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 - horizontal user coordinate of location (user may pass in NULL).
 19: .   y_user - vertical user coordinate of location (user may pass in NULL).
 20: .   x_phys - horizontal window coordinate (user may pass in NULL).
 21: -   y_phys - vertical window coordinate (user may pass in NULL).

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

 26:     Level: intermediate
 27: @*/
 28: PetscErrorCode  PetscDrawGetMouseButton(PetscDraw draw,PetscDrawButton *button,PetscReal *x_user,PetscReal *y_user,PetscReal *x_phys,PetscReal *y_phys)
 29: {
 30:   PetscReal      bcast[4] = {0,0,0,0};

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

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

 39:   MPI_Bcast((PetscEnum*)button,1,MPIU_ENUM,0,PetscObjectComm((PetscObject)draw));
 40:   if (x_user) bcast[0] = *x_user;
 41:   if (y_user) bcast[1] = *y_user;
 42:   if (x_phys) bcast[2] = *x_phys;
 43:   if (y_phys) bcast[3] = *y_phys;
 44:   MPI_Bcast(bcast,4,MPIU_REAL,0,PetscObjectComm((PetscObject)draw));
 45:   if (x_user) *x_user = bcast[0];
 46:   if (y_user) *y_user = bcast[1];
 47:   if (x_phys) *x_phys = bcast[2];
 48:   if (y_phys) *y_phys = bcast[3];
 49:   return 0;
 50: }