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 - 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 Notes: 24 Only processor 0 actually waits for the button to be pressed. 25 26 Level: intermediate 27 @*/ 28 PetscErrorCode PetscDrawGetMouseButton(PetscDraw draw,PetscDrawButton *button,PetscReal *x_user,PetscReal *y_user,PetscReal *x_phys,PetscReal *y_phys) 29 { 30 PetscReal bcast[4] = {0,0,0,0}; 31 32 PetscFunctionBegin; 33 PetscValidHeaderSpecific(draw,PETSC_DRAW_CLASSID,1); 34 PetscValidPointer(button,2); 35 *button = PETSC_BUTTON_NONE; 36 if (!draw->ops->getmousebutton) PetscFunctionReturn(0); 37 38 PetscCall((*draw->ops->getmousebutton)(draw,button,x_user,y_user,x_phys,y_phys)); 39 40 PetscCallMPI(MPI_Bcast((PetscEnum*)button,1,MPIU_ENUM,0,PetscObjectComm((PetscObject)draw))); 41 if (x_user) bcast[0] = *x_user; 42 if (y_user) bcast[1] = *y_user; 43 if (x_phys) bcast[2] = *x_phys; 44 if (y_phys) bcast[3] = *y_phys; 45 PetscCallMPI(MPI_Bcast(bcast,4,MPIU_REAL,0,PetscObjectComm((PetscObject)draw))); 46 if (x_user) *x_user = bcast[0]; 47 if (y_user) *y_user = bcast[1]; 48 if (x_phys) *x_phys = bcast[2]; 49 if (y_phys) *y_phys = bcast[3]; 50 PetscFunctionReturn(0); 51 } 52