wxbitmaphandler

overview

this is the base class for implementing bitmap file loading/saving, and bitmap creation from data. it is used within wxbitmap and is not normally seen by the application.

if you wish to extend the capabilities of wxbitmap, derive a class from wxbitmaphandler and add the handler using wxbitmap::addhandler in your application initialisation.

derived from

wxobject

include files

<wx/bitmap.h>

see also

wxbitmap, wxicon, wxcursor

members

wxbitmaphandler::wxbitmaphandler
wxbitmaphandler::~wxbitmaphandler
wxbitmaphandler::create
wxbitmaphandler::getname
wxbitmaphandler::getextension
wxbitmaphandler::gettype
wxbitmaphandler::loadfile
wxbitmaphandler::savefile
wxbitmaphandler::setname
wxbitmaphandler::setextension
wxbitmaphandler::settype

wxbitmaphandler::wxbitmaphandler

wxbitmaphandler()

default constructor. in your own default constructor, initialise the members m_name, m_extension and m_type.

wxbitmaphandler::~wxbitmaphandler

~wxbitmaphandler()

destroys the wxbitmaphandler object.

wxbitmaphandler::create

virtual bool create(wxbitmap* bitmap, const void* data, int type, int width, int height, int depth = -1)

creates a bitmap from the given data, which can be of arbitrary type. the wxbitmap object bitmap is manipulated by this function.

parameters

bitmap

the wxbitmap object.

width

the width of the bitmap in pixels.

height

the height of the bitmap in pixels.

depth

the depth of the bitmap in pixels. if this is -1, the screen depth is used.

data

data whose type depends on the value of type.

type

a bitmap type identifier - see wxbitmaphandler::wxbitmaphandler for a list of possible values.

return value

true if the call succeeded, false otherwise (the default).

wxbitmaphandler::getname

const wxstring& getname() const

gets the name of this handler.

wxbitmaphandler::getextension

const wxstring& getextension() const

gets the file extension associated with this handler.

wxbitmaphandler::gettype

long gettype() const

gets the bitmap type associated with this handler.

wxbitmaphandler::loadfile

bool loadfile(wxbitmap* bitmap, const wxstring& name, long type)

loads a bitmap from a file or resource, putting the resulting data into bitmap.

parameters

bitmap

the bitmap object which is to be affected by this operation.

name

either a filename or a windows resource name. the meaning of name is determined by the type parameter.

type

see wxbitmap::wxbitmap for values this can take.

return value

true if the operation succeeded, false otherwise.

see also

wxbitmap::loadfile
wxbitmap::savefile
wxbitmaphandler::savefile

wxbitmaphandler::savefile

bool savefile(wxbitmap* bitmap, const wxstring& name, int type, wxpalette* palette = null)

saves a bitmap in the named file.

parameters

bitmap

the bitmap object which is to be affected by this operation.

name

a filename. the meaning of name is determined by the type parameter.

type

see wxbitmap::wxbitmap for values this can take.

palette

an optional palette used for saving the bitmap.

return value

true if the operation succeeded, false otherwise.

see also

wxbitmap::loadfile
wxbitmap::savefile
wxbitmaphandler::loadfile

wxbitmaphandler::setname

void setname(const wxstring& name)

sets the handler name.

parameters

name

handler name.

wxbitmaphandler::setextension

void setextension(const wxstring& extension)

sets the handler extension.

parameters

extension

handler extension.

wxbitmaphandler::settype

void settype(long type)

sets the handler type.

parameters

name

handler type.