Actual source code: xinit.c
petsc-3.10.5 2019-03-28
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      2: /*
      3:    This file contains routines to open an X window display and window
      4:    This consists of a number of routines that set the various
      5:    fields in the Window structure, which is passed to
      6:    all of these routines.

      8:    Note that if you use the default visual and colormap, then you
      9:    can use these routines with any X toolkit that will give you the
     10:    Window id of the window that it is managing.  Use that instead of the
     11:    call to PetscDrawXiCreateWindow .  Similarly for the Display.
     12: */

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

     16: PETSC_INTERN PetscErrorCode PetscDrawSetColormap_X(PetscDraw_X*,Colormap);

     18: /*
     19:   PetscDrawXiOpenDisplay - Open and setup a display
     20: */
     21: static PetscErrorCode PetscDrawXiOpenDisplay(PetscDraw_X *XiWin,const char display[])
     22: {
     24:   XiWin->disp = XOpenDisplay(display);
     25:   if (!XiWin->disp) {
     26:     SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Unable to open display on %s\n\
     27:     Make sure your COMPUTE NODES are authorized to connect \n\
     28:     to this X server and either your DISPLAY variable\n\
     29:     is set or you use the -display name option\n",display);
     30:   }
     31:   XiWin->screen     = DefaultScreen(XiWin->disp);
     32:   XiWin->vis        = DefaultVisual(XiWin->disp,XiWin->screen);
     33:   XiWin->depth      = DefaultDepth(XiWin->disp,XiWin->screen);
     34:   XiWin->cmap       = DefaultColormap(XiWin->disp,XiWin->screen);
     35:   XiWin->background = WhitePixel(XiWin->disp,XiWin->screen);
     36:   XiWin->foreground = BlackPixel(XiWin->disp,XiWin->screen);
     37:   return(0);
     38: }

     40: PetscErrorCode PetscDrawXiClose(PetscDraw_X *XiWin)
     41: {

     45:   if (!XiWin) return(0);
     46:   PetscFree(XiWin->font);
     47:   if (XiWin->disp) {
     48: #if defined(PETSC_HAVE_SETJMP_H)
     49:     jmp_buf              jmpbuf;
     50:     PetscXIOErrorHandler xioerrhdl;
     51:     PetscMemcpy(&jmpbuf,&PetscXIOErrorHandlerJumpBuf,sizeof(jmpbuf));
     52:     xioerrhdl = PetscSetXIOErrorHandler(PetscXIOErrorHandlerJump);
     53:     if (!setjmp(PetscXIOErrorHandlerJumpBuf))
     54: #endif
     55:     {
     56:       XFreeGC(XiWin->disp,XiWin->gc.set);
     57:       XCloseDisplay(XiWin->disp);
     58:     }
     59:     XiWin->disp = NULL;
     60: #if defined(PETSC_HAVE_SETJMP_H)
     61:     (void)PetscSetXIOErrorHandler(xioerrhdl);
     62:     PetscMemcpy(&PetscXIOErrorHandlerJumpBuf,&jmpbuf,sizeof(jmpbuf));
     63: #endif
     64:   }
     65:   return(0);
     66: }

     68: /*
     69:    PetscDrawXiCreateGC - setup the GC structure
     70: */
     71: static PetscErrorCode PetscDrawXiCreateGC(PetscDraw_X *XiWin,PetscDrawXiPixVal fg)
     72: {
     73:   XGCValues gcvalues;             /* window graphics context values */

     76:   /* Set the graphics contexts */
     77:   /* create a gc for the ROP_SET operation (writing the fg value to a pixel) */
     78:   /* (do this with function GXcopy; GXset will automatically write 1) */
     79:   gcvalues.function   = GXcopy;
     80:   gcvalues.foreground = fg;
     81:   XiWin->gc.cur_pix   = fg;
     82:   XiWin->gc.set       = XCreateGC(XiWin->disp,RootWindow(XiWin->disp,XiWin->screen),GCFunction|GCForeground,&gcvalues);
     83:   if (!XiWin->gc.set) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Unable to create X graphics context");
     84:   return(0);
     85: }

     87: /*
     88:    PetscDrawXiInit - basic setup the draw (display, graphics context, font)
     89: */
     90: PetscErrorCode PetscDrawXiInit(PetscDraw_X *XiWin,const char display[])
     91: {
     94:   PetscDrawXiOpenDisplay(XiWin,display);
     95:   PetscDrawXiCreateGC(XiWin,XiWin->foreground);
     96:   PetscDrawXiFontFixed(XiWin,6,10,&XiWin->font);
     97:   return(0);
     98: }

    100: /*
    101:     This routine waits until the window is actually created or destroyed
    102:     Returns 0 if window is mapped; 1 if window is destroyed.
    103:  */
    104: static PetscErrorCode PetscDrawXiWaitMap(PetscDraw_X *XiWin)
    105: {
    106:   XEvent event;

    109:   while (1) {
    110:     XMaskEvent(XiWin->disp,ExposureMask|StructureNotifyMask,&event);
    111:     if (event.xany.window != XiWin->win) break;
    112:     else {
    113:       switch (event.type) {
    114:       case ConfigureNotify:
    115:         /* window has been moved or resized */
    116:         XiWin->w = event.xconfigure.width  - 2 * event.xconfigure.border_width;
    117:         XiWin->h = event.xconfigure.height - 2 * event.xconfigure.border_width;
    118:         break;
    119:       case DestroyNotify:
    120:         PetscFunctionReturn(1);
    121:       case Expose:
    122:         return(0);
    123:         /* else ignore event */
    124:       }
    125:     }
    126:   }
    127:   return(0);
    128: }

    130: /*
    131:     Actually display a window at [x,y] with sizes (w,h)
    132: */
    133: static PetscErrorCode PetscDrawXiDisplayWindow(PetscDraw_X *XiWin,char *label,int x,int y,int w,int h)
    134: {
    135:   unsigned int         wavail,havail;
    136:   XSizeHints           size_hints;
    137:   XWindowAttributes    in_window_attributes;
    138:   XSetWindowAttributes window_attributes;
    139:   unsigned int         border_width = 0;
    140:   unsigned long        backgnd_pixel = WhitePixel(XiWin->disp,XiWin->screen);
    141:   unsigned long        wmask;

    144:   /* get the available widths */
    145:   wavail = DisplayWidth(XiWin->disp,XiWin->screen);
    146:   havail = DisplayHeight(XiWin->disp,XiWin->screen);
    147:   if (w <= 0 || h <= 0) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"X Window display has invalid height or width");
    148:   if ((unsigned int)w > wavail) w = wavail;
    149:   if ((unsigned int)h > havail) h = havail;

    151:   if (x < 0) x = (int)(wavail - (unsigned int)w + (unsigned int)x);
    152:   if (y < 0) y = (int)(havail - (unsigned int)h + (unsigned int)y);
    153:   x = ((unsigned int)x + w > wavail) ? (int)(wavail - (unsigned int)w) : x;
    154:   y = ((unsigned int)y + h > havail) ? (int)(havail - (unsigned int)h) : y;

    156:   /* We need XCreateWindow since we may need an visual other than the default one */
    157:   XGetWindowAttributes(XiWin->disp,RootWindow(XiWin->disp,XiWin->screen),&in_window_attributes);
    158:   window_attributes.background_pixmap = None;
    159:   window_attributes.background_pixel  = backgnd_pixel;
    160:   /* No border for now */
    161:   window_attributes.border_pixmap     = None;
    162:   /*
    163:   window_attributes.border_pixel      = border_pixel;
    164:   */
    165:   window_attributes.bit_gravity       = in_window_attributes.bit_gravity;
    166:   window_attributes.win_gravity       = in_window_attributes.win_gravity;
    167:   /* Backing store is too slow in color systems */
    168:   window_attributes.backing_store     = NotUseful;
    169:   window_attributes.backing_pixel     = backgnd_pixel;
    170:   window_attributes.save_under        = 1;
    171:   window_attributes.event_mask        = 0;
    172:   window_attributes.do_not_propagate_mask = 0;
    173:   window_attributes.override_redirect = 0;
    174:   window_attributes.colormap          = XiWin->cmap;
    175:   /* None for cursor does NOT mean none, it means cursor of Parent */
    176:   window_attributes.cursor            = None;

    178:   wmask = CWBackPixmap | CWBackPixel    | CWBorderPixmap  | CWBitGravity |
    179:           CWWinGravity | CWBackingStore | CWBackingPixel  | CWOverrideRedirect |
    180:           CWSaveUnder  | CWEventMask    | CWDontPropagate |
    181:           CWCursor     | CWColormap;

    183:   XiWin->win = XCreateWindow(XiWin->disp,RootWindow(XiWin->disp,XiWin->screen),x,y,w,h,border_width,XiWin->depth,InputOutput,XiWin->vis,wmask,&window_attributes);
    184:   if (!XiWin->win) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Unable to open X window");

    186:   /* set window manager hints */
    187:   {
    188:     XWMHints      wm_hints;
    189:     XClassHint    class_hints;
    190:     XTextProperty windowname,iconname;

    192:     if (label) XStringListToTextProperty(&label,1,&windowname);
    193:     else       XStringListToTextProperty(&label,0,&windowname);
    194:     if (label) XStringListToTextProperty(&label,1,&iconname);
    195:     else       XStringListToTextProperty(&label,0,&iconname);

    197:     wm_hints.initial_state = NormalState;
    198:     wm_hints.input         = True;
    199:     wm_hints.flags         = StateHint|InputHint;

    201:     /* These properties can be used by window managers to decide how to display a window */
    202:     class_hints.res_name  = (char*)"petsc";
    203:     class_hints.res_class = (char*)"PETSc";

    205:     size_hints.x          = x;
    206:     size_hints.y          = y;
    207:     size_hints.min_width  = 4*border_width;
    208:     size_hints.min_height = 4*border_width;
    209:     size_hints.width      = w;
    210:     size_hints.height     = h;
    211:     size_hints.flags      = USPosition | USSize | PMinSize;

    213:     XSetWMProperties(XiWin->disp,XiWin->win,&windowname,&iconname,0,0,&size_hints,&wm_hints,&class_hints);
    214:     XFree((void*)windowname.value);
    215:     XFree((void*)iconname.value);
    216:   }

    218:   /* make the window visible */
    219:   XSelectInput(XiWin->disp,XiWin->win,ExposureMask|StructureNotifyMask);
    220:   XMapWindow(XiWin->disp,XiWin->win);
    221:   /* some window systems are cruel and interfere with the placement of
    222:      windows.  We wait here for the window to be created or to die */
    223:   if (PetscDrawXiWaitMap(XiWin)) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Wait for X window failed");
    224:   XSelectInput(XiWin->disp,XiWin->win,NoEventMask);
    225:   return(0);
    226: }

    228: PetscErrorCode PetscDrawXiQuickWindow(PetscDraw_X *XiWin,char *name,int x,int y,int nx,int ny)
    229: {

    233:   PetscDrawSetColormap_X(XiWin,(Colormap)0);
    234:   PetscDrawXiDisplayWindow(XiWin,name,x,y,nx,ny);
    235:   XSetWindowBackground(XiWin->disp,XiWin->win,XiWin->background);
    236:   XClearWindow(XiWin->disp,XiWin->win);
    237:   return(0);
    238: }

    240: /*
    241:    A version from an already defined window
    242: */
    243: PetscErrorCode PetscDrawXiQuickWindowFromWindow(PetscDraw_X *XiWin,Window win)
    244: {
    245:   XWindowAttributes attributes;
    246:   PetscErrorCode    ierr;

    249:   XiWin->win = win;
    250:   XGetWindowAttributes(XiWin->disp,XiWin->win,&attributes);
    251:   PetscDrawSetColormap_X(XiWin,attributes.colormap);
    252:   return(0);
    253: }

    255: PetscErrorCode PetscDrawXiQuickPixmap(PetscDraw_X* XiWin)
    256: {
    258:   if (XiWin->drw) XFreePixmap(XiWin->disp,XiWin->drw);
    259:   XiWin->drw = XCreatePixmap(XiWin->disp,RootWindow(XiWin->disp,XiWin->screen),XiWin->w,XiWin->h,XiWin->depth);
    260:   PetscDrawXiSetPixVal(XiWin,XiWin->background);
    261:   XFillRectangle(XiWin->disp,XiWin->drw,XiWin->gc.set,0,0,XiWin->w,XiWin->h);
    262:   XSync(XiWin->disp,False);
    263:   return(0);
    264: }

    266: PetscErrorCode PetscDrawXiResizeWindow(PetscDraw_X* XiWin,int w,int h)
    267: {
    268:   XEvent event;
    270:   XSelectInput(XiWin->disp,XiWin->win,StructureNotifyMask);
    271:   XResizeWindow(XiWin->disp,XiWin->win,(unsigned int)w,(unsigned int)h);
    272:   XWindowEvent(XiWin->disp,XiWin->win,StructureNotifyMask,&event);
    273:   XSelectInput(XiWin->disp,XiWin->win,NoEventMask);
    274:   return(0);
    275: }

    277: PetscErrorCode PetscDrawXiGetGeometry(PetscDraw_X *XiWin,int *x,int *y,int *w,int *h)
    278: {
    279:   XWindowAttributes attributes;
    280:   Window            root,parent,child;
    281:   int               xx=0,yy=0;
    282:   unsigned int      ww=0,hh=0,dummy;
    284:   if (XiWin->win) {
    285:     XGetGeometry(XiWin->disp,XiWin->win,&parent,&xx,&yy,&ww,&hh,&dummy,&dummy);
    286:     root = RootWindow(XiWin->disp,XiWin->screen);
    287:     if (!XTranslateCoordinates(XiWin->disp,XiWin->win,root,0,0,&xx,&yy,&child)) {
    288:       XGetWindowAttributes(XiWin->disp,XiWin->win,&attributes);
    289:       root = attributes.screen->root;
    290:       (void)XTranslateCoordinates(XiWin->disp,XiWin->win,root,0,0,&xx,&yy,&child);
    291:     }
    292:   } else if (XiWin->drw) {
    293:     XGetGeometry(XiWin->disp,XiWin->drw,&root,&xx,&yy,&ww,&hh,&dummy,&dummy);
    294:   }
    295:   if (x) *x = xx;
    296:   if (y) *y = yy;
    297:   if (w) *w = (int)ww;
    298:   if (h) *h = (int)hh;
    299:   return(0);
    300: }