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phoenix_title Cursor

A cursor is a small bitmap usually used for denoting where the mouse pointer is, with a picture that might indicate the interpretation of a mouse click.

As with icons, cursors in X and MS Windows are created in a different manner. Therefore, separate cursors will be created for the different environments. Platform-specific methods for creating a Cursor object are catered for, and this is an occasion where conditional compilation will probably be required (see Icon for an example).

A single cursor object may be used in many windows (any subwindow type). The wxWidgets convention is to set the cursor for a window, as in X, rather than to set it globally as in MS Windows, although a global SetCursor function is also available for MS Windows use.

phoenix_title Creating a Custom Cursor

The following is an example of creating a cursor from 32x32 bitmap data (down_bits) and a mask (down_mask) where 1 is black and 0 is white for the bits, and 1 is opaque and 0 is transparent for the mask. It works on Windows and GTK+.

down_bits = [255, 255, 255, 255, 31,
             255, 255, 255, 31, 255, 255, 255, 31, 255, 255, 255,
             31, 255, 255, 255, 31, 255, 255, 255, 31, 255, 255,
             255, 31, 255, 255, 255, 31, 255, 255, 255, 25, 243,
             255, 255, 19, 249, 255, 255, 7, 252, 255, 255, 15, 254,
             255, 255, 31, 255, 255, 255, 191, 255, 255, 255, 255,
             255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
             255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
             255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
             255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
             255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
             255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
             255]

down_mask = [240, 1, 0, 0, 240, 1,
             0, 0, 240, 1, 0, 0, 240, 1, 0, 0, 240, 1, 0, 0, 240, 1,
             0, 0, 240, 1, 0, 0, 240, 1, 0, 0, 255, 31, 0, 0, 255,
             31, 0, 0, 254, 15, 0, 0, 252, 7, 0, 0, 248, 3, 0, 0,
             240, 1, 0, 0, 224, 0, 0, 0, 64, 0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 0, 0, 0]

if wx.Platform == '__WXMSW__':

    down_bitmap = wx.BitmapFromBits(down_bits, 32, 32)
    down_mask_bitmap = wx.BitmapFromBits(down_mask, 32, 32)

    down_bitmap.SetMask(wx.Mask(down_mask_bitmap))
    down_image = down_bitmap.ConvertToImage()
    down_image.SetOption(wx.IMAGE_OPTION_CUR_HOTSPOT_X, 6)
    down_image.SetOption(wx.IMAGE_OPTION_CUR_HOTSPOT_Y, 14)
    down_cursor = wx.Cursor(down_image)

elif wx.Platform == '__WXGTK__':

    down_cursor = wx.Cursor(down_bits, 32, 32, 6, 14,
                            down_mask, wx.WHITE, wx.BLACK)

See also

Bitmap, Icon, Window.SetCursor , SetCursor, StockCursor


class_hierarchy Inheritance Diagram

Inheritance diagram for class Cursor

Inheritance diagram of Cursor


method_summary Methods Summary

__init__ Default constructor.
GetHandle Get the handle for the Cursor. Windows only.
IsOk Returns True if cursor data is present.
SetHandle Set the handle to use for this Cursor. Windows only.
__nonzero__  
_copyFrom For internal use only.

property_summary Properties Summary

Handle See GetHandle and SetHandle

api Class API


class Cursor(GDIObject)

A cursor is a small bitmap usually used for denoting where the mouse pointer is, with a picture that might indicate the interpretation of a mouse click.

Possible constructors:

Cursor()

Cursor(cursorName, type=BITMAP_TYPE_ANY, hotSpotX=0, hotSpotY=0)

Cursor(cursorId)

Cursor(image)

Cursor(cursor)

Methods


__init__(self, *args, **kw)

overload Overloaded Implementations:


__init__ (self)

Default constructor.


__init__ (self, cursorName, type=BITMAP_TYPE_ANY, hotSpotX=0, hotSpotY=0)

Constructs a cursor by passing a string resource name or filename.

The arguments hotSpotX and hotSpotY are only used when there’s no hotspot info in the resource/image-file to load (e.g. when using BITMAP_TYPE_ICO under wxMSW or BITMAP_TYPE_XPM under wxGTK).

Parameters:
  • cursorName (string) – The name of the resource or the image file to load.
  • type (BitmapType) – Icon type to load. It defaults to CURSOR_DEFAULT_TYPE , which is a #define associated to different values on different platforms:

    • under Windows, it defaults to BITMAP_TYPE_CUR_RESOURCE . Other permitted types under Windows are BITMAP_TYPE_CUR (to load a cursor from a .cur cursor file) and BITMAP_TYPE_ICO (to load a cursor from a .ico icon file).
    • under MacOS, it defaults to BITMAP_TYPE_MACCURSOR_RESOURCE ; when specifying a string resource name, first the color cursors ‘crsr’ and then the black/white cursors ‘CURS‘ in the resource chain are scanned through. Note that resource forks are deprecated on OS X so this is only available for legacy reasons and should not be used in new code.
    • under GTK, it defaults to BITMAP_TYPE_XPM . See the Cursor constructor for more info.
    • under X11, it defaults to BITMAP_TYPE_XPM .
    • under Motif, it defaults to BITMAP_TYPE_XBM .
  • hotSpotX (int) – Hotspot x coordinate (relative to the top left of the image).
  • hotSpotY (int) – Hotspot y coordinate (relative to the top left of the image).


__init__ (self, cursorId)

Constructs a cursor using a cursor identifier.

Parameters:cursorId (StockCursor) – A stock cursor identifier. See StockCursor .


__init__ (self, image)

Constructs a cursor from a Image.

If cursor are monochrome on the current platform, colors with the RGB elements all greater than 127 will be foreground, colors less than this background. The mask (if any) will be used to specify the transparent area.

In wxMSW the foreground will be white and the background black. If the cursor is larger than 32x32 it is resized.

In wxGTK, colour cursors and alpha channel are supported (starting from GTK+ 2.2). Otherwise the two most frequent colors will be used for foreground and background. In any case, the cursor will be displayed at the size of the image.

Under Mac (Cocoa), large cursors are supported.

Notice that the image can define the cursor hot spot. To set it you need to use Image.SetOption with IMAGE_OPTION_CUR_HOTSPOT_X or IMAGE_OPTION_CUR_HOTSPOT_Y , e.g.

image.SetOption(wx.IMAGE_OPTION_CUR_HOTSPOT_X, hotSpotX)
image.SetOption(wx.IMAGE_OPTION_CUR_HOTSPOT_X, hotSpotY)
Parameters:image (Image) –


__init__ (self, cursor)

Copy constructor, uses reference counting.

Parameters:cursor (Cursor) – Pointer or reference to a cursor to copy.



GetHandle(self)

Get the handle for the Cursor. Windows only.

Return type:long

IsOk(self)

Returns True if cursor data is present.

Return type:bool

SetHandle(self, handle)

Set the handle to use for this Cursor. Windows only.


__nonzero__(self)
Return type:int

_copyFrom(self, other)

For internal use only.


Properties


Handle

See GetHandle and SetHandle

© Copyright 2012, Andrea Gavana. Created using Sphinx 1.2pre.