| Version: 3.2.8

Public Member Functions | List of all members
wxWindowDC Class Reference
Class List by Category » Device Contexts

`#include <wx/dcclient.h>`

Inheritance diagram for wxWindowDC:
[legend]

## Detailed Description

A wxWindowDC must be constructed if an application wishes to paint on the whole area of a window (client and decorations).

This should normally be constructed as a temporary stack object; don't store a wxWindowDC object.

To draw on a window from inside an EVT_PAINT() handler, construct a wxPaintDC object instead.

To draw on the client area of a window from outside an EVT_PAINT() handler, construct a wxClientDC object.

A wxWindowDC object is initialized to use the same font and colours as the window it is associated with.

##

Library: wxCore
Category: Device Contexts

See also
  wxDC, wxMemoryDC, wxPaintDC, wxClientDC, wxScreenDC

## Public Member Functions
| wxWindowDC (wxWindow *window)
| Constructor. More...
Public Member Functions inherited from wxDC
void | CopyAttributes (const wxDC &dc)
| Copy attributes from another DC. More...
double | GetContentScaleFactor () const
| Returns the factor used for converting logical pixels to physical ones. More...
int | GetDepth () const
| Returns the depth (number of bits/pixel) of this DC. More...
wxPoint | GetDeviceOrigin () const
| Returns the current device origin. More...
wxRasterOperationMode | GetLogicalFunction () const
| Gets the current logical function. More...
wxMappingMode | GetMapMode () const
| Gets the current mapping mode for the device context. More...
bool | GetPixel (wxCoord x, wxCoord y, wxColour *colour) const
| Gets in colour the colour at the specified location. More...
wxSize | GetPPI () const
| Returns the resolution of the device in pixels per inch. More...
wxSize | FromDIP (const wxSize &sz) const
| Convert DPI-independent pixel values to the value in pixels appropriate for the DC. More...
wxPoint | FromDIP (const wxPoint &pt) const
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
int | FromDIP (int d) const
| Convert DPI-independent value in pixels to the value in pixels appropriate for the DC. More...
wxSize | ToDIP (const wxSize &sz) const
| Convert pixel values of the current DC to DPI-independent pixel values. More...
wxPoint | ToDIP (const wxPoint &pt) const
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
int | ToDIP (int d) const
| Convert pixel values of the current DC to DPI-independent pixel values. More...
void | GetSize (wxCoord *width, wxCoord *height) const
| Gets the horizontal and vertical extent of this device context in device units. More...
wxSize | GetSize () const
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | GetSizeMM (wxCoord *width, wxCoord *height) const
| Returns the horizontal and vertical resolution in millimetres. More...
wxSize | GetSizeMM () const
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | GetUserScale (double *x, double *y) const
| Gets the current user scale factor. More...
bool | IsOk () const
| Returns true if the DC is ok to use. More...
void | SetAxisOrientation (bool xLeftRight, bool yBottomUp)
| Sets the x and y axis orientation (i.e. the direction from lowest to highest values on the axis). More...
void | SetDeviceOrigin (wxCoord x, wxCoord y)
| Sets the device origin (i.e. the origin in pixels after scaling has been applied). More...
void | SetLogicalFunction (wxRasterOperationMode function)
| Sets the current logical function for the device context. More...
void | SetMapMode (wxMappingMode mode)
| The mapping mode of the device context defines the unit of measurement used to convert logical units to device units. More...
void | SetPalette (const wxPalette &palette)
| If this is a window DC or memory DC, assigns the given palette to the window or bitmap associated with the DC. More...
void | SetUserScale (double xScale, double yScale)
| Sets the user scaling factor, useful for applications which require 'zooming'. More...
void * | GetHandle () const
| Returns a value that can be used as a handle to the native drawing context, if this wxDC has something that could be thought of in that way. More...
wxBitmap | GetAsBitmap (const wxRect *subrect=NULL) const
| If supported by the platform and the type of DC, fetch the contents of the DC, or a subset of it, as a bitmap. More...
void | SetLogicalScale (double x, double y)
| Set the scale to use for translating wxDC coordinates to the physical pixels. More...
void | GetLogicalScale (double *x, double *y) const
| Return the scale set by the last call to SetLogicalScale(). More...
void | SetLogicalOrigin (wxCoord x, wxCoord y)
| Change the offset used for translating wxDC coordinates. More...
virtual wxGraphicsContext * | GetGraphicsContext () const
| If supported by the platform and the wxDC implementation, this method will return the wxGraphicsContext associated with the DC. More...
virtual void | SetGraphicsContext (wxGraphicsContext *ctx)
| Associate a wxGraphicsContext with the DC. More...
wxCoord | DeviceToLogicalX (wxCoord x) const
| Convert device X coordinate to logical coordinate, using the current mapping mode, user scale factor, device origin and axis orientation. More...
wxCoord | DeviceToLogicalXRel (wxCoord x) const
| Convert device X coordinate to relative logical coordinate, using the current mapping mode and user scale factor but ignoring the axis orientation. More...
wxCoord | DeviceToLogicalY (wxCoord y) const
| Converts device Y coordinate to logical coordinate, using the current mapping mode, user scale factor, device origin and axis orientation. More...
wxCoord | DeviceToLogicalYRel (wxCoord y) const
| Convert device Y coordinate to relative logical coordinate, using the current mapping mode and user scale factor but ignoring the axis orientation. More...
wxCoord | LogicalToDeviceX (wxCoord x) const
| Converts logical X coordinate to device coordinate, using the current mapping mode, user scale factor, device origin and axis orientation. More...
wxCoord | LogicalToDeviceXRel (wxCoord x) const
| Converts logical X coordinate to relative device coordinate, using the current mapping mode and user scale factor but ignoring the axis orientation. More...
wxCoord | LogicalToDeviceY (wxCoord y) const
| Converts logical Y coordinate to device coordinate, using the current mapping mode, user scale factor, device origin and axis orientation. More...
wxCoord | LogicalToDeviceYRel (wxCoord y) const
| Converts logical Y coordinate to relative device coordinate, using the current mapping mode and user scale factor but ignoring the axis orientation. More...
wxPoint | DeviceToLogical (wxCoord x, wxCoord y) const
| Converts device (x, y) coordinates to logical coordinates taking into account all applied transformations like the current mapping mode, scale factors, device origin, axes orientation, affine transformation. More...
wxPoint | DeviceToLogical (const wxPoint &pt) const
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
wxSize | DeviceToLogicalRel (int x, int y) const
| Converts device x, y coordinates to relative logical coordinates taking into account all applied transformations like the current mapping mode, scale factors, affine transformation. More...
wxSize | DeviceToLogicalRel (const wxSize &dim) const
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
wxPoint | LogicalToDevice (wxCoord x, wxCoord y) const
| Converts logical (x, y) coordinates to device coordinates taking into account all applied transformations like the current mapping mode, scale factors, device origin, axes orientation, affine transformation. More...
wxPoint | LogicalToDevice (const wxPoint &pt) const
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
wxSize | LogicalToDeviceRel (int x, int y) const
| Converts logical x, y coordinates to relative device coordinates taking into account all applied transformations like the current mapping mode, scale factors, affine transformation. More...
wxSize | LogicalToDeviceRel (const wxSize &dim) const
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | Clear ()
| Clears the device context using the current background brush. More...
void | DrawArc (wxCoord xStart, wxCoord yStart, wxCoord xEnd, wxCoord yEnd, wxCoord xc, wxCoord yc)
| Draws an arc from the given start to the given end point. More...
void | DrawArc (const wxPoint &ptStart, const wxPoint &ptEnd, const wxPoint &centre)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawBitmap (const wxBitmap &bitmap, wxCoord x, wxCoord y, bool useMask=false)
| Draw a bitmap on the device context at the specified point. More...
void | DrawBitmap (const wxBitmap &bmp, const wxPoint &pt, bool useMask=false)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawCheckMark (wxCoord x, wxCoord y, wxCoord width, wxCoord height)
| Draws a check mark inside the given rectangle. More...
void | DrawCheckMark (const wxRect &rect)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawCircle (wxCoord x, wxCoord y, wxCoord radius)
| Draws a circle with the given centre and radius. More...
void | DrawCircle (const wxPoint &pt, wxCoord radius)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawEllipse (wxCoord x, wxCoord y, wxCoord width, wxCoord height)
| Draws an ellipse contained in the rectangle specified either with the given top left corner and the given size or directly. More...
void | DrawEllipse (const wxPoint &pt, const wxSize &size)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawEllipse (const wxRect &rect)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawEllipticArc (wxCoord x, wxCoord y, wxCoord width, wxCoord height, double start, double end)
| Draws an arc of an ellipse. More...
void | DrawEllipticArc (const wxPoint &pt, const wxSize &sz, double sa, double ea)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawIcon (const wxIcon &icon, wxCoord x, wxCoord y)
| Draw an icon on the display (does nothing if the device context is PostScript). More...
void | DrawIcon (const wxIcon &icon, const wxPoint &pt)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawLabel (const wxString &text, const wxBitmap &bitmap, const wxRect &rect, int alignment=wxALIGN_LEFT|wxALIGN_TOP, int indexAccel=-1, wxRect *rectBounding=NULL)
| Draw optional bitmap and the text into the given rectangle and aligns it as specified by alignment parameter; it also will emphasize the character with the given index if it is != -1 and return the bounding rectangle if required. More...
void | DrawLabel (const wxString &text, const wxRect &rect, int alignment=wxALIGN_LEFT|wxALIGN_TOP, int indexAccel=-1)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawLine (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
| Draws a line from the first point to the second. More...
void | DrawLine (const wxPoint &pt1, const wxPoint &pt2)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawLines (int n, const wxPoint points[], wxCoord xoffset=0, wxCoord yoffset=0)
| Draws lines using an array of points of size n adding the optional offset coordinate. More...
void | DrawLines (const wxPointList *points, wxCoord xoffset=0, wxCoord yoffset=0)
| This method uses a list of wxPoints, adding the optional offset coordinate. More...
void | DrawPoint (wxCoord x, wxCoord y)
| Draws a point using the color of the current pen. More...
void | DrawPoint (const wxPoint &pt)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawPolygon (int n, const wxPoint points[], wxCoord xoffset=0, wxCoord yoffset=0, wxPolygonFillMode fill_style=wxODDEVEN_RULE)
| Draws a filled polygon using an array of points of size n, adding the optional offset coordinate. More...
void | DrawPolygon (const wxPointList *points, wxCoord xoffset=0, wxCoord yoffset=0, wxPolygonFillMode fill_style=wxODDEVEN_RULE)
| This method draws a filled polygon using a list of wxPoints, adding the optional offset coordinate. More...
void | DrawPolyPolygon (int n, const int count[], const wxPoint points[], wxCoord xoffset=0, wxCoord yoffset=0, wxPolygonFillMode fill_style=wxODDEVEN_RULE)
| Draws two or more filled polygons using an array of points, adding the optional offset coordinates. More...
void | DrawRectangle (wxCoord x, wxCoord y, wxCoord width, wxCoord height)
| Draws a rectangle with the given corner coordinate and size. More...
void | DrawRectangle (const wxPoint &pt, const wxSize &sz)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawRectangle (const wxRect &rect)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawRotatedText (const wxString &text, wxCoord x, wxCoord y, double angle)
| Draws the text rotated by angle degrees (positive angles are counterclockwise; the full angle is 360 degrees). More...
void | DrawRotatedText (const wxString &text, const wxPoint &point, double angle)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawRoundedRectangle (wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
| Draws a rectangle with the given top left corner, and with the given size. More...
void | DrawRoundedRectangle (const wxPoint &pt, const wxSize &sz, double radius)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawRoundedRectangle (const wxRect &rect, double radius)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawSpline (int n, const wxPoint points[])
| Draws a spline between all given points using the current pen. More...
void | DrawSpline (const wxPointList *points)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawSpline (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord x3, wxCoord y3)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DrawText (const wxString &text, wxCoord x, wxCoord y)
| Draws a text string at the specified point, using the current text font, and the current text foreground and background colours. More...
void | DrawText (const wxString &text, const wxPoint &pt)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | GradientFillConcentric (const wxRect &rect, const wxColour &initialColour, const wxColour &destColour)
| Fill the area specified by rect with a radial gradient, starting from initialColour at the centre of the circle and fading to destColour on the circle outside. More...
void | GradientFillConcentric (const wxRect &rect, const wxColour &initialColour, const wxColour &destColour, const wxPoint &circleCenter)
| Fill the area specified by rect with a radial gradient, starting from initialColour at the centre of the circle and fading to destColour on the circle outside. More...
void | GradientFillLinear (const wxRect &rect, const wxColour &initialColour, const wxColour &destColour, wxDirection nDirection=wxRIGHT)
| Fill the area specified by rect with a linear gradient, starting from initialColour and eventually fading to destColour. More...
bool | FloodFill (wxCoord x, wxCoord y, const wxColour &colour, wxFloodFillStyle style=wxFLOOD_SURFACE)
| Flood fills the device context starting from the given point, using the current brush colour, and using a style: More...
bool | FloodFill (const wxPoint &pt, const wxColour &col, wxFloodFillStyle style=wxFLOOD_SURFACE)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | CrossHair (wxCoord x, wxCoord y)
| Displays a cross hair using the current pen. More...
void | CrossHair (const wxPoint &pt)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | DestroyClippingRegion ()
| Destroys the current clipping region so that none of the DC is clipped. More...
bool | GetClippingBox (wxCoord *x, wxCoord *y, wxCoord *width, wxCoord *height) const
| Gets the rectangle surrounding the current clipping region. More...
bool | GetClippingBox (wxRect &rect) const
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | SetClippingRegion (wxCoord x, wxCoord y, wxCoord width, wxCoord height)
| Sets the clipping region for this device context to the intersection of the given region described by the parameters of this method and the previously set clipping region. More...
void | SetClippingRegion (const wxPoint &pt, const wxSize &sz)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | SetClippingRegion (const wxRect &rect)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
void | SetDeviceClippingRegion (const wxRegion &region)
| Sets the clipping region for this device context. More...
wxCoord | GetCharHeight () const
| Gets the character height of the currently set font. More...
wxCoord | GetCharWidth () const
| Gets the average character width of the currently set font. More...
wxFontMetrics | GetFontMetrics () const
| Returns the various font characteristics. More...
void | GetMultiLineTextExtent (const wxString &string, wxCoord *w, wxCoord *h, wxCoord *heightLine=NULL, const wxFont *font=NULL) const
| Gets the dimensions of the string using the currently selected font. More...
wxSize | GetMultiLineTextExtent (const wxString &string) const
| Gets the dimensions of the string using the currently selected font. More...
bool | GetPartialTextExtents (const wxString &text, wxArrayInt &widths) const
| Fills the widths array with the widths from the beginning of text to the corresponding character of text. More...
void | GetTextExtent (const wxString &string, wxCoord *w, wxCoord *h, wxCoord *descent=NULL, wxCoord *externalLeading=NULL, const wxFont *font=NULL) const
| Gets the dimensions of the string using the currently selected font. More...
wxSize | GetTextExtent (const wxString &string) const
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...
int | GetBackgroundMode () const
| Returns the current background mode: `wxBRUSHSTYLE_SOLID` or `wxBRUSHSTYLE_TRANSPARENT`. More...
const wxFont & | GetFont () const
| Gets the current font. More...
wxLayoutDirection | GetLayoutDirection () const
| Gets the current layout direction of the device context. More...
const wxColour & | GetTextBackground () const
| Gets the current text background colour. More...
const wxColour & | GetTextForeground () const
| Gets the current text foreground colour. More...
void | SetBackgroundMode (int mode)
| Change the current background mode. More...
void | SetFont (const wxFont &font)
| Sets the current font for the DC. More...
void | SetTextBackground (const wxColour &colour)
| Sets the current text background colour for the DC. More...
void | SetTextForeground (const wxColour &colour)
| Sets the current text foreground colour for the DC. More...
void | SetLayoutDirection (wxLayoutDirection dir)
| Sets the current layout direction for the device context. More...
void | CalcBoundingBox (wxCoord x, wxCoord y)
| Adds the specified point to the bounding box which can be retrieved with MinX(), MaxX() and MinY(), MaxY() functions. More...
wxCoord | MaxX () const
| Gets the maximum horizontal extent used in drawing commands so far. More...
wxCoord | MaxY () const
| Gets the maximum vertical extent used in drawing commands so far. More...
wxCoord | MinX () const
| Gets the minimum horizontal extent used in drawing commands so far. More...
wxCoord | MinY () const
| Gets the minimum vertical extent used in drawing commands so far. More...
void | ResetBoundingBox ()
| Resets the bounding box: after a call to this function, the bounding box doesn't contain anything. More...
bool | StartDoc (const wxString &message)
| Starts a document (only relevant when outputting to a printer). More...
void | StartPage ()
| Starts a document page (only relevant when outputting to a printer). More...
void | EndDoc ()
| Ends a document (only relevant when outputting to a printer). More...
void | EndPage ()
| Ends a document page (only relevant when outputting to a printer). More...
bool | Blit (wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height, wxDC *source, wxCoord xsrc, wxCoord ysrc, wxRasterOperationMode logicalFunc=wxCOPY, bool useMask=false, wxCoord xsrcMask=wxDefaultCoord, wxCoord ysrcMask=wxDefaultCoord)
| Copy from a source DC to this DC. More...
bool | StretchBlit (wxCoord xdest, wxCoord ydest, wxCoord dstWidth, wxCoord dstHeight, wxDC *source, wxCoord xsrc, wxCoord ysrc, wxCoord srcWidth, wxCoord srcHeight, wxRasterOperationMode logicalFunc=wxCOPY, bool useMask=false, wxCoord xsrcMask=wxDefaultCoord, wxCoord ysrcMask=wxDefaultCoord)
| Copy from a source DC to this DC possibly changing the scale. More...
const wxBrush & | GetBackground () const
| Gets the brush used for painting the background. More...
const wxBrush & | GetBrush () const
| Gets the current brush. More...
const wxPen & | GetPen () const
| Gets the current pen. More...
void | SetBackground (const wxBrush &brush)
| Sets the current background brush for the DC. More...
void | SetBrush (const wxBrush &brush)
| Sets the current brush for the DC. More...
void | SetPen (const wxPen &pen)
| Sets the current pen for the DC. More...
bool | CanUseTransformMatrix () const
| Check if the use of transformation matrix is supported by the current system. More...
bool | SetTransformMatrix (const wxAffineMatrix2D &matrix)
| Set the transformation matrix. More...
wxAffineMatrix2D | GetTransformMatrix () const
| Return the transformation matrix used by this device context. More...
void | ResetTransformMatrix ()
| Revert the transformation matrix to identity matrix. More...
bool | CanDrawBitmap () const
| Does the DC support drawing bitmaps? More...
bool | CanGetTextExtent () const
| Does the DC support calculating the size required to draw text? More...
void | GetLogicalOrigin (wxCoord *x, wxCoord *y) const
| Return the coordinates of the logical point (0, 0). More...
wxPoint | GetLogicalOrigin () const
| Return the coordinates of the logical point (0, 0). More...
Public Member Functions inherited from wxObject
| wxObject ()
| Default ctor; initializes to NULL the internal reference data. More...
| wxObject (const wxObject &other)
| Copy ctor. More...
virtual | ~wxObject ()
| Destructor. More...
virtual wxClassInfo * | GetClassInfo () const
| This virtual function is redefined for every class that requires run-time type information, when using the wxDECLARE_CLASS macro (or similar). More...
wxObjectRefData * | GetRefData () const
| Returns the wxObject::m_refData pointer, i.e. the data referenced by this object. More...
bool | IsKindOf (const wxClassInfo *info) const
| Determines whether this class is a subclass of (or the same class as) the given class. More...
bool | IsSameAs (const wxObject &obj) const
| Returns true if this object has the same data pointer as obj. More...
void | Ref (const wxObject &clone)
| Makes this object refer to the data in clone. More...
void | SetRefData (wxObjectRefData *data)
| Sets the wxObject::m_refData pointer. More...
void | UnRef ()
| Decrements the reference count in the associated data, and if it is zero, deletes the data. More...
void | UnShare ()
| This is the same of AllocExclusive() but this method is public. More...
void | operator delete (void *buf)
| The delete operator is defined for debugging versions of the library only, when the identifier `__WXDEBUG__` is defined. More...
void * | operator new (size_t size, const wxString &filename=NULL, int lineNum=0)
| The new operator is defined for debugging versions of the library only, when the identifier `__WXDEBUG__` is defined. More...

## Additional Inherited Members
Protected Member Functions inherited from wxObject
void | AllocExclusive ()
| Ensure that this object's data is not shared with any other object. More...
virtual wxObjectRefData * | CreateRefData () const
| Creates a new instance of the wxObjectRefData-derived class specific to this object and returns it. More...
virtual wxObjectRefData * | CloneRefData (const wxObjectRefData *data) const
| Creates a new instance of the wxObjectRefData-derived class specific to this object and initializes it copying data. More...
Protected Attributes inherited from wxObject
wxObjectRefData * | m_refData
| Pointer to an object which is the object's reference-counted data. More...

## Constructor & Destructor Documentation

## ◆ wxWindowDC()

wxWindowDC::wxWindowDC | ( | wxWindow * | window | ) |

Constructor.

Pass a pointer to the window on which you wish to paint.