CAUGuiMeter.cpp

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/*
 *  CAUGuiDisplay.cpp
 *  CoreGraphics AudioUnit GUI framework
 *
 *  Created by Urs Heckmann on Sun Oct 27 2002.
 *  Copyright (c) 2002 __MyCompanyName__. All rights reserved.
 *
 */

#include "CAUGuiMeter.h"

CAUGuiMeter::CAUGuiMeter (  CAUGuiMan*              theChief,
                            UInt32                  internalIndex, 
                            eRect*                  theWhere,
                            CAUGuiResolution        theRes, 
                            CAUGuiGraphic*          theForeGround, 
                            CAUGuiGraphic*          theBackground)
                        
                        :   CAUGuiCtrl ( theChief, theWhere, theRes )
                            
{
        
    ForeGround = theForeGround;
    BackGround = theBackground;
    internalParamIndex = internalIndex;
    setType ( kCAUGui_Meter );

}



CAUGuiMeter::~CAUGuiMeter ()
{
    ForeGround = NULL;
    BackGround = NULL;

}

void CAUGuiMeter::idle()
{
    float fValue = Chief->getInternalParameter ( internalParamIndex );
    
    //printf ( "idling %d - %d - %f\n", (int)getID(), (int)internalParamIndex, fValue );
    
    if ( fValue > 1.f ) fValue = 1.f;
    if ( fValue < 0.f ) fValue = 0.f;
    
    ControlRef carbonControl = getCarbonControl();
    
    if ( carbonControl != NULL )
    {
        UInt32 max = GetControl32BitMaximum(carbonControl);
        UInt32 val = (UInt32)((float)max * fValue );
        SetControl32BitValue ( carbonControl, val );
    }
    
    //printf ( "idling %d\n", (int)getID() );
    
    CAUGuiCtrl::idle();
}

void CAUGuiMeter::draw(CGContextRef context, UInt32 portHeight )
{
    ControlRef carbonControl = getCarbonControl();
    
    UInt32 max = GetControl32BitMaximum(carbonControl);
    UInt32 val = GetControl32BitValue( carbonControl );

    CGImageRef theBack = NULL;
    
    CGRect bounds;
    
    getBounds()->to( &bounds, portHeight );
    
    if ( BackGround != NULL )
        theBack = BackGround->getImage();
        
    if ( theBack != NULL )
        CGContextDrawImage( context, bounds, theBack );
    
    
    if ( ForeGround != NULL )
    {
        float valNorm = (float) val / (float) max;
        
        ForeGround->draw ( context, portHeight, getForeBounds(), valNorm );
        
    }
}

(c) 2002 - 2003 by Urs Heckmann www.u-he.com