File Dialogs

Gtk.jl supports the GtkFileChooserDialog and the GtkFileChooserNative. It also provides four functions, open_dialog and save_dialog as well as open_dialog_native and save_dialog_native, making this functionality easier to use. The syntax of these four functions are as follows:

open_dialog(title, GtkNullContainer(), String[])
save_dialog(title, GtkNullContainer(), String[])
open_dialog_native(title, GtkNullContainer(), String[])
save_dialog_native(title, GtkNullContainer(), String[])

If you are using these functions in the context of a GUI, you should set the parent to be the top-level window. Otherwise, for standalone usage in scripts, do not set the parent.

The main flexibility comes from the filters, which can be specified as a Tuple or Vector. A filter can be specified as a string, in which case it specifies a globbing pattern, for example "*.png". You can specify multiple match types for a single filter by separating the patterns with a comma, for example "*.png,*.jpg". You can alternatively specify MIME types, or if no specification is provided it defaults to types supported by GdkPixbuf. The generic specification of a filter is

FileFilter(; name = nothing, pattern = "", mimetype = "")

If on the other hand you want to choose a folder instead of a file, set the action to GtkFileChooserAction.SELECT_FOLDER:

dir = open_dialog("Select Dataset Folder", action=GtkFileChooserAction.SELECT_FOLDER)
if isdir(dir)
   # do something with dir
end

Here are some examples:

open_dialog("Pick a file")
open_dialog("Pick some files", select_multiple=true)
open_dialog("Pick a file", Null(), ("*.jl",))
open_dialog("Pick some text files", GtkNullContainer(), ("*.txt,*.csv",), select_multiple=true)
open_dialog("Pick a file", Null(), (FileFilter(mimetype="text/csv"),))
open_dialog("Pick an image file", GtkNullContainer(), ("*.png", "*.jpg", FileFilter("*.png,*.jpg", name="All supported formats")))
open_dialog("Pick an image file", GtkNullContainer(), (FileFilter(name="Supported image formats"),))

save_dialog("Save as...", Null(), (FileFilter("*.png,*.jpg", name="All supported formats"), "*.png", "*.jpg"))