Implement monitoring of file descriptors in wxMotif event loop.

[wxWidgets.git] / interface / wx / dc.h

diff --git a/interface/wx/dc.h b/interface/wx/dc.h
index eeeb907f6d05aaa5750f565ff48442cf73895ff7..49e0f0efc01a6f38438ccb2aa4476725243de7e7 100644 (file)
--- a/interface/wx/dc.h
+++ b/interface/wx/dc.h
@@ -73,7 +73,7 @@ enum wxMappingMode
     wxMM_TWIPS,
 
     /**
     wxMM_TWIPS,
 
     /**

-        Each logical unit is a @e "printer point" i.e. 1/72 of an inch.
+        Each logical unit is a @e "printer point" i.e.\ 1/72 of an inch.

         Equivalent to about 353 micrometers.
     */
     wxMM_POINTS
         Equivalent to about 353 micrometers.
     */
     wxMM_POINTS


@@ -409,27 +409,17 @@ public:
         Draws lines using an array of points of size @a n adding the optional
         offset coordinate. The current pen is used for drawing the lines.
 
         Draws lines using an array of points of size @a n adding the optional
         offset coordinate. The current pen is used for drawing the lines.
 

-        @beginWxPythonOnly
-        The wxPython version of this method accepts a Python list of wxPoint
-        objects.
-        @endWxPythonOnly
-

         @beginWxPerlOnly
         Not supported by wxPerl.
         @endWxPerlOnly
     */
         @beginWxPerlOnly
         Not supported by wxPerl.
         @endWxPerlOnly
     */

-    void DrawLines(int n, wxPoint points[], wxCoord xoffset = 0,
+    void DrawLines(int n, const wxPoint points[], wxCoord xoffset = 0,

                    wxCoord yoffset = 0);
     /**
         This method uses a list of wxPoints, adding the optional offset
         coordinate. The programmer is responsible for deleting the list of
         points.
 
                    wxCoord yoffset = 0);
     /**
         This method uses a list of wxPoints, adding the optional offset
         coordinate. The programmer is responsible for deleting the list of
         points.
 

-        @beginWxPythonOnly
-        The wxPython version of this method accepts a Python list of wxPoint
-        objects.
-        @endWxPythonOnly
-

         @beginWxPerlOnly
         The wxPerl version of this method accepts
         as its first parameter a reference to an array
         @beginWxPerlOnly
         The wxPerl version of this method accepts
         as its first parameter a reference to an array


@@ -465,7 +455,7 @@ public:
         Not supported by wxPerl.
         @endWxPerlOnly
     */
         Not supported by wxPerl.
         @endWxPerlOnly
     */

-    void DrawPolygon(int n, wxPoint points[], wxCoord xoffset = 0,
+    void DrawPolygon(int n, const wxPoint points[], wxCoord xoffset = 0,

                      wxCoord yoffset = 0,
                      wxPolygonFillMode fill_style = wxODDEVEN_RULE);
     /**
                      wxCoord yoffset = 0,
                      wxPolygonFillMode fill_style = wxODDEVEN_RULE);
     /**


@@ -481,11 +471,6 @@ public:
 
         The programmer is responsible for deleting the list of points.
 
 
         The programmer is responsible for deleting the list of points.
 

-        @beginWxPythonOnly
-        The wxPython version of this method accepts a Python list of wxPoint
-        objects.
-        @endWxPythonOnly
-

         @beginWxPerlOnly
         The wxPerl version of this method accepts
         as its first parameter a reference to an array
         @beginWxPerlOnly
         The wxPerl version of this method accepts
         as its first parameter a reference to an array


@@ -518,12 +503,8 @@ public:
         call to DrawPolyPolygon() must be closed. Unlike polygons created by
         the DrawPolygon() member function, the polygons created by this
         method are not closed automatically.
         call to DrawPolyPolygon() must be closed. Unlike polygons created by
         the DrawPolygon() member function, the polygons created by this
         method are not closed automatically.

-
-        @beginWxPythonOnly
-        Not implemented yet.
-        @endWxPythonOnly

     */
     */

-    void DrawPolyPolygon(int n, int count[], wxPoint points[],
+    void DrawPolyPolygon(int n, const int count[], const wxPoint points[],

                          wxCoord xoffset = 0, wxCoord yoffset = 0,
                          wxPolygonFillMode fill_style = wxODDEVEN_RULE);
 
                          wxCoord xoffset = 0, wxCoord yoffset = 0,
                          wxPolygonFillMode fill_style = wxODDEVEN_RULE);
 


@@ -594,16 +575,11 @@ public:
     /**
         Draws a spline between all given points using the current pen.
 
     /**
         Draws a spline between all given points using the current pen.
 

-        @beginWxPythonOnly
-        The wxPython version of this method accepts a Python list of wxPoint
-        objects.
-        @endWxPythonOnly
-

         @beginWxPerlOnly
         Not supported by wxPerl.
         @endWxPerlOnly
     */
         @beginWxPerlOnly
         Not supported by wxPerl.
         @endWxPerlOnly
     */

-    void DrawSpline(int n, wxPoint points[]);
+    void DrawSpline(int n, const wxPoint points[]);

 
     /**
         @overload
 
     /**
         @overload


@@ -702,11 +678,21 @@ public:
         - wxFLOOD_BORDER: The area to be flooded is bounded by the given
           colour.
 
         - wxFLOOD_BORDER: The area to be flooded is bounded by the given
           colour.
 

+        Currently this method is not implemented in wxOSX and does nothing
+        there.
+

         @return @false if the operation failed.
 
         @note The present implementation for non-Windows platforms may fail to
               find colour borders if the pixels do not match the colour
               exactly. However the function will still return @true.
         @return @false if the operation failed.
 
         @note The present implementation for non-Windows platforms may fail to
               find colour borders if the pixels do not match the colour
               exactly. However the function will still return @true.

+
+        @note This method shouldn't be used with wxPaintDC under non-Windows
+              platforms as it uses GetPixel() internally and this may give
+              wrong results, notably in wxGTK. If you need to flood fill
+              wxPaintDC, create a temporary wxMemoryDC, flood fill it and then
+              blit it to, or draw as a bitmap on, wxPaintDC. See the example of
+              doing this in the drawing sample and wxBufferedPaintDC class.

     */
     bool FloodFill(wxCoord x, wxCoord y, const wxColour& colour,
                    wxFloodFillStyle style = wxFLOOD_SURFACE);
     */
     bool FloodFill(wxCoord x, wxCoord y, const wxColour& colour,
                    wxFloodFillStyle style = wxFLOOD_SURFACE);


@@ -746,11 +732,6 @@ public:
 
     /**
         Gets the rectangle surrounding the current clipping region.
 
     /**
         Gets the rectangle surrounding the current clipping region.

-
-        @beginWxPythonOnly
-        No arguments are required and the four values defining the rectangle
-        are returned as a tuple.
-        @endWxPythonOnly

     */
     void GetClippingBox(wxCoord *x, wxCoord *y, wxCoord *width, wxCoord *height) const;
 
     */
     void GetClippingBox(wxCoord *x, wxCoord *y, wxCoord *width, wxCoord *height) const;
 


@@ -876,11 +857,6 @@ public:
         function that is faster or more accurate than the generic
         implementation then it should be used instead.
 
         function that is faster or more accurate than the generic
         implementation then it should be used instead.
 

-        @beginWxPythonOnly
-        This method only takes the @a text parameter and returns a Python list
-        of integers.
-        @endWxPythonOnly
-

         @beginWxPerlOnly
         In wxPerl this method only takes the @a text parameter and
         returns the widths as a list of integers.
         @beginWxPerlOnly
         In wxPerl this method only takes the @a text parameter and
         returns the widths as a list of integers.


@@ -907,13 +883,6 @@ public:
 
         @note This function only works with single-line strings.
 
 
         @note This function only works with single-line strings.
 

-        @beginWxPythonOnly
-        The following methods are implemented in wxPython:
-        - GetTextExtent(string) - Returns a 2-tuple, (width, height).
-        - GetFullTextExtent(string, font=NULL) -
-            Returns a 4-tuple, (width, height, descent, externalLeading).
-        @endWxPythonOnly
-

         @beginWxPerlOnly
         In wxPerl this method is implemented as GetTextExtent(string,
         font = undef) returning a 4-element list (width, height,
         @beginWxPerlOnly
         In wxPerl this method is implemented as GetTextExtent(string,
         font = undef) returning a 4-element list (width, height,


@@ -1111,10 +1080,17 @@ public:
     //@{
 
     /**
     //@{
 
     /**

-        Copy from a source DC to this DC, specifying the destination
-        coordinates, size of area to copy, source DC, source coordinates,
-        logical function, whether to use a bitmap mask, and mask source
-        position.
+        Copy from a source DC to this DC.
+
+        With this method you can specify the destination coordinates and the
+        size of area to copy which will be the same for both the source and
+        target DCs. If you need to apply scaling while copying, use
+        StretchBlit().
+
+        Notice that source DC coordinates @a xsrc and @a ysrc are interpreted
+        using the current source DC coordinate system, i.e. the scale, origin
+        position and axis directions are taken into account when transforming
+        them to physical (pixel) coordinates.

 
         @param xdest
             Destination device context x position.
 
         @param xdest
             Destination device context x position.


@@ -1178,10 +1154,18 @@ public:
               wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord);
 
     /**
               wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord);
 
     /**

-        Copy from a source DC to this DC, specifying the destination
-        coordinates, destination size, source DC, source coordinates, size of
-        source area to copy, logical function, whether to use a bitmap mask,
-        and mask source position.
+        Copy from a source DC to this DC possibly changing the scale.
+
+        Unlike Blit(), this method allows to specify different source and
+        destination region sizes, meaning that it can stretch or shrink it
+        while copying. The same can be achieved by changing the scale of the
+        source or target DC but calling this method is simpler and can also be
+        more efficient if the platform provides a native implementation of it.
+
+        The meaning of its other parameters is the same as with Blit(), in
+        particular all source coordinates are interpreted using the source DC
+        coordinate system, i.e. are affected by its scale, origin translation
+        and axis direction.

 
         @param xdest
             Destination device context x position.
 
         @param xdest
             Destination device context x position.


@@ -1241,8 +1225,6 @@ public:
 
         There is partial support for Blit() in wxPostScriptDC, under X.
 
 
         There is partial support for Blit() in wxPostScriptDC, under X.
 

-        StretchBlit() is only implemented under wxMAC and wxMSW.
-

         See wxMemoryDC for typical usage.
 
         @since 2.9.0
         See wxMemoryDC for typical usage.
 
         @since 2.9.0


@@ -1366,9 +1348,8 @@ public:
 
         @note Setting a pixel can be done using DrawPoint().
 
 
         @note Setting a pixel can be done using DrawPoint().
 

-        @beginWxPythonOnly
-        The wxColour value is returned and is not required as a parameter.
-        @endWxPythonOnly
+        @note This method shouldn't be used with wxPaintDC as accessing the DC
+        while drawing can result in unexpected results, notably in wxGTK.

     */
     bool GetPixel(wxCoord x, wxCoord y, wxColour* colour) const;
 
     */
     bool GetPixel(wxCoord x, wxCoord y, wxColour* colour) const;
 


@@ -1393,13 +1374,6 @@ public:
         dc.SetUserScale(min(scaleX, scaleY),min(scaleX, scaleY));
         @endcode
 
         dc.SetUserScale(min(scaleX, scaleY),min(scaleX, scaleY));
         @endcode
 

-        @beginWxPythonOnly
-        In place of a single overloaded method name, wxPython implements the
-        following methods:
-        - GetSize() - Returns a wxSize.
-        - GetSizeWH() - Returns a 2-tuple (width, height).
-        @endWxPythonOnly
-

         @beginWxPerlOnly
         In wxPerl there are two methods instead of a single overloaded
         method:
         @beginWxPerlOnly
         In wxPerl there are two methods instead of a single overloaded
         method:


@@ -1442,7 +1416,7 @@ public:
     bool IsOk() const;
 
     /**
     bool IsOk() const;
 
     /**

-        Sets the x and y axis orientation (i.e., the direction from lowest to
+        Sets the x and y axis orientation (i.e.\ the direction from lowest to

         highest values on the axis). The default orientation is x axis from
         left to right and y axis from top down.
 
         highest values on the axis). The default orientation is x axis from
         left to right and y axis from top down.
 


@@ -1456,7 +1430,7 @@ public:
     void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
 
     /**
     void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
 
     /**

-        Sets the device origin (i.e., the origin in pixels after scaling has
+        Sets the device origin (i.e.\ the origin in pixels after scaling has

         been applied). This function may be useful in Windows printing
         operations for placing a graphic on a page.
     */
         been applied). This function may be useful in Windows printing
         operations for placing a graphic on a page.
     */


@@ -1563,6 +1537,45 @@ public:
 
     //@}
 
 
     //@}
 

+    
+    /**
+        @name query capabilities
+    */
+    //@{
+
+    /**
+       Does the DC support drawing bitmaps?
+    */
+    bool CanDrawBitmap() const;
+
+    /**
+       Does the DC supoprt calculating the size required to draw text?
+    */
+    bool CanGetTextExtent() 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.  (Not all of them do.)
+
+       For example, on Windows the return value is an HDC, on OSX it is a
+       CGContextRef and on wxGTK it will be a GdkDrawable.  If the DC is a
+       wxGCDC then the return value will be the value returned from
+       wxGraphicsContext::GetNativeContext.  A value of NULL is returned if
+       the DC does not have anything that fits the handle concept.
+       
+       @since 2.9.5
+     */
+    void* GetHandle() 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.
+    */
+    wxBitmap GetAsBitmap(const wxRect *subrect = NULL) const;
+

 
     void SetLogicalScale(double x, double y);
     void GetLogicalScale(double *x, double *y) const;
 
     void SetLogicalScale(double x, double y);
     void GetLogicalScale(double *x, double *y) const;


@@ -1577,10 +1590,12 @@ public:
 /**
     @class wxDCClipper
 
 /**
     @class wxDCClipper
 

-    wxDCClipper is a small helper class for setting a clipping region on a wxDC
-    and unsetting it automatically. An object of wxDCClipper class is typically
-    created on the stack so that it is automatically destroyed when the object
-    goes out of scope. A typical usage example:
+    wxDCClipper is a helper class for setting a clipping region on a wxDC
+    during its lifetime.
+
+    An object of wxDCClipper class is typically created on the stack so that it
+    is automatically destroyed when the object goes out of scope. A typical
+    usage example:

 
     @code
     void MyFunction(wxDC& dc)
 
     @code
     void MyFunction(wxDC& dc)


@@ -1597,6 +1612,12 @@ public:
     }
     @endcode
 
     }
     @endcode
 

+    @note Unlike other similar classes such as wxDCFontChanger, wxDCClipper
+        currently doesn't restore the previously active clipping region when it
+        is destroyed but simply resets clipping on the associated wxDC. This
+        may be changed in the future wxWidgets versions but has to be taken
+        into account explicitly in the current one.
+

     @library{wxcore}
     @category{gdi}
 
     @library{wxcore}
     @category{gdi}