Geek asks and answers

How to color cxgrid based on table value?

I would like all the lines where the name of the field "hello" to be indicated to be green. I tried this on customdrawcell:

if abstable1.fieldbyname('somename').asstring = 'Hello' then
  cxgrid.canvas.brush.color:=clGreen

But that won't work ... what am I missing here?

+3
source share
5 answers

Do not try to change the colors of the canvas in the grid. Rather - and I believe that this is always true - change the colors in the View OnDrawCell handler, as in this example:

procedure T_fmTabSnapList.View1CustomDrawCell(Sender: TcxCustomGridTableView;
  ACanvas: TcxCanvas; AViewInfo: TcxGridTableDataCellViewInfo; var ADone: Boolean);
begin
  if abstable1.fieldbyname('somename').asstring = 'Hello' then 
    ACanvas.Brush.Color := clGreen
end;

cxGrid is just a container for views. Views - this is the place where the whole picture takes place. s

+5
source

Use the OnGetContentStyle event for individual columns or a mesh object. Styles are much easier to work than messing with canvas.

+8
source

, . , OnCustomDrawCell().

procedure TForm1.YourViewCustomDrawCell(
  Sender: TcxCustomGridTableView; ACanvas: TcxCanvas;
  AViewInfo: TcxGridTableDataCellViewInfo; var ADone: Boolean);
begin
  if(AViewInfo.GridRecord.Values[YourColumn.Index] = 'Hello') then
    ACanvas.Brush.Color := clGreen;
end;
+3

Here is some working code from my program that does something like this.

procedure TDoDockets.grDocketsDrawColumnCell(Sender: TObject;
            const Rect: TRect; DataCol: Integer; Column: TColumn;
            State: TGridDrawState);
begin
 with grDockets do
  begin
   if (qDocketsOpenCost.asinteger > 1) and (datacol = 5)
    then canvas.font.color:= clRed;

   if datacol = 9 then // status
    if qDocketsColour.Value <> 0
     then Canvas.font.color:= tcolor (qDocketsColour.Value);

   if datacol = 10 then // attention
    if qDocketsAttention.asinteger = 1
     then canvas.brush.color:= clRed;

   if qDocketsUrgent.asinteger = 1 then canvas.brush.color:= 10092543;
   // light yellow
   DefaultDrawColumnCell (Rect, DataCol, Column, State);
  end
end;

grDockets is the grid, and qDockets is the request displayed in the grid. Some columns can be drawn in a different color depending on the displayed value, and in one case (qDocketsUrgent = 1) the entire background color of the line changes.

0
source 
procedure Tfm1.Grid1StylesGetContentStyle(Sender: TcxCustomGridTableView;
  ARecord: TcxCustomGridRecord; AItem: TcxCustomGridTableItem;
  out AStyle: TcxStyle);
Var
 Style1: TcxStyle;
begin
 if AItem = nil then exit;

 if ARecord.Values[Grid1Med.Index] = true then
   AStyle := cxStyleMed;

 if ARecord.Values[Grid1CP.Index] = true then
   AStyle := cxStyleHost;

 if (ARecord.Values[Grid1Med.Index] = true) and
    (ARecord.Values[Grid1CP.Index] = true) then
   AStyle := cxStyleHostAndCP;

  if not VarIsNull(ARecord.Values[colColor.Index]) then
  begin
    if not Assigned(AStyle) then
      AStyle := TcxStyle.Create(Sender);
    AStyle.Color := ARecord.Values[colColor.Index];
  end;
end;
0
source

More articles:


All Articles