Delphi: Minimize application to systray
- by marco92w
I want to minimize a Delphi application to the systray instead of the task bar.
The necessary steps seem to be the following:
Create icon which should then be displayed in the systray.
When the user clicks the [-] to minimize the application, do the following:
Hide the form.
Add the icon (step #1) to the systray.
Hide/delete the application's entry in the task bar.
When the user double-clicks the application's icon in the systray, do the following:
Show the form.
Un-minimize the application again and bring it to the front.
If "WindowState" is "WS_Minimized" set to "WS_Normal".
Hide/delete the application's icon in the systray.
When the user terminates the application, do the following:
Hide/delete the application's icon in the systray.
That's it. Right?
How could one implement this in Delphi?
I've found the following code but I don't know why it works. It doesn't follow my steps described above ...
unit uMinimizeToTray;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ShellApi;
const WM_NOTIFYICON = WM_USER+333;
type
TMinimizeToTray = class(TForm)
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure CMClickIcon(var msg: TMessage); message WM_NOTIFYICON;
private
{ Private-Deklarationen }
public
{ Public-Deklarationen }
end;
var
MinimizeToTray: TMinimizeToTray;
implementation
{$R *.dfm}
procedure TMinimizeToTray.CMClickIcon(var msg: TMessage);
begin
if msg.lparam = WM_LBUTTONDBLCLK then Show;
end;
procedure TMinimizeToTray.FormCreate(Sender: TObject);
VAR tnid: TNotifyIconData;
HMainIcon: HICON;
begin
HMainIcon := LoadIcon(MainInstance, 'MAINICON');
Shell_NotifyIcon(NIM_DELETE, @tnid);
tnid.cbSize := sizeof(TNotifyIconData);
tnid.Wnd := handle;
tnid.uID := 123;
tnid.uFlags := NIF_MESSAGE or NIF_ICON or NIF_TIP;
tnid.uCallbackMessage := WM_NOTIFYICON;
tnid.hIcon := HMainIcon;
tnid.szTip := 'Tooltip';
Shell_NotifyIcon(NIM_ADD, @tnid);
end;
procedure TMinimizeToTray.FormClose(Sender: TObject; var Action: TCloseAction);
begin
Action := caNone;
Hide;
end;
end.
