1
2 /*
3 Provides the calling sequences for all the basic PetscDraw routines.
4 */
5 #include <petsc/private/drawimpl.h> /*I "petscdraw.h" I*/
6
7 /*@
8 PetscDrawGetMouseButton - Returns location of mouse and which button was
9 pressed. Waits for button to be pressed.
10
11 Collective over PetscDraw
12
13 Input Parameter:
14 . draw - the window to be used
15
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, y_user - user coordinates of location (user may pass in NULL).
19 - x_phys, y_phys - window coordinates (user may pass in NULL).
20
21 Notes:
22 Only processor 0 actually waits for the button to be pressed.
23
24 Level: intermediate
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 PetscErrorCode ierr;
30
31 PetscFunctionBegin;
32 PetscValidHeaderSpecific(draw,PETSC_DRAW_CLASSID,1);
33 PetscValidPointer(button,2);
34 *button = PETSC_BUTTON_NONE;
35 if (!draw->ops->getmousebutton) PetscFunctionReturn(0);
36
37 ierr = (*draw->ops->getmousebutton)(draw,button,x_user,y_user,x_phys,y_phys);CHKERRQ(ierr);
38
39 ierr = MPI_Bcast((PetscEnum*)button,1,MPIU_ENUM,0,PetscObjectComm((PetscObject)draw));CHKERRQ(ierr);
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 ierr = MPI_Bcast(bcast,4,MPIU_REAL,0,PetscObjectComm((PetscObject)draw));CHKERRQ(ierr);
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(0);
50 }
51
52
53
54
55
56
57