How to change the form's buttons (minimize, maximize and close)

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How to change the form's buttons (minimize, maximize and close)

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#1 by (2 votes)

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I have a project in Delphi 2010 where I would like to change the icons for the Minimize , Maximize , Close which are represented in the image below:

The icons I want to use have been created by me, so I do not want to change them by options that already come with Delphi , is there any way to do it, besides creating% no Panel with Form with the buttons and passing align to top ?

If anyone can contribute anything thank you.

delphi icons delphi-2010

asked by anonymous 25.10.2016 / 12:43

1 answer

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score 2 · Accepted Answer

If you can not edit the Style using BitmapStyleDesigner , there is a (Technical Arrangement) way to do it.

You must add TPanel with Height of +/- 32 (it is at your discretion) with Align = alTop .

In this Panel you will add the buttons you want (I recommend TSpeedButton) with Align = alRight , placing the always arranged buttons on the Right if you hide some or resize the window they will automatically aligns, originals.

Now set the BordeStyle of the Form to bsNone .

For the close button use Close

For the Minimize Button, use Application.Minimize

For the Restore / Minimize:

  if (Nome_Form.WindowState = wsMaximized) then
  begin
    Nome_Form.WindowState := wsNormal;
    {altere a imagem do botão aqui para a que desejar}
  end
  else
  begin
    Nome_Form.WindowState := wsMaximized;
    {altere a imagem do botão aqui para a que desejar}
  end;

Now just add the additional buttons you want,

Work, but if it is the last option you will notice that the result is TOP.

Edit 01: Moving the Form:

In the Panel's OnMouseDown Event (which is now its Title bar):

begin
  if (Button = mbLeft) then
  begin
    ReleaseCapture;
    Perform(WM_SYSCOMMAND,$F012,0);
  end;

Edit 02: Resizing the Form:

Declare in Private: procedure WMNCHitTest(var Msg: TWMNCHitTest); message WM_NCHITTEST;

procedure Nome_Form.WMNCHitTest(var Msg: TWMNCHitTest);
var
  ScreenPt: TPoint;
begin
  //inherited;
  ScreenPt := ScreenToClient(Point(Msg.Xpos, Msg.Ypos));
  if (ScreenPt.x < 5) then
    Msg.Result := HTLEFT
    // top side
  else if (ScreenPt.y < 5) then
    Msg.Result := HTTOP
    // right side
  else if (ScreenPt.x >= Width - 5) then
    Msg.Result := HTRIGHT
    // bottom side
  else if (ScreenPt.y >= Height - 5) then
    Msg.Result := HTBOTTOM
    // top left corner
  else if (ScreenPt.x < 5) and (ScreenPt.y < 5) then
    Msg.Result := HTTOPLEFT
    // bottom left corner
  else if (ScreenPt.x < 5) and (ScreenPt.y >= Height - 5) then
    Msg.Result := HTBOTTOMLEFT
    // top right corner
  else if (ScreenPt.x >= Width - 5) and (ScreenPt.y < 5) then
    Msg.Result := HTTOPRIGHT
    // bottom right corner
  else if (ScreenPt.x >= Width - 5) and (ScreenPt.y >= Height - 5) then
    Msg.Result := HTBOTTOMRIGHT
end;

Note: The procedure statement that resizes must be the same, different from the procedure body, as if it were sending SendMessage to the Api of Windows!

That way even the Mouse Cursor will change shape as you approach the form border!

Edit 03: New Container

Now as the Form has no border, we need to create a new Container for the components that need to be aligned using for example the alClient, alLeft etc ...

No OnResize of Form:

  Panel_Principal.Left   := 5;
  Panel_Principal.Top    := 5; {observar o outro panel que é a barra de Título}
  Panel_Principal.Width  := Nome_Form.Width - 10;
  Panel_Principal.Height := Nome_Form.Height - 10;

In this way the Main_Panel and the Form will create the effect of the border.

Important: To not have this hassle all in all forms, you should use this as a Model and the others use as Inheritance. However, for each new form in OnResize you should program again the same OnResize .