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koffice/kexi/plugins/forms/kexidataprovider.cpp

316 lines
13 KiB

/* This file is part of the KDE project
Copyright (C) 2005-2006 Jaroslaw Staniek <js@iidea.pl>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "kexidataprovider.h"
#include <tqwidget.h>
#include <tqobjectlist.h>
#include <kdebug.h>
#include <klocale.h>
#include <widget/tableview/kexitableitem.h>
#include <widget/tableview/kexitableviewdata.h>
#include <widget/tableview/kexicomboboxbase.h>
#include <kexidb/queryschema.h>
#include <kexiutils/utils.h>
#include "widgets/kexidbform.h"
KexiFormDataProvider::KexiFormDataProvider()
: KexiDataItemChangesListener()
, m_mainWidget(0)
, m_duplicatedItems(0)
, m_disableFillDuplicatedDataItems(false)
{
}
KexiFormDataProvider::~KexiFormDataProvider()
{
delete m_duplicatedItems;
}
void KexiFormDataProvider::setMainDataSourceWidget(TQWidget* mainWidget)
{
m_mainWidget = mainWidget;
m_dataItems.clear();
m_usedDataSources.clear();
m_fieldNumbersForDataItems.clear();
if (!m_mainWidget)
return;
//find widgets whose will work as data items
TQObjectList *l = m_mainWidget->queryList( TQWIDGET_OBJECT_NAME_STRING );
TQObjectListIt it( *l );
TQObject *obj;
TQDict<char> tmpSources;
for ( ; (obj = it.current()) != 0; ++it ) {
KexiFormDataItemInterface* const formDataItem = dynamic_cast<KexiFormDataItemInterface*>(obj);
if (!formDataItem)
continue;
if (formDataItem->parentInterface()) //item with parent interface: collect parent instead...
continue;
#if 0 //! @todo reenable when subform is moved to KexiDBForm
KexiDBForm *dbForm = KexiUtils::findParent<KexiDBForm>(obj, "KexiDBForm"); //form's surface...
if (dbForm!=m_mainWidget) //only set data for this form's data items
continue;
#else
//tmp: reject widgets within subforms
if (KexiUtils::findParent<KexiDBForm>(obj, "KexiDBSubForm"))
continue;
#endif
TQString dataSource( formDataItem->dataSource().lower() );
if (dataSource.isEmpty())
continue;
kexipluginsdbg << obj->name() << endl;
m_dataItems.append( formDataItem );
formDataItem->installListener( this );
tmpSources.replace( dataSource, (char*)1 );
}
delete l;
//now we've got a set (unique list) of field names in tmpSources
//remember it in m_usedDataSources
for (TQDictIterator<char> it(tmpSources); it.current(); ++it) {
m_usedDataSources += it.currentKey();
}
}
void KexiFormDataProvider::fillDataItems(KexiTableItem& row, bool cursorAtNewRow)
{
kexipluginsdbg << "KexiFormDataProvider::fillDataItems() cnt=" << row.count() << endl;
for (KexiFormDataItemInterfaceToIntMap::ConstIterator it = m_fieldNumbersForDataItems.constBegin();
it!=m_fieldNumbersForDataItems.constEnd(); ++it)
{
KexiFormDataItemInterface *itemIface = it.key();
if (!itemIface->columnInfo()) {
kexipluginsdbg << "KexiFormDataProvider::fillDataItems(): itemIface->columnInfo() == 0" << endl;
continue;
}
//1. Is this a value with a combo box (lookup)?
int indexForVisibleLookupValue = itemIface->columnInfo()->indexForVisibleLookupValue();
if (indexForVisibleLookupValue<0 && indexForVisibleLookupValue>=(int)row.count()) //sanity
indexForVisibleLookupValue = -1; //no
const TQVariant value(row.at(it.data()));
TQVariant visibleLookupValue;
if (indexForVisibleLookupValue!=-1 && (int)row.size()>indexForVisibleLookupValue)
visibleLookupValue = row.at(indexForVisibleLookupValue);
kexipluginsdbg << "fill data of '" << itemIface->dataSource() << "' at idx=" << it.data()
<< " data=" << value << (indexForVisibleLookupValue!=-1
? TQString(" SPECIAL: indexForVisibleLookupValue=%1 visibleValue=%2")
.tqarg(indexForVisibleLookupValue).tqarg(visibleLookupValue.toString())
: TQString())
<< endl;
const bool displayDefaultValue = cursorAtNewRow && (value.isNull() && visibleLookupValue.isNull())
&& !itemIface->columnInfo()->field->defaultValue().isNull()
&& !itemIface->columnInfo()->field->isAutoIncrement(); //no value to set but there is default value defined
itemIface->setValue(
displayDefaultValue ? itemIface->columnInfo()->field->defaultValue() : value,
TQVariant(), /*add*/
/*!remove old*/false,
indexForVisibleLookupValue==-1 ? 0 : &visibleLookupValue //pass visible value if available
);
// now disable/enable "display default value" if needed (do it after setValue(), before setValue() turns it off)
if (itemIface->hasDisplayedDefaultValue() != displayDefaultValue)
itemIface->setDisplayDefaultValue( dynamic_cast<TQWidget*>(itemIface), displayDefaultValue );
}
}
void KexiFormDataProvider::fillDuplicatedDataItems(
KexiFormDataItemInterface* item, const TQVariant& value)
{
if (m_disableFillDuplicatedDataItems)
return;
if (!m_duplicatedItems) {
//build (once) a set of duplicated data items (having the same fields assigned)
//so we can later check if an item is duplicated with a cost of o(1)
TQMap<KexiDB::Field*,int> tmpDuplicatedItems;
TQMapIterator<KexiDB::Field*,int> it_dup;
for (TQPtrListIterator<KexiFormDataItemInterface> it(m_dataItems); it.current(); ++it) {
if (!it.current()->columnInfo() || !it.current()->columnInfo()->field)
continue;
kdDebug() << " ** " << it.current()->columnInfo()->field->name() << endl;
it_dup = tmpDuplicatedItems.find( it.current()->columnInfo()->field );
uint count;
if (it_dup==tmpDuplicatedItems.end())
count = 0;
else
count = it_dup.data();
tmpDuplicatedItems.insert( it.current()->columnInfo()->field, ++count );
}
m_duplicatedItems = new TQPtrDict<char>(101);
for (it_dup = tmpDuplicatedItems.begin(); it_dup!=tmpDuplicatedItems.end(); ++it_dup) {
if (it_dup.data() > 1) {
m_duplicatedItems->insert( it_dup.key(), (char*)1 );
kexipluginsdbg << "duplicated item: " << static_cast<KexiDB::Field*>(it_dup.key())->name()
<< " (" << it_dup.data() << " times)" << endl;
}
}
}
if (item->columnInfo() && m_duplicatedItems->find( item->columnInfo()->field )) {
for (TQPtrListIterator<KexiFormDataItemInterface> it(m_dataItems); it.current(); ++it) {
if (it.current()!=item && item->columnInfo()->field == it.current()->columnInfo()->field) {
kexipluginsdbg << "- setting a copy of value for item '"
<< dynamic_cast<TQObject*>(it.current())->name() << "' == " << value << endl;
it.current()->setValue( value );
}
}
}
}
void KexiFormDataProvider::valueChanged(KexiDataItemInterface* item)
{
Q_UNUSED( item );
}
bool KexiFormDataProvider::cursorAtNewRow() const
{
return false;
}
void KexiFormDataProvider::invalidateDataSources( const TQDict<char>& invalidSources,
KexiDB::QuerySchema* query)
{
//fill m_fieldNumbersForDataItems mapping from data item to field number
//(needed for fillDataItems)
KexiDB::QueryColumnInfo::Vector fieldsExpanded;
// uint dataFieldsCount; // == fieldsExpanded.count() if query is available or else == m_dataItems.count()
if (query) {
fieldsExpanded = query->fieldsExpanded( KexiDB::QuerySchema::WithInternalFields );
// dataFieldsCount = fieldsExpanded.count();
TQMap<KexiDB::QueryColumnInfo*,int> columnsOrder( query->columnsOrder() );
for (TQMapConstIterator<KexiDB::QueryColumnInfo*,int> it = columnsOrder.constBegin(); it!=columnsOrder.constEnd(); ++it) {
kexipluginsdbg << "query->columnsOrder()[ " << it.key()->field->name() << " ] = " << it.data() << endl;
}
for (TQPtrListIterator<KexiFormDataItemInterface> it(m_dataItems); it.current(); ++it) {
KexiFormDataItemInterface *item = it.current();
KexiDB::QueryColumnInfo* ci = query->columnInfo( it.current()->dataSource() );
int index = ci ? columnsOrder[ ci ] : -1;
kexipluginsdbg << "query->columnsOrder()[ " << (ci ? ci->field->name() : "") << " ] = " << index
<< " (dataSource: " << item->dataSource() << ", name=" << dynamic_cast<TQObject*>(item)->name() << ")" << endl;
if (index!=-1 && !m_fieldNumbersForDataItems[ item ])
m_fieldNumbersForDataItems.insert( item, index );
//todo
//WRONG: not only used data sources can be fetched!
// m_fieldNumbersForDataItems.insert( it.current(),
// m_usedDataSources.findIndex(it.current()->dataSource().lower()) );
}
}
else {//!query
// dataFieldsCount = m_dataItems.count();
}
#if 0 //moved down
//in 'newIndices' let's collect new indices for every data source
foreach(TQValueList<uint>::ConstIterator, it, invalidSources) {
//all previous indices have corresponding data source
// for (; i < (*it); i++) {
// newIndices[i] = number++;
//kexipluginsdbg << "invalidateDataSources(): " << i << " -> " << number-1 << endl;
// }
//this index have no corresponding data source
// newIndices[i]=-1;
KexiFormDataItemInterface *item = m_dataItems.at( *it );
if (item)
item->setInvalidState( TQString::fromLatin1("#") + i18n("NAME") + TQString::fromLatin1("?") );
m_dataItems.remove(*it);
kexipluginsdbg << "invalidateDataSources(): " << (*it) << " -> " << -1 << endl;
// i++;
}
#endif
//fill remaining part of the vector
// for (; i < dataFieldsCount; i++) { //m_dataItems.count(); i++) {
//newIndices[i] = number++;
//kexipluginsdbg << "invalidateDataSources(): " << i << " -> " << number-1 << endl;
//}
#if 0
//recreate m_fieldNumbersForDataItems and mark widgets with invalid data sources
KexiFormDataItemInterfaceToIntMap newFieldNumbersForDataItems;
foreach(KexiFormDataItemInterfaceToIntMap::ConstIterator, it, m_fieldNumbersForDataItems) {
bool ok;
const int newIndex = newIndices.at( it.data(), &ok );
if (ok && newIndex!=-1) {
kexipluginsdbg << "invalidateDataSources(): " << it.key()->dataSource() << ": " << it.data() << " -> " << newIndex << endl;
newFieldNumbersForDataItems.replace(it.key(), newIndex);
}
else {
kexipluginsdbg << "invalidateDataSources(): removing " << it.key()->dataSource() << endl;
m_dataItems.remove(it.key());
it.key()->setInvalidState( TQString::fromLatin1("#") + i18n("NAME") + TQString::fromLatin1("?") );
}
}
#endif
// m_fieldNumbersForDataItems = newFieldNumbersForDataItems;
//update data sources set (some of them may be removed)
TQDict<char> tmpUsedDataSources(1013);
if (query)
query->debug();
//if (query && m_dataItems.count()!=query->fieldCount()) {
// kdWarning() << "KexiFormDataProvider::invalidateDataSources(): m_dataItems.count()!=query->fieldCount() ("
// << m_dataItems.count() << "," << query->fieldCount() << ")" << endl;
//}
//i = 0;
m_disableFillDuplicatedDataItems = true; // temporary disable fillDuplicatedDataItems()
// because setColumnInfo() can activate it
for (TQPtrListIterator<KexiFormDataItemInterface> it(m_dataItems); it.current();) {
KexiFormDataItemInterface * item = it.current();
if (invalidSources[ item->dataSource().lower() ]) {
item->setInvalidState( TQString::fromLatin1("#") + i18n("NAME") + TQString::fromLatin1("?") );
m_dataItems.remove(item);
continue;
}
uint fieldNumber = m_fieldNumbersForDataItems[ item ];
if (query) {
KexiDB::QueryColumnInfo *ci = fieldsExpanded[fieldNumber];
item->setColumnInfo(ci);
kexipluginsdbg << "- item=" << dynamic_cast<TQObject*>(item)->name()
<< " dataSource=" << item->dataSource()
<< " field=" << ci->field->name() << endl;
const int indexForVisibleLookupValue = ci->indexForVisibleLookupValue();
if (-1 != indexForVisibleLookupValue && indexForVisibleLookupValue < (int)fieldsExpanded.count()) {
//there's lookup column defined: set visible column as well
KexiDB::QueryColumnInfo *visibleColumnInfo = fieldsExpanded[ indexForVisibleLookupValue ];
if (visibleColumnInfo) {
item->setVisibleColumnInfo( visibleColumnInfo );
if (dynamic_cast<KexiComboBoxBase*>(item) && m_mainWidget
&& dynamic_cast<KexiComboBoxBase*>(item)->internalEditor())
{
// m_mainWidget (dbform) should filter the (just created using setVisibleColumnInfo())
// combo box' internal editor (actually, only if the combo is in 'editable' mode)
dynamic_cast<KexiComboBoxBase*>(item)->internalEditor()->installEventFilter(m_mainWidget);
}
kexipluginsdbg << " ALSO SET visibleColumn=" << visibleColumnInfo->debugString()
<< "\n at position " << indexForVisibleLookupValue << endl;
}
}
}
tmpUsedDataSources.replace( item->dataSource().lower(), (char*)1 );
++it;
}
m_disableFillDuplicatedDataItems = false;
m_usedDataSources.clear();
foreach_list(TQDictIterator<char>, it, tmpUsedDataSources) {
m_usedDataSources += it.currentKey();
}
}