Tue, 01/27/2009 - 15:43#1

vtorshyn

Re: Drag and Drop Btn1 in C++ and motif

Hi vegettovk,
It is possible to override Drag and Drop behavior by replacing default translations.
XmTextField widget has Button1 binding to start drag, and action called 'process-bdrag', you might want replace it by translations (see TextF.c code):
...
static char myTranslation[] = ": process-bdrag()";
...
Then register such translation by a XtOverrideTranslations().
But, in this case such actions like Enter() might work not correctly (because default button which do enter/focusIn action is replaced). So if you want select the widget you should use middle button.

In case when required more flexibility you should write your own action.
...
static char myTranslation[] = ": myDragAction()";
static XtActionsRec myActions[] = {
{"myDragAction", myStartDrag }
};
static void myStartDrag(Widget w,XEvent * event, String * params, Cardinal * num_params)
{
/*Here you should write your own code for drag operation*/
...
/*Finaly, call XmTextField drag */
ProcessBDrag(w, event, params, num_params);
}
...

Also some useful examples you can find in Motif Programming Manual, volume Six A.