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RStatus.cpp

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// Copyright 2002 Kenneth Guy,
// 
// You are free to take the source and do as you wish with it.
// However it would be nice if you let me know if the code was useful
// to you and give me an acknowledgement if you use a significant portion
// of the code in an application.
// 
// RStatus.cpp

#include <e32std.h>
#include <e32svr.h>

#include "RStatus.h"

RStatus::RStatus() :  iStatusData(NULL) {

}

TInt RStatus::Open(const TUint16 *aStatusData) {
  TInt error=iScreen.Open();
  if(error==KErrNone) {    
    iSavedScore=-1;
    iSavedLives=-1;
    iSavedHealth=-1;
    iStatusData=aStatusData;
    }  
  return(error);
}

void RStatus::Close() {
  iScreen.Close();
  iStatusData=NULL;
}

void RStatus::Draw(TInt aScore, TInt aLives, TInt aHealth) {
  iSavedScore=-1;
  iSavedLives=-1;
  iSavedHealth=-1;
  Update(aScore,aLives,aHealth);
}

void RStatus::Update(TInt aScore, TInt aLives, TInt aHealth) {
  if(iStatusData==NULL)
    return;
  TInt offset=0;
  if(iSavedScore==-1) {
    while(iStatusData[offset++]!=0xffff) {
      RScreenUtils::TPicture pics;
      pics.iData =  iStatusData+(iStatusData[offset++]/2);
      pics.iXSize=iStatusData[offset++];
      pics.iYSize=iStatusData[offset++];
      pics.iXPos=iStatusData[offset++];
      pics.iYPos=iStatusData[offset++];
      iScreen.DrawPicture(pics);
    }
  } else {
    while(iStatusData[offset++]!=0xffff) {};
  }

  UpdateSingle(offset,iSavedHealth,aHealth);
  // don't display the life the player is using
  UpdateSingle(offset,iSavedLives,aLives-1);

  if(iSavedScore!=aScore) {
    TUint16 x;
    TUint16 y;
    x=iStatusData[offset++];
    y=iStatusData[offset++];
    TUint16 foreColor=iStatusData[offset++];
    TUint16 backColor=iStatusData[offset++];
    iScreen.Number(x,y,aScore,foreColor,backColor);
    iSavedScore=aScore;
  }
}

void RStatus::UpdateSingle(TInt &aOffset,TInt &aSaved, TInt aNew) {
  RScreenUtils::TPicture picture;
  RScreenUtils::TBlank blank;
  picture.iData = iStatusData+(iStatusData[aOffset++]/2);
  picture.iXSize=iStatusData[aOffset++];
  blank.iXSize=picture.iXSize;
  picture.iYSize=iStatusData[aOffset++];
  blank.iYSize=picture.iYSize;
  blank.iColor=iStatusData[aOffset++];
  picture.iXPos=iStatusData[aOffset++];
  blank.iXPos=picture.iXPos;
  TInt pos=0;
  while(picture.iXPos!=0xffff) {
    picture.iYPos=iStatusData[aOffset++];
    blank.iYPos=picture.iYPos;
    pos++;
    
    if(pos<=aNew && pos > aSaved)
      iScreen.DrawPicture(picture);
    
    if(pos > aNew && pos <= aSaved)
      iScreen.BlankArea(blank);
    
    picture.iXPos=iStatusData[aOffset++];
    blank.iXPos=picture.iXPos;
  }
  aSaved=aNew;
}

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