mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-04-27 18:53:48 +02:00
107 lines
2.3 KiB
ObjectPascal
107 lines
2.3 KiB
ObjectPascal
{
|
|
|
|
*****************************************************************************
|
|
See the file COPYING.modifiedLGPL.txt, included in this distribution,
|
|
for details about the license.
|
|
*****************************************************************************
|
|
|
|
Authors: Alexander Klenin
|
|
|
|
}
|
|
|
|
unit TAAxisSource;
|
|
|
|
{$MODE ObjFPC}{$H+}
|
|
|
|
interface
|
|
|
|
uses
|
|
Classes, TACustomSource, TAChartAxis;
|
|
|
|
type
|
|
TCustomAxisChartSource = class(TCustomChartSource)
|
|
strict private
|
|
FAxisFrom: TChartAxis;
|
|
FAxisTo: TChartAxis;
|
|
FItem: TChartDataItem;
|
|
protected
|
|
function GetCount: Integer; override;
|
|
function GetItem(AIndex: Integer): PChartDataItem; override;
|
|
procedure SetXCount(AValue: Cardinal); override;
|
|
procedure SetYCount(AValue: Cardinal); override;
|
|
public
|
|
constructor Create(AOwner: TComponent); override;
|
|
public
|
|
function IsSorted: Boolean; override;
|
|
|
|
property AxisFrom: TChartAxis read FAxisFrom write FAxisFrom;
|
|
property AxisTo: TChartAxis read FAxisTo write FAxisTo;
|
|
end;
|
|
|
|
implementation
|
|
|
|
uses
|
|
Math,
|
|
TAChartUtils;
|
|
|
|
{ TCustomAxisChartSource }
|
|
|
|
constructor TCustomAxisChartSource.Create(AOwner: TComponent);
|
|
begin
|
|
inherited Create(AOwner);
|
|
FItem.Color := clTAColor;
|
|
FItem.XList := nil;
|
|
FItem.YList := nil;
|
|
end;
|
|
|
|
function TCustomAxisChartSource.GetCount: Integer;
|
|
begin
|
|
if AxisFrom = nil then
|
|
Result := 0
|
|
else
|
|
Result := AxisFrom.ValueCount;
|
|
end;
|
|
|
|
function TCustomAxisChartSource.GetItem(AIndex: Integer): PChartDataItem;
|
|
var
|
|
v: Double;
|
|
begin
|
|
Result := @FItem;
|
|
if AxisFrom = nil then begin
|
|
FItem.Text := '';
|
|
FItem.X := NaN;
|
|
FItem.Y := NaN;
|
|
exit;
|
|
end;
|
|
with AxisFrom.Value[AIndex] do begin
|
|
FItem.Text := FText;
|
|
v := FValue;
|
|
end;
|
|
if AxisFrom.Transformations <> nil then
|
|
v := AxisFrom.Transformations.AxisToGraph(v);
|
|
if (AxisTo <> nil) and (AxisTo.Transformations <> nil) then
|
|
v := AxisTo.Transformations.GraphToAxis(v);
|
|
FItem.X := v;
|
|
FItem.Y := v;
|
|
end;
|
|
|
|
function TCustomAxisChartSource.IsSorted: Boolean;
|
|
begin
|
|
Result := true;
|
|
end;
|
|
|
|
procedure TCustomAxisChartSource.SetXCount(AValue: Cardinal);
|
|
begin
|
|
Unused(AValue);
|
|
raise EXCountError.Create('Cannot set XCount');
|
|
end;
|
|
|
|
procedure TCustomAxisChartSource.SetYCount(AValue: Cardinal);
|
|
begin
|
|
Unused(AValue);
|
|
raise EYCountError.Create('Cannot set YCount');
|
|
end;
|
|
|
|
end.
|
|
|