## wxSystemOptions

wxSystemOptions stores option/value pairs that wxWidgets itself or applications can use to alter behaviour at run-time. It can be used to optimize behaviour that doesn't deserve a distinct API, but is still important to be able to configure.

These options are currently recognised by wxWidgets.

Windows

Option | Value
no-maskblt | 1 to never use WIN32's MaskBlt function, 0 to allow it to be used where possible. Default: 0. In some circumstances the MaskBlt function can be slower than using the fallback code, especially if using DC cacheing. By default, MaskBlt will be used where it is implemented by the operating system and driver.
msw.remap | If 1 (the default), wxToolBar bitmap colours will be remapped to the current theme's values. Set this to 0 to disable this functionality, for example if you're using more than 16 colours in your tool bitmaps.
msw.window.no-clip-children | If 1, windows will not automatically get the WS_CLIPCHILDREN style. This restores the way windows are refreshed back to the method used in versions of wxWidgets earlier than 2.5.4, and for some complex window hierarchies it can reduce apparent refresh delays. You may still specify wxCLIP_CHILDREN for individual windows.
msw.notebook.themed-background | If set to 0, globally disables themed backgrounds on notebook pages. Note that this won't disable the theme on the actual notebook background (noticeable only if there are no pages).
msw.staticbox.optimized-paint | If set to 0, switches off optimized wxStaticBox painting. Setting this to 0 causes more flicker, but allows applications to paint graphics on the parent of a static box (the optimized refresh causes any such drawing to disappear).
msw.display.directdraw | If set to 1, use DirectDraw-based implementation of wxDisplay. By default the standard Win32 functions are used.
msw.font.no-proof-quality | If set to 1, use default fonts quality instead of proof quality when creating fonts. With proof quality the fonts have slightly better appearance but not all fonts are available in this quality, e.g. the Terminal font in small sizes is not and this option may be used if wider fonts selection is more important than higher quality.

GTK+

Option | Value
gtk.window.force-background-colour | If 1, the backgrounds of windows with the wxBG_STYLE_COLOUR background style are cleared forcibly instead of relying on the underlying GTK+ window colour. This works around a display problem when running applications under KDE with the gtk-qt theme installed (0.6 and below).

Mac

Option | Value
mac.window-plain-transition | If 1, uses a plainer transition when showing a window. You can also use the symbol wxMAC_WINDOW_PLAIN_TRANSITION.
window-default-variant | The default variant used by windows (cast to integer from the wxWindowVariant enum). Also known as wxWINDOW_DEFAULT_VARIANT.
mac.listctrl.always_use_generic | Tells wxListCtrl to use the generic control even when it is capable of using the native control instead. Also knwon as wxMAC_ALWAYS_USE_GENERIC_LISTCTRL.

MGL

Option | Value
mgl.aa-threshold | Set this integer option to point size below which fonts are not antialiased. Default: 10.
mgl.screen-refresh | Screen refresh rate in Hz. A reasonable default is used if not specified.

Motif

Option | Value
motif.largebuttons | If 1, uses a bigger default size for wxButtons.

The compile-time option to include or exclude this functionality is wxUSE_SYSTEM_OPTIONS.

Derived from

wxObject

Include files

<wx/sysopt.h>

Members

wxSystemOptions::wxSystemOptions
wxSystemOptions::GetOption
wxSystemOptions::GetOptionInt
wxSystemOptions::HasOption
wxSystemOptions::IsFalse
wxSystemOptions::SetOption

### wxSystemOptions::wxSystemOptions

wxSystemOptions()

Default constructor. You don't need to create an instance of wxSystemOptions since all of its functions are static.

### wxSystemOptions::GetOption

wxString GetOption(const wxString& name) const

Gets an option. The function is case-insensitive to name.

Returns empty string if the option hasn't been set.

See also

wxSystemOptions::SetOption, wxSystemOptions::GetOptionInt, wxSystemOptions::HasOption

### wxSystemOptions::GetOptionInt

int GetOptionInt(const wxString& name) const

Gets an option as an integer. The function is case-insensitive to name.

If the option hasn't been set, this function returns 0.

See also

wxSystemOptions::SetOption, wxSystemOptions::GetOption, wxSystemOptions::HasOption

### wxSystemOptions::HasOption

bool HasOption(const wxString& name) const

Returns `true` if the given option is present. The function is case-insensitive to name.

See also

wxSystemOptions::SetOption, wxSystemOptions::GetOption, wxSystemOptions::GetOptionInt

### wxSystemOptions::IsFalse

bool IsFalse(const wxString& name) const

Returns `true` if the option with the given name had been set to 0 value. This is mostly useful for boolean options for which you can't use `GetOptionInt(name) == 0` as this would also be true if the option hadn't been set at all.

### wxSystemOptions::SetOption

void SetOption(const wxString& name, const wxString& value)

void SetOption(const wxString& name, int value)

Sets an option. The function is case-insensitive to name.

See also

wxSystemOptions::GetOption, wxSystemOptions::GetOptionInt, wxSystemOptions::HasOption