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These functions do not implement a GUI element but are useful when developing
programs that do. The functions uiwait, uiresume, and
waitfor are only available with the qt or fltk toolkits.
Return true if the desktop (GUI) is currently in use.
See also: isguirunning.
Query or set user-custom GUI data.
The GUI data is stored in the figure handle h. If h is not a figure handle then it’s parent figure will be used for storage.
data must be a single object which means it is usually preferable for it to be a data container such as a cell array or struct so that additional data items can be added easily.
See also: getappdata, setappdata, get, set, getpref, setpref.
Return a structure of object handles for the figure associated with handle h.
If no handle is specified the current figure returned by gcf is used.
The fieldname for each entry of hdata is taken from the "tag"
property of the graphic object. If the tag is empty then the handle is not
returned. If there are multiple graphic objects with the same tag then
the entry in hdata will be a vector of handles. guihandles
includes all possible handles, including those for
which "HandleVisibility" is "off".
Return true if a window system is available (X11, Windows, or Apple OS X) and false otherwise.
See also: isguirunning.
Return true if Octave is running in GUI mode and false otherwise.
See also: have_window_system.
Suspend program execution until the figure with handle h is deleted
or uiresume is called.
When no figure handle is specified this function uses the current figure. If the figure handle is invalid or there is no current figure, this functions returns immediately.
When specified, timeout defines the number of seconds to wait
for the figure deletion or the uiresume call. The timeout value
must be at least 1. If a smaller value is specified, a warning is issued
and a timeout value of 1 is used instead. If a non-integer value is
specified, it is truncated towards 0. If timeout is not specified,
the program execution is suspended indefinitely.
Resume program execution suspended with uiwait.
The handle h must be the same as the on specified in uiwait.
If the handle is invalid or there is no uiwait call pending for the
figure with handle h, this function does nothing.
See also: uiwait.
Suspend the execution of the current program until a condition is satisfied on the graphics handle h.
While the program is suspended graphics events are still processed normally,
allowing callbacks to modify the state of graphics objects. This function
is reentrant and can be called from a callback, while another waitfor
call is pending at the top-level.
In the first form, program execution is suspended until the graphics object h is destroyed. If the graphics handle is invalid, the function returns immediately.
In the second form, execution is suspended until the graphics object is destroyed or the property named prop is modified. If the graphics handle is invalid or the property does not exist, the function returns immediately.
In the third form, execution is suspended until the graphics object is
destroyed or the property named prop is set to value. The
function isequal is used to compare property values. If the graphics
handle is invalid, the property does not exist or the property is already
set to value, the function returns immediately.
An optional timeout can be specified using the property timeout.
This timeout value is the number of seconds to wait for the condition to be
true. timeout must be at least 1. If a smaller value is specified, a
warning is issued and a value of 1 is used instead. If the timeout value is
not an integer, it is truncated towards 0.
To define a condition on a property named timeout, use the string
\timeout instead.
In all cases, typing CTRL-C stops program execution immediately.
See also: waitforbuttonpress, isequal.
Next: User-Defined Preferences, Previous: UI Elements, Up: GUI Development [Contents][Index]