Install Setup 2013-02-02 11:31 378人阅读 评论(0) 收藏 举报
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：