[gtk] filechooserwidget: Pick reasonable default sidebar width

[Timm Bäder <baedert src gnome org>]

commit 1d81a58cf145a9bc413ecff5086ee2df3413a4e3
Author: Timm Bäder <tbaeder redhat com>
Date:   Mon Apr 29 08:40:58 2019 +0200

    filechooserwidget: Pick reasonable default sidebar width
    
    The old default of 148px doesn't work everywhere. Instead, pick a
    default value of -1 and measure() the sidebar widget in the
    filechooserwidget in that case. Other values >= 0 are still handled as
    before.

 gtk/gtkfilechooserwidget.c                        | 8 ++++++++
 gtk/org.gtk.gtk4.Settings.FileChooser.gschema.xml | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkfilechooserwidget.c b/gtk/gtkfilechooserwidget.c
index aa3d9ef54a..3347ede9ca 100644
--- a/gtk/gtkfilechooserwidget.c
+++ b/gtk/gtkfilechooserwidget.c
@@ -3750,6 +3750,14 @@ settings_load (GtkFileChooserWidget *impl)
    */
 
   update_time_renderer_visible (impl);
+  if (sidebar_width < 0)
+    {
+      GtkWidget *sidebar = gtk_paned_get_child1 (GTK_PANED (priv->browse_widgets_hpaned));
+
+      gtk_widget_measure (sidebar, GTK_ORIENTATION_HORIZONTAL, -1,
+                          NULL, &sidebar_width, NULL, NULL);
+    }
+
   gtk_paned_set_position (GTK_PANED (priv->browse_widgets_hpaned), sidebar_width);
 }
 
diff --git a/gtk/org.gtk.gtk4.Settings.FileChooser.gschema.xml 
b/gtk/org.gtk.gtk4.Settings.FileChooser.gschema.xml
index 713597a633..2db786b236 100644
--- a/gtk/org.gtk.gtk4.Settings.FileChooser.gschema.xml
+++ b/gtk/org.gtk.gtk4.Settings.FileChooser.gschema.xml
@@ -128,7 +128,7 @@
       </description>
     </key>
     <key name='sidebar-width' type='i'>
-      <default>148</default>
+      <default>-1</default>
       <summary>Sidebar width</summary>
       <description>
        Width in pixels of the file chooser's places sidebar.