Actual source code: dmouse.c
1: #include <petsc/private/drawimpl.h>
3: /*@
4: PetscDrawGetMouseButton - Returns location of mouse and which button was
5: pressed. Waits for button to be pressed.
7: Collective
9: Input Parameter:
10: . draw - the window to be used
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).
19: Note:
20: Only processor 0 actually waits for the button to be pressed.
22: Level: intermediate
24: .seealso: `PetscDraw`, `PetscDrawButton`
25: @*/
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};
30: PetscFunctionBegin;
32: PetscAssertPointer(button, 2);
33: *button = PETSC_BUTTON_NONE;
34: if (!draw->ops->getmousebutton) PetscFunctionReturn(PETSC_SUCCESS);
36: PetscUseTypeMethod(draw, getmousebutton, button, x_user, y_user, x_phys, y_phys);
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: }