它可能是基本的,但我有一个* * 的时间来查找示例代码,以根据 Firemonkey 中的数据库中的值更改字符串网格的行颜色。我有来自MDB 的数据没有问题,但需要该行是某些颜色,即'1' = 红色'2' = 绿色等。我知道我必须以某种方式访问样式元素'OnApplyStyleLookup'?但在什么阶段。我已经看到有关更改文本样式和颜色等的问题,但我正在为自己挖一个洞,试图找到“背景”元素并应用。任何帮助将不胜感激。干杯理查德......(Firemonkey的新手)
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2 回答
4
{OnDrawColumnCell event}
procedure OnDrawColumnCell(Sender: TObject;
const Canvas: TCanvas; const Column: TColumn; const Bounds: TRectF;
const Row: Integer; const Value: TValue; const State: TGridDrawStates);
var
RowColor : TBrush;
begin
RowColor := Tbrush.Create(TBrushKind.Solid,TAlphaColors.Alpha);
{you can check for values and then set the color you want}
if Value.ToString = 'red' then
RowColor.Color := TAlphaColors.Red;
Canvas.FillRect(Bounds, 0, 0, [], 1, RowColor);
{ perform default drawing }
TGrid(Sender).DefaultDrawColumnCell(Canvas, Column, Bounds, Row,
Value, State);
end;
于 2014-08-22T17:08:11.520 回答
0
这是我在 Delphi Berlin 的代码,效果很好:
var
aRowColor: TBrush;
begin
//it's better to write this line into create
aRowColor := Tbrush.Create(TBrushKind.Solid,TAlphaColors.Alpha);
//-----
grid.DefaultDrawing := False;
if (myTbl.RcrdDataCount > 0) and (Row < myTbl.RcrdDataCount) then begin
if myTbl.RcrdDataItems[Row].State = TStateDeleted then begin
aRowColor.Color := TAlphaColors.Red;
end
else begin
aRowColor.Color := TAlphaColors.Gray;
end;
Canvas.FillRect(Bounds, 0, 0, [], 1, aRowColor);
Column.DefaultDrawCell(Canvas, Bounds, Row, Value, State);
end;
//it's better to write this line into destroy
aRowColor.free;
//-----
end;
于 2016-10-06T10:12:32.623 回答