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+# Dialog System
+
+Author: vanntile
+
+The dialog system used for dialog-type widgets is made out of the classes
+defined in the following header files (each explained later on):
+
+- dialog-container.h
+- dialog-multipaned.h
+- dialog-notebook.h
+- dialog-window.h
+- dialog-base.h
+
+This is a Gtk::Notebook based dialog manager with a GIMP style multipane.
+Dialogs can live only inside DialogNotebooks, as pages in the inner
+Gtk::Notebook, with their own tabs. A DialogNotebook itself is one of the
+children of a DialogMultipaned. There can be several levels of DialogMultipaned,
+but the top parent is a DialogContainer, which manages the existence of such
+dialogs.
+
+DialogMultipaned is a paned-type container which supports resizing the children
+by dragging the separator "handle" widgets. More than this, it supports the
+addition of new children (in DialogNotebook) by drag-and-dropping them at the
+extremeties of a multipane, where you can find dropzones (left and right for
+horizontal ones, or top and bottom for vertical ones).
+
+Dialogs can also live independently in their own DialogWindow. In this floating
+state, they track the last active window, while in the attached (docked) state,
+they track the InkscapeWindow they are in. You can drag tabs from DialogNotebook
+to move a DialogBase (or child class instance) between windows. In Wayland,
+if you drag the tab to an invalid position, it will create automatically a
+DialogWindow to live in.
+
+DialogContainers are instantiated with a horizontal DialogMultipaned.
+
+## Initialisation
+
+The initial DialogContainer is created inside a DesktopWidget, then inserting
+toolbars and an empty vertical DialogMultipaned where new dialogs will be added.
+
+## Adding a new dialog
+
+In order to add a new dialog to a window, you have to call the method
+`new_dialog(const Glib::ustring& dialog_type)` on the container inside
+the desktop of the window. Allowed dialog types can be found in the
+dialog-container.cpp file.