YOUSEFUL / DELPHI / COMPONENTS

`TAtlasGridHit`

The result of TAtlasVirtualGrid.HitTest: area, column and row under a point.

Record Unit Atlas.VGrid · Product Atlas Virtual Grid

Description

Returned by HitTest(X, Y) of TAtlasVirtualGrid. Frozen columns lie on top of scrolled ones and are tested first.

Members

Member	Kind	What it does
`Area`	field	What is under the point.
`Column`	field	Index into `Columns`, or -1 for `gaNone`.
`Row`	field	The row as shown for `gaCell`; -1 otherwise.

Fields

`Area` field

Area: TAtlasGridArea;

What is under the point. See TAtlasGridArea.

`Column` field

Column, Row: Integer;

Index into Columns, or -1 for gaNone.

`Row` field

Column, Row: Integer;

The row as shown for gaCell; -1 otherwise.

Examples

Describe a point

Uses Area, Column and Row.

uses System.SysUtils, Atlas.VGrid;

function DescribePoint(Grid: TAtlasVirtualGrid; X, Y: Integer): string;
var Hit: TAtlasGridHit;
begin
  Hit := Grid.HitTest(X, Y);
  case Hit.Area of
    gaBand: Result := 'band ' + Grid.Columns[Hit.Column].Band;
    gaHeader: Result := 'title of column ' + IntToStr(Hit.Column);
    gaDivider: Result := 'right border of column ' + IntToStr(Hit.Column);
    gaCell: Result := 'cell ' + Grid.CellText(Hit.Column, Hit.Row);
    gaFooter: Result := 'total ' + Grid.TotalText(Hit.Column);
  else
    Result := 'nothing';
  end;
end;

TAtlasGridArea · TAtlasVirtualGrid

Also in Atlas Virtual Grid

TAtlasVirtualGrid · TAtlasMemoryData · TAtlasVirtualData · TAtlasPlotData

TAtlasGridHit