Adds a child at fixed coordinates in one of the text widget's
windows.
The window must have nonzero size (see
gtk.text_view.TextView.setBorderWindowSize). Note that the child
coordinates are given relative to scrolling. When
placing a child in #GTK_TEXT_WINDOW_WIDGET, scrolling is
irrelevant, the child floats above all scrollable areas. But when
placing a child in one of the scrollable windows (border windows or
text window) it will move with the scrolling as needed.
Adds a child at fixed coordinates in one of the text widget's windows.
The window must have nonzero size (see gtk.text_view.TextView.setBorderWindowSize). Note that the child coordinates are given relative to scrolling. When placing a child in #GTK_TEXT_WINDOW_WIDGET, scrolling is irrelevant, the child floats above all scrollable areas. But when placing a child in one of the scrollable windows (border windows or text window) it will move with the scrolling as needed.