使 Delphi 应用程序(Delphi 2007 for Win32)完全全屏、删除应用程序边框并覆盖 Windows 任务栏的最佳方法是什么?
我正在寻找类似于 Internet Explorer (IE) 在按 F11 时执行的操作。
我希望这是用户的运行时选项,而不是我自己在设计时做出的决定。
正如已接受的答案中提到的
BorderStyle := bsNone;
是实现这一目标的一部分。奇怪的是,我在使用该行时不断收到
E2010 Incompatible types: 'TFormBorderStyle' and 'TBackGroundSymbol'
错误(另一种类型定义了 bsNone
)。
为了克服这个问题,我必须使用:
BorderStyle := Forms.bsNone;
嗯,这一直对我有用。看起来简单一点...
procedure TForm52.Button1Click(Sender: TObject);
begin
BorderStyle := bsNone;
WindowState := wsMaximized;
end;
Google 搜索发现了以下附加方法:
(虽然我想我会先尝试罗迪的方法)
procedure TSomeForm.FormShow(Sender: TObject) ;
var
r : TRect;
begin
Borderstyle := bsNone;
SystemParametersInfo
(SPI_GETWORKAREA, 0, @r,0) ;
SetBounds
(r.Left, r.Top, r.Right-r.Left, r.Bottom-r.Top) ;
end;
FormStyle := fsStayOnTop;
BorderStyle := bsNone;
Left := 0;
Top := 0;
Width := Screen.Width;
Height := Screen.Height;
private // in form declaration
Procedure WMGetMinMaxInfo(Var msg: TWMGetMinMaxInfo);
message WM_GETMINMAXINFO;
Procedure TForm1.WMGetMinMaxInfo(Var msg: TWMGetMinMaxInfo);
Begin
inherited;
With msg.MinMaxInfo^.ptMaxTrackSize Do Begin
X := GetDeviceCaps( Canvas.handle, HORZRES ) + (Width - ClientWidth);
Y := GetDeviceCaps( Canvas.handle, VERTRES ) + (Height - ClientHeight
);
End;
End;
procedure TForm1.Button2Click(Sender: TObject);
Const
Rect: TRect = (Left:0; Top:0; Right:0; Bottom:0);
FullScreen: Boolean = False;
begin
FullScreen := not FullScreen;
If FullScreen Then Begin
Rect := BoundsRect;
SetBounds(
Left - ClientOrigin.X,
Top - ClientOrigin.Y,
GetDeviceCaps( Canvas.handle, HORZRES ) + (Width - ClientWidth),
GetDeviceCaps( Canvas.handle, VERTRES ) + (Height - ClientHeight ));
// Label2.caption := IntToStr(GetDeviceCaps( Canvas.handle, VERTRES ));
End
Else
BoundsRect := Rect;
end;
最大化表单并隐藏标题栏。最大化线是根据内存完成的,但我很确定 WindowState 是您想要的属性。
还有this文章,但对我来说似乎太复杂了。
procedure TForm1.FormCreate(Sender: TObject) ;
begin
//maximize the window
WindowState := wsMaximized;
//hide the title bar
SetWindowLong(Handle,GWL_STYLE,GetWindowLong(Handle,GWL_STYLE) and not WS_CAPTION);
ClientHeight := Height;
end;
编辑:这是一个完整的示例,带有“全屏”和“恢复”选项。为了最大程度地清晰起见,我已将不同的部分分解为小程序,因此可以将其大大压缩为几行。
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
btnGoFullScreen: TButton;
btnNotFullScreen: TButton;
btnShowTitleBar: TButton;
btnHideTitleBar: TButton;
btnQuit: TButton;
procedure btnGoFullScreenClick(Sender: TObject);
procedure btnShowTitleBarClick(Sender: TObject);
procedure btnHideTitleBarClick(Sender: TObject);
procedure btnNotFullScreenClick(Sender: TObject);
procedure btnQuitClick(Sender: TObject);
private
SavedLeft : integer;
SavedTop : integer;
SavedWidth : integer;
SavedHeight : integer;
SavedWindowState : TWindowState;
procedure FullScreen;
procedure NotFullScreen;
procedure SavePosition;
procedure HideTitleBar;
procedure ShowTitleBar;
procedure RestorePosition;
procedure MaximizeWindow;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.btnQuitClick(Sender: TObject);
begin
Application.Terminate;
end;
procedure TForm1.btnGoFullScreenClick(Sender: TObject);
begin
FullScreen;
end;
procedure TForm1.btnNotFullScreenClick(Sender: TObject);
begin
NotFullScreen;
end;
procedure TForm1.btnShowTitleBarClick(Sender: TObject);
begin
ShowTitleBar;
end;
procedure TForm1.btnHideTitleBarClick(Sender: TObject);
begin
HideTitleBar;
end;
procedure TForm1.FullScreen;
begin
SavePosition;
HideTitleBar;
MaximizeWindow;
end;
procedure TForm1.HideTitleBar;
begin
SetWindowLong(Handle,GWL_STYLE,GetWindowLong(Handle,GWL_STYLE) and not WS_CAPTION);
ClientHeight := Height;
end;
procedure TForm1.MaximizeWindow;
begin
WindowState := wsMaximized;
end;
procedure TForm1.NotFullScreen;
begin
RestorePosition;
ShowTitleBar;
end;
procedure TForm1.RestorePosition;
begin
//this proc uses what we saved in "SavePosition"
WindowState := SavedWindowState;
Top := SavedTop;
Left := SavedLeft;
Width := SavedWidth;
Height := SavedHeight;
end;
procedure TForm1.SavePosition;
begin
SavedLeft := Left;
SavedHeight := Height;
SavedTop := Top;
SavedWidth := Width;
SavedWindowState := WindowState;
end;
procedure TForm1.ShowTitleBar;
begin
SetWindowLong(Handle,gwl_Style,GetWindowLong(Handle,gwl_Style) or ws_Caption or ws_border);
Height := Height + GetSystemMetrics(SM_CYCAPTION);
Refresh;
end;
end.
将这样的代码放入表单onShow事件中:
WindowState:=wsMaximized;
还有 OnCanResize 这个:
if (newwidth<width) and (newheight<height) then
Resize:=false;
如何像 MDI 应用程序一样约束 Mainform 中的子表单,但又不会令人头疼! (注意:此页面上的回复帮助我完成了这项工作,所以这就是我在这里发布我的解决方案的原因)
private
{ Private declarations }
StickyAt: Word;
procedure WMWINDOWPOSCHANGING(Var Msg: TWMWINDOWPOSCHANGING); Message M_WINDOWPOSCHANGING;
Procedure WMGetMinMaxInfo(Var msg: TWMGetMinMaxInfo); message WM_GETMINMAXINFO;
稍后...
procedure TForm2.WMWINDOWPOSCHANGING(var Msg: TWMWINDOWPOSCHANGING);
var
A, B: Integer;
iFrameSize: Integer;
iCaptionHeight: Integer;
iMenuHeight: Integer;
begin
iFrameSize := GetSystemMetrics(SM_CYFIXEDFRAME);
iCaptionHeight := GetSystemMetrics(SM_CYCAPTION);
iMenuHeight := GetSystemMetrics(SM_CYMENU);
// inside the Mainform client area
A := Application.MainForm.Left + iFrameSize;
B := Application.MainForm.Top + iFrameSize + iCaptionHeight + iMenuHeight;
with Msg.WindowPos^ do
begin
if x <= A + StickyAt then
x := A;
if x + cx >= A + Application.MainForm.ClientWidth - StickyAt then
x := (A + Application.MainForm.ClientWidth) - cx + 1;
if y <= B + StickyAt then
y := B;
if y + cy >= B + Application.MainForm.ClientHeight - StickyAt then
y := (B + Application.MainForm.ClientHeight) - cy + 1;
end;
end;
还有更多...
Procedure TForm2.WMGetMinMaxInfo(Var msg: TWMGetMinMaxInfo);
var
iFrameSize: Integer;
iCaptionHeight: Integer;
iMenuHeight: Integer;
Begin
inherited;
iFrameSize := GetSystemMetrics(SM_CYFIXEDFRAME);
iCaptionHeight := GetSystemMetrics(SM_CYCAPTION);
iMenuHeight := GetSystemMetrics(SM_CYMENU);
With msg.MinMaxInfo^.ptMaxPosition Do
begin
// position of top when maximised
X := Application.MainForm.Left + iFrameSize + 1;
Y := Application.MainForm.Top + iFrameSize + iCaptionHeight + iMenuHeight + 1;
end;
With msg.MinMaxInfo^.ptMaxSize Do
Begin
// width and height when maximized
X := Application.MainForm.ClientWidth;
Y := Application.MainForm.ClientHeight;
End;
With msg.MinMaxInfo^.ptMaxTrackSize Do
Begin
// maximum size when maximised
X := Application.MainForm.ClientWidth;
Y := Application.MainForm.ClientHeight;
End;
// to do: minimum size (maybe)
End;
就我而言,唯一可行的解决方案是:
procedure TFormHelper.FullScreenMode;
begin
BorderStyle := bsNone;
ShowWindowAsync(Handle, SW_MAXIMIZE);
end;
您需要确保表单位置为 poDefaultPosOnly。
Form1.Position := poDefaultPosOnly;
Form1.FormStyle := fsStayOnTop;
Form1.BorderStyle := bsNone;
Form1.Left := 0;
Form1.Top := 0;
Form1.Width := Screen.Width;
Form1.Height := Screen.Height;
经过测试并可在 Win7 x64 上运行。
尝试:
Align = alClient
FormStyle = fsStayOnTop
这始终与主显示器对齐;
嗯。看着这些回复,我似乎记得大约 8 年前我编写游戏代码时处理过这个问题。为了使调试更容易,我使用普通 Delphi 表单的设备上下文作为全屏显示的源。
重点是,DirectX 能够全屏运行任何设备上下文 - 包括由表单分配的设备上下文。
因此,要为应用程序提供“真正的”全屏功能,请查找 Delphi 的 DirectX 库,它可能会包含您开箱即用所需的内容。
以下是进入全屏和退出全屏的两个按钮单击事件:
procedure TForm1.GoFullScreen(Sender: TObject);
begin
BorderStyle := bsNone;
WindowState := wsMaximized;
end;
procedure TForm1.ExitFullScreen(Sender: TObject);
begin
BorderStyle := bsSizable;
WindowState := wsNormal;
end;
对于那些希望在 FireMonkey (FMX) 中做同样事情的人。更改
BorderStyle
和 WindowState
的 VCL 方法在 FMX 中会起作用,但正确的方法是在 FMX 中使用表单上的 FullScreen
属性:
procedure TForm1.GoFullScreen(Sender: TObject);
begin
FullScreen := True;
end;
procedure TForm1.ExitFullScreen(Sender: TObject);
begin
FullScreen := False;
end;