/*
Start updating.
Implementation of VariableNameManager's virtual funtion to establish a connection to a PV as the variable name has changed.
This function may also be used to initiate updates when loaded as a plugin.
*/
void QEGenericButton::establishConnection( unsigned int variableIndex ) {
// Create a connection.
// If successfull, the QCaObject object that will supply data update signals will be returned
qcaobject::QCaObject* qca = createConnection( variableIndex );
// If a QCaObject object is now available to supply data update signals, connect it to the appropriate slots
if( qca ) {
// Get updates if subscribing and if this is the alternate read back, or if this is the primary readback and there is no alternate read back.
if( subscribe &&
(
( variableIndex == 1 /*1=Alternate readback variable*/ ) ||
( variableIndex == 0 /*0=Primary readback variable*/ && getSubstitutedVariableName(1/*1=Alternate readback variable*/ ).isEmpty() )
)
)
{
if( updateOption == UPDATE_TEXT || updateOption == UPDATE_TEXT_AND_ICON)
{
setButtonText( "" );
}
connectButtonDataChange( qca );
}
// Get conection status changes always (subscribing or not)
QObject::connect( qca, SIGNAL( stringConnectionChanged( QCaConnectionInfo&, const unsigned int& ) ),
getButtonQObject(), SLOT( connectionChanged( QCaConnectionInfo&, const unsigned int&) ) );
}
}
/*
Implementation of QEWidget's virtual funtion to create the specific type of QCaObject required.
For a push button a QCaObject that streams strings is required.
*/
qcaobject::QCaObject* QEPeriodic::createQcaItem( unsigned int variableIndex ) {
// Reflect the initial disconnected state if there is a write PVs.
// If there are no write PVs, leave it enabled it as this widget can be used to signal
// an element selection as well as write element related values.
if( writeButton && ( variableIndex == WRITE_VARIABLE_1 || variableIndex == WRITE_VARIABLE_2 ))
{
writeButton->setEnabled( false );
}
// Create the items as a QEFloating
return new QEFloating( getSubstitutedVariableName( variableIndex ), this, &floatingFormatting, variableIndex );
}
/*
Act on a connection change.
Change how the label looks and change the tool tip
This is the slot used to recieve connection updates from a QCaObject based class.
*/
void QEGenericButton::connectionChanged( QCaConnectionInfo& connectionInfo, const unsigned int& variableIndex )
{
// Do nothing if no variable name, but there is a program to run or a new gui to open.
// Most widgets will be dissabled at this point if there is no good connection to a PV,
// but this widget may be doing other stuff (running a program of starting a GUI)
if( getSubstitutedVariableName( variableIndex ).isEmpty() )
return;
// Note the connected state
isConnected = connectionInfo.isChannelConnected();
// Display the connected state
updateToolTipConnection( isConnected, variableIndex );
updateConnectionStyle( isConnected );
}
//==============================================================================
// Copy / Paste
QString QEPeriodic::copyVariable()
{
QString text;
for( int i = 0; i < QEPERIODIC_NUM_VARIABLES; i++ )
{
QString pv = getSubstitutedVariableName(i);
if( !pv.isEmpty() )
{
if( !text.isEmpty() )
text.append( " " );
text.append( pv );
}
}
return text;
// return getSubstitutedVariableName(0);
}
/*
Implement a slot to set the current text of the push button
This is the slot used to recieve data updates from a QCaObject based class.
*/
void QEGenericButton::setGenericButtonText( const QString& text, QCaAlarmInfo& alarmInfo, QCaDateTime&, const unsigned int& variableIndex )
{
// If not subscribing, or subscribing but update is not for the readback variable, then do nothing.
//
// Note, This will still be called even if not subscribing as there may be an initial sing shot read
// to ensure we have valid information about the variable when it is time to do a write.
//
// Note, variableIndex = 0 = Primary readback variable, variableIndex = 1 = Alternate readback variable,
// so an update for variable 1 is always OK, an update from variable 0 is OK as long as there is no variable 1
if( !subscribe || ( variableIndex == 0 && !getSubstitutedVariableName( 1 ).isEmpty() ))
{
return;
}
// Signal a database value change to any Link widgets
emitDbValueChanged( text );
// Update the button state if required
// Display checked if text matches what is written when checked
if( updateOption == UPDATE_STATE )
{
setButtonState( !text.compare( clickCheckedText ) );
}
// Update the text if required
if( updateOption == UPDATE_TEXT || updateOption == UPDATE_TEXT_AND_ICON )
{
setButtonText( text );
}
// Update the icon if required
if( updateOption == UPDATE_ICON || updateOption == UPDATE_TEXT_AND_ICON )
{
QIcon icon;
icon.addPixmap( getDataPixmap( text ) );
setButtonIcon( icon );
}
// Invoke common alarm handling processing.
processAlarmInfo( alarmInfo, variableIndex );
}
//==============================================================================
// Copy paste
QString QESpinBox::copyVariable()
{
return getSubstitutedVariableName( 0 );
}
QVariant QESpinBox::getDrop()
{
return QVariant( getSubstitutedVariableName(0) );
}
/*
Implementation of QEWidget's virtual funtion to create the specific type of QCaObject required.
For a spin box a QCaObject that streams integers is required.
*/
qcaobject::QCaObject* QESpinBox::createQcaItem( unsigned int variableIndex ) {
// Create the item as a QEInteger
return new QEFloating( getSubstitutedVariableName( variableIndex ), this, &floatingFormatting, variableIndex );
}
/*!
Implementation of QCaWidget's virtual funtion to create the specific type of QCaObject required.
For a line edit a QCaObject that streams strings is required.
*/
qcaobject::QCaObject* QCaLineEdit::createQcaItem( unsigned int variableIndex ) {
// Create the item as a QCaString
return new QCaString( getSubstitutedVariableName( variableIndex ), this, &stringFormatting, variableIndex );
}
//==============================================================================
// Copy / Paste
QString QESlider::copyVariable()
{
return getSubstitutedVariableName(0);
}
//==============================================================================
// Copy / Paste
QString QEGenericEdit::copyVariable()
{
return getSubstitutedVariableName(0);
}
//------------------------------------------------------------------------------
//
QVariant QEGenericEdit::getDrop()
{
return QVariant( getSubstitutedVariableName(0) );
}
//==============================================================================
// Copy / Paste
QString QELabel::copyVariable()
{
return getSubstitutedVariableName(0);
}
/*
Implementation of QEWidget's virtual funtion to create the specific type of QCaObject required.
For a push button a QCaObject that streams strings is required.
*/
qcaobject::QCaObject* QEGenericButton::createQcaItem( unsigned int variableIndex ) {
// Create the item as a QEString
return new QEString( getSubstitutedVariableName( variableIndex ), getButtonQObject(), &stringFormatting, variableIndex );
}
