Question

我的DBGrid垂直滚动有问题。当我使用鼠标滚轮或垂直滚动条垂直滚动它时，它会向上和向下移动选定的行。我想让它滚动而不是选择行而是整个网格。就像它在Microsoft Excel中工作一样（只是为了让你知道我的意思）。有什么建议吗？

Answer 1

我不认为这是可能的，因为对我而言，DBGrids上的滚动条似乎更像是进度指示器而不是滚动条。它的行为与ListViews中滚动“页面”的滚动不同，在db控件中，即使向上或向下移动单行，滚动条也会更改以反映“当前行”/“总行”分数

Answer 2

好吧，几乎我想看到的。在swissdelhicenter.ch上找到了hanuleye的帖子。这段代码让你可以用鼠标滚轮自由滚动DBGrid。

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Grids, DBGrids, DB, DBTables;

type
  TForm1 = class(TForm)
    DataSource1: TDataSource;
    Table1: TTable;
    DBGrid1: TDBGrid;
    procedure FormCreate(Sender: TObject);
    procedure DBGridMouseWheel(Sender: TObject; Shift: TShiftState;
      WheelDelta: Integer; MousePos: TPoint; var Handled: Boolean);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

  TWheelDBGrid = class(TDBGrid)
  public
    property OnMouseWheel;
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
  TWheelDBGrid(DBGrid1).OnMouseWheel := DBGridMouseWheel;
end;

function GetNumScrollLines: Integer;
begin
  SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, @Result, 0);
end;

procedure TForm1.DBGridMouseWheel(Sender: TObject; Shift: TShiftState;
  WheelDelta: Integer; MousePos: TPoint; var Handled: Boolean);
var
  Direction: Shortint;
begin
  Direction := 1;
  if WheelDelta = 0 then
    Exit
  else if WheelDelta > 0 then
    Direction := -1;

  with TDBGrid(Sender) do
  begin
    if Assigned(DataSource) and Assigned(DataSource.DataSet) then
      DataSource.DataSet.MoveBy(Direction * GetNumScrollLines);
    Invalidate;
  end;
end;

end.

DBGrid滚动页面而不是行

2 个答案: