Actual source code: dtext.c

petsc-3.5.2 2014-09-08
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  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: }