/usr/lib/lazarus/0.9.30.4/lcl/chart.pp is in lazarus-src-0.9.30.4 0.9.30.4-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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{
/***************************************************************************
chart.pp
--------
Component Library Extended Controls
***************************************************************************/
*****************************************************************************
* *
* This file is part of the Lazarus Component Library (LCL) *
* *
* See the file COPYING.modifiedLGPL.txt, included in this distribution, *
* for details about the copyright. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* *
*****************************************************************************
This unit is deprecated, because there is something better:
package TAChartLazarusPkg.
Author: Michael Van Canneyt
}
unit Chart;
{$MODE ObjFPC}{$H+}
interface
uses
Types, SysUtils, Classes, LCLProc, LCLIntf, LCLType, Controls, ExtCtrls, Graphics,
Dialogs;
type
TPosLabel=(plLeft, plCenter, plRight);
TCustomBarChart = class;
{ TBar }
TBar = class(TCollectionItem)
private
FColor: TColor;
FSName: String;
FValue: integer;
procedure SetColor(const AValue: TColor);
procedure SetSName(const AValue: String);
procedure SetValue(const AValue: integer);
procedure UpdateBarChart;
protected
function GetDisplayName: string; override;
published
property SName: String read FSName write SetSName;
property Value: integer read FValue write SetValue;
property Color: TColor read FColor write SetColor;
end;
{ TBarChartItems }
TBarChartItems = class(TCollection)
private
FBarChart: TCustomBarChart;
protected
function GetOwner: TPersistent; override;
public
constructor Create(BarChart: TCustomBarChart);
end;
{ TCustomBarChart }
TCustomBarChart = class(TPanel)
private
FUpdateCount: Integer;
FBars: TCollection;
FDepth: byte;
FLabelPosition:TPosLabel;
FIsPainting: Boolean;
function GetBars: TCollection;
function NormalizeScaleUnits(OldScale: Integer): Integer;
procedure SetBars(const AValue: TCollection);
procedure SetDepth(const AValue: byte);
procedure SetLabelPosition(const AValue: TPosLabel);
protected
procedure Paint; override;
class function GetControlClassDefaultSize: TSize; override;
function RealGetText: TCaption; override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Clear;
function AddBar(const SName: string; Value: integer; AColor: TColor): TBar;
function GetBar(SId: integer): TBar;
function BarCount: Integer;
procedure BeginUpdate;
procedure EndUpdate;
procedure UpdateBarChart;
published
property Bars: TCollection read GetBars write SetBars;
property Depth: byte read FDepth write SetDepth;
property LabelPosition: TPosLabel read FLabelPosition write SetLabelPosition;
end;
{ TBarChart
Deprecated!
Use package TAChartLazarusPkg instead. It has a compatible and better component.}
TBarChart = class(TCustomBarChart)
published
property Align;
property Alignment;
property Anchors;
property AutoSize;
property BorderSpacing;
property BevelInner;
property BevelOuter;
property BevelWidth;
property BorderWidth;
property BorderStyle;
property Caption;
property ClientHeight;
property ClientWidth;
property Color;
property Constraints;
property DragMode;
property Enabled;
property Font;
property FullRepaint;
property ParentColor;
property ParentFont;
property ParentShowHint;
property PopupMenu;
property ShowHint;
property TabOrder;
property TabStop;
property Visible;
property OnClick;
property OnDblClick;
property OnDragDrop;
property OnDragOver;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property OnResize;
property OnStartDrag;
end deprecated; // use package TAChartLazarusPkg instead. It has a compatible and better component.
procedure Register;
implementation
procedure Register;
begin
{$WARNINGS off}
RegisterComponents('Misc',[TBarChart]);
{$WARNINGS on}
end;
constructor TCustomBarChart.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FBars:=TBarChartItems.Create(Self);
FDepth:=5;
FLabelPosition:=plLeft;
with GetControlClassDefaultSize do
SetInitialBounds(0, 0, CX, CY);
end;
destructor TCustomBarChart.Destroy;
begin
FBars.Destroy;
inherited Destroy;
end;
function TCustomBarChart.AddBar(const SName: string; Value: Integer;
AColor: TColor): TBar;
begin
BeginUpdate;
Try
result:=TBar(FBars.Add);
result.FsName:=SName;
result.FValue:=Value;
result.FColor:=AColor;
finally
EndUpdate;
end;
end;
function TCustomBarChart.GetBar(SId: integer): TBar;
begin
result:=TBar(FBars.FindItemID(SId));
end;
function TCustomBarChart.NormalizeScaleUnits(OldScale: Integer): Integer;
Var
T: Integer;
begin
Result:=OldScale;
if Result<2 then
Result:=2
else if Result<=5 then
Result:=5
else if Result<=10 then
Result:=10
else
begin
T:=StrToInt(IntToStr(Result)[1])+1;
repeat
Result:=Result div 10;
T:=T*10;
until Result<10;
Result:=T;
end;
end;
function TCustomBarChart.GetBars: TCollection;
begin
Result:=FBars;
end;
procedure TCustomBarChart.SetBars(const AValue: TCollection);
begin
FBars.Assign(AValue);
end;
procedure TCustomBarChart.SetDepth(const AValue: byte);
begin
if FDepth=AValue then exit;
FDepth:=AValue;
UpdateBarChart;
end;
procedure TCustomBarChart.SetLabelPosition(const AValue: TPosLabel);
begin
if FLabelPosition=AValue then exit;
FLabelPosition:=AValue;
UpdateBarChart;
end;
procedure TCustomBarChart.Paint;
var
i,k,j,h,w,h1,HMax,VMax: integer;
bx,by:integer;
NScaleLines : Integer;
ScaleUnits : Integer;
PixelPerUnit: Double;
BC : Double;
RBC : Integer;
BL : Integer;
m,z: integer;
ts : TBar;
s : string;
rc : TRect;
procedure ScaleLine(dk: integer; const s: string);
begin
Canvas.MoveTo(hmax+dk+FDepth,h1);
Canvas.LineTo(hmax+dk+FDepth,h1+h);
Canvas.LineTo(hmax+dk,h1+FDepth+h);
Canvas.LineTo(hmax+dk,h1+FDepth+h+2);
Canvas.TextOut(HMax+dk-j,m,s);
end;
begin
FIsPainting := true;
try
inherited Paint;
finally
FIsPainting := false;
end;
bx:=GetSystemMetrics(SM_CXEDGE);
by:=GetSystemMetrics(SM_CYEDGE);
hmax:=10;
vmax:=0;
for i:=0 to FBars.Count-1 do
begin
ts:=TBar(FBars.Items[i]);
k:=Canvas.TextWidth(ts.FsName);
if k>hmax then
Hmax:=k;
if ts.FValue>vmax then
vmax:=ts.FValue;
end;
HMax:=HMax+10;
h1:=RoundToInt(1.5*Canvas.TextHeight('W'));
h:=Height-2*h1-Fdepth;
w:=Width-hmax-2*FDepth;
Canvas.Pen.Color:=clBlack;
Canvas.Pen.Width:=1;
Canvas.Pen.Style:=psSolid;
Canvas.Brush.Color:=clYellow;
Canvas.Brush.Style:=bsSolid;
Canvas.Polygon([Point(HMax,h1+FDepth),Point(HMax,h1+FDepth+h),Point(HMax+FDepth,h1+h),Point(HMax+FDepth,h1)]);
Canvas.Brush.Color:=clWhite;
Canvas.Polygon([Point(HMax,h1+FDepth+h),Point(HMax+w,h1+FDepth+h),Point(HMax+w+FDepth,h1+h),Point(HMax+FDepth,h1+h)]);
Canvas.Brush.Color:=Color;
Canvas.Rectangle(hmax+Fdepth,h1,hmax+w+FDepth,h1+h+1);
Canvas.Pen.Width:=3;
Canvas.MoveTo(hmax,h1+FDepth);
Canvas.LineTo(hmax,h1+FDepth+h);
Canvas.LineTo(hmax+w,h1+FDepth+h);
Canvas.TextOut(bx,by,Caption);
j:=Canvas.TextWidth(IntTostr(VMax));
if VMax=0 then
begin
PixelPerUnit:=1;
NscaleLines:=1;
end
else
begin
PixelPerUnit:=double(w-j-6) / VMax;
NScaleLines:=(w-j-6) div (2*j);
end;
if NScaleLines=0 then
ScaleUnits:=Vmax +1
else
ScaleUnits:=(Vmax div NScaleLines) +1;
ScaleUnits:=NormalizeScaleUnits(ScaleUnits);
if ScaleUnits=0 then
NScaleLines:=1
else
NScaleLines:=VMax div ScaleUnits;
Canvas.Pen.Color:=clGray;
Canvas.Pen.Style:=psDot;
Canvas.Pen.Width:=1;
j:=j div 2;
m:=h1+FDepth+h+2;
if VMax=0 then
begin
k:=w div 2;
ScaleLine(k,'0');
end
else
Canvas.TextOut(HMax-j,m,'0');
for k:=1 to NScaleLines do
ScaleLine(RoundToInt(ScaleUnits*PixelPerUnit*k),IntToStr(k*ScaleUnits));
If FBars.Count=0 then
BC:=0
else
BC:=double(h) / (2*(FBars.Count+1));
RBC:=RoundToInt(BC);
z:=h1+FDepth+h;
Canvas.Pen.Style:=psSolid;
for i:=0 to FBars.Count-1 do
begin
ts:=TBar(FBars.Items[i]);
z:=h1+FDepth+h-Round(2*(I+1)*BC);
Canvas.Brush.Color:=ts.FColor;
m:=ts.FValue;
BL:=RoundToInt(m*PixelPerUnit);
Canvas.Rectangle(hmax+1,z-1,hmax+BL+1,z+RBC-1);
Canvas.Polygon([Point(hmax,z),Point(hmax+BL,z),Point(hmax+BL+FDepth,z-FDepth),Point(hmax+FDepth,z-FDepth)]);
Canvas.Polygon([Point(hmax+BL,z),Point(hmax+BL,z+RBC-1),Point(hmax+BL+FDepth,z+RBC-1-FDepth),Point(hmax+BL+FDepth,z-FDepth)]);
s:=IntToStr(m);
w:=z+(RBC-FDepth) div 2;
Canvas.MoveTo(Hmax+BL+Fdepth div 2,w);
Canvas.LineTo(Hmax+BL+Fdepth+5-bx,w);
Canvas.Brush.Color:=clYellow;
with rc do
begin
left:=hmax+BL+FDepth+5-bx;
right:=left+Canvas.TextWidth(s)+2*bx;
top:=w-Canvas.TextHeight(s) div 2-by;
bottom:=w+Canvas.TextHeight(s) div 2+by;
end;
Canvas.Rectangle(rc);
//debugln('TCustomBarChart.Paint A ',dbgs(rc),' s="',s,'"');
Canvas.TextOut(rc.Left+bx,rc.Top+by,s);
Canvas.Font.Color:=Font.Color;
case FLabelPosition of
plLeft: Canvas.TextOut(bx,z,ts.FSName);
plCenter: Canvas.TextOut(HMax+((BL-Canvas.TextWidth(ts.FSName)) div 2),z,ts.FSName);
plRight: Canvas.TextOut(HMax+BL-Canvas.TextWidth(ts.FSName)-bx,z,ts.FSName);
end;
end;
Canvas.Pen.Style:=psSolid;
end;
function TCustomBarChart.RealGetText: TCaption;
begin
if FIsPainting then
Result := ''
else
Result := inherited RealGetText;
end;
class function TCustomBarChart.GetControlClassDefaultSize: TSize;
begin
Result.CX := 150;
Result.CY := 120;
end;
procedure TCustomBarChart.Clear;
begin
FBars.Clear;
end;
procedure TCustomBarChart.BeginUpdate;
begin
Inc(FUpdateCount);
end;
procedure TCustomBarChart.EndUpdate;
begin
if FUpdateCount=0 then
raise Exception.Create('TCustomBarChart.EndUpdate');
Dec(FUpdateCount);
If FUpdateCount=0 then
Invalidate;
end;
procedure TCustomBarChart.UpdateBarChart;
begin
if FUpdateCount = 0 then
Invalidate;
end;
function TCustomBarChart.BarCount: Integer;
begin
Result:=FBars.Count;
end;
{ TBar }
procedure TBar.SetColor(const AValue: TColor);
begin
if FColor=AValue then exit;
FColor:=AValue;
UpdateBarChart;
end;
procedure TBar.SetSName(const AValue: String);
begin
if FSName=AValue then exit;
FSName:=AValue;
UpdateBarChart;
end;
procedure TBar.SetValue(const AValue: integer);
begin
if FValue=AValue then exit;
FValue:=AValue;
UpdateBarChart;
end;
procedure TBar.UpdateBarChart;
begin
(Collection as TBarChartItems).FBarChart.UpdateBarChart;
end;
function TBar.GetDisplayName: string;
begin
Result:=FSName;
end;
{ TBarChartItems }
function TBarChartItems.GetOwner: TPersistent;
begin
Result := FBarChart;
end;
constructor TBarChartItems.Create(BarChart: TCustomBarChart);
begin
inherited Create(TBar);
FBarChart:=BarChart;
end;
end.
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