QtLELEdit.qo.h

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00001 //# QtLEL.qo.h: Helper class for viewer data manager widget (QtDataManager).
00002 //# Copyright (C) 2005
00003 //# Associated Universities, Inc. Washington DC, USA.
00004 //#
00005 //# This library is free software; you can redistribute it and/or modify it
00006 //# under the terms of the GNU Library General Public License as published by
00007 //# the Free Software Foundation; either version 2 of the License, or (at your
00008 //# option) any later version.
00009 //#
00010 //# This library is distributed in the hope that it will be useful, but WITHOUT
00011 //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00012 //# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00013 //# License for more details.
00014 //#
00015 //# You should have received a copy of the GNU Library General Public License
00016 //# along with this library; if not, write to the Free Software Foundation,
00017 //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
00018 //#
00019 //# Correspondence concerning AIPS++ should be addressed as follows:
00020 //#        Internet email: aips2-request@nrao.edu.
00021 //#        Postal address: AIPS++ Project Office
00022 //#                        National Radio Astronomy Observatory
00023 //#                        520 Edgemont Road
00024 //#                        Charlottesville, VA 22903-2475 USA
00025 //#
00026 //# $Id$
00027 
00028 #ifndef QTLELEDIT_H
00029 #define QTLELEDIT_H
00030 
00031 #include <casa/aips.h>
00032 
00033 #include <graphics/X11/X_enter.h>
00034 #  include <QLineEdit>
00035 #  include <QColor>
00036 #include <graphics/X11/X_exit.h>
00037 
00038 
00039 namespace casa { //# NAMESPACE CASA - BEGIN
00040 
00041 
00042         class QtLELEdit : public QLineEdit {
00043                 //# Used within QtDataManager's designer-created gui (QtDataManager.ui[.h]).
00044                 //# A QLineEdit which also signals whenever it gets focus.
00045 
00046                 Q_OBJECT
00047 
00048 
00049         public:
00050 
00051                 QtLELEdit(QWidget* parent=0) : QLineEdit(parent) {
00052 
00053                         inactivePalette_ = activePalette_ = palette();
00054 
00055                         //# The inactive pallette shows text in the 'disabled' color, even
00056                         //# if the edit widget is not really disabled.  This is to provide
00057                         //# feedback that the LEL expression is / is not being used.
00058 
00059                         QColor dsbldText = palette().color(QPalette::Disabled, QPalette::Text);
00060                         inactivePalette_.setColor(QPalette::Active, QPalette::Text, dsbldText);
00061                         inactivePalette_.setColor(QPalette::Inactive, QPalette::Text, dsbldText);
00062 
00063                         deactivate();
00064                 }
00065 
00066 
00067                 Bool isActive() {
00068                         return active_;
00069                 }
00070 
00071 
00072         signals:
00073 
00074                 void gotFocus(QFocusEvent* ev);
00075 
00076 
00077         public slots:
00078 
00079                 virtual void  activate() {
00080                         setPalette(activePalette_);
00081                         active_ = True;
00082                 }
00083 
00084                 virtual void deactivate() {
00085                         setPalette(inactivePalette_);
00086                         active_ = False;
00087                 }
00088 
00089 
00090 
00091         protected slots:
00092 
00093                 virtual void focusInEvent(QFocusEvent* ev) {
00094                         QLineEdit::focusInEvent(ev);
00095                         activate();
00096                         emit gotFocus(ev);
00097                 }
00098 
00099 
00100         protected:
00101 
00102                 QPalette activePalette_;
00103                 QPalette inactivePalette_;
00104                 Bool active_;
00105 
00106         };
00107 
00108 
00109 
00110 } //# NAMESPACE CASA - END
00111 
00112 #endif
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