errorbox.cc

来自「模糊聚类的算法实现程序」· CC 代码 · 共 73 行

//**************************************************************
//*   filename: errorbox.cc                                    *
//*                                                            *
//**************************************************************
//* programmed by: Thomas Wagner                               *
//* last change:  (XXX: not updated)                           *
//**************************************************************

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "errorbox.h"

extern unsigned long whitepix, redpix;
extern Cursor waitcursor;

ErrorBox::ErrorBox (Display * initdisplay,
	  GC initgc,
	  MainWindow * Parentwindow,
	  XFontStruct * initfontstruct,
	  int initx, int inity,
	  int initwidth, int initheight):
Window_Info (initdisplay,
	     initgc, Parentwindow->GetWindow (),
	     initfontstruct,
	     initx, inity,
	     initwidth, initheight,
	     NULL,
	     1)
{
  ChangeText (text);

  SetSelectedInput (ExposureMask | ButtonPressMask);
}

void 
ErrorBox::Redraw ()
{
  XSetForeground (display, gc, redpix);
  XFillRectangle (display, window, gc, 0, 0, width, height);
  XSetForeground (display, gc, whitepix);
  if (text != NULL) {
    short textx, texty;
    textx = (int) ((width - XTextWidth (fontstruct, text, 
					strlen (text))) * .5) + 1;
    texty = (int) ((height + fontstruct->max_bounds.ascent +
     fontstruct->max_bounds.descent) * .5 - fontstruct->max_bounds.descent);
    XDrawString (display, window, gc, textx, texty, text, strlen (text));
  }
}

void 
ErrorBox::ChangeText (char *newtext)
{
  text = newtext;
  Redraw ();
}

void 
ErrorBox::HandleEvent (XEvent * Event)
{
  switch (Event->type) {
  case Expose:
    if (Event->xexpose.count == 0)
      Redraw ();
    break;
  case ButtonPress:
    if (Event->xbutton.button == Button1)
      UnmapMe ();
  }
}