How to prevent window title bar height changes when app is maximized

[jimsweb]

I created a demo app in Delphi 11.1 and when I maximize the window, the title bar height gets re-sized (squeezed). It seems like windows' default behavior. How do I prevent it? I just wanted to keep the same title bar height even after the window is maximized.

Window not maximized:
https://ibb.co/sJpnPSH

Window maximized and title bar height is automatically reduced!! Is there a way to prevent this behavior?
https://ibb.co/Y86p4b9

can someone please advise me - how do we prevent this behavior? I just want to keep the title bar width without getting it changed.

[haentschman]

Hi...8-)

Welcome...:dp:
This forum is in german language...
There are an english Version of the DelphiPraxis. https://en.delphipraxis.net :zwinker:
There you will be better helped...because they understand you. :zwinker:

:wink:

[Sinspin]

Hey,

I don't think that you can prevent that, it's a Windows behaviour.
If you look for a workaround, one solution would be to align your client area to top or the bottom of the form to make sure the gap is not interfering. (Top align is the default behaviour)
Or, you draw the whole content by yourself, inclusive the window title bar.

[Der schöne Günther]

Microsoft Teams is a good example - The electron app paints the title bar entirely by itself, and its size doesn't change, no matter if the window is maximized or not. It looks entirely out of place, I hate it with a passion.

Visual Studio Code is exactly the same, but at least it doesn't look like a children's playground.

[jimsweb]

Zitat:

Zitat von haentschman (Beitrag 1508077)

Hi...8-)

Welcome...:dp:
This forum is in german language...
There are an english Version of the DelphiPraxis. https://en.delphipraxis.net :zwinker:
There you will be better helped...because they understand you. :zwinker:

:wink:

thank you and apologize for posting in German forum..

Unfortunately, it doesn't allow me to login/regiter in the english forum.. it says, i have an active user id /password in German forum.. but when i try to use my existing credentials, it doesn't allow me to login not sure how can i fix this..

[jimsweb]

Zitat:

Zitat von Sinspin (Beitrag 1508078)

Hey,

I don't think that you can prevent that, it's a Windows behavior.
If you look for a workaround, one solution would be to align your client area to top or the bottom of the form to make sure the gap is not interfering. (Top align is the default behavior)
Or, you draw the whole content by yourself, inclusive the window title bar.

I apologize for not following this - how do I manually align client area to maintain the titlebar height? Can you please elaborate?

[haentschman]

You don't need to apologize....:wink:

Zitat:

but when i try to use my existing credentials, it doesn't allow me to login not sure how can i fix this..

:gruebel:
I think, you schould write a PM to @Daniel (Admin) ... he can help you.

:wink:

[Sinspin]

The idea was just to ignore the size change and make sure the client area stays at the same location. But, that idea went too short for been practicable :oops:
However, maybe would it be a better solution to wait until the program gets maximized,
then capture the form location and size, set the WindowState of the form back to normal and set the window location and size by youself.
Then will the title bar not change in size.

[himitsu]

You could catch the WM_MAXIMIZE event and not let your program maximize itself.
Instead, you just set the window coordinates so that it is maximally large, but still has the NORMAL status.

[KodeZwerg]

Three options you have that work for me.
1. Create a borderless window and code your own caption
2. Overwrite the maximize method
3. Use Styles

[jimsweb]

thank you everyone.

I followed your valuable suggestions and somehow made it work.. It just works, however since we are capturing maximize action manually and setting the form size to desktop width and height, i cannot enable or display restore button.

is there a way to show restore button after the form has been expanded to cover the screen?
Is there a way to preven the form not to get expanded beyond task bar area? Currently the form gets expanded and goes under taskbar causing some of the elements to be hidden..

Code:

procedure TForm1.WMSyscommand(var Msg: TWmSysCommand);
begin
  case (Msg.cmdtype and $FFF0) of
    SC_MINIMIZE:
      begin
        // ...
      end;
    SC_RESTORE:
      begin
        // ...
      end;
    SC_MAXIMIZE:
      begin
        ShowMessage('ha Maximize');

        
        Form1.Width := screen.Width;
        Form1.Height := screen.Height;
        
        Form1.Left := 0;
        Form1.Top := 0;

        exit; // use exit if you want to cancel maximize
      end;
  end;
  inherited;

[himitsu]

Zitat:

Delphi-Quellcode:

exit; // use exit if you want to cancel maximize

TWmSysCommand has a result that should be set accordingly.

and from within a form method, NEVER use the global form variable!!!!

[jimsweb]

Zitat:

Zitat von himitsu (Beitrag 1508141)

Zitat:

Delphi-Quellcode:

exit; // use exit if you want to cancel maximize

TWmSysCommand has a result that should be set accordingly.

and from within a form method, NEVER use the global form variable!!!!

thank you - can you please advise on below.

is there a way to show restore button after the form has been expanded to cover the screen?
Is there a way to preven the form not to get expanded beyond task bar area? Currently the form gets expanded and goes under taskbar causing some of the elements to be hidden..

[DeddyH]

Try SystemParameterInfo with SPI_GETWORKAREA as uiAction-Parameter.

Zitat:

Retrieves the size of the work area on the primary display monitor. The work area is the portion of the screen not obscured by the system taskbar or by application desktop toolbars. The pvParam parameter must point to a RECT structure that receives the coordinates of the work area, expressed in physical pixel size. Any DPI virtualization mode of the caller has no effect on this output.
To get the work area of a monitor other than the primary display monitor, call the GetMonitorInfo function.