gtkrc

[asctime]

For performance reasons it is best to avoid use of the wimp engine. Here is a suggested gtkrc:

# Very important for gnome apps like evolution to find their icons
#gtk-icon-theme-name = "gnome"
gtk-icon-theme-name = "Tango"
#gtk-theme-name = "Adwaita"
gtk-theme-name = "Glide"

# Font and printing-related settings (GtkPrint):
# see http://bbs.archlinux.org/viewtopic.php?pid=693878#p693878
#     http://library.gnome.org/devel/gtk/2.17/GtkSettings.html
# should match settings in ~/.Xdefaults
#gtk-font-name = "Cantarell 11"
#gtk-font-name = "Tahoma 9"
gtk-font-name = "Arial 9"
gtk-xft-dpi       = 96
# These settings are X11 only:
#gtk-xft-dpi       = 120
#gtk-xft-antialias = 1
#gtk-xft-hinting   = 1
#gtk-xft-hintstyle = hintfull
#gtk-xft-hintstyle = hintslight
#gtk-xft-rgba      = rgb
# breaks printing under windows:
#gtk-print-backends = lpr,file
#gtk-print-preview-command = evince

gtk-icon-sizes = "gtk-menu=12,12:gtk-small-toolbar=14,14:gtk-large-toolbar=20,20:gtk-dnd=32,32"
# toolbars
gtk-toolbar-style = GTK_TOOLBAR_BOTH_HORIZ
gtk-toolbar-icon-size = GTK_ICON_SIZE_SMALL_TOOLBAR

# disable images in buttons. i've only seen ugly delphi apps use this feature.
gtk-button-images = 0

# enable/disable images in menus. most "stock" microsoft apps don't use these, except sparingly.
# the office apps use them heavily, though.
gtk-menu-images = 1

# use the win32 button ordering instead of the GNOME HIG one, where applicable
gtk-alternative-button-order = 0

# hide mnemonic underlines until the Alt key is pressed
gtk-auto-mnemonics = 0

style "msw-default"
{
  GtkWidget::interior-focus = 0
  GtkOptionMenu::indicator-size = { 9, 5 }
  GtkOptionMenu::indicator-spacing = { 7, 5, 2, 2 }
  GtkSpinButton::shadow-type = in

  # Owen and I disagree that these should be themable
  #GtkUIManager::add-tearoffs = 0
  #GtkComboBox::add-tearoffs = 0

  GtkComboBox::appears-as-list = 1
  GtkComboBox::focus-on-click = 1

  GOComboBox::add_tearoffs = 0

  GtkTreeView::allow-rules = 0
  GtkTreeView::expander-size = 12

  GtkExpander::expander-size = 12

  GtkScrolledWindow::scrollbar_spacing = 1

  GtkSeparatorMenuItem::horizontal-padding = 2
  
  # WIMP gives a native win32 look but is much slower to load and run
  #engine "wimp"
  # Just bold and ugly
  #engine "industrial"
  # A bit gel-bubble for me..
  #engine "clearlooks"
  # This is good..
  engine "glide"
  # A bit retro-Windows95 but efficient..
  #engine "redmond95"
  # Looks like just bad KDE..
  #engine "thinice"
  #engine "industrial"
  {
  }
}
class "*" style "msw-default"

binding "ms-windows-tree-view"
{
  bind "Right" { "expand-collapse-cursor-row" (1,1,0) }
  bind "Left" { "expand-collapse-cursor-row" (1,0,0) }
}
class "GtkTreeView" binding "ms-windows-tree-view"

style "msw-combobox-thickness" = "msw-default"
{
  xthickness = 0
  ythickness = 0
}

widget_class "*TreeView*ComboBox*" style "msw-combobox-thickness"
widget_class "*ComboBox*GtkFrame*" style "msw-combobox-thickness"

Make sure you have MSYS2 gtk-engines package installed, as well as the themes package from asctime.