xref: /petsc/src/sys/classes/draw/interface/dline.c (revision 811af0c4b09a35de4306c442f88bd09fdc09897d)

/*
       Provides the calling sequences for all the basic PetscDraw routines.
*/
#include <petsc/private/drawimpl.h> /*I "petscdraw.h" I*/

/*@
   PetscDrawGetBoundingBox - Gets the bounding box of all `PetscDrawStringBoxed()` commands

   Not collective

   Input Parameter:
.  draw - the drawing context

   Output Parameters:
.   xl,yl,xr,yr - coordinates of lower left and upper right corners of bounding box

   Level: intermediate

.seealso: `PetscDraw`, `PetscDrawPushCurrentPoint()`, `PetscDrawPopCurrentPoint()`, `PetscDrawSetCurrentPoint()`
@*/
PetscErrorCode PetscDrawGetBoundingBox(PetscDraw draw, PetscReal *xl, PetscReal *yl, PetscReal *xr, PetscReal *yr) {
  PetscFunctionBegin;
  PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1);
  if (xl) PetscValidRealPointer(xl, 2);
  if (yl) PetscValidRealPointer(yl, 3);
  if (xr) PetscValidRealPointer(xr, 4);
  if (yr) PetscValidRealPointer(yr, 5);
  if (xl) *xl = draw->boundbox_xl;
  if (yl) *yl = draw->boundbox_yl;
  if (xr) *xr = draw->boundbox_xr;
  if (yr) *yr = draw->boundbox_yr;
  PetscFunctionReturn(0);
}

/*@
   PetscDrawGetCurrentPoint - Gets the current draw point, some codes use this point to determine where to draw next

   Not collective

   Input Parameter:
.  draw - the drawing context

   Output Parameters:
.   x,y - the current point

   Level: intermediate

.seealso: `PetscDraw`, `PetscDrawPushCurrentPoint()`, `PetscDrawPopCurrentPoint()`, `PetscDrawSetCurrentPoint()`
@*/
PetscErrorCode PetscDrawGetCurrentPoint(PetscDraw draw, PetscReal *x, PetscReal *y) {
  PetscFunctionBegin;
  PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1);
  PetscValidRealPointer(x, 2);
  PetscValidRealPointer(y, 3);
  *x = draw->currentpoint_x[draw->currentpoint];
  *y = draw->currentpoint_y[draw->currentpoint];
  PetscFunctionReturn(0);
}

/*@
   PetscDrawSetCurrentPoint - Sets the current draw point, some codes use this point to determine where to draw next

   Not collective

   Input Parameters:
+  draw - the drawing context
-  x,y - the location of the current point

   Level: intermediate

.seealso: `PetscDraw`, `PetscDrawPushCurrentPoint()`, `PetscDrawPopCurrentPoint()`, `PetscDrawGetCurrentPoint()`
@*/
PetscErrorCode PetscDrawSetCurrentPoint(PetscDraw draw, PetscReal x, PetscReal y) {
  PetscFunctionBegin;
  PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1);
  draw->currentpoint_x[draw->currentpoint] = x;
  draw->currentpoint_y[draw->currentpoint] = y;
  PetscFunctionReturn(0);
}

/*@
   PetscDrawPushCurrentPoint - Pushes a new current draw point, retaining the old one, some codes use this point to determine where to draw next

   Not collective

   Input Parameters:
+  draw - the drawing context
-  x,y - the location of the current point

   Level: intermediate

.seealso: `PetscDraw`, `PetscDrawPushCurrentPoint()`, `PetscDrawPopCurrentPoint()`, `PetscDrawGetCurrentPoint()`
@*/
PetscErrorCode PetscDrawPushCurrentPoint(PetscDraw draw, PetscReal x, PetscReal y) {
  PetscFunctionBegin;
  PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1);
  PetscCheck(draw->currentpoint <= 19, PETSC_COMM_SELF, PETSC_ERR_SUP, "You have pushed too many current points");
  draw->currentpoint_x[++draw->currentpoint] = x;
  draw->currentpoint_y[draw->currentpoint]   = y;
  PetscFunctionReturn(0);
}

/*@
   PetscDrawPopCurrentPoint - Pops a current draw point (discarding it)

   Not collective

   Input Parameter:
.  draw - the drawing context

   Level: intermediate

.seealso: `PetscDraw`, `PetscDrawPushCurrentPoint()`, `PetscDrawSetCurrentPoint()`, `PetscDrawGetCurrentPoint()`
@*/
PetscErrorCode PetscDrawPopCurrentPoint(PetscDraw draw) {
  PetscFunctionBegin;
  PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1);
  PetscCheck(draw->currentpoint-- > 0, PETSC_COMM_SELF, PETSC_ERR_SUP, "You have popped too many current points");
  PetscFunctionReturn(0);
}

/*@
   PetscDrawLine - draws a line onto a drawable.

   Not collective

   Input Parameters:
+  draw - the drawing context
.  xl,yl,xr,yr - the coordinates of the line endpoints
-  cl - the colors of the endpoints

   Level: beginner

.seealso: `PetscDraw`, `PetscDrawArrow()`, `PetscDrawLineSetWidth()`, `PetscDrawLineGetWidth()`, `PetscDrawRectangle()`, `PetscDrawTriangle()`, `PetscDrawEllipse()`,
          `PetscDrawMarker()`, `PetscDrawPoint()`
@*/
PetscErrorCode PetscDrawLine(PetscDraw draw, PetscReal xl, PetscReal yl, PetscReal xr, PetscReal yr, int cl) {
  PetscFunctionBegin;
  PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1);
  PetscUseTypeMethod(draw, line, xl, yl, xr, yr, cl);
  PetscFunctionReturn(0);
}

/*@
   PetscDrawArrow - draws a line with arrow head at end if the line is long enough

   Not collective

   Input Parameters:
+  draw - the drawing context
.  xl,yl,xr,yr - the coordinates of the line endpoints
-  cl - the colors of the endpoints

   Level: beginner

.seealso: `PetscDraw`, `PetscDrawLine()`, `PetscDrawLineSetWidth()`, `PetscDrawLineGetWidth()`, `PetscDrawRectangle()`, `PetscDrawTriangle()`, `PetscDrawEllipse()`,
          `PetscDrawMarker()`, `PetscDrawPoint()`
@*/
PetscErrorCode PetscDrawArrow(PetscDraw draw, PetscReal xl, PetscReal yl, PetscReal xr, PetscReal yr, int cl) {
  PetscFunctionBegin;
  PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1);
  PetscUseTypeMethod(draw, arrow, xl, yl, xr, yr, cl);
  PetscFunctionReturn(0);
}

/*@
   PetscDrawLineSetWidth - Sets the line width for future draws.  The width is
   relative to the user coordinates of the window; 0.0 denotes the natural
   width; 1.0 denotes the entire viewport.

   Not collective

   Input Parameters:
+  draw - the drawing context
-  width - the width in user coordinates

   Level: advanced

.seealso: `PetscDraw`, `PetscDrawLineGetWidth()`, `PetscDrawLine()`, `PetscDrawArrow()`
@*/
PetscErrorCode PetscDrawLineSetWidth(PetscDraw draw, PetscReal width) {
  PetscFunctionBegin;
  PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1);
  PetscTryTypeMethod(draw, linesetwidth, width);
  PetscFunctionReturn(0);
}

/*@
   PetscDrawLineGetWidth - Gets the line width for future draws.  The width is
   relative to the user coordinates of the window; 0.0 denotes the natural
   width; 1.0 denotes the interior viewport.

   Not collective

   Input Parameter:
.  draw - the drawing context

   Output Parameter:
.  width - the width in user coordinates

   Level: advanced

   Note:
   Not currently implemented.

.seealso: `PetscDraw`, `PetscDrawLineSetWidth()`, `PetscDrawLine()`, `PetscDrawArrow()`
@*/
PetscErrorCode PetscDrawLineGetWidth(PetscDraw draw, PetscReal *width) {
  PetscFunctionBegin;
  PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1);
  PetscValidRealPointer(width, 2);
  PetscUseTypeMethod(draw, linegetwidth, width);
  PetscFunctionReturn(0);
}