library(grid) # Unit conversions stopifnot(round(convertX(unit(1, "inches"), "inches", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(2.54, "cm"), "inches", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(25.4, "mm"), "inches", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(72.27, "points"), "inches", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1/12*72.27, "picas"), "inches", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(72, "bigpts"), "inches", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1157/1238*72.27, "dida"), "inches", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1/12*1157/1238*72.27, "cicero"), "inches", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(65536*72.27, "scaledpts"), "inches", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1/2.54, "inches"), "cm", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1/25.4, "inches"), "mm", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1/72.27, "inches"), "points", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1/(1/12*72.27), "inches"), "picas", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1/72, "inches"), "bigpts", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1/(1157/1238*72.27), "inches"), "dida", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1/(1/12*1157/1238*72.27), "inches"), "cicero", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertX(unit(1/(65536*72.27), "inches"), "scaledpts", valueOnly=TRUE) - 1, digits=5) == 0) pushViewport(viewport(width=unit(1, "inches"), height=unit(2, "inches"), xscale=c(0, 1), yscale=c(1, 3))) ## Location versus dimension stopifnot(round(convertY(unit(2, "native"), "inches", valueOnly=TRUE) - 1, digits=5) == 0) stopifnot(round(convertHeight(unit(2, "native"), "inches", valueOnly=TRUE) - 2, digits=5) == 0) ## From "x" to "y" (the conversion is via "inches") stopifnot(round(convertUnit(unit(1, "native"), "native", axisFrom="x", axisTo="y", valueOnly=TRUE) - 2, digits=5) == 0) ## Convert several values at once stopifnot(all(round(convertX(unit(c(0.5, 2.54), c("npc", "cm")), c("inches", "native"), valueOnly=TRUE) - c(0.5, 1), digits=5) == 0)) popViewport() # packing a frame inside a frame fg <- frameGrob() fg <- packGrob(fg, textGrob("Hi there")) fg2 <- frameGrob() fg2 <- packGrob(fg2, fg) fg2 <- packGrob(fg2, rectGrob(), side="bottom") fg2 <- packGrob(fg2, rectGrob(height=unit(1, "inches")), side="top") stopifnot(convertHeight(fg2$framevp$layout$heights, "inches", valueOnly=TRUE)[2] < 1) # Regression tests for: # A: grob[X|Y|Width|Height] # B: grid.[circle|lines|segments|rect|polygon|text|xspline|points] # C: at angles seq(0, 360, 45)[-1] # D: single AND multiple output # In each casem, set up a situation where the answer is (easily) known, # then compare the numeric answer test <- function(x, y) { on.exit(cat(paste("x =", x, " ; y =", y, "\n"))) stopifnot(isTRUE(all.equal(x, y))) } testX <- function(x1, x2) { test(convertX(x1, "inches", valueOnly=TRUE), convertX(x2, "inches", valueOnly=TRUE)) } testY <- function(y1, y2) { test(convertY(y1, "inches", valueOnly=TRUE), convertY(y2, "inches", valueOnly=TRUE)) } testWidth <- function(w1, w2) { test(convertWidth(w1, "inches", valueOnly=TRUE), convertWidth(w2, "inches", valueOnly=TRUE)) } testHeight <- function(h1, h2) { test(convertHeight(h1, "inches", valueOnly=TRUE), convertHeight(h2, "inches", valueOnly=TRUE)) } ######## # CIRCLE ######## # A = X; B = circle; C = ALL; D = BOTH for (theta in seq(0, 360, 45)[-1]) { testX(grobX(circleGrob(r=unit(.5, "inches")), theta), unit(.5, "npc") + cos(theta/180*pi)*unit(.5, "inches")) # Bounding box is 1" by 1" testX(grobX(circleGrob(x=unit(.5, "npc") + unit(c(-.25, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, .25), "inches"), r=unit(.25, "inches")), theta), switch(as.character(theta), "360"=, "315"=, "45"=unit(.5, "npc") + unit(.5, "inches"), "180"=, "225"=, "135"=unit(.5, "npc") - unit(.5, "inches"), "90"=, "270"=unit(.5, "npc"))) } # A = Y; B = circle; C = ALL; D = BOTH for (theta in seq(0, 360, 45)[-1]) { testY(grobY(circleGrob(r=unit(.5, "inches")), theta), unit(.5, "npc") + sin(theta/180*pi)*unit(.5, "inches")) # Bounding box is 1" by 1" testY(grobY(circleGrob(x=unit(.5, "npc") + unit(c(-.25, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, .25), "inches"), r=unit(.25, "inches")), theta), switch(as.character(theta), "90"=, "135"=, "45"=unit(.5, "npc") + unit(.5, "inches"), "270"=, "315"=, "225"=unit(.5, "npc") - unit(.5, "inches"), "180"=, "360"=unit(.5, "npc"))) } # A = Width; B = circle; C = ALL; D = BOTH testWidth(grobWidth(circleGrob(r=unit(.5, "inches"))), unit(1, "inches")) testWidth(grobWidth(circleGrob(x=unit(.5, "npc") + unit(c(-.25, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, .25), "inches"), r=unit(.25, "inches"))), unit(1, "inches")) # A = Height; B = circle; C = ALL; D = BOTH testHeight(grobHeight(circleGrob(r=unit(.5, "inches"))), unit(1, "inches")) testHeight(grobHeight(circleGrob(x=unit(.5, "npc") + unit(c(-.25, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, .25), "inches"), r=unit(.25, "inches"))), unit(1, "inches")) ######## # RECT ######## # A = X; B = rect; C = ALL; D = BOTH for (theta in seq(0, 360, 45)[-1]) { testX(grobX(rectGrob(width=unit(1, "inches"), height=unit(1, "inches")), theta), switch(as.character(theta), "360"=, "315"=, "45"=unit(.5, "npc") + unit(.5, "inches"), "180"=, "225"=, "135"=unit(.5, "npc") - unit(.5, "inches"), "90"=, "270"=unit(.5, "npc"))) # Bounding box is 1" by 1" testX(grobX(rectGrob(x=unit(.5, "npc") + unit(c(-.25, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, .25), "inches"), width=unit(.5, "inches"), height=unit(.5, "inches")), theta), switch(as.character(theta), "360"=, "315"=, "45"=unit(.5, "npc") + unit(.5, "inches"), "180"=, "225"=, "135"=unit(.5, "npc") - unit(.5, "inches"), "90"=, "270"=unit(.5, "npc"))) } # A = Y; B = rect; C = ALL; D = BOTH for (theta in seq(0, 360, 45)[-1]) { testY(grobY(rectGrob(width=unit(1, "inches"), height=unit(1, "inches")), theta), switch(as.character(theta), "90"=, "135"=, "45"=unit(.5, "npc") + unit(.5, "inches"), "270"=, "315"=, "225"=unit(.5, "npc") - unit(.5, "inches"), "180"=, "360"=unit(.5, "npc"))) # Bounding box is 1" by 1" testY(grobY(rectGrob(x=unit(.5, "npc") + unit(c(-.25, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, .25), "inches"), width=unit(.5, "inches"), height=unit(.5, "inches")), theta), switch(as.character(theta), "90"=, "135"=, "45"=unit(.5, "npc") + unit(.5, "inches"), "270"=, "315"=, "225"=unit(.5, "npc") - unit(.5, "inches"), "180"=, "360"=unit(.5, "npc"))) } # A = Width; B = rect; C = ALL; D = BOTH testWidth(grobWidth(rectGrob(width=unit(1, "inches"), height=unit(1, "inches"))), unit(1, "inches")) testWidth(grobWidth(rectGrob(x=unit(.5, "npc") + unit(c(-.25, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, .25), "inches"), width=unit(.5, "inches"), height=unit(.5, "inches"))), unit(1, "inches")) # A = Height; B = rect; C = ALL; D = BOTH testHeight(grobHeight(rectGrob(width=unit(1, "inches"), height=unit(1, "inches"))), unit(1, "inches")) testHeight(grobHeight(rectGrob(x=unit(.5, "npc") + unit(c(-.25, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, .25), "inches"), width=unit(.5, "inches"), height=unit(.5, "inches"))), unit(1, "inches")) ######## # polygon # Four locations in a diamond ######## # A = X; B = polygon; C = ALL; D = BOTH for (theta in seq(0, 360, 45)[-1]) { testX(grobX(polygonGrob(x=unit(.5, "npc") + unit(c(-.5, 0, .5, 0), "inches"), y=unit(.5, "npc") + unit(c(0, -.5, 0, .5), "inches")), theta), switch(as.character(theta), "45"=, "315"=unit(.5, "npc") + unit(.25, "inches"), "90"=, "270"=unit(.5, "npc"), "135"=, "225"=unit(.5, "npc") - unit(.25, "inches"), "180"=unit(.5, "npc") - unit(.5, "inches"), "360"=unit(.5, "npc") + unit(.5, "inches"))) # NOTE: for polygons, even if there are multiple polygons, # we still produce edge of hull for ALL points testX(grobX(polygonGrob(x=unit(.5, "npc") + unit(c(-.5, -.25, 0, -.25, 0, .25, .5, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, -.5, -.25, 0, .25, 0, .25, .5), "inches"), id=rep(1:2, each=4)), theta), switch(as.character(theta), "45"=unit(.5, "npc") + unit(.375, "inches"), "90"=unit(.5, "npc"), "135"=unit(.5, "npc") - unit(.125, "inches"), "180"=unit(.5, "npc") - unit(.25, "inches"), "225"=unit(.5, "npc") - unit(.375, "inches"), "270"=unit(.5, "npc"), "315"=unit(.5, "npc") + unit(.125, "inches"), "360"=unit(.5, "npc") + unit(.25, "inches"))) } # A = Y; B = polygon; C = ALL; D = BOTH for (theta in seq(0, 360, 45)[-1]) { testY(grobY(polygonGrob(x=unit(.5, "npc") + unit(c(-.5, 0, .5, 0), "inches"), y=unit(.5, "npc") + unit(c(0, -.5, 0, .5), "inches")), theta), switch(as.character(theta), "45"=, "135"=unit(.5, "npc") + unit(.25, "inches"), "90"=unit(.5, "npc") + unit(.5, "inches"), "180"=, "360"=unit(.5, "npc"), "225"=, "315"=unit(.5, "npc") - unit(.25, "inches"), "270"=unit(.5, "npc") - unit(.5, "inches"))) # NOTE: for polygons, even if there are multiple polygons, # we still produce edge of hull for ALL points testY(grobY(polygonGrob(x=unit(.5, "npc") + unit(c(-.5, -.25, 0, -.25, 0, .25, .5, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, -.5, -.25, 0, .25, 0, .25, .5), "inches"), id=rep(1:2, each=4)), theta), switch(as.character(theta), "45"=unit(.5, "npc") + unit(.375, "inches"), "90"=unit(.5, "npc") + unit(.25, "inches"), "135"=unit(.5, "npc") + unit(.125, "inches"), "180"=unit(.5, "npc"), "225"=unit(.5, "npc") - unit(.375, "inches"), "270"=unit(.5, "npc") - unit(.25, "inches"), "315"=unit(.5, "npc") - unit(.125, "inches"), "360"=unit(.5, "npc"))) } # A = Width; B = polygon; C = ALL; D = BOTH testWidth(grobWidth(polygonGrob(x=unit(.5, "npc") + unit(c(-.5, 0, .5, 0), "inches"), y=unit(.5, "npc") + unit(c(0, -.5, 0, .5), "inches"))), unit(1, "inches")) testWidth(grobWidth(polygonGrob(x=unit(.5, "npc") + unit(c(-.5, -.25, 0, -.25, 0, .25, .5, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, -.5, -.25, 0, .25, 0, .25, .5), "inches"), id=rep(1:2, each=4))), unit(1, "inches")) # A = Height; B = polygon; C = ALL; D = BOTH testHeight(grobHeight(polygonGrob(x=unit(.5, "npc") + unit(c(-.5, 0, .5, 0), "inches"), y=unit(.5, "npc") + unit(c(0, -.5, 0, .5), "inches"))), unit(1, "inches")) testHeight(grobHeight(polygonGrob(x=unit(.5, "npc") + unit(c(-.5, -.25, 0, -.25, 0, .25, .5, .25), "inches"), y=unit(.5, "npc") + unit(c(-.25, -.5, -.25, 0, .25, 0, .25, .5), "inches"), id=rep(1:2, each=4))), unit(1, "inches")) ######## # TEXT ######## # A = X; B = text; C = ALL; D = BOTH str <- "testcase" strw <- stringWidth(str) strh <- stringHeight(str) for (theta in seq(0, 360, 45)[-1]) { testX(grobX(textGrob(str), theta), switch(as.character(theta), "360"=unit(.5, "npc") + 0.5*strw, "135"=, "45"=unit(.5, "npc") + 1/tan(theta/180*pi)*0.5*strh, "315"=, "225"=unit(.5, "npc") - 1/tan(theta/180*pi)*0.5*strh, "180"=unit(.5, "npc") - 0.5*strw, "90"=, "270"=unit(.5, "npc"))) # Bounding box is 1" by 1" testX(grobX(textGrob(str, x=unit(.5, "npc") + unit(c(-.5, .5), "inches"), y=unit(.5, "npc") + unit(c(-.5, .5), "inches"), hjust=c(0, 1), vjust=c(0, 1)), theta), switch(as.character(theta), "360"=, "315"=, "45"=unit(.5, "npc") + unit(.5, "inches"), "180"=, "225"=, "135"=unit(.5, "npc") - unit(.5, "inches"), "90"=, "270"=unit(.5, "npc"))) } # A = Y; B = text; C = ALL; D = BOTH for (theta in seq(0, 360, 45)[-1]) { testY(grobY(textGrob(str), theta), switch(as.character(theta), "90"=, "135"=, "45"=unit(.5, "npc") + 0.5*strh, "270"=, "315"=, "225"=unit(.5, "npc") - 0.5*strh, "180"=, "360"=unit(.5, "npc"))) # Bounding box is 1" by 1" testY(grobY(textGrob(str, x=unit(.5, "npc") + unit(c(-.5, .5), "inches"), y=unit(.5, "npc") + unit(c(-.5, .5), "inches"), hjust=c(0, 1), vjust=c(0, 1)), theta), switch(as.character(theta), "90"=, "135"=, "45"=unit(.5, "npc") + unit(.5, "inches"), "270"=, "315"=, "225"=unit(.5, "npc") - unit(.5, "inches"), "180"=, "360"=unit(.5, "npc"))) } # A = Width; B = text; C = ALL; D = BOTH testWidth(grobWidth(textGrob(str)), strw) testWidth(grobWidth(textGrob(str, x=unit(.5, "npc") + unit(c(-.5, .5), "inches"), y=unit(.5, "npc") + unit(c(-.5, .5), "inches"), hjust=c(0, 1), vjust=c(0, 1))), unit(1, "inches")) # A = Height; B = text; C = ALL; D = BOTH testHeight(grobHeight(textGrob(str)), strh) testHeight(grobHeight(textGrob(str, x=unit(.5, "npc") + unit(c(-.5, .5), "inches"), y=unit(.5, "npc") + unit(c(-.5, .5), "inches"), hjust=c(0, 1), vjust=c(0, 1))), unit(1, "inches")) # Determining unit lengths stopifnot(length(unit.c(unit(1, "npc") + unit(1, "cm"), unit(2, "cm"))) == 2) stopifnot(length(unit.c(unit(1, "npc") + unit(1, "cm"), unit(2:4, "cm"))) == 4) stopifnot(length(unit.c(unit(1:3, "npc") + unit(1, "cm"), unit(2:4, "cm"))) == 6)