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rotate and fit scatterD3
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| library(htmltools) | |
| library(scatterD3) | |
| sd3 <- scatterD3(x = mtcars$wt, y = mtcars$mpg, data=NULL, lab = rownames(mtcars), | |
| col_var = mtcars$cyl, symbol_var = mtcars$am, | |
| xlab = "Weight", ylab = "Mpg", col_lab = "Cylinders", | |
| symbol_lab = "Manual transmission", html_id = NULL, height = 300, width = 500) | |
| browsable( | |
| tags$div( | |
| htmlwidgets::onRender( | |
| sd3, | |
| " | |
| function(el, x) { | |
| debugger | |
| // hard coded for now assuming we want to rotate 45 degrees | |
| var degrees = 45; | |
| // https://stackoverflow.com/questions/622140/calculate-bounding-box-coordinates-from-a-rotated-rectangle | |
| function fitRect( rw,rh,degrees ){ | |
| var radians = degrees * Math.PI / 180; | |
| var x1 = -rw/2, | |
| x2 = rw/2, | |
| x3 = rw/2, | |
| x4 = -rw/2, | |
| y1 = rh/2, | |
| y2 = rh/2, | |
| y3 = -rh/2, | |
| y4 = -rh/2; | |
| var x11 = x1 * Math.cos(radians) + y1 * Math.sin(radians), | |
| y11 = -x1 * Math.sin(radians) + y1 * Math.cos(radians), | |
| x21 = x2 * Math.cos(radians) + y2 * Math.sin(radians), | |
| y21 = -x2 * Math.sin(radians) + y2 * Math.cos(radians), | |
| x31 = x3 * Math.cos(radians) + y3 * Math.sin(radians), | |
| y31 = -x3 * Math.sin(radians) + y3 * Math.cos(radians), | |
| x41 = x4 * Math.cos(radians) + y4 * Math.sin(radians), | |
| y41 = -x4 * Math.sin(radians) + y4 * Math.cos(radians); | |
| var x_min = Math.min(x11,x21,x31,x41), | |
| x_max = Math.max(x11,x21,x31,x41); | |
| var y_min = Math.min(y11,y21,y31,y41); | |
| y_max = Math.max(y11,y21,y31,y41); | |
| return [x_max-x_min,y_max-y_min]; | |
| } | |
| // partial solution assuming width < height | |
| var width = el.offsetWidth; | |
| var height = el.offsetHeight; | |
| var sizes = fitRect(width, height, degrees); | |
| var newWidth = sizes[0]; | |
| var newHeight = sizes[1]; | |
| d3v4.select(el) | |
| .style('width', newWidth + 'px') | |
| .style('height', newHeight + 'px'); | |
| d3v4.select(el).select('svg') | |
| .attr('transform','rotate(' + degrees + ')') | |
| .style('margin-top', (newHeight - height) / 2) | |
| .style('margin-left', (newWidth - width) / 2) | |
| } | |
| " | |
| ) | |
| ) | |
| ) |
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