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)