add to dialog documentation

docs/src/manual/dialogs.md

@@ -98,7 +98,7 @@ if isdir(dir[])
 end
 ```
 
-### Filters
+### File Filters
 Filters can be used to limit the type of files that the user can pick. Filters 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"`.
@@ -108,3 +108,54 @@ The generic specification of a filter is
 GtkFileFilter(pattern = "", mimetype = "")
 ```
 A human-readable name can optionally be provided using a keyword argument.
+
+## Custom dialogs
+
+You can define your own type of dialog by creating a window that closes and calls a function when a button is pressed.
+For example:
+```julia
+using Gtk4
+
+function callback_and_destroy(dlg, callback, args...)  # calls the callback and destroys the dialog
+    callback(args...)
+    Gtk4.transient_for(dlg, nothing)
+    destroy(dlg)
+end
+
+function custom_dialog(callback::Function, message::AbstractString, parent::GtkWindow)
+    dlg = GtkWindow(; modal = true)
+    box = GtkBox(:v)
+    push!(box, GtkLabel(message))  # or could put other widgets here
+    boxb = GtkBox(:h)  # box with buttons for the bottom of the dialog
+    push!(box, boxb)
+    choice1 = GtkButton("Choice 1"; hexpand = true)
+    choice2 = GtkButton("Choice 2"; hexpand = true)
+    choice3 = GtkButton("Choice 3"; hexpand = true)
+    push!(boxb, choice1)
+    push!(boxb, choice2)
+    push!(boxb, choice3)
+    Gtk4.transient_for(dlg, parent)
+    dlg[] = box
+
+    signal_connect(choice1, "clicked") do b
+        callback_and_destroy(dlg, callback, 1)
+    end
+
+    signal_connect(choice2, "clicked") do b
+        callback_and_destroy(dlg, callback, 2)
+    end
+
+    signal_connect(choice3, "clicked") do b
+        callback_and_destroy(dlg, callback, 3)
+    end
+
+    show(dlg)
+
+    return dlg
+end
+
+custom_dialog("choice", GtkWindow("parent")) do val
+    println("Your choice was $val")
+end
+```
+

src/windows.jl

@@ -307,12 +307,13 @@ window by default.
 
 Keyword arguments:
 - `timeout = -1` to set a time in seconds after which the dialog will close and `false` will be returned. Disabled if negative.
+- `modal = true` sets whether the dialog is modal (i.e. stays on top of its parent window)
 """
-function input_dialog(message::AbstractString, entry_default::AbstractString, parent = nothing; timeout = -1)
+function input_dialog(message::AbstractString, entry_default::AbstractString, parent = nothing; timeout = -1, modal = true)
     res = Ref{String}("")
     c = Condition()
 
-    input_dialog(message, entry_default, parent; timeout) do res_
+    input_dialog(message, entry_default, parent; timeout, modal) do res_
         res[] = res_
         notify(c)
     end
@@ -327,7 +328,7 @@ function _callback_and_destroy(dlg, callback, txt)
 end
 
 function input_dialog(callback::Function, message::AbstractString, entry_default::AbstractString,
-                      parent = nothing; timeout = -1)
+                      parent = nothing; timeout = -1, modal = true)
     dlg = GtkWindow()
     box = GtkBox(:v)
     push!(box, GtkLabel(message))
@@ -341,7 +342,7 @@ function input_dialog(callback::Function, message::AbstractString, entry_default
     cancel = GtkButton("Cancel"; hexpand = true)
     push!(boxb, cancel)
     push!(boxb, accept)
-    isnothing(parent) || (G_.set_transient_for(dlg, parent); G_.set_modal(dlg, true))
+    isnothing(parent) || (G_.set_transient_for(dlg, parent); G_.set_modal(dlg, modal))
     dlg[] = box
 
     signal_connect(cancel, "clicked") do b