Bug #50: Minibuffer completion drop down and mouse selection

[Angus Leeming]

"You have to double click to select an item from the drop down with the 
mouse."

Well that didn't work! I tried to attach a little patch to this bug report, 
but kept getting the message "file empty", which it wasn't. So, I gave up and 
simply appended it to my "Additional Comments". That too turned out to be an 
error because all the '\n's are swallowed up!

So, apologies for screwing up the bug report on bugzilla!

Here is what I meant to say:
John, 

I don't see the difficulty here. Why can't you register a callback function 
to a single click event as we usually do? See the test code below that does 
just that. I must be missing something obvious, but your very clever code in 
DropDown.C seems to be re-inventing xforms' wheels?

Angus

Index: src/frontends/xforms/DropDown.C
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/frontends/xforms/DropDown.C,v
retrieving revision 1.3
diff -u -p -r1.3 DropDown.C
--- src/frontends/xforms/DropDown.C     2001/12/20 15:11:51     1.3
+++ src/frontends/xforms/DropDown.C     2002/01/08 10:43:38
@@ -9,6 +9,7 @@
 #include <config.h>

 #include "DropDown.h"
+#include "xforms_helpers.h"

 #include <iostream>

@@ -25,6 +26,19 @@ extern "C" int C_DropDownPeekEventCB(FL_
        return d->peek(static_cast<XEvent*>(xev));
 }

+
+// a test function: simply prints the contents of the selected browser line
+// to screen.
+extern "C" void C_SingleClickCB(FL_OBJECT * ob, long)
+{
+       if (!ob || ob->objclass != FL_BROWSER)
+               return;
+
+       int const sel = fl_get_browser(ob);
+       string const line = getStringFromBrowser(ob, sel);
+       std::cerr << "C_SingleClickCB: " << line << std::endl;
+}
+

 DropDown::DropDown(LyXView * lv, FL_OBJECT * ob)
        : lv_(lv)
@@ -33,6 +47,7 @@ DropDown::DropDown(LyXView * lv, FL_OBJE
        fl_add_box(FL_UP_BOX, 0, 0, ob->w, 100, "");
        browser_ = fl_add_browser(FL_SELECT_BROWSER, 0, 0, ob->w, 100, "");
        form_->u_vdata = this;
+       fl_set_object_callback(browser_, C_SingleClickCB, 0);
        fl_set_browser_dblclick_callback(browser_, C_DropDownCompletedCB, 0);
        fl_register_raw_callback(form_, KeyPressMask|ButtonPressMask, 
C_DropDownPeekEventCB);
        fl_end_form();