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[gtk+] Add a manual popover menu example

commit a8cc4787d29c51823f0e07dbb46e7ba6400b04e4
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Oct 23 21:55:20 2014 -0400

    Add a manual popover menu example
    
    Reproduce the testpopover popover manually, by packing model
    buttons into a stack in a popover.

 tests/Makefile.am   |    7 +-
 tests/popover2.ui   |  598 +++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/testpopover.c |   81 +++++--
 3 files changed, 664 insertions(+), 22 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index b8355cf..b54084b 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -9,7 +9,8 @@ AM_CPPFLAGS =                           \
        -I$(top_srcdir)/gdk             \
        $(GTK_DEBUG_FLAGS)              \
        $(GTK_DEP_CFLAGS)               \
-       $(GDK_DEP_CFLAGS)
+       $(GDK_DEP_CFLAGS)               \
+       -pthread
 
 DEPS = \
        $(top_builddir)/gtk/libgtk-3.la
@@ -19,8 +20,12 @@ LDADD = \
        $(top_builddir)/gdk/libgdk-3.la \
        $(GTK_DEP_LIBS)                 \
        $(GDK_DEP_LIBS)                 \
+       -lgmodule-2.0                   \
        -lm
 
+AM_LDFLAGS = -Wl,--export-dynamic -pthread
+
+
 if USE_X11
 testsocket_programs = testsocket testsocket_child
 endif
diff --git a/tests/popover2.ui b/tests/popover2.ui
new file mode 100644
index 0000000..64896bd
--- /dev/null
+++ b/tests/popover2.ui
@@ -0,0 +1,598 @@
+<?xml version="1.0"?>
+<interface>
+  <object class="GtkPopover" id="popover">
+    <child>
+      <object class="GtkStack">
+        <property name="visible">True</property>
+        <property name="homogeneous">False</property>
+        <property name="transition-type">slide-left-right</property>
+        <child>
+          <object class="GtkBox" id="main">
+            <property name="visible">True</property>
+            <property name="orientation">vertical</property>
+            <property name="halign">fill</property>
+            <property name="margin">10</property>
+            <child>
+              <object class="GtkBox">
+                <property name="visible">True</property>
+                <property name="orientation">vertical</property>
+                <property name="margin-start">12</property>
+                <property name="margin-end">12</property>
+                <property name="margin-top">6</property>
+                <property name="margin-bottom">3</property>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="visible">True</property>
+                    <property name="halign">start</property>
+                    <property name="label">Edit</property>
+                    <style>
+                      <class name="separator"/>
+                    </style>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkSeparator">
+                    <property name="visible">True</property>
+                    <property name="orientation">horizontal</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.cut</property>
+                <property name="text">Cut</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.copy</property>
+                <property name="text">Copy</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.paste</property>
+                <property name="text">Paste</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkSeparator">
+                <property name="visible">True</property>
+                <property name="orientation">horizontal</property>
+                <property name="margin-start">12</property>
+                <property name="margin-end">12</property>
+                <property name="margin-top">3</property>
+                <property name="margin-bottom">3</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">action1</property>
+                <property name="text">No action</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action2</property>
+                <property name="action-role">check</property>
+                <property name="text">Toggle</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action2a</property>
+                <property name="action-role">check</property>
+                <property name="text">Another Toggle</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkBox">
+                <property name="visible">True</property>
+                <property name="orientation">vertical</property>
+                <property name="margin-start">12</property>
+                <property name="margin-end">12</property>
+                <property name="margin-top">6</property>
+                <property name="margin-bottom">3</property>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="visible">True</property>
+                    <property name="halign">start</property>
+                    <property name="label">Middle Section</property>
+                    <style>
+                      <class name="separator"/>
+                    </style>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkSeparator">
+                    <property name="visible">True</property>
+                    <property name="orientation">horizontal</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action3</property>
+                <property name="action-target">'three'</property>
+                <property name="action-role">radio</property>
+                <property name="text">Radio 1</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action3</property>
+                <property name="action-target">'four'</property>
+                <property name="action-role">radio</property>
+                <property name="text">Radio 2</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="text">Submenu 1</property>
+                <property name="has-submenu">True</property>
+                <signal name="clicked" handler="open_submenu1"/>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="text">Submenu 2</property>
+                <property name="has-submenu">True</property>
+                <signal name="clicked" handler="open_submenu2"/>
+              </object>
+            </child>
+            <child>
+              <object class="GtkBox">
+                <property name="visible">True</property>
+                <property name="orientation">vertical</property>
+                <property name="margin-start">12</property>
+                <property name="margin-end">12</property>
+                <property name="margin-top">6</property>
+                <property name="margin-bottom">3</property>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="visible">True</property>
+                    <property name="halign">start</property>
+                    <property name="label">End Section</property>
+                    <style>
+                      <class name="separator"/>
+                    </style>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkSeparator">
+                    <property name="visible">True</property>
+                    <property name="orientation">horizontal</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action9</property>
+                <property name="text">Another Item 9</property>
+                <property name="icon">icon9</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action10</property>
+                <property name="text">Another Item 10</property>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="name">main</property>
+          </packing>
+        </child>
+
+        <child>
+          <object class="GtkBox" id="submenu1">
+            <property name="visible">True</property>
+            <property name="orientation">vertical</property>
+            <property name="margin">10</property>
+
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="text">Submenu 1</property>
+                <property name="has-submenu">True</property>
+                <property name="inverted">True</property>
+                <property name="centered">True</property>
+                <signal name="clicked" handler="open_main"/>
+              </object>
+            </child>
+            <child>
+              <object class="GtkBox">
+                <property name="visible">True</property>
+                <property name="orientation">vertical</property>
+                <property name="margin-start">12</property>
+                <property name="margin-end">12</property>
+                <property name="margin-top">6</property>
+                <property name="margin-bottom">3</property>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="visible">True</property>
+                    <property name="halign">start</property>
+                    <property name="label">5555</property>
+                    <style>
+                      <class name="separator"/>
+                    </style>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkSeparator">
+                    <property name="visible">True</property>
+                    <property name="orientation">horizontal</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action5</property>
+                <property name="text">Item 5</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action5</property>
+                <property name="text">Item 5a</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action5</property>
+                <property name="text">Item 5b</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkBox">
+                <property name="visible">True</property>
+                <property name="orientation">horizontal</property>
+                <property name="halign">fill</property>
+                <property name="margin-top">10</property>
+                <style>
+                  <class name="linked"/>
+                </style>
+                <child>
+                  <object class="GtkModelButton">
+                    <property name="visible">True</property>
+                    <property name="text">List</property>
+                    <property name="action-name">top.set-view</property>
+                    <property name="action-target">'list'</property>
+                    <property name="action-role">radio</property>
+                    <property name="iconic">True</property>
+                    <property name="centered">True</property>
+                    <property name="icon">icon-list</property>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkModelButton">
+                    <property name="visible">True</property>
+                    <property name="text">Grid</property>
+                    <property name="action-name">top.set-view</property>
+                    <property name="action-target">'grid'</property>
+                    <property name="action-role">radio</property>
+                    <property name="iconic">True</property>
+                    <property name="centered">True</property>
+                    <property name="icon">icon-grid</property>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                  </packing>
+                </child>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action5</property>
+                <property name="text">Item 5c</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action5</property>
+                <property name="text">Item 5d</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkBox">
+                <property name="visible">True</property>
+                <property name="orientation">vertical</property>
+                <property name="margin-start">12</property>
+                <property name="margin-end">12</property>
+                <property name="margin-top">6</property>
+                <property name="margin-bottom">3</property>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="visible">True</property>
+                    <property name="halign">start</property>
+                    <property name="label">Format</property>
+                    <style>
+                      <class name="separator"/>
+                    </style>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkSeparator">
+                    <property name="visible">True</property>
+                    <property name="orientation">horizontal</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+            <child>
+              <object class="GtkBox">
+                <property name="visible">True</property>
+                <property name="orientation">horizontal</property>
+                <property name="halign">fill</property>
+                <property name="margin-top">10</property>
+                <style>
+                  <class name="linked"/>
+                </style>
+                <child>
+                  <object class="GtkModelButton">
+                    <property name="visible">True</property>
+                    <property name="text">Bold</property>
+                    <property name="action-name">top.bold</property>
+                    <property name="action-role">check</property>
+                    <property name="iconic">True</property>
+                    <property name="centered">True</property>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkModelButton">
+                    <property name="visible">True</property>
+                    <property name="text">Italic</property>
+                    <property name="action-name">top.italic</property>
+                    <property name="action-role">check</property>
+                    <property name="iconic">True</property>
+                    <property name="centered">True</property>
+                    <property name="icon">icon-italic</property>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkModelButton">
+                    <property name="visible">True</property>
+                    <property name="text">Strikethrough</property>
+                    <property name="action-name">top.strikethrough</property>
+                    <property name="action-role">check</property>
+                    <property name="iconic">True</property>
+                    <property name="centered">True</property>
+                    <property name="icon">icon-strikethrough</property>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkModelButton">
+                    <property name="visible">True</property>
+                    <property name="text">Underline</property>
+                    <property name="action-name">top.underline</property>
+                    <property name="action-role">check</property>
+                    <property name="iconic">True</property>
+                    <property name="centered">True</property>
+                    <property name="icon">icon-underline</property>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                  </packing>
+                </child>
+              </object>
+            </child>
+            <child>
+              <object class="GtkBox">
+                <property name="visible">True</property>
+                <property name="orientation">vertical</property>
+                <property name="margin-start">12</property>
+                <property name="margin-end">12</property>
+                <property name="margin-top">6</property>
+                <property name="margin-bottom">3</property>
+                <child>
+                  <object class="GtkLabel">
+                    <property name="visible">True</property>
+                    <property name="halign">start</property>
+                    <property name="label">6666</property>
+                    <style>
+                      <class name="separator"/>
+                    </style>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkSeparator">
+                    <property name="visible">True</property>
+                    <property name="orientation">horizontal</property>
+                  </object>
+                </child>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action6</property>
+                <property name="text">Item 6</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action6</property>
+                <property name="text">Item 6a</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action6</property>
+                <property name="text">Item 6b</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action6</property>
+                <property name="text">Item 6c</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action6</property>
+                <property name="text">Item 6d</property>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="name">submenu1</property>
+          </packing>
+        </child>
+      
+        <child>
+          <object class="GtkBox" id="submenu2">
+            <property name="visible">True</property>
+            <property name="orientation">vertical</property>
+            <property name="margin">10</property>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="text">Submenu 2</property>
+                <property name="has-submenu">True</property>
+                <property name="inverted">True</property>
+                <property name="centered">True</property>
+                <signal name="clicked" handler="open_main"/>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action7</property>
+                <property name="text">Item 7</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="text">Subsubmenu</property>
+                <property name="icon">icon9</property>
+                <property name="has-submenu">True</property>
+                <signal name="clicked" handler="open_subsubmenu"/>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="name">submenu2</property>
+          </packing>
+        </child>
+
+        <child>
+          <object class="GtkBox" id="subsubmenu">
+            <property name="visible">True</property>
+            <property name="orientation">vertical</property>
+            <property name="margin">10</property>
+
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="text">Subsubmenu</property>
+                <property name="has-submenu">True</property>
+                <property name="inverted">True</property>
+                <property name="centered">True</property>
+                <signal name="clicked" handler="open_submenu2"/>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">action8</property>
+                <property name="text">Item 8</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkSeparator">
+                <property name="visible">True</property>
+                <property name="orientation">horizontal</property>
+                <property name="margin-start">12</property>
+                <property name="margin-end">12</property>
+                <property name="margin-top">3</property>
+                <property name="margin-bottom">3</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action9</property>
+                <property name="text">Item 9</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkModelButton">
+                <property name="visible">True</property>
+                <property name="action-name">top.action10</property>
+                <property name="text">Item 10</property>
+              </object>
+            </child>
+
+          </object>
+          <packing>
+            <property name="name">subsubmenu</property>
+          </packing>
+        </child>
+
+      </object>
+    </child>
+  </object>
+  <object class="GThemedIcon" id="icon9">
+    <property name="name">preferences-desktop-font</property>
+  </object>
+  <object class="GThemedIcon" id="icon-grid">
+    <property name="name">view-grid-symbolic</property>
+  </object>
+  <object class="GThemedIcon" id="icon-list">
+    <property name="name">view-list-symbolic</property>
+  </object>
+  <object class="GThemedIcon" id="icon-italic">
+    <property name="name">format-text-italic-symbolic</property>
+  </object>
+  <object class="GThemedIcon" id="icon-strikethrough">
+    <property name="name">format-text-strikethrough-symbolic</property>
+  </object>
+  <object class="GThemedIcon" id="icon-underline">
+    <property name="name">format-text-underline-symbolic</property>
+  </object>
+  <object class="GtkSizeGroup">
+    <property name="mode">horizontal</property>
+    <widgets>
+      <widget name="main"/>
+      <widget name="submenu1"/>
+    </widgets>
+  </object>
+</interface>
diff --git a/tests/testpopover.c b/tests/testpopover.c
index bcae42a..da6ae8c 100644
--- a/tests/testpopover.c
+++ b/tests/testpopover.c
@@ -30,16 +30,53 @@ static GActionEntry entries[] = {
   { "action10", activate, NULL, NULL, NULL }
 };
 
-int main (int argc, char *argv[])
+static void
+open_menu (GtkWidget *button, const gchar *name)
+{
+  GtkWidget *stack;
+  g_print ("open %s\n", name);
+  stack = gtk_widget_get_ancestor (button, GTK_TYPE_STACK);
+  gtk_stack_set_visible_child_name (GTK_STACK (stack), name);
+}
+
+void
+open_main (GtkWidget *button)
+{
+  open_menu (button, "main");
+}
+
+void
+open_submenu1 (GtkWidget *button)
+{
+  open_menu (button, "submenu1");
+}
+
+void
+open_submenu2 (GtkWidget *button)
+{
+  open_menu (button, "submenu2");
+}
+
+void
+open_subsubmenu (GtkWidget *button)
+{
+  open_menu (button, "subsubmenu");
+}
+
+int
+main (int argc, char *argv[])
 {
   GtkWidget *win;
+  GtkWidget *box;
   GtkWidget *button;
+  GtkWidget *button2;
   GtkBuilder *builder;
   GMenuModel *model;
   GSimpleActionGroup *actions;
   GtkWidget *overlay;
   GtkWidget *grid;
   GtkWidget *popover;
+  GtkWidget *popover2;
   GtkWidget *label;
   GtkWidget *check;
   GtkWidget *combo;
@@ -76,30 +113,37 @@ int main (int argc, char *argv[])
   builder = gtk_builder_new_from_file ("popover.ui");
   model = (GMenuModel *)gtk_builder_get_object (builder, "menu");
 
+  box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
   button = gtk_menu_button_new ();
+  gtk_container_add (GTK_CONTAINER (box), button);
+  button2 = gtk_menu_button_new ();
+  gtk_container_add (GTK_CONTAINER (box), button2);
+
   gtk_menu_button_set_menu_model (GTK_MENU_BUTTON (button), model);
   gtk_menu_button_set_use_popover (GTK_MENU_BUTTON (button), TRUE);
-
   popover = GTK_WIDGET (gtk_menu_button_get_popover (GTK_MENU_BUTTON (button)));
 
-  g_object_set (button, "margin", 10, NULL);
-  gtk_widget_set_halign (button, GTK_ALIGN_END);
-  gtk_widget_set_valign (button, GTK_ALIGN_START);
-  gtk_overlay_add_overlay (GTK_OVERLAY (overlay), button);
+  builder = gtk_builder_new_from_file ("popover2.ui");
+  gtk_builder_connect_signals (builder, NULL);
+  popover2 = (GtkWidget *)gtk_builder_get_object (builder, "popover");
+  gtk_menu_button_set_popover (GTK_MENU_BUTTON (button2), popover2);
+
+  g_object_set (box, "margin", 10, NULL);
+  gtk_widget_set_halign (box, GTK_ALIGN_END);
+  gtk_widget_set_valign (box, GTK_ALIGN_START);
+  gtk_overlay_add_overlay (GTK_OVERLAY (overlay), box);
 
   label = gtk_label_new ("Popover hexpand");
   check = gtk_check_button_new ();
-  g_object_bind_property (popover, "hexpand",
-                          check, "active",
-                          G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
+  g_object_bind_property (check, "active", popover, "hexpand", G_BINDING_DEFAULT);
+  g_object_bind_property (check, "active", popover2, "hexpand", G_BINDING_DEFAULT);
   gtk_grid_attach (GTK_GRID (grid), label , 1, 1, 1, 1);
   gtk_grid_attach (GTK_GRID (grid), check, 2, 1, 1, 1);
 
   label = gtk_label_new ("Popover vexpand");
   check = gtk_check_button_new ();
-  g_object_bind_property (popover, "vexpand",
-                          check, "active",
-                          G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
+  g_object_bind_property (check, "active", popover, "vexpand", G_BINDING_DEFAULT);
+  g_object_bind_property (check, "active", popover2, "vexpand", G_BINDING_DEFAULT);
   gtk_grid_attach (GTK_GRID (grid), label , 1, 2, 1, 1);
   gtk_grid_attach (GTK_GRID (grid), check, 2, 2, 1, 1);
 
@@ -110,9 +154,8 @@ int main (int argc, char *argv[])
   gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "left", "Left");
   gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "right", "Right");
 
-  g_object_bind_property (button, "direction",
-                          combo, "active",
-                          G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
+  g_object_bind_property (combo, "active", button, "direction", G_BINDING_DEFAULT);
+  g_object_bind_property (combo, "active", button2, "direction", G_BINDING_DEFAULT);
   gtk_grid_attach (GTK_GRID (grid), label , 1, 3, 1, 1);
   gtk_grid_attach (GTK_GRID (grid), combo, 2, 3, 1, 1);
 
@@ -122,9 +165,7 @@ int main (int argc, char *argv[])
   gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "start", "Start");
   gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "end", "End");
   gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "center", "Center");
-  g_object_bind_property (button, "halign",
-                          combo, "active",
-                          G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
+  g_object_bind_property (combo, "active", box, "halign", G_BINDING_DEFAULT);
   gtk_grid_attach (GTK_GRID (grid), label , 1, 4, 1, 1);
   gtk_grid_attach (GTK_GRID (grid), combo, 2, 4, 1, 1);
 
@@ -134,9 +175,7 @@ int main (int argc, char *argv[])
   gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "start", "Start");
   gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "end", "End");
   gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (combo), "center", "Center");
-  g_object_bind_property (button, "valign",
-                          combo, "active",
-                          G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
+  g_object_bind_property (combo, "active", box, "valign", G_BINDING_DEFAULT);
   gtk_grid_attach (GTK_GRID (grid), label , 1, 5, 1, 1);
   gtk_grid_attach (GTK_GRID (grid), combo, 2, 5, 1, 1);
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