描述
此应用程序展示了如何使用Application变量。该应用程序还使用Screen变量来显示有关该应用程序在其中运行的屏幕的一些信息。
代码
unit Unit1;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
var
ModalForm1, ModalForm2, ModalForm3: TForm;
begin
// 将应用程序的默认字体更改为System
Application.DefaultFont.Name := 'System';
// 更改在消息框中显示文本时使用的字体
Screen.MessageFont.Name := 'Courier';
// 将应用程序的弹出模式更改为pmAuto
Application.ModalPopupMode := pmAuto;
// 创建一些模态窗体并显示它们
ModalForm1 := TForm.Create(Form1);
ModalForm1.Caption := 'Modal Form 1';
ModalForm1.Color := clRed;
ModalForm1.Hint := 'Close this modal form to show another';
ModalForm1.ShowHint := True;
ModalForm1.ShowModal;
Application.ModalStarted;
//添加ModalForm1作为应用程序的弹出表单
Application.AddPopupForm(ModalForm1);
ModalForm2 := TForm.Create(Form1);
ModalForm2.Caption := 'Modal Form 2';
ModalForm2.Color := clGreen;
ModalForm2.Hint := '关闭此模态窗体,并显示另一个';
ModalForm2.ShowHint := True;
ModalForm2.ShowModal;
Application.ModalStarted;
ModalForm3 := TForm.Create(Form1);
ModalForm3.Caption := 'Modal Form 3';
ModalForm3.Color := clBlue;
ModalForm3.Hint := '关闭此模态窗体,并显示主窗体';
ModalForm3.ShowHint := True;
ModalForm3.ShowModal;
Application.ModalStarted;
//显示显示的模态窗体的总数
ShowMessage('一共有' + IntToStr(Application.ModalLevel) + ' 个模态窗体显示');
// 从Application中使用的弹出窗体数组中删除ModalForm1
Application.RemovePopupForm(ModalForm1);
// 显示应用程序运行时的屏幕的一些信息
ShowMessage('可用光标的数量: ' + IntToStr(Screen.CursorCount));
ShowMessage('焦点窗口的数量: ' + IntToStr(Screen.SaveFocusedList.Count));
end;
end.