PetscViewerDrawOpen#

Opens a PetscDraw window for use as a PetscViewer with type PETSCVIEWERDRAW. If you want to do graphics in this window, you must call PetscViewerDrawGetDraw() and perform the graphics on the PetscDraw object.

Synopsis#

#include "petscdraw.h" 
#include "petscviewer.h" 
PetscErrorCode PetscViewerDrawOpen(MPI_Comm comm, const char display[], const char title[], int x, int y, int w, int h, PetscViewer *viewer)

Collective

Input Parameters#

comm - communicator that will share window
display - the X display on which to open, or NULL for the local machine
title - the title to put in the title bar, or NULL for no title
x - horizontal screen coordinate of the upper left corner of window, or use PETSC_DECIDE
y - vertical screen coordinate of the upper left corner of window, or use PETSC_DECIDE
w - window width in pixels, or may use PETSC_DECIDE or PETSC_DRAW_FULL_SIZE, PETSC_DRAW_HALF_SIZE,PETSC_DRAW_THIRD_SIZE, PETSC_DRAW_QUARTER_SIZE
h - window height in pixels, or may use PETSC_DECIDE or PETSC_DRAW_FULL_SIZE, PETSC_DRAW_HALF_SIZE,PETSC_DRAW_THIRD_SIZE, PETSC_DRAW_QUARTER_SIZE

Output Parameter#

viewer - the PetscViewer

Format Options#

PETSC_VIEWER_DRAW_BASIC - displays with basic format
PETSC_VIEWER_DRAW_LG - displays using a line graph

Options Database Keys#

-draw_type - use x or null
-nox - Disables all x-windows output
-display - Specifies name of machine for the X display
-geometry <x,y,w,h> - allows setting the window location and size
-draw_pause - Sets time (in seconds) that the program pauses after PetscDrawPause() has been called (0 is default, -1 implies until user input).

Fortran Note#

Whenever indicating null character data in a Fortran code, PETSC_NULL_CHARACTER must be employed; using NULL is not correct for character data! Thus, PETSC_NULL_CHARACTER can be used for the display and title input parameters.