Title: ColorStringGrid
Question: Now I want to show how to create the String grid which allows to work with itself like
grid1.cells[1,1].font.color:=clRed;
grid1.cells[1,2].color:=clBlue;
grid1.cells[1,2].Text:='It is very simple !';
In teh future I plane to add features which will allow to set an bitmap to cell.
Answer:
nit VesColorStringGrid;
interface
uses
Windows, Messages, SysUtils, Classes, Controls, Grids, Graphics, Contnrs;
type
TVesCellProperties = class(TPersistent)
private
FGrid: TStringGrid;
FColor: TColor;
FFont: TFont;
FText: string;
FData: TObject;
FPicture: TPicture;
procedure SetColor(const Value: TColor);
procedure SetFont(const Value: TFont);
procedure SetText(const Value: string);
procedure SetData(const Value: TObject);
procedure SetPicture(const Value: TPicture);
public
constructor Create(AGrid: TStringGrid); virtual;
property Data: TObject read FData write SetData;
destructor Destroy; override;
procedure Assign(Source: TPersistent); override;
property Text: string read FText write SetText;
property Picture: TPicture read FPicture write SetPicture;
published
property Color: TColor read FColor write SetColor;
property Font: TFont read FFont write SetFont;
end;
TVesColorStringGrid = class(TStringGrid)
private
FPropList: TObjectList;
FFixedRowParam: TVesCellProperties;
FFixedColParam: TVesCellProperties;
FTopLeftCorner: TVesCellProperties;
function GetVesProp(ACol, ARow: Integer): TVesCellProperties;
procedure SetVesProp(ACol, ARow: Integer; const Value: TVesCellProperties);
procedure SetFixedColParam(const Value: TVesCellProperties);
procedure SetFixedRowParam(const Value: TVesCellProperties);
procedure SetTopLeftCorner(const Value: TVesCellProperties);
{ Private declarations }
protected
procedure DrawCell(ACol, ARow: Longint; ARect: TRect;
AState: TGridDrawState); override;
property Objects;
property FixedColor;
{ Protected declarations }
public
constructor Create(Owner: TComponent); override;
property Cells[ACol, ARow: Integer]: TVesCellProperties read GetVesProp write SetVesProp;
{ Public declarations }
destructor Destroy; override;
published
property FixedRowParam: TVesCellProperties read FFixedRowParam write SetFixedRowParam;
property FixedColParam: TVesCellProperties read FFixedColParam write SetFixedColParam;
property TopLeftCorner: TVesCellProperties read FTopLeftCorner write SetTopLeftCorner;
{ Published declarations }
end;
procedure Register;
implementation
procedure Register;
begin
RegisterComponents('VesVCL', [TVesColorStringGrid]);
end;
{ TVesCellProperties }
procedure TVesCellProperties.Assign(Source: TPersistent);
var
vSource: TVesCellProperties;
begin
vSource := (Source as TVesCellProperties);
inherited;
FColor := vSource.FColor;
FFont.Assign(vSource.FFont);
FPicture.Assign(vSource.FPicture);
Data := vSource.Data;
end;
constructor TVesCellProperties.Create;
begin
inherited Create;
FFont := TFont.Create;
FPicture := TPicture.Create;
FGrid := AGrid;
end;
destructor TVesCellProperties.Destroy;
begin
FFont.Free;
FPicture.Free;
inherited;
end;
procedure TVesCellProperties.SetColor(const Value: TColor);
begin
FColor := Value;
FGrid.Repaint;
end;
procedure TVesCellProperties.SetData(const Value: TObject);
begin
FData := Value;
end;
procedure TVesCellProperties.SetFont(const Value: TFont);
begin
FFont.Assign(Value);
FGrid.Repaint;
end;
procedure TVesCellProperties.SetPicture(const Value: TPicture);
begin
FPicture.Assign(Value);
FGrid.Repaint;
end;
procedure TVesCellProperties.SetText(const Value: string);
begin
FText := Value;
FGrid.Repaint;
end;
{ TVesColorStringGrid }
constructor TVesColorStringGrid.Create(Owner: TComponent);
begin
inherited;
FPropList := TObjectList.Create(True);
FFixedRowParam := TVesCellProperties.Create(Self);
FFixedColParam := TVesCellProperties.Create(Self);
FTopLeftCorner := TVesCellProperties.Create(Self);
with FFixedRowParam do
begin
Color := FixedColor;
Font := Self.Font;
end;
with FFixedColParam do
begin
Color := FixedColor;
Font := Self.Font;
end;
with FTopLeftCorner do
begin
Color := FixedColor;
Font := Self.Font;
end;
end;
destructor TVesColorStringGrid.Destroy;
begin
FPropList.Free;
inherited;
end;
procedure TVesColorStringGrid.DrawCell(ACol, ARow: Integer; ARect: TRect;
AState: TGridDrawState);
var
VParam: TVesCellProperties;
begin
inherited;
with Canvas do
begin
if not (gdFixed in AState) then
VParam := Cells[ACol, ARow]
else if ACol FixedRows - 1 then
VParam := FixedColParam
else if ARow FixedCols - 1 then
VParam := FFixedRowParam
else
VParam := FTopLeftCorner;
Brush.Color := VParam.Color;
Font.Assign(Vparam.FFont);
FillRect(ARect);
TextRect(ARect, ARect.Left + 2, ARect.Top + 2, Cells[ACol,ARow].Text);
end;
end;
function TVesColorStringGrid.GetVesProp(ACol,
ARow: Integer): TVesCellProperties;
var
VProp: TVesCellProperties;
begin
if Assigned(Objects[ACol, ARow]) then
Result := TVesCellProperties(Objects[ACol, ARow])
else
begin
VProp := TVesCellProperties.Create(Self);
with VProp do
begin
FColor := Self.Color;
Font.Assign(Font);
end;
FPropList.Add(VProp);
Objects[ACol, ARow] := VProp;
Result := VProp;
end;
end;
procedure TVesColorStringGrid.SetFixedColParam(
const Value: TVesCellProperties);
begin
FFixedColParam.Assign(Value);
end;
procedure TVesColorStringGrid.SetFixedRowParam(
const Value: TVesCellProperties);
begin
FFixedRowParam.Assign(Value);
end;
procedure TVesColorStringGrid.SetTopLeftCorner(
const Value: TVesCellProperties);
begin
FTopLeftCorner.Assign(Value);
end;
procedure TVesColorStringGrid.SetVesProp(ACol, ARow: Integer; const Value: TVesCellProperties);
begin
GetVesProp(ACol, ARow);
TVesCellProperties(Objects[ACol, ARow]).Assign(Value);
end;