"TfrxComponent"是所有FastReport组件的基类，这种类型的对象拥有“coordinates”, “size”, “font” ，“visibility” 以及一系列子对象。该类用过多种方法，允许保存和恢复对象状态。本文主要介绍FastReport VCL报表的的类层次结构中的"TfrxComponent"基类。
TfrxComponent = class(TComponent) protected procedure SetParent(AParent: TfrxComponent); virtual; procedure SetLeft(Value: Extended); virtual; procedure SetTop(Value: Extended); virtual; procedure SetWidth(Value: Extended); virtual; procedure SetHeight(Value: Extended); virtual; procedure SetFont(Value: TFont); virtual; procedure SetParentFont(Value: Boolean); virtual; procedure SetVisible(Value: Boolean); virtual; procedure FontChanged(Sender: TObject); virtual; public constructor Create(AOwner: TComponent); override; procedure Assign(Source: TPersistent); override; procedure Clear; virtual; procedure CreateUniqueName; procedure LoadFromStream(Stream: TStream); virtual; procedure SaveToStream(Stream: TStream); virtual; procedure SetBounds(ALeft, ATop, AWidth, AHeight: Extended); function FindObject(const AName: String): TfrxComponent; class function GetDescription: String; virtual;
property Objects: TList readonly; property AllObjects: TList readonly; property Parent: TfrxComponent; property Page: TfrxPage readonly; property Report: TfrxReport readonly; property IsDesigning: Boolean; property IsLoading: Boolean; property IsPrinting: Boolean; property BaseName: String; property Left: Extended; property Top: Extended; property Width: Extended; property Height: Extended; property AbsLeft: Extended readonly; property AbsTop: Extended readonly; property Font: TFont; property ParentFont: Boolean; property Restrictions: TfrxRestrictions; property Visible: Boolean; end;
Clear：清除对象内容，并删除它的所有子对象 CreateUniqueName：创建对象的唯一名称 LoadFromStream：加载对象以及流中的所有子对象 SaveToStream：保存对象到流 SetBounds：设定对象的坐标和大小 FindObject：在子对象中搜索指定了名称的对象 GetDescription：返回对象描述当你修改相应的属性时候，会调用下列方法。如何你需要额外处理，你需要覆盖它们。
- SetParent - SetLeft - SetTop - SetWidth - SetHeight - SetFont - SetParentFont - SetVisible - FontChanged
在“TfrxComponent”类中定义了以下属性：
Objects：list of child objects AllObjects：list of all subordinate objects Parent： link to parent object Page：link to report page on which object resides Report link：to report in which object appears IsDesigning： “True” if designer is running IsLoading ：“True” if object is being loaded from stream IsPrinting ：“True” if object is being printed out BaseName： object base name; this value is used in “CreateUniqueName” method Left object： X-coordinate (relative to parent) Top ：object Y-coordinate (relative to parent) Width： object width Height ：object height AbsLeft ：object absolute X-coordinate AbsTop ：object absolute Y-coordinate Font ：object font ParentFont： if “True” then uses parent object font settings Restrictionsset of flags which restricts one or more object operations Visible ：object visibility
转载于:https://www.cnblogs.com/FastReport/archive/2012/11/28/2792160.html
相关资源：FastReport帮助文档（PDF\WORD\CHM三种格式）