Actual source code: xops.c

      1: /*
      2:     Defines the operations for the X PetscDraw implementation.
      3: */

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

      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))

     17: static PetscErrorCode PetscDrawSetViewport_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr)
     18: {
     19:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
     20:   int            xa,ya,xb,yb,xmax = XiWin->w-1,ymax = XiWin->h-1;
     21:   XRectangle     box;

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

     35: static PetscErrorCode PetscDrawCoordinateToPixel_X(PetscDraw draw,PetscReal x,PetscReal y,int *i,int *j)
     36: {
     37:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;

     40:   *i = XTRANS(draw,XiWin,x);
     41:   *j = YTRANS(draw,XiWin,y);
     42:   return(0);
     43: }

     45: static PetscErrorCode PetscDrawPixelToCoordinate_X(PetscDraw draw,int i,int j,PetscReal *x,PetscReal *y)
     46: {
     47:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;

     50:   *x = ITRANS(draw,XiWin,i);
     51:   *y = JTRANS(draw,XiWin,j);
     52:   return(0);
     53: }

     55: static PetscErrorCode PetscDrawPoint_X(PetscDraw draw,PetscReal x,PetscReal y,int c)
     56: {
     57:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
     58:   int         xx,yy,i,j;

     61:   xx = XTRANS(draw,XiWin,x);
     62:   yy = YTRANS(draw,XiWin,y);
     63:   PetscDrawXiSetColor(XiWin,c);
     64:   for (i=-1; i<2; i++) {
     65:     for (j=-1; j<2; j++) {
     66:       XDrawPoint(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xx+i,yy+j);
     67:     }
     68:   }
     69:   return(0);
     70: }

     72: static PetscErrorCode PetscDrawPointPixel_X(PetscDraw draw,int x,int y,int c)
     73: {
     74:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;

     77:   PetscDrawXiSetColor(XiWin,c);
     78:   XDrawPoint(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x,y);
     79:   return(0);
     80: }

     82: static PetscErrorCode PetscDrawLine_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr,int cl)
     83: {
     84:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
     85:   int         x_1,y_1,x_2,y_2;

     88:   PetscDrawXiSetColor(XiWin,cl);
     89:   x_1 = XTRANS(draw,XiWin,xl); x_2  = XTRANS(draw,XiWin,xr);
     90:   y_1 = YTRANS(draw,XiWin,yl); y_2  = YTRANS(draw,XiWin,yr);
     91:   XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_1,y_1,x_2,y_2);
     92:   return(0);
     93: }

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

    101:   PetscDrawXiSetColor(XiWin,cl);
    102:   x_1 = XTRANS(draw,XiWin,xl); x_2 = XTRANS(draw,XiWin,xr);
    103:   y_1 = YTRANS(draw,XiWin,yl); y_2 = YTRANS(draw,XiWin,yr);
    104:   XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_1,y_1,x_2,y_2);
    105:   if (x_1 == x_2 && y_1 == y_2) return(0);
    106:   if (x_1 == x_2 && PetscAbs(y_1 - y_2) > 7) {
    107:     if (y_2 > y_1) {
    108:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2-3,y_2-3);
    109:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2-3);
    110:     } else {
    111:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2-3,y_2+3);
    112:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2+3);
    113:     }
    114:   }
    115:   if (y_1 == y_2 && PetscAbs(x_1 - x_2) > 7) {
    116:     if (x_2 > x_1) {
    117:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2-3,y_2-3,x_2,y_2);
    118:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2-3,y_2+3,x_2,y_2);
    119:     } else {
    120:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2-3);
    121:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2+3);
    122:     }
    123:   }
    124:   return(0);
    125: }

    127: static PetscErrorCode PetscDrawRectangle_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr,int c1,int c2,int c3,int c4)
    128: {
    129:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
    130:   int         x,y,w,h,c = (c1 + c2 + c3 + c4)/4;

    133:   PetscDrawXiSetColor(XiWin,c);
    134:   x = XTRANS(draw,XiWin,xl); w = XTRANS(draw,XiWin,xr) + 1 - x; if (w <= 0) w = 1;
    135:   y = YTRANS(draw,XiWin,yr); h = YTRANS(draw,XiWin,yl) + 1 - y; if (h <= 0) h = 1;
    136:   XFillRectangle(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x,y,w,h);
    137:   return(0);
    138: }

    140: static PetscErrorCode PetscDrawEllipse_X(PetscDraw draw,PetscReal x,PetscReal y,PetscReal a,PetscReal b,int c)
    141: {
    142:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
    143:   int         xA,yA,w,h;

    146:   PetscDrawXiSetColor(XiWin, c);
    147:   xA = XTRANS(draw,XiWin, x - a/2); w = XTRANS(draw,XiWin, x + a/2) + 1 - xA; w = PetscAbs(w);
    148:   yA = YTRANS(draw,XiWin, y + b/2); h = YTRANS(draw,XiWin, y - b/2) + 1 - yA; h = PetscAbs(h);
    149:   XFillArc(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xA,yA,w,h,0,360*64);
    150:   return(0);
    151: }

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

    155: 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)
    156: {
    157:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;

    161:   if (c1 == c2 && c2 == c3) {
    162:     XPoint pt[3];
    163:     PetscDrawXiSetColor(XiWin,c1);
    164:     pt[0].x = XTRANS(draw,XiWin,X1);
    165:     pt[0].y = YTRANS(draw,XiWin,Y_1);
    166:     pt[1].x = XTRANS(draw,XiWin,X2);
    167:     pt[1].y = YTRANS(draw,XiWin,Y2);
    168:     pt[2].x = XTRANS(draw,XiWin,X3);
    169:     pt[2].y = YTRANS(draw,XiWin,Y3);
    170:     XFillPolygon(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,pt,3,Convex,CoordModeOrigin);
    171:   } else {
    172:     int x1,y_1,x2,y2,x3,y3;
    173:     x1   = XTRANS(draw,XiWin,X1);
    174:     y_1  = YTRANS(draw,XiWin,Y_1);
    175:     x2   = XTRANS(draw,XiWin,X2);
    176:     y2   = YTRANS(draw,XiWin,Y2);
    177:     x3   = XTRANS(draw,XiWin,X3);
    178:     y3   = YTRANS(draw,XiWin,Y3);
    179:     PetscDrawInterpolatedTriangle_X(XiWin,x1,y_1,c1,x2,y2,c2,x3,y3,c3);
    180:   }
    181:   return(0);
    182: }

    184: static PetscErrorCode PetscDrawStringSetSize_X(PetscDraw draw,PetscReal x,PetscReal y)
    185: {
    186:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
    187:   int            w,h;

    191:   w    = (int)((XiWin->w)*x*(draw->port_xr - draw->port_xl)/(draw->coor_xr - draw->coor_xl));
    192:   h    = (int)((XiWin->h)*y*(draw->port_yr - draw->port_yl)/(draw->coor_yr - draw->coor_yl));
    193:   PetscFree(XiWin->font);
    194:   PetscDrawXiFontFixed(XiWin,w,h,&XiWin->font);
    195:   return(0);
    196: }

    198: static PetscErrorCode PetscDrawStringGetSize_X(PetscDraw draw,PetscReal *x,PetscReal  *y)
    199: {
    200:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
    201:   PetscReal   w,h;

    204:   w = XiWin->font->font_w; h = XiWin->font->font_h;
    205:   if (x) *x = w*(draw->coor_xr - draw->coor_xl)/((XiWin->w)*(draw->port_xr - draw->port_xl));
    206:   if (y) *y = h*(draw->coor_yr - draw->coor_yl)/((XiWin->h)*(draw->port_yr - draw->port_yl));
    207:   return(0);
    208: }

    210: static PetscErrorCode PetscDrawString_X(PetscDraw draw,PetscReal x,PetscReal y,int c,const char chrs[])
    211: {
    212:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
    213:   int            xx,yy,descent = XiWin->font->font_descent;
    214:   size_t         len;
    215:   char           *substr;
    216:   PetscToken     token;

    220:   xx = XTRANS(draw,XiWin,x);
    221:   yy = YTRANS(draw,XiWin,y);
    222:   PetscDrawXiSetColor(XiWin,c);

    224:   PetscTokenCreate(chrs,'\n',&token);
    225:   PetscTokenFind(token,&substr);
    226:   while (substr) {
    227:     PetscStrlen(substr,&len);
    228:     XDrawString(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xx,yy-descent,substr,len);
    229:     yy  += XiWin->font->font_h;
    230:     PetscTokenFind(token,&substr);
    231:   }
    232:   PetscTokenDestroy(&token);
    233:   return(0);
    234: }

    236: static PetscErrorCode PetscDrawStringVertical_X(PetscDraw draw,PetscReal x,PetscReal y,int c,const char text[])
    237: {
    238:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
    239:   int            xx,yy,offset = XiWin->font->font_h - XiWin->font->font_descent;
    240:   char           chr[2] = {0, 0};

    243:   xx = XTRANS(draw,XiWin,x);
    244:   yy = YTRANS(draw,XiWin,y);
    245:   PetscDrawXiSetColor(XiWin,c);
    246:   while ((chr[0] = *text++)) {
    247:     XDrawString(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xx,yy+offset,chr,1);
    248:     yy += XiWin->font->font_h;
    249:   }
    250:   return(0);
    251: }

    253: static PetscErrorCode PetscDrawFlush_X(PetscDraw draw)
    254: {
    255:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
    256:   PetscMPIInt    rank;

    260:   /* make sure the X server processed requests from all processes */
    261:   PetscDrawCollectiveBegin(draw);
    262:   XSync(XiWin->disp,False);
    263:   PetscDrawCollectiveEnd(draw);
    264:   MPI_Barrier(PetscObjectComm((PetscObject)draw));

    266:   /* transfer pixmap contents to window (only the first process does this) */
    267:   if (XiWin->drw && XiWin->win) {
    268:     MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
    269:     PetscDrawCollectiveBegin(draw);
    270:     if (!rank) XCopyArea(XiWin->disp,XiWin->drw,XiWin->win,XiWin->gc.set,0,0,XiWin->w,XiWin->h,0,0);
    271:     if (!rank) XSync(XiWin->disp,False);
    272:     PetscDrawCollectiveEnd(draw);
    273:     MPI_Barrier(PetscObjectComm((PetscObject)draw));
    274:   }
    275:   return(0);
    276: }

    278: static PetscErrorCode PetscDrawClear_X(PetscDraw draw)
    279: {
    280:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
    281:   int            xmax = XiWin->w-1,  ymax = XiWin->h-1;
    282:   PetscReal      xl = draw->port_xl, yl = draw->port_yl;
    283:   PetscReal      xr = draw->port_xr, yr = draw->port_yr;
    284:   PetscMPIInt    rank;

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

    294:   /* only the first process handles the clearing business */
    295:   PetscDrawCollectiveBegin(draw);
    296:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
    297:   if (!rank) {
    298:     int xa = (int)(xl*xmax), ya = ymax - (int)(yr*ymax);
    299:     int xb = (int)(xr*xmax), yb = ymax - (int)(yl*ymax);
    300:     unsigned int w = (unsigned int)(xb + 1 - xa);
    301:     unsigned int h = (unsigned int)(yb + 1 - ya);
    302:     PetscDrawXiSetPixVal(XiWin,XiWin->background);
    303:     XFillRectangle(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xa,ya,w,h);
    304:     XSync(XiWin->disp,False);
    305:   }
    306:   PetscDrawCollectiveEnd(draw);
    307:   MPI_Barrier(PetscObjectComm((PetscObject)draw));
    308:   return(0);
    309: }

    311: static PetscErrorCode PetscDrawSetDoubleBuffer_X(PetscDraw draw)
    312: {
    313:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    314:   PetscMPIInt    rank;

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

    321:   PetscDrawCollectiveBegin(draw);
    322:   if (!rank) {PetscDrawXiQuickPixmap(win);}
    323:   PetscDrawCollectiveEnd(draw);
    324:   MPI_Bcast(&win->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
    325:   return(0);
    326: }

    328: static PetscErrorCode PetscDrawGetPopup_X(PetscDraw draw,PetscDraw *popup)
    329: {
    330:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    331:   PetscBool      flg  = PETSC_TRUE;

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

    338:   PetscDrawCreate(PetscObjectComm((PetscObject)draw),draw->display,NULL,win->x,win->y+win->h+10,220,220,popup);
    339:   PetscObjectSetOptionsPrefix((PetscObject)*popup,"popup_");
    340:   PetscObjectAppendOptionsPrefix((PetscObject)*popup,((PetscObject)draw)->prefix);
    341:   PetscDrawSetType(*popup,PETSC_DRAW_X);
    342:   draw->popup = *popup;
    343:   return(0);
    344: }

    346: static PetscErrorCode PetscDrawSetTitle_X(PetscDraw draw,const char title[])
    347: {
    348:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    349:   PetscMPIInt    rank;

    353:   if (!win->win) return(0);
    354:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
    355:   PetscDrawCollectiveBegin(draw);
    356:   if (!rank) {
    357:     size_t        len;
    358:     XTextProperty prop;
    359:     PetscStrlen(title,&len);
    360:     XGetWMName(win->disp,win->win,&prop);
    361:     XFree((void*)prop.value);
    362:     prop.value  = (unsigned char*)title;
    363:     prop.nitems = (long)len;
    364:     XSetWMName(win->disp,win->win,&prop);
    365:   }
    366:   PetscDrawCollectiveEnd(draw);
    367:   return(0);
    368: }

    370: static PetscErrorCode PetscDrawCheckResizedWindow_X(PetscDraw draw)
    371: {
    372:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    373:   int            xywh[4];
    374:   PetscMPIInt    rank;

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

    381:   PetscDrawCollectiveBegin(draw);
    382:   if (!rank) {PetscDrawXiGetGeometry(win,xywh,xywh+1,xywh+2,xywh+3);}
    383:   PetscDrawCollectiveEnd(draw);
    384:   MPI_Bcast(xywh,4,MPI_INT,0,PetscObjectComm((PetscObject)draw));

    386:   /* record new window position */
    387:   draw->x = win->x = xywh[0];
    388:   draw->y = win->y = xywh[1];
    389:   if (xywh[2] == win->w && xywh[3] == win->h) return(0);
    390:   /* record new window sizes */
    391:   draw->w = win->w = xywh[2];
    392:   draw->h = win->h = xywh[3];

    394:   /* recreate pixmap (only first processor does this) */
    395:   PetscDrawCollectiveBegin(draw);
    396:   if (!rank && win->drw) {PetscDrawXiQuickPixmap(win);}
    397:   PetscDrawCollectiveEnd(draw);
    398:   MPI_Bcast(&win->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
    399:   /* reset the clipping */
    400:   PetscDrawSetViewport_X(draw,draw->port_xl,draw->port_yl,draw->port_xr,draw->port_yr);
    401:   return(0);
    402: }

    404: static PetscErrorCode PetscDrawResizeWindow_X(PetscDraw draw,int w,int h)
    405: {
    406:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    407:   PetscMPIInt    rank;

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

    414:   if (win->win) {
    415:     PetscDrawCollectiveBegin(draw);
    416:     if (!rank) {PetscDrawXiResizeWindow(win,w,h);}
    417:     PetscDrawCollectiveEnd(draw);
    418:     PetscDrawCheckResizedWindow_X(draw);
    419:   } else if (win->drw) {
    420:     draw->w = win->w = w; draw->h = win->h = h;
    421:     /* recreate pixmap (only first processor does this) */
    422:     PetscDrawCollectiveBegin(draw);
    423:     if (!rank) {PetscDrawXiQuickPixmap(win);}
    424:     MPI_Bcast(&win->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
    425:     /* reset the clipping */
    426:     PetscDrawCollectiveEnd(draw);
    427:     PetscDrawSetViewport_X(draw,draw->port_xl,draw->port_yl,draw->port_xr,draw->port_yr);
    428:   }
    429:   return(0);
    430: }

    432: #include <X11/cursorfont.h>

    434: static PetscErrorCode PetscDrawGetMouseButton_X(PetscDraw draw,PetscDrawButton *button,PetscReal *x_user,PetscReal *y_user,PetscReal *x_phys,PetscReal *y_phys)
    435: {
    436:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
    437:   Cursor         cursor;
    438:   XEvent         report;
    439:   Window         root,child;
    440:   int            root_x,root_y,px=0,py=0;
    441:   unsigned int   w,h,border,depth;
    442:   unsigned int   keys_button;
    443:   PetscMPIInt    rank;
    444:   PetscReal      xx,yy;

    448:   *button = PETSC_BUTTON_NONE;
    449:   if (!win->win) return(0);
    450:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

    452:   PetscDrawCollectiveBegin(draw);
    453:   if (rank) goto finally;

    455:   /* change cursor to indicate input */
    456:   cursor = XCreateFontCursor(win->disp,XC_hand2); if (!cursor) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Unable to create X cursor");
    457:   XDefineCursor(win->disp,win->win,cursor);
    458:   /* wait for mouse button events */
    459:   XSelectInput(win->disp,win->win,ButtonPressMask|ButtonReleaseMask);
    460:   while (XCheckTypedEvent(win->disp,ButtonPress,&report));
    461:   XMaskEvent(win->disp,ButtonReleaseMask,&report);
    462:   /* get mouse pointer coordinates */
    463:   XQueryPointer(win->disp,report.xmotion.window,&root,&child,&root_x,&root_y,&px,&py,&keys_button);
    464:   /* the user may resize the window before pressing the mouse button */
    465:   XGetGeometry(win->disp,win->win,&root,&root_x,&root_y,&w,&h,&border,&depth);
    466:   /* cleanup input event handler and cursor  */
    467:   XSelectInput(win->disp,win->win,NoEventMask);
    468:   XUndefineCursor(win->disp,win->win);
    469:   XFreeCursor(win->disp, cursor);
    470:   XSync(win->disp,False);

    472:   switch (report.xbutton.button) {
    473:   case Button1: *button = PETSC_BUTTON_LEFT; break;
    474:   case Button2: *button = PETSC_BUTTON_CENTER; break;
    475:   case Button3: *button = PETSC_BUTTON_RIGHT; break;
    476:   case Button4: *button = PETSC_BUTTON_WHEEL_UP; break;
    477:   case Button5: *button = PETSC_BUTTON_WHEEL_DOWN; break;
    478:   }
    479:   if (report.xbutton.state & ShiftMask) {
    480:     switch (report.xbutton.button) {
    481:     case Button1: *button = PETSC_BUTTON_LEFT_SHIFT; break;
    482:     case Button2: *button = PETSC_BUTTON_CENTER_SHIFT; break;
    483:     case Button3: *button = PETSC_BUTTON_RIGHT_SHIFT; break;
    484:     }
    485:   }
    486:   xx = ((PetscReal)px)/w;
    487:   yy = 1 - ((PetscReal)py)/h;
    488:   if (x_user) *x_user = draw->coor_xl + (xx - draw->port_xl)*(draw->coor_xr - draw->coor_xl)/(draw->port_xr - draw->port_xl);
    489:   if (y_user) *y_user = draw->coor_yl + (yy - draw->port_yl)*(draw->coor_yr - draw->coor_yl)/(draw->port_yr - draw->port_yl);
    490:   if (x_phys) *x_phys = xx;
    491:   if (y_phys) *y_phys = yy;

    493: finally:
    494:   PetscDrawCollectiveEnd(draw);
    495:   PetscDrawCheckResizedWindow_X(draw);
    496:   return(0);
    497: }

    499: static PetscErrorCode PetscDrawPause_X(PetscDraw draw)
    500: {
    501:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;

    505:   if (!win->win) return(0);
    506:   if (draw->pause > 0) PetscSleep(draw->pause);
    507:   else if (draw->pause == -1) {
    508:     PetscDrawButton button = PETSC_BUTTON_NONE;
    509:     PetscDrawGetMouseButton(draw,&button,NULL,NULL,NULL,NULL);
    510:     if (button == PETSC_BUTTON_CENTER) draw->pause = 0;
    511:   }
    512:   return(0);
    513: }

    515: static PetscErrorCode PetscDrawDestroy_X(PetscDraw draw)
    516: {
    517:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;

    521:   PetscDrawDestroy(&draw->popup);
    522:   PetscDrawXiClose(win);
    523:   PetscFree(draw->data);
    524:   return(0);
    525: }

    527: static       PetscErrorCode PetscDrawGetSingleton_X(PetscDraw,PetscDraw*);
    528: static       PetscErrorCode PetscDrawRestoreSingleton_X(PetscDraw,PetscDraw*);
    529: PETSC_INTERN PetscErrorCode PetscDrawGetImage_X(PetscDraw,unsigned char[][3],unsigned int*,unsigned int*,unsigned char*[]);

    531: static struct _PetscDrawOps DvOps = { PetscDrawSetDoubleBuffer_X,
    532:                                       PetscDrawFlush_X,
    533:                                       PetscDrawLine_X,
    534:                                       NULL,
    535:                                       NULL,
    536:                                       PetscDrawPoint_X,
    537:                                       NULL,
    538:                                       PetscDrawString_X,
    539:                                       PetscDrawStringVertical_X,
    540:                                       PetscDrawStringSetSize_X,
    541:                                       PetscDrawStringGetSize_X,
    542:                                       PetscDrawSetViewport_X,
    543:                                       PetscDrawClear_X,
    544:                                       PetscDrawRectangle_X,
    545:                                       PetscDrawTriangle_X,
    546:                                       PetscDrawEllipse_X,
    547:                                       PetscDrawGetMouseButton_X,
    548:                                       PetscDrawPause_X,
    549:                                       NULL,
    550:                                       NULL,
    551:                                       PetscDrawGetPopup_X,
    552:                                       PetscDrawSetTitle_X,
    553:                                       PetscDrawCheckResizedWindow_X,
    554:                                       PetscDrawResizeWindow_X,
    555:                                       PetscDrawDestroy_X,
    556:                                       NULL,
    557:                                       PetscDrawGetSingleton_X,
    558:                                       PetscDrawRestoreSingleton_X,
    559:                                       NULL,
    560:                                       PetscDrawGetImage_X,
    561:                                       NULL,
    562:                                       PetscDrawArrow_X,
    563:                                       PetscDrawCoordinateToPixel_X,
    564:                                       PetscDrawPixelToCoordinate_X,
    565:                                       PetscDrawPointPixel_X,
    566:                                       NULL};

    569: static PetscErrorCode PetscDrawGetSingleton_X(PetscDraw draw,PetscDraw *sdraw)
    570: {
    571:   PetscDraw_X    *Xwin = (PetscDraw_X*)draw->data,*sXwin;

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

    579:   if (draw->popup) {
    580:     PetscDrawGetSingleton(draw->popup,&(*sdraw)->popup);
    581:   }
    582:   (*sdraw)->pause   = draw->pause;
    583:   (*sdraw)->coor_xl = draw->coor_xl;
    584:   (*sdraw)->coor_xr = draw->coor_xr;
    585:   (*sdraw)->coor_yl = draw->coor_yl;
    586:   (*sdraw)->coor_yr = draw->coor_yr;
    587:   (*sdraw)->port_xl = draw->port_xl;
    588:   (*sdraw)->port_xr = draw->port_xr;
    589:   (*sdraw)->port_yl = draw->port_yl;
    590:   (*sdraw)->port_yr = draw->port_yr;

    592:   /* share drawables (windows and/or pixmap) from the parent draw */
    593:   PetscNewLog(*sdraw,&sXwin);
    594:   (*sdraw)->data = (void*)sXwin;
    595:   PetscDrawXiInit(sXwin,draw->display);
    596:   if (Xwin->win) {
    597:     PetscDrawXiQuickWindowFromWindow(sXwin,Xwin->win);
    598:     sXwin->drw = Xwin->drw; /* XXX If the window is ever resized, this is wrong! */
    599:   } else if (Xwin->drw) {
    600:     PetscDrawXiColormap(sXwin);
    601:     sXwin->drw = Xwin->drw;
    602:   }
    603:   PetscDrawXiGetGeometry(sXwin,&sXwin->x,&sXwin->y,&sXwin->w,&sXwin->h);
    604:   (*sdraw)->x = sXwin->x; (*sdraw)->y = sXwin->y;
    605:   (*sdraw)->w = sXwin->w; (*sdraw)->h = sXwin->h;
    606:   return(0);
    607: }

    609: static PetscErrorCode PetscDrawRestoreSingleton_X(PetscDraw draw,PetscDraw *sdraw)
    610: {

    614:   if (draw->popup && (*sdraw)->popup) {
    615:     PetscBool isdrawx;
    616:     PetscDraw_X *pXwin = (PetscDraw_X*)draw->popup->data;
    617:     PetscDraw_X *sXwin = (PetscDraw_X*)(*sdraw)->popup->data;
    618:     PetscObjectTypeCompare((PetscObject)draw->popup,PETSC_DRAW_X,&isdrawx);
    619:     if (!isdrawx) goto finally;
    620:     PetscObjectTypeCompare((PetscObject)(*sdraw)->popup,PETSC_DRAW_X,&isdrawx);
    621:     if (!isdrawx) goto finally;
    622:     if (sXwin->win == pXwin->win) {
    623:       PetscDrawRestoreSingleton(draw->popup,&(*sdraw)->popup);
    624:     }
    625:   }
    626: finally:
    627:   PetscDrawDestroy(sdraw);
    628:   return(0);
    629: }

    631: static PetscErrorCode PetscDrawXGetDisplaySize_Private(const char name[],int *width,int *height,PetscBool *has_display)
    632: {
    633:   Display *display;

    636:   display = XOpenDisplay(name);
    637:   if (!display) {
    638:     *width  = *height = 0;
    639:     (*PetscErrorPrintf)("Unable to open display on %s\n\
    640:     Make sure your COMPUTE NODES are authorized to connect\n\
    641:     to this X server and either your DISPLAY variable\n\
    642:     is set or you use the -display name option\n",name);
    643:     *has_display = PETSC_FALSE;
    644:     return(0);
    645:   }
    646:   *has_display = PETSC_TRUE;
    647:   *width  = (int)DisplayWidth(display,DefaultScreen(display));
    648:   *height = (int)DisplayHeight(display,DefaultScreen(display));
    649:   XCloseDisplay(display);
    650:   return(0);
    651: }

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

    656:    Options Database Keys:
    657: +  -display <display> - sets the display to use
    658: .  -x_virtual - forces use of a X virtual display Xvfb that will not display anything but -draw_save will still work.
    659:                 Xvfb is automatically started up in PetscSetDisplay() with this option
    660: .  -draw_size w,h - percentage of screen (either 1, .5, .3, .25), or size in pixels
    661: .  -geometry x,y,w,h - set location and size in pixels
    662: .  -draw_virtual - do not open a window (draw on a pixmap), -draw_save will still work
    663: -  -draw_double_buffer - avoid window flickering (draw on pixmap and flush to window)

    665:    Level: beginner

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

    669: M*/

    671: PETSC_EXTERN PetscErrorCode PetscDrawCreate_X(PetscDraw draw)
    672: {
    673:   PetscDraw_X    *Xwin;
    675:   PetscMPIInt    rank;
    676:   int            x = draw->x,y = draw->y,w = draw->w,h = draw->h;
    677:   static int     xavailable = 0,yavailable = 0,ybottom = 0,xmax = 0,ymax = 0;
    678:   PetscBool      set,dvirtual = PETSC_FALSE,doublebuffer = PETSC_TRUE,has_display;
    679:   PetscInt       xywh[4],osize = 4,nsizes=2;
    680:   PetscReal      sizes[2] = {.3,.3};
    681:   static size_t  DISPLAY_LENGTH = 265;

    684:   /* get the display variable */
    685:   if (!draw->display) {
    686:     PetscMalloc1(DISPLAY_LENGTH,&draw->display);
    687:     PetscGetDisplay(draw->display,DISPLAY_LENGTH);
    688:   }

    690:   /* initialize the display size */
    691:   if (!xmax) {
    692:     PetscDrawXGetDisplaySize_Private(draw->display,&xmax,&ymax,&has_display);
    693:     /* if some processors fail on this and others succed then this is a problem ! */
    694:     if (!has_display) {
    695:       (*PetscErrorPrintf)("PETSc unable to use X windows\nproceeding without graphics\n");
    696:       PetscDrawSetType(draw,PETSC_DRAW_NULL);
    697:       return(0);
    698:     }
    699:   }

    701:   /* allow user to set size of drawable */
    702:   PetscOptionsGetRealArray(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-draw_size",sizes,&nsizes,&set);
    703:   if (set && nsizes == 1 && sizes[0] > 1.0) sizes[1] = sizes[0];
    704:   if (set) {
    705:     if (sizes[0] > 1.0)       w = (int)sizes[0];
    706:     else if (sizes[0] == 1.0) w = PETSC_DRAW_FULL_SIZE;
    707:     else if (sizes[0] == .5)  w = PETSC_DRAW_HALF_SIZE;
    708:     else if (sizes[0] == .3)  w = PETSC_DRAW_THIRD_SIZE;
    709:     else if (sizes[0] == .25) w = PETSC_DRAW_QUARTER_SIZE;
    710:     if (sizes[1] > 1.0)       h = (int)sizes[1];
    711:     else if (sizes[1] == 1.0) h = PETSC_DRAW_FULL_SIZE;
    712:     else if (sizes[1] == .5)  h = PETSC_DRAW_HALF_SIZE;
    713:     else if (sizes[1] == .3)  h = PETSC_DRAW_THIRD_SIZE;
    714:     else if (sizes[1] == .25) h = PETSC_DRAW_QUARTER_SIZE;
    715:   }
    716:   if (w == PETSC_DECIDE || w == PETSC_DEFAULT) w = draw->w = 300;
    717:   if (h == PETSC_DECIDE || h == PETSC_DEFAULT) h = draw->h = 300;
    718:   switch (w) {
    719:   case PETSC_DRAW_FULL_SIZE:    w = draw->w = (xmax - 10);   break;
    720:   case PETSC_DRAW_HALF_SIZE:    w = draw->w = (xmax - 20)/2; break;
    721:   case PETSC_DRAW_THIRD_SIZE:   w = draw->w = (xmax - 30)/3; break;
    722:   case PETSC_DRAW_QUARTER_SIZE: w = draw->w = (xmax - 40)/4; break;
    723:   }
    724:   switch (h) {
    725:   case PETSC_DRAW_FULL_SIZE:    h = draw->h = (ymax - 10);   break;
    726:   case PETSC_DRAW_HALF_SIZE:    h = draw->h = (ymax - 20)/2; break;
    727:   case PETSC_DRAW_THIRD_SIZE:   h = draw->h = (ymax - 30)/3; break;
    728:   case PETSC_DRAW_QUARTER_SIZE: h = draw->h = (ymax - 40)/4; break;
    729:   }

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

    733:   if (!dvirtual) {

    735:     /* allow user to set location and size of window */
    736:     xywh[0] = x; xywh[1] = y; xywh[2] = w; xywh[3] = h;
    737:     PetscOptionsGetIntArray(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-geometry",xywh,&osize,NULL);
    738:     x = (int)xywh[0]; y = (int)xywh[1]; w = (int)xywh[2]; h = (int)xywh[3];
    739:     if (w == PETSC_DECIDE || w == PETSC_DEFAULT) w = 300;
    740:     if (h == PETSC_DECIDE || h == PETSC_DEFAULT) h = 300;
    741:     draw->x = x; draw->y = y; draw->w = w; draw->h = h;

    743:     if (draw->x == PETSC_DECIDE || draw->y == PETSC_DECIDE) {
    744:       /*
    745:        PETSc tries to place windows starting in the upper left corner
    746:         and moving across to the right.

    748:        +0,0-------------------------------------------+
    749:        |  Region used so far  +xavailable,yavailable  |
    750:        |                      |                       |
    751:        |                      |                       |
    752:        +--------------------- +ybottom                |
    753:        |                                              |
    754:        |                                              |
    755:        +----------------------------------------------+xmax,ymax

    757:       */
    758:       /*  First: can we add it to the right? */
    759:       if (xavailable + w + 10 <= xmax) {
    760:         x       = xavailable;
    761:         y       = yavailable;
    762:         ybottom = PetscMax(ybottom,y + h + 30);
    763:       } else {
    764:         /* No, so add it below on the left */
    765:         xavailable = x = 0;
    766:         yavailable = y = ybottom;
    767:         ybottom    = ybottom + h + 30;
    768:       }
    769:     }
    770:     /* update available region */
    771:     xavailable = PetscMax(xavailable,x + w + 10);
    772:     if (xavailable >= xmax) {
    773:       xavailable = 0;
    774:       yavailable = yavailable + h + 30;
    775:       ybottom    = yavailable;
    776:     }
    777:     if (yavailable >= ymax) {
    778:       y          = 0;
    779:       yavailable = 0;
    780:       ybottom    = 0;
    781:     }

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

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

    788:   PetscNewLog(draw,&Xwin);
    789:   PetscMemcpy(draw->ops,&DvOps,sizeof(DvOps));
    790:   draw->data = (void*)Xwin;

    792:   PetscDrawXiInit(Xwin,draw->display);
    793:   if (!dvirtual) {
    794:     Xwin->x = x; Xwin->y = y;
    795:     Xwin->w = w; Xwin->h = h;
    796:     if (!rank) {PetscDrawXiQuickWindow(Xwin,draw->title,x,y,w,h);}
    797:     MPI_Bcast(&Xwin->win,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
    798:     if (rank) {PetscDrawXiQuickWindowFromWindow(Xwin,Xwin->win);}
    799:   } else {
    800:     Xwin->x = 0; Xwin->y = 0;
    801:     Xwin->w = w; Xwin->h = h;
    802:     PetscDrawXiColormap(Xwin);
    803:     if (!rank) {PetscDrawXiQuickPixmap(Xwin);}
    804:     MPI_Bcast(&Xwin->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
    805:   }
    806:   PetscDrawXiGetGeometry(Xwin,&Xwin->x,&Xwin->y,&Xwin->w,&Xwin->h);
    807:   draw->x = Xwin->x; draw->y = Xwin->y;
    808:   draw->w = Xwin->w; draw->h = Xwin->h;

    810:   PetscOptionsGetBool(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-draw_double_buffer",&doublebuffer,NULL);
    811:   if (doublebuffer) {PetscDrawSetDoubleBuffer(draw);}
    812:   return(0);
    813: }