[gtk/docs-gtk-org] gtk3: Add widget gallery

[Emmanuele Bassi <ebassi src gnome org>]

commit 0f25a41db6881a07b5a9929303d1e86e2b00daf0
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Oct 4 16:29:59 2021 +0100

    gtk3: Add widget gallery

 gtk3/gtk/gtk3.toml.in    |  1 +
 gtk3/gtk/meson.build     |  1 +
 gtk3/gtk/visual_index.md | 78 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 80 insertions(+)
---
diff --git a/gtk3/gtk/gtk3.toml.in b/gtk3/gtk/gtk3.toml.in
index ccaaa36954..539d970035 100644
--- a/gtk3/gtk/gtk3.toml.in
+++ b/gtk3/gtk/gtk3.toml.in
@@ -57,6 +57,7 @@ content_files = [
   "treeview-tutorial.md",
   "css-overview.md",
   "css-properties.md",
+  "visual_index.md",
 
   "x11.md",
   "windows.md",
diff --git a/gtk3/gtk/meson.build b/gtk3/gtk/meson.build
index f0d34b3e1f..ba9c0ae7de 100644
--- a/gtk3/gtk/meson.build
+++ b/gtk3/gtk/meson.build
@@ -17,6 +17,7 @@ expand_content_files = [
   'text-widget-overview.md',
   'tree-widget-overview.md',
   'treeview-tutorial.md',
+  'visual_index.md',
   'wayland.md',
   'windows.md',
   'x11.md',
diff --git a/gtk3/gtk/visual_index.md b/gtk3/gtk/visual_index.md
new file mode 100644
index 0000000000..3b60b7b041
--- /dev/null
+++ b/gtk3/gtk/visual_index.md
@@ -0,0 +1,78 @@
+Title: Widget Gallery
+
+<style>p { display: flex; flex-flow: row wrap; }</style>
+
+## Display Widgets
+
+[![label](label.png)](class.Label.html)
+[![accel label](accel-label.png)](class.AccelLabel.html)
+[![spinner](spinner.png)](class.Spinner.html)
+[![statusbar](statusbar.png)](class.Statusbar.html)
+[![levelbar](levelbar.png)](class.LevelBar.html)
+[![progressbar](progressbar.png)](class.ProgressBar.html)
+[![infobar](info-bar.png)](class.InfoBar.html)
+[![scrollbar](scrollbar.png)](class.Scrollbar.html)
+[![image](image.png)](class.Image.html)
+[![separator](separator.png)](class.Separator.html)
+[![textview](multiline-text.png)](class.TextView.html)
+[![scale](scales.png)](class.Scale.html)
+[![glarea](glarea.png)](class.GLArea.html)
+
+## Buttons
+
+[![button](button.png)](class.Button.html)
+[![checkbutton](check-button.png)](class.CheckButton.html)
+[![togglebutton](toggle-button.png)](class.ToggleButton.html)
+[![linkbutton](link-button.png)](class.LinkButton.html)
+[![menubutton](menu-button.png)](class.MenuButton.html)
+[![lockbutton](lockbutton.png)](class.LockButton.html)
+[![spinbutton](spinbutton.png)](class.SpinButton.html)
+[![colorbutton](color-button.png)](class.ColorButton.html)
+[![switch](switch.png)](class.Switch.html)
+[![combobox](combo-box.png)](class.ComboBox.html)
+[![comboboxtext](combo-box-text.png)](class.ComboBoxText.html)
+[![fontbutton](font-button.png)](class.FontButton.html)
+[![appchooserbutton](appchooserbutton.png)](class.AppChooserButton.html)
+[![radiobutton](radio-group.png)](class.RadioButton.html)
+[![filechooserbutton](file-button.png)](class.FileChooserButton.html)
+[![volumebutton](volumebutton.png)](class.VolumeButton.html)
+
+## Entries
+
+[![entry](entry.png)](class.Entry.html)
+[![searchentry](search-entry.png)](class.SearchEntry.html)
+
+## Containers
+
+[![scrolledwindow](scrolledwindow.png)](class.ScrolledWindow.html)
+[![headerbar](headerbar.png)](class.HeaderBar.html)
+[![searchbar](search-bar.png)](class.SearchBar.html)
+[![actionbar](action-bar.png)](class.ActionBar.html)
+[![listbox](list-box.png)](class.ListBox.html)
+[![flowbox](flow-box.png)](class.FlowBox.html)
+[![stack](stack.png)](class.Stack.html)
+[![stackswitcher](stackswitcher.png)](class.StackSwitcher.html)
+[![stacksidebar](sidebar.png)](class.StackSidebar.html)
+[![treeview](list-and-tree.png)](class.TreeView.html)
+[![iconview](icon-view.png)](class.IconView.html)
+[![notebook](notebook.png)](class.Notebook.html)
+[![frame](frame.png)](class.Frame.html)
+[![panes](panes.png)](class.Paned.html)
+[![menubar](menubar.png)](class.MenuBar.html)
+[![toolbar](toolbar.png)](class.ToolBar.html)
+[![toolpalette](toolpalette.png)](class.ToolPalette.html)
+[![placesidebar](placessidebar.png)](class.PlacesSidebar.html)
+
+## Windows
+
+[![window](window.png)](class.Window.html)
+[![messagedialog](messagedialog.png)](class.MessageDialog.html)
+[![aboutdialog](aboutdialog.png)](class.AboutDialog.html)
+[![assistant](assistant.png)](class.Assistant.html)
+[![colorchooser](colorchooser.png)](class.ColorChooserDialog.html)
+[![filechooser](filechooser.png)](class.FileChooserDialog.html)
+[![recentchooser](recentchooserdialog.png)](class.RecentChooserDialog.html)
+[![fontchooser](fontchooser.png)](class.FontChooserDialog.html)
+[![appchooserdialog](appchooserdialog.png)](class.AppChooserDialog.html)
+[![pagesetupdialog](pagesetupdialog.png)](class.PageSetupUnixDialog.html)
+[![printdialog](printdialog.png)](class.PrintUnixDialog.html)