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

  7: /*@
  8:     PetscDrawGetMouseButton - Returns location of mouse and which button was
  9:     pressed. Waits for button to be pressed.

 11:     Collective over PetscDraw

 13:     Input Parameter:
 14: .   draw - the window to be used

 16:     Output Parameters:
 17: +   button - one of PETSC_BUTTON_LEFT, PETSC_BUTTON_CENTER, PETSC_BUTTON_RIGHT, PETSC_BUTTON_WHEEL_UP, PETSC_BUTTON_WHEEL_DOWN
 18: .   x_user, y_user - user coordinates of location (user may pass in NULL).
 19: -   x_phys, y_phys - window coordinates (user may pass in NULL).

 21:     Notes: Only processor 0 actually waits for the button to be pressed.

 23:     Level: intermediate
 24: @*/
 25: PetscErrorCode  PetscDrawGetMouseButton(PetscDraw draw,PetscDrawButton *button,PetscReal *x_user,PetscReal *y_user,PetscReal *x_phys,PetscReal *y_phys)
 26: {
 27:   PetscReal      bcast[4] = {0,0,0,0};

 33:   *button = PETSC_BUTTON_NONE;
 34:   if (!draw->ops->getmousebutton) return(0);

 36:   (*draw->ops->getmousebutton)(draw,button,x_user,y_user,x_phys,y_phys);

 38:   MPI_Bcast((PetscEnum*)button,1,MPIU_ENUM,0,PetscObjectComm((PetscObject)draw));
 39:   if (x_user) bcast[0] = *x_user;
 40:   if (y_user) bcast[1] = *y_user;
 41:   if (x_phys) bcast[2] = *x_phys;
 42:   if (y_phys) bcast[3] = *y_phys;
 43:   MPI_Bcast(bcast,4,MPIU_REAL,0,PetscObjectComm((PetscObject)draw));
 44:   if (x_user) *x_user = bcast[0];
 45:   if (y_user) *y_user = bcast[1];
 46:   if (x_phys) *x_phys = bcast[2];
 47:   if (y_phys) *y_phys = bcast[3];
 48:   return(0);
 49: }