remove wxTextAttr::CreateFont(); return wxNullFont from GetFont() if we have no font...

[wxWidgets.git] / interface / display.h

/////////////////////////////////////////////////////////////////////////////
// Name:        display.h
// Purpose:     documentation for wxDisplay class
// Author:      wxWidgets team
// RCS-ID:      $Id$
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

/**
    @class wxDisplay
    @wxheader{display.h}

    Determines the sizes and locations of displays connected to the system.

    @library{wxcore}
    @category{FIXME}

    @seealso
    wxClientDisplayRect, wxDisplaySize, wxDisplaySizeMM
*/
class wxDisplay
{
public:
    /**
        Constructor, setting up a wxDisplay instance with the specified display.
        
        @param index
            The index of the display to use.  This must be non-negative
            and lower than the value returned by GetCount().
    */
    wxDisplay(unsigned index = 0);

    /**
        Destructor.
    */
    ~wxDisplay();

    /**
        Changes the video mode of this display to the mode specified
        in the mode parameter.
        If wxDefaultVideoMode is passed in as the mode parameter,
        the defined behaviour is that wxDisplay will reset the video
        mode to the default mode used by the display.  On Windows,
        the behavior is normal.  However, there are differences on other
        platforms. On Unix variations using X11 extensions it should
        behave as defined, but some irregularities may occur.
        On wxMac passing in wxDefaultVideoMode as the mode
        parameter does nothing.  This happens because carbon
        no longer has access to DMUseScreenPrefs, an undocumented
        function that changed the video mode to the system
        default by using the system's 'scrn' resource.
    */
    bool ChangeMode(const wxVideoMode& mode = wxDefaultVideoMode);

    /**
        Returns the client area of the display. The client area is the part of the
        display available for the normal (non full screen) windows, usually it is the
        same as GetGeometry() but it could be less if
        there is a taskbar (or equivalent) on this display.
    */
    wxRect GetClientArea();

    /**
        Returns the number of connected displays.
    */
    static unsigned GetCount();

    /**
        Returns the current video mode that this display is in.
    */
    wxVideoMode GetCurrentMode();

    /**
        Returns the bit depth of the display whose index was passed to the constructor.
    */
    int GetDepth();

    /**
        Returns the index of the display on which the given point lies.  Returns
        @c wxNOT_FOUND if the point is not on any connected display.
        
        @param pt
            The point to locate.
    */
    static int GetFromPoint(const wxPoint& pt);

    /**
        Returns the index of the display on which the given window lies.
        If the window is on more than one display it gets the display that overlaps the
        window the most.
        Returns @c wxNOT_FOUND if the window is not on any connected display.
        
        @param win
            The window to locate.
    */
    static int GetFromWindow(const wxWindow* win);

    /**
        Returns the bounding rectangle of the display whose index was passed to the
        constructor.
    */
    wxRect GetGeometry();

    /**
        Fills and returns an array with all the video modes that
        are supported by this display, or video modes that are
        supported by this display and match the mode parameter
        (if mode is not wxDefaultVideoMode).
    */
    wxArrayVideoModes GetModes(const wxVideoMode& mode = wxDefaultVideoMode);

    /**
        Returns the display's name.  A name is not available on all platforms.
    */
    wxString GetName();

    /**
        Returns @true if the display is the primary display.  The primary display is the
        one whose index is 0.
    */
    bool IsPrimary();
};