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{
*****************************************************************************
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
Authors: Alexander Klenin
}
unit TALegend;
{$H+}
interface
uses
Classes, Contnrs, FPCanvas, Graphics, SysUtils,
TAChartUtils, TADrawUtils, TATypes;
const
DEF_LEGEND_SPACING = 4;
DEF_LEGEND_MARGIN = 4;
DEF_LEGEND_SYMBOL_WIDTH = 20;
LEGEND_ITEM_ORDER_AS_ADDED = -1;
LEGEND_ITEM_NO_GROUP = -1;
type
{ TLegendItem }
TLegendItem = class
strict private
FColor: TColor;
FFont: TFont;
FGroupIndex: Integer;
FOrder: Integer;
FOwner: TIndexedComponent;
FText: String;
FTextFormat: TChartTextFormat;
public
constructor Create(const AText: String; AColor: TColor = clTAColor);
procedure Draw(ADrawer: IChartDrawer; const ARect: TRect); virtual;
function HasSymbol: Boolean; virtual;
procedure UpdateFont(ADrawer: IChartDrawer; var APrevFont: TFont);
public
property Color: TColor read FColor write FColor;
property Font: TFont read FFont write FFont;
property GroupIndex: Integer read FGroupIndex write FGroupIndex;
property Order: Integer read FOrder write FOrder;
property Owner: TIndexedComponent read FOwner write FOwner;
property Text: String read FText write FText;
property TextFormat: TChartTextFormat read FTextFormat write FTextFormat;
end;
{ TLegendItemGroupTitle }
TLegendItemGroupTitle = class(TLegendItem)
public
procedure Draw(ADrawer: IChartDrawer; const ARect: TRect); override;
function HasSymbol: Boolean; override;
end;
TLegendItemDrawEvent = procedure (
ACanvas: TCanvas; const ARect: TRect; AIndex: Integer; AItem: TLegendItem
) of object;
{ TLegendItemUserDrawn }
TLegendItemUserDrawn = class(TLegendItem)
strict private
FIndex: Integer;
FOnDraw: TLegendItemDrawEvent;
public
constructor Create(
AIndex: Integer; AOnDraw: TLegendItemDrawEvent; const AText: String);
procedure Draw(ADrawer: IChartDrawer; const ARect: TRect); override;
property OnDraw: TLegendItemDrawEvent read FOnDraw;
end;
{ TLegendItemLine }
TLegendItemLine = class(TLegendItem)
strict protected
FPen: TFPCustomPen;
public
constructor Create(APen: TFPCustomPen; const AText: String);
procedure Draw(ADrawer: IChartDrawer; const ARect: TRect); override;
end;
{ TLegendItemLinePointer }
TLegendItemLinePointer = class(TLegendItemLine)
strict protected
FPointer: TSeriesPointer;
FBrush: TBrush;
FPresetBrush: Boolean;
public
constructor Create(
APen: TPen; APointer: TSeriesPointer; const AText: String);
constructor CreateWithBrush(
APen: TPen; ABrush: TBrush; APointer: TSeriesPointer; const AText: String);
procedure Draw(ADrawer: IChartDrawer; const ARect: TRect); override;
end;
{ TLegendItemBrushRect }
TLegendItemBrushRect = class(TLegendItem)
strict private
FBrush: TFPCustomBrush;
public
constructor Create(ABrush: TFPCustomBrush; const AText: String);
procedure Draw(ADrawer: IChartDrawer; const ARect: TRect); override;
end;
TLegendItemsEnumerator = class(TListEnumerator)
public
function GetCurrent: TLegendItem;
property Current: TLegendItem read GetCurrent;
end;
{ TChartLegendItems }
TChartLegendItems = class(TObjectList)
strict private
function GetItem(AIndex: Integer): TLegendItem;
procedure SetItem(AIndex: Integer; AValue: TLegendItem);
public
function GetEnumerator: TLegendItemsEnumerator;
property Items[AIndex: Integer]: TLegendItem
read GetItem write SetItem; default;
end;
TChartLegendBrush = class(TBrush)
published
property Color default clWhite;
end;
TLegendAlignment = (
laTopLeft, laCenterLeft, laBottomLeft,
laTopCenter, laBottomCenter, // laCenterCenter makes no sense.
laTopRight, laCenterRight, laBottomRight);
TChartLegendDrawingData = record
FBounds: TRect;
FColCount: Integer;
FDrawer: IChartDrawer;
FItems: TChartLegendItems;
FItemSize: TPoint;
FRowCount: Integer;
end;
TLegendColumnCount = 1..MaxInt;
TLegendItemFillOrder = (lfoColRow, lfoRowCol);
TChartLegendGridPen = class(TChartPen)
published
property Visible default false;
end;
{ TChartLegend }
TChartLegend = class(TChartElement)
strict private
FAlignment: TLegendAlignment;
FBackgroundBrush: TChartLegendBrush;
FColumnCount: TLegendColumnCount;
FFixedItemHeight: Cardinal;
FFont: TFont;
FFrame: TChartPen;
FGridHorizontal: TChartLegendGridPen;
FGridVertical: TChartLegendGridPen;
FGroupFont: TFont;
FGroupTitles: TStrings;
FInverted: Boolean;
FItemFillOrder: TLegendItemFillOrder;
FMarginX: TChartDistance;
FMarginY: TChartDistance;
FSpacing: TChartDistance;
FSymbolFrame: TChartPen;
FSymbolWidth: TChartDistance;
FTextFormat: TChartTextFormat;
FTransparency: TChartTransparency;
FUseSidebar: Boolean;
// Not includes the margins around item.
function MeasureItem(
ADrawer: IChartDrawer; AItems: TChartLegendItems): TPoint;
procedure SetAlignment(AValue: TLegendAlignment);
procedure SetBackgroundBrush(AValue: TChartLegendBrush);
procedure SetColumnCount(AValue: TLegendColumnCount);
procedure SetFixedItemHeight(AValue: Cardinal);
procedure SetFont(AValue: TFont);
procedure SetFrame(AValue: TChartPen);
procedure SetGridHorizontal(AValue: TChartLegendGridPen);
procedure SetGridVertical(AValue: TChartLegendGridPen);
procedure SetGroupFont(AValue: TFont);
procedure SetGroupTitles(AValue: TStrings);
procedure SetInverted(AValue: Boolean);
procedure SetItemFillOrder(AValue: TLegendItemFillOrder);
procedure SetMargin(AValue: TChartDistance);
procedure SetMarginX(AValue: TChartDistance);
procedure SetMarginY(AValue: TChartDistance);
procedure SetSpacing(AValue: TChartDistance);
procedure SetSymbolFrame(AValue: TChartPen);
procedure SetSymbolWidth(AValue: TChartDistance);
procedure SetTextFormat(AValue: TChartTextFormat);
procedure SetTransparency(AValue: TChartTransparency);
procedure SetUseSidebar(AValue: Boolean);
public
constructor Create(AOwner: TCustomChart);
destructor Destroy; override;
public
procedure AddGroups(AItems: TChartLegendItems);
procedure Assign(Source: TPersistent); override;
procedure Draw(var AData: TChartLegendDrawingData);
procedure Prepare(var AData: TChartLegendDrawingData; var AClipRect: TRect);
procedure SortItemsByOrder(AItems: TChartLegendItems);
procedure UpdateBidiMode;
published
property Alignment: TLegendAlignment
read FAlignment write SetAlignment default laTopRight;
property BackgroundBrush: TChartLegendBrush
read FBackgroundBrush write SetBackgroundBrush;
property ColumnCount: TLegendColumnCount
read FColumnCount write SetColumnCount default 1;
property FixedItemHeight: Cardinal
read FFixedItemHeight write SetFixedItemHeight default 0;
property Font: TFont read FFont write SetFont;
property Frame: TChartPen read FFrame write SetFrame;
property GridHorizontal: TChartLegendGridPen
read FGridHorizontal write SetGridHorizontal;
property GridVertical: TChartLegendGridPen
read FGridVertical write SetGridVertical;
property GroupFont: TFont read FGroupFont write SetGroupFont;
property GroupTitles: TStrings read FGroupTitles write SetGroupTitles;
property Inverted: Boolean read FInverted write SetInverted default false;
property ItemFillOrder: TLegendItemFillOrder
read FItemFillOrder write SetItemFillOrder default lfoColRow;
property MarginX: TChartDistance
read FMarginX write SetMarginX default DEF_LEGEND_MARGIN;
property MarginY: TChartDistance
read FMarginY write SetMarginY default DEF_LEGEND_MARGIN;
property Spacing: TChartDistance
read FSpacing write SetSpacing default DEF_LEGEND_SPACING;
property SymbolFrame: TChartPen read FSymbolFrame write SetSymbolFrame;
property SymbolWidth: TChartDistance
read FSymbolWidth write SetSymbolWidth default DEF_LEGEND_SYMBOL_WIDTH;
property TextFormat: TChartTextFormat
read FTextFormat write SetTextFormat default tfNormal;
property Transparency: TChartTransparency
read FTransparency write SetTransparency default 0;
property UseSidebar: Boolean read FUseSidebar write SetUseSidebar default true;
property Visible default false;
end;
TLegendMultiplicity = (lmSingle, lmPoint, lmStyle);
TLegendItemCreateEvent = procedure (
AItem: TLegendItem; AIndex: Integer) of object;
{ TChartSeriesLegend }
TChartSeriesLegend = class(TChartElement)
strict private
FFormat: String;
FGroupIndex: Integer;
FMultiplicity: TLegendMultiplicity;
FOnCreate: TLegendItemCreateEvent;
FOnDraw: TLegendItemDrawEvent;
FOrder: Integer;
FTextFormat: TChartTextFormat;
FUserItemsCount: Integer;
procedure SetFormat(AValue: String);
procedure SetGroupIndex(AValue: Integer);
procedure SetMultiplicity(AValue: TLegendMultiplicity);
procedure SetOnCreate(AValue: TLegendItemCreateEvent);
procedure SetOnDraw(AValue: TLegendItemDrawEvent);
procedure SetOrder(AValue: Integer);
procedure SetTextFormat(AValue: TChartTextFormat);
procedure SetUserItemsCount(AValue: Integer);
public
constructor Create(AOwner: TCustomChart);
public
procedure Assign(Source: TPersistent); override;
procedure InitItem(
AItem: TLegendItem; AIndex: Integer; ALegend: TChartLegend);
published
property Format: String read FFormat write SetFormat;
property GroupIndex: Integer
read FGroupIndex write SetGroupIndex default LEGEND_ITEM_NO_GROUP;
property Multiplicity: TLegendMultiplicity
read FMultiplicity write SetMultiplicity default lmSingle;
property Order: Integer
read FOrder write SetOrder default LEGEND_ITEM_ORDER_AS_ADDED;
property TextFormat: TChartTextFormat
read FTextFormat write SetTextFormat default tfNormal;
property UserItemsCount: Integer
read FUserItemsCount write SetUserItemsCount default 1;
property Visible default true;
published
property OnCreate: TLegendItemCreateEvent read FOnCreate write SetOnCreate;
property OnDraw: TLegendItemDrawEvent read FOnDraw write SetOnDraw;
end;
implementation
uses
Math, PropEdits, Types, LResources,
TADrawerCanvas, TAGeometry;
const
SYMBOL_TEXT_SPACING = 4;
function LegendItemCompare(AItem1, AItem2: Pointer): Integer;
var
li1: TLegendItem absolute AItem1;
li2: TLegendItem absolute AItem2;
begin
Result := Sign(li1.GroupIndex - li2.GroupIndex);
if Result = 0 then
Result := Sign(li1.Order - li2.Order);
end;
function LegendItemCompare_Inverted(AItem1, AItem2: Pointer): Integer;
var
li1: TLegendItem absolute AItem1;
li2: TLegendItem absolute AItem2;
begin
Result := Sign(li1.GroupIndex - li2.GroupIndex);
if Result = 0 then
Result := Sign(li2.Order - li1.Order);
end;
{ TLegendItemsEnumerator }
function TLegendItemsEnumerator.GetCurrent: TLegendItem;
begin
Result := TLegendItem(inherited GetCurrent);
end;
{ TChartLegendItems }
function TChartLegendItems.GetEnumerator: TLegendItemsEnumerator;
begin
Result := TLegendItemsEnumerator.Create(Self);
end;
function TChartLegendItems.GetItem(AIndex: Integer): TLegendItem;
begin
Result := TLegendItem(inherited GetItem(AIndex));
end;
procedure TChartLegendItems.SetItem(AIndex: Integer; AValue: TLegendItem);
begin
inherited SetItem(AIndex, AValue);
end;
{ TLegendItem }
constructor TLegendItem.Create(const AText: String; AColor: TColor);
begin
FColor := AColor;
FGroupIndex := LEGEND_ITEM_NO_GROUP;
FOrder := LEGEND_ITEM_ORDER_AS_ADDED;
FText := AText;
end;
procedure TLegendItem.Draw(ADrawer: IChartDrawer; const ARect: TRect);
var
symTextSpc: Integer;
begin
symTextSpc := ADrawer.Scale(SYMBOL_TEXT_SPACING);
if ADrawer.GetRightToLeft then
ADrawer.TextOut.
TextFormat(FTextFormat).
Pos(ARect.Left - symTextSpc - ADrawer.TextExtent(FText, FTextFormat).X, ARect.Top).
Text(FText).Done
else
ADrawer.TextOut.
TextFormat(FTextFormat).
Pos(ARect.Right + symTextSpc, ARect.Top).
Text(FText).Done;
end;
function TLegendItem.HasSymbol: Boolean;
begin
Result := true;
end;
procedure TLegendItem.UpdateFont(ADrawer: IChartDrawer; var APrevFont: TFont);
begin
if APrevFont = Font then exit;
ADrawer.Font := Font;
APrevFont := Font;
end;
{ TLegendItemGroupTitle }
procedure TLegendItemGroupTitle.Draw(ADrawer: IChartDrawer; const ARect: TRect);
begin
if ADrawer.GetRightToLeft then
ADrawer.TextOut.
TextFormat(TextFormat).
Pos(ARect.Right - ADrawer.TextExtent(Text, TextFormat).X, ARect.Top).
Text(Text).Done
else
ADrawer.TextOut.
TextFormat(TextFormat).
Pos(ARect.Left, ARect.Top).
Text(Text).Done;
end;
function TLegendItemGroupTitle.HasSymbol: Boolean;
begin
Result := false;
end;
{ TLegendItemUserDrawn }
constructor TLegendItemUserDrawn.Create(
AIndex: Integer; AOnDraw: TLegendItemDrawEvent; const AText: String);
begin
inherited Create(AText);
FIndex := AIndex;
FOnDraw := AOnDraw;
end;
procedure TLegendItemUserDrawn.Draw(ADrawer: IChartDrawer; const ARect: TRect);
var
ic: IChartTCanvasDrawer;
begin
if Supports(ADrawer, IChartTCanvasDrawer, ic) and Assigned(FOnDraw) then
FOnDraw(ic.Canvas, ARect, FIndex, Self);
inherited Draw(ADrawer, ARect);
end;
{ TLegendItemLine }
constructor TLegendItemLine.Create(APen: TFPCustomPen; const AText: String);
begin
inherited Create(AText);
FPen := APen;
end;
procedure TLegendItemLine.Draw(ADrawer: IChartDrawer; const ARect: TRect);
var
y: Integer;
begin
inherited Draw(ADrawer, ARect);
if FPen = nil then exit;
ADrawer.Pen := FPen;
y := (ARect.Top + ARect.Bottom) div 2;
ADrawer.Line(ARect.Left, y, ARect.Right, y);
end;
{ TLegendItemLinePointer }
constructor TLegendItemLinePointer.Create(
APen: TPen; APointer: TSeriesPointer; const AText: String);
begin
inherited Create(APen, AText);
FPointer := APointer;
end;
constructor TLegendItemLinePointer.CreateWithBrush(
APen: TPen; ABrush: TBrush; APointer: TSeriesPointer; const AText: String);
begin
Create(APen, APointer, AText);
FBrush := ABrush;
FPresetBrush := true;
end;
procedure TLegendItemLinePointer.Draw(
ADrawer: IChartDrawer; const ARect: TRect);
var
c, sz: TPoint;
begin
inherited Draw(ADrawer, ARect);
if FPointer = nil then exit;
c := CenterPoint(ARect);
// Max width slightly narrower then ARect to leave place for the line.
sz.X := Min(ADrawer.Scale(FPointer.HorizSize), (ARect.Right - ARect.Left) div 3);
sz.Y := Min(ADrawer.Scale(FPointer.VertSize), (ARect.Bottom - ARect.Top) div 2);
if FPresetBrush then
ADrawer.SetBrush(FBrush);
FPointer.DrawSize(ADrawer, c, sz, Color, 0.0, FPresetBrush);
end;
{ TLegendItemBrushRect }
constructor TLegendItemBrushRect.Create(
ABrush: TFPCustomBrush; const AText: String);
begin
inherited Create(AText);
FBrush := ABrush;
end;
procedure TLegendItemBrushRect.Draw(ADrawer: IChartDrawer; const ARect: TRect);
begin
inherited Draw(ADrawer, ARect);
if FBrush = nil then
ADrawer.SetBrushParams(bsSolid, ColorDef(Color, clRed))
else begin
ADrawer.Brush := FBrush;
if Color <> clTAColor then
ADrawer.SetBrushParams(FBrush.Style, Color);
end;
ADrawer.Rectangle(ARect);
end;
{ TChartLegend }
procedure TChartLegend.AddGroups(AItems: TChartLegendItems);
var
i, gi: Integer;
g: TLegendItemGroupTitle;
begin
for i := AItems.Count - 1 downto 0 do begin
gi := AItems[i].GroupIndex;
if
InRange(gi, 0, GroupTitles.Count - 1) and
((i = 0) or (AItems[i - 1].GroupIndex <> gi))
then begin
g := TLegendItemGroupTitle.Create(GroupTitles[gi]);
g.GroupIndex := gi;
g.Font := GroupFont;
g.TextFormat := FTextFormat;
AItems.Insert(i, g);
end;
end;
end;
procedure TChartLegend.Assign(Source: TPersistent);
begin
if Source is TChartLegend then
with TChartLegend(Source) do begin
Self.FAlignment := Alignment;
Self.FBackgroundBrush.Assign(BackgroundBrush);
Self.FColumnCount := ColumnCount;
Self.FFixedItemHeight := FixedItemHeight;
Self.FFont.Assign(Font);
Self.FFrame.Assign(Frame);
Self.FGridHorizontal.Assign(GridHorizontal);
Self.FGridVertical.Assign(GridVertical);
Self.FGroupFont.Assign(GroupFont);
Self.FGroupTitles.Assign(GroupTitles);
Self.FMarginX := MarginX;
Self.FMarginY := MarginY;
Self.FSpacing := Spacing;
Self.FSymbolFrame.Assign(SymbolFrame);
Self.FSymbolWidth := SymbolWidth;
Self.FTextFormat := TextFormat;
Self.FUseSidebar := UseSidebar;
end;
inherited Assign(Source);
end;
constructor TChartLegend.Create(AOwner: TCustomChart);
begin
inherited Create(AOwner);
FAlignment := laTopRight;
FColumnCount := 1;
FGridHorizontal := TChartLegendGridPen.Create;
FGridHorizontal.OnChange := @StyleChanged;
FGridVertical := TChartLegendGridPen.Create;
FGridVertical.OnChange := @StyleChanged;
FGroupTitles := TStringList.Create;
FMarginX := DEF_LEGEND_MARGIN;
FMarginY := DEF_LEGEND_MARGIN;
FSpacing := DEF_LEGEND_SPACING;
FSymbolWidth := DEF_LEGEND_SYMBOL_WIDTH;
FUseSidebar := true;
Visible := false;
InitHelper(FBackgroundBrush, TChartLegendBrush);
InitHelper(FFont, TFont);
InitHelper(FFrame, TChartPen);
InitHelper(FGroupFont, TFont);
InitHelper(FSymbolFrame, TChartPen);
end;
destructor TChartLegend.Destroy;
begin
FreeAndNil(FBackgroundBrush);
FreeAndNil(FFont);
FreeAndNil(FFrame);
FreeAndNil(FGridHorizontal);
FreeAndNil(FGridVertical);
FreeAndNil(FGroupFont);
FreeAndNil(FGroupTitles);
FreeAndNil(FSymbolFrame);
inherited;
end;
procedure TChartLegend.Draw(var AData: TChartLegendDrawingData);
var
drawer: IChartDrawer;
procedure DrawItems;
var
i, x, y: Integer;
prevFont: TFont = nil;
r: TRect;
isRTL: Boolean;
space, symwid: Integer;
begin
isRTL := drawer.GetRightToLeft;
with AData do begin
space := FDrawer.Scale(Spacing);
symwid := FDrawer.Scale(SymbolWidth);
for i := 0 to FItems.Count - 1 do begin
FItems[i].TextFormat := FTextFormat;
FItems[i].UpdateFont(drawer, prevFont);
drawer.Brush := BackgroundBrush;
if SymbolFrame.Visible then
drawer.Pen := SymbolFrame
else
drawer.SetPenParams(psClear, clTAColor);
x := 0;
y := 0;
case ItemFillOrder of
lfoColRow: DivMod(i, FRowCount, x, y);
lfoRowCol: DivMod(i, FColCount, y, x);
end;
if isRTL then
r := Bounds(
FBounds.Right - space - x * (FItemSize.X + space) - symwid,
FBounds.Top + space + y * (FItemSize.Y + space),
symwid,
FItemSize.Y)
else
r := Bounds(
FBounds.Left + space + x * (FItemSize.X + space),
FBounds.Top + space + y * (FItemSize.Y + space),
symwid,
FItemSize.Y);
FItems[i].Draw(drawer, r);
OffsetRect(r, 0, FItemSize.Y + space);
end;
if GridHorizontal.EffVisible then begin
drawer.Pen := GridHorizontal;
drawer.SetBrushParams(bsClear, clTAColor);
for i := 1 to FRowCount - 1 do begin
y := FBounds.Top + space div 2 + i * (FItemSize.Y + space);
drawer.Line(FBounds.Left, y, FBounds.Right, y);
end;
end;
if GridVertical.EffVisible then begin
drawer.Pen := GridVertical;
drawer.SetBrushParams(bsClear, clTAColor);
for i := 1 to FColCount - 1 do begin
x := FBounds.Left + space div 2 + i * (FItemSize.X + space);
drawer.Line(x, FBounds.Top, x, FBounds.Bottom);
end;
end;
end;
end;
var
r: TRect;
begin
drawer := AData.FDrawer;
drawer.SetTransparency(Transparency);
try
drawer.Brush := BackgroundBrush;
if Frame.Visible then
drawer.Pen := Frame
else
drawer.SetPenParams(psClear, clTAColor);
r := AData.FBounds;
drawer.Rectangle(r);
if AData.FItems.Count = 0 then exit;
r.Right -= 1;
drawer.ClippingStart(r);
try
DrawItems;
finally
drawer.ClippingStop;
end;
finally
drawer.SetTransparency(0);
end;
end;
function TChartLegend.MeasureItem(
ADrawer: IChartDrawer; AItems: TChartLegendItems): TPoint;
var
p: TPoint;
prevFont: TFont = nil;
li: TLegendItem;
begin
Result := Point(0, 0);
for li in AItems do begin
li.UpdateFont(ADrawer, prevFont);
if li.Text = '' then
p := Point(0, ADrawer.TextExtent('I', FTextFormat).Y)
else
p := ADrawer.TextExtent(li.Text, FTextFormat);
if li.HasSymbol then
p.X += ADrawer.Scale(SYMBOL_TEXT_SPACING + SymbolWidth);
Result := MaxPoint(p, Result);
end;
if FixedItemHeight > 0 then
Result.Y := ADrawer.Scale(FixedItemHeight);
end;
procedure TChartLegend.Prepare(
var AData: TChartLegendDrawingData; var AClipRect: TRect);
var
x, y: Integer;
sidebar, legendSize: TPoint;
margX, margY, space: Integer;
begin
with AData do begin
margX := FDrawer.Scale(MarginX);
margY := FDrawer.Scale(MarginY);
space := FDrawer.Scale(Spacing);
FColCount := Max(Min(ColumnCount, FItems.Count), 1);
FRowCount := (FItems.Count - 1) div FColCount + 1;
FItemSize := MeasureItem(FDrawer, FItems);
legendSize.X := (FItemSize.X + space) * FColCount + space;
legendSize.Y := (FItemSize.Y + space) * FRowCount + space;
end;
sidebar.X := 2 * margX;
with AClipRect do
legendSize.X := EnsureRange(legendSize.X, 0, Right - Left - sidebar.X);
sidebar.X += legendSize.X;
sidebar.Y := 2 * margX;
with AClipRect do
legendSize.Y := EnsureRange(legendSize.Y, 0, Bottom - Top - sidebar.Y);
sidebar.Y += legendSize.Y;
// Determine position according to the alignment.
case Alignment of
laTopLeft, laCenterLeft, laBottomLeft:
x := AClipRect.Left + margX;
laTopRight, laCenterRight, laBottomRight:
x := AClipRect.Right - legendSize.X - margX;
laTopCenter, laBottomCenter:
x := (AClipRect.Right + AClipRect.Left - legendSize.X) div 2;
end;
case Alignment of
laTopLeft, laTopCenter, laTopRight:
y := AClipRect.Top + margY;
laBottomLeft, laBottomCenter, laBottomRight:
y := AClipRect.Bottom - margY - legendSize.Y;
laCenterLeft, laCenterRight:
y := (AClipRect.Top + AClipRect.Bottom - legendSize.Y) div 2;
end;
if UseSidebar then
case Alignment of
laTopLeft, laCenterLeft, laBottomLeft:
AClipRect.Left += sidebar.X;
laTopRight, laCenterRight, laBottomRight:
AClipRect.Right -= sidebar.X;
laTopCenter:
AClipRect.Top += legendSize.Y + 2 * margY;
laBottomCenter:
AClipRect.Bottom -= legendSize.Y + 2 * margY;
end;
AData.FBounds := Bounds(x, y, legendSize.X, legendSize.Y);
end;
procedure TChartLegend.SetAlignment(AValue: TLegendAlignment);
begin
if FAlignment = AValue then exit;
FAlignment := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetBackgroundBrush(AValue: TChartLegendBrush);
begin
FBackgroundBrush.Assign(AValue);
StyleChanged(Self);
end;
procedure TChartLegend.SetColumnCount(AValue: TLegendColumnCount);
begin
if FColumnCount = AValue then exit;
FColumnCount := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetFixedItemHeight(AValue: Cardinal);
begin
if FFixedItemHeight = AValue then exit;
FFixedItemHeight := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetFont(AValue: TFont);
begin
FFont.Assign(AValue);
StyleChanged(Self);
end;
procedure TChartLegend.SetFrame(AValue: TChartPen);
begin
FFrame.Assign(AValue);
StyleChanged(Self);
end;
procedure TChartLegend.SetGridHorizontal(AValue: TChartLegendGridPen);
begin
if FGridHorizontal = AValue then exit;
FGridHorizontal.Assign(AValue);
StyleChanged(Self);
end;
procedure TChartLegend.SetGridVertical(AValue: TChartLegendGridPen);
begin
if FGridVertical = AValue then exit;
FGridVertical.Assign(AValue);
StyleChanged(Self);
end;
procedure TChartLegend.SetGroupFont(AValue: TFont);
begin
FGroupFont.Assign(AValue);
StyleChanged(Self);
end;
procedure TChartLegend.SetGroupTitles(AValue: TStrings);
begin
FGroupTitles.Assign(AValue);
StyleChanged(Self);
end;
procedure TChartLegend.SetInverted(AValue: Boolean);
begin
if FInverted = AValue then exit;
FInverted := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetItemFillOrder(AValue: TLegendItemFillOrder);
begin
if FItemFillOrder = AValue then exit;
FItemFillOrder := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetMargin(AValue: TChartDistance);
begin
SetMarginX(AValue);
SetMarginY(AValue);
end;
procedure TChartLegend.SetMarginX(AValue: TChartDistance);
begin
if FMarginX = AValue then exit;
FMarginX := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetMarginY(AValue: TChartDistance);
begin
if FMarginY = AValue then exit;
FMarginY := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetSpacing(AValue: TChartDistance);
begin
if FSpacing = AValue then exit;
FSpacing := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetSymbolFrame(AValue: TChartPen);
begin
if FSymbolFrame = AValue then exit;
FSymbolFrame := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetSymbolWidth(AValue: TChartDistance);
begin
if FSymbolWidth = AValue then exit;
FSymbolWidth := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetTextFormat(AValue: TChartTextFormat);
begin
if FTextFormat = AValue then exit;
FTextFormat := AValue;
StyleChanged(self);
end;
procedure TChartLegend.SetTransparency(AValue: TChartTransparency);
begin
if FTransparency = AValue then exit;
FTransparency := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SetUseSidebar(AValue: Boolean);
begin
if FUseSidebar = AValue then exit;
FUseSidebar := AValue;
StyleChanged(Self);
end;
procedure TChartLegend.SortItemsByOrder(AItems: TChartLegendItems);
var
i: Integer;
j: Integer = MaxInt;
begin
for i := AItems.Count - 1 downto 0 do
if AItems[i].Order = LEGEND_ITEM_ORDER_AS_ADDED then begin
AItems[i].Order := j;
j -= 1;
end;
if FInverted then
AItems.Sort(@LegendItemCompare_Inverted)
else
AItems.Sort(@LegendItemCompare);
end;
procedure TChartLegend.UpdateBidiMode;
begin
case Alignment of
laTopLeft : Alignment := laTopRight;
laCenterLeft : Alignment := laCenterRight;
laBottomLeft : Alignment := laBottomRight;
laTopRight : Alignment := laTopLeft;
laCenterRight : Alignment := laCenterLeft;
laBottomRight : Alignment := laBottomLeft;
end;
end;
{ TChartSeriesLegend }
procedure TChartSeriesLegend.Assign(Source: TPersistent);
begin
if Source is TChartSeriesLegend then
with TChartSeriesLegend(Source) do begin
Self.FMultiplicity := FMultiplicity;
Self.FOnDraw := FOnDraw;
Self.FTextFormat := FTextFormat;
Self.FUserItemsCount := FUserItemsCount;
end;
inherited Assign(Source);
end;
constructor TChartSeriesLegend.Create(AOwner: TCustomChart);
begin
inherited Create(AOwner);
FGroupIndex := LEGEND_ITEM_NO_GROUP;
FOrder := LEGEND_ITEM_ORDER_AS_ADDED;
FVisible := true;
FUserItemsCount := 1;
end;
procedure TChartSeriesLegend.InitItem(
AItem: TLegendItem; AIndex: Integer; ALegend: TChartLegend);
begin
if Assigned(OnCreate) then
OnCreate(AItem, AIndex);
if AItem.Font = nil then
AItem.Font := ALegend.Font;
if AItem.GroupIndex = LEGEND_ITEM_NO_GROUP then
AItem.GroupIndex := GroupIndex;
if AItem.Order = LEGEND_ITEM_ORDER_AS_ADDED then
AItem.Order := Order;
AItem.TextFormat := ALegend.TextFormat;
end;
procedure TChartSeriesLegend.SetFormat(AValue: String);
begin
if FFormat = AValue then exit;
FFormat := AValue;
StyleChanged(Self);
end;
procedure TChartSeriesLegend.SetGroupIndex(AValue: Integer);
begin
if FGroupIndex = AValue then exit;
FGroupIndex := AValue;
StyleChanged(Self);
end;
procedure TChartSeriesLegend.SetMultiplicity(AValue: TLegendMultiplicity);
begin
if FMultiplicity = AValue then exit;
FMultiplicity := AValue;
StyleChanged(Self);
end;
procedure TChartSeriesLegend.SetOnDraw(AValue: TLegendItemDrawEvent);
begin
if TMethod(FOnDraw) = TMethod(AValue) then exit;
FOnDraw := AValue;
StyleChanged(Self);
end;
procedure TChartSeriesLegend.SetOnCreate(AValue: TLegendItemCreateEvent);
begin
if TMethod(FOnCreate) = TMethod(AValue) then exit;
FOnCreate := AValue;
StyleChanged(Self);
end;
procedure TChartSeriesLegend.SetOrder(AValue: Integer);
begin
if FOrder = AValue then exit;
FOrder := AValue;
StyleChanged(Self);
end;
procedure TChartSeriesLegend.SetTextFormat(AValue: TChartTextFormat);
begin
if FTextFormat = AValue then exit;
FTextFormat := AValue;
StyleChanged(Self);
end;
procedure TChartSeriesLegend.SetUserItemsCount(AValue: Integer);
begin
if FUserItemsCount = AValue then exit;
FUserItemsCount := AValue;
StyleChanged(Self);
end;
procedure SkipObsoleteProperties;
const
MARGIN_NOTE = 'Obsolete, use Legend.MarginX instead';
begin
RegisterPropertyToSkip(TChartLegend, 'Margin', MARGIN_NOTE, '');
end;
initialization
SkipObsoleteProperties;
end.
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