src/ngmx/scrollw.c

   1 /*
   2  * $Id$
   3  *
   4  *       This source code is part of
   5  *
   6  *        G   R   O   M   A   C   S
   7  *
   8  * GROningen MAchine for Chemical Simulations
   9  *
  10  *               VERSION 2.0
  11  *
  12  * Copyright (c) 1991-1999
  13  * BIOSON Research Institute, Dept. of Biophysical Chemistry
  14  * University of Groningen, The Netherlands
  15  *
  16  * Please refer to:
  17  * GROMACS: A message-passing parallel molecular dynamics implementation
  18  * H.J.C. Berendsen, D. van der Spoel and R. van Drunen
  19  * Comp. Phys. Comm. 91, 43-56 (1995)
  20  *
  21  * Also check out our WWW page:
  22  * http://md.chem.rug.nl/~gmx
  23  * or e-mail to:
  24  * gromacs@chem.rug.nl
  25  *
  26  * And Hey:
  27  * Great Red Oystrich Makes All Chemists Sane
  28  */
  29 static char *SRCID_scrollw_c = "$Id$";
  30
  31 #include <sysstuff.h>
  32 #include <Xstuff.h>
  33 #include <xutil.h>
  34 #include <smalloc.h>
  35 #include <macros.h>
  36 #include <futil.h>
  37 #include <string2.h>
  38
  39 #define YSPACE 2
  40
  41 typedef struct {
  42   t_windata   wd;               /* Window structure                     */
  43   int         nlines,top;       /* Number of lines, current top line    */
  44   char        **lines;          /* The strings                          */
  45   int         wheight,wwidth;   /* The size of the window in chars      */
  46   XFontStruct *font;            /* Font                                 */
  47   unsigned long       fg,bg;            /* Colours                              */
  48 } t_scrollw;
  49
  50 static void calc_scrollw(t_scrollw *sw,int w,int h)
  51 {
  52   sw->wd.width=w;
  53   sw->wd.height=h;
  54   sw->wheight=h/(YSPACE+XTextHeight(sw->font));
  55   sw->wwidth=w/XTextWidth(sw->font,"W",1);
  56 }
  57
  58 static bool SWCallback(t_x11 *x11,XEvent *event,Window w,void *data)
  59 {
  60   t_scrollw *sw;
  61   int       i,y,nl,barw,btop,bheight;
  62   real      h,frac;
  63
  64   sw=(t_scrollw *)data;
  65
  66   /* Calc some bar data */
  67   barw=20;
  68   h=XTextHeight(sw->font)+YSPACE;
  69   frac=min(1.0,((real)sw->wheight)/((real)sw->nlines));
  70   btop=((((real)sw->top)/((real)sw->nlines)))*(sw->wd.height);
  71   bheight=frac*sw->wd.height;
  72   bheight-=bheight/h;
  73
  74   switch(event->type) {
  75   case Expose:
  76     nl=min(sw->nlines,sw->top+sw->wheight);
  77     y=0;
  78
  79     XClearWindow(x11->disp,w);
  80 #ifdef DEBUG
  81     printf("btop: %d, bheight: %d, frac: %e, h: %e\n",btop,bheight,frac,h);
  82 #endif
  83     /* Draw the bar */
  84     XSetForeground(x11->disp,x11->gc,LIGHTGREY);
  85     XFillRectangle(x11->disp,w,x11->gc,2,btop+2,barw-4,bheight-4);
  86     XDrawLine(x11->disp,w,x11->gc,barw,0,barw,sw->wd.height);
  87
  88     /* Draw the text */
  89     XSetForeground(x11->disp,x11->gc,sw->fg);
  90     for(i=sw->top; (i<nl); i++) {
  91       SpecialTextInRect(x11,sw->font,w,
  92                         sw->lines[i],barw+2,y,sw->wd.width-barw-4,(int)h,
  93                         eXLeft,eYCenter);
  94       y+=h;
  95     }
  96     XSetForeground(x11->disp,x11->gc,x11->fg);
  97     break;
  98   case ConfigureNotify:
  99     calc_scrollw(sw,event->xconfigure.width,event->xconfigure.height);
 100     break;
 101   case ButtonPress:
 102     if (event->xbutton.x < barw) {
 103       int y=event->xbutton.y;
 104
 105       if (sw->nlines > sw->wheight) {
 106         if (y<btop)
 107           sw->top=max(0,sw->top-1);
 108         else if (y>btop+bheight)
 109           sw->top=min(sw->nlines-sw->wheight,sw->top+1);
 110         else
 111           break;
 112         ExposeWin(x11->disp,sw->wd.self);
 113       }
 114     }
 115     break;
 116   default:
 117     break;
 118   }
 119
 120   return FALSE;
 121 }
 122
 123 t_scrollw *init_scrollw(t_x11 *x11,Window parent,int x,int y,int w,int h,
 124                         unsigned long fg,unsigned long bg)
 125 {
 126   t_scrollw *sw;
 127
 128   snew(sw,1);
 129
 130   InitWin(&sw->wd,x,y,w,h,1,"Scroll Window");
 131   sw->fg=fg;
 132   sw->bg=bg;
 133   sw->font=x11->font;
 134   sw->wd.self=XCreateSimpleWindow(x11->disp,parent,x,y,w,h,
 135                                   sw->wd.bwidth,fg,bg);
 136   x11->RegisterCallback(x11,sw->wd.self,parent,SWCallback,sw);
 137   x11->SetInputMask(x11,sw->wd.self,ExposureMask | ButtonPressMask |
 138                     StructureNotifyMask);
 139   calc_scrollw(sw,w,h);
 140
 141   return sw;
 142 }
 143
 144 void show_scrollw(t_x11 *x11,t_scrollw *sw)
 145 {
 146   XMapWindow(x11->disp,sw->wd.self);
 147 }
 148
 149 char *tab2spc(char *buf)
 150 {
 151   char *buf2;
 152   char *new;
 153   int  i,j;
 154
 155   snew(buf2,8*strlen(buf)+1);
 156   for(i=j=0; (buf[i]!='\0'); i++)
 157     if (buf[i]=='\t')
 158       do {
 159         buf2[j++]=' ';
 160       } while ((j % 8)!=0);
 161     else
 162       buf2[j++]=buf[i];
 163   buf2[j]='\0';
 164   new=strdup(buf2);
 165   sfree(buf2);
 166   return new;
 167 }
 168
 169 void read_lines(FILE *in,t_scrollw *sw)
 170 {
 171   char buf[1024];
 172
 173   while (fgets2(buf,1023,in)) {
 174     sw->nlines++;
 175     srenew(sw->lines,sw->nlines);
 176     sw->lines[sw->nlines-1]=tab2spc(buf);
 177   }
 178 }
 179
 180 void main(int argc, char *argv[])
 181 {
 182   t_x11     *x11;
 183   t_scrollw *sw;
 184
 185   if ((x11=GetX11(&argc,argv))==NULL) {
 186     fprintf(stderr,"No X!\n");
 187     exit(1);
 188   }
 189   sw=init_scrollw(x11,x11->root,0,0,600,200,WHITE,BLACK);
 190   read_lines(stdin,sw);
 191   show_scrollw(x11,sw);
 192   x11->MainLoop(x11);
 193
 194   x11->CleanUp(x11);
 195 }