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Article #16790: How can I activate different hints for each cell in a grid

 Question and Answer Database

FAQ1790D.txt   How can I activate different hints for each cell in a grid
Category   :VCL
Platform    :All
Product    :All 32 bit  

Question:
How can I activate different hints for each cell in a grid
control?


Answer:
The following example demonstrates tracking the mouse movements in
a StringGrid component. If the mouse moves to a different cell in the
grid, a new hint window is displayed, showing the row and column
numbers of the cell.

Example:

type
  TForm1 = class(TForm)
    StringGrid1: TStringGrid;
    procedure StringGrid1MouseMove(Sender: TObject;
      Shift: TShiftState; X, Y: Integer);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
      Col : integer;
      Row : integer;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);
begin
  StringGrid1.Hint := '0 0';
  StringGrid1.ShowHint := True;
end;

procedure TForm1.StringGrid1MouseMove(Sender: TObject;
Shift: TShiftState; X, Y: Integer);
var
  r : integer;
  c : integer;
begin
  StringGrid1.MouseToCell(X, Y, C, R);
  if ((Row <> r) or
      (Col <> c)) then begin
    Row := r;
    Col := c;
    Application.CancelHint;
    StringGrid1.Hint := IntToStr(r) + #32 + IntToStr(c);
  end;
end;


7/16/98 4:31:28 PM
 

Last Modified: 01-SEP-99