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/* This file is part of the KDE project
Copyright (C) 2002 Peter Simonsson <psn@linux.se>
Copyright (C) 2003-2007 Jaroslaw Staniek <js@iidea.pl>
This program 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 program 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 program; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef _KEXICOMBOBOXBASE_H_
#define _KEXICOMBOBOXBASE_H_
#include "kexidb/field.h"
#include "kexiinputtableedit.h"
#include <kexidb/lookupfieldschema.h>
class KPushButton;
class KLineEdit;
class KexiComboBoxPopup;
class KexiTableItem;
class KexiTableViewColumn;
/*! @short A base class for handling data-aware combo boxes.
This class is used by KexiComboBoxTableEdit and KexiDBComboBox.
*/
class KEXIDATATABLE_EXPORT KexiComboBoxBase
{
public:
KexiComboBoxBase();
virtual ~KexiComboBoxBase();
//! \return column related to this combo; for KexiComboBoxTableEdit 0 is returned here
virtual KexiTableViewColumn *column() const = 0;
//! \return database field related to this combo
virtual KexiDB::Field *field() const = 0;
//! \return the original value
virtual QVariant origValue() const = 0;
//! Note: Generally in current implementation this is integer > 0; may be null if no value is set
virtual QVariant value();
virtual QVariant visibleValue();
//! Reimplement this and call this impl.: used to clear internal editor
virtual void clear();
virtual tristate valueChangedInternal();
virtual bool valueIsNull();
virtual bool valueIsEmpty();
public:
virtual void hide();
void createPopup(bool show);
void showPopup();
//! Call this from slot
virtual void slotRowAccepted(KexiTableItem *item, int row);
//! Call this from slot
virtual void slotItemSelected(KexiTableItem*);
//! Call this from slot
void slotInternalEditorValueChanged(const QVariant &v);
//! Implement this to return the internal editor
virtual QWidget *internalEditor() const = 0;
protected:
virtual void setValueInternal(const QVariant& add, bool removeOld);
//! Used to select row item for an user-entered value \a v.
//! Only for "lookup table" mode.
KexiTableItem* selectItemForEnteredValueInLookupTable(const QVariant& v);
/*! \return value from \a returnFromColumn related to \a str value from column \a lookInColumn.
If \a allowNulls is true, NULL is returend if no matched column found, else:
\a str is returned.
Example: lookInColumn=0, returnFromColumn=1 --returns user-visible string
for column #1 for id-column #0 */
QString valueForString(const QString& str, int* row, uint lookInColumn,
uint returnFromColumn, bool allowNulls = false);
//! sets \a value for the line edit without setting a flag (m_userEnteredValue) that indicates that
//! the text has been entered by hand (by a user)
void setValueOrTextInInternalEditor(const QVariant& value); //QString& text);
//! \return lookup field schema for this combo box, if present and if is valid (i.e. has defined row source)
KexiDB::LookupFieldSchema* lookupFieldSchema() const;
int rowToHighlightForLookupTable() const;
//! Implement this to perform "move cursor to end" in the internal editor
virtual void moveCursorToEndInInternalEditor() = 0;
//! Implement this to perform "select all" in the internal editor
virtual void selectAllInInternalEditor() = 0;
//! Implement this to perform "set value" in the internal editor
virtual void setValueInInternalEditor(const QVariant& value) = 0;
//! Implement this to return value from the internal editor
virtual QVariant valueFromInternalEditor() = 0;
//! Implement this as signal
virtual void editRequested() = 0;
//! Implement this as signal
virtual void acceptRequested() = 0;
//! Implement this to return a position \a pos mapped from parent (e.g. viewport)
//! to global coordinates. QPoint(-1, -1) should be returned if this cannot be computed.
virtual QPoint mapFromParentToGlobal(const QPoint& pos) const = 0;
//! Implement this to return a hint for popup width.
virtual int popupWidthHint() const = 0;
//! Implement this to update button state. Table view just updates on/off state
//! for the button depending on visibility of the popup
virtual void updateButton() {}
virtual KexiComboBoxPopup *popup() const = 0;
virtual void setPopup(KexiComboBoxPopup *popup) = 0;
virtual QVariant visibleValueForLookupField();
void updateTextForHighlightedRow();
bool handleKeyPressForPopup( QKeyEvent *ke );
void acceptPopupSelection();
//! Used by KexiDBComboBox.
void undoChanges();
QVariant m_visibleValue;
QVariant m_userEnteredValue; //!< value (usually a text) entered by hand (by the user)
bool m_internalEditorValueChanged : 1; //!< true if user has text or other value inside editor
bool m_slotInternalEditorValueChanged_enabled : 1; //!< Used in slotInternalEditorValueChanged()
bool m_setValueOrTextInInternalEditor_enabled : 1; //!< Used in setValueOrTextInInternalEditor() and slotItemSelected()
bool m_mouseBtnPressedWhenPopupVisible : 1; //!< Used only by KexiComboBoxTableEdit
bool m_insideCreatePopup : 1; //!< true if we're inside createPopup(); used in slotItemSelected()
bool m_updatePopupSelectionOnShow : 1; //!< Set to false as soon as the item corresponding with the current
//!< value is selected in the popup table. This avoids selecting item
//!< for origValue() and thus loosing the recent choice.
bool m_moveCursorToEndInInternalEditor_enabled : 1;
bool m_selectAllInInternalEditor_enabled : 1;
bool m_setValueInInternalEditor_enabled : 1;
bool m_setVisibleValueOnSetValueInternal : 1; //!< Used in setValueInternal() to control whether
//!< we want to set visible value on setValueInternal()
//!< - true for table view's combo box
};
#endif
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