rozanek
asked on
Transparently Form?
How to make the Form1 transparent?
ASKER CERTIFIED SOLUTION
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Bryan, your code doesn't make the form transparent, it makes a BIG HOLE IN IT!
/// John
/// John
John's right y'all :)))
Cheers,
Viktor
Cheers,
Viktor
But this will make the border disappear as well:
procedure TForm1.FormCreate(Sender: TObject);
begin
Form1.Canvas.Brush.Style := bsClear;
Form1.Borderstyle:=bsNone; //Yup!, Gone
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Form1.Canvas.Brush.Style := bsClear;
Form1.Borderstyle:=bsNone;
end;
C'mon Thaddy Bear :)
I guess I was confused as to what you wanted. Sorry :).
Use this to toggle transparent/normal
Drop a panel and 2 buttons to the form and use this:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ExtCtrls, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Panel1: TPanel;
Button2: TButton;
procedure FormDestroy(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure FormResize(Sender: TObject);
private
{ Private declarations }
procedure DoVisible;
procedure DoInvisible;
public
{ Public declarations }
end;
var
Form1: TForm1;
FullRgn, ClientRgn, CtlRgn : THandle;
implementation
{$R *.DFM}
procedure TForm1.DoInvisible;
var
AControl : TControl;
A, Margin, X, Y, CtlX, CtlY : Integer;
begin
Margin := ( Width - ClientWidth ) div 2;
//First, get form region
FullRgn := CreateRectRgn(0, 0, Width, Height);
//Find client area region
X := Margin;
Y := Height - ClientHeight - Margin;
ClientRgn := CreateRectRgn( X, Y, X + ClientWidth, Y + ClientHeight );
//'Mask' out all but non-client areas
CombineRgn( FullRgn, FullRgn, ClientRgn, RGN_DIFF );
//Now, walk through all the controls on the form and 'OR' them
// into the existing Full region.
for A := 0 to ControlCount - 1 do begin
AControl := Controls[A];
if ( AControl is TWinControl ) or ( AControl is TGraphicControl )
then with AControl do begin
if Visible then begin
CtlX := X + Left;
CtlY := Y + Top;
CtlRgn := CreateRectRgn( CtlX, CtlY, CtlX + Width, CtlY + Height );
CombineRgn( FullRgn, FullRgn, CtlRgn, RGN_OR );
end;
end;
end;
//When the region is all ready, put it into effect:
SetWindowRgn(Handle, FullRgn, TRUE);
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
//Clean up the regions we created
DeleteObject(ClientRgn);
DeleteObject(FullRgn);
DeleteObject(CtlRgn);
end;
procedure TForm1.DoVisible;
begin
//To restore complete visibility:
FullRgn := CreateRectRgn(0, 0, Width, Height);
CombineRgn(FullRgn, FullRgn, FullRgn, RGN_COPY);
SetWindowRgn(Handle, FullRgn, TRUE);
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
//We start out as a transparent form....
DoInvisible;
Button1.Caption := 'Hide Form';
end;
procedure TForm1.Button1Click(Sender : TObject);
begin
//This button just toggles between transparent and not trans..
if Button1.Caption = 'Show Form' then begin
DoVisible;
Button1.Caption := 'Hide Form';
end
else begin
DoInvisible;
Button1.Caption := 'Show Form';
end;
end;
procedure TForm1.Button2Click(Sender : TObject);
begin
Application.Terminate;
end;
procedure TForm1.FormResize(Sender: TObject);
begin
//Need to address the transparency if the form gets re-sized.
//Also, note that Form1 scroll bars are set to VISIBLE/FALSE.
//I did that to save a little coding here....
if Button1.Caption = 'Show Form' then
DoInvisible
else
DoVisible;
end;
end.
( don't forget to double click on the object inspector events for buttonclick and form create, resize and destroy )
bryan
Drop a panel and 2 buttons to the form and use this:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ExtCtrls, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Panel1: TPanel;
Button2: TButton;
procedure FormDestroy(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure FormResize(Sender: TObject);
private
{ Private declarations }
procedure DoVisible;
procedure DoInvisible;
public
{ Public declarations }
end;
var
Form1: TForm1;
FullRgn, ClientRgn, CtlRgn : THandle;
implementation
{$R *.DFM}
procedure TForm1.DoInvisible;
var
AControl : TControl;
A, Margin, X, Y, CtlX, CtlY : Integer;
begin
Margin := ( Width - ClientWidth ) div 2;
//First, get form region
FullRgn := CreateRectRgn(0, 0, Width, Height);
//Find client area region
X := Margin;
Y := Height - ClientHeight - Margin;
ClientRgn := CreateRectRgn( X, Y, X + ClientWidth, Y + ClientHeight );
//'Mask' out all but non-client areas
CombineRgn( FullRgn, FullRgn, ClientRgn, RGN_DIFF );
//Now, walk through all the controls on the form and 'OR' them
// into the existing Full region.
for A := 0 to ControlCount - 1 do begin
AControl := Controls[A];
if ( AControl is TWinControl ) or ( AControl is TGraphicControl )
then with AControl do begin
if Visible then begin
CtlX := X + Left;
CtlY := Y + Top;
CtlRgn := CreateRectRgn( CtlX, CtlY, CtlX + Width, CtlY + Height );
CombineRgn( FullRgn, FullRgn, CtlRgn, RGN_OR );
end;
end;
end;
//When the region is all ready, put it into effect:
SetWindowRgn(Handle, FullRgn, TRUE);
end;
procedure TForm1.FormDestroy(Sender:
begin
//Clean up the regions we created
DeleteObject(ClientRgn);
DeleteObject(FullRgn);
DeleteObject(CtlRgn);
end;
procedure TForm1.DoVisible;
begin
//To restore complete visibility:
FullRgn := CreateRectRgn(0, 0, Width, Height);
CombineRgn(FullRgn, FullRgn, FullRgn, RGN_COPY);
SetWindowRgn(Handle, FullRgn, TRUE);
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
//We start out as a transparent form....
DoInvisible;
Button1.Caption := 'Hide Form';
end;
procedure TForm1.Button1Click(Sender
begin
//This button just toggles between transparent and not trans..
if Button1.Caption = 'Show Form' then begin
DoVisible;
Button1.Caption := 'Hide Form';
end
else begin
DoInvisible;
Button1.Caption := 'Show Form';
end;
end;
procedure TForm1.Button2Click(Sender
begin
Application.Terminate;
end;
procedure TForm1.FormResize(Sender: TObject);
begin
//Need to address the transparency if the form gets re-sized.
//Also, note that Form1 scroll bars are set to VISIBLE/FALSE.
//I did that to save a little coding here....
if Button1.Caption = 'Show Form' then
DoInvisible
else
DoVisible;
end;
end.
( don't forget to double click on the object inspector events for buttonclick and form create, resize and destroy )
bryan
ASKER
Thank you for help, friend.
procedure TForm1.FormCreate(Sender: TObject);
begin
Canvas.Brush.Style := bsClear;
end;
/// John