[Bug]: Borderless Krypton Form, Maximized, Top Most = True > Fullscreen does not overlap on task bar.

[pgaraneta]

Describe the bug
In a multi screen setup, having a Borderless Krypton Form, Window state set to Maximized and Top Most = True, does not go fully full screen and does not overlap the task bar.

To Reproduce
Steps to reproduce the behavior:

1. Create project, set form Border style to None.
2. Set window state to Maximized
3. Top most = true
4. Launch.

Expected behavior
Borderless form, after loading should be full screen and overlap the windows task bar.

Desktop (please complete the following information):

• OS: Windows 11 Home 22H2
• Version Windows Feature Experience Pack 1000.22642.1000.0

Additional context
Add any other context about the problem here.

[Smurf-IV]

Does a winform "Go over" the taskbar when FullScreen ??

[pgaraneta]

Yes, borderless windows form, when maximized and set on top, goes over the taskbar.

[Wagnerp]

Might be possible to delve into the winforms repo to see if anything is missing?

[Wagnerp]

@Smurf-IV The property MdiChildrenMinimizedAnchorBottom is also missing from KForm?

[Wagnerp]

Found the code, WinForms repository -> Forms, lines 5105 - 5123

 // Only enforce the minimum size if the form has a border and is a top
        // level form.
        FormBorderStyle borderStyle = FormBorderStyle;
        if (borderStyle != FormBorderStyle.None
            && borderStyle != FormBorderStyle.FixedToolWindow
            && borderStyle != FormBorderStyle.SizableToolWindow
            && ParentInternal is null)
        {
            Size min = SystemInformation.MinWindowTrackSize;
            if (height < min.Height)
            {
                height = min.Height;
            }

            if (width < min.Width)
            {
                width = min.Width;
            }
        }

[Wagnerp]

@pgaraneta & @Smurf-IV, A lot is missing from KForm vs form

KForm

   protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)
        {
            var updatedHeight = height;

            // With the Aero glass appearance we need to reduce height by the top border, 
            // otherwise each time the window is maximized and restored it grows in size
            if (ApplyComposition && (FormBorderStyle != FormBorderStyle.None))
            {
                updatedHeight = height - RealWindowBorders.Top;
            }

            base.SetBoundsCore(x, y, width, updatedHeight, specified);
        }

Form

 [EditorBrowsable(EditorBrowsableState.Advanced)]
    protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)
    {
        if (WindowState != FormWindowState.Normal)
        {
            // See RestoreWindowBoundsIfNecessary for an explanation of this
            // Only restore position when x,y is not -1,-1
            if (x != -1 || y != -1)
            {
                _restoredWindowBoundsSpecified |= (specified & (BoundsSpecified.X | BoundsSpecified.Y));
            }

            _restoredWindowBoundsSpecified |= (specified & (BoundsSpecified.Width | BoundsSpecified.Height));

            if ((specified & BoundsSpecified.X) != 0)
            {
                _restoredWindowBounds.X = x;
            }

            if ((specified & BoundsSpecified.Y) != 0)
            {
                _restoredWindowBounds.Y = y;
            }

            if ((specified & BoundsSpecified.Width) != 0)
            {
                _restoredWindowBounds.Width = width;
                _formStateEx[FormStateExWindowBoundsWidthIsClientSize] = 0;
            }

            if ((specified & BoundsSpecified.Height) != 0)
            {
                _restoredWindowBounds.Height = height;
                _formStateEx[FormStateExWindowBoundsHeightIsClientSize] = 0;
            }
        }

        // Update RestoreBounds
        if ((specified & BoundsSpecified.X) != 0)
        {
            _restoreBounds.X = x;
        }

        if ((specified & BoundsSpecified.Y) != 0)
        {
            _restoreBounds.Y = y;
        }

        if ((specified & BoundsSpecified.Width) != 0 || _restoreBounds.Width == -1)
        {
            _restoreBounds.Width = width;
        }

        if ((specified & BoundsSpecified.Height) != 0 || _restoreBounds.Height == -1)
        {
            _restoreBounds.Height = height;
        }

        // Enforce maximum size...
        if (WindowState == FormWindowState.Normal && (Height != height || Width != width))
        {
            Size max = SystemInformation.MaxWindowTrackSize;
            if (height > max.Height)
            {
                height = max.Height;
            }

            if (width > max.Width)
            {
                width = max.Width;
            }
        }

        // Only enforce the minimum size if the form has a border and is a top
        // level form.
        FormBorderStyle borderStyle = FormBorderStyle;
        if (borderStyle != FormBorderStyle.None
            && borderStyle != FormBorderStyle.FixedToolWindow
            && borderStyle != FormBorderStyle.SizableToolWindow
            && ParentInternal is null)
        {
            Size min = SystemInformation.MinWindowTrackSize;
            if (height < min.Height)
            {
                height = min.Height;
            }

            if (width < min.Width)
            {
                width = min.Width;
            }
        }

        base.SetBoundsCore(x, y, width, height, specified);
    }

[Smurf-IV]

Still confused by this statement:

@pgaraneta & @Smurf-IV, A lot is missing from KForm vs form

Because the KForm overrides, and then calls the base class ????
So it will go into the Form version anyway !

[Wagnerp]

@Smurf-IV Using today's alpha (debug), it seems to not work anymore?

[Smurf-IV]

@Wagnerp Should this be fixed and merged back into V80 ?
Also I noticed that once one of those buttons has been pressed then it will not go back into "FullScreen" - tested on Win 10

[Wagnerp]

@Wagnerp Should this be fixed and merged back into V80 ? Also I noticed that once one of those buttons has been pressed then it will not go back into "FullScreen" - tested on Win 10

@Smurf-IV If it's going to be a simple fix then yes. Trying to avoid the 'merge madness' that happened between V70 & V80 :)