InfoLine.H

/* InfoLine.H */
/* $Revision: 1.6 $ InfoLine.H  $Date: 2000/05/12 12:55:32 $ */
#ifndef __InfoLine_H
#define __InfoLine_H

#include <X11/Intrinsic.h>


/* Colors used to attract user's attention  */
#define DEBUG_FG    "grey74"
#define HINT_FG     "SeaGreen4"
#define INFO_FG     "black"
#define WARNING_FG  "red"
#define ERROR_FG    "white"
#define ERROR_BG    "red"
#define FATAL_FG    "yellow"
#define FATAL_BG    "red"


#define STORED_HISTORY_MSGS 200


/*************************************************************
 * One history item.
 *************************************************************/
struct HistItem
{
  int   msg_level;  /* usual EL_* from <mix/wenv.h> */
  void* msg;        /* XmString message */
};


#define AnyType     HistItem
#define AnyAr       HistItemAr
#include <mix/AnyAr.H>


/*************************************************************
 * Structure of GUI for multilined object with history.
 *************************************************************/
struct InfoMultiLine
{
  int       lines_n;    /* count of widgets in wLines */
  Widget    *wLines;    /* lines of history */
};


/*************************************************************
 * Class for information/status line.
 *************************************************************/
class InfoLine
{
protected:

  /* Widgets used as information pane -- XmLabel or XmTextField */
  Widget    *wInfoLines;

  /* What widgets are used? */
  enum {
    xmLabels,
    xmTextFields
    }       w_class;

  /* Count of widgets in wInfoLines */
  int       lines_n;

  /* Saved history lines */
  HistItemAr    hiar;

  /* History index of the wInfoLines[0] line */
  int       hist_index;

  /* Max number of stored history messages */
  int       hist_limit;

  /* Get colors of fg,bg by e_level */
  void      GetColors (int e_level, Pixel& fg, Pixel& bg);

  /* Show history lines from hist_index */
  void      ShowLines ();

public:

  InfoLine (Widget w, int stored_msgs = STORED_HISTORY_MSGS);   /* lines_n=1 */
  InfoLine (InfoMultiLine& iml, int stored_msgs = STORED_HISTORY_MSGS);
  virtual ~InfoLine ();

  /*************************************************************
   * Info line utilities.
   *************************************************************/
  void  Clear ();
  void  Message (char* szMessageString);
  void  Warning (char* szWarningString);
  void  Error (char* szErrorString);

  void  CommonMsg (int elevel, const char* szString);

  /* Returns widget of info line */
  operator Widget ()
    {return wInfoLines[0];}

  /* Scroll history to oldest messages */
  void  PrevMsg ();

  /* Scroll history to newest messages */
  void  NextMsg ();

};


#endif /* InfoLine.H */