如何调整 rhandsontable 中显示图像的大小？

Question

我正在尝试在 rhandsontable 中显示图像。图片大小不一。我想将图像的显示尺寸标准化为单一尺寸。在这方面，我需要有关如何调整 rhandsontable 中图像显示大小的帮助。

library(rhandsontable)

DF = data.frame(
  comments = c(
    "I would rate it &#x2605;&#x2605;&#x2605;&#x2605;&#x2606;",
    "This is the book about JavaScript"
  ), 
  cover = c(
    "http://ecx.images-amazon.com/images/I/51bRhyVTVGL._SL50_.jpg",
    "http://ecx.images-amazon.com/images/I/51gdVAEfPUL._SL50_.jpg",
 ),
 stringsAsFactors = FALSE
)

rhandsontable(DF, allowedTags = "<em><b><strong><a><big>", 
              width = 800, height = 450, rowHeaders = FALSE) %>%
  hot_cols(colWidths = c(200, 80)) %>%
  hot_col(1, renderer = htmlwidgets::JS("safeHtmlRenderer")) %>%
  hot_col(2, renderer = "
    function(instance, td, row, col, prop, value, cellProperties) {
      var escaped = Handsontable.helper.stringify(value),
        img;
  
      if (escaped.indexOf('http') === 0) {
        img = document.createElement('IMG');
        img.src = value;
  
        Handsontable.dom.addEvent(img, 'mousedown', function (e){
          e.preventDefault(); // prevent selection quirk
        });
  
        Handsontable.dom.empty(td);
        td.appendChild(img);
      }
      else {
        // render as text
        Handsontable.renderers.TextRenderer.apply(this, arguments);
      }
  
      return td;
    }")

Answer 1

将宽度和高度 (img.style.width = '80px'; img.style.height = '80px';) 添加到图像属性解决了问题。

library(rhandsontable)

DF = data.frame(
  comments = c(
    "I would rate it &#x2605;&#x2605;&#x2605;&#x2605;&#x2606;",
    "This is the book about JavaScript"
  ), 
  cover = c(
    "http://ecx.images-amazon.com/images/I/51bRhyVTVGL._SL50_.jpg",
    "http://ecx.images-amazon.com/images/I/51gdVAEfPUL._SL50_.jpg",
 ),
 stringsAsFactors = FALSE
)

rhandsontable(DF, allowedTags = "<em><b><strong><a><big>", 
              width = 800, height = 450, rowHeaders = FALSE) %>%
  hot_cols(colWidths = c(200, 80)) %>%
  hot_col(1, renderer = htmlwidgets::JS("safeHtmlRenderer")) %>%
  hot_col(2, renderer = "
    function(instance, td, row, col, prop, value, cellProperties) {
      var escaped = Handsontable.helper.stringify(value),
        img;
  
      if (escaped.indexOf('http') === 0) {
        img = document.createElement('IMG');
        img.src = value; img.style.width = '80px'; img.style.height = '80px';
  
        Handsontable.dom.addEvent(img, 'mousedown', function (e){
          e.preventDefault(); // prevent selection quirk
        });
  
        Handsontable.dom.empty(td);
        td.appendChild(img);
      }
      else {
        // render as text
        Handsontable.renderers.TextRenderer.apply(this, arguments);
      }
  
      return td;
    }")

如何调整 rhandsontable 中显示图像的大小？

How to adjust size of the displayed image in rhandsontable?

r

rhandsontable