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 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 - 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). 22 23 Note: 24 Only processor 0 actually waits for the button to be pressed. 25 26 Level: intermediate 27 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}; 33 34 PetscFunctionBegin; 35 PetscValidHeaderSpecific(draw, PETSC_DRAW_CLASSID, 1); 36 PetscValidPointer(button, 2); 37 *button = PETSC_BUTTON_NONE; 38 if (!draw->ops->getmousebutton) PetscFunctionReturn(0); 39 40 PetscUseTypeMethod(draw, getmousebutton, button, x_user, y_user, x_phys, y_phys); 41 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(0); 53 } 54