshSelectionContents(), CSelectionWindow::OnLButtonUp(), and CSelectionWindow::OnMouseMove().

FlipHorizontally()

void ImageModel::FlipHorizontally

(

)

Definition at line 244 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 252 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 239 of file history.cpp.

{
    return hDrawingDC;
}

Referenced by ToolBase::beginEvent(), FlipHorizontally(), FlipVertically(), CSelectionWindow::ForceRefreshSelectionContents(), CMainWindow::OnCommand(), CSelectionWindow::OnMouseMove(), CMiniatureWindow::OnPaint(), CFullscreenWindow::OnPaint(), CImgAreaWindow::OnPaint(), and RotateNTimes90Degrees().

GetHeight()

int ImageModel::GetHeight

(

)

const

Definition at line 220 of file history.cpp.

{
    return GetDIBHeight(hBms[currInd]);
}

Referenced by _tWinMain(), Bound(), Clear(), Crop(), ColorTool::fetchColor(), 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(), ToolsModel::selectAll(), StretchSkew(), Undo(), updateCanvasAndScrollbars(), and zoomTo().

GetWidth()

int ImageModel::GetWidth

(

)

const

Definition at line 215 of file history.cpp.

{
    return GetDIBWidth(hBms[currInd]);
}

Referenced by _tWinMain(), Bound(), Clear(), Crop(), ColorTool::fetchColor(), 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(), ToolsModel::selectAll(), StretchSkew(), Undo(), updateCanvasAndScrollbars(), and zoomTo().

HasRedoSteps()

BOOL ImageModel::HasRedoSteps

(

)

const

Definition at line 184 of file history.cpp.

{
    return redoSteps > 0;
}

Referenced by CMainWindow::OnInitMenuPopup().

HasUndoSteps()

BOOL ImageModel::HasUndoSteps

(

)

const

Definition at line 179 of file history.cpp.

{
    return undoSteps > 0;
}

Referenced by CMainWindow::OnInitMenuPopup().

Insert()

void ImageModel::Insert

(

HBITMAP

hbm

)

Definition at line 115 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 CMainWindow::OnCommand(), SetBitmapAndInfo(), and StretchSkew().

InvertColors()

void ImageModel::InvertColors

(

)

Definition at line 225 of file history.cpp.

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

Referenced by CMainWindow::OnCommand().

IsImageSaved()

BOOL ImageModel::IsImageSaved

(

)

const

Definition at line 174 of file history.cpp.

{
    return imageSaved;
}

Referenced by CMainWindow::ConfirmSave().

NotifyDimensionsChanged()

void ImageModel::NotifyDimensionsChanged ( )

private

Definition at line 15 of file history.cpp.

{
    if (imageArea.IsWindow())
        imageArea.SendMessage(WM_IMAGEMODELDIMENSIONSCHANGED);
}

Referenced by Crop(), Insert(), Redo(), RotateNTimes90Degrees(), StretchSkew(), and Undo().

NotifyImageChanged()

void ImageModel::NotifyImageChanged ( )

private

Definition at line 21 of file history.cpp.

{
    if (imageArea.IsWindow())
        imageArea.SendMessage(WM_IMAGEMODELIMAGECHANGED);
}

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

Redo()

void ImageModel::Redo

(

void

)

Definition at line 81 of file history.cpp.

{
    ATLTRACE("%s: %d\n", __FUNCTION__, redoSteps);
    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 100 of file history.cpp.

{
    ATLTRACE("%s: %d\n", __FUNCTION__, currInd);
    DeleteObject(hBms[currInd]);
    hBms[currInd] = CopyDIBImage(hBms[(currInd + HISTORYSIZE - 1) % HISTORYSIZE]);
    SelectObject(hDrawingDC, hBms[currInd]);
    NotifyImageChanged();
}

Referenced by SelectionModel::CalculateBoundingBoxAndContents(), DeleteSelection(), LineTool::draw(), RectTool::draw(), EllipseTool::draw(), RRectTool::draw(), CSelectionWindow::ForceRefreshSelectionContents(), FreeSelTool::OnButtonUp(), RectSelTool::OnButtonUp(), BezierTool::OnButtonUp(), ShapeTool::OnButtonUp(), BezierTool::OnFinishDraw(), ShapeTool::OnFinishDraw(), CSelectionWindow::OnMouseMove(), FreeSelTool::OnMouseMove(), RectSelTool::OnMouseMove(), BezierTool::OnMouseMove(), ShapeTool::OnMouseMove(), and TextTool::UpdatePoint().

RotateNTimes90Degrees()

void ImageModel::RotateNTimes90Degrees

(

int

iN

)

Definition at line 260 of file history.cpp.

{
    switch (iN)
    {
    case 1:
    case 3:
        DeleteObject(hBms[(currInd + 1) % HISTORYSIZE]);
        hBms[(currInd + 1) % HISTORYSIZE] = Rotate90DegreeBlt(hDrawingDC, GetWidth(), GetHeight(), iN == 1);
        currInd = (currInd + 1) % HISTORYSIZE;
        if (undoSteps < HISTORYSIZE - 1)
            undoSteps++;
        redoSteps = 0;
        SelectObject(hDrawingDC, hBms[currInd]);
        imageSaved = FALSE;
        NotifyDimensionsChanged();
        break;
    case 2:
        CopyPrevious();
        StretchBlt(hDrawingDC, GetWidth() - 1, GetHeight() - 1, -GetWidth(), -GetHeight(), GetDC(),
                   0, 0, GetWidth(), GetHeight(), SRCCOPY);
        break;
    }
    NotifyImageChanged();
}

Referenced by CMainWindow::OnCommand().

SaveImage()

void ImageModel::SaveImage

(

LPTSTR

lpFileName

)

Definition at line 169 of file history.cpp.

{
    SaveDIBToFile(hBms[currInd], lpFileName, hDrawingDC);
}

Referenced by CMainWindow::saveImage().

StretchSkew()

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

Definition at line 189 of file history.cpp.

{
    int oldWidth = GetWidth();
    int oldHeight = GetHeight();
    INT newWidth = oldWidth * nStretchPercentX / 100;
    INT newHeight = oldHeight * nStretchPercentY / 100;
    if (oldWidth != newWidth || oldHeight != newHeight)
    {
        HBITMAP hbm0 = CopyDIBImage(hBms[currInd], newWidth, newHeight);
        Insert(hbm0);
    }
    if (nSkewDegX)
    {
        HBITMAP hbm1 = SkewDIB(hDrawingDC, hBms[currInd], nSkewDegX, FALSE);
        Insert(hbm1);
    }
    if (nSkewDegY)
    {
        HBITMAP hbm2 = SkewDIB(hDrawingDC, hBms[currInd], nSkewDegY, TRUE);
        Insert(hbm2);
    }
    if (GetWidth() != oldWidth || GetHeight() != oldHeight)
        NotifyDimensionsChanged();
    NotifyImageChanged();
}

Referenced by CMainWindow::OnCommand().

Undo()

void ImageModel::Undo

(

BOOL

bClearRedo = FALSE

)

Definition at line 60 of file history.cpp.

{
    ATLTRACE("%s: %d\n", __FUNCTION__, undoSteps);
    if (undoSteps > 0)
    {
        int oldWidth = GetWidth();
        int oldHeight = GetHeight();
        selectionWindow.ShowWindow(SW_HIDE);
        currInd = (currInd + HISTORYSIZE - 1) % HISTORYSIZE;
        SelectObject(hDrawingDC, hBms[currInd]);
        undoSteps--;
        if (bClearRedo)
            redoSteps = 0;
        else if (redoSteps < HISTORYSIZE - 1)
            redoSteps++;
        if (GetWidth() != oldWidth || GetHeight() != oldHeight)
            NotifyDimensionsChanged();
        NotifyImageChanged();
    }
}

Referenced by DeleteSelection(), FreeSelTool::OnButtonUp(), RectSelTool::OnButtonUp(), TextTool::OnButtonUp(), FreeSelTool::OnCancelDraw(), RectSelTool::OnCancelDraw(), GenericDrawTool::OnCancelDraw(), BezierTool::OnCancelDraw(), ShapeTool::OnCancelDraw(), CMainWindow::OnCommand(), ShapeTool::OnFinishDraw(), and CSelectionWindow::OnLButtonUp().

Member Data Documentation

currInd

int ImageModel::currInd

private

Definition at line 23 of file history.h.

Referenced by CopyPrevious(), Crop(), GetHeight(), GetWidth(), ImageModel(), Insert(), Redo(), ResetToPrevious(), RotateNTimes90Degrees(), SaveImage(), StretchSkew(), and Undo().

hBms

HBITMAP ImageModel::hBms[HISTORYSIZE]

Definition at line 21 of file history.h.

Referenced by CopyPrevious(), Crop(), GetHeight(), GetWidth(), ImageModel(), Insert(), Redo(), ResetToPrevious(), RotateNTimes90Degrees(), SaveImage(), StretchSkew(), and Undo().

hDrawingDC

HDC ImageModel::hDrawingDC

private

Definition at line 19 of file history.h.

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

redoSteps

int ImageModel::redoSteps

private

Definition at line 25 of file history.h.

Referenced by ClearHistory(), CopyPrevious(), Crop(), HasRedoSteps(), ImageModel(), Insert(), Redo(), RotateNTimes90Degrees(), and Undo().

undoSteps

int ImageModel::undoSteps

private

Definition at line 24 of file history.h.

Referenced by ClearHistory(), CopyPrevious(), Crop(), HasUndoSteps(), ImageModel(), Insert(), Redo(), RotateNTimes90Degrees(), and Undo().

---

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

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