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挂起绘制与恢复绘制

每当表单中包含变更时，SpreadJS 会自动刷新。

当用户计划同时集成许多变更时，由于引发 SpreadJS 多次反复绘制，会大大降低性能，因此，建议使用 suspendPaint 方法和 resumePaint 方法控制绘制次数。

进行修改时，suspendPaint 方法允许用户停止重新绘制过程。

整合所有变更后，用户可以调用 resumePaint 方法一次性绘制所有变更。

请参考以下代码段，以使用 suspendPaint 方法和 resumePaint 方法。

var spread = new GC.Spread.Sheets.Workbook(document.getElementById('ss'), {
    sheetCount: 1
});
var sheet = spread.getSheet(0);
spread.suspendPaint();
spread.suspendEvent();
sheet.setRowCount(10000);
sheet.setColumnCount(100);
for (var i = 0; i < 10000; i++) {
    for (var j = 0; j < 100; j++) {
        sheet.setValue(i, j, new Date(), GC.Spread.Sheets.SheetArea.viewport);
        sheet.getCell(i, j).formatter("yyyy/mm/dd");
        sheet.setColumnWidth(j, 80.0, GC.Spread.Sheets.SheetArea.viewport);
    }
}
spread.resumeEvent();
spread.resumePaint();