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# ntqlayout.h

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

    /****************************************************************************
    ** $Id: qt/ntqlayout.h   3.3.8   edited Jan 11 14:38 $
    **
    ** Definition of layout classes
    **
    ** Created : 960416
    **
    ** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
    **
    ** This file is part of the kernel module of the TQt GUI Toolkit.
    **
    ** This file may be used under the terms of the GNU General Public
    ** License versions 2.0 or 3.0 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file. Alternatively you may (at your option) use any
    ** later version of the GNU General Public License if such license has
    ** been publicly approved by Trolltech ASA (or its successors, if any)
    ** and the KDE Free TQt Foundation.
    **
    ** Please review the following information to ensure GNU General
    ** Public Licensing requirements will be met:
    ** http://trolltech.com/products/qt/licenses/licensing/opensource/.
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
    ** or contact the sales department at sales@trolltech.com.
    **
    ** This file may be used under the terms of the Q Public License as
    ** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
    ** included in the packaging of this file.  Licensees holding valid TQt
    ** Commercial licenses may use this file in accordance with the TQt
    ** Commercial License Agreement provided with the Software.
    **
    ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
    ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
    ** herein.
    **
    **********************************************************************/

    #ifndef TQLAYOUT_H
    #define TQLAYOUT_H

    #ifndef QT_H
    #include "ntqobject.h"
    #include "ntqsizepolicy.h"
    #include "ntqwidget.h"
    #endif // QT_H

    #include <limits.h>

    #ifndef QT_NO_LAYOUT

    #if 0
    TQ_OBJECT
    #endif

    static const int TQLAYOUTSIZE_MAX = INT_MAX/256/16;

    class TQGridLayoutBox;
    class TQGridLayoutData;
    class TQLayout;
    class TQLayoutItem;
    struct TQLayoutData;
    class TQMenuBar;
    class TQSpacerItem;
    class TQWidget;

    class Q_EXPORT TQGLayoutIterator : public TQShared
    {
    public:
        virtual ~TQGLayoutIterator();
        virtual TQLayoutItem *next() = 0;
        virtual TQLayoutItem *current() = 0;
        virtual TQLayoutItem *takeCurrent() = 0;
    };

    class Q_EXPORT TQLayoutIterator
    {
    public:
        TQLayoutIterator( TQGLayoutIterator *i ) : it( i ) { }
        TQLayoutIterator( const TQLayoutIterator &i ) : it( i.it ) {
    	if ( it )
    	    it->ref();
        }
        ~TQLayoutIterator() { if ( it && it->deref() ) delete it; }
        TQLayoutIterator &operator=( const TQLayoutIterator &i ) {
    	if ( i.it )
    	    i.it->ref();
    	if ( it && it->deref() )
    	    delete it;
    	it = i.it;
    	return *this;
        }
        TQLayoutItem *operator++() { return it ? it->next() : 0; }
        TQLayoutItem *current() { return it ? it->current() : 0; }
        TQLayoutItem *takeCurrent() { return it ? it->takeCurrent() : 0; }
        void deleteCurrent();

    private:
        TQGLayoutIterator *it;
    };

    class Q_EXPORT TQLayoutItem
    {
    public:
        TQLayoutItem( int alignment = 0 ) : align( alignment ) { }
        virtual ~TQLayoutItem();
        virtual TQSize sizeHint() const = 0;
        virtual TQSize minimumSize() const = 0;
        virtual TQSize maximumSize() const = 0;
        virtual TQSizePolicy::ExpandData expanding() const = 0;
        virtual void setGeometry( const TQRect& ) = 0;
        virtual TQRect geometry() const = 0;
        virtual bool isEmpty() const = 0;
        virtual bool hasHeightForWidth() const;
        virtual int heightForWidth( int ) const;
        // ### add minimumHeightForWidth( int ) in TQt 4.0
        virtual void invalidate();

        virtual TQWidget *widget();
        virtual TQLayoutIterator iterator();
        virtual TQLayout *layout();
        virtual TQSpacerItem *spacerItem();

        int alignment() const { return align; }
        virtual void setAlignment( int a );

    protected:
        int align;
    };

    class Q_EXPORT TQSpacerItem : public TQLayoutItem
    {
    public:
        TQSpacerItem( int w, int h,
    		 TQSizePolicy::SizeType hData = TQSizePolicy::Minimum,
    		 TQSizePolicy::SizeType vData = TQSizePolicy::Minimum )
    	: width( w ), height( h ), sizeP( hData, vData ) { }
        void changeSize( int w, int h,
    		     TQSizePolicy::SizeType hData = TQSizePolicy::Minimum,
    		     TQSizePolicy::SizeType vData = TQSizePolicy::Minimum );
        TQSize sizeHint() const;
        TQSize minimumSize() const;
        TQSize maximumSize() const;
        TQSizePolicy::ExpandData expanding() const;
        bool isEmpty() const;
        void setGeometry( const TQRect& );
        TQRect geometry() const;
        TQSpacerItem *spacerItem();

    private:
        int width;
        int height;
        TQSizePolicy sizeP;
        TQRect rect;
    };

    class Q_EXPORT TQWidgetItem : public TQLayoutItem
    {
    public:
        TQWidgetItem( TQWidget *w ) : wid( w ) { }
        TQSize sizeHint() const;
        TQSize minimumSize() const;
        TQSize maximumSize() const;
        TQSizePolicy::ExpandData expanding() const;
        bool isEmpty() const;
        void setGeometry( const TQRect& );
        TQRect geometry() const;
        virtual TQWidget *widget();

        bool hasHeightForWidth() const;
        int heightForWidth( int ) const;

    private:
        TQWidget *wid;
    };

    class Q_EXPORT TQLayout : public TQObject, public TQLayoutItem
    {
        TQ_OBJECT
        TQ_ENUMS( ResizeMode )
        TQ_PROPERTY( int margin READ margin WRITE setMargin )
        TQ_PROPERTY( int spacing READ spacing WRITE setSpacing )
        TQ_PROPERTY( ResizeMode resizeMode READ resizeMode WRITE setResizeMode )

    public:
        // ### TQt 4.0: put 'Auto' first in enum
        enum ResizeMode { FreeResize, Minimum, Fixed, Auto };

        TQLayout( TQWidget *parent, int margin = 0, int spacing = -1,
    	     const char *name = 0 );
        TQLayout( TQLayout *parentLayout, int spacing = -1, const char *name = 0 );
        TQLayout( int spacing = -1, const char *name = 0 );
        ~TQLayout();

        int margin() const { return outsideBorder; }
        int spacing() const { return insideSpacing; }

        virtual void setMargin( int );
        virtual void setSpacing( int );

        int defaultBorder() const { return insideSpacing; }
        void freeze( int w, int h );
        void freeze() { setResizeMode( Fixed ); }

        void setResizeMode( ResizeMode );
        ResizeMode resizeMode() const;

    #ifndef QT_NO_MENUBAR
        virtual void setMenuBar( TQMenuBar *w );
        TQMenuBar *menuBar() const { return menubar; }
    #endif

        TQWidget *mainWidget();
        bool isTopLevel() const { return topLevel; }

        virtual void setAutoAdd( bool );
        bool autoAdd() const { return autoNewChild; }

        void invalidate();
        TQRect geometry() const;
        bool activate();

        void add( TQWidget *w ) { addItem( new TQWidgetItem(w) ); }
        virtual void addItem( TQLayoutItem * ) = 0;

        void remove( TQWidget *w );
        void removeItem( TQLayoutItem * );

        TQSizePolicy::ExpandData expanding() const;
        TQSize minimumSize() const;
        TQSize maximumSize() const;
        void setGeometry( const TQRect& ) = 0;
        TQLayoutIterator iterator() = 0;
        bool isEmpty() const;

        int totalHeightForWidth( int w ) const;
        TQSize totalMinimumSize() const;
        TQSize totalMaximumSize() const;
        TQSize totalSizeHint() const;
        TQLayout *layout();

        bool supportsMargin() const { return marginImpl; }

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

    protected:
        bool eventFilter( TQObject *, TQEvent * );
        void childEvent( TQChildEvent *e );
        void addChildLayout( TQLayout *l );
        void deleteAllItems();

        void setSupportsMargin( bool );
        TQRect alignmentRect( const TQRect& ) const;

    private:
        void setWidgetLayout( TQWidget *, TQLayout * );
        void init();
        int insideSpacing;
        int outsideBorder;
        uint topLevel : 1;
        uint enabled : 1;
        uint autoNewChild : 1;
        uint frozen : 1;
        uint activated : 1;
        uint marginImpl : 1;
        uint autoMinimum : 1;
        uint autoResizeMode : 1;
        TQRect rect;
        TQLayoutData *extraData;
    #ifndef QT_NO_MENUBAR
        TQMenuBar *menubar;
    #endif

    private:
    #if defined(TQ_DISABLE_COPY)
        TQLayout( const TQLayout & );
        TQLayout &operator=( const TQLayout & );
    #endif

        static void propagateSpacing( TQLayout *layout );
    };

    inline void TQLayoutIterator::deleteCurrent()
    {
        delete takeCurrent();
    }

    class Q_EXPORT TQGridLayout : public TQLayout
    {
        TQ_OBJECT
    public:
        TQGridLayout( TQWidget *parent, int nRows = 1, int nCols = 1, int border = 0,
    		 int spacing = -1, const char *name = 0 );
        TQGridLayout( int nRows = 1, int nCols = 1, int spacing = -1,
    		 const char *name = 0 );
        TQGridLayout( TQLayout *parentLayout, int nRows = 1, int nCols = 1,
    		 int spacing = -1, const char *name = 0 );
        ~TQGridLayout();

        TQSize sizeHint() const;
        TQSize minimumSize() const;
        TQSize maximumSize() const;

        // ### remove 'virtual' in 4.0 (or add 'virtual' to set{Row,Col}Spacing())
        virtual void setRowStretch( int row, int stretch );
        virtual void setColStretch( int col, int stretch );
        int rowStretch( int row ) const;
        int colStretch( int col ) const;

        void setRowSpacing( int row, int minSize );
        void setColSpacing( int col, int minSize );
        int rowSpacing( int row ) const;
        int colSpacing( int col ) const;

        int numRows() const;
        int numCols() const;
        TQRect cellGeometry( int row, int col ) const;

        bool hasHeightForWidth() const;
        int heightForWidth( int ) const;
        int minimumHeightForWidth( int ) const;

        TQSizePolicy::ExpandData expanding() const;
        void invalidate();

        void addItem( TQLayoutItem * );
        void addItem( TQLayoutItem *item, int row, int col );
        void addMultiCell( TQLayoutItem *, int fromRow, int toRow,
    			       int fromCol, int toCol, int align = 0 );

        void addWidget( TQWidget *, int row, int col, int align = 0 );
        void addMultiCellWidget( TQWidget *, int fromRow, int toRow,
    			     int fromCol, int toCol, int align = 0 );
        void addLayout( TQLayout *layout, int row, int col);
        void addMultiCellLayout( TQLayout *layout, int fromRow, int toRow,
    			     int fromCol, int toCol, int align = 0 );
        void addRowSpacing( int row, int minsize );
        void addColSpacing( int col, int minsize );

        void expand( int rows, int cols );

        enum Corner { TopLeft, TopRight, BottomLeft, BottomRight };
        void setOrigin( Corner );
        Corner origin() const;
        TQLayoutIterator iterator();
        void setGeometry( const TQRect& );

    protected:
        bool findWidget( TQWidget* w, int *r, int *c );
        void add( TQLayoutItem*, int row, int col );

    private:
    #if defined(TQ_DISABLE_COPY)
        TQGridLayout( const TQGridLayout & );
        TQGridLayout &operator=( const TQGridLayout & );
    #endif

        void init( int rows, int cols );
        TQGridLayoutData *data;
    };

    class TQBoxLayoutData;
    class TQDockWindow;

    class Q_EXPORT TQBoxLayout : public TQLayout
    {
        TQ_OBJECT
    public:
        enum Direction { LeftToRight, RightToLeft, TopToBottom, BottomToTop,
    		     Down = TopToBottom, Up = BottomToTop };

        TQBoxLayout( TQWidget *parent, Direction, int border = 0, int spacing = -1,
    		const char *name = 0 );
        TQBoxLayout( TQLayout *parentLayout, Direction, int spacing = -1,
    		const char *name = 0 );
        TQBoxLayout( Direction, int spacing = -1, const char *name = 0 );
        ~TQBoxLayout();

        void addItem( TQLayoutItem * );

        Direction direction() const { return dir; }
        void setDirection( Direction );

        void addSpacing( int size );
        void addStretch( int stretch = 0 );
        void addWidget( TQWidget *, int stretch = 0, int alignment = 0 );
        void addLayout( TQLayout *layout, int stretch = 0 );
        void addStrut( int );

        void insertSpacing( int index, int size );
        void insertStretch( int index, int stretch = 0 );
        void insertWidget( int index, TQWidget *widget, int stretch = 0,
    		       int alignment = 0 );
        void insertLayout( int index, TQLayout *layout, int stretch = 0 );

        bool setStretchFactor( TQWidget*, int stretch );
        bool setStretchFactor( TQLayout *l, int stretch );

        TQSize sizeHint() const;
        TQSize minimumSize() const;
        TQSize maximumSize() const;

        bool hasHeightForWidth() const;
        int heightForWidth( int ) const;
        int minimumHeightForWidth( int ) const;

        TQSizePolicy::ExpandData expanding() const;
        void invalidate();
        TQLayoutIterator iterator();
        void setGeometry( const TQRect& );

        int findWidget( TQWidget* w );

    protected:
        void insertItem( int index, TQLayoutItem * );

    private:
        friend class TQDockWindow;
    #if defined(TQ_DISABLE_COPY)
        TQBoxLayout( const TQBoxLayout & );
        TQBoxLayout &operator=( const TQBoxLayout & );
    #endif

        void setupGeom();
        void calcHfw( int );
        TQBoxLayoutData *data;
        Direction dir;
        TQBoxLayout *createTmpCopy();
    };

    class Q_EXPORT TQHBoxLayout : public TQBoxLayout
    {
        TQ_OBJECT
    public:
        TQHBoxLayout( TQWidget *parent, int border = 0,
    		 int spacing = -1, const char *name = 0 );
        TQHBoxLayout( TQLayout *parentLayout,
    		 int spacing = -1, const char *name = 0 );
        TQHBoxLayout( int spacing = -1, const char *name = 0 );

        ~TQHBoxLayout();

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

    class Q_EXPORT TQVBoxLayout : public TQBoxLayout
    {
        TQ_OBJECT
    public:
        TQVBoxLayout( TQWidget *parent, int border = 0,
    		 int spacing = -1, const char *name = 0 );
        TQVBoxLayout( TQLayout *parentLayout,
    		 int spacing = -1, const char *name = 0 );
        TQVBoxLayout( int spacing = -1, const char *name = 0 );

        ~TQVBoxLayout();

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

    #endif // QT_NO_LAYOUT
    #endif // TQLAYOUT_H