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在用SpreadJS进行开发时,有些小伙伴需要判断滚动条是否快滚动到底部或最右侧,在进行一些相应的提示。
SpreadJS 中提供两个事件:LeftColumnChanged、TopRowChanged
在最左侧列,或最顶行改变时会触发这两个事件,所以可以根据触发这个事件时返回的oldTopRow、newTopRow 等参数进行判断,是否滚动到了最后行、列。
情况一:滚动条设置: spread.options.scrollbarMaxAlign = false 此设置为默认设置
在这种情况中,表单最后一行可以滚动到最顶端,判断返回的newTopRow是否为 总行数,即可判断是否滚动到了最后一行。
sheet.bind(GC.Spread.Sheets.Events.TopRowChanged, function(s,e) {
var rowCount = sheet.getRowCount()
if (args.newTopRow=== rowCount - 1) {
console.log('滚动到底部了');
}
})
情况二:滚动条设置: spread.options.scrollbarMaxAlign = true 此设置下,表格无法将最后一行滚动至最顶部,故无法用args.newTopRow=== rowCount - 1进行判断。这种情况下可以用getViewportTopRow方法获取视图顶部行索引,进行判断
sheet.bind(GC.Spread.Sheets.Events.TopRowChanged, function(s,e) {
var row = sheet.getViewportTopRow(1);
console.log(row)
var rowCount = sheet.getRowCount()
if (row === rowCount - 1) {
console.log('滚动到底部了');
}
});
作者: GrapeCity China | 审核:Richard.Ma | 更新时间:2023.11.15