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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. 

/****************************************************************************
** $Id$
**
** Definition of QListView widget class
**
** Created : 970809
**
** Copyright (C) 1992-2002 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

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

#ifndef QT_NO_LISTVIEW


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

class QListView;
struct QListViewPrivate;
struct QCheckListItemPrivate;
class QListViewItemIterator;
struct QListViewItemIteratorPrivate;
class QDragObject;
class QMimeSource;
class QLineEdit;
class QListViewToolTip;

class Q_EXPORT QListViewItem : public Qt
{
    friend class QListViewItemIterator;
    friend class QListViewToolTip;
#if defined(Q_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 *item ) { takeItem( item ); } //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 int compare( QListViewItem *i, int col, 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 );
    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 && enabled; }

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

    void repaint() const;

    virtual void sort();
    void moveItem( QListViewItem *after );

    virtual void setDragEnabled( bool allow );
    virtual void setDropEnabled( bool allow );
    bool dragEnabled() const;
    bool dropEnabled() const;
    virtual bool acceptDrop( const QMimeSource *mime ) const;

    void setVisible( bool b );
    bool isVisible() const;

    virtual void setRenameEnabled( int col, bool b );
    bool renameEnabled( int col ) const;
    virtual void startRename( int col );

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

    virtual int rtti() const;
    // ### Qt 4: make const or better use an enum
    static int RTTI;

    virtual void setMultiLinesEnabled( bool b );
    bool multiLinesEnabled() const;

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

    bool activatedPos( QPoint & );
#ifndef QT_NO_DRAGANDDROP
    virtual void dropped( QDropEvent *e );
#endif
    virtual void dragEntered();
    virtual void dragLeft();
    virtual void okRename( int col );
    virtual void cancelRename( int col );

    void ignoreDoubleClick();

private:
    void init();
    void moveToJustAfter( QListViewItem * );
    void enforceSortOrderBackToRoot();
    void removeRenameBox();

    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;
    uint allow_drag : 1;
    uint allow_drop : 1;
    uint visible : 1;
    uint enabled : 1;
    uint mlenabled : 1;

    QListViewItem * parentItem;
    QListViewItem * siblingItem;
    QListViewItem * childItem;
    QLineEdit *renameBox;
    int renameCol;

    void * columns;

    friend class QListView;
};

class QCheckListItem;

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

    Q_OBJECT
    Q_ENUMS( SelectionMode ResizeMode RenameAction )
    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 )
    Q_PROPERTY( bool showToolTips READ showToolTips WRITE setShowToolTips )
    Q_PROPERTY( ResizeMode resizeMode READ resizeMode WRITE setResizeMode )
    Q_PROPERTY( int treeStepSize READ treeStepSize WRITE setTreeStepSize )
    Q_PROPERTY( RenameAction defaultRenameAction READ defaultRenameAction WRITE setDefaultRenameAction )

public:
    QListView( QWidget* parent=0, const char* name=0, WFlags f = 0 );
    ~QListView();

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

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

    QHeader * header() const;

    virtual int addColumn( const QString &label, int size = -1);
    virtual int addColumn( const QIconSet& iconset, const QString &label, int size = -1);
    virtual void removeColumn( int index );
    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 );
    void setSelectionAnchor( QListViewItem * );
    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;
    QListViewItem * lastItem() 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 ascending = TRUE );
    int sortColumn() const;
    void setSortColumn( int column );
    SortOrder sortOrder() const;
    void setSortOrder( SortOrder order );
    virtual void sort();

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

    bool eventFilter( QObject * o, QEvent * );

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

    virtual void setShowSortIndicator( bool show );
    bool showSortIndicator() const;
    virtual void setShowToolTips( bool b );
    bool showToolTips() const;

    enum ResizeMode { NoColumn, AllColumns, LastColumn };
    virtual void setResizeMode( ResizeMode m );
    ResizeMode resizeMode() const;

    QListViewItem * findItem( const QString& text, int column, ComparisonFlags compare = ExactMatch | CaseSensitive ) const;

    enum RenameAction { Accept, Reject };
    virtual void setDefaultRenameAction( RenameAction a );
    RenameAction defaultRenameAction() const;
    bool isRenaming() const;

    void hideColumn( int column );

public slots:
    virtual void clear();
    virtual void invertSelection();
    virtual void selectAll( bool select );
    void triggerUpdate();
    void setContentsPos( int x, int y );
    void adjustColumn( int col );

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 doubleClicked( QListViewItem *, const QPoint&, int );
    void returnPressed( QListViewItem * );
    void spacePressed( 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 contextMenuRequested( QListViewItem *, const QPoint &, int );

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

    void expanded( QListViewItem *item );
    void collapsed( QListViewItem *item );
#ifndef QT_NO_DRAGANDDROP
    void dropped( QDropEvent *e );
#endif
    void itemRenamed( QListViewItem *item, int col, const QString & );
    void itemRenamed( QListViewItem *item, int col  );

protected:
    void contentsMousePressEvent( QMouseEvent * e );
    void contentsMouseReleaseEvent( QMouseEvent * e );
    void contentsMouseMoveEvent( QMouseEvent * e );
    void contentsMouseDoubleClickEvent( QMouseEvent * e );
    void contentsContextMenuEvent( QContextMenuEvent * e );
#ifndef QT_NO_DRAGANDDROP
    void contentsDragEnterEvent( QDragEnterEvent *e );
    void contentsDragMoveEvent( QDragMoveEvent *e );
    void contentsDragLeaveEvent( QDragLeaveEvent *e );
    void contentsDropEvent( QDropEvent *e );
    virtual QDragObject *dragObject();
    virtual void startDrag();
#endif

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

    void keyPressEvent( QKeyEvent *e );

    void resizeEvent( QResizeEvent *e );
    void viewportResizeEvent( 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 styleChange( QStyle& );
    void windowActivationChange( bool );

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

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

private:
    void contentsMousePressEventEx( QMouseEvent * e );
    void contentsMouseReleaseEventEx( QMouseEvent * e );
    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 );
    bool selectRange( QListViewItem *newItem, QListViewItem *oldItem, QListViewItem *anchorItem );
    bool clearRange( QListViewItem *from, QListViewItem *to, bool includeFirst = TRUE );
    void doAutoScroll( const QPoint &cursorPos );

    QListViewPrivate * d;

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


class Q_EXPORT QCheckListItem : public QListViewItem
{
public:
    enum Type { RadioButton,
		CheckBox,
		Controller,
		RadioButtonController=Controller,
		CheckBoxController };
    // ### should be integrated with qbutton in ver4 perhaps
    enum ToggleState { Off, NoChange, On };

    QCheckListItem( QCheckListItem *parent, const QString &text,
		    Type = RadioButtonController );
    QCheckListItem( QCheckListItem *parent, QListViewItem *after,
 		    const QString &text, Type = RadioButtonController );
    QCheckListItem( QListViewItem *parent, const QString &text,
		    Type = RadioButtonController );
    QCheckListItem( QListViewItem *parent, QListViewItem *after,
 		    const QString &text, Type = RadioButtonController );
    QCheckListItem( QListView *parent, const QString &text,
		    Type = RadioButtonController );
    QCheckListItem( QListView *parent, QListViewItem *after,
 		    const QString &text, Type = RadioButtonController );
    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 ); // ### should be replaced by setChecked in ver4
    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 setTristate( bool );
    bool isTristate() const;
    ToggleState state() const;
    void setState( ToggleState s);

    int rtti() const;
    static int RTTI;

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

private:
    void init();
    ToggleState internalState() const;
    void setStoredState( ToggleState newState, void *key );
    ToggleState storedState( void *key ) const;
    void stateChange( ToggleState s );
    void restoreState( void *key, int depth = 0 );
    void updateController( bool update = TRUE , bool store = FALSE );
    void updateStoredState( void *key );
    void setState( ToggleState s, bool update, bool store );
    void setCurrentState( ToggleState s );

    Type myType;
    bool on; // ### remove in ver4
    QCheckListItemPrivate *d;
};

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

public:
    enum IteratorFlag {
	Visible = 		0x00000001,
	Invisible = 		0x00000002,
	Selected =		0x00000004,
	Unselected = 		0x00000008,
	Selectable =		0x00000010,
	NotSelectable =		0x00000020,
	DragEnabled =		0x00000040,
	DragDisabled =		0x00000080,
	DropEnabled =		0x00000100,
	DropDisabled =		0x00000200,
	Expandable =		0x00000400,
	NotExpandable =		0x00000800,
	Checked =		0x00001000,
	NotChecked =		0x00002000
    };

    QListViewItemIterator();
    QListViewItemIterator( QListViewItem *item );
    QListViewItemIterator( QListViewItem *item, int iteratorFlags );

    QListViewItemIterator( const QListViewItemIterator &it );
    QListViewItemIterator( QListView *lv );
    QListViewItemIterator( QListView *lv, int iteratorFlags );

    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* operator*();
    QListViewItem *current() const;

protected:
    QListViewItem *curr;
    QListView *listView;

private:
    QListViewItemIteratorPrivate* d() const;
    void init( int flags );
    void addToListView();
    void currentRemoved();
    bool matchesFlags( const QListViewItem* ) const;
    bool testPair( QListViewItemIterator::IteratorFlag, QListViewItemIterator::IteratorFlag, bool ) const;
    bool isChecked( const QListViewItem* ) const;
};

#endif // QT_NO_LISTVIEW

#endif // QLISTVIEW_H

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