diff --git a/src/GLib/GLib.jl b/src/GLib/GLib.jl
index 951e68e1..f1a9c369 100644
--- a/src/GLib/GLib.jl
+++ b/src/GLib/GLib.jl
@@ -20,7 +20,7 @@ export Maybe
 export GList, GSList, glist_iter, _GSList, _GList, GError, GVariant, GType, GBoxed
 export GObject, GInitiallyUnowned, GInterface, GTypeInterface, _GTypeInterface, GParam, GTypeInstance
 export GByteArray, GHashTable, GPtrArray
-export g_timeout_add, g_idle_add, @idle_add, @guarded, g_source_remove
+export g_timeout_add, g_idle_add, @idle_add, @guarded, g_source_remove, cancel
 export cfunction_, on_notify, signalnames, signal_return_type, signal_argument_types
 export gobject_ref, signal_connect, signal_emit, signal_handler_disconnect
 export signal_handler_block, signal_handler_unblock
diff --git a/src/GLib/gerror.jl b/src/GLib/gerror.jl
index 06da0f65..5e10dca3 100644
--- a/src/GLib/gerror.jl
+++ b/src/GLib/gerror.jl
@@ -24,7 +24,7 @@ struct GErrorException <: Exception
     message::String
 end
 
-GErrorException(err::GError) = GErrorException(err.domain, err.code, bytestring(err.message))
+GErrorException(err::GError) = GErrorException(err.domain, err.code, message(err))
 
 function check_err(err::Base.RefValue{Ptr{GError}})
     if err[] != C_NULL
diff --git a/src/basic_exports.jl b/src/basic_exports.jl
index accb473c..edd385ab 100644
--- a/src/basic_exports.jl
+++ b/src/basic_exports.jl
@@ -23,13 +23,14 @@ export open_dialog, save_dialog
 export info_dialog, ask_dialog, warn_dialog, error_dialog, input_dialog
 export color_dialog
 export response
+export open_file, save_path, open_path, select_folder, select_folder_path, open_multiple, open_paths, select_multiple_folders, select_multiple_folder_paths
 
 export GListModel, changed, model, selected_string, selected_string!
 
 # GLib-imported event handling
 export signal_connect, signal_handler_disconnect,
     signal_handler_block, signal_handler_unblock, signal_handler_is_connected,
-    signal_emit, g_timeout_add, g_idle_add
+    signal_emit, g_timeout_add, g_idle_add, GCancellable, cancel
 export @guarded, @idle_add
 export start_main_loop, stop_main_loop
 
diff --git a/src/cairo.jl b/src/cairo.jl
index ca134a9e..e531e66f 100644
--- a/src/cairo.jl
+++ b/src/cairo.jl
@@ -16,9 +16,7 @@ function _init_canvas!(widget, w, h)
 end
 
 function _canvas_on_realize(::Ptr, canvas)
-    if canvas.is_sized
-        _canvas_on_resize(da,1,1)
-    end
+    canvas.is_sized && _canvas_on_resize(da,1,1)
     nothing
 end
 
@@ -120,9 +118,7 @@ end
 Return the CairoContext of the `CairoSurface` backing store of a `GtkCanvas`.
 """
 function getgc(c::GtkCanvas)
-    if !isdefined(c,:backcc)
-      error("GtkCanvas not yet initialized.")
-    end
+    isdefined(c,:backcc) || error("GtkCanvas not yet initialized.")
     return c.backcc
 end
 
@@ -132,8 +128,6 @@ end
 Return the image `CairoSurface` backing store for a `GtkCanvas`.
 """
 function cairo_surface(c::GtkCanvas)
-    if !isdefined(c,:back)
-      error("GtkCanvas not yet initialized.")
-    end
+    isdefined(c,:back) || error("GtkCanvas not yet initialized.")
     return c.back
 end
diff --git a/src/deprecated.jl b/src/deprecated.jl
index 791367b3..c524cf60 100644
--- a/src/deprecated.jl
+++ b/src/deprecated.jl
@@ -2,3 +2,5 @@ GtkAdjustment(spinButton::GtkSpinButton) = G_.get_adjustment(spinButton)
 GtkAdjustment(range::GtkRange) = G_.get_adjustment(range)
 GtkAdjustment(scale::GtkScaleButton) = G_.get_adjustment(scale)
 
+setindex!(buffer::GtkEntryBuffer, content::String, ::Type{String}) =
+    G_.set_text(buffer, content, -1)
diff --git a/src/events.jl b/src/events.jl
index 7dd82f09..27f9b4ed 100644
--- a/src/events.jl
+++ b/src/events.jl
@@ -20,7 +20,7 @@ penalty for creating a list of a widget's event controllers.
 Related GTK function: [`gtk_widget_observe_controllers`](https://docs.gtk.org/gtk4/method.Widget.observe_controllers.html))
 """
 function find_controller(w::GtkWidget, ::Type{T}) where T<: GtkEventController
-    list = GListModel(G_.observe_controllers(w))
+    list = observe_controllers(w)
     i=findfirst(c->isa(c,T), list)
     i!==nothing ? list[i] : nothing
 end
diff --git a/src/input.jl b/src/input.jl
index fe7d4714..2156ff24 100644
--- a/src/input.jl
+++ b/src/input.jl
@@ -10,7 +10,7 @@ function GtkEntryBuffer(initial_text = nothing)
     G_.EntryBuffer_new(initial_text, -1)
 end
 
-setindex!(buffer::GtkEntryBuffer, content::String, ::Type{String}) =
+setindex!(buffer::GtkEntryBuffer, content::String) =
     G_.set_text(buffer, content, -1)
 
 complete(completion::GtkEntryCompletion) = G_.complete(completion)
diff --git a/src/layout.jl b/src/layout.jl
index 980e271e..3ef8da68 100644
--- a/src/layout.jl
+++ b/src/layout.jl
@@ -201,9 +201,22 @@ end
 
 ## GtkFrame — A decorative frame and optional label
 
+"""
+    GtkFrame(label=nothing; kwargs...)
+
+Create a `GtkFrame`, a layout widget that can hold a single child widget, with
+an optional string `label`. Keyword arguments allow you to set GObject
+properties.
+"""
 GtkFrame(;kwargs...) = GtkFrame(nothing; kwargs...)
-function GtkFrame(w::GtkWidget; kwargs...)
-    f = GtkFrame(; kwargs...)
+"""
+    GtkFrame(w::GtkWidget, label=nothing; kwargs...)
+
+Create a `GtkFrame` with an optional string `label` and add `w` as its child.
+Keyword arguments allow you to set GObject properties.
+"""
+function GtkFrame(w::GtkWidget, label=nothing; kwargs...)
+    f = GtkFrame(label; kwargs...)
     f[] = w
     f
 end
@@ -269,6 +282,14 @@ function empty!(w::GtkNotebook)
 end
 
 ## GtkOverlay
+
+"""
+    GtkOverlay(w=nothing; kwargs...)
+
+Create a `GtkOverlay`, a layout widget that holds one main child and other
+child "overlay" widgets that are drawn on top of the main child. The main child
+can be set using the argument `w`.
+"""
 function GtkOverlay(w::GtkWidget; kwargs...)
     o = GtkOverlay(; kwargs...)
     o[] = w
diff --git a/src/windows.jl b/src/windows.jl
index dd2ad4e1..9f4e92a9 100644
--- a/src/windows.jl
+++ b/src/windows.jl
@@ -621,17 +621,18 @@ end
 """
     save_path(dlg, resobj)
 
-Get the path selected by the user in a save dialog.
+Get the path selected by the user in a save dialog. An exception will be thrown
+if the user cancelled the operation.
 """
 save_path(dlg, resobj) = _path_finish(Gtk4.G_.save_finish, dlg, resobj)
 
 """
-    open(cb, dlg::GtkFileDialog, parent = nothing, cancellable = nothing)
+    open_file(cb, dlg::GtkFileDialog, parent = nothing, cancellable = nothing)
 
 Open a dialog to open a file. The callback `cb` will be called when the user
 selects a file.
 """
-function Base.open(cb, dlg::GtkFileDialog, parent = nothing, cancellable = nothing)
+function open_file(cb, dlg::GtkFileDialog, parent = nothing, cancellable = nothing)
     G_.open(dlg, parent, cancellable, cb)
 end
 
@@ -682,8 +683,8 @@ open_paths(dlg, resobj) = _path_multiple_finish(Gtk4.G_.open_multiple_finish, dl
 Open a dialog to select multiple folders. The callback `cb` will be called when the user
 is done selecting folders.
 """
-function select_multiple(cb, dlg::GtkFileDialog, parent = nothing, cancellable = nothing)
-    G_.select_multiple(dlg, parent, cancellable, cb)
+function select_multiple_folders(cb, dlg::GtkFileDialog, parent = nothing, cancellable = nothing)
+    G_.select_multiple_folders(dlg, parent, cancellable, cb)
 end
 
 """
diff --git a/test/comboboxtext.jl b/test/comboboxtext.jl
index 03800066..4505e155 100644
--- a/test/comboboxtext.jl
+++ b/test/comboboxtext.jl
@@ -3,7 +3,7 @@ using Gtk4
 @testset "comboboxtext" begin
 
 @testset "populate with push!" begin
-    cbstr = GtkComboBoxText()
+    cbstr = GtkComboBoxText(false)
     push!(cbstr, "1", "abc")
     push!(cbstr, "2", "xyz")
 
diff --git a/test/gdkpixbuf.jl b/test/gdkpixbuf.jl
index 754baecb..5f3a5e41 100644
--- a/test/gdkpixbuf.jl
+++ b/test/gdkpixbuf.jl
@@ -2,11 +2,19 @@ using Test, Gtk4.GdkPixbufLib
 
 @testset "pixbuf" begin
 
-pb=GdkPixbufLib.G_.Pixbuf_new(0,true,8,300,300)
+pb=GdkPixbufLib.G_.Pixbuf_new(0,false,8,300,300)
 @test isa(pb,GdkPixbufLib.GdkPixbuf)
 
 @test 300 == width(pb)
 
+x=fill(GdkPixbufLib.RGB(0xff,0xff,0xff),(3,3))
+pb[1:3,1:3]=x
+@test pb[1,1] == GdkPixbufLib.RGB(0xff,0xff,0xff)
+@test pb[1,3] == GdkPixbufLib.RGB(0xff,0xff,0xff)
+@test pb[1,4] != GdkPixbufLib.RGB(0xff,0xff,0xff)
+@test pb[3,1] == GdkPixbufLib.RGB(0xff,0xff,0xff)
+@test pb[4,1] != GdkPixbufLib.RGB(0xff,0xff,0xff)
+
 end
 
 @testset "Transparent pixbuf" begin
@@ -16,3 +24,4 @@ icon[5:end-5, 3:end-3] .= Ref(GdkPixbufLib.RGBA(0,0,0xff,0x80))
 pb=GdkPixbuf(icon, true)
 @test eltype(pb) == GdkPixbufLib.RGBA
 end
+
diff --git a/test/gui/canvas.jl b/test/gui/canvas.jl
index 13cdbc41..bee5572b 100644
--- a/test/gui/canvas.jl
+++ b/test/gui/canvas.jl
@@ -1,6 +1,6 @@
 using Test, Gtk4, Cairo
 
-@testset "Canvas & AspectFrame" begin
+@testset "Canvas, AspectFrame, and event controllers" begin
 c = GtkCanvas(100,100)
 f = GtkAspectFrame(0.5, 1, 0.5, false)
 f[] = c
@@ -10,10 +10,16 @@ gs = GtkEventControllerScroll(Gtk4.EventControllerScrollFlags_VERTICAL,c)
 gk = GtkEventControllerKey(c)
 ggc = GtkGestureClick(c)
 ggd = GtkGestureDrag(c)
+gsc = GtkShortcutController(c)
 ggz = GtkGestureZoom(c)
 t = Gtk4.find_controller(c,GtkEventControllerMotion)
 @test t==gm
 @test widget(gm) == c
+
+delete!(c, gk)
+t = Gtk4.find_controller(c,GtkEventControllerKey)
+@test t===nothing
+
 drew = Ref(false)
 resized = Ref(false)
 c.draw = function(_)
diff --git a/test/gui/dialogs.jl b/test/gui/dialogs.jl
index c09c5331..b3af6eb2 100644
--- a/test/gui/dialogs.jl
+++ b/test/gui/dialogs.jl
@@ -83,3 +83,77 @@ csvfilter4 = GtkFileFilter("*.csv", "text/csv")
 @test csvfilter4.name == "*.csv"
 end
 
+@testset "New dialogs" begin
+main_window = GtkWindow("New dialog example")
+fd=GtkFileDialog()
+
+c=GCancellable()
+save(fd, main_window, c) do dlg, resobj
+    try
+        x=save_path(dlg, resobj)
+    catch e
+        if !isa(e, Gtk4.GLib.GErrorException)
+            rethrow(e)
+        end
+    end
+end
+sleep(1.0)
+cancel(c)
+
+c=GCancellable()
+open_file(fd, main_window, c) do dlg, resobj
+    try
+        x=open_path(dlg, resobj)
+    catch e
+        if !isa(e, Gtk4.GLib.GErrorException)
+            rethrow(e)
+        end
+    end
+end
+sleep(1.0)
+cancel(c)
+
+c=GCancellable()
+select_folder(fd, main_window, c) do dlg, resobj
+    try
+        x=select_folder_path(dlg, resobj)
+    catch e
+        if !isa(e, Gtk4.GLib.GErrorException)
+            rethrow(e)
+        end
+    end
+end
+sleep(1.0)
+cancel(c)
+
+c=GCancellable()
+open_multiple(fd, main_window, c) do dlg, resobj
+    try
+        x=open_paths(dlg, resobj)
+    catch e
+        if !isa(e, Gtk4.GLib.GErrorException)
+            rethrow(e)
+        end
+    end
+end
+sleep(1.0)
+cancel(c)
+
+c=GCancellable()
+select_multiple_folders(fd, main_window, c) do dlg, resobj
+    try
+        x=select_multiple_folder_paths(dlg, resobj)
+    catch e
+        if !isa(e, Gtk4.GLib.GErrorException)
+            rethrow(e)
+        end
+    end
+end
+sleep(1.0)
+cancel(c)
+
+
+sleep(2.0)
+
+close(main_window)
+end
diff --git a/test/gui/input.jl b/test/gui/input.jl
index bf18c4cb..1530c307 100644
--- a/test/gui/input.jl
+++ b/test/gui/input.jl
@@ -63,6 +63,8 @@ set_gtk_property!(e,:sensitive,false)
 b = GtkEntryBuffer("different")
 buffer(e, b)
 @test e.text == "different"
+b[] = "new text"
+@test e.text == "new text"
 
 @test fraction(e) == 0.0
 fraction(e, 1.0)
diff --git a/test/gui/layout.jl b/test/gui/layout.jl
index b0fbcff1..3b2fce42 100644
--- a/test/gui/layout.jl
+++ b/test/gui/layout.jl
@@ -111,6 +111,8 @@ end
     l4 = GtkLabel("Named #2")
     s["named2"] = l4
     @test s["named2"] == l4
+    delete!(s,s["named2"])
+    empty!(s)
     destroy(w)
 end
 
diff --git a/test/gui/listviews.jl b/test/gui/listviews.jl
index b2d2602f..1cf7896a 100644
--- a/test/gui/listviews.jl
+++ b/test/gui/listviews.jl
@@ -49,6 +49,13 @@ destroy(win)
 
 end
 
+function match(item)
+  label = item.child
+  return startswith(label.label, "widget")
+end
+
+alpha_compare(item1, item2) = isless(item1.child.label, item2.child.label) ? -1 : 1
+
 @testset "ListBox" begin
 win = GtkWindow("ListBox demo with filter")
 box = GtkBox(:v)
@@ -77,6 +84,10 @@ listBox[1] = GtkLabel("widget 2")
 sw[] = listBox
 listBox.vexpand = true
 
+Gtk4.set_filter_func(listBox, nothing)
+Gtk4.set_sort_func(listBox, nothing)
+Gtk4.set_sort_func(listBox, alpha_compare)
+
 # while we're at it, test GtkExpression
 pe = GtkPropertyExpression(GtkWindow, "title")
 rgv=Ref(GLib.GValue())
@@ -122,7 +133,25 @@ listBox[1] = GtkLabel("widget 2")
 sw[] = listBox
 listBox.vexpand = true
 
+Gtk4.set_filter_func(listBox, nothing)
+Gtk4.set_sort_func(listBox, nothing)
+
+Gtk4.set_filter_func(listBox, match)
+Gtk4.set_sort_func(listBox, alpha_compare)
+
 destroy(win)
 
 end
 
+@testset "CustomFilter and CustomSorter" begin
+filt = GtkCustomFilter(match)
+Gtk4.set_filter_func(filt,nothing)
+Gtk4.set_filter_func(filt,match)
+Gtk4.changed(filt)
+
+sorter = GtkCustomSorter(alpha_compare)
+Gtk4.set_sort_func(sorter,nothing)
+Gtk4.set_sort_func(sorter,alpha_compare)
+Gtk4.changed(sorter)
+
+end
diff --git a/test/gui/window.jl b/test/gui/window.jl
index 9358a451..c16868d2 100644
--- a/test/gui/window.jl
+++ b/test/gui/window.jl
@@ -51,6 +51,8 @@ end
     unmaximize(w)
     sleep(1)
     @test !G_.is_maximized(w)
+    ag = GSimpleActionGroup()
+    push!(w, GActionGroup(ag), "window")
     Gtk4.default_size(w, 200, 500)
     @test Gtk4.default_size(w) == (200, 500)
     destroy(w)