15c6c1daeSBarry Smith 25c6c1daeSBarry Smith #include <petscdraw.h> /*I "petscdraw.h" I*/ 35c6c1daeSBarry Smith 45c6c1daeSBarry Smith /*@C 55c6c1daeSBarry Smith PetscDrawZoom - Allows one to create a graphic that users may zoom into. 65c6c1daeSBarry Smith 75c6c1daeSBarry Smith Collective on PetscDraw 85c6c1daeSBarry Smith 95c6c1daeSBarry Smith Input Parameters: 105c6c1daeSBarry Smith + draw - the window where the graph will be made. 115c6c1daeSBarry Smith . func - users function that draws the graphic 125c6c1daeSBarry Smith - ctx - pointer to any user required data 135c6c1daeSBarry Smith 145c6c1daeSBarry Smith Level: advanced 155c6c1daeSBarry Smith 165c6c1daeSBarry Smith .seealso: 175c6c1daeSBarry Smith @*/ 185c6c1daeSBarry Smith PetscErrorCode PetscDrawZoom(PetscDraw draw,PetscErrorCode (*func)(PetscDraw,void*),void *ctx) 195c6c1daeSBarry Smith { 205c6c1daeSBarry Smith PetscDrawButton button; 215c6c1daeSBarry Smith PetscReal dpause,xc,yc,scale = 1.0,w,h,xr,xl,yr,yl,xmin,xmax,ymin,ymax; 225c6c1daeSBarry Smith PetscBool isnull; 235f80ce2aSJacob Faibussowitsch PetscErrorCode ierr; 245c6c1daeSBarry Smith 255c6c1daeSBarry Smith PetscFunctionBegin; 26*9566063dSJacob Faibussowitsch PetscCall(PetscDrawIsNull(draw,&isnull)); 275c6c1daeSBarry Smith if (isnull) PetscFunctionReturn(0); 285c6c1daeSBarry Smith 29*9566063dSJacob Faibussowitsch PetscCall(PetscDrawCheckResizedWindow(draw)); 30*9566063dSJacob Faibussowitsch PetscCall(PetscDrawClear(draw)); 31*9566063dSJacob Faibussowitsch ierr = PetscDrawCollectiveBegin(draw);PetscCall(ierr); 32*9566063dSJacob Faibussowitsch PetscCall((*func)(draw,ctx)); 33*9566063dSJacob Faibussowitsch ierr = PetscDrawCollectiveEnd(draw);PetscCall(ierr); 34*9566063dSJacob Faibussowitsch PetscCall(PetscDrawFlush(draw)); 355c6c1daeSBarry Smith 36*9566063dSJacob Faibussowitsch PetscCall(PetscDrawGetPause(draw,&dpause)); 375c6c1daeSBarry Smith if (dpause >= 0) { 38*9566063dSJacob Faibussowitsch PetscCall(PetscSleep(dpause)); 395c6c1daeSBarry Smith goto theend; 405c6c1daeSBarry Smith } 415c6c1daeSBarry Smith if (dpause != -1) goto theend; 425c6c1daeSBarry Smith 43*9566063dSJacob Faibussowitsch PetscCall(PetscDrawGetMouseButton(draw,&button,&xc,&yc,NULL,NULL)); 44*9566063dSJacob Faibussowitsch PetscCall(PetscDrawGetCoordinates(draw,&xl,&yl,&xr,&yr)); 459f80f0efSLisandro Dalcin xmin = xl; xmax = xr; w = xr - xl; 469f80f0efSLisandro Dalcin ymin = yl; ymax = yr; h = yr - yl; 475c6c1daeSBarry Smith 48e118a51fSLisandro Dalcin while (button != PETSC_BUTTON_NONE && button != PETSC_BUTTON_RIGHT) { 499f80f0efSLisandro Dalcin switch (button) { 509f80f0efSLisandro Dalcin case PETSC_BUTTON_LEFT: scale = 0.5; break; 519f80f0efSLisandro Dalcin case PETSC_BUTTON_CENTER: scale = 2.0; break; 529f80f0efSLisandro Dalcin case PETSC_BUTTON_WHEEL_UP: scale = 8/10.; break; 539f80f0efSLisandro Dalcin case PETSC_BUTTON_WHEEL_DOWN: scale = 10/8.; break; 549f80f0efSLisandro Dalcin default: scale = 1.0; 559f80f0efSLisandro Dalcin } 565c6c1daeSBarry Smith xl = scale*(xl + w - xc) + xc - w*scale; 575c6c1daeSBarry Smith xr = scale*(xr - w - xc) + xc + w*scale; 585c6c1daeSBarry Smith yl = scale*(yl + h - yc) + yc - h*scale; 595c6c1daeSBarry Smith yr = scale*(yr - h - yc) + yc + h*scale; 605c6c1daeSBarry Smith w *= scale; h *= scale; 61*9566063dSJacob Faibussowitsch PetscCall(PetscDrawClear(draw)); 62*9566063dSJacob Faibussowitsch PetscCall(PetscDrawSetCoordinates(draw,xl,yl,xr,yr)); 63*9566063dSJacob Faibussowitsch ierr = PetscDrawCollectiveBegin(draw);PetscCall(ierr); 64*9566063dSJacob Faibussowitsch PetscCall((*func)(draw,ctx)); 65*9566063dSJacob Faibussowitsch ierr = PetscDrawCollectiveEnd(draw);PetscCall(ierr); 66*9566063dSJacob Faibussowitsch PetscCall(PetscDrawFlush(draw)); 67*9566063dSJacob Faibussowitsch PetscCall(PetscDrawGetMouseButton(draw,&button,&xc,&yc,NULL,NULL)); 685c6c1daeSBarry Smith } 69*9566063dSJacob Faibussowitsch PetscCall(PetscDrawSetCoordinates(draw,xmin,ymin,xmax,ymax)); 705c6c1daeSBarry Smith theend: 715c6c1daeSBarry Smith PetscFunctionReturn(0); 725c6c1daeSBarry Smith } 73