wxClientDC - Functions for wxClientDC class
Please see following description for synopsis
wxClientDC(3) Erlang Module Definition wxClientDC(3)
NAME
wxClientDC - Functions for wxClientDC class
DESCRIPTION
wxClientDC is primarily useful for obtaining information about the win-
dow from outside EVT_PAINT() handler.
Typical use of this class is to obtain the extent of some text string
in order to allocate enough size for a window, e.g.
Note: While wxClientDC may also be used for drawing on the client area
of a window from outside an EVT_PAINT() handler in some ports, this
does not work on all platforms (neither wxOSX nor wxGTK with GTK 3 Way-
land backend support this, so drawing using wxClientDC simply doesn't
have any effect there) and the only portable way of drawing is via
wxPaintDC. To redraw a small part of the window, use wxWin-
dow:refreshRect/3 to invalidate just this part and check wxWin-
dow:getUpdateRegion/1 in the paint event handler to redraw this part
only.
wxClientDC objects should normally be constructed as temporary stack
objects, i.e. don't store a wxClientDC object.
A wxClientDC object is initialized to use the same font and colours as
the window it is associated with.
See: wxDC, wxMemoryDC, wxPaintDC, wxWindowDC, wxScreenDC
This class is derived (and can use functions) from: wxWindowDC wxDC
wxWidgets docs: wxClientDC
DATA TYPES
wxClientDC() = wx:wx_object()
EXPORTS
new(Window) -> wxClientDC()
Types:
Window = wxWindow:wxWindow()
Constructor.
Pass a pointer to the window on which you wish to paint.
destroy(This :: wxClientDC()) -> ok
Destroys the object.
wxWidgets team. wx 2.1.1 wxClientDC(3)