javascript - 如何在 handsontable 的上下文菜单中添加具有默认项目的自定义项目

Question

我尝试使用 handsontable 并想将自定义项添加到上下文菜单。

实现自定义菜单的教程很多，但是忽略了默认项。

所以我添加了所有项目的 key ，但其中一些不起作用。

我的设置如下。

var basicSettings = {
    minRows: 1,
    minCols: 1,
    rowHeaders: false,
    colHeaders: false,
    hiddenColumns: true,
    contextMenu: {
        items: {
            row_above: {},
            row_below: {},
            "hsep1": "---------",
            col_left: {},
            col_right: {},
            "hsep2": "---------",
            remove_row: {},
            remove_col: {},
            "hsep3": "---------",
            undo: {},
            redo: {},
            "hsep4": "---------",
            make_read_only: {},
            "hsep5": "---------",
            alignment: {},
            "hsep6": "---------",
            copy: {},
            cut: {},
            "paste": {
                name: 'Paste',
                callback: function (key, option) {
                    this.copyPaste.triggerPaste();
                }
            },
            "hsep7": "---------",
            mergeCells: {
                name: "Merge"
            },
            "hsep8": "---------",
            // Custom menu item to set color of cells
            set_color: {
                key: "color",
                name: "Color",
                "submenu": {
                    "items": [
                        {
                            key: "color:1",
                            "name": "Black",
                            callback: function(key, options) {
                                for (var i = options[0].start.row; i <= options[0].end.row; i ++){
                                    for (var j = options[0].start.col; j <= options[0].end.col; j ++){
                                        this.getCell(i, j).className = "color-black";
                                    }
                                }
                            }
                        }, {
                            key: "color:2",
                            "name": "White",
                            callback: function(key, options) {
                                for (var i = options[0].start.row; i <= options[0].end.row; i ++){
                                    for (var j = options[0].start.col; j <= options[0].end.col; j ++){
                                        $(this.getCell(i, j)).removeClass("color-*").addClass("color-white");
                                    }
                                }
                                this.render();
                            }
                        }, {
                            key: "color:3",
                            "name": "Red",
                            callback: function(key, options) {
                                for (var i = options[0].start.row; i <= options[0].end.row; i ++){
                                    for (var j = options[0].start.col; j <= options[0].end.col; j ++){
                                        this.getCell(i, j).style.backgroundColor = "red";
                                    }
                                }
                                this.render();
                            }
                        }
                    ]
                }
            }
        }
    },
    manualRowResize: true,
    manualColumnResize: true,
    contextMenuCopyPaste: {
        swfPath: '/bower_components/zeroclipboard/dist/ZeroClipboard.swf'
    },
    copyPaste: true,
    mergeCells: true,
    search: true,
    stretchH: 'all',
    autoColumnSize: {useHeaders: true},
    autoRowSize: {syncLimit: 300},
    width: 1000,
    height: window.innerHeight - 100,
    licenseKey: "xxxxx-xxxxx-xxxxx-xxxxx-xxxxx"
};

菜单看起来像这样。

问题一:

有什么方法可以在所有默认菜单项中添加自定义项吗？如果是这样，我不需要回答问题 3 和问题 4。

问题2:

让我问这个问题的最重要的部分是自定义菜单，即“set_color”。单击“黑色”或“红色”后，它变成那种颜色，但在我更改单元格的值后，它又变回原来的颜色。如何防止单元格恢复其背景颜色？

问题 3:

除了启用所有功能外，我还想要其他自定义项。但是我找不到“合并”项目的正确 key 。当前的“合并”功能工作起来很奇怪。如何使功能正常运行？

问题4:

我试过了 https://github.com/handsontable/handsontable/issues/2853实现粘贴功能，但我看到了这个错误。

未捕获的类型错误:无法读取未定义的属性“triggerPaste”

请帮助我了解那些可上手的用法。提前致谢。

Answer 1

对于问题 1:

Is there any way to add custom item with all the default menu items? If so, I don't need answers to Question 3 and Question 4.

初始化 Handsontable 并将 contextMenu 设置为 true。示例:

  let
    example3 = document.getElementById('example3'),
    settings3,
    hot3;

  settings3 = {
    data: [...],
    rowHeaders: true,
    colHeaders: true,
    contextMenu: true // set to `true`..
  };
  hot3 = new Handsontable(example3, settings3);

然后像这样更新 contextMenu 设置:

  let cm = hot3.getPlugin('ContextMenu');
  hot3.updateSettings({
    contextMenu: {
        // Clone the pre-defined items and add your custom items.
      items: Object.assign({}, cm.itemsFactory.predefinedItems, {
        'hsep1': '---------',
        'set_color': {
            key: 'color',
            name: 'Color',
          submenu: {
            items: [{
              key: 'color:red',
              name: 'Red',
              callback: setCellColor
            }, {
              key: 'color:blue',
              name: 'Blue',
              callback: setCellColor
            }]
          }
        }
      })
    }
  });

对于问题2:

The most important part that let me ask this question is custom menu, that is "set_color". After clicking "Black" or "Red", it turns into that color, but after I change value of a cell, it turns back. How can I prevent the cells from turning their background color back?

我不确定如何防止；但是，这里有一种方法可以恢复相应单元格的颜色(或任何其他自定义/元数据..)。

  // This is my callback for the 'set_color' context menu items.
  // Sample `key`: 'color:red'
  function setCellColor(key, opt) {
    let color = key.substring(6);
    for (let i = opt[0].start.row; i <= opt[0].end.row; i++) {
      for (let j = opt[0].start.col; j <= opt[0].end.col; j++) {
        this.getCell(i, j).style.color = color;
        this.setCellMeta(i, j, 'color', color); // Save the color
      }
    }
  }

  // Listen to the `beforeRenderer` event, and restore the cell's color
  // before the "renderer" starting rendering the cell
  Handsontable.hooks.add('beforeRenderer', function(td, r, c, p, pv, cp){
    if (cp.color) {
        td.style.color = cp.color;
    }
  }, hot3);

演示

在此处尝试完整示例:http://jsfiddle.net/y9j3m29c/1/ , 这是基于 https://docs.handsontable.com/3.0.0/demo-context-menu.html#page-custom

对于粘贴功能:

加载SheetClip():

<script src="https://unpkg.com/sheetclip"></script>

添加必要的变量:

let clipboardCache = '';
const sheetclip = new SheetClip();

添加必要的回调:

  settings3 = {
    ...
    afterCopy: function(changes){
        clipboardCache = sheetclip.stringify(changes);
    },
    afterCut: function(changes){
        clipboardCache = sheetclip.stringify(changes);
    },
    afterPaste: function(changes){
        clipboardCache = sheetclip.stringify(changes);
    }
  };

添加上下文菜单项:

  let cm = hot3.getPlugin('ContextMenu');
  hot3.updateSettings({
    contextMenu: {
        // Clone the pre-defined items and add your custom items.
      items: Object.assign({}, cm.itemsFactory.predefinedItems, {
        ...
        'paste': {
            name: 'Paste',
          disabled: function(){
            return clipboardCache.length === 0;
          },
          callback: function(){
            var plugin = this.getPlugin('copyPaste');

            this.listen();
            plugin.paste(clipboardCache);
          }
        }
      })
    }
  });

有关 https://docs.handsontable.com/3.0.0/demo-copy-paste.html#paste-in-context-menu 的更多详细信息和演示 http://jsfiddle.net/y9j3m29c/2/ — 或 http://jsfiddle.net/y9j3m29c/4/它带有“清除剪贴板”功能。