kexi

kexidbcheckbox.cpp

00001 /* This file is part of the KDE project
00002    Copyright (C) 2005 Cedric Pasteur <cedric.pasteur@free.fr>
00003    Copyright (C) 2004-2006 Jaroslaw Staniek <js@iidea.pl>
00004 
00005    This program is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Library General Public
00007    License as published by the Free Software Foundation; either
00008    version 2 of the License, or (at your option) any later version.
00009 
00010    This program is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Library General Public License for more details.
00014 
00015    You should have received a copy of the GNU Library General Public License
00016    along with this program; see the file COPYING.  If not, write to
00017    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00018  * Boston, MA 02110-1301, USA.
00019 */
00020 
00021 #include "kexidbcheckbox.h"
00022 
00023 #include <kexiutils/utils.h>
00024 #include <kexidb/queryschema.h>
00025 
00026 KexiDBCheckBox::KexiDBCheckBox(const QString &text, QWidget *parent, const char *name)
00027  : QCheckBox(text, parent, name), KexiFormDataItemInterface()
00028  , m_invalidState(false)
00029  , m_tristateChanged(false)
00030  , m_tristate(TristateDefault)
00031 {
00032     setFocusPolicy(QWidget::StrongFocus);
00033     updateTristate();
00034     connect(this, SIGNAL(stateChanged(int)), this, SLOT(slotStateChanged(int)));
00035 }
00036 
00037 KexiDBCheckBox::~KexiDBCheckBox()
00038 {
00039 }
00040 
00041 void KexiDBCheckBox::setInvalidState( const QString& displayText )
00042 {
00043     setEnabled(false);
00044     setState(NoChange);
00045     m_invalidState = true;
00047     if (focusPolicy() & TabFocus)
00048         setFocusPolicy(QWidget::ClickFocus);
00049     setText(displayText);
00050 }
00051 
00052 void
00053 KexiDBCheckBox::setEnabled(bool enabled)
00054 {
00055     if(enabled && m_invalidState)
00056         return;
00057     QCheckBox::setEnabled(enabled);
00058 }
00059 
00060 void
00061 KexiDBCheckBox::setReadOnly(bool readOnly)
00062 {
00063     setEnabled(!readOnly);
00064 }
00065 
00066 void KexiDBCheckBox::setValueInternal(const QVariant &add, bool removeOld)
00067 {
00068     Q_UNUSED(add);
00069     Q_UNUSED(removeOld);
00070     if (isTristateInternal())
00071         setState( m_origValue.isNull() ? NoChange : (m_origValue.toBool() ? On : Off) );
00072     else
00073         setState( m_origValue.toBool() ? On : Off );
00074 }
00075 
00076 QVariant
00077 KexiDBCheckBox::value()
00078 {
00079     if (state()==NoChange)
00080         return QVariant();
00081     return QVariant(state()==On, 1);
00082 }
00083 
00084 void KexiDBCheckBox::slotStateChanged(int )
00085 {
00086     signalValueChanged();
00087 }
00088 
00089 bool KexiDBCheckBox::valueIsNull()
00090 {
00091     return state() == NoChange;
00092 }
00093 
00094 bool KexiDBCheckBox::valueIsEmpty()
00095 {
00096     return false;
00097 }
00098 
00099 bool KexiDBCheckBox::isReadOnly() const
00100 {
00101     return !isEnabled();
00102 }
00103 
00104 QWidget*
00105 KexiDBCheckBox::widget()
00106 {
00107     return this;
00108 }
00109 
00110 bool KexiDBCheckBox::cursorAtStart()
00111 {
00112     return false; 
00113 }
00114 
00115 bool KexiDBCheckBox::cursorAtEnd()
00116 {
00117     return false; 
00118 }
00119 
00120 void KexiDBCheckBox::clear()
00121 {
00122     setState(NoChange);
00123 }
00124 
00125 void KexiDBCheckBox::setTristate(KexiDBCheckBox::Tristate tristate)
00126 {
00127     m_tristateChanged = true;
00128     m_tristate = tristate;
00129     updateTristate();
00130 }
00131 
00132 KexiDBCheckBox::Tristate KexiDBCheckBox::isTristate() const
00133 {
00134     return m_tristate;
00135 }
00136 
00137 bool KexiDBCheckBox::isTristateInternal() const
00138 {
00139     if (m_tristate == TristateDefault)
00140         return !dataSource().isEmpty();
00141 
00142     return m_tristate == TristateOn;
00143 }
00144 
00145 void KexiDBCheckBox::updateTristate()
00146 {
00147     if (m_tristate == TristateDefault) {
00149         QCheckBox::setTristate( !dataSource().isEmpty() );
00150     }
00151     else {
00152         QCheckBox::setTristate( m_tristate == TristateOn );
00153     }
00154 }
00155 
00156 void KexiDBCheckBox::setDataSource(const QString &ds)
00157 {
00158     KexiFormDataItemInterface::setDataSource(ds);
00159     updateTristate();
00160 }
00161 
00162 void KexiDBCheckBox::setDisplayDefaultValue(QWidget *widget, bool displayDefaultValue)
00163 {
00164     KexiFormDataItemInterface::setDisplayDefaultValue(widget, displayDefaultValue);
00165     // initialize display parameters for default / entered value
00166     KexiDisplayUtils::DisplayParameters * const params 
00167         = displayDefaultValue ? m_displayParametersForDefaultValue : m_displayParametersForEnteredValue;
00168 //  setFont(params->font);
00169     QPalette pal(palette());
00170 //  pal.setColor(QPalette::Active, QColorGroup::Text, params->textColor);
00171     pal.setColor(QPalette::Active, QColorGroup::Foreground, params->textColor);
00172     setPalette(pal);
00173 }
00174 
00175 #include "kexidbcheckbox.moc"
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