AppearanceSample-1/RadioGroup.cp

/*
    File:       RadioGroup.cp
 
    Contains:   Class to implement a radio group.
 
    Version:    Appearance 1.0 SDK
 
    Copyright:  © 1997 by Apple Computer, Inc., all rights reserved.
 
    File Ownership:
 
        DRI:                Edward Voas
 
        Other Contact:      7 of 9, Borg Collective
 
        Technology:         OS Technologies Group
 
    Writers:
 
        (edv)   Ed Voas
 
    Change History (most recent first):
 
         <1>     9/11/97    edv     First checked in.
*/
 
#include "AppearanceSamplePrefix.h"
 
#if !BUILDING_FOR_CARBON_8
    #include <HIToolbox/ControlDefinitions.h>
#else
    #include <ControlDefinitions.h>
#endif
 
#include "RadioGroup.h"
 
typedef struct
{
    ControlRef      control;
    SInt16          value;
} RadioEntry;
 
RadioGroup::RadioGroup()
{
    fInfo = NewHandle( 0 );
    fValue = 0;
    fMixed = false;
}
 
RadioGroup::~RadioGroup()
{
    DisposeHandle( fInfo );
}
        
void
RadioGroup::AddControl( ControlRef control, SInt16 value )
{
    Size        size;
    SInt16      numItems;
    
    size = GetHandleSize( fInfo );
    numItems = size / sizeof( RadioEntry );
    
    SetHandleSize( fInfo, size + sizeof( RadioEntry ) );
    
    ((RadioEntry*)*fInfo)[ numItems ].value = value;
    ((RadioEntry*)*fInfo)[ numItems ].control = control;
    
    SetValue( value ); 
}
 
SInt16
RadioGroup::GetValue()
{
    return fValue;
}
 
void
RadioGroup::SetValue( SInt16 value )
{
    SInt16      numItems;
    SInt16      i;
    ControlRef  oldControl = nil, newControl = nil;
    
    if ( fMixed )
    {
        numItems = GetHandleSize( fInfo ) / sizeof( RadioEntry );
        
        for ( i = 0; i < numItems; i++ )
        {
            if ( GetControlValue( ((RadioEntry*)*fInfo)[ i ].control ) )
            {
                SetControlValue( ((RadioEntry*)*fInfo)[ i ].control, 0 );
            }
        }
    }
    
    if ( (value != fValue) || fMixed )
    {
        numItems = GetHandleSize( fInfo ) / sizeof( RadioEntry );
        
        for ( i = 0; i < numItems; i++ )
        {
            if ( ((RadioEntry*)*fInfo)[ i ].value == value )
                newControl = ((RadioEntry*)*fInfo)[ i ].control;
            
            if ( ((RadioEntry*)*fInfo)[ i ].value == fValue )
                oldControl = ((RadioEntry*)*fInfo)[ i ].control;
        }
        if ( newControl )
        {
            if ( oldControl )
                SetControlValue( oldControl, 0 );
        
            SetControlValue( newControl, 1 );
        }
        fValue = value;
    }
    fMixed = false;
}
 
void
RadioGroup::SetMixed( SInt16 value )
{
    SInt16      numItems;
    SInt16      i;
    ControlRef  newControl = nil;
    
    numItems = GetHandleSize( fInfo ) / sizeof( RadioEntry );
    
    for ( i = 0; i < numItems; i++ )
    {
        if ( ((RadioEntry*)*fInfo)[ i ].value == value )
        {
            newControl = ((RadioEntry*)*fInfo)[ i ].control;
            break;
        }
    }
    if ( newControl )
    {
        SetControlValue( newControl, kControlCheckBoxMixedValue );
    }
    fValue = value;
 
    fMixed = true;
}
 
void
RadioGroup::SetValueByControl( ControlRef control )
{
    SInt16      numItems;
    SInt16      i;
    ControlRef  oldControl = nil;
    SInt16      value = 0;
    Boolean     valueFound = false;
        
    if ( fMixed )
    {
        numItems = GetHandleSize( fInfo ) / sizeof( RadioEntry );
        
        for ( i = 0; i < numItems; i++ )
        {
            if ( GetControlValue( ((RadioEntry*)*fInfo)[ i ].control ) )
            {
                SetControlValue( ((RadioEntry*)*fInfo)[ i ].control, 0 );
            }
        }
    }
    
    numItems = GetHandleSize( fInfo ) / sizeof( RadioEntry );
    
    for ( i = 0; i < numItems; i++ )
    {
        if ( ((RadioEntry*)*fInfo)[ i ].control == control )
        {
            value = ((RadioEntry*)*fInfo)[ i ].value;
            valueFound = true;
        }
        
        if ( ((RadioEntry*)*fInfo)[ i ].value == fValue )
            oldControl = ((RadioEntry*)*fInfo)[ i ].control;
    }
    if ( valueFound )
    {
        if ( oldControl )
            SetControlValue( oldControl, 0 );
    
        SetControlValue( control, 1 );
    
        fValue = value;
    }
    fMixed = false;
}


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