Date: 2022-03-31T04:46:00+00:00

Actual source code: xinit.c

      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: {
     23:   XiWin->disp = XOpenDisplay(display);
     24:   if (!XiWin->disp) {
     25:     SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Unable to open display on %s\n\
     26:     Make sure your COMPUTE NODES are authorized to connect \n\
     27:     to this X server and either your DISPLAY variable\n\
     28:     is set or you use the -display name option\n",display);
     29:   }
     30:   XiWin->screen     = DefaultScreen(XiWin->disp);
     31:   XiWin->vis        = DefaultVisual(XiWin->disp,XiWin->screen);
     32:   XiWin->depth      = DefaultDepth(XiWin->disp,XiWin->screen);
     33:   XiWin->cmap       = DefaultColormap(XiWin->disp,XiWin->screen);
     34:   XiWin->background = WhitePixel(XiWin->disp,XiWin->screen);
     35:   XiWin->foreground = BlackPixel(XiWin->disp,XiWin->screen);
     36:   return 0;
     37: }

     39: PetscErrorCode PetscDrawXiClose(PetscDraw_X *XiWin)
     40: {
     41:   if (!XiWin) return 0;
     42:   PetscFree(XiWin->font);
     43:   if (XiWin->disp) {
     44: #if defined(PETSC_HAVE_SETJMP_H)
     45:     jmp_buf              jmpbuf;
     46:     PetscXIOErrorHandler xioerrhdl;
     47:     PetscMemcpy(&jmpbuf,&PetscXIOErrorHandlerJumpBuf,sizeof(jmpbuf));
     48:     xioerrhdl = PetscSetXIOErrorHandler(PetscXIOErrorHandlerJump);
     49:     if (!setjmp(PetscXIOErrorHandlerJumpBuf))
     50: #endif
     51:     {
     52:       XFreeGC(XiWin->disp,XiWin->gc.set);
     53:       XCloseDisplay(XiWin->disp);
     54:     }
     55:     XiWin->disp = NULL;
     56: #if defined(PETSC_HAVE_SETJMP_H)
     57:     (void)PetscSetXIOErrorHandler(xioerrhdl);
     58:     PetscMemcpy(&PetscXIOErrorHandlerJumpBuf,&jmpbuf,sizeof(jmpbuf));
     59: #endif
     60:   }
     61:   return 0;
     62: }

     64: /*
     65:    PetscDrawXiCreateGC - setup the GC structure
     66: */
     67: static PetscErrorCode PetscDrawXiCreateGC(PetscDraw_X *XiWin,PetscDrawXiPixVal fg)
     68: {
     69:   XGCValues gcvalues;             /* window graphics context values */

     71:   /* Set the graphics contexts */
     72:   /* create a gc for the ROP_SET operation (writing the fg value to a pixel) */
     73:   /* (do this with function GXcopy; GXset will automatically write 1) */
     74:   gcvalues.function   = GXcopy;
     75:   gcvalues.foreground = fg;
     76:   XiWin->gc.cur_pix   = fg;
     77:   XiWin->gc.set       = XCreateGC(XiWin->disp,RootWindow(XiWin->disp,XiWin->screen),GCFunction|GCForeground,&gcvalues);
     79:   return 0;
     80: }

     82: /*
     83:    PetscDrawXiInit - basic setup the draw (display, graphics context, font)
     84: */
     85: PetscErrorCode PetscDrawXiInit(PetscDraw_X *XiWin,const char display[])
     86: {
     87:   PetscDrawXiOpenDisplay(XiWin,display);
     88:   PetscDrawXiCreateGC(XiWin,XiWin->foreground);
     89:   PetscDrawXiFontFixed(XiWin,6,10,&XiWin->font);
     90:   return 0;
     91: }

     93: /*
     94:     This routine waits until the window is actually created or destroyed
     95:     Returns 0 if window is mapped; 1 if window is destroyed.
     96:  */
     97: static PetscErrorCode PetscDrawXiWaitMap(PetscDraw_X *XiWin)
     98: {
     99:   XEvent event;

    101:   while (1) {
    102:     XMaskEvent(XiWin->disp,ExposureMask|StructureNotifyMask,&event);
    103:     if (event.xany.window != XiWin->win) break;
    104:     else {
    105:       switch (event.type) {
    106:       case ConfigureNotify:
    107:         /* window has been moved or resized */
    108:         XiWin->w = event.xconfigure.width  - 2 * event.xconfigure.border_width;
    109:         XiWin->h = event.xconfigure.height - 2 * event.xconfigure.border_width;
    110:         break;
    111:       case DestroyNotify:
    112:         return 1;
    113:       case Expose:
    114:         return 0;
    115:         /* else ignore event */
    116:       }
    117:     }
    118:   }
    119:   return 0;
    120: }

    122: /*
    123:     Actually display a window at [x,y] with sizes (w,h)
    124: */
    125: static PetscErrorCode PetscDrawXiDisplayWindow(PetscDraw_X *XiWin,char *label,int x,int y,int w,int h)
    126: {
    127:   unsigned int         wavail,havail;
    128:   XSizeHints           size_hints;
    129:   XWindowAttributes    in_window_attributes;
    130:   XSetWindowAttributes window_attributes;
    131:   unsigned int         border_width = 0;
    132:   unsigned long        backgnd_pixel = WhitePixel(XiWin->disp,XiWin->screen);
    133:   unsigned long        wmask;

    135:   /* get the available widths */
    136:   wavail = DisplayWidth(XiWin->disp,XiWin->screen);
    137:   havail = DisplayHeight(XiWin->disp,XiWin->screen);
    139:   if ((unsigned int)w > wavail) w = wavail;
    140:   if ((unsigned int)h > havail) h = havail;

    142:   if (x < 0) x = (int)(wavail - (unsigned int)w + (unsigned int)x);
    143:   if (y < 0) y = (int)(havail - (unsigned int)h + (unsigned int)y);
    144:   x = ((unsigned int)x + w > wavail) ? (int)(wavail - (unsigned int)w) : x;
    145:   y = ((unsigned int)y + h > havail) ? (int)(havail - (unsigned int)h) : y;

    147:   /* We need XCreateWindow since we may need an visual other than the default one */
    148:   XGetWindowAttributes(XiWin->disp,RootWindow(XiWin->disp,XiWin->screen),&in_window_attributes);
    149:   window_attributes.background_pixmap = None;
    150:   window_attributes.background_pixel  = backgnd_pixel;
    151:   /* No border for now */
    152:   window_attributes.border_pixmap     = None;
    153:   /*
    154:   window_attributes.border_pixel      = border_pixel;
    155:   */
    156:   window_attributes.bit_gravity       = in_window_attributes.bit_gravity;
    157:   window_attributes.win_gravity       = in_window_attributes.win_gravity;
    158:   /* Backing store is too slow in color systems */
    159:   window_attributes.backing_store     = NotUseful;
    160:   window_attributes.backing_pixel     = backgnd_pixel;
    161:   window_attributes.save_under        = 1;
    162:   window_attributes.event_mask        = 0;
    163:   window_attributes.do_not_propagate_mask = 0;
    164:   window_attributes.override_redirect = 0;
    165:   window_attributes.colormap          = XiWin->cmap;
    166:   /* None for cursor does NOT mean none, it means cursor of Parent */
    167:   window_attributes.cursor            = None;

    169:   wmask = CWBackPixmap | CWBackPixel    | CWBorderPixmap  | CWBitGravity |
    170:           CWWinGravity | CWBackingStore | CWBackingPixel  | CWOverrideRedirect |
    171:           CWSaveUnder  | CWEventMask    | CWDontPropagate |
    172:           CWCursor     | CWColormap;

    174:   XiWin->win = XCreateWindow(XiWin->disp,RootWindow(XiWin->disp,XiWin->screen),x,y,w,h,border_width,XiWin->depth,InputOutput,XiWin->vis,wmask,&window_attributes);

    177:   /* set window manager hints */
    178:   {
    179:     XWMHints      wm_hints;
    180:     XClassHint    class_hints;
    181:     XTextProperty windowname,iconname;

    183:     if (label) XStringListToTextProperty(&label,1,&windowname);
    184:     else       XStringListToTextProperty(&label,0,&windowname);
    185:     if (label) XStringListToTextProperty(&label,1,&iconname);
    186:     else       XStringListToTextProperty(&label,0,&iconname);

    188:     wm_hints.initial_state = NormalState;
    189:     wm_hints.input         = True;
    190:     wm_hints.flags         = StateHint|InputHint;

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

    196:     size_hints.x          = x;
    197:     size_hints.y          = y;
    198:     size_hints.min_width  = 4*border_width;
    199:     size_hints.min_height = 4*border_width;
    200:     size_hints.width      = w;
    201:     size_hints.height     = h;
    202:     size_hints.flags      = USPosition | USSize | PMinSize;

    204:     XSetWMProperties(XiWin->disp,XiWin->win,&windowname,&iconname,NULL,0,&size_hints,&wm_hints,&class_hints);
    205:     XFree((void*)windowname.value);
    206:     XFree((void*)iconname.value);
    207:   }

    209:   /* make the window visible */
    210:   XSelectInput(XiWin->disp,XiWin->win,ExposureMask|StructureNotifyMask);
    211:   XMapWindow(XiWin->disp,XiWin->win);
    212:   /* some window systems are cruel and interfere with the placement of
    213:      windows.  We wait here for the window to be created or to die */
    215:   XSelectInput(XiWin->disp,XiWin->win,NoEventMask);
    216:   return 0;
    217: }

    219: PetscErrorCode PetscDrawXiQuickWindow(PetscDraw_X *XiWin,char *name,int x,int y,int nx,int ny)
    220: {
    221:   PetscDrawSetColormap_X(XiWin,(Colormap)0);
    222:   PetscDrawXiDisplayWindow(XiWin,name,x,y,nx,ny);
    223:   XSetWindowBackground(XiWin->disp,XiWin->win,XiWin->background);
    224:   XClearWindow(XiWin->disp,XiWin->win);
    225:   return 0;
    226: }

    228: /*
    229:    A version from an already defined window
    230: */
    231: PetscErrorCode PetscDrawXiQuickWindowFromWindow(PetscDraw_X *XiWin,Window win)
    232: {
    233:   XWindowAttributes attributes;

    235:   XiWin->win = win;
    236:   XGetWindowAttributes(XiWin->disp,XiWin->win,&attributes);
    237:   PetscDrawSetColormap_X(XiWin,attributes.colormap);
    238:   return 0;
    239: }

    241: PetscErrorCode PetscDrawXiQuickPixmap(PetscDraw_X* XiWin)
    242: {
    243:   if (XiWin->drw) XFreePixmap(XiWin->disp,XiWin->drw);
    244:   XiWin->drw = XCreatePixmap(XiWin->disp,RootWindow(XiWin->disp,XiWin->screen),XiWin->w,XiWin->h,XiWin->depth);
    245:   PetscDrawXiSetPixVal(XiWin,XiWin->background);
    246:   XFillRectangle(XiWin->disp,XiWin->drw,XiWin->gc.set,0,0,XiWin->w,XiWin->h);
    247:   XSync(XiWin->disp,False);
    248:   return 0;
    249: }

    251: PetscErrorCode PetscDrawXiResizeWindow(PetscDraw_X* XiWin,int w,int h)
    252: {
    253:   XEvent event;
    254:   XSelectInput(XiWin->disp,XiWin->win,StructureNotifyMask);
    255:   XResizeWindow(XiWin->disp,XiWin->win,(unsigned int)w,(unsigned int)h);
    256:   XWindowEvent(XiWin->disp,XiWin->win,StructureNotifyMask,&event);
    257:   XSelectInput(XiWin->disp,XiWin->win,NoEventMask);
    258:   return 0;
    259: }

    261: PetscErrorCode PetscDrawXiGetGeometry(PetscDraw_X *XiWin,int *x,int *y,int *w,int *h)
    262: {
    263:   XWindowAttributes attributes;
    264:   Window            root,parent,child;
    265:   int               xx=0,yy=0;
    266:   unsigned int      ww=0,hh=0,dummy;
    267:   if (XiWin->win) {
    268:     XGetGeometry(XiWin->disp,XiWin->win,&parent,&xx,&yy,&ww,&hh,&dummy,&dummy);
    269:     root = RootWindow(XiWin->disp,XiWin->screen);
    270:     if (!XTranslateCoordinates(XiWin->disp,XiWin->win,root,0,0,&xx,&yy,&child)) {
    271:       XGetWindowAttributes(XiWin->disp,XiWin->win,&attributes);
    272:       root = attributes.screen->root;
    273:       (void)XTranslateCoordinates(XiWin->disp,XiWin->win,root,0,0,&xx,&yy,&child);
    274:     }
    275:   } else if (XiWin->drw) {
    276:     XGetGeometry(XiWin->disp,XiWin->drw,&root,&xx,&yy,&ww,&hh,&dummy,&dummy);
    277:   }
    278:   if (x) *x = xx;
    279:   if (y) *y = yy;
    280:   if (w) *w = (int)ww;
    281:   if (h) *h = (int)hh;
    282:   return 0;
    283: }