\helpref{wxObject}{wxobject}
+\wxheading{Include files}
+
+<wx/dc.h>
+
\wxheading{See also}
\helpref{Overview}{dcoverview}
\membersection{wxDC::Blit}\label{wxdcblit}
-\func{bool}{Blit}{\param{long}{ xdest}, \param{long}{ ydest}, \param{long}{ width}, \param{long}{ height},
- \param{wxDC* }{source}, \param{long}{ xsrc}, \param{long}{ ysrc}, \param{int}{ logicalFunc},
- \param{bool }{useMask}}
+\func{bool}{Blit}{\param{wxCoord}{ xdest}, \param{wxCoord}{ ydest}, \param{wxCoord}{ width}, \param{wxCoord}{ height},
+ \param{wxDC* }{source}, \param{wxCoord}{ xsrc}, \param{wxCoord}{ ysrc}, \param{int}{ logicalFunc = wxCOPY},
+ \param{bool }{useMask = FALSE}}
Copy from a source DC to this DC, specifying the destination
coordinates, size of area to copy, source DC, source coordinates, and
See \helpref{wxMemoryDC}{wxmemorydc} for typical usage.
-wxheading{See also}
+\wxheading{See also}
\helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}
\membersection{wxDC::CrossHair}\label{wxdccrosshair}
-\func{void}{CrossHair}{\param{long}{ x}, \param{long}{ y}}
+\func{void}{CrossHair}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
Displays a cross hair using the current pen. This is a vertical
and horizontal line the height and width of the window, centred
\membersection{wxDC::DeviceToLogicalX}\label{wxdcdevicetologicalx}
-\func{long}{DeviceToLogicalX}{\param{long}{ x}}
+\func{wxCoord}{DeviceToLogicalX}{\param{wxCoord}{ x}}
Convert device X coordinate to logical coordinate, using the current
mapping mode.
\membersection{wxDC::DeviceToLogicalXRel}\label{wxdcdevicetologicalxrel}
-\func{long}{DeviceToLogicalXRel}{\param{long}{ x}}
+\func{wxCoord}{DeviceToLogicalXRel}{\param{wxCoord}{ x}}
Convert device X coordinate to relative logical coordinate, using the current
mapping mode. Use this function for converting a width, for example.
\membersection{wxDC::DeviceToLogicalY}\label{wxdcdevicetologicaly}
-\func{long}{DeviceToLogicalY}{\param{long}{ y}}
+\func{wxCoord}{DeviceToLogicalY}{\param{wxCoord}{ y}}
Converts device Y coordinate to logical coordinate, using the current
mapping mode.
\membersection{wxDC::DeviceToLogicalYRel}\label{wxdcdevicetologicalyrel}
-\func{long}{DeviceToLogicalYRel}{\param{long}{ y}}
+\func{wxCoord}{DeviceToLogicalYRel}{\param{wxCoord}{ y}}
Convert device Y coordinate to relative logical coordinate, using the current
mapping mode. Use this function for converting a height, for example.
\membersection{wxDC::DrawArc}\label{wxdcdrawarc}
-\func{void}{DrawArc}{\param{long}{ x1}, \param{long}{ y1}, \param{long}{ x2}, \param{long}{ y2}, \param{double}{ xc}, \param{double}{ yc}}
+\func{void}{DrawArc}{\param{wxCoord}{ x1}, \param{wxCoord}{ y1}, \param{wxCoord}{ x2}, \param{wxCoord}{ y2}, \param{double}{ xc}, \param{double}{ yc}}
Draws an arc of a circle, centred on ({\it xc, yc}), with starting point ({\it x1, y1})
and ending at ({\it x2, y2}). The current pen is used for the outline
The arc is drawn in an anticlockwise direction from the start point to the end point.
+\membersection{wxDC::DrawBitmap}\label{wxdcdrawbitmap}
+
+\func{void}{DrawBitmap}{\param{const wxBitmap\&}{ bitmap}, \param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{bool}{ transparent}}
+
+Draw a bitmap on the device context at the specified point. If {\it transparent} is TRUE and the bitmap has
+a transparency mask, the bitmap will be drawn transparently.
+
+When drawing a mono-bitmap, the current text foreground colour will be used to draw the foreground
+of the bitmap (all bits set to 1), and the current text background colour to draw the background
+(all bits set to 0). See also \helpref{SetTextForeground}{wxdcsettextforeground},
+\helpref{SetTextBackground}{wxdcsettextbackground} and \helpref{wxMemoryDC}{wxmemorydc}.
+
\membersection{wxDC::DrawEllipse}\label{wxdcdrawellipse}
-\func{void}{DrawEllipse}{\param{long}{ x}, \param{long}{ y}, \param{long}{ width}, \param{long}{ height}}
+\func{void}{DrawEllipse}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
Draws an ellipse contained in the rectangle with the given top left corner, and with the
given size. The current pen is used for the outline and the current brush for
\membersection{wxDC::DrawEllipticArc}\label{wxdcdrawellipticarc}
-\func{void}{DrawEllipticArc}{\param{long}{ x}, \param{long}{ y}, \param{long}{ width}, \param{long}{ height},
+\func{void}{DrawEllipticArc}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height},
\param{double}{ start}, \param{double}{ end}}
-Draws an arc of an ellipse. The current pen is used for drawing the arc and
+Draws an arc of an ellipse. The current pen is used for drawing the arc and
the current brush is used for drawing the pie. This function is currently only available for
X window and PostScript device contexts.
{\it x} and {\it y} specify the x and y coordinates of the upper-left corner of the rectangle that contains
the ellipse.
-{\it width} and {\it height} specify the width and height of the rectangle that contains
+{\it width} and {\it height} specify the width and height of the rectangle that contains
the ellipse.
{\it start} and {\it end} specify the start and end of the arc relative to the three-o'clock
\membersection{wxDC::DrawIcon}\label{wxdcdrawicon}
-\func{void}{DrawIcon}{\param{const wxIcon\&}{ icon}, \param{long}{ x}, \param{long}{ y}}
+\func{void}{DrawIcon}{\param{const wxIcon\&}{ icon}, \param{wxCoord}{ x}, \param{wxCoord}{ y}}
Draw an icon on the display (does nothing if the device context is PostScript).
This can be the simplest way of drawing bitmaps on a window.
\membersection{wxDC::DrawLine}\label{wxdcdrawline}
-\func{void}{DrawLine}{\param{long}{ x1}, \param{long}{ y1}, \param{long}{ x2}, \param{long}{ y2}}
+\func{void}{DrawLine}{\param{wxCoord}{ x1}, \param{wxCoord}{ y1}, \param{wxCoord}{ x2}, \param{wxCoord}{ y2}}
Draws a line from the first point to the second. The current pen is used
for drawing the line.
\membersection{wxDC::DrawLines}\label{wxdcdrawlines}
-\func{void}{DrawLines}{\param{int}{ n}, \param{wxPoint}{ points[]}, \param{long}{ xoffset = 0}, \param{long}{ yoffset = 0}}
+\func{void}{DrawLines}{\param{int}{ n}, \param{wxPoint}{ points[]}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0}}
-\func{void}{DrawLines}{\param{wxList *}{points}, \param{long}{ xoffset = 0}, \param{long}{ yoffset = 0}}
+\func{void}{DrawLines}{\param{wxList *}{points}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0}}
Draws lines using an array of {\it points} of size {\it n}, or list of
pointers to points, adding the optional offset coordinate. The current
pen is used for drawing the lines. The programmer is responsible for
deleting the list of points.
+\pythonnote{The wxPython version of this method accepts a Python list
+of wxPoint objects.}
+
\membersection{wxDC::DrawPolygon}\label{wxdcdrawpolygon}
-\func{void}{DrawPolygon}{\param{int}{ n}, \param{wxPoint}{ points[]}, \param{long}{ xoffset = 0}, \param{long}{ yoffset = 0},\\
+\func{void}{DrawPolygon}{\param{int}{ n}, \param{wxPoint}{ points[]}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0},\\
\param{int }{fill\_style = wxODDEVEN\_RULE}}
-\func{void}{DrawPolygon}{\param{wxList *}{points}, \param{long}{ xoffset = 0}, \param{long}{ yoffset = 0},\\
+\func{void}{DrawPolygon}{\param{wxList *}{points}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0},\\
\param{int }{fill\_style = wxODDEVEN\_RULE}}
Draws a filled polygon using an array of {\it points} of size {\it n},
Note that wxWindows automatically closes the first and last points.
+\pythonnote{The wxPython version of this method accepts a Python list
+of wxPoint objects.}
+
\membersection{wxDC::DrawPoint}\label{wxdcdrawpoint}
-\func{void}{DrawPoint}{\param{long}{ x}, \param{long}{ y}}
+\func{void}{DrawPoint}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
Draws a point using the current pen.
\membersection{wxDC::DrawRectangle}\label{wxdcdrawrectangle}
-\func{void}{DrawRectangle}{\param{long}{ x}, \param{long}{ y}, \param{long}{ width}, \param{long}{ height}}
+\func{void}{DrawRectangle}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
Draws a rectangle with the given top left corner, and with the given
size. The current pen is used for the outline and the current brush
for filling the shape.
+\membersection{wxDC::DrawRotatedText}\label{wxdcdrawrotatedtext}
+
+\func{void}{DrawRotatedText}{\param{const wxString\& }{text}, \param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{double}{ angle}}
+
+Draws the text rotated by {\it angle} degrees.
+
+\wxheading{See also}
+
+\helpref{DrawText}{wxdcdrawtext}
+
\membersection{wxDC::DrawRoundedRectangle}\label{wxdcdrawroundedrectangle}
-\func{void}{DrawRoundedRectangle}{\param{long}{ x}, \param{long}{ y}, \param{long}{ width}, \param{long}{ height}, \param{double}{ radius = 20}}
+\func{void}{DrawRoundedRectangle}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}, \param{double}{ radius = 20}}
Draws a rectangle with the given top left corner, and with the given
size. The corners are quarter-circles using the given radius. The
using a series of lines, using an algorithm taken from the X drawing
program `XFIG'.
-\func{void}{DrawSpline}{\param{long}{ x1}, \param{long}{ y1}, \param{long}{ x2}, \param{long}{ y2}, \param{long}{ x3}, \param{long}{ y3}}
+\func{void}{DrawSpline}{\param{wxCoord}{ x1}, \param{wxCoord}{ y1}, \param{wxCoord}{ x2}, \param{wxCoord}{ y2}, \param{wxCoord}{ x3}, \param{wxCoord}{ y3}}
Draws a three-point spline using the current pen.
+\pythonnote{The wxPython version of this method accepts a Python list
+of wxPoint objects.}
+
\membersection{wxDC::DrawText}\label{wxdcdrawtext}
-\func{void}{DrawText}{\param{const wxString\& }{text}, \param{long}{ x}, \param{long}{ y}}
+\func{void}{DrawText}{\param{const wxString\& }{text}, \param{wxCoord}{ x}, \param{wxCoord}{ y}}
Draws a text string at the specified point, using the current text font,
and the current text foreground and background colours.
\membersection{wxDC::FloodFill}\label{wxdcfloodfill}
-\func{void}{FloodFill}{\param{long}{ x}, \param{long}{ y}, \param{wxColour *}{colour}, \param{int}{ style=wxFLOOD\_SURFACE}}
+\func{void}{FloodFill}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxColour *}{colour}, \param{int}{ style=wxFLOOD\_SURFACE}}
Flood fills the device context starting from the given point, in the given colour,
and using a style:
\membersection{wxDC::GetBackground}\label{wxdcgetbackground}
-\func{wxBrush *}{GetBackground}{\void}
+\func{wxBrush\&}{GetBackground}{\void}
Gets the brush used for painting the background (see \helpref{wxDC::SetBackground}{wxdcsetbackground}).
\membersection{wxDC::GetBrush}\label{wxdcgetbrush}
-\func{wxBrush *}{GetBrush}{\void}
+\func{wxBrush\&}{GetBrush}{\void}
Gets the current brush (see \helpref{wxDC::SetBrush}{wxdcsetbrush}).
\membersection{wxDC::GetCharHeight}\label{wxdcgetcharheight}
-\func{long}{GetCharHeight}{\void}
+\func{wxCoord}{GetCharHeight}{\void}
Gets the character height of the currently set font.
\membersection{wxDC::GetCharWidth}\label{wxdcgetcharwidth}
-\func{long}{GetCharWidth}{\void}
+\func{wxCoord}{GetCharWidth}{\void}
Gets the average character width of the currently set font.
\membersection{wxDC::GetClippingBox}\label{wxdcgetclippingbox}
-\func{void}{GetClippingBox}{\param{long}{ *x}, \param{long}{ *y}, \param{long}{ *width}, \param{long}{ *height}}
+\func{void}{GetClippingBox}{\param{wxCoord}{ *x}, \param{wxCoord}{ *y}, \param{wxCoord}{ *width}, \param{wxCoord}{ *height}}
Gets the rectangle surrounding the current clipping region.
+\pythonnote{No arguments are required and the four values defining the
+rectangle are returned as a tuple.}
+
\membersection{wxDC::GetFont}\label{wxdcgetfont}
-\func{wxFont *}{GetFont}{\void}
+\func{wxFont\&}{GetFont}{\void}
Gets the current font (see \helpref{wxDC::SetFont}{wxdcsetfont}).
\membersection{wxDC::GetPen}\label{wxdcgetpen}
-\func{wxPen *}{GetPen}{\void}
+\func{wxPen\&}{GetPen}{\void}
Gets the current pen (see \helpref{wxDC::SetPen}{wxdcsetpen}).
\membersection{wxDC::GetPixel}\label{wxdcgetpixel}
-\func{bool}{GetPixel}{\param{long}{ x}, \param{long}{ y}, \param{wxColour *}{colour}}
+\func{bool}{GetPixel}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxColour *}{colour}}
Sets {\it colour} to the colour at the specified location. Windows only; an X implementation
-is being worked on. Not available for wxPostScriptDC or wxMetaFileDC.
+is being worked on. Not available for wxPostScriptDC or wxMetafileDC.
+
+\pythonnote{For wxPython the wxColour value is returned and is not
+required as a parameter.}
\membersection{wxDC::GetSize}\label{wxdcgetsize}
-\func{void}{GetSize}{\param{long *}{width}, \param{long *}{height}}
+\func{void}{GetSize}{\param{wxCoord *}{width}, \param{wxCoord *}{height}}
For a PostScript device context, this gets the maximum size of graphics
drawn so far on the device context.
printer page:
\begin{verbatim}
- long w, h;
+ wxCoord w, h;
dc.GetSize(&w, &h);
double scaleX=(double)(maxX/w);
double scaleY=(double)(maxY/h);
dc.SetUserScale(min(scaleX,scaleY),min(scaleX,scaleY));
\end{verbatim}
+\pythonnote{In place of a single overloaded method name, wxPython
+implements the following methods:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf GetSize()}}{Returns a wxSize}
+\twocolitem{{\bf GetSizeTuple()}}{Returns a 2-tuple (width, height)}
+\end{twocollist}}
+}
+
\membersection{wxDC::GetTextBackground}\label{wxdcgettextbackground}
\func{wxColour\&}{GetTextBackground}{\void}
\membersection{wxDC::GetTextExtent}\label{wxdcgettextextent}
-\func{void}{GetTextExtent}{\param{const wxString\& }{string}, \param{long *}{w}, \param{long *}{h},\\
- \param{long *}{descent = NULL}, \param{long *}{externalLeading = NULL}, \param{wxFont *}{font = NULL}}
+\func{void}{GetTextExtent}{\param{const wxString\& }{string}, \param{wxCoord *}{w}, \param{wxCoord *}{h},\\
+ \param{wxCoord *}{descent = NULL}, \param{wxCoord *}{externalLeading = NULL}, \param{wxFont *}{font = NULL}}
Gets the dimensions of the string using the currently selected font.
\rtfsp{\it string} is the text string to measure, {\it w} and {\it h} are
See also \helpref{wxFont}{wxfont}, \helpref{wxDC::SetFont}{wxdcsetfont}.
+\pythonnote{The following methods are implemented in wxPython:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf GetTextExtent(string)}}{Returns a 2-tuple, (width, height)}
+\twocolitem{{\bf GetFullTextExtent(string, font=NULL)}}{Returns a
+4-tuple, (width, height, descent, externalLeading) }
+\end{twocollist}}
+}
+
\membersection{wxDC::GetTextForeground}\label{wxdcgettextforeground}
\func{wxColour\&}{GetTextForeground}{\void}
Gets the current text foreground colour (see \helpref{wxDC::SetTextForeground}{wxdcsettextforeground}).
+
+\membersection{wxDC::GetUserScale}\label{wxdcgetuserscale}
+
+\func{void}{GetUserScale}{\param{double}{ *x}, \param{double}{ *y}}
+
+Gets the current user scale factor (set by \helpref{SetUserScale}{wxdcsetuserscale}).
+
+
\membersection{wxDC::LogicalToDeviceX}\label{wxdclogicaltodevicex}
-\func{long}{LogicalToDeviceX}{\param{long}{ x}}
+\func{wxCoord}{LogicalToDeviceX}{\param{wxCoord}{ x}}
Converts logical X coordinate to device coordinate, using the current
mapping mode.
\membersection{wxDC::LogicalToDeviceXRel}\label{wxdclogicaltodevicexrel}
-\func{long}{LogicalToDeviceXRel}{\param{long}{ x}}
+\func{wxCoord}{LogicalToDeviceXRel}{\param{wxCoord}{ x}}
Converts logical X coordinate to relative device coordinate, using the current
mapping mode. Use this for converting a width, for example.
\membersection{wxDC::LogicalToDeviceY}\label{wxdclogicaltodevicey}
-\func{long}{LogicalToDeviceY}{\param{long}{ y}}
+\func{wxCoord}{LogicalToDeviceY}{\param{wxCoord}{ y}}
Converts logical Y coordinate to device coordinate, using the current
mapping mode.
\membersection{wxDC::LogicalToDeviceYRel}\label{wxdclogicaltodeviceyrel}
-\func{long}{LogicalToDeviceYRel}{\param{long}{ y}}
+\func{wxCoord}{LogicalToDeviceYRel}{\param{wxCoord}{ y}}
Converts logical Y coordinate to relative device coordinate, using the current
mapping mode. Use this for converting a height, for example.
\membersection{wxDC::MaxX}\label{wxdcmaxx}
-\func{long}{MaxX}{\void}
+\func{wxCoord}{MaxX}{\void}
Gets the maximum horizontal extent used in drawing commands so far.
\membersection{wxDC::MaxY}\label{wxdcmaxy}
-\func{long}{MaxY}{\void}
+\func{wxCoord}{MaxY}{\void}
Gets the maximum vertical extent used in drawing commands so far.
\membersection{wxDC::MinX}\label{wxdcminx}
-\func{long}{MinX}{\void}
+\func{wxCoord}{MinX}{\void}
Gets the minimum horizontal extent used in drawing commands so far.
\membersection{wxDC::MinY}\label{wxdcminy}
-\func{long}{MinY}{\void}
+\func{wxCoord}{MinY}{\void}
Gets the minimum vertical extent used in drawing commands so far.
\membersection{wxDC::SetDeviceOrigin}\label{wxdcsetdeviceorigin}
-\func{void}{SetDeviceOrigin}{\param{long}{ x}, \param{long}{ y}}
+\func{void}{SetDeviceOrigin}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
Sets the device origin (i.e., the origin in pixels after scaling has been
applied).
\membersection{wxDC::SetClippingRegion}\label{wxdcsetclippingregion}
-\func{void}{SetClippingRegion}{\param{long}{ x}, \param{long}{ y}, \param{long}{ width}, \param{long}{ height}}
+\func{void}{SetClippingRegion}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
-Sets the clipping region for the DC. The clipping region is a rectangular area
-to which drawing is restricted. Possible uses for the clipping region are for clipping text
+\func{void}{SetClippingRegion}{\param{const wxRegion\&}{ region}}
+
+Sets the clipping region for the DC. The clipping region is an area
+to which drawing is restricted. Possible uses for the clipping region are for clipping text
or for speeding up window redraws when only a known area of the screen is damaged.
-See also \helpref{wxDC::DestroyClippingRegion}{wxdcdestroyclippingregion}.
+\wxheading{See also}
+
+\helpref{wxDC::DestroyClippingRegion}{wxdcdestroyclippingregion}, \helpref{wxRegion}{wxregion}
\membersection{wxDC::SetPalette}\label{wxdcsetpalette}
See also \helpref{wxBrush}{wxbrush}.
+See also \helpref{wxMemoryDC}{wxmemorydc} for the interpretation of colours
+when drawing into a monochrome bitmap.
+
\membersection{wxDC::SetFont}\label{wxdcsetfont}
\func{void}{SetFont}{\param{const wxFont\& }{font}}
The default is wxCOPY, which simply draws with the current colour.
The others combine the current colour and the background using a
-logical operation. wxXOR is commonly used for drawing rubber bands or
+logical operation. wxINVERT is commonly used for drawing rubber bands or
moving outlines, since drawing twice reverts to the original colour.
\membersection{wxDC::SetMapMode}\label{wxdcsetmapmode}
The mapping mode can be one of the following:
\begin{twocollist}\itemsep=0pt
-\twocolitem{MM\_TWIPS}{Each logical unit is 1/20 of a point, or 1/1440 of
+\twocolitem{wxMM\_TWIPS}{Each logical unit is 1/20 of a point, or 1/1440 of
an inch.}
-\twocolitem{MM\_POINTS}{Each logical unit is a point, or 1/72 of an inch.}
-\twocolitem{MM\_METRIC}{Each logical unit is 1 mm.}
-\twocolitem{MM\_LOMETRIC}{Each logical unit is 1/10 of a mm.}
-\twocolitem{MM\_TEXT}{Each logical unit is 1 pixel.}
+\twocolitem{wxMM\_POINTS}{Each logical unit is a point, or 1/72 of an inch.}
+\twocolitem{wxMM\_METRIC}{Each logical unit is 1 mm.}
+\twocolitem{wxMM\_LOMETRIC}{Each logical unit is 1/10 of a mm.}
+\twocolitem{wxMM\_TEXT}{Each logical unit is 1 pixel.}
\end{twocollist}
\membersection{wxDC::SetOptimization}\label{wxsetoptimization}
If the argument is wxNullPen, the current pen is selected out of the device
context, and the original pen restored.
+See also \helpref{wxMemoryDC}{wxmemorydc} for the interpretation of colours
+when drawing into a monochrome bitmap.
+
\membersection{wxDC::SetTextBackground}\label{wxdcsettextbackground}
\func{void}{SetTextBackground}{\param{const wxColour\& }{colour}}
Sets the current text foreground colour for the DC.
+See also \helpref{wxMemoryDC}{wxmemorydc} for the interpretation of colours
+when drawing into a monochrome bitmap.
+
\membersection{wxDC::SetUserScale}\label{wxdcsetuserscale}
\func{void}{SetUserScale}{\param{double}{ xScale}, \param{double}{ yScale}}
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