XmClipboardLock(3X)XmClipboardLock(3X)NAME
XmClipboardLock - A clipboard function that locks the clipboard
SYNOPSIS
#include <Xm/Xm.h> #include <Xm/CutPaste.h>
int XmClipboardLock (display, window)
Display * display;
Window window;
DESCRIPTION
XmClipboardLock locks the clipboard from access by another application until XmClipboardUnlock is called. All clipboard functions lock and
unlock the clipboard to prevent simultaneous access. This function allows the application to keep the clipboard data from changing between
calls to Inquire and other clipboard functions. The application does not need to lock the clipboard between calls to XmClipboardStartCopy
and XmClipboardEndCopy or to XmClipboardStartRetrieve and XmClipboardEndRetrieve.
If the clipboard is already locked by another application, XmClipboardLock returns an error status. Multiple calls to this function by the
same application increases the lock level. Specifies a pointer to the Display structure that was returned in a previous call to XOpenDis-
play or XtDisplay. Specifies a widget's window ID that relates the application window to the clipboard. The widget's window ID can be
obtained by using XtWindow. The same application instance should pass the same window ID to each of the clipboard functions that it calls.
RETURN VALUE
The function is successful. The function failed because the clipboard was locked by another application. The application can continue to
call the function again with the same parameters until the lock goes away. This gives the application the opportunity to ask if the user
wants to keep trying or to give up on the operation.
SEE ALSO XmClipboardEndCopy(3X), XmClipboardEndRetrieve(3X), XmClipboardStartCopy(3X), XmClipboardStartRetrieve(3X), XmClipboardUnlock(3X)XmClipboardLock(3X)
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XmClipboardRetrieve(library call) XmClipboardRetrieve(library call)
NAME
XmClipboardRetrieve -- A clipboard function that retrieves a data item from the clipboard
SYNOPSIS
#include <Xm/CutPaste.h>
int XmClipboardRetrieve (display, window, format_name,
buffer, length, num_bytes, private_id)
Display * display;
Window window;
char * format_name;
XtPointer buffer;
unsigned long length;
unsigned long * num_bytes;
long * private_id;
(void)
DESCRIPTION
XmClipboardRetrieve retrieves the current data item from clipboard storage. It returns a warning if the clipboard is locked, if there is no
data on the clipboard, or if the data needs to be truncated because the buffer length is too short.
Between a call to XmClipboardStartRetrieve and a call to XmClipboardEndRetrieve, multiple calls to XmClipboardRetrieve with the same format
name result in data being incrementally copied from the clipboard until the data in that format has all been copied.
The return value XmClipboardTruncate from calls to XmClipboardRetrieve indicates that more data remains to be copied in the given format.
It is recommended that any calls to the Inquire functions that the application needs to make to effect the copy from the clipboard be made
between the call to XmClipboardStartRetrieve and the first call to XmClipboardRetrieve. This way, the application does not need to call
XmClipboardLock and XmClipboardUnlock.
display Specifies a pointer to the Display structure that was returned in a previous call to XOpenDisplay or XtDisplay.
window Specifies the window ID of a widget that relates the application window to the clipboard. The widget's window ID can be obtained
through XtWindow. The same application instance should pass the same window ID to each of the clipboard functions that it calls.
format_name
Specifies the name of a format in which the data is stored on the clipboard.
buffer Specifies the buffer to which the application wants the clipboard to copy the data. The function allocates space to hold the
data returned into the buffer. The application is responsible for managing this allocated space. The application can recover
this allocated space by calling XtFree.
length Specifies the length of the application buffer.
num_bytes Specifies the number of bytes of data copied into the application buffer.
private_id
Specifies the private data stored with the data item by the application that placed the data item on the clipboard. If the appli-
cation did not store private data with the data item, this argument returns 0 (zero).
RETURN
XmClipboardSuccess
The function was successful.
XmClipboardLocked
The function failed because the clipboard was locked by another application. The application can continue to call the function
again with the same parameters until the lock goes away. This gives the application the opportunity to ask if the user wants to
keep trying or to give up on the operation.
XmClipboardTruncate
The data returned is truncated because the user did not provide a buffer large enough to hold the data.
XmClipboardNoData
The function could not find data on the clipboard corresponding to the format requested. This could occur because the clipboard
is empty; there is data on the clipboard but not in the requested format; or the data in the requested format was passed by name
and is no longer available.
RELATED XmClipboardEndRetrieve(3), XmClipboardLock(3), XmClipboardStartCopy(3), XmClipboardStartRetrieve(3), and XmClipboardUnlock(3).
XmClipboardRetrieve(library call)