Date: 2013-07-02T14:38:16+00:00

Actual source code: dtext.c
petsc-3.4.2 2013-07-02

      2: /*
      3:        Provides the calling sequences for all the basic PetscDraw routines.
      4: */
      5: #include <petsc-private/drawimpl.h>  /*I "petscdraw.h" I*/

      9: /*@C
     10:    PetscDrawString - PetscDraws text onto a drawable.

     12:    Not Collective

     14:    Input Parameters:
     15: +  draw - the drawing context
     16: .  xl - the coordinates of lower left corner of text
     17: .  yl - the coordinates of lower left corner of text
     18: .  cl - the color of the text
     19: -  text - the text to draw

     21:    Level: beginner

     23:    Concepts: drawing^string
     24:    Concepts: string^drawing

     26: .seealso: PetscDrawStringVertical()

     28: @*/
     29: PetscErrorCode  PetscDrawString(PetscDraw draw,PetscReal xl,PetscReal yl,int cl,const char text[])
     30: {
     32:   PetscBool      isnull;

     37:   PetscObjectTypeCompare((PetscObject)draw,PETSC_DRAW_NULL,&isnull);
     38:   if (isnull) return(0);
     39:   (*draw->ops->string)(draw,xl,yl,cl,text);
     40:   return(0);
     41: }

     45: /*@C
     46:    PetscDrawBoxedString - Draws a string with a box around it

     48:    Not Collective

     50:    Input Parameters:
     51: +  draw - the drawing context
     52: .  sxl - the coordinates of center of the box
     53: .  syl - the coordinates of top line of box
     54: .  sc - the color of the text
     55: .  bc - the color of the bounding box
     56: -  text - the text to draw

     58:    Output Parameter:
     59: .   w,h - width and height of resulting box (optional)

     61:    Level: beginner

     63:    Concepts: drawing^string
     64:    Concepts: string^drawing

     66: .seealso: PetscDrawStringVertical(), PetscDrawBoxedStringSize()

     68: @*/
     69: PetscErrorCode  PetscDrawBoxedString(PetscDraw draw,PetscReal sxl,PetscReal syl,int sc,int bc,const char text[],PetscReal *w,PetscReal *h)
     70: {
     72:   PetscBool      isnull;
     73:   PetscReal      top,left,right,bottom,tw,th;
     74:   size_t         len,mlen = 0;
     75:   char           **array;
     76:   int            cnt,i;

     81:   PetscObjectTypeCompare((PetscObject)draw,PETSC_DRAW_NULL,&isnull);
     82:   if (isnull) return(0);

     84:   if (draw->ops->boxedstring) {
     85:     (*draw->ops->boxedstring)(draw,sxl,syl,sc,bc,text,w,h);
     86:     return(0);
     87:   }

     89:   PetscStrToArray(text,'\n',&cnt,&array);
     90:   for (i=0; i<cnt; i++) {
     91:     PetscStrlen(array[i],&len);
     92:     mlen = PetscMax(mlen,len);
     93:   }

     95:   PetscDrawStringGetSize(draw,&tw,&th);

     97:   top    = syl;
     98:   left   = sxl - .5*(mlen + 2)*tw;
     99:   right  = sxl + .5*(mlen + 2)*tw;
    100:   bottom = syl - (1.0 + cnt)*th;
    101:   if (w) *w = right - left;
    102:   if (h) *h = top - bottom;

    104:   /* compute new bounding box */
    105:   draw->boundbox_xl = PetscMin(draw->boundbox_xl,left);
    106:   draw->boundbox_xr = PetscMax(draw->boundbox_xr,right);
    107:   draw->boundbox_yl = PetscMin(draw->boundbox_yl,bottom);
    108:   draw->boundbox_yr = PetscMax(draw->boundbox_yr,top);

    110:   /* top, left, bottom, right lines */
    111:   PetscDrawLine(draw,left,top,right,top,bc);
    112:   PetscDrawLine(draw,left,bottom,left,top,bc);
    113:   PetscDrawLine(draw,right,bottom,right,top,bc);
    114:   PetscDrawLine(draw,left,bottom,right,bottom,bc);

    116:   for  (i=0; i<cnt; i++) {
    117:     PetscDrawString(draw,left + tw,top - (1.5 + i)*th,sc,array[i]);
    118:   }
    119:   PetscStrToArrayDestroy(cnt,array);
    120:   return(0);
    121: }