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a97c4f51c3
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
131 lines
2.7 KiB
C
131 lines
2.7 KiB
C
/**
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* \file FeedbackController.C
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* Copyright 2002 the LyX Team
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* Read the file COPYING
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*
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* \author Angus Leeming, a.leeming@ic.ac.uk
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*/
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/* A common interface for posting feedback messages to a message widget in
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* xforms.
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* Derive FormBase and FormBaseDeprecated from it, so daughter classes of
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* either can use the same interface.
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*/
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#include <config.h>
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#ifdef __GNUG__
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#pragma implementation
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#endif
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#include "FeedbackController.h"
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#include "gettext.h" // _()
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#include "xforms_helpers.h" // formatted
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#include "support/LAssert.h"
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#include FORMS_H_LOCATION
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FeedbackController::FeedbackController()
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: warning_posted_(false), message_widget_(0)
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{}
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FeedbackController::~FeedbackController()
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{}
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void FeedbackController::setMessageWidget(FL_OBJECT * ob)
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{
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lyx::Assert(ob && ob->objclass == FL_TEXT);
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message_widget_ = ob;
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fl_set_object_lsize(message_widget_, FL_SMALL_SIZE);
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}
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// preemptive handler for feedback messages
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void FeedbackController::MessageCB(FL_OBJECT * ob, int event)
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{
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lyx::Assert(ob);
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switch (event) {
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case FL_ENTER:
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{
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string const feedback = getFeedback(ob);
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if (feedback.empty() && warning_posted_)
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break;
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warning_posted_ = false;
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postMessage(getFeedback(ob));
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break;
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}
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case FL_LEAVE:
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if (!warning_posted_)
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clearMessage();
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break;
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default:
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break;
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}
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}
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void FeedbackController::PrehandlerCB(FL_OBJECT * ob, int event, int key)
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{
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if (event == FL_PUSH && key == 2 && ob->objclass == FL_INPUT) {
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// Trigger an input event when pasting in an xforms input object
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// using the middle mouse button.
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InputCB(ob, 0);
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} else if (message_widget_ &&
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(event == FL_ENTER || event == FL_LEAVE)) {
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// Post feedback as the mouse enters the object,
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// remove it as the mouse leaves.
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MessageCB(ob, event);
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}
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}
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void FeedbackController::postWarning(string const & warning)
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{
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warning_posted_ = true;
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postMessage(warning);
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}
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void FeedbackController::clearMessage()
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{
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lyx::Assert(message_widget_);
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warning_posted_ = false;
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string const existing = message_widget_->label
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? message_widget_->label : string();
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if (existing.empty())
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return;
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// This trick is needed to get xforms to clear the label...
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fl_set_object_label(message_widget_, "");
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fl_hide_object(message_widget_);
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}
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void FeedbackController::postMessage(string const & message)
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{
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lyx::Assert(message_widget_);
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string str;
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if (warning_posted_)
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str = _("WARNING! ") + message;
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else
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str = message;
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str = formatted(str, message_widget_->w-10, FL_SMALL_SIZE);
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fl_set_object_label(message_widget_, str.c_str());
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FL_COLOR const label_color = warning_posted_ ? FL_TOMATO : FL_BLACK;
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fl_set_object_lcol(message_widget_, label_color);
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if (!message_widget_->visible)
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fl_show_object(message_widget_);
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}
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