Zellen im StringGrid mit einem Fadenkreuz markieren und einfacher Zellformatierung

unit Unit1;

interface

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

type
TForm1 = class(TForm)
StringGrid1: TStringGrid;
procedure StringGrid1Click(Sender: TObject);
procedure StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer;
Rect: TRect; State: TGridDrawState);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

//////////////////////////////////////////////////////////////////////////////////////
//Zellen im StringGrid mit einem Fadenkreuz markieren und einfacher Zellformatierung

//Textausrichten mit oder ohne Zeilenumbruch im StringGrid
procedure GridAlignment(Grid: TStringGrid; Rect: TRect; ACol, ARow: Integer;
Alignment: TAlignment; LineBreak: Boolean);
var
TextOut: string;
begin
Grid.Canvas.FillRect(Rect);
TextOut := Grid.Cells[ACol, ARow];
if LineBreak = False then
begin
if Alignment = taLeftJustify then
DrawText(Grid.Canvas.Handle, PChar(TextOut), StrLen(PChar(TextOut)),
Rect, DT_LEFT);
if Alignment = taCenter then
DrawText(Grid.Canvas.Handle, PChar(TextOut), StrLen(PChar(TextOut)),
Rect, DT_CENTER);
if Alignment = taRightJustify then
DrawText(Grid.Canvas.Handle, PChar(TextOut), StrLen(PChar(TextOut)),
Rect, DT_RIGHT);
end
else
begin
if Alignment = taLeftJustify then
DrawText(Grid.Canvas.Handle, PChar(TextOut), StrLen(PChar(TextOut)),
Rect, DT_LEFT or DT_WORDBREAK);
if Alignment = taCenter then
DrawText(Grid.Canvas.Handle, PChar(TextOut), StrLen(PChar(TextOut)),
Rect, DT_CENTER or DT_WORDBREAK);
if Alignment = taRightJustify then
DrawText(Grid.Canvas.Handle, PChar(TextOut), StrLen(PChar(TextOut)),
Rect, DT_RIGHT or DT_WORDBREAK);
end;
end;

//Fadenkreuz im Stringgrid erzeugen
procedure DrawReticle(Grid: TStringGrid; ACol, ARow: Integer; Rect: TRect;
ReticleFontColor, ReticleBackColor,
GridFontColor, GridBackColor,
SelFontColor, SelBackColor: TColor);
begin
if (ACol > Grid.FixedCols - 1) and (ARow > Grid.FixedRows - 1) then
begin
with Grid do
begin
//Zellen im Fadenkreuz
if (ACol = Grid.Col) or (ARow = Grid.Row) then
begin
Canvas.Font.Color := ReticleFontColor;
Canvas.Brush.Color := ReticleBackColor;
//Zellentext ausgeben
GridAlignment(Grid, Rect, ACol, ARow, taCenter, False);
Canvas.FrameRect(Rect);
end
else
//Zellen auserhalb des Fadenkreuz
begin
Canvas.Font.Color := GridFontColor;
Canvas.Brush.Color := GridBackColor;
//Zellentext ausgeben
GridAlignment(Grid, Rect, ACol, ARow, taLeftJustify, False);
Canvas.FrameRect(Rect);
end;
//markierte Zelle
if (ACol = Grid.Col) and (ARow = Grid.Row) then
begin
Canvas.Font.Color := SelFontColor;
Canvas.Brush.Color := SelBackColor;
//Zellentext ausgeben
GridAlignment(Grid, Rect, ACol, ARow, taCenter, False);
Canvas.FrameRect(Rect);
end;
end;
end;
end;



//Example
//Procedure im OnDrawCell des Grid aufrufen
procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer;
Rect: TRect; State: TGridDrawState);
begin
//Fadenkreuz erzeugen
DrawReticle(StringGrid1, ACol, ARow, Rect,
clWindow, clNavy, clWindowText, clInfoBk, clWindowText, clWindow);
end;

//Für neue Zellenselektion, Grid neu Zeichnen
procedure TForm1.StringGrid1Click(Sender: TObject);
begin
StringGrid1.Invalidate;
end;


end.

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