怎么判断cxGridDBBandedTableView 点击的是第几列

Posted 2023-05-15

参考技术A 其实这个方法就是cxGrid范例中提供的，原范例在CellLevelMultiselectDemo目录下
把cxGridView里OptionsView选项中的两项修改成如下
OptionsView.Indicator = True
OptionsView.IndicatorWidth = 40//宽度
在customDrawIndicatorCell事件中填写
procedure TForm1.cxGrid1BandedTableView1CustomDrawIndicatorCell(
Sender: TcxGridTableView; ACanvas: TcxCanvas;
AViewInfo: TcxCustomGridIndicatorItemViewInfo; var ADone: Boolean);
var
AIndicatorViewInfo: TcxGridIndicatorRowItemViewInfo;
ATextRect: TRect;
// AStyle: TcxStyle;
aCV:TcxCanvas;
begin
if not (AViewInfo is TcxGridIndicatorRowItemViewInfo) then
Exit;
aCV:=ACanvas ;
ATextRect := AViewInfo.ContentBounds;
AIndicatorViewInfo := AViewInfo as TcxGridIndicatorRowItemViewInfo;
InflateRect(ATextRect, -2, -1);

lua cjson 怎么判断null

参考技术A if(jQuery.isEmptyObject(json))
console.log("为空");