Date: 2016-07-24T16:46:41+00:00

Actual source code: xops.c
petsc-3.7.3 2016-07-24
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      1: /*
      2:     Defines the operations for the X PetscDraw implementation.
      3: */

      5: #include <../src/sys/classes/draw/impls/x/ximpl.h>         /*I  "petscsys.h" I*/

      7: /*
      8:      These macros transform from the users coordinates to the  X-window pixel coordinates.
      9: */
     10: #define XTRANS(draw,xwin,x)  ((int)(((xwin)->w-1)*((draw)->port_xl + (((x - (draw)->coor_xl)*((draw)->port_xr - (draw)->port_xl))/((draw)->coor_xr - (draw)->coor_xl)))))
     11: #define YTRANS(draw,xwin,y)  (((xwin)->h-1) - (int)(((xwin)->h-1)*((draw)->port_yl + (((y - (draw)->coor_yl)*((draw)->port_yr - (draw)->port_yl))/((draw)->coor_yr - (draw)->coor_yl)))))

     13: #define ITRANS(draw,xwin,i)  ((draw)->coor_xl + (((PetscReal)(i))*((draw)->coor_xr - (draw)->coor_xl)/((xwin)->w-1) - (draw)->port_xl)/((draw)->port_xr - (draw)->port_xl))
     14: #define JTRANS(draw,xwin,j)  ((draw)->coor_yl + (((PetscReal)(j))/((xwin)->h-1) + (draw)->port_yl - 1)*((draw)->coor_yr - (draw)->coor_yl)/((draw)->port_yl - (draw)->port_yr))

     19: static PetscErrorCode PetscDrawSetViewport_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr)
     20: {
     21:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
     22:   int            xa,ya,xb,yb,xmax = XiWin->w-1,ymax = XiWin->h-1;
     23:   XRectangle     box;

     27:   xa = (int)(xl*xmax); ya = ymax - (int)(yr*ymax);
     28:   xb = (int)(xr*xmax); yb = ymax - (int)(yl*ymax);
     29:   PetscDrawCollectiveBegin(draw);
     30:   box.x = (short)xa; box.width  = (unsigned short)(xb + 1 - xa);
     31:   box.y = (short)ya; box.height = (unsigned short)(yb + 1 - ya);
     32:   XSetClipRectangles(XiWin->disp,XiWin->gc.set,0,0,&box,1,Unsorted);
     33:   PetscDrawCollectiveEnd(draw);
     34:   return(0);
     35: }

     39: static PetscErrorCode PetscDrawCoordinateToPixel_X(PetscDraw draw,PetscReal x,PetscReal y,int *i,int *j)
     40: {
     41:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;

     44:   *i = XTRANS(draw,XiWin,x);
     45:   *j = YTRANS(draw,XiWin,y);
     46:   return(0);
     47: }

     51: static PetscErrorCode PetscDrawPixelToCoordinate_X(PetscDraw draw,int i,int j,PetscReal *x,PetscReal *y)
     52: {
     53:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;

     56:   *x = ITRANS(draw,XiWin,i);
     57:   *y = JTRANS(draw,XiWin,j);
     58:   return(0);
     59: }

     63: static PetscErrorCode PetscDrawPoint_X(PetscDraw draw,PetscReal x,PetscReal y,int c)
     64: {
     65:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
     66:   int         xx,yy,i,j;

     69:   xx = XTRANS(draw,XiWin,x);
     70:   yy = YTRANS(draw,XiWin,y);
     71:   PetscDrawXiSetColor(XiWin,c);
     72:   for (i=-1; i<2; i++) {
     73:     for (j=-1; j<2; j++) {
     74:       XDrawPoint(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xx+i,yy+j);
     75:     }
     76:   }
     77:   return(0);
     78: }

     82: static PetscErrorCode PetscDrawPointPixel_X(PetscDraw draw,int x,int y,int c)
     83: {
     84:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;

     87:   PetscDrawXiSetColor(XiWin,c);
     88:   XDrawPoint(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x,y);
     89:   return(0);
     90: }

     94: static PetscErrorCode PetscDrawLine_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr,int cl)
     95: {
     96:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
     97:   int         x_1,y_1,x_2,y_2;

    100:   PetscDrawXiSetColor(XiWin,cl);
    101:   x_1 = XTRANS(draw,XiWin,xl); x_2  = XTRANS(draw,XiWin,xr);
    102:   y_1 = YTRANS(draw,XiWin,yl); y_2  = YTRANS(draw,XiWin,yr);
    103:   XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_1,y_1,x_2,y_2);
    104:   return(0);
    105: }

    109: static PetscErrorCode PetscDrawArrow_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr,int cl)
    110: {
    111:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
    112:   int         x_1,y_1,x_2,y_2;

    115:   PetscDrawXiSetColor(XiWin,cl);
    116:   x_1 = XTRANS(draw,XiWin,xl); x_2 = XTRANS(draw,XiWin,xr);
    117:   y_1 = YTRANS(draw,XiWin,yl); y_2 = YTRANS(draw,XiWin,yr);
    118:   XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_1,y_1,x_2,y_2);
    119:   if (x_1 == x_2 && y_1 == y_2) return(0);
    120:   if (x_1 == x_2 && PetscAbs(y_1 - y_2) > 7) {
    121:     if (y_2 > y_1) {
    122:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2-3,y_2-3);
    123:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2-3);
    124:     } else {
    125:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2-3,y_2+3);
    126:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2+3);
    127:     }
    128:   }
    129:   if (y_1 == y_2 && PetscAbs(x_1 - x_2) > 7) {
    130:     if (x_2 > x_1) {
    131:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2-3,y_2-3,x_2,y_2);
    132:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2-3,y_2+3,x_2,y_2);
    133:     } else {
    134:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2-3);
    135:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2+3);
    136:     }
    137:   }
    138:   return(0);
    139: }

    143: static PetscErrorCode PetscDrawRectangle_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr,int c1,int c2,int c3,int c4)
    144: {
    145:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
    146:   int         x,y,w,h,c = (c1 + c2 + c3 + c4)/4;

    149:   PetscDrawXiSetColor(XiWin,c);
    150:   x = XTRANS(draw,XiWin,xl); w = XTRANS(draw,XiWin,xr) + 1 - x; if (w <= 0) w = 1;
    151:   y = YTRANS(draw,XiWin,yr); h = YTRANS(draw,XiWin,yl) + 1 - y; if (h <= 0) h = 1;
    152:   XFillRectangle(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x,y,w,h);
    153:   return(0);
    154: }

    158: static PetscErrorCode PetscDrawEllipse_X(PetscDraw draw,PetscReal x,PetscReal y,PetscReal a,PetscReal b,int c)
    159: {
    160:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
    161:   int         xA,yA,w,h;

    164:   PetscDrawXiSetColor(XiWin, c);
    165:   xA = XTRANS(draw,XiWin, x - a/2); w = XTRANS(draw,XiWin, x + a/2) + 1 - xA; w = PetscAbs(w);
    166:   yA = YTRANS(draw,XiWin, y + b/2); h = YTRANS(draw,XiWin, y - b/2) + 1 - yA; h = PetscAbs(h);
    167:   XFillArc(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xA,yA,w,h,0,360*64);
    168:   return(0);
    169: }

    171: PETSC_INTERN PetscErrorCode PetscDrawInterpolatedTriangle_X(PetscDraw_X*,int,int,int,int,int,int,int,int,int);

    175: static PetscErrorCode PetscDrawTriangle_X(PetscDraw draw,PetscReal X1,PetscReal Y_1,PetscReal X2,PetscReal Y2,PetscReal X3,PetscReal Y3,int c1,int c2,int c3)
    176: {
    177:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;

    181:   if (c1 == c2 && c2 == c3) {
    182:     XPoint pt[3];
    183:     PetscDrawXiSetColor(XiWin,c1);
    184:     pt[0].x = XTRANS(draw,XiWin,X1);
    185:     pt[0].y = YTRANS(draw,XiWin,Y_1);
    186:     pt[1].x = XTRANS(draw,XiWin,X2);
    187:     pt[1].y = YTRANS(draw,XiWin,Y2);
    188:     pt[2].x = XTRANS(draw,XiWin,X3);
    189:     pt[2].y = YTRANS(draw,XiWin,Y3);
    190:     XFillPolygon(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,pt,3,Convex,CoordModeOrigin);
    191:   } else {
    192:     int x1,y_1,x2,y2,x3,y3;
    193:     x1   = XTRANS(draw,XiWin,X1);
    194:     y_1  = YTRANS(draw,XiWin,Y_1);
    195:     x2   = XTRANS(draw,XiWin,X2);
    196:     y2   = YTRANS(draw,XiWin,Y2);
    197:     x3   = XTRANS(draw,XiWin,X3);
    198:     y3   = YTRANS(draw,XiWin,Y3);
    199:     PetscDrawInterpolatedTriangle_X(XiWin,x1,y_1,c1,x2,y2,c2,x3,y3,c3);
    200:   }
    201:   return(0);
    202: }

    206: static PetscErrorCode PetscDrawStringSetSize_X(PetscDraw draw,PetscReal x,PetscReal y)
    207: {
    208:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
    209:   int            w,h;

    213:   w    = (int)((XiWin->w)*x*(draw->port_xr - draw->port_xl)/(draw->coor_xr - draw->coor_xl));
    214:   h    = (int)((XiWin->h)*y*(draw->port_yr - draw->port_yl)/(draw->coor_yr - draw->coor_yl));
    215:   PetscFree(XiWin->font);
    216:   PetscDrawXiFontFixed(XiWin,w,h,&XiWin->font);
    217:   return(0);
    218: }

    222: static PetscErrorCode PetscDrawStringGetSize_X(PetscDraw draw,PetscReal *x,PetscReal  *y)
    223: {
    224:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
    225:   PetscReal   w,h;

    228:   w = XiWin->font->font_w; h = XiWin->font->font_h;
    229:   if (x) *x = w*(draw->coor_xr - draw->coor_xl)/((XiWin->w)*(draw->port_xr - draw->port_xl));
    230:   if (y) *y = h*(draw->coor_yr - draw->coor_yl)/((XiWin->h)*(draw->port_yr - draw->port_yl));
    231:   return(0);
    232: }

    236: static PetscErrorCode PetscDrawString_X(PetscDraw draw,PetscReal x,PetscReal y,int c,const char chrs[])
    237: {
    238:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
    239:   int            xx,yy,descent = XiWin->font->font_descent;
    240:   size_t         len;
    241:   char           *substr;
    242:   PetscToken     token;

    246:   xx = XTRANS(draw,XiWin,x);
    247:   yy = YTRANS(draw,XiWin,y);
    248:   PetscDrawXiSetColor(XiWin,c);

    250:   PetscTokenCreate(chrs,'\n',&token);
    251:   PetscTokenFind(token,&substr);
    252:   while (substr) {
    253:     PetscStrlen(substr,&len);
    254:     XDrawString(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xx,yy-descent,substr,len);
    255:     yy  += XiWin->font->font_h;
    256:     PetscTokenFind(token,&substr);
    257:   }
    258:   PetscTokenDestroy(&token);
    259:   return(0);
    260: }

    264: static PetscErrorCode PetscDrawStringVertical_X(PetscDraw draw,PetscReal x,PetscReal y,int c,const char text[])
    265: {
    266:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
    267:   int            xx,yy,offset = XiWin->font->font_h - XiWin->font->font_descent;
    268:   char           chr[2] = {0, 0};

    271:   xx = XTRANS(draw,XiWin,x);
    272:   yy = YTRANS(draw,XiWin,y);
    273:   PetscDrawXiSetColor(XiWin,c);
    274:   while ((chr[0] = *text++)) {
    275:     XDrawString(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xx,yy+offset,chr,1);
    276:     yy += XiWin->font->font_h;
    277:   }
    278:   return(0);
    279: }

    283: static PetscErrorCode PetscDrawFlush_X(PetscDraw draw)
    284: {
    285:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
    286:   PetscMPIInt    rank;

    290:   /* make sure the X server processed requests from all processes */
    291:   PetscDrawCollectiveBegin(draw);
    292:   XSync(XiWin->disp,False);
    293:   PetscDrawCollectiveEnd(draw);
    294:   MPI_Barrier(PetscObjectComm((PetscObject)draw));

    296:   /* transfer pixmap contents to window (only the first process does this) */
    297:   if (XiWin->drw && XiWin->win) {
    298:     MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
    299:     PetscDrawCollectiveBegin(draw);
    300:     if (!rank) XCopyArea(XiWin->disp,XiWin->drw,XiWin->win,XiWin->gc.set,0,0,XiWin->w,XiWin->h,0,0);
    301:     if (!rank) XSync(XiWin->disp,False);
    302:     PetscDrawCollectiveEnd(draw);
    303:     MPI_Barrier(PetscObjectComm((PetscObject)draw));
    304:   }
    305:   return(0);
    306: }

    310: static PetscErrorCode PetscDrawClear_X(PetscDraw draw)
    311: {
    312:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
    313:   int            xmax = XiWin->w-1,  ymax = XiWin->h-1;
    314:   PetscReal      xl = draw->port_xl, yl = draw->port_yl;
    315:   PetscReal      xr = draw->port_xr, yr = draw->port_yr;
    316:   PetscMPIInt    rank;

    320:   /* make sure the X server processed requests from all processes */
    321:   PetscDrawCollectiveBegin(draw);
    322:   XSync(XiWin->disp,False);
    323:   PetscDrawCollectiveEnd(draw);
    324:   MPI_Barrier(PetscObjectComm((PetscObject)draw));

    326:   /* only the first process handles the clearing business */
    327:   PetscDrawCollectiveBegin(draw);
    328:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
    329:   if (!rank) {
    330:     int xa = (int)(xl*xmax), ya = ymax - (int)(yr*ymax);
    331:     int xb = (int)(xr*xmax), yb = ymax - (int)(yl*ymax);
    332:     unsigned int w = (unsigned int)(xb + 1 - xa);
    333:     unsigned int h = (unsigned int)(yb + 1 - ya);
    334:     PetscDrawXiSetPixVal(XiWin,XiWin->background);
    335:     XFillRectangle(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xa,ya,w,h);
    336:     XSync(XiWin->disp,False);
    337:   }
    338:   PetscDrawCollectiveEnd(draw);
    339:   MPI_Barrier(PetscObjectComm((PetscObject)draw));
    340:   return(0);
    341: }

    345: static PetscErrorCode PetscDrawSetDoubleBuffer_X(PetscDraw draw)
    346: {
    347:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    348:   PetscMPIInt    rank;

    352:   if (win->drw) return(0);
    353:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

    355:   PetscDrawCollectiveBegin(draw);
    356:   if (!rank) {PetscDrawXiQuickPixmap(win);}
    357:   PetscDrawCollectiveEnd(draw);
    358:   MPI_Bcast(&win->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
    359:   return(0);
    360: }

    364: static PetscErrorCode PetscDrawGetPopup_X(PetscDraw draw,PetscDraw *popup)
    365: {
    366:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    367:   PetscBool      flg  = PETSC_TRUE;

    371:   PetscOptionsGetBool(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-draw_popup",&flg,NULL);
    372:   if (!flg || !win->win) {*popup = NULL; return(0);}

    374:   PetscDrawCreate(PetscObjectComm((PetscObject)draw),draw->display,NULL,win->x,win->y+win->h+10,220,220,popup);
    375:   PetscObjectSetOptionsPrefix((PetscObject)*popup,"popup_");
    376:   PetscObjectAppendOptionsPrefix((PetscObject)*popup,((PetscObject)draw)->prefix);
    377:   PetscDrawSetType(*popup,PETSC_DRAW_X);
    378:   draw->popup = *popup;
    379:   return(0);
    380: }

    384: static PetscErrorCode PetscDrawSetTitle_X(PetscDraw draw,const char title[])
    385: {
    386:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    387:   PetscMPIInt    rank;

    391:   if (!win->win) return(0);
    392:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
    393:   PetscDrawCollectiveBegin(draw);
    394:   if (!rank) {
    395:     size_t        len;
    396:     XTextProperty prop;
    397:     PetscStrlen(title,&len);
    398:     XGetWMName(win->disp,win->win,&prop);
    399:     XFree((void*)prop.value);
    400:     prop.value  = (unsigned char*)title;
    401:     prop.nitems = (long)len;
    402:     XSetWMName(win->disp,win->win,&prop);
    403:   }
    404:   PetscDrawCollectiveEnd(draw);
    405:   return(0);
    406: }

    410: static PetscErrorCode PetscDrawCheckResizedWindow_X(PetscDraw draw)
    411: {
    412:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    413:   int            xywh[4];
    414:   PetscMPIInt    rank;

    418:   if (!win->win) return(0);
    419:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

    421:   PetscDrawCollectiveBegin(draw);
    422:   if (!rank) {PetscDrawXiGetGeometry(win,xywh,xywh+1,xywh+2,xywh+3);}
    423:   PetscDrawCollectiveEnd(draw);
    424:   MPI_Bcast(xywh,4,MPI_INT,0,PetscObjectComm((PetscObject)draw));

    426:   /* record new window position */
    427:   draw->x = win->x = xywh[0];
    428:   draw->y = win->y = xywh[1];
    429:   if (xywh[2] == win->w && xywh[3] == win->h) return(0);
    430:   /* record new window sizes */
    431:   draw->w = win->w = xywh[2];
    432:   draw->h = win->h = xywh[3];

    434:   /* recreate pixmap (only first processor does this) */
    435:   PetscDrawCollectiveBegin(draw);
    436:   if (!rank && win->drw) {PetscDrawXiQuickPixmap(win);}
    437:   PetscDrawCollectiveEnd(draw);
    438:   MPI_Bcast(&win->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
    439:   /* reset the clipping */
    440:   PetscDrawSetViewport_X(draw,draw->port_xl,draw->port_yl,draw->port_xr,draw->port_yr);
    441:   return(0);
    442: }

    446: static PetscErrorCode PetscDrawResizeWindow_X(PetscDraw draw,int w,int h)
    447: {
    448:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    449:   PetscMPIInt    rank;

    453:   if (w == win->w && h == win->h) return(0);
    454:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

    456:   if (win->win) {
    457:     PetscDrawCollectiveBegin(draw);
    458:     if (!rank) {PetscDrawXiResizeWindow(win,w,h);}
    459:     PetscDrawCollectiveEnd(draw);
    460:     PetscDrawCheckResizedWindow_X(draw);
    461:   } else if (win->drw) {
    462:     draw->w = win->w = w; draw->h = win->h = h;
    463:     /* recreate pixmap (only first processor does this) */
    464:     PetscDrawCollectiveBegin(draw);
    465:     if (!rank) {PetscDrawXiQuickPixmap(win);}
    466:     MPI_Bcast(&win->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
    467:     /* reset the clipping */
    468:     PetscDrawCollectiveEnd(draw);
    469:     PetscDrawSetViewport_X(draw,draw->port_xl,draw->port_yl,draw->port_xr,draw->port_yr);
    470:   }
    471:   return(0);
    472: }

    474: #include <X11/cursorfont.h>

    478: static PetscErrorCode PetscDrawGetMouseButton_X(PetscDraw draw,PetscDrawButton *button,PetscReal *x_user,PetscReal *y_user,PetscReal *x_phys,PetscReal *y_phys)
    479: {
    480:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    481:   Cursor         cursor;
    482:   XEvent         report;
    483:   Window         root,child;
    484:   int            root_x,root_y,px=0,py=0;
    485:   unsigned int   w,h,border,depth;
    486:   unsigned int   keys_button;
    487:   PetscMPIInt    rank;
    488:   PetscReal      xx,yy;

    492:   *button = PETSC_BUTTON_NONE;
    493:   if (!win->win) return(0);
    494:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

    496:   PetscDrawCollectiveBegin(draw);
    497:   if (rank) goto finally;

    499:   /* change cursor to indicate input */
    500:   cursor = XCreateFontCursor(win->disp,XC_hand2); if (!cursor) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Unable to create X cursor");
    501:   XDefineCursor(win->disp,win->win,cursor);
    502:   /* wait for mouse button events */
    503:   XSelectInput(win->disp,win->win,ButtonPressMask|ButtonReleaseMask);
    504:   while (XCheckTypedEvent(win->disp,ButtonPress,&report));
    505:   XMaskEvent(win->disp,ButtonReleaseMask,&report);
    506:   /* get mouse pointer coordinates */
    507:   XQueryPointer(win->disp,report.xmotion.window,&root,&child,&root_x,&root_y,&px,&py,&keys_button);
    508:   /* the user may resize the window before pressing the mouse button */
    509:   XGetGeometry(win->disp,win->win,&root,&root_x,&root_y,&w,&h,&border,&depth);
    510:   /* cleanup input event handler and cursor  */
    511:   XSelectInput(win->disp,win->win,NoEventMask);
    512:   XUndefineCursor(win->disp,win->win);
    513:   XFreeCursor(win->disp, cursor);
    514:   XSync(win->disp,False);

    516:   switch (report.xbutton.button) {
    517:   case Button1: *button = PETSC_BUTTON_LEFT; break;
    518:   case Button2: *button = PETSC_BUTTON_CENTER; break;
    519:   case Button3: *button = PETSC_BUTTON_RIGHT; break;
    520:   case Button4: *button = PETSC_BUTTON_WHEEL_UP; break;
    521:   case Button5: *button = PETSC_BUTTON_WHEEL_DOWN; break;
    522:   }
    523:   if (report.xbutton.state & ShiftMask) {
    524:     switch (report.xbutton.button) {
    525:     case Button1: *button = PETSC_BUTTON_LEFT_SHIFT; break;
    526:     case Button2: *button = PETSC_BUTTON_CENTER_SHIFT; break;
    527:     case Button3: *button = PETSC_BUTTON_RIGHT_SHIFT; break;
    528:     }
    529:   }
    530:   xx = ((PetscReal)px)/w;
    531:   yy = 1 - ((PetscReal)py)/h;
    532:   if (x_user) *x_user = draw->coor_xl + (xx - draw->port_xl)*(draw->coor_xr - draw->coor_xl)/(draw->port_xr - draw->port_xl);
    533:   if (y_user) *y_user = draw->coor_yl + (yy - draw->port_yl)*(draw->coor_yr - draw->coor_yl)/(draw->port_yr - draw->port_yl);
    534:   if (x_phys) *x_phys = xx;
    535:   if (y_phys) *y_phys = yy;

    537: finally:
    538:   PetscDrawCollectiveEnd(draw);
    539:   PetscDrawCheckResizedWindow_X(draw);
    540:   return(0);
    541: }

    545: static PetscErrorCode PetscDrawPause_X(PetscDraw draw)
    546: {
    547:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;

    551:   if (!win->win) return(0);
    552:   if (draw->pause > 0) PetscSleep(draw->pause);
    553:   else if (draw->pause == -1) {
    554:     PetscDrawButton button = PETSC_BUTTON_NONE;
    555:     PetscDrawGetMouseButton(draw,&button,NULL,NULL,NULL,NULL);
    556:     if (button == PETSC_BUTTON_CENTER) draw->pause = 0;
    557:   }
    558:   return(0);
    559: }

    563: static PetscErrorCode PetscDrawDestroy_X(PetscDraw draw)
    564: {
    565:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;

    569:   PetscDrawDestroy(&draw->popup);
    570:   PetscDrawXiClose(win);
    571:   PetscFree(draw->data);
    572:   return(0);
    573: }

    575: static       PetscErrorCode PetscDrawGetSingleton_X(PetscDraw,PetscDraw*);
    576: static       PetscErrorCode PetscDrawRestoreSingleton_X(PetscDraw,PetscDraw*);
    577: PETSC_INTERN PetscErrorCode PetscDrawGetImage_X(PetscDraw,unsigned char[][3],unsigned int*,unsigned int*,unsigned char*[]);

    579: static struct _PetscDrawOps DvOps = { PetscDrawSetDoubleBuffer_X,
    580:                                       PetscDrawFlush_X,
    581:                                       PetscDrawLine_X,
    582:                                       0,
    583:                                       0,
    584:                                       PetscDrawPoint_X,
    585:                                       0,
    586:                                       PetscDrawString_X,
    587:                                       PetscDrawStringVertical_X,
    588:                                       PetscDrawStringSetSize_X,
    589:                                       PetscDrawStringGetSize_X,
    590:                                       PetscDrawSetViewport_X,
    591:                                       PetscDrawClear_X,
    592:                                       PetscDrawRectangle_X,
    593:                                       PetscDrawTriangle_X,
    594:                                       PetscDrawEllipse_X,
    595:                                       PetscDrawGetMouseButton_X,
    596:                                       PetscDrawPause_X,
    597:                                       0,
    598:                                       0,
    599:                                       PetscDrawGetPopup_X,
    600:                                       PetscDrawSetTitle_X,
    601:                                       PetscDrawCheckResizedWindow_X,
    602:                                       PetscDrawResizeWindow_X,
    603:                                       PetscDrawDestroy_X,
    604:                                       0,
    605:                                       PetscDrawGetSingleton_X,
    606:                                       PetscDrawRestoreSingleton_X,
    607:                                       0,
    608:                                       PetscDrawGetImage_X,
    609:                                       0,
    610:                                       PetscDrawArrow_X,
    611:                                       PetscDrawCoordinateToPixel_X,
    612:                                       PetscDrawPixelToCoordinate_X,
    613:                                       PetscDrawPointPixel_X,
    614:                                       0};

    619: static PetscErrorCode PetscDrawGetSingleton_X(PetscDraw draw,PetscDraw *sdraw)
    620: {
    621:   PetscDraw_X    *Xwin = (PetscDraw_X*)draw->data,*sXwin;

    625:   PetscDrawCreate(PETSC_COMM_SELF,draw->display,draw->title,draw->x,draw->y,draw->w,draw->h,sdraw);
    626:   PetscObjectChangeTypeName((PetscObject)*sdraw,PETSC_DRAW_X);
    627:   PetscMemcpy((*sdraw)->ops,&DvOps,sizeof(DvOps));

    629:   if (draw->popup) {
    630:     PetscDrawGetSingleton(draw->popup,&(*sdraw)->popup);
    631:   }
    632:   (*sdraw)->pause   = draw->pause;
    633:   (*sdraw)->coor_xl = draw->coor_xl;
    634:   (*sdraw)->coor_xr = draw->coor_xr;
    635:   (*sdraw)->coor_yl = draw->coor_yl;
    636:   (*sdraw)->coor_yr = draw->coor_yr;
    637:   (*sdraw)->port_xl = draw->port_xl;
    638:   (*sdraw)->port_xr = draw->port_xr;
    639:   (*sdraw)->port_yl = draw->port_yl;
    640:   (*sdraw)->port_yr = draw->port_yr;

    642:   /* share drawables (windows and/or pixmap) from the parent draw */
    643:   PetscNewLog(*sdraw,&sXwin);
    644:   (*sdraw)->data = (void*)sXwin;
    645:   PetscDrawXiInit(sXwin,draw->display);
    646:   if (Xwin->win) {
    647:     PetscDrawXiQuickWindowFromWindow(sXwin,Xwin->win);
    648:     sXwin->drw = Xwin->drw; /* XXX If the window is ever resized, this is wrong! */
    649:   } else if (Xwin->drw) {
    650:     PetscDrawXiColormap(sXwin);
    651:     sXwin->drw = Xwin->drw;
    652:   }
    653:   PetscDrawXiGetGeometry(sXwin,&sXwin->x,&sXwin->y,&sXwin->w,&sXwin->h);
    654:   (*sdraw)->x = sXwin->x; (*sdraw)->y = sXwin->y;
    655:   (*sdraw)->w = sXwin->w; (*sdraw)->h = sXwin->h;
    656:   return(0);
    657: }

    661: static PetscErrorCode PetscDrawRestoreSingleton_X(PetscDraw draw,PetscDraw *sdraw)
    662: {

    666:   if (draw->popup && (*sdraw)->popup) {
    667:     PetscBool isdrawx;
    668:     PetscDraw_X *pXwin = (PetscDraw_X*)draw->popup->data;
    669:     PetscDraw_X *sXwin = (PetscDraw_X*)(*sdraw)->popup->data;
    670:     PetscObjectTypeCompare((PetscObject)draw->popup,PETSC_DRAW_X,&isdrawx);
    671:     if (!isdrawx) goto finally;
    672:     PetscObjectTypeCompare((PetscObject)(*sdraw)->popup,PETSC_DRAW_X,&isdrawx);
    673:     if (!isdrawx) goto finally;
    674:     if (sXwin->win == pXwin->win) {
    675:       PetscDrawRestoreSingleton(draw->popup,&(*sdraw)->popup);
    676:     }
    677:   }
    678: finally:
    679:   PetscDrawDestroy(sdraw);
    680:   return(0);
    681: }

    685: static PetscErrorCode PetscDrawXGetDisplaySize_Private(const char name[],int *width,int *height)
    686: {
    687:   Display *display;

    690:   display = XOpenDisplay(name);
    691:   if (!display) {
    692:     *width  = *height = 0;
    693:     SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Unable to open display on %s\n\
    694:     Make sure your COMPUTE NODES are authorized to connect\n\
    695:     to this X server and either your DISPLAY variable\n\
    696:     is set or you use the -display name option\n",name);
    697:   }
    698:   *width  = (int)DisplayWidth(display,DefaultScreen(display));
    699:   *height = (int)DisplayHeight(display,DefaultScreen(display));
    700:   XCloseDisplay(display);
    701:   return(0);
    702: }

    704: /*MC
    705:      PETSC_DRAW_X  - PETSc graphics device that uses either X windows or its virtual version Xvfb

    707:    Options Database Keys:
    708: +  -display <display> - sets the display to use
    709: .  -x_virtual - forces use of a X virtual display Xvfb that will not display anything but -draw_save will still work.
    710:                 Xvfb is automatically started up in PetscSetDisplay() with this option
    711: .  -draw_size w,h - percentage of screeen (either 1, .5, .3, .25), or size in pixels
    712: .  -geometry x,y,w,h - set location and size in pixels
    713: .  -draw_virtual - do not open a window (draw on a pixmap), -draw_save will still work
    714: -  -draw_double_buffer - avoid window flickering (draw on pixmap and flush to window)

    716:    Level: beginner

    718: .seealso:  PetscDrawOpenX(), PetscDrawSetDisplay(), PetscDrawSetFromOptions()

    720: M*/

    724: PETSC_EXTERN PetscErrorCode PetscDrawCreate_X(PetscDraw draw)
    725: {
    726:   PetscDraw_X    *Xwin;
    728:   PetscMPIInt    rank;
    729:   int            x = draw->x,y = draw->y,w = draw->w,h = draw->h;
    730:   static int     xavailable = 0,yavailable = 0,ybottom = 0,xmax = 0,ymax = 0;
    731:   PetscBool      set,dvirtual = PETSC_FALSE,doublebuffer = PETSC_TRUE;
    732:   PetscInt       xywh[4],osize = 4,nsizes=2;
    733:   PetscReal      sizes[2] = {.3,.3};

    736:   /* get the display variable */
    737:   if (!draw->display) {
    738:     PetscMalloc1(256,&draw->display);
    739:     PetscGetDisplay(draw->display,256);
    740:   }

    742:   /* initialize the display size */
    743:   if (!xmax) {
    744:     PetscDrawXGetDisplaySize_Private(draw->display,&xmax,&ymax);
    745:     /* if some processors fail on this and others succed then this is a problem ! */
    746:     if (ierr) {
    747:       (*PetscErrorPrintf)("PETSc unable to use X windows\nproceeding without graphics\n");
    748:       PetscDrawSetType(draw,PETSC_DRAW_NULL);
    749:       return(0);
    750:     }
    751:   }

    753:   /* allow user to set size of drawable */
    754:   PetscOptionsGetRealArray(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-draw_size",sizes,&nsizes,&set);
    755:   if (set && nsizes == 1 && sizes[0] > 1.0) sizes[1] = sizes[0];
    756:   if (set) {
    757:     if (sizes[0] > 1.0)       w = (int)sizes[0];
    758:     else if (sizes[0] == 1.0) w = PETSC_DRAW_FULL_SIZE;
    759:     else if (sizes[0] == .5)  w = PETSC_DRAW_HALF_SIZE;
    760:     else if (sizes[0] == .3)  w = PETSC_DRAW_THIRD_SIZE;
    761:     else if (sizes[0] == .25) w = PETSC_DRAW_QUARTER_SIZE;
    762:     if (sizes[1] > 1.0)       h = (int)sizes[1];
    763:     else if (sizes[1] == 1.0) h = PETSC_DRAW_FULL_SIZE;
    764:     else if (sizes[1] == .5)  h = PETSC_DRAW_HALF_SIZE;
    765:     else if (sizes[1] == .3)  h = PETSC_DRAW_THIRD_SIZE;
    766:     else if (sizes[1] == .25) h = PETSC_DRAW_QUARTER_SIZE;
    767:   }
    768:   if (w == PETSC_DECIDE || w == PETSC_DEFAULT) w = draw->w = 300;
    769:   if (h == PETSC_DECIDE || h == PETSC_DEFAULT) h = draw->h = 300;
    770:   switch (w) {
    771:   case PETSC_DRAW_FULL_SIZE:    w = draw->w = (xmax - 10);   break;
    772:   case PETSC_DRAW_HALF_SIZE:    w = draw->w = (xmax - 20)/2; break;
    773:   case PETSC_DRAW_THIRD_SIZE:   w = draw->w = (xmax - 30)/3; break;
    774:   case PETSC_DRAW_QUARTER_SIZE: w = draw->w = (xmax - 40)/4; break;
    775:   }
    776:   switch (h) {
    777:   case PETSC_DRAW_FULL_SIZE:    h = draw->h = (ymax - 10);   break;
    778:   case PETSC_DRAW_HALF_SIZE:    h = draw->h = (ymax - 20)/2; break;
    779:   case PETSC_DRAW_THIRD_SIZE:   h = draw->h = (ymax - 30)/3; break;
    780:   case PETSC_DRAW_QUARTER_SIZE: h = draw->h = (ymax - 40)/4; break;
    781:   }

    783:   PetscOptionsGetBool(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-draw_virtual",&dvirtual,NULL);

    785:   if (!dvirtual) {

    787:     /* allow user to set location and size of window */
    788:     xywh[0] = x; xywh[1] = y; xywh[2] = w; xywh[3] = h;
    789:     PetscOptionsGetIntArray(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-geometry",xywh,&osize,NULL);
    790:     x = (int)xywh[0]; y = (int)xywh[1]; w = (int)xywh[2]; h = (int)xywh[3];
    791:     if (w == PETSC_DECIDE || w == PETSC_DEFAULT) w = 300;
    792:     if (h == PETSC_DECIDE || h == PETSC_DEFAULT) h = 300;
    793:     draw->x = x; draw->y = y; draw->w = w; draw->h = h;

    795:     if (draw->x == PETSC_DECIDE || draw->y == PETSC_DECIDE) {
    796:       /*
    797:        PETSc tries to place windows starting in the upper left corner
    798:         and moving across to the right.

    800:        +0,0-------------------------------------------+
    801:        |  Region used so far  +xavailable,yavailable  |
    802:        |                      |                       |
    803:        |                      |                       |
    804:        +--------------------- +ybottom                |
    805:        |                                              |
    806:        |                                              |
    807:        +----------------------------------------------+xmax,ymax

    809:       */
    810:       /*  First: can we add it to the right? */
    811:       if (xavailable + w + 10 <= xmax) {
    812:         x       = xavailable;
    813:         y       = yavailable;
    814:         ybottom = PetscMax(ybottom,y + h + 30);
    815:       } else {
    816:         /* No, so add it below on the left */
    817:         xavailable = x = 0;
    818:         yavailable = y = ybottom;
    819:         ybottom    = ybottom + h + 30;
    820:       }
    821:     }
    822:     /* update available region */
    823:     xavailable = PetscMax(xavailable,x + w + 10);
    824:     if (xavailable >= xmax) {
    825:       xavailable = 0;
    826:       yavailable = yavailable + h + 30;
    827:       ybottom    = yavailable;
    828:     }
    829:     if (yavailable >= ymax) {
    830:       y          = 0;
    831:       yavailable = 0;
    832:       ybottom    = 0;
    833:     }

    835:   } /* endif(!dvirtual) */

    837:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
    838:   if (!rank && (w <= 0 || h <= 0)) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Negative window width or height");

    840:   PetscNewLog(draw,&Xwin);
    841:   PetscMemcpy(draw->ops,&DvOps,sizeof(DvOps));
    842:   draw->data = (void*)Xwin;

    844:   PetscDrawXiInit(Xwin,draw->display);
    845:   if (!dvirtual) {
    846:     Xwin->x = x; Xwin->y = y;
    847:     Xwin->w = w; Xwin->h = h;
    848:     if (!rank) {PetscDrawXiQuickWindow(Xwin,draw->title,x,y,w,h);}
    849:     MPI_Bcast(&Xwin->win,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
    850:     if (rank) {PetscDrawXiQuickWindowFromWindow(Xwin,Xwin->win);}
    851:   } else {
    852:     Xwin->x = 0; Xwin->y = 0;
    853:     Xwin->w = w; Xwin->h = h;
    854:     PetscDrawXiColormap(Xwin);
    855:     if (!rank) {PetscDrawXiQuickPixmap(Xwin);}
    856:     MPI_Bcast(&Xwin->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
    857:   }
    858:   PetscDrawXiGetGeometry(Xwin,&Xwin->x,&Xwin->y,&Xwin->w,&Xwin->h);
    859:   draw->x = Xwin->x; draw->y = Xwin->y;
    860:   draw->w = Xwin->w; draw->h = Xwin->h;

    862:   PetscOptionsGetBool(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-draw_double_buffer",&doublebuffer,NULL);
    863:   if (doublebuffer) {PetscDrawSetDoubleBuffer(draw);}
    864:   return(0);
    865: }