[bug] getCellHoverComponent gets called multiple times while hovering on a cell

[claudiobosticco]

SmartClient Version: v9.0p_2013-10-13/EVAL Development Only

modify #hoverDetails sample like this:

isc.ListGrid.create({
    ID: "itemList",
    width:500, height:300, 
    alternateRecordStyles:true,

    dataSource: supplyItemWithOps,
    fetchOperation: "outputsLimitedFetch",
    autoFetchData: true,
    
    fields: [
        {name: "itemName"},
        {name: "SKU", showHover:true},
        {name: "category"}
    ],

    canHover: true,
    showHover: true,

    showHoverComponents: true,

    getCellHoverComponent : function (record, rowNum, colNum) {
      if (this.getFieldName(colNum) === "SKU") {
            if (!window.notaCanvas) {
                isc.Canvas.create({
                    ID: "notaCanvas",
                    styleName: "canvasHover",
                    width: 525
                });
            }
            supplyItemWithOps.fetchData({itemName:record.itemName},
                function (dsResponse, data, dsRequest) {
                    if (window.notaCanvas) {
                        notaCanvas.setContents(data[0].itemName);
                    }
                }
             );
            return notaCanvas;
        }
    }
});

then hover on a SKU cell, and move the mouse pointer without exiting the cell. You'll see multiple fetches in the RPC tab.
I don't know what's causing this behaviour in my sample, but I've got multiple use cases in our app, where with 8.3 this wasn't happening.

[Isomorphic]

You need to set showPrompt:false on your fetchData() call or you are showing a modal mask blocking interactivity during the fetch, which sends the grid a mouseOut and dismisses the hover.

This would have been true for any version. Most likely you changed settings when switching to 9.0.

[claudiobosticco]

yes it fixes the problem, thank you very much