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dynIdentify <- function(x,y,labels=seq_along(x),
corners = cbind( c(-1,0,1,-1,1,-1,0,1),
c(1,1,1,0,0,-1,-1,-1) ),
...) {
lx <- x # label positions
ly <- y
lx[ is.na(labels) ] <- NA
ly[ is.na(labels) ] <- NA
llx <- lx # line end positions
lly <- ly
replot <- function() {
plot(x,y,...)
segments(x,y, llx,lly)
text(lx,ly,labels)
}
replot()
# tmp <- cnvrt.coords(x,y, input='usr')$dev
dx <- grconvertX(x, to='ndc')
dy <- grconvertY(y, to='ndc') # device coordinates of points
widths <- strwidth(labels)/2
heights <- strheight(labels)/2
ci <- 0 # current label
mouse.down <- function(buttons, x, y){
if( any(buttons==2) ){
out <- list( labels=list(x=lx, y=ly),
lineends=list(x=llx, y=lly) )
return(out)
}
# tmp <- cnvrt.coords(lx,ly, input='usr')$dev
i <- which.min( (grconvertX(lx,to='ndc')-x)^2 + (grconvertY(ly,to='ndc')-y)^2 )
ci <<- i
NULL
}
mouse.up <- function(buttons, x, y){
# tmp <- cnvrt.coords(x,y, input='dev')$usr
cx <- grconvertX(x, from='ndc')
cy <- grconvertY(y, from='ndc')
tmpx <- cx + corners[,1]*widths[ci]
tmpy <- cy + corners[,2]*heights[ci]
# tmp <- cnvrt.coords(tmpx,tmpy, input='usr')$dev
i <- which.min( (dx[ci] - grconvertX(tmpx,to='ndc'))^2 +
(dy[ci] - grconvertY(tmpy, to='ndc'))^2 )
# tmp <- lx; tmp[ci] <- cx; lx <<- tmp
# tmp <- ly; tmp[ci] <- cy; ly <<- tmp
# tmp <- llx; tmp[ci] <- tmpx[i]; llx <<- tmp
# tmp <- lly; tmp[ci] <- tmpy[i]; lly <<- tmp
lx[ci] <<- cx
ly[ci] <<- cy
llx[ci] <<- tmpx[i]
lly[ci] <<- tmpy[i]
replot()
NULL
}
out <- getGraphicsEvent( prompt= "Click on points and drag label to position. \nRight click to exit\n",
onMouseDown=mouse.down,
onMouseUp=mouse.up)
invisible(out)
}
TkIdentify <- function(x,y,labels=seq_along(x), hscale=1.75, vscale=1.75,
corners = cbind( c(-1,0,1,-1,1,-1,0,1),
c(1,1,1,0,0,-1,-1,-1) ),
...) {
if( !requireNamespace('tkrplot', quietly = TRUE) ) stop('This function depends on the tkrplot package being available')
md <- FALSE
lx <- x # label positions
ly <- y
lx[ is.na(labels) ] <- NA
ly[ is.na(labels) ] <- NA
llx <- lx # line end positions
lly <- ly
first <- TRUE
dx <- dy <- dlx <- dly <- widths <- heights <- numeric(0)
ul <- ur <- ut <- ub <- 0
replot <- function() {
plot(x,y,...)
segments(x,y, llx,lly)
text(lx,ly,labels)
if(first) {
first <<- FALSE
# tmp <- cnvrt.coords(x,y, input='usr')$dev
dx <<- grconvertX(x, to='ndc')
dy <<- grconvertY(y, to='ndc')
widths <<- strwidth(labels)/2
heights <<- strheight(labels)/2
# tmp <- cnvrt.coords(c(0,1),c(0,1), input='dev')$usr
ul <<- grconvertX(0, from='ndc')
ur <<- grconvertX(1, from='ndc')
ub <<- grconvertY(0, from='ndc')
ut <<- grconvertY(1, from='ndc')
}
# tmp <- cnvrt.coords(lx,ly, input='usr')$dev
dlx <<- grconvertX(lx, to='ndc')
dly <<- grconvertY(ly, to='ndc')
}
tt <- tcltk::tktoplevel()
tcltk::tkwm.title(tt, "TkIdentify")
img <- tkrplot::tkrplot(tt, replot, vscale=vscale, hscale=hscale)
tcltk::tkpack(img, side='top')
tcltk::tkpack( tcltk::tkbutton(tt, text='Quit', command=function() tcltk::tkdestroy(tt)),
side='right')
corners <- cbind( c(-1,0,1,-1,1,-1,0,1), c(1,1,1,0,0,-1,-1,-1) )
ci <- 0 # current label
cx <- cy <- 0
iw <- as.numeric(tcltk::tcl('image','width',tcltk::tkcget(img,'-image')))
ih <- as.numeric(tcltk::tcl('image','height',tcltk::tkcget(img,'-image')))
mouse.move <- function(x,y) {
if(md){
tx <- (as.numeric(x)-1)/iw
ty <- 1-(as.numeric(y)-1)/ih
cx <<- tx*ur + (1-tx)*ul
cy <<- ty*ut + (1-ty)*ub
# tmp <- lx; tmp[ci] <- cx; lx <<- tmp
# tmp <- ly; tmp[ci] <- cy; ly <<- tmp
lx[ci] <<- cx
ly[ci] <<- cy
tmpx <- cx + corners[,1]*widths[ci]
tmpy <- cy + corners[,2]*heights[ci]
tmpxx <- (tmpx - ul)/(ur-ul)
tmpyy <- (tmpy - ub)/(ut-ub)
i <- which.min( (dx[ci] - tmpxx)^2 +
(dy[ci] - tmpyy)^2 )
# tmp <- lx; tmp[ci] <- cx; lx <<- tmp
# tmp <- ly; tmp[ci] <- cy; ly <<- tmp
# tmp <- llx; tmp[ci] <- tmpx[i]; llx <<- tmp
# tmp <- lly; tmp[ci] <- tmpy[i]; lly <<- tmp
lx[ci] <<- cx
ly[ci] <<- cy
llx[ci] <<- tmpx[i]
lly[ci] <<- tmpy[i]
tkrplot::tkrreplot(img)
}
}
mouse.down <- function(x,y){
tx <- (as.numeric(x)-1)/iw
ty <- 1-(as.numeric(y)-1)/ih
ci <<- which.min( (tx - dlx)^2 + (ty - dly)^2 )
md <<- TRUE
mouse.move(x,y)
}
mouse.up <- function(x,y){
md <<- FALSE
}
tcltk::tkbind(img, '<Motion>', mouse.move)
tcltk::tkbind(img, '<ButtonPress-1>', mouse.down)
tcltk::tkbind(img, '<ButtonRelease-1>', mouse.up)
tcltk::tkwait.window(tt)
out <- list( labels=list(x=lx, y=ly),
lineends=list(x=llx, y=lly) )
invisible(out)
}
### old version, possibilities for the Tk version
## dynIdentify <- function(x,y,labels=seq_along(x), ...) {
## plot(x,y,...)
##
## tmp <- cnvrt.coords(x,y, input='usr')$dev
## dx <- tmp$x
## dy <- tmp$y # device coordinates of points
##
## print(dx)
## print(dy)
##
## lx <- rep(NA, length(x) ) # label positions
## ly <- rep(NA, length(y) )
## llx <- lx # line end positions
## lly <- ly
##
## widths <- strwidth(labels)/2
## heights <- strheight(labels)/2
##
## corners <- cbind( c(-1,0,1,-1,1,-1,0,1), c(1,1,1,0,0,-1,-1,-1) )
##
## md <- FALSE # mouse button down
##
## cx <- 0 # current
## cy <- 0
## ci <- 0
##
## replot <- function() {
## if(!md){return()}
## plot(x,y,...)
## segments(x,y, llx,lly)
## text(lx,ly,labels)
## }
##
## mouse.move <- function(buttons, x, y){
##
## tmp <- cnvrt.coords(x,y, input='dev')$usr
## cx <<- tmp$x
## cy <<- tmp$y
## if(md){
##
## tmpx <- cx + corners[,1]*widths[ci]
## tmpy <- cy + corners[,2]*heights[ci]
## tmp <- cnvrt.coords(tmpx,tmpy, input='usr')$dev
## i <- which.min( (dx[ci] - tmp$x)^2 +
## (dy[ci] - tmp$y)^2 )
## tmp <- lx; tmp[ci] <- cx; lx <<- tmp
## tmp <- ly; tmp[ci] <- cy; ly <<- tmp
## tmp <- llx; tmp[ci] <- tmpx[i]; llx <<- tmp
## tmp <- lly; tmp[ci] <- tmpy[i]; lly <<- tmp
## replot()
## }
## NULL
## }
##
## mouse.down <- function(buttons, x, y){
##
## if( any(buttons==2) ){
## out <- list( labels=list(x=lx, y=ly),
## lineends=list(x=llx, y=lly) )
## return(out)
## }
## i <- which.min( (dx-x)^2 + (dy-y)^2 )
## ci <<- i
## md <<- TRUE
## mouse.move(buttons, x, y)
## NULL
## }
##
## mouse.up <- function(buttons, x, y){
##
## tmp <- dx; tmp[ci] <- NA; dx <<- tmp
## tmp <- dy; tmp[ci] <- NA; dy <<- tmp
##
## if(all(is.na(dx))) {
## out <- list( labels=list(x=lx, y=ly),
## lineends=list(x=llx, y=lly) )
## return(out)
## }
##
## md <<- FALSE
## ci <<- 0
## NULL
## }
##
## out <- getGraphicsEvent( prompt= "Click on points and drag label to position.\nRight click to exit\n",
## onMouseDown=mouse.down,
## onMouseMove=mouse.move,
## onMouseUp=mouse.up)
##
## invisible(out)
## }
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