DwtStartCopyToClipboard(3Dwt) DwtStartCopyToClipboard(3Dwt)
Name
DwtStartCopyToClipboard - Sets up storage and data structures to receive clipboard data.
Syntax
int DwtStartCopyToClipboard(display, window, clip_label,
time, widget, callback, item_id)
Display *display;
Window window;
DwtCompString clip_label;
Time time;
Widget widget;
VoidProc callback;
long *item_id;
Arguments
display Specifies a pointer to the Display structure that was returned in a previous call to XOpenDisplay. For information on XOpenDis-
play and the Display structure, see the Guide to the Xlib Library: C Language Binding.
window Specifies the window ID that relates the application window to the clipboard. The same application instance should pass the same
window ID to each clipboard function that it calls.
clip_label
Specifies the label to be associated with the data item. This argument is used to identify the data item, for example, in a
clipboard viewer. An example of a label is the name of the application that places the data in the clipboard.
time Specifies the timestamping of the event that triggered the copy.
widget Specifies the ID of the widget that will receive messages requesting data previously passed by name. This argument must be
present in order to pass data by name. Any valid widget ID in your application can be used. All message handling is done by the
cut and paste functions.
callback Specifies the address of the callback function that is called when the clipboard needs data that was originally passed by name.
This is also the callback to receive the DELETE message for items that were originally passed by name. This argument must be
present in order to pass data by name.
item_id Specifies the number assigned to this data item. The application uses this number in calls to DwtCopyToClipboard, DwtEndCopyTo-
Clipboard, and DwtCancelCopyToClipboard.
Description
The DwtStartCopyToClipboard function sets up storage and data structures to receive clipboard data. An application calls DwtStartCopyTo-
Clipboard during a cut or copy operation. The data item that these structures receive through calls to DwtCopyToClipboard then becomes the
next item to be pasted (the next-paste item) in the clipboard after the call to DwtEndCopyToClipboard.
DwtStartCopyToClipboard is like DwtBeginCopyToClipboard except that it has the time argument to support the ICCCM clipboard selection mech-
anism. To perform cut and paste operations between your application and an application using the ICCCM clipboard selection mechanism, you
must use DwtStartCopyToClipboard and provide a timestamping value for time, not a CurrentTime value. Use of the value CurrentTime for time
may cause the ICCCM interface to fail.
The window and callback arguments must be present in order to pass data by name.
The callback format is as follows:
function name(widget, data_id, private_id, reason)
Widget *widget;
int *data_id;
int *private_id;
int *reason;
widget Specifies the ID of the widget passed to DwtStartCopyToClipboard.
data_id Specifies the identifying number returned by DwtCopyToClipboard, which identifies the pass-by-name data.
private_id
Specifies the private information passed to DwtCopyToClipboard.
reason Specifies the reason, which is either DwtCRClipboardDataDelete or DwtCRClipboardDataRequest.
Return Values
This function returns one of these status return constants:
ClipboardSuccess The function is success-
ful.
ClipboardLocked The function failed
because the clipboard was
locked by another appli-
cation. The application
can continue to call the
function with the same
parameters until the
clipboard is unlocked.
Optionally, the applica-
tion can ask if the user
wants to keep trying or
to give up on the opera-
tion.
See Also
DwtCopyToClipboard(3Dwt), DwtEndCopyToClipboard(3Dwt), DwtCancelCopyToClipboard(3Dwt), DwtBeginCopyToClipboard(3Dwt)
Guide to the XUI Toolkit: C Language Binding
Guide to the XUI Toolkit Intrinsics: C Language Binding
DwtStartCopyToClipboard(3Dwt)