如何使用Delphi在活动显示的右下角显示消息窗口

Question

这些天你看到很多软件在活动屏幕的右下角显示消息窗口几秒钟或者直到点击关闭按钮（fi Norton在检查下载后执行此操作）。

我想使用Delphi 7 （如果可能的话， Delphi 2010 ，因为我正在慢慢地将我的代码迁移到最新版本）。

我在这里发现了一些关于没有获得焦点的表格的帖子，但这只是问题的一部分。 我也在考虑如何确定这个消息窗口的确切位置（知道用户可能已经将他的任务栏放在屏幕右侧）。

Thx提前。

更新1月26日，10： 从drorhan的代码开始，我创建了以下表单（在Delphi 7中），无论任务栏是显示在schreen的底部，右侧，左侧还是顶部，它都有效。

fPopupMessage.dpr:

  object frmPopupMessage: TfrmPopupMessage
    Left = 537
    Top = 233
    AlphaBlend = True
    AlphaBlendValue = 200
    BorderStyle = bsToolWindow
    Caption = 'frmPopupMessage'
    ClientHeight = 48
    ClientWidth = 342
    Color = clBtnFace
    Font.Charset = DEFAULT_CHARSET
    Font.Color = clWindowText
    Font.Height = -11
    Font.Name = 'MS Sans Serif'
    Font.Style = []
    OldCreateOrder = False
    OnClose = FormClose
    OnCreate = FormCreate
    DesignSize = (
      342
      48)
    PixelsPerInch = 96
    TextHeight = 13
    object img: TImage
      Left = 0
      Top = 0
      Width = 64
      Height = 48
      Align = alLeft
      Center = True
      Transparent = True
    end
    object lblMessage: TLabel
      Left = 72
      Top = 8
      Width = 265
      Height = 34
      Alignment = taCenter
      Anchors = [akLeft, akTop, akRight, akBottom]
      AutoSize = False
      Caption = '...'
      Font.Charset = DEFAULT_CHARSET
      Font.Color = clNavy
      Font.Height = -11
      Font.Name = 'Verdana'
      Font.Style = [fsBold]
      ParentFont = False
      Transparent = True
      WordWrap = True
    end
    object tmr: TTimer
      Enabled = False
      Interval = 3000
      OnTimer = tmrTimer
      Left = 16
      Top = 16
    end
  end

和

fPopupMessage.pas

  unit fPopupMessage;

  interface

  uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls, ExtCtrls, ImgList;

  type
    TfrmPopupMessage = class(TForm)
      tmr: TTimer;
      img: TImage;
      lblMessage: TLabel;
      procedure FormCreate(Sender: TObject);
      procedure tmrTimer(Sender: TObject);
      procedure FormClose(Sender: TObject; var Action: TCloseAction);
    private
      { Private declarations }
      bBeingDisplayed : boolean;
      function GetPopupMessage: string;
      procedure SetPopupMessage(const Value: string);
      function GetPopupCaption: string;
      procedure SetPopupCaption(const Value: string);
      function TaskBarHeight: integer;
      function TaskBarWidth: integer;
      procedure ToHiddenPosition;
      procedure ToVisiblePosition;
    public
      { Public declarations }
      procedure StartAnimationToHide;
      procedure StartAnimationToShow;
      property PopupCaption: string read GetPopupCaption write SetPopupCaption;
      property PopupMessage: string read GetPopupMessage write SetPopupMessage;
    end;

  var
    frmPopupMessage: TfrmPopupMessage;

  procedure DisplayPopup( sMessage:string; sCaption:string = '');

  implementation

  {$R *.dfm}

  const
     DFT_TIME_SLEEP = 5;       // the speed you want to show/hide.Increase/descrease this to make it faster or slower
     DFT_TIME_VISIBLE = 3000;  // number of mili-seconds the form is visible before starting to disappear
     GAP = 2;                  // pixels between form and right and bottom edge of the screen

  procedure DisplayPopup( sMessage:string; sCaption:string = '');
  begin
     // we could create the form here if necessary ...
     if not Assigned(frmPopupMessage) then Exit;

     frmPopupMessage.PopupCaption := sCaption;
     frmPopupMessage.PopupMessage := sMessage;
     if not frmPopupMessage.bBeingDisplayed
     then begin
        ShowWindow( frmPopupMessage.Handle, SW_SHOWNOACTIVATE);
        frmPopupMessage.Visible := True;
     end;
     frmPopupMessage.StartAnimationToShow;
  end;

  procedure TfrmPopupMessage.FormCreate(Sender: TObject);
  begin
    img.Picture.Assign(Application.Icon);
    Caption := '';
    lblMessage.Caption := '';
    bBeingDisplayed := False;

    ToHiddenPosition();
  end;

  procedure TfrmPopupMessage.FormClose(Sender: TObject; var Action: TCloseAction);
  begin
     tmr.Enabled := False;
     Action := caHide;
     bBeingDisplayed := False;
  end;

  function TfrmPopupMessage.TaskBarHeight: integer; // this is just to get the taskbar height to put
  // my form in the correct position
  var
    hTB: HWND;
    TBRect: TRect;
  begin
    hTB := FindWindow('Shell_TrayWnd', '');
    if hTB = 0 then
      Result := 0
    else
    begin
      GetWindowRect(hTB, TBRect);
      if TBRect.Top = 0  // tray bar is positioned to the left or to the right
      then
         Result := 1
      else
         Result := TBRect.Bottom - TBRect.Top;
    end;
  end;

  function TfrmPopupMessage.TaskBarWidth: integer; // this is just to get the taskbar height to put
  // my form in the correct position
  var
    hTB: HWND;
    TBRect: TRect;
  begin
    hTB := FindWindow('Shell_TrayWnd', '');
    if hTB = 0 then
      Result := 0
    else
    begin
      GetWindowRect(hTB, TBRect);
      if TBRect.Left = 0  // tray bar is positioned to the left or to the right
      then
         Result := 1
      else
         Result := TBRect.Right - TBRect.Left
    end;
  end;

  procedure TfrmPopupMessage.ToHiddenPosition;
  begin
    Self.Left := Screen.Width - TaskbarWidth - Self.Width - GAP;
    Self.Top := Screen.Height - TaskBarHeight;
  end;

  procedure TfrmPopupMessage.ToVisiblePosition;
  begin
    Self.Left := Screen.Width - TaskBarWidth - Self.Width - GAP;
    Self.Top := Screen.Height - Self.Height - TaskBarHeight - GAP;
  end;

  procedure TfrmPopupMessage.StartAnimationToShow;
  var
    i: integer;
  begin
    if bBeingDisplayed
    then
       ToVisiblePosition()
    else begin
       ToHiddenPosition();

       for i := 1 to Self.Height+GAP do
       begin
         Self.Top := Self.Top-1;
         Application.ProcessMessages;
         Sleep(DFT_TIME_SLEEP);
       end;
    end;
    tmr.Interval := DFT_TIME_VISIBLE;
    tmr.Enabled := True;
    bBeingDisplayed := True;

  end;

  procedure TfrmPopupMessage.StartAnimationToHide;
  var
    i: integer;
  begin
    if not bBeingDisplayed then Exit;

    for i := 1 to Self.Height+GAP do
    begin
      Self.Top := Self.Top+1;
      Application.ProcessMessages;
      Sleep(DFT_TIME_SLEEP);
    end;
    bBeingDisplayed := False;
    Visible := False;
  end;

  procedure TfrmPopupMessage.tmrTimer(Sender: TObject);
  begin
     tmr.Enabled := False;
     StartAnimationToHide();
  end;

  function TfrmPopupMessage.GetPopupMessage: string;
  begin
     Result := lblMessage.Caption;
  end;

  procedure TfrmPopupMessage.SetPopupMessage(const Value: string);
  begin
     lblMessage.Caption := Value;
  end;

  function TfrmPopupMessage.GetPopupCaption: string;
  begin
     Result := frmPopupMessage.Caption;
  end;

  procedure TfrmPopupMessage.SetPopupCaption(const Value: string);
  begin
     frmPopupMessage.Caption := Value;
  end;

  end.

要在我的测试表单中使用两个按钮：

procedure TfrmMain.button1Click(Sender: TObject);
begin
   DisplayPopup('Message displayed at ' + FormatDateTime('ddd mmm yy zzz', Now),'My Program');
   beep;
end;

procedure TfrmMain.button2Click(Sender: TObject);
begin
   DisplayPopup('Another message displayed at ' + FormatDateTime('hh:nn zzz', Now),'My Program');
end;

消息表单将显示应用程序图标，但我可能会添加一个TImageList并添加一个属性来传递图像索引，以便我可以显示不同的图标。 我还将使用Dev.Express组件中的TcxLabel，因为这将提供Verticle定位，但上述单元可以按原样使用。

我用Delphi 7和Windows XP进行了测试。 如果有人将此装置与其他版本的Delphi和/或Windows Vista或Windows 7一起使用，请告诉我该装置是否也适用于此。

Answer 1

尝试使用JVCL中包含的TJvDesktopAlert组件，您可以在jvcl \\ examples \\ JvDesktopAlert \\ JvDesktopAlertDemo.dpr中找到示例。

_{（来源： agnisoft.com ）}

Answer 2

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
  function TaskBarHeight: integer; // this is just to get the taskbar height to put
  // my form in the correct position
  var
    hTB: HWND;
    TBRect: TRect;
  begin
    hTB := FindWindow('Shell_TrayWnd', '');
    if hTB = 0 then
      Result := 0
    else
    begin
      GetWindowRect(hTB, TBRect);
      Result := TBRect.Bottom - TBRect.Top;
    end;
  end;

begin
  Self.Left := Screen.Width - Self.Width;
  Self.Top := Screen.Height-Self.Height-TaskBarHeight;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  i: integer;
  TimeSleep: integer;
begin
  TimeSleep := 5; // the speed you want to show/hide.Increase/descrease this to make it faster or slower
  for i := 1 to Self.Height do
  begin
    Self.Top := Self.Top+1;
    Sleep(TimeSleep);
  end;
  // now let's show it again(use this as code as the show code)
  for i := 1 to Self.Height do
  begin
    Self.Top := Self.Top-1;
    Sleep(TimeSleep);
  end;
end;

end.

通过http://www.experts-exchange.com/Programming/Languages/Pascal/Delphi/Q_25043483.html

Answer 3

您要搜索的是系统托盘中的气球提示。 对于一般的WinAPI，这是一个很好的教程 ，你不应该有翻译到Delphi的问题。

您可以在这里找到Delphi中的气球提示的一些现成的代码。

这里有一个很好的实现。

Answer 4

你可以查看任务栏的位置：

uses ShellAPI;
//...
Var AppBar: TAppbarData;
//...
begin
  FillChar(AppBar, sizeof(AppBar), 0);
  AppBar.cbSize := Sizeof(AppBar);

  if ShAppBarMessage(ABM_GETTASKBARPOS, AppBar) <> 0 then
  begin
    //AppBar.rc is TRect
  end;
end;

然后展示你的表格......

Answer 5

您可以使用Growl for Windows - 我认为它还没有Delphi库，但您可以通过UDP消息控制它，因此任何网络库都应该这样做。

Answer 6

TMsnPopUpNotify

http://www.torry.net/vcl/forms/appearence/tmsnpopup.zip

Answer 7

查看Snarl，类似于Growl for Windows，但我发现它更好。 有一个Pas文件可以轻松连接，它的工作方式非常简单，只需发送Windows消息。

http://fullphat.net/

它还允许最终用户控制哪些消息，衰落前的持续时间等。