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{
*****************************************************************************
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
Author: Alexander Klenin
}
unit TADataPointsEditor;
{$H+}
interface
uses
ButtonPanel, Classes, ExtCtrls, Grids, Menus, SysUtils, Forms, Controls,
Graphics, Dialogs;
type
{ TDataPointsEditorForm }
TDataPointsEditorForm = class(TForm)
ButtonPanel1: TButtonPanel;
cdItemColor: TColorDialog;
miInsertRow: TMenuItem;
miDeleteRow: TMenuItem;
pmRows: TPopupMenu;
sgData: TStringGrid;
procedure FormCreate(Sender: TObject);
procedure miDeleteRowClick(Sender: TObject);
procedure miInsertRowClick(Sender: TObject);
procedure pmRowsPopup(Sender: TObject);
procedure sgDataButtonClick(ASender: TObject; ACol, ARow: Integer);
procedure sgDataDrawCell(
ASender: TObject; ACol, ARow: Integer; ARect: TRect;
AState: TGridDrawState);
procedure sgDataPrepareCanvas(sender: TObject; aCol, aRow: Integer;
aState: TGridDrawState);
strict private
FCurrentRow: Integer;
FDataPoints: TStrings;
FYCount: Integer;
public
procedure InitData(AYCount: Integer; ADataPoints: TStrings);
procedure ExtractData(out AModified: Boolean);
end;
procedure Register;
implementation
uses
LCLIntf, Math, PropEdits,
TAChartStrConsts, TAChartUtils, TASources;
{$R *.lfm}
type
TDataPointsPropertyEditor = class(TPropertyEditor)
public
procedure Edit; override;
function GetAttributes: TPropertyAttributes; override;
function GetValue: AnsiString; override;
end;
procedure Register;
begin
RegisterPropertyEditor(
TypeInfo(TStrings), TListChartSource, 'DataPoints',
TDataPointsPropertyEditor);
end;
{ TDataPointsEditorForm }
procedure TDataPointsEditorForm.ExtractData(out AModified: Boolean);
var
i: Integer;
s: String;
oldDataPoints: String;
begin
oldDataPoints := FDataPoints.Text;
FDataPoints.BeginUpdate;
try
FDataPoints.Clear;
for i := 1 to sgData.RowCount - 1 do begin
with sgData.Rows[i] do begin
Delimiter := '|';
StrictDelimiter := true;
s := DelimitedText;
end;
if Length(s) >= sgData.ColCount then
FDataPoints.Add(Copy(s, 2, MaxInt));
end;
finally
FDataPoints.EndUpdate;
AModified := FDataPoints.Text <> oldDataPoints;
end;
end;
procedure TDataPointsEditorForm.InitData(
AYCount: Integer; ADataPoints: TStrings);
var
i: Integer;
begin
FYCount := AYCount;
FDataPoints := ADataPoints;
sgData.RowCount := Max(ADataPoints.Count + 1, 2);
for i := sgData.Columns.Count - 1 downto 0 do
with sgData.Columns[i].Title do
if (Caption[1] = 'Y') and (Caption <> 'Y') then
sgData.Columns.Delete(i);
for i := 2 to AYCount do begin
with sgData.Columns.Add do begin
Assign(sgData.Columns[1]);
Title.Caption := 'Y' + IntToStr(i);
Index := i;
end;
end;
for i := 0 to ADataPoints.Count - 1 do
Split('|' + ADataPoints[i], sgData.Rows[i + 1])
end;
procedure TDataPointsEditorForm.miDeleteRowClick(Sender: TObject);
begin
if sgData.RowCount <= 2 then begin
sgData.Rows[1].Clear;
exit;
end;
if InRange(FCurrentRow, 1, sgData.RowCount - 1) then
sgData.DeleteRow(FCurrentRow);
end;
procedure TDataPointsEditorForm.FormCreate(Sender: TObject);
begin
Caption := desDatapointEditor;
sgData.Columns[2].Title.Caption := desColor;
sgData.Columns[3].Title.Caption := desText;
miInsertRow.Caption := desInsertRow;
miDeleteRow.Caption := desDeleteRow;
end;
procedure TDataPointsEditorForm.miInsertRowClick(Sender: TObject);
begin
sgData.InsertColRow(false, FCurrentRow);
end;
procedure TDataPointsEditorForm.pmRowsPopup(Sender: TObject);
begin
FCurrentRow := sgData.MouseToCell(sgData.ScreenToClient(Mouse.CursorPos)).Y;
if not InRange(FCurrentRow, 1, sgData.RowCount - 1) then
Abort;
sgData.Row := FCurrentRow;
end;
procedure TDataPointsEditorForm.sgDataButtonClick(
ASender: TObject; ACol, ARow: Integer);
begin
Unused(ASender);
if (ARow < 1) or (ACol <> FYCount + 2) then exit;
cdItemColor.Color := StrToIntDef(sgData.Cells[ACol, ARow], clRed);
if not cdItemColor.Execute then exit;
sgData.Cells[ACol, ARow] := IntToColorHex(cdItemColor.Color);
end;
procedure TDataPointsEditorForm.sgDataDrawCell(
ASender: TObject; ACol, ARow: Integer; ARect: TRect; AState: TGridDrawState);
var
c: Integer;
begin
Unused(ASender, AState);
if (ARow < 1) or (ACol <> FYCount + 2) then exit;
if not TryStrToInt(sgData.Cells[ACol, ARow], c) then exit;
sgData.Canvas.Pen.Color := clBlack;
sgData.Canvas.Brush.Color := c;
InflateRect(ARect, -2, -2);
ARect.Left := ARect.Right - 12;
sgData.Canvas.Rectangle(ARect);
end;
procedure TDataPointsEditorForm.sgDataPrepareCanvas(sender: TObject; aCol,
aRow: Integer; aState: TGridDrawState);
var
ts: TTextStyle;
begin
Unused(aRow, aState);
if ACol = 0 then begin
ts := TStringGrid(Sender).Canvas.TextStyle;
ts.Alignment := taRightJustify;
TStringGrid(Sender).Canvas.TextStyle := ts;
end;
end;
{ TDataPointsPropertyEditor }
procedure TDataPointsPropertyEditor.Edit;
var
dataModified: Boolean;
begin
with TDataPointsEditorForm.Create(nil) do
try
InitData(
(GetComponent(0) as TListChartSource).YCount,
GetObjectValue as TStrings);
if ShowModal = mrOK then begin
ExtractData(dataModified);
if dataModified then Modified;
end;
finally
Free;
end;
end;
function TDataPointsPropertyEditor.GetAttributes: TPropertyAttributes;
begin
Result := [paDialog, paMultiSelect, paReadOnly, paRevertable];
end;
function TDataPointsPropertyEditor.GetValue: AnsiString;
begin
Result := (GetObjectValue as TStrings).Text;
end;
end.
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