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| unit Utest;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
ShellAPI, Dialogs, StdCtrls;
const
wm_AppBarMessage = wm_User;
type
TFrmAppBar = class(TForm)
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure FormActivate(Sender: TObject);
procedure FormShow(Sender: TObject);
private
{ Déclarations privées }
AppData: _AppBarData; //Appbars structure
function GetRequestRect: TRect;
procedure WMAppBarMessage(var Msg: TMessage); message wm_AppBarMessage;
procedure WMWindowPosChanged(var Msg: TWMWindowPosMsg); message WM_WindowPosChanged;
procedure WMMoving(var Msg: TMessage); message WM_Moving;
procedure WMExitSizeMove(var Msg: TMessage); message WM_ExitSizeMove;
property RequestRect: TRect read GetRequestRect;
public
{ Déclarations publiques }
procedure CreateParams(var Params: TCreateParams); override;
end;
var
FrmAppBar : TFrmAppBar;
implementation
{$R *.dfm}
procedure TFrmAppBar.FormCreate(Sender: TObject);
var
HndAppBar: hwnd;
begin
// fill the AppBarData data structure
AppData.cbSize := sizeof(AppData);
AppData.hWnd := Handle;
AppData.uCallBackMessage := wm_AppBarMessage;
// always start along bottom edge
AppData.uEdge := ABE_BOTTOM;
AppData.rc := RequestRect;
AppData.lParam := 0;
SHAppBarMessage(ABM_NEW, AppData);
end;
procedure TFrmAppBar.FormClose(Sender: TObject; var Action: TCloseAction);
begin
SHAppBarMessage(ABM_REMOVE,AppData); //Remove it on close
end;
procedure TFrmAppBar.FormActivate(Sender: TObject);
begin
SHAppBarMessage(ABM_ACTIVATE,AppData);
end;
procedure TFrmAppBar.FormShow(Sender: TObject);
begin
ShowWindow(Application.Handle, SW_HIDE);
SHAppBarMessage(ABM_QUERYPOS, AppData);
AppData.rc.Top := AppData.rc.Bottom - Height;
SHAppBarMessage(ABM_SETPOS, AppData);
SetBounds(AppData.rc.Left, AppData.rc.Top, AppData.rc.Right-AppData.rc.Left, AppData.rc.Bottom-AppData.rc.Top);
end;
procedure TFrmAppBar.CreateParams(var Params: TCreateParams);
begin
inherited CreateParams(Params);
if Params.ExStyle and WS_EX_TOOLWINDOW = 0 then
Params.ExStyle := Params.ExStyle + WS_EX_TOOLWINDOW;
end;
function TFrmAppBar.GetRequestRect: TRect;
begin
// set the requested Rect
Result.Left := 0;
Result.Top := Screen.Height - 50;
Result.Right := Screen.Width;
Result.Bottom := Screen.Height;
case AppData.uEdge of
ABE_TOP: begin
Result.Left := 0;
Result.Top := 0;
Result.Right := Screen.Width;
Result.Bottom := 50;
end;
ABE_LEFT: begin
Result.Left := 0;
Result.Top := 0;
Result.Right := 50;
Result.Bottom := Screen.Height;
end;
ABE_RIGHT: begin
Result.Left := Screen.Width-50;
Result.Top := 0;
Result.Right := Screen.Width;
Result.Bottom := Screen.Height;
end;
end;
end;
procedure TFrmAppBar.WMAppBarMessage(var Msg: TMessage);
begin
// hide when fullscreen apps are displayed
if Msg.wParam = ABN_FULLSCREENAPP then
if Msg.lParam <> 0 then Hide else Show;
if Msg.wParam = ABN_POSCHANGED then
begin
// fill the AppBarData data structure
AppData.rc := RequestRect;
SHAppBarMessage(ABM_QUERYPOS, AppData);
case AppData.uEdge of
ABE_TOP: AppData.rc.Bottom := AppData.rc.Top + 50;
ABE_LEFT: AppData.rc.Right := AppData.rc.Left + 50;
ABE_RIGHT: AppData.rc.Left := AppData.rc.Right - 50;
ABE_BOTTOM: AppData.rc.Top := AppData.rc.Bottom - 50;
end;
SHAppBarMessage(ABM_SETPOS, AppData);
SetBounds(AppData.rc.Left, AppData.rc.Top, AppData.rc.Right-AppData.rc.Left, AppData.rc.Bottom-AppData.rc.Top);
end;
end;
procedure TFrmAppBar.WMWindowPosChanged(var Msg: TWMWindowPosMsg);
begin
// must send this message to maintain correct Z-order
SHAppBarMessage(ABM_WINDOWPOSCHANGED, AppData);
inherited;
end;
procedure TFrmAppBar.WMMoving(var Msg: TMessage);
var
P: TPoint;
begin
GetCursorPos(P);
if (P.Y < Screen.Height/Screen.Width*P.X) and (P.Y < -(Screen.Height/Screen.Width*P.X)+Screen.Height) then
begin
AppData.uEdge := ABE_TOP;
AppData.rc := RequestRect;
SHAppBarMessage(ABM_QUERYPOS, AppData);
AppData.rc.Bottom := AppData.rc.Top + 50;
PRect(Msg.lParam)^ := AppData.rc;
end;
if (P.Y >= Screen.Height/Screen.Width*P.X) and (P.Y < -(Screen.Height/Screen.Width*P.X)+Screen.Height) then
begin
AppData.uEdge := ABE_LEFT;
AppData.rc := RequestRect;
SHAppBarMessage(ABM_QUERYPOS, AppData);
AppData.rc.Right := AppData.rc.Left + 50;
PRect(Msg.lParam)^ := AppData.rc;
end;
if (P.Y >= Screen.Height/Screen.Width*P.X) and (P.Y >= -(Screen.Height/Screen.Width*P.X)+Screen.Height) then
begin
AppData.uEdge := ABE_BOTTOM;
AppData.rc := RequestRect;
SHAppBarMessage(ABM_QUERYPOS, AppData);
AppData.rc.Top := AppData.rc.Bottom - 50;
PRect(Msg.lParam)^ := AppData.rc;
end;
if (P.Y < Screen.Height/Screen.Width*P.X) and (P.Y >= -(Screen.Height/Screen.Width*P.X)+Screen.Height) then
begin
AppData.uEdge := ABE_RIGHT;
AppData.rc := RequestRect;
SHAppBarMessage(ABM_QUERYPOS, AppData);
AppData.rc.Left := AppData.rc.Right - 50;
PRect(Msg.lParam)^ := AppData.rc;
end;
inherited;
end;
procedure TFrmAppBar.WMExitSizeMove(var Msg: TMessage);
begin
SetBounds(AppData.rc.Left, AppData.rc.Top, AppData.rc.Right-AppData.rc.Left, AppData.rc.Bottom-AppData.rc.Top);
SHAppBarMessage(ABM_SETPOS, AppData);
inherited;
end;
end. |
