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// 20 may 2015
# include "uipriv_windows.h"
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// we as Common Controls 6 users don't need to worry about the height of comboboxes; see http://blogs.msdn.com/b/oldnewthing/archive/2006/03/10/548537.aspx
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struct uiCombobox {
uiWindowsControl c ;
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HWND hwnd ;
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void ( * onSelected ) ( uiCombobox * , void * ) ;
void * onSelectedData ;
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} ;
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uiWindowsDefineControlWithOnDestroy (
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uiCombobox , // type name
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uiComboboxType , // type function
uiWindowsUnregisterWM_COMMANDHandler ( this - > hwnd ) ; // on destroy
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)
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// note: NOT triggered on entering text
static BOOL onWM_COMMAND ( uiControl * cc , HWND hwnd , WORD code , LRESULT * lResult )
{
uiCombobox * c = uiCombobox ( cc ) ;
if ( code ! = CBN_SELCHANGE )
return FALSE ;
( * ( c - > onSelected ) ) ( c , c - > onSelectedData ) ;
* lResult = 0 ;
return TRUE ;
}
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// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
# define comboboxWidth 107 /* this is actually the shorter progress bar width, but Microsoft only indicates as wide as necessary */
# define comboboxHeight 14
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static void minimumSize ( uiWindowsControl * c , uiWindowsSizing * d , intmax_t * width , intmax_t * height )
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{
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* width = uiWindowsDlgUnitsToX ( comboboxWidth , d - > BaseX ) ;
* height = uiWindowsDlgUnitsToY ( comboboxHeight , d - > BaseY ) ;
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}
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static void defaultOnSelected ( uiCombobox * c , void * data )
{
// do nothing
}
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void uiComboboxAppend ( uiCombobox * c , const char * text )
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{
WCHAR * wtext ;
LRESULT res ;
wtext = toUTF16 ( text ) ;
res = SendMessageW ( c - > hwnd , CB_ADDSTRING , 0 , ( LPARAM ) wtext ) ;
if ( res = = ( LRESULT ) CB_ERR )
logLastError ( " error appending item to uiCombobox " ) ;
else if ( res = = ( LRESULT ) CB_ERRSPACE )
logLastError ( " memory exhausted appending item to uiCombobox " ) ;
uiFree ( wtext ) ;
}
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intmax_t uiComboboxSelected ( uiCombobox * c )
{
LRESULT n ;
n = SendMessage ( c - > hwnd , CB_GETCURSEL , 0 , 0 ) ;
if ( n = = ( LRESULT ) CB_ERR )
return - 1 ;
return ( intmax_t ) n ;
}
void uiComboboxOnSelected ( uiCombobox * c , void ( * f ) ( uiCombobox * c , void * data ) , void * data )
{
c - > onSelected = f ;
c - > onSelectedData = data ;
}
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static uiCombobox * finishNewCombobox ( DWORD style )
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{
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uiCombobox * c ;
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c = ( uiCombobox * ) uiNewControl ( uiComboboxType ( ) ) ;
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c - > hwnd = uiWindowsEnsureCreateControlHWND ( WS_EX_CLIENTEDGE ,
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L " combobox " , L " " ,
style | WS_TABSTOP ,
hInstance , NULL ,
TRUE ) ;
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uiWindowsRegisterWM_COMMANDHandler ( c - > hwnd , onWM_COMMAND , uiControl ( c ) ) ;
uiComboboxOnSelected ( c , defaultOnSelected , NULL ) ;
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uiWindowsFinishNewControl ( c , uiCombobox ) ;
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return c ;
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}
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uiCombobox * uiNewCombobox ( void )
{
return finishNewCombobox ( CBS_DROPDOWNLIST ) ;
}
uiCombobox * uiNewEditableCombobox ( void )
{
return finishNewCombobox ( CBS_DROPDOWN ) ;
}