1 #include <petsc/private/drawimpl.h> /*I "petscdraw.h" I*/
2
3 /*@
4 PetscDrawGetMouseButton - Returns location of mouse and which button was
5 pressed. Waits for button to be pressed.
6
7 Collective
8
9 Input Parameter:
10 . draw - the window to be used
11
12 Output Parameters:
13 + button - one of `PETSC_BUTTON_LEFT`, `PETSC_BUTTON_CENTER`, `PETSC_BUTTON_RIGHT`, `PETSC_BUTTON_WHEEL_UP`, `PETSC_BUTTON_WHEEL_DOWN`
14 . x_user - horizontal user coordinate of location (user may pass in NULL).
15 . y_user - vertical user coordinate of location (user may pass in NULL).
16 . x_phys - horizontal window coordinate (user may pass in NULL).
17 - y_phys - vertical window coordinate (user may pass in NULL).
18
19 Note:
20 Only processor 0 actually waits for the button to be pressed.
21
22 Level: intermediate
23
24 .seealso: `PetscDraw`, `PetscDrawButton`
25 @*/
PetscDrawGetMouseButton(PetscDraw draw,PetscDrawButton * button,PetscReal * x_user,PetscReal * y_user,PetscReal * x_phys,PetscReal * y_phys)26 PetscErrorCode PetscDrawGetMouseButton(PetscDraw draw, PetscDrawButton *button, PetscReal *x_user, PetscReal *y_user, PetscReal *x_phys, PetscReal *y_phys)
27 {
28 PetscReal bcast[4] = {0, 0, 0, 0};
29
30 PetscFunctionBegin;
31 PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1);
32 PetscAssertPointer(button, 2);
33 *button = PETSC_BUTTON_NONE;
34 if (!draw->ops->getmousebutton) PetscFunctionReturn(PETSC_SUCCESS);
35
36 PetscUseTypeMethod(draw, getmousebutton, button, x_user, y_user, x_phys, y_phys);
37
38 PetscCallMPI(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 PetscCallMPI(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 PetscFunctionReturn(PETSC_SUCCESS);
49 }
50