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