TAChart: Add TCustomAnimatedChartSource

git-svn-id: trunk@38442 -

.gitattributes

@@ -2996,6 +2996,7 @@ components/tachart/numlib_fix/ipf.pas svneol=native#text/pascal
 components/tachart/numlib_fix/mdt.pas svneol=native#text/pascal
 components/tachart/numlib_fix/sle.pas svneol=native#text/pascal
 components/tachart/numlib_fix/spe.pas svneol=native#text/pascal
+components/tachart/taanimatedsource.pas svneol=native#text/pascal
 components/tachart/tachartaggpas.lpk svneol=native#text/pascal
 components/tachart/tachartaggpas.pas svneol=native#text/pascal
 components/tachart/tachartaxis.pas svneol=native#text/pascal

components/tachart/taanimatedsource.pas

@@ -0,0 +1,222 @@
+{
+
+ *****************************************************************************
+ *                                                                           *
+ *  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.                     *
+ *                                                                           *
+ *****************************************************************************
+
+ Authors: Alexander Klenin
+
+}
+
+unit TAAnimatedSource;
+
+{$H+}
+
+interface
+
+uses
+  Classes, CustomTimer,
+  TAChartUtils, TACustomSource;
+
+type
+  TCustomAnimatedChartSource = class;
+
+  TAnimatedChartSourceItemEvent = procedure (
+    ASender: TCustomAnimatedChartSource;
+    AIndex: Integer; var AItem: TChartDataItem) of object;
+  TAnimatedChartSourceEvent = procedure (
+    ASender: TCustomAnimatedChartSource) of object;
+
+  TCustomAnimatedChartSource = class(TCustomChartSource)
+  strict private
+    FAnimationInterval: Cardinal;
+    FAnimationTime: Cardinal;
+    FCurrentStep: Cardinal;
+    FItem: TChartDataItem;
+    FListener: TListener;
+    FOnGetItem: TAnimatedChartSourceItemEvent;
+    FOnStop: TAnimatedChartSourceEvent;
+    FOrigin: TCustomChartSource;
+    FProjectedSteps: Cardinal;
+    FSkippedFramesCount: Cardinal;
+    FStartTime: Cardinal;
+    FTimer: TCustomTimer;
+    procedure Changed(ASender: TObject);
+    procedure OnTimer(ASender: TObject);
+    procedure SetOrigin(AValue: TCustomChartSource);
+  protected
+    function GetCount: Integer; override;
+    function GetItem(AIndex: Integer): PChartDataItem; override;
+    procedure SetYCount(AValue: Cardinal); override;
+  public
+    constructor Create(AOwner: TComponent); override;
+    destructor Destroy; override;
+
+    function Extent: TDoubleRect; override;
+    function ExtentCumulative: TDoubleRect; override;
+    function ExtentList: TDoubleRect; override;
+
+    function IsAnimating: Boolean; inline;
+    function Progress: Double; inline;
+    procedure Start;
+    procedure Stop(ACallEvent: Boolean = false);
+
+    property CurrentStep: Cardinal read FCurrentStep;
+    property ProjectedSteps: Cardinal read FProjectedSteps;
+    property SkippedFramesCount: Cardinal read FSkippedFramesCount;
+  published
+    property AnimationInterval: Cardinal
+      read FAnimationInterval write FAnimationInterval default 0;
+    property AnimationTime: Cardinal
+      read FAnimationTime write FAnimationTime default 0;
+    property Origin: TCustomChartSource read FOrigin write SetOrigin;
+  published
+    property OnGetItem: TAnimatedChartSourceItemEvent
+      read FOnGetItem write FOnGetItem;
+    property OnStop: TAnimatedChartSourceEvent read FOnStop write FOnStop;
+  end;
+
+implementation
+
+uses
+  LCLIntf, Math, SysUtils;
+
+{ TCustomAnimatedChartSource }
+
+procedure TCustomAnimatedChartSource.Changed(ASender: TObject);
+begin
+  Notify;
+end;
+
+constructor TCustomAnimatedChartSource.Create(AOwner: TComponent);
+begin
+  inherited Create(AOwner);
+  FListener := TListener.Create(@FOrigin, @Changed);
+  FTimer := TCustomTimer.Create(nil);
+  FTimer.Enabled := false;
+  FTimer.OnTimer := @OnTimer;
+end;
+
+destructor TCustomAnimatedChartSource.Destroy;
+begin
+  FreeAndNil(FTimer);
+  FreeAndNil(FListener);
+  inherited;
+end;
+
+function TCustomAnimatedChartSource.Extent: TDoubleRect;
+begin
+  if Origin = nil then
+    Result := EmptyExtent
+  else
+    Result := Origin.Extent;
+end;
+
+function TCustomAnimatedChartSource.ExtentCumulative: TDoubleRect;
+begin
+  if Origin = nil then
+    Result := EmptyExtent
+  else
+    Result := Origin.ExtentCumulative;
+end;
+
+function TCustomAnimatedChartSource.ExtentList: TDoubleRect;
+begin
+  if Origin = nil then
+    Result := EmptyExtent
+  else
+    Result := Origin.ExtentList;
+end;
+
+function TCustomAnimatedChartSource.GetCount: Integer;
+begin
+  if Origin = nil then
+    Result := 0
+  else
+    Result := Origin.Count;
+end;
+
+function TCustomAnimatedChartSource.GetItem(AIndex: Integer): PChartDataItem;
+begin
+  if Origin = nil then exit(nil);
+  if not IsAnimating then exit(Origin.Item[AIndex]);
+  FItem := Origin.Item[AIndex]^;
+  Result := @FItem;
+  if Assigned(OnGetItem) then
+    OnGetItem(Self, AIndex, FItem);
+end;
+
+function TCustomAnimatedChartSource.IsAnimating: Boolean;
+begin
+  Result := FTimer.Enabled;
+end;
+
+procedure TCustomAnimatedChartSource.OnTimer(ASender: TObject);
+var
+  d, s: Cardinal;
+begin
+  Unused(ASender);
+  d := GetTickCount - FStartTime;
+  if d >= AnimationTime then
+    Stop(true);
+  s := Round(d * ProjectedSteps / AnimationTime);
+  if FCurrentStep + 1 <> s then
+    FSkippedFramesCount += 1;
+  FCurrentStep := s;
+  Notify;
+end;
+
+function TCustomAnimatedChartSource.Progress: Double;
+begin
+  if ProjectedSteps = 0 then
+    Result := 0
+  else
+    Result := (FCurrentStep - 1) / ProjectedSteps;
+end;
+
+procedure TCustomAnimatedChartSource.SetOrigin(AValue: TCustomChartSource);
+begin
+  if AValue = Self then
+      AValue := nil;
+  if FOrigin = AValue then exit;
+  if FOrigin <> nil then
+    FOrigin.Broadcaster.Unsubscribe(FListener);
+  FOrigin := AValue;
+  if FOrigin <> nil then
+    FOrigin.Broadcaster.Subscribe(FListener);
+end;
+
+procedure TCustomAnimatedChartSource.SetYCount(AValue: Cardinal);
+begin
+  Unused(AValue);
+  raise EYCountError.Create('Can not set YCount');
+end;
+
+procedure TCustomAnimatedChartSource.Start;
+begin
+  Stop;
+  FSkippedFramesCount := 0;
+  if (AnimationInterval = 0) or (AnimationTime <= AnimationInterval) then exit;
+  FProjectedSteps := Round(AnimationTime / AnimationInterval);
+  FStartTime := GetTickCount;
+  FTimer.Interval := AnimationInterval;
+  FTimer.Enabled := true;
+end;
+
+procedure TCustomAnimatedChartSource.Stop(ACallEvent: Boolean);
+begin
+  FTimer.Enabled := false;
+  FCurrentStep := 0;
+  if ACallEvent and Assigned(OnStop) then
+    OnStop(Self);
+end;
+
+end.
+

components/tachart/tachartlazaruspkg.lpk

@@ -34,7 +34,7 @@
  for details about the copyright.
 "/>
     <Version Major="1"/>
-    <Files Count="38">
+    <Files Count="39">
       <Item1>
         <Filename Value="tagraph.pas"/>
         <HasRegisterProc Value="True"/>
@@ -205,6 +205,10 @@
         <Filename Value="tadatatools.pas"/>
         <UnitName Value="TADataTools"/>
       </Item38>
+      <Item39>
+        <Filename Value="taanimatedsource.pas"/>
+        <UnitName Value="TAAnimatedSource"/>
+      </Item39>
     </Files>
     <LazDoc Paths="$(LazarusDir)\components\tachart\fpdoc"/>
     <Type Value="RunAndDesignTime"/>

components/tachart/tachartlazaruspkg.pas

@@ -13,7 +13,8 @@ uses
   TALegendPanel, TARadialSeries, TACustomSource, TAGeometry, TANavigation, 
   TADrawerCanvas, TADrawerSVG, TAIntervalSources, TAChartAxisUtils, 
   TAChartListbox, TAEnumerators, TADataPointsEditor, TAChartExtentLink, 
-  TAToolEditors, TAMath, TAChartImageList, TADataTools, LazarusPackageIntf;
+  TAToolEditors, TAMath, TAChartImageList, TADataTools, TAAnimatedSource, 
+  LazarusPackageIntf;
 
 implementation
 

components/tachart/tacustomsource.pas

@@ -163,9 +163,9 @@ type
     function IsUpdating: Boolean; inline;
   public
     class procedure CheckFormat(const AFormat: String);
-    function Extent: TDoubleRect;
-    function ExtentCumulative: TDoubleRect;
-    function ExtentList: TDoubleRect;
+    function Extent: TDoubleRect; virtual;
+    function ExtentCumulative: TDoubleRect; virtual;
+    function ExtentList: TDoubleRect; virtual;
     procedure FindBounds(AXMin, AXMax: Double; out ALB, AUB: Integer);
     function FormatItem(
       const AFormat: String; AIndex, AYIndex: Integer): String;

components/tachart/tasources.pas

@@ -1082,7 +1082,7 @@ destructor TCalculatedChartSource.Destroy;
 begin
   FreeAndNil(FHistory);
   FreeAndNil(FListener);
-  inherited Destroy;
+  inherited;
 end;
 
 function TCalculatedChartSource.EffectiveAccumulationRange: Cardinal;

components/tachart/tatools.pas

@@ -478,7 +478,6 @@ type
     destructor Destroy; override;
     procedure Draw(AChart: TChart; ADrawer: IChartDrawer); override;
     procedure Hide; virtual;
-    procedure KeyDown(APoint: TPoint); override;
   published
     property DrawingMode;
     property GrabRadius default 20;
@@ -500,6 +499,7 @@ type
   public
     constructor Create(AOwner: TComponent); override;
     procedure Draw(AChart: TChart; ADrawer: IChartDrawer); override;
+    procedure KeyDown(APoint: TPoint); override;
     procedure MouseMove(APoint: TPoint); override;
     property Position: TDoublePoint read FPosition;
   published
@@ -1661,11 +1661,6 @@ begin
   Deactivate;
 end;
 
-procedure TDataPointDrawTool.KeyDown(APoint: TPoint);
-begin
-  MouseMove(APoint);
-end;
-
 procedure TDataPointDrawTool.SetPen(AValue: TChartPen);
 begin
   FPen.Assign(AValue);
@@ -1711,6 +1706,11 @@ begin
   inherited;
 end;
 
+procedure TDataPointCrosshairTool.KeyDown(APoint: TPoint);
+begin
+  MouseMove(APoint);
+end;
+
 procedure TDataPointCrosshairTool.MouseMove(APoint: TPoint);
 begin
   DoHide;