guistyle_item_sliderwithtext.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"
#include "guiStyle_sub.h"

/* This function implements the OSD API calls for adjusting the                   
 * display on items with sliders and dynamic text. */
int08 guiStyle_item_SliderWithText_SetSingleValue( int16 itemId, int32 value, int32 min, int32 max )
{
    int16 fieldId;
    OSDFIELDTYPE fieldType;
    uint16 steps;
    uint16 string[6];
    
    /* check that everything is in range to avoid divide by zero */
    if( max < min )
        return FAIL;    
    if( value > max || value < min )
        return FAIL;

    /* search thru the fields for all Dynamic Text and Winsliders in the item */
    fieldId = OSD_GetFirstFieldID( itemId );
    if( fieldId == OSD_ERR_ID_INVALID )
        return FAIL;
    
    while( fieldId != OSD_ERR_ID_INVALID )
    {
        if( OSD_GetFieldType( fieldId, &fieldType ) != PASS )
            return FAIL;
        
        /* if we found the Dynamic Text, display the argument value appropriately */
        if( fieldType == DYNA_TEXT )
        {
            /* convert the argument value directly into a unicode string and display */
            guiStyle_sub_IntToDynamicTextString( value, string, FALSE );
            if( OSD_GetLanguageDirection( OSD_GetLanguage()) )
            {    
                /* use default font style instead of arabic font style for RTL language */
                OSD_SetDynaTextStringSpecial( fieldId, string, STYL_STYLE_2, TRUE );
            }
            else
            {
                OSD_SetDynaTextString( fieldId, string );
            }
        }
        
        /* if we found a Winslider or Charslider, display the argument value appropriately */
        if( fieldType == SLIDER_WIN || fieldType == SLIDER_CHAR )
        {
            /* Display the value as a percentage of the slider */
            OSD_GetSliderSteps( fieldId, &steps );
            /* the 'number of steps' for Winsliders does not include the zero position */
            /* this adjustment makes Winsliders consistent with Charsliders */
            if( fieldType == SLIDER_WIN )
                steps += 1;
            if( max == min )
                OSD_SetSliderValue( fieldId, steps/2 );
            else if( steps != 0 )
                OSD_SetSliderValue( fieldId, ((value-min)*(steps-1))/(max - min) );
        }
        
        
        
        fieldId = OSD_GetNextFieldID( fieldId );
    }        
   
    return PASS;
}

int08 guiStyle_item_SliderWithText_GuiMsg( GUI_OPEN_MENU *menu, GUIMSG *msg )
{
    int16 fieldId;
    OSDFIELDTYPE fieldType;
    uint16 value;
    uint16 steps;

    if( msg == NULL || menu == NULL )
        return FAIL;

    /* search thru the fields for the first list in the item */
    fieldId = OSD_GetFirstFieldID( menu->itemId );
    if( fieldId == OSD_ERR_ID_INVALID )
        return FAIL;

    while( fieldId != OSD_ERR_ID_INVALID )
    {
        if( OSD_GetFieldType( fieldId, &fieldType ) != PASS )
            return FAIL;
            
        /* use the first list to determine list size and current index */
        if( fieldType == SLIDER_WIN || fieldType == SLIDER_CHAR )
        {
            /* Get the list size and current index value */
            steps = 0;
            value = 0;
            OSD_GetSliderSteps( fieldId, &steps );
            OSD_GetSliderValue( fieldId, &value );   
            break;              
        }    
        fieldId = OSD_GetNextFieldID( fieldId );
    }
    
    if( fieldId == OSD_ERR_ID_INVALID )
        return FAIL;

    switch( msg->type )
    {
        case GUIMSG_LEFT:
            if( value > 0 )
                value--;
            msg->type = GUIMSG_DEC;
            msg->data = &value;
            break;
        
        case GUIMSG_DOWN:
            msg->type = GUIMSG_DEC_Y;
            msg->data = &value;
            break;
        
        case GUIMSG_RIGHT:
            if( value < steps )
                value++;
            msg->type = GUIMSG_INC;
            msg->data = &value;
            break;
        
        case GUIMSG_UP:
            msg->type = GUIMSG_INC_Y;
            msg->data = &value;
            break;
        
        case GUIMSG_SELECT:
            msg->type = GUIMSG_ASSERT;
            msg->data = &value;
            break;
        
        case GUIMSG_STRING:
        case GUIMSG_VALUE:
            // pass the message as is
            break;

        default:
            break;
    }    
    
    if( gui_AppAction_GuiMsg( menu->menuId, menu->itemId, msg ) != PASS )
    {
        /* if no item handler installed, update the display */
        guiStyle_item_SliderWithText_SetSingleValue( menu->itemId, value, 0, steps );
    }
    
    return PASS;
}