Update gtk35

Gtk3/gtk35/main.cpp

@@ -1,9 +1,27 @@
 #include <gtk/gtk.h>
 
+void file_dialog(GtkWidget *widget,gpointer data){
+    GtkFileChooserAction action=GTK_FILE_CHOOSER_ACTION_OPEN;
+    GtkWidget *dialog=gtk_file_chooser_dialog_new("Open File",GTK_WINDOW(data),action,
+    "Cencel",GTK_RESPONSE_CANCEL,"OK",GTK_RESPONSE_OK,NULL);
+    gint res;
+    res=gtk_dialog_run(GTK_DIALOG(dialog));
+    if(res==GTK_RESPONSE_OK){
+        char *filename;
+        filename=gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
+        g_print("%s\n",filename);
+    }
+    gtk_widget_destroy(dialog);
+}
+
 static void gtkmain(GtkApplication *app,gpointer user_data){
+    //Main window
     GtkBuilder *builder=gtk_builder_new_from_file("window.ui");
     GObject *window=gtk_builder_get_object(builder,"window");
     gtk_application_add_window(app,GTK_WINDOW(window));
+    //dialog button
+    GObject *btn_dialog=gtk_builder_get_object(builder,"btnchoose");
+    g_signal_connect(btn_dialog,"clicked",G_CALLBACK(file_dialog),window);
     gtk_widget_show_all(GTK_WIDGET(window));
 }
 

Gtk3/gtk35/window.ui

@@ -13,7 +13,12 @@
     <property name="default_width">440</property>
     <property name="default_height">250</property>
     <child type="titlebar">
-      <placeholder/>
+      <object class="GtkButton" id="btnchoose">
+        <property name="label" translatable="yes">File Chooser dialog</property>
+        <property name="visible">True</property>
+        <property name="can_focus">True</property>
+        <property name="receives_default">True</property>
+      </object>
     </child>
     <child>
       <object class="GtkBox">
@@ -21,10 +26,19 @@
         <property name="can_focus">False</property>
         <property name="orientation">vertical</property>
         <child>
-          <placeholder/>
+          <object class="GtkScrolledWindow">
-        </child>
+            <property name="visible">True</property>
-        <child>
+            <property name="can_focus">True</property>
-          <placeholder/>
+            <property name="shadow_type">in</property>
+            <child>
+              <placeholder/>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
         </child>
         <child>
           <object class="GtkScrollbar">