try to replace the three buttons by tcl vsapi

[littlewhitecloud]

Here I found something intreseting:

It seems that windows put the max, min, restore, close or even help button's glyph in the DWMWindow class.
And there is something from the tcl/tk ttk_vsapi manual page (https://www.tcl.tk/man/tcl9.0/TkCmd/ttk_vsapi.html):

Change the appearance of a ttk::checkbutton(n) to use the Explorer pin part EBP_HEADERPIN.

ttk::style element create pin vsapi EXPLORERBAR 3 {
    {pressed !selected} 3
    {active !selected} 2
    {pressed selected} 6
    {active selected} 5
    {selected} 4
    {} 1
}
ttk::style layout Explorer.Pin {Explorer.Pin.pin -sticky news}
pack [ttk::checkbutton .pin -style Explorer.Pin]

And this program created a checkbutton with a element from the vsapi in the EXPLOREBAR.


So I am thinking we can get the elements from the vsapi in the DWMWindow and let dwm to draw the three buttons.

Sadly, it doesn't work when I wrote down something like this:

ttk::style element create max vsapi DWMWINDOW 29 \
    {disabled 4 pressed 3 active 2 {} 1}
ttk::style layout MaxButton {MaxButton.max -sticky news}
pack [ttk::button .close -style MaxButton]

TODO: make it works