Actual source code: dmouse.c
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
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: Note:
24: Only processor 0 actually waits for the button to be pressed.
26: Level: intermediate
28: .seealso: `PetscDraw`, `PetscDrawButton`
29: @*/
30: PetscErrorCode PetscDrawGetMouseButton(PetscDraw draw, PetscDrawButton *button, PetscReal *x_user, PetscReal *y_user, PetscReal *x_phys, PetscReal *y_phys)
31: {
32: PetscReal bcast[4] = {0, 0, 0, 0};
34: PetscFunctionBegin;
37: *button = PETSC_BUTTON_NONE;
38: if (!draw->ops->getmousebutton) PetscFunctionReturn(PETSC_SUCCESS);
40: PetscUseTypeMethod(draw, getmousebutton, button, x_user, y_user, x_phys, y_phys);
42: PetscCallMPI(MPI_Bcast((PetscEnum *)button, 1, MPIU_ENUM, 0, PetscObjectComm((PetscObject)draw)));
43: if (x_user) bcast[0] = *x_user;
44: if (y_user) bcast[1] = *y_user;
45: if (x_phys) bcast[2] = *x_phys;
46: if (y_phys) bcast[3] = *y_phys;
47: PetscCallMPI(MPI_Bcast(bcast, 4, MPIU_REAL, 0, PetscObjectComm((PetscObject)draw)));
48: if (x_user) *x_user = bcast[0];
49: if (y_user) *y_user = bcast[1];
50: if (x_phys) *x_phys = bcast[2];
51: if (y_phys) *y_phys = bcast[3];
52: PetscFunctionReturn(PETSC_SUCCESS);
53: }