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/**********************************************************************//** Microsoft Windows/NT **//** Copyright(c) Microsoft Corp., 1991 **//**********************************************************************/
/*
bltlc.hxx BLT list control classes: definitions
FILE HISTORY: RustanL 20-Nov-1990 Created RustanL 22-Feb-1991 Modified LC hierarchy RustanL 21-Mar-1991 Folded in code review changes from CR on 20-Mar-1991 attended by JimH, GregJ, Hui-LiCh, RustanL. beng 14-May-1991 Clients depend on blt.hxx terryk 25-Jul-1991 Add SetItemData, QuerySelCount and QuerySelItems to LIST_CONTROL class Add ChangeSel, SetTopIndex beng 21-Aug-1991 Removed LC_NEW_SEARCH and LC_CURRENT_ITEM beng 22-Sep-1991 Exiled device combos to devcb.hxx terryk 22-Mar-1992 Added Insert Item
*/
#ifndef _BLT_HXX_
#error "Don't include this file directly; instead, include it through blt.hxx"
#endif // _BLT_HXX_
#ifndef _BLTLC_HXX_
#define _BLTLC_HXX_
#include "string.hxx"
/*************************************************************************
NAME: LIST_CONTROL
SYNOPSIS: base class for BLT list controls (combos and listboxes)
INTERFACE: LIST_CONTROL() constructor
QueryCount() returns the number of items AddItemData() add the data item to the listbox SetItemData() set the item data. InsertItemData() insert the data item in the listbox SelectItem() selects an item SelectItems() selects several items RemoveSelection() deselects all selected items DeleteItem() deletes an item DeleteAllItems() deletes all items (empties the list control) QueryCurrentItem() returns the index of the first currently selected item QuerySelCount() returns the number of selected items in the list control QuerySelItems() return an array of selected items indices QueryItemHeight() calculate the height of any item in the listbox. Use default parameter if this is a fixed-height listbox. IsItemSelected() returns whether the given item is selected SetTopIndex() set the top visible item index QueryTopIndex() returns the index of the topmost visible SetCaretIndex() set the caret index QueryCaretIndex() returns the caret index
PARENT: CONTROL_WINDOW
CAVEATS: QueryCurrentItem was designed for single-selection lists. Under multiple-select, it returns the first selected item.
Clients should never pass the list control a negative number as an index.
Saving selection is not implemented for multiple-select.
Set/QueryTopIndex only works on listboxes. (sloppy design)
NOTES: Although the intersection of functionality of the Windows combobox and listbox is quite large, there are differences between the actual messages sent to each. To hide this ugly artifact, BLT keeps track of whether the list control is a combo or a listbox. Then, the methods in this hierarchy can choose messages based on this information.
CODEWORK - factor out listbox-only function into subclass.
If the listbox is multi-select, we attempt to save the entire selection in _piSavedMultSel. In this case, _iSavedSelection is used as the count of items in _piSavedMultSel, instead of as an item index. If this pointer is NULL, then SaveValue could not allocate enough memory, and the selection is lost.
HISTORY: RustanL 20-Nov-1990 Created RustanL 22-Feb-1991 Modified LC hierarchy RustanL 21-Mar-1991 Folded in code review changes from CR on 20-Mar-1991 attended by JimH, GregJ, Hui-LiCh, RustanL. beng 16-May-1991 Added app-window constructor terryk 25-Jul-1991 Add the following: SetItemData() QuerySelCount() QuerySelItems() SetTopIndex() ChangeSel() beng 31-Jul-1991 Renamed QMessageInfo to QEventEffects rustanl 12-Aug-1991 Added IsMultSel rustanl 13-Aug-1991 Extended several methods to work with both single and multiple select list controls. Removed ChangeSel and instead added a parameter to SelectItem. beng 22-Aug-1991 Added QueryTopIndex beng 04-Oct-1991 Win32 conversion kevinl 23-Oct-1991 Added InsertItemData jonn 09-Sep-1993 Moved fns from SET_CONTROL_LISTBOX to LISTBOX jonn 15-Sep-1993 Added GetCaretIndex and SetCaretIndex
**************************************************************************/
DLL_CLASS LIST_CONTROL : public CONTROL_WINDOW{private: BOOL _fCombo; // is list control a combobox?
INT _iSavedSelection; // saves selection for magic groups.
INT * _piSavedMultSel; // saves selection for multiselect listbox
// in this case, _iSavedSelection is a count
// if NULL, selection was not successfully saved
protected: LIST_CONTROL( OWNER_WINDOW * powin, CID cid, BOOL fCombo ); LIST_CONTROL( OWNER_WINDOW * powin, CID cid, BOOL fCombo, XYPOINT xy, XYDIMENSION dxy, ULONG flStyle, const TCHAR * pszClassName ); ~LIST_CONTROL();
INT AddItemData( VOID * pv ); INT SetItemData( INT iIndex, VOID * pv ); INT InsertItemData( INT i, VOID *pv );
/* Replacement of CONTROL_VALUE virtuals
*/ virtual VOID SaveValue( BOOL fInvisible = TRUE ); virtual VOID RestoreValue( BOOL fInvisible = TRUE );
virtual UINT QueryEventEffects( const CONTROL_EVENT & e );
public: INT QueryCount() const;
VOID SelectItem( INT i, BOOL fSelect = TRUE ); VOID SelectItems( INT * pi, INT c, BOOL fSelect = TRUE ); VOID RemoveSelection();
INT DeleteItem( INT i ); VOID DeleteAllItems();
INT QueryCurrentItem() const;
INT QuerySelCount() const; APIERR QuerySelItems( INT * piSel, INT ciMax ) const;
UINT QueryItemHeight( UINT ilb = 0) const; BOOL IsItemSelected( UINT ilb ) const;
VOID SetTopIndex( INT i ); INT QueryTopIndex() const;
VOID SetCaretIndex( INT i, BOOL fPartiallyVisibleOK = FALSE ); INT QueryCaretIndex() const;
BOOL IsCombo() const { return _fCombo; } BOOL IsMultSel() const;};
/*************************************************************************
NAME: STRING_LIST_CONTROL
SYNOPSIS: class containing common denominators of the combobox and the plain vanilla Windows listbox
INTERFACE: AddItem() adds an item (a string, in fact) AddItemIdemp() idempotently adds an item (a string) InsertItem() Insert string item in the specified location FindItem() finds the item which has the given prefix, and returns its index FindItemExact() finds the item which exactly matches the given string QueryItemText() fetches the text of an item QueryItemLength() returns the string length of a particular item QueryItemSize() return the number of bytes needed to dup an item
PARENT: LIST_CONTROL
HISTORY: RustanL 22-Feb-1991 Created as a result of modifying the LIST_CONTROL hierarchy RustanL 21-Mar-1991 Folded in code review changes from CR on 20-Mar-1991 attended by JimH, GregJ, Hui-LiCh, RustanL. beng 16-May-1991 Added app-window constructor beng 10-Jun-1991 Added QueryItemSize; changed return of QueryItemText beng 21-Aug-1991 Removed LC_CURRENT_ITEM magic value**************************************************************************/
DLL_CLASS STRING_LIST_CONTROL : public LIST_CONTROL{private: APIERR QueryItemTextAux( TCHAR * pchBuffer, INT i ) const;
protected: STRING_LIST_CONTROL( OWNER_WINDOW * powin, CID cid, BOOL fCombo ); STRING_LIST_CONTROL( OWNER_WINDOW * powin, CID cid, BOOL fCombo, XYPOINT xy, XYDIMENSION dxy, ULONG flStyle, const TCHAR * pszClassName );
public: INT AddItem( const TCHAR * pch ); INT AddItem( const NLS_STR & nls ) { return AddItem( nls.QueryPch()); }
INT AddItemIdemp( const TCHAR * pch ); INT AddItemIdemp( const NLS_STR & nls ) { return AddItemIdemp( nls.QueryPch()); }
INT InsertItem( INT i, const TCHAR * pch ); INT InsertItem( INT i, const NLS_STR & nls ) { return InsertItem( i, nls.QueryPch() ); }
INT FindItem( const TCHAR * pchPrefix ) const; INT FindItem( const TCHAR * pchPrefix, INT iLastSearchResult ) const; INT FindItem( const NLS_STR & nlsPrefix ) const { return FindItem( nlsPrefix.QueryPch() ); } INT FindItem( const NLS_STR & nlsPrefix, INT iLastSearchResult ) const { return FindItem( nlsPrefix.QueryPch(), iLastSearchResult ); }
INT FindItemExact( const TCHAR * pch ) const; INT FindItemExact( const TCHAR * pch, INT iLastSearchResult ) const; INT FindItemExact( const NLS_STR & nls ) const { return FindItemExact( nls.QueryPch() ); } INT FindItemExact( const NLS_STR & nls, INT iLastSearchResult ) const { return FindItemExact( nls.QueryPch(), iLastSearchResult ); }
APIERR QueryItemText( NLS_STR * pnls, INT i ) const; APIERR QueryItemText( NLS_STR * pnls ) const { return QueryItemText(pnls, QueryCurrentItem()); }
APIERR QueryItemText( TCHAR * pchBuffer, INT cbBuffer, INT i ) const; APIERR QueryItemText( TCHAR * pchBuffer, INT cbBuffer ) const { return QueryItemText(pchBuffer, cbBuffer, QueryCurrentItem()); }
INT QueryItemLength( INT i ) const; INT QueryItemLength() const { return QueryItemLength(QueryCurrentItem()); }
INT QueryItemSize( INT i ) const; INT QueryItemSize() const { return QueryItemSize(QueryCurrentItem()); }};
/*************************************************************************
NAME: STRING_LISTBOX
SYNOPSIS: class representing the plain vanilla Windows listbox (whose items consist of strings fitting in one column)
INTERFACE: STRING_LISTBOX() constructor
PARENT: STRING_LIST_CONTROL
HISTORY: RustanL 22-Feb-1991 Created as a result of modifying the LIST_CONTROL hierarchy beng 16-May-1991 Added app-window constructor DavidHov 21-Jan-1992 Added FONT member**************************************************************************/
DLL_CLASS STRING_LISTBOX : public STRING_LIST_CONTROL{ FONT _fontListBox ;
public: STRING_LISTBOX( OWNER_WINDOW * powin, CID cid, enum FontType font = FONT_DEFAULT ); STRING_LISTBOX( OWNER_WINDOW * powin, CID cid, XYPOINT xy, XYDIMENSION dxy, ULONG flStyle, const TCHAR * pszClassName = CW_CLASS_LISTBOX, enum FontType font = FONT_DEFAULT );};
/*************************************************************************
NAME: COMBOBOX
SYNOPSIS: combo box class
INTERFACE: COMBOBOX() constructor SetMaxLength() sets the limit on the number of bytes that a string typed in the combo's edit field may have (strlen)
PARENT: STRING_LIST_CONTROL
CAVEATS: SetMaxLength should only be called on combos which contain an SLE. Likewise, the cbMaxLen parameter to the constructor should always be 0 for combos which don't have an SLE.
HISTORY: RustanL 22-Feb-1991 Created as a result of modifying the LIST_CONTROL hierarchy beng 16-May-1991 Added app-window constructor beng 31-Jul-1991 Renamed QMessageInfo to QEventEffects beng 04-Oct-1991 Win32 conversion kevinl 19-Nov-1991 Added SelectString
**************************************************************************/
DLL_CLASS COMBOBOX : public STRING_LIST_CONTROL{private: NLS_STR _nlsSaveValue;
protected: /* See CONTROL_VALUE for more info on the following methods.
*/ virtual UINT QueryEventEffects( const CONTROL_EVENT & e );
/* Replacement of CONTROL_VALUE virtuals
*/ virtual VOID SaveValue( BOOL fInvisible = TRUE ); virtual VOID RestoreValue( BOOL fInvisible = TRUE );
public: COMBOBOX( OWNER_WINDOW * powin, CID cid, UINT cbMaxLen = 0 ); COMBOBOX( OWNER_WINDOW * powin, CID cid, UINT cbMaxLen, XYPOINT xy, XYDIMENSION dxy, ULONG flStyle, const TCHAR * pszClassName = CW_CLASS_COMBOBOX );
BOOL SetMaxLength( UINT cbMaxLen );
BOOL IsDropDownList() const; BOOL IsSimple() const; BOOL IsDropDown() const; BOOL IsUserEdittable() const { return IsSimple() || IsDropDown(); }
VOID SelectString();
};
#endif // _BLTLC_HXX_ - end of file
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