guistyle_item_radio.c

IT projecotr reference design.

/*****************************************************************************
**             TEXAS INSTRUMENTS PROPRIETARY INFORMATION
**
**  (c) Copyright, Texas Instruments Incorporated, 2006.
**      All Rights Reserved.
**
**  Property of Texas Instruments Incorporated. Restricted Rights -
**  Use, duplication, or disclosure is subject to restrictions set
**  forth in TI's program license agreement and associated documentation.
******************************************************************************/

#include "common.h"
#include "osd.h"
#include "guiStyle.h"

/* This item style requires a list field with two entries.  List index 0 = unchecked. 
 * List index 1 = checked.  It will uncheck all other adjacent radio buttons */
int08 guiStyle_item_Radio_SetListIndex( int16 itemId, uint08 index )
{
    int16 currentItemId;
    int16 tempItemId;
    int16 fieldId;
    OSDFIELDTYPE fieldType;
    uint08 listSize;
    uint16 styleId;
    uint08 i;
    
    OSD_GetItemStyle( itemId, &styleId );
    
    /* because this function is shared by the '_button' style, we need to convert the itemstyle IDs */
    if( styleId == MIST_ITEM_RADIOSTART_BUTTON )
        styleId = MIST_ITEM_RADIOSTART;
    if( styleId == MIST_ITEM_RADIOMIDDLE_BUTTON )
        styleId = MIST_ITEM_RADIOMIDDLE;
    if( styleId == MIST_ITEM_RADIOEND_BUTTON )
        styleId = MIST_ITEM_RADIOEND;    
    
    /* if item is not a radio button, return false. (this should never happen if guiStyle_item_lut is correct) */
    if( styleId != MIST_ITEM_RADIOSTART && styleId != MIST_ITEM_RADIOMIDDLE && styleId != MIST_ITEM_RADIOEND )
        return FALSE;
        
    /* set currentItemId equal to the beginning of the radio button list */
    currentItemId = itemId;
    tempItemId = OSD_GetPreviousItemID( currentItemId );
    while( tempItemId != OSD_ERR_ID_INVALID )
    {
        OSD_GetItemStyle( tempItemId, &styleId );
        if( styleId == MIST_ITEM_RADIOSTART )
        {
            currentItemId = tempItemId;
            break;
        }
        if( styleId != MIST_ITEM_RADIOMIDDLE && styleId != MIST_ITEM_RADIOEND )
        {
            break;
        }
    
        currentItemId = tempItemId;
        tempItemId = OSD_GetPreviousItemID( currentItemId );
    }
   
    OSD_GetItemStyle( currentItemId, &styleId );
    
    for( i=0; i<GUI_STYLE_MAXITEMS && currentItemId != OSD_ERR_ID_INVALID; i++ )
    { 
        /* search thru the fields for all lists in the item */
        fieldId = OSD_GetFirstFieldID( currentItemId );
        if( fieldId == OSD_ERR_ID_INVALID )
            return FAIL;
        
        while( fieldId != OSD_ERR_ID_INVALID )
        {
            if( OSD_GetFieldType( fieldId, &fieldType ) != PASS )
                break;
                
            /* for all lists with 2 entries we find in the item, set 0 or 1 */
            if( fieldType == LIST )
            {
                listSize = 0;
                OSD_GetListSize( fieldId, &listSize );
                if( listSize == 2 )
                {
                    /* Check only the radio button item specified by itemId */
                    if( currentItemId == itemId && index == TRUE )
                        OSD_SetListIndex( fieldId, 1 );   /* checked */
                    else
                        OSD_SetListIndex( fieldId, 0 );   /* unchecked */         
                }          
            }    
            fieldId = OSD_GetNextFieldID( fieldId );
        }
        
        if( styleId == MIST_ITEM_RADIOEND )
            break;
        
        currentItemId = OSD_GetNextItemID( currentItemId );
        OSD_GetItemStyle( currentItemId, &styleId );
        
        if( styleId != MIST_ITEM_RADIOSTART && styleId != MIST_ITEM_RADIOMIDDLE && styleId != MIST_ITEM_RADIOEND )
            break;
    }
    
    return PASS;
}

int08 guiStyle_item_Radio_GuiMsg( GUI_OPEN_MENU *menu, GUIMSG *msg )
{
    int16 item;
    
    if( msg == NULL || menu == NULL )
        return FAIL;

    switch( msg->type )
    {      
        case GUIMSG_SELECT:           
            item = menu->itemId;
            msg->type = GUIMSG_ASSERT;
            msg->data = &item;
            if( gui_AppAction_GuiMsg( menu->menuId, menu->itemId, msg ) != PASS )
            {
                /* if no item handler installed, update the display */
                guiStyle_item_SetListIndex( menu->itemId, TRUE );
            }
            break;

        case GUIMSG_LEFT:
        case GUIMSG_DOWN:              
        case GUIMSG_RIGHT:
        case GUIMSG_UP:            
        case GUIMSG_STRING:
        case GUIMSG_VALUE:
            // pass the message as is
            gui_AppAction_GuiMsg( menu->menuId, menu->itemId, msg );
            break;

        default:
            break;
    }    
    
    return PASS;    
}