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: Only processor 0 actually waits for the button to be pressed. 22 23 Level: intermediate 24 @*/ 25 PetscErrorCode PetscDrawGetMouseButton(PetscDraw draw,PetscDrawButton *button,PetscReal *x_user,PetscReal *y_user,PetscReal *x_phys,PetscReal *y_phys) 26 { 27 PetscReal bcast[4] = {0,0,0,0}; 28 PetscErrorCode ierr; 29 30 PetscFunctionBegin; 31 PetscValidHeaderSpecific(draw,PETSC_DRAW_CLASSID,1); 32 PetscValidPointer(button,2); 33 *button = PETSC_BUTTON_NONE; 34 if (!draw->ops->getmousebutton) PetscFunctionReturn(0); 35 36 ierr = (*draw->ops->getmousebutton)(draw,button,x_user,y_user,x_phys,y_phys);CHKERRQ(ierr); 37 38 ierr = MPI_Bcast((PetscEnum*)button,1,MPIU_ENUM,0,PetscObjectComm((PetscObject)draw));CHKERRQ(ierr); 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 ierr = MPI_Bcast(bcast,4,MPIU_REAL,0,PetscObjectComm((PetscObject)draw));CHKERRQ(ierr); 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(0); 49 } 50 51 52 53 54 55 56