Inno Setup入门（二十一）——Inno Setup类参考（7）

复选框  

    复选框（CheckBox）用于多个并不互斥的几个选项中作出一个或者多选择，例如字体可以有粗体、斜体和下划线，这三种状态可以任意组合，像这样的选项可以采用复选框实现。Pascal脚本中对应的类是TcheckBox，其定义如下：< xmlnamespace prefix ="o" ns ="urn:schemas-microsoft-com:office:office" />

TCheckBox = class(TCustomCheckBox)

  property Alignment: TAlignment; read write;

  property AllowGrayed: Boolean; read write;

  property Caption: String; read write;

  property Checked: Boolean; read write;

  property Color: TColor; read write;

  property Font: TFont; read write;

  < xmlnamespace prefix ="st1" ns ="urn:schemas-microsoft-com:office:smarttags" />property State: TCheckBoxState; read write;

  property OnClick: TNotifyEvent; read write;

end;

       其层次模型如下：

该类比RadioBox多继承了一个TcustomCheckBox，这样就有了更多的功能。下面的代码将演示复选框的使用：

[setup] AppName=Test AppVerName=TEST DefaultDirName="E:\TEST" AppVersion=1.0   [files] Source:zzz.iss;Flags:dontcopy   [code] var myPage:TWizardPage; lbl:TLabel; chk1,chk2,chk3:TCheckBox; procedure ClickCHK1(Sender:TObject); begin        if chk1.Checked then               lbl.Font.Style:=lbl.Font.Style+[fsBold]        else               lbl.Font.Style:=lbl.Font.Style-[fsBold]; end; procedure ClickCHK2(Sender:TObject); begin        if chk2.Checked then               lbl.Font.Style:=lbl.Font.Style+[fsItalic]        else               lbl.Font.Style:=lbl.Font.Style-[fsItalic]; end; procedure ClickCHK3(Sender:TObject); begin        if chk3.Checked then               lbl.Font.Style:=lbl.Font.Style+[fsUnderline]        else               lbl.Font.Style:=lbl.Font.Style-[fsUnderline]; end; procedure InitializeWizard(); begin        myPage:=CreateCustomPage(wpWelcome, '标题：自定义页面', '描述：这是我的自定义页面');        lbl:=TLabel.Create(myPage);        lbl.Parent:=myPage.Surface;        lbl.Caption:='请选择复选框，并注意文字的变化';        chk1:=TCheckBox.Create(myPage);        chk1.Parent:=myPage.Surface;        chk1.Caption:='粗体';        chk1.top:=lbl.Top+20;        chk1.OnClick:=@ClickCHK1;        chk2:=TCheckBox.Create(myPage);        chk2.Parent:=myPage.Surface;        chk2.Caption:='斜体';        chk2.top:=chk1.Top+20;        chk2.OnClick:=@ClickCHK2;        chk3:=TCheckBox.Create(myPage);        chk3.Parent:=myPage.Surface;        chk3.Caption:='下划线';        chk3.top:=chk2.Top+20;        chk3.OnClick:=@ClickCHK3; end;

程序运行效果如下：

       另外复选框还有一个重要的属性就是State，该属性指定了复选框的外观，可以有三个值，分别是cbUnchecked、 cbChecked和cbGrayed，即未选择、选择和未定，可以使用如下代码设定：

chk1.State:=cbUnchecked; chk2.State:=cbChecked; chk3.State:=cbGrayed;

效果如下：