237 lines
7 KiB
C++
237 lines
7 KiB
C++
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/**********************************************************************/
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/** Microsoft Windows/NT **/
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/** Copyright(c) Microsoft Corp., 1991 **/
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/**********************************************************************/
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/*
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BLTLBST.HXX: BLT "State Listbox"
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Classes in support of a "state listbox". That is, one in which
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each item is prefaced by a bitmap indicating whether it is
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"active" or "inactive". Thus, each item in the list box
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is equivalent to a (possibly multi-state) checkbox.
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The listbox is implemented as a control group to allow
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automatic handling of double clicks and the space character.
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See class headers for more details.
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FILE HISTORY:
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DavidHov 1/8/92 Created
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*/
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#ifndef _BLTLBST_HXX_
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// Forward declarations
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DLL_CLASS STATELBGRP ; // State list box control group
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DLL_CLASS STATELB ; // State list box
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DLL_CLASS STLBITEM ; // State list box item
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const int STLBCOLUMNS = 2 ; // Default number of columns in STATELB
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const int STLBMAXCOLS = 6 ; // Maximum number of columns in STATELB
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/*************************************************************************
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NAME: STLBITEM
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SYNOPSIS: Abstract class for state-oriented BLT list box item.
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INTERFACE: Subclass.
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PARENT: LBI
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USES: none
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CAVEATS: The SetState() member function uses the "modulus" operator
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to guarantee that the value is in the range of 0 to
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(number of bitmaps) - 1.
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NOTES: This is an abstract class. Subclasses must define
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the QueryDisplayString() member.
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HISTORY:
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DavidHov 1/8/92 Created
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beng 21-Apr-1992 Change in LBI::Paint interface
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**************************************************************************/
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DLL_CLASS STLBITEM : public LBI
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{
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protected:
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STATELB * _pstlb ;
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INT _iState ;
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virtual VOID Paint ( LISTBOX * plb,
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HDC hdc,
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const RECT * prect,
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GUILTT_INFO * pGUILTT ) const ;
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virtual WCHAR QueryLeadingChar () const;
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virtual INT Compare ( const LBI * plbi ) const ;
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public:
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STLBITEM ( STATELBGRP * pstgGroup ) ;
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~STLBITEM () ;
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// Provide the string version of this LBI.
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virtual const TCHAR * QueryDisplayString () const = 0 ;
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// Query & Set methods for the state of the item. They return
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// the current or previous state of the item.
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INT QueryState () const
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{ return _iState ; }
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INT SetState ( INT iState ) ;
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INT NextState ()
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{ return SetState( QueryState() + 1 ) ; }
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};
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/*************************************************************************
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NAME: STATELB
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SYNOPSIS: State-oriented BLT list box.
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Do not use this class directly! (See 'INTERFACE' notes
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below; use STATELBGRP instead.)
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Instances of this class are list boxes which contain
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items composed of two columns: a bitmap indicating
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the item's state, and a string describing the item.
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They are LBI's of class STLBITEM.
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A double click on an item (or keyed space) results
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in a change of state to the "next" state (0,1,2...)
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and the display is changed to the "state'th" bit map.
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All settings of state "wrap" back to the beginning when
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the limit of the bitmap table has been reached.
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INTERFACE: Do not instantiate or subclass: this class is used
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by STATELBGRP, so create instances of class STATELBGRP
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and use them as equivalent to BLT_LISTBOX controls.
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PARENT: BLT_LISTBOX
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USES:
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CAVEATS:
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NOTES:
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HISTORY:
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DavidHov 1/10/92 Created
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**************************************************************************/
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DLL_CLASS STATELB : public BLT_LISTBOX
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{
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private:
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INT _cMaps ;
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DISPLAY_MAP * * _ppdmMaps ;
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UINT _adxColumns [ STLBMAXCOLS ] ;
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protected:
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INT CD_Char ( WCHAR wch , USHORT nLastPos ) ;
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INT CD_VKey ( USHORT nVKey, USHORT nLastPos ) ;
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public:
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STATELB ( INT aiMapIds [], // Table of BM resource IDs
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OWNER_WINDOW * powin, // Owner window
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CID cid, // Control ID
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INT cCols = STLBCOLUMNS, // Number of columns
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BOOL fReadOnly = FALSE, // Read-only control
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enum FontType font = FONT_DEFAULT ) ;
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~ STATELB () ;
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DISPLAY_MAP * const * QueryMapArray () const
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{ return _ppdmMaps; }
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INT QueryMapCount () const
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{ return _cMaps ; }
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const UINT * QueryColData ()
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{ return _adxColumns ; }
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DECLARE_LB_QUERY_ITEM( STLBITEM )
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};
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/*************************************************************************
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NAME: STATELBGRP
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SYNOPSIS: State list box control group.
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This is really the equivalent of a single control, since
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it consitutes a "wrapper" for the internal listbox.
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Its purpose is to support the state behavior associated
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with the double-click or space key.
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Use QueryLb() to access the listbox and its methods.
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The graphical form of the listbox has two columns:
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an icon representing the state and a text string
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(see STLBITEM::QueryDisplayString()). The icon column
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steps through the array of bit maps given during
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construction; double-clicks and space characters
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cause the icon to change.
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The most common use for this control/group will probably
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be to create a "list of checkboxes", which requires
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two icons: "on" and "off".
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INTERFACE: Subclass.
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PARENT: CONTROL_GROUP
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USES: STATELB
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CAVEATS: The internal listbox must have a static control
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associated with it for calculation of the column
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boundaries. See BLTLB.HXX, etc., for details.
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NOTES:
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HISTORY:
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DavidHov 1/9/92 Created
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**************************************************************************/
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DLL_CLASS STATELBGRP : public CONTROL_GROUP
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{
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private:
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STATELB * _pstlb ;
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protected:
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APIERR OnUserAction
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( CONTROL_WINDOW * pcw, const CONTROL_EVENT & cEvent ) ;
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public:
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// Constructor which creates its listbox automatically.
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STATELBGRP ( INT aiMapIds [],
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OWNER_WINDOW * powin,
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CID cid,
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INT cCols = STLBCOLUMNS,
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BOOL fReadOnly = FALSE,
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enum FontType font = FONT_DEFAULT ) ;
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// Constructor which accepts an existing listbox.
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STATELBGRP ( STATELB * pstlb ) ;
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~ STATELBGRP () ;
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STATELB * QueryLb ()
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{ return _pstlb ; }
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};
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#endif // _BLTLBST_HXX_
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