lyx_mirror/src/frontends/xforms/FeedbackController.C
Angus Leeming a97c4f51c3 xforms clean-up, described in detail in my mail of 31 May. See
http://www.mail-archive.com/lyx-devel@lists.lyx.org/msg38939.html


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@4393 a592a061-630c-0410-9148-cb99ea01b6c8
2002-06-13 13:43:51 +00:00

131 lines
2.7 KiB
C

/**
* \file FeedbackController.C
* Copyright 2002 the LyX Team
* Read the file COPYING
*
* \author Angus Leeming, a.leeming@ic.ac.uk
*/
/* A common interface for posting feedback messages to a message widget in
* xforms.
* Derive FormBase and FormBaseDeprecated from it, so daughter classes of
* either can use the same interface.
*/
#include <config.h>
#ifdef __GNUG__
#pragma implementation
#endif
#include "FeedbackController.h"
#include "gettext.h" // _()
#include "xforms_helpers.h" // formatted
#include "support/LAssert.h"
#include FORMS_H_LOCATION
FeedbackController::FeedbackController()
: warning_posted_(false), message_widget_(0)
{}
FeedbackController::~FeedbackController()
{}
void FeedbackController::setMessageWidget(FL_OBJECT * ob)
{
lyx::Assert(ob && ob->objclass == FL_TEXT);
message_widget_ = ob;
fl_set_object_lsize(message_widget_, FL_SMALL_SIZE);
}
// preemptive handler for feedback messages
void FeedbackController::MessageCB(FL_OBJECT * ob, int event)
{
lyx::Assert(ob);
switch (event) {
case FL_ENTER:
{
string const feedback = getFeedback(ob);
if (feedback.empty() && warning_posted_)
break;
warning_posted_ = false;
postMessage(getFeedback(ob));
break;
}
case FL_LEAVE:
if (!warning_posted_)
clearMessage();
break;
default:
break;
}
}
void FeedbackController::PrehandlerCB(FL_OBJECT * ob, int event, int key)
{
if (event == FL_PUSH && key == 2 && ob->objclass == FL_INPUT) {
// Trigger an input event when pasting in an xforms input object
// using the middle mouse button.
InputCB(ob, 0);
} else if (message_widget_ &&
(event == FL_ENTER || event == FL_LEAVE)) {
// Post feedback as the mouse enters the object,
// remove it as the mouse leaves.
MessageCB(ob, event);
}
}
void FeedbackController::postWarning(string const & warning)
{
warning_posted_ = true;
postMessage(warning);
}
void FeedbackController::clearMessage()
{
lyx::Assert(message_widget_);
warning_posted_ = false;
string const existing = message_widget_->label
? message_widget_->label : string();
if (existing.empty())
return;
// This trick is needed to get xforms to clear the label...
fl_set_object_label(message_widget_, "");
fl_hide_object(message_widget_);
}
void FeedbackController::postMessage(string const & message)
{
lyx::Assert(message_widget_);
string str;
if (warning_posted_)
str = _("WARNING! ") + message;
else
str = message;
str = formatted(str, message_widget_->w-10, FL_SMALL_SIZE);
fl_set_object_label(message_widget_, str.c_str());
FL_COLOR const label_color = warning_posted_ ? FL_TOMATO : FL_BLACK;
fl_set_object_lcol(message_widget_, label_color);
if (!message_widget_->visible)
fl_show_object(message_widget_);
}