interface/wx/sysopt.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        sysopt.h
   3 // Purpose:     interface of wxSystemOptions
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxSystemOptions
  11
  12     wxSystemOptions stores option/value pairs that wxWidgets itself or
  13     applications can use to alter behaviour at run-time. It can be
  14     used to optimize behaviour that doesn't deserve a distinct API,
  15     but is still important to be able to configure.
  16
  17     These options are currently recognised by wxWidgets:
  18
  19
  20     @section sysopt_win Windows
  21
  22     @beginFlagTable
  23     @flag{no-maskblt}
  24         1 to never use WIN32's MaskBlt function, 0 to allow it to be used where possible.
  25         Default: 0. In some circumstances the MaskBlt function can be slower than using
  26         the fallback code, especially if using DC cacheing. By default, MaskBlt will be
  27         used where it is implemented by the operating system and driver.
  28     @flag{msw.remap}
  29         If 1 (the default), wxToolBar bitmap colours will be remapped to the current
  30         theme's values. Set this to 0 to disable this functionality, for example if
  31         you're using more than 16 colours in your tool bitmaps.
  32     @flag{msw.window.no-clip-children}
  33         If 1, windows will not automatically get the WS_CLIPCHILDREN style.
  34         This restores the way windows are refreshed back to the method used in
  35         versions of wxWidgets earlier than 2.5.4, and for some complex window
  36         hierarchies it can reduce apparent refresh delays.
  37         You may still specify wxCLIP_CHILDREN for individual windows.
  38     @flag{msw.notebook.themed-background}
  39         If set to 0, globally disables themed backgrounds on notebook pages.
  40         Note that this won't disable the theme on the actual notebook background
  41         (noticeable only if there are no pages).
  42     @flag{msw.staticbox.optimized-paint}
  43         If set to 0, switches off optimized wxStaticBox painting.
  44         Setting this to 0 causes more flicker, but allows applications to paint
  45         graphics on the parent of a static box (the optimized refresh causes any
  46         such drawing to disappear).
  47     @flag{msw.display.directdraw}
  48         If set to 1, use DirectDraw-based implementation of wxDisplay.
  49         By default the standard Win32 functions are used.
  50     @flag{msw.font.no-proof-quality}
  51         If set to 1, use default fonts quality instead of proof quality when
  52         creating fonts. With proof quality the fonts have slightly better
  53         appearance but not all fonts are available in this quality,
  54         e.g. the Terminal font in small sizes is not and this option may be
  55         used if wider fonts selection is more important than higher quality.
  56     @flag{wince.dialog.real-ok-cancel}
  57         The PocketPC guidelines recommend for Ok/Cancel dialogs to use an OK button
  58         located inside the caption bar and implement Cancel functionality through
  59         Undo outside the dialog.
  60         wxDialog::CreateButtonSizer will follow the native behaviour on WinCE but
  61         it can be overridden with real wxButtons by setting the option below to 1.
  62     @endFlagTable
  63
  64
  65     @section sysopt_gtk GTK+
  66
  67     @beginFlagTable
  68     @flag{gtk.tlw.can-set-transparent}
  69         wxTopLevelWindow::CanSetTransparent() method normally tries to detect
  70         automatically whether transparency for top level windows is currently
  71         supported, however this may sometimes fail and this option allows to
  72         override the automatic detection. Setting it to 1 makes the transparency
  73         be always available (setting it can still fail, of course) and setting it
  74         to 0 makes it always unavailable.
  75     @flag{gtk.desktop}
  76         This option can be set to override the default desktop environment
  77         determination. Supported values are GNOME and KDE.
  78     @flag{gtk.window.force-background-colour}
  79         If 1, the backgrounds of windows with the wxBG_STYLE_COLOUR background
  80         style are cleared forcibly instead of relying on the underlying GTK+
  81         window colour. This works around a display problem when running
  82         applications under KDE with the gtk-qt theme installed (0.6 and below).
  83     @endFlagTable
  84
  85
  86     @section sysopt_mac Mac
  87
  88     @beginFlagTable
  89     @flag{mac.window-plain-transition}
  90         If 1, uses a plainer transition when showing a window.
  91         You can also use the symbol wxMAC_WINDOW_PLAIN_TRANSITION.
  92     @flag{window-default-variant}
  93         The default variant used by windows (cast to integer from the wxWindowVariant enum).
  94         Also known as wxWINDOW_DEFAULT_VARIANT.
  95     flag{mac.listctrl.always_use_generic}
  96         Tells wxListCtrl to use the generic control even when it is capable of
  97         using the native control instead. Also knwon as wxMAC_ALWAYS_USE_GENERIC_LISTCTRL.
  98     flag{mac.textcontrol-use-spell-checker}
  99         This option only has effect for Mac OS X 10.4 and higher.
 100         If 1 activates the spell checking in wxTextCtrl.
 101     @endFlagTable
 102
 103
 104     @section sysopt_mgl MGL
 105
 106     @beginFlagTable
 107     @flag{mgl.aa-threshold}
 108         Set this integer option to point size below which fonts are not antialiased. Default: 10.
 109     @flag{mgl.screen-refresh}
 110         Screen refresh rate in Hz. A reasonable default is used if not specified.
 111     @endFlagTable
 112
 113
 114     @section sysopt_motif Motif
 115
 116     @beginFlagTable
 117     @flag{motif.largebuttons}
 118         If 1, uses a bigger default size for wxButtons.
 119     @endFlagTable
 120
 121
 122     The compile-time option to include or exclude this functionality is wxUSE_SYSTEM_OPTIONS.
 123
 124     @library{wxbase}
 125     @category{cfg}
 126
 127     @see wxSystemSettings
 128 */
 129 class wxSystemOptions : public wxObject
 130 {
 131 public:
 132     /**
 133         Default constructor.
 134
 135         You don't need to create an instance of wxSystemOptions since all
 136         of its functions are static.
 137     */
 138     wxSystemOptions();
 139
 140     /**
 141         Gets an option. The function is case-insensitive to @a name.
 142         Returns empty string if the option hasn't been set.
 143
 144         @see SetOption(), GetOptionInt(), HasOption()
 145     */
 146     static wxString GetOption(const wxString& name);
 147
 148     /**
 149         Gets an option as an integer. The function is case-insensitive to @a name.
 150         If the option hasn't been set, this function returns 0.
 151
 152         @see SetOption(), GetOption(), HasOption()
 153     */
 154     static int GetOptionInt(const wxString& name);
 155
 156     /**
 157         Returns @true if the given option is present.
 158         The function is case-insensitive to @a name.
 159
 160         @see SetOption(), GetOption(), GetOptionInt()
 161     */
 162     static bool HasOption(const wxString& name);
 163
 164     /**
 165         Returns @true if the option with the given @a name had been set to 0 value.
 166
 167         This is mostly useful for boolean options for which you can't use
 168         @c GetOptionInt(name) == 0 as this would also be @true if the option
 169         hadn't been set at all.
 170     */
 171     static bool IsFalse(const wxString& name);
 172
 173     //@{
 174     /**
 175         Sets an option. The function is case-insensitive to @a name.
 176     */
 177     void SetOption(const wxString& name, const wxString& value);
 178     void SetOption(const wxString& name, int value);
 179     //@}
 180 };
 181