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# qlistview.h

This is the verbatim text of the qlistview.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id: qt/src/widgets/qlistview.h   2.3.7   edited 2001-01-26 $
    **
    ** Definition of QListView widget class
    **
    ** Created : 970809
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the widgets module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
    ** licenses may use this file in accordance with the Qt Commercial License
    ** Agreement provided with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    **********************************************************************/

    #ifndef QLISTVIEW_H
    #define QLISTVIEW_H

    class QPixmap;
    class QFont;
    class QHeader;
    class QIconSet;

    class QListView;
    struct QListViewPrivate;
    class QListViewItemIterator;

    #ifndef QT_H
    #include "qscrollview.h"
    #endif // QT_H

    #ifndef QT_NO_LISTVIEW

    class Q_EXPORT QListViewItem: public Qt
    {
        friend class QListViewItemIterator;
    #if defined(_CC_MSVC_)
        friend class QListViewItem;
    #endif

    public:
        QListViewItem( QListView * parent );
        QListViewItem( QListViewItem * parent );
        QListViewItem( QListView * parent, QListViewItem * after );
        QListViewItem( QListViewItem * parent, QListViewItem * after );

        QListViewItem( QListView * parent,
                       QString,     QString = QString::null,
                       QString = QString::null, QString = QString::null,
                       QString = QString::null, QString = QString::null,
                       QString = QString::null, QString = QString::null );
        QListViewItem( QListViewItem * parent,
                       QString,     QString = QString::null,
                       QString = QString::null, QString = QString::null,
                       QString = QString::null, QString = QString::null,
                       QString = QString::null, QString = QString::null );

        QListViewItem( QListView * parent, QListViewItem * after,
                       QString,     QString = QString::null,
                       QString = QString::null, QString = QString::null,
                       QString = QString::null, QString = QString::null,
                       QString = QString::null, QString = QString::null );
        QListViewItem( QListViewItem * parent, QListViewItem * after,
                       QString,     QString = QString::null,
                       QString = QString::null, QString = QString::null,
                       QString = QString::null, QString = QString::null,
                       QString = QString::null, QString = QString::null );
        virtual ~QListViewItem();

        virtual void insertItem( QListViewItem * );
        virtual void takeItem( QListViewItem * );
        virtual void removeItem( QListViewItem * ); //obsolete, use takeItem instead

        int height() const;
        virtual void invalidateHeight();
        int totalHeight() const;
        virtual int width( const QFontMetrics&,
                           const QListView*, int column) const;
        void widthChanged(int column=-1) const;
        int depth() const;

        virtual void setText( int, const QString &);
        virtual QString text( int ) const;

        virtual void setPixmap( int, const QPixmap & );
        virtual const QPixmap * pixmap( int ) const;

        virtual QString key( int, bool ) const;
        virtual void sortChildItems( int, bool );

        int childCount() const { return nChildren; }

        bool isOpen() const { return open; }
        virtual void setOpen( bool );
        virtual void setup();

        virtual void setSelected( bool );
        bool isSelected() const { return selected; }

        virtual void paintCell( QPainter *, const QColorGroup & cg,
                                int column, int width, int alignment );
        virtual void paintBranches( QPainter * p, const QColorGroup & cg,
                                    int w, int y, int h, GUIStyle s );
        virtual void paintFocus( QPainter *, const QColorGroup & cg,
                                 const QRect & r );

        QListViewItem * firstChild() const;
        QListViewItem * nextSibling() const { return siblingItem; }
        QListViewItem * parent() const;

        QListViewItem * itemAbove();
        QListViewItem * itemBelow();

        int itemPos() const;

        QListView *listView() const;

        virtual void setSelectable( bool enable );
        bool isSelectable() const { return selectable; }

        virtual void setExpandable( bool );
        bool isExpandable() const { return expandable; }

        void repaint() const;

        void sort(); // ######## make virtual in next major release
        void moveItem( QListViewItem *after );

    protected:
        virtual void enforceSortOrder() const;
        virtual void setHeight( int );
        virtual void activate();

        bool activatedPos( QPoint & );
    private:
        void init();
        void moveToJustAfter( QListViewItem * );
        int ownHeight;
        int maybeTotalHeight;
        int nChildren;

        uint lsc: 14;
        uint lso: 1;
        uint open : 1;
        uint selected : 1;
        uint selectable: 1;
        uint configured: 1;
        uint expandable: 1;
        uint is_root: 1;

        QListViewItem * parentItem;
        QListViewItem * siblingItem;
        QListViewItem * childItem;

        void * columns;

        friend class QListView;
    };

    class QCheckListItem;

    class Q_EXPORT QListView: public QScrollView
    {
        friend class QListViewItemIterator;
        friend class QListViewItem;
        friend class QCheckListItem;

        Q_OBJECT
        Q_ENUMS( SelectionMode )
        Q_PROPERTY( int columns READ columns )
        Q_PROPERTY( bool multiSelection READ isMultiSelection WRITE setMultiSelection DESIGNABLE false )
        Q_PROPERTY( SelectionMode selectionMode READ selectionMode WRITE setSelectionMode )
        Q_PROPERTY( int childCount READ childCount )
        Q_PROPERTY( bool allColumnsShowFocus READ allColumnsShowFocus WRITE setAllColumnsShowFocus )
        Q_PROPERTY( bool showSortIndicator READ showSortIndicator WRITE setShowSortIndicator )
        Q_PROPERTY( int itemMargin READ itemMargin WRITE setItemMargin )
        Q_PROPERTY( bool rootIsDecorated READ rootIsDecorated WRITE setRootIsDecorated )

    public:
        QListView( QWidget * parent, const char *name, WFlags f );
        QListView( QWidget * parent = 0, const char *name = 0 ); // ##### merge with above in 3.0
        ~QListView();

        int treeStepSize() const;
        virtual void setTreeStepSize( int );

        virtual void insertItem( QListViewItem * );
        virtual void takeItem( QListViewItem * );
        virtual void removeItem( QListViewItem * ); // obsolete, use takeItem instead

        virtual void clear();

        QHeader * header() const;

        virtual int addColumn( const QString &label, int size = -1);
        virtual int addColumn( const QIconSet& iconset, const QString &label, int size = -1);
        void removeColumn( int index ); // #### make virtual in next major release!
        virtual void setColumnText( int column, const QString &label );
        virtual void setColumnText( int column, const QIconSet& iconset, const QString &label );
        QString columnText( int column ) const;
        virtual void setColumnWidth( int column, int width );
        int columnWidth( int column ) const;
        enum WidthMode { Manual, Maximum };
        virtual void setColumnWidthMode( int column, WidthMode );
        WidthMode columnWidthMode( int column ) const;
        int columns() const;

        virtual void setColumnAlignment( int, int );
        int columnAlignment( int ) const;

        void show();

        QListViewItem * itemAt( const QPoint & screenPos ) const;
        QRect itemRect( const QListViewItem * ) const;
        int itemPos( const QListViewItem * );

        void ensureItemVisible( const QListViewItem * );

        void repaintItem( const QListViewItem * ) const;

        virtual void setMultiSelection( bool enable );
        bool isMultiSelection() const;

        enum SelectionMode { Single, Multi, Extended, NoSelection  };
        void setSelectionMode( SelectionMode mode );
        SelectionMode selectionMode() const;

        virtual void clearSelection();
        virtual void setSelected( QListViewItem *, bool );
        bool isSelected( const QListViewItem * ) const;
        QListViewItem * selectedItem() const;
        virtual void setOpen( QListViewItem *, bool );
        bool isOpen( const QListViewItem * ) const;

        virtual void setCurrentItem( QListViewItem * );
        QListViewItem * currentItem() const;

        QListViewItem * firstChild() const;

        int childCount() const;

        virtual void setAllColumnsShowFocus( bool );
        bool allColumnsShowFocus() const;

        virtual void setItemMargin( int );
        int itemMargin() const;

        virtual void setRootIsDecorated( bool );
        bool rootIsDecorated() const;

        virtual void setSorting( int column, bool increasing = TRUE );
        void sort(); // #### make virtual in next major release

        virtual void setFont( const QFont & );
        virtual void setPalette( const QPalette & );

        bool eventFilter( QObject * o, QEvent * );

        QSize sizeHint() const;
        QSize minimumSizeHint() const;

        void setShowSortIndicator( bool show );
        bool showSortIndicator() const;

    public slots:
        void invertSelection(); // ###### make virtual
        void selectAll( bool select ); // make virtual
        void triggerUpdate();
        void setContentsPos( int x, int y );

    signals:
        void selectionChanged();
        void selectionChanged( QListViewItem * );
        void currentChanged( QListViewItem * );
        void clicked( QListViewItem * );
        void clicked( QListViewItem *, const QPoint &, int );
        void pressed( QListViewItem * );
        void pressed( QListViewItem *, const QPoint &, int );

        void doubleClicked( QListViewItem * );
        void returnPressed( QListViewItem * );
        void rightButtonClicked( QListViewItem *, const QPoint&, int );
        void rightButtonPressed( QListViewItem *, const QPoint&, int );
        void mouseButtonPressed( int, QListViewItem *, const QPoint& , int );
        void mouseButtonClicked( int, QListViewItem *,  const QPoint&, int );

        void onItem( QListViewItem *item );
        void onViewport();

        void expanded( QListViewItem *item );
        void collapsed( QListViewItem *item );

    protected:
        void contentsMousePressEvent( QMouseEvent * e );
        void contentsMouseReleaseEvent( QMouseEvent * e );
        void contentsMouseMoveEvent( QMouseEvent * e );
        void contentsMouseDoubleClickEvent( QMouseEvent * e );

        void focusInEvent( QFocusEvent * e );
        void focusOutEvent( QFocusEvent * e );

        void keyPressEvent( QKeyEvent *e );

        void resizeEvent( QResizeEvent *e );

        void showEvent( QShowEvent * );

        void drawContentsOffset( QPainter *, int ox, int oy,
                                 int cx, int cy, int cw, int ch );

        virtual void paintEmptyArea( QPainter *, const QRect & );
        void enabledChange( bool );
        void styleChange( QStyle& );

    protected slots:
        void updateContents();
        void doAutoScroll();

    private slots:
        void changeSortColumn( int );
        void updateDirtyItems();
        void makeVisible();
        void handleSizeChange( int, int, int );

    private:
        void init();
        void updateGeometries();
        void buildDrawableList() const;
        void reconfigureItems();
        void widthChanged(const QListViewItem*, int c);
        void handleItemChange( QListViewItem *old, bool shift, bool control );
        void selectRange( QListViewItem *from, QListViewItem *to, bool invert, bool includeFirst, bool clearSel = FALSE );

        QListViewPrivate * d;

    private:        // Disabled copy constructor and operator=
    #if defined(Q_DISABLE_COPY)
        QListView( const QWidget & );
        QListView &operator=( const QWidget & );
    #endif
    };

    class Q_EXPORT QCheckListItem : public QListViewItem
    {
    public:
        enum Type { RadioButton, CheckBox, Controller };

        QCheckListItem( QCheckListItem *parent, const QString &text,
                        Type = Controller );
        QCheckListItem( QListViewItem *parent, const QString &text,
                        Type = Controller );
        QCheckListItem( QListView *parent, const QString &text,
                        Type = Controller );
        QCheckListItem( QListViewItem *parent, const QString &text,
                        const QPixmap & );
        QCheckListItem( QListView *parent, const QString &text,
                        const QPixmap & );
        ~QCheckListItem();

        void paintCell( QPainter *,  const QColorGroup & cg,
                        int column, int width, int alignment );
        virtual void paintFocus( QPainter *, const QColorGroup & cg,
                                 const QRect & r );
        int width( const QFontMetrics&, const QListView*, int column) const;
        void setup();

        virtual void setOn( bool );
        bool isOn() const { return on; }
        Type type() const { return myType; }
        QString text() const { return QListViewItem::text( 0 ); }
        QString text( int n ) const { return QListViewItem::text( n ); }

        void setEnabled( bool b );
        bool isEnabled() const;

    protected:
        void paintBranches( QPainter * p, const QColorGroup & cg,
                            int w, int y, int h, GUIStyle s );

        void activate();
        void turnOffChild();
        virtual void stateChange( bool );

    private:
        void init();
        Type myType;
        bool on;
        QCheckListItem *exclusive;

        void *reserved;
    };

    class Q_EXPORT QListViewItemIterator
    {
        friend struct QListViewPrivate;
        friend class QListView;
        friend class QListViewItem;

    public:
        QListViewItemIterator();
        QListViewItemIterator( QListViewItem *item );
        QListViewItemIterator( const QListViewItemIterator &it );
        QListViewItemIterator( QListView *lv );

        QListViewItemIterator &operator=( const QListViewItemIterator &it );

        ~QListViewItemIterator();

        QListViewItemIterator &operator++();
        const QListViewItemIterator operator++( int );
        QListViewItemIterator &operator+=( int j );

        QListViewItemIterator &operator--();
        const QListViewItemIterator operator--( int );
        QListViewItemIterator &operator-=( int j );

        QListViewItem *current() const;

    protected:
        QListViewItem *curr;
        QListView *listView;

    private:
        void addToListView();
        void currentRemoved();

    };

    #endif // QT_NO_LISTVIEW

    #endif // QLISTVIEW_H