[gnome-devel-docs] demos: multicolumn combobox for Vala

[Tiffany Antopolski <antopolski src gnome org>]

commit af675db8d2faf030179cf98a9b1f91fb360c54d2
Author: Tiffany Ann Antopolski <tiffany antopolski gmail com>
Date:   Wed Jun 19 17:54:11 2013 -0400

    demos: multicolumn combobox for Vala

 platform-demos/C/combobox_multicolumn.vala.page    |   44 +++++++++++
 platform-demos/C/samples/combobox_multicolumn.vala |   76 ++++++++++++++++++++
 platform-demos/Makefile.am                         |    2 +
 3 files changed, 122 insertions(+), 0 deletions(-)
---
diff --git a/platform-demos/C/combobox_multicolumn.vala.page b/platform-demos/C/combobox_multicolumn.vala.page
new file mode 100644
index 0000000..9fc5de7
--- /dev/null
+++ b/platform-demos/C/combobox_multicolumn.vala.page
@@ -0,0 +1,44 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<page xmlns="http://projectmallard.org/1.0/";
+      xmlns:xi="http://www.w3.org/2001/XInclude";
+      type="guide" style="task"
+      id="combobox_multicolumn.vala">
+  <info>
+    <title type="text">ComboBox (Vala)</title>
+    <link type="guide" xref="beginner.vala#menu-combo-toolbar"/>
+    <link type="seealso" xref="combobox.vala"/>
+    <revision version="0.1" date="2013-06-18" status="review"/>
+
+    <credit type="author copyright">
+      <name>Tiffany Antopolski</name>
+      <email>tiffany antopolski gmail com</email>
+      <years>2013</years>
+    </credit>
+
+    <desc>A widget used to choose from a list of items</desc>
+  </info>
+
+  <title>ComboBox (two columns)</title>
+  <media type="image" mime="image/png" src="media/combobox_multicolumn.png"/>
+  <p>This ComboBox prints to the terminal your selection when you change it.</p>
+
+  <links type="section" />
+
+  <section id="code">
+    <title>Code used to generate this example</title>
+    <code mime="text/x-csharp" style="numbered"><xi:include href="samples/combobox_multicolumn.vala" 
parse="text"><xi:fallback/></xi:include></code>
+
+  </section>
+
+  <section id="references">
+    <title>API References</title>
+    <p>In this sample we used the following:</p>
+    <list>
+      <item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.ComboBox.html";>GtkComboBox</link></p></item>
+      <item><p><link href="http://www.valadoc.org/gtk+-3.0/Gtk.ListStore.html";>GtkListStore</link></p></item>
+      <item><p><link 
href="http://www.valadoc.org/gtk+-3.0/Gtk.CellRendererText.html";>GtkCellRendererText</link></p></item>
+      <item><p><link 
href="http://www.valadoc.org/gtk+-3.0/Gtk.CellRendererPixbuf.html";>GtkCellRendererPixbuf</link></p></item>
+      <item><p><link href="http://developer.gnome.org/gtk3/unstable/gtk3-Stock-Items.html";>Stock 
Items</link></p></item>
+    </list>
+  </section>
+</page>
diff --git a/platform-demos/C/samples/combobox_multicolumn.vala 
b/platform-demos/C/samples/combobox_multicolumn.vala
new file mode 100644
index 0000000..8b58532
--- /dev/null
+++ b/platform-demos/C/samples/combobox_multicolumn.vala
@@ -0,0 +1,76 @@
+class MyWindow : Gtk.ApplicationWindow {
+
+       string[] file = {"Select", "New", "Open", "Save"};
+       string[] stock_item = {"","gtk-new", "gtk-open", "gtk-save"};
+
+       enum Column {
+               FILE,
+               STOCK_ITEM      
+       }
+
+       /* Constructor */
+       internal MyWindow (MyApplication app) {
+               Object (application: app, title: "Welcome to GNOME");
+
+               this.set_default_size (200, -1);
+               this.border_width = 10;
+
+               Gtk.ListStore liststore = new Gtk.ListStore (2, typeof (string), typeof (string));
+
+               for (int i = 0; i < file.length; i++){
+                       Gtk.TreeIter iter;
+                       liststore.append (out iter);
+                       liststore.set (iter, Column.FILE, file[i]);
+                       liststore.set (iter, Column.STOCK_ITEM, stock_item[i]);
+               }
+
+               Gtk.ComboBox combobox = new Gtk.ComboBox.with_model (liststore);
+
+               /* CellRenderers render the data. */
+               Gtk.CellRendererText cell = new Gtk.CellRendererText ();
+               Gtk.CellRendererPixbuf cell_pb = new Gtk.CellRendererPixbuf ();
+               
+                /* we pack the cell into the beginning of the combobox, allocating
+                * no more space than needed;
+                * first the image, then the text;
+                * note that it does not matter in which order they are in the model,
+                * the visualization is decided by the order of the cellrenderers
+                */
+               combobox.pack_start (cell_pb, false);
+               combobox.pack_start (cell, false);
+
+               /* associate a property of the cellrenderer to a column in the model
+                * used by the combobox
+                */
+               combobox.set_attributes (cell_pb, "stock_id", Column.STOCK_ITEM);
+               combobox.set_attributes (cell, "text", Column.FILE);
+
+               /* Set the first item in the list to be selected (active). */
+               combobox.set_active (0);
+
+               /* Connect the 'changed' signal of the combobox
+                * to the signal handler (aka. callback function.
+                */
+               combobox.changed.connect (this.item_changed);
+
+               /* Add the combobox to this window */
+               this.add (combobox);
+               combobox.show ();
+       }
+
+       void item_changed (Gtk.ComboBox combo) {
+               if (combo.get_active () !=0) {
+                       print ("You chose " + file [combo.get_active ()] +"\n");
+               }
+       }
+}
+
+class MyApplication : Gtk.Application {
+        protected override void activate () {
+                new MyWindow (this).show ();
+        }
+}
+
+int main (string[] args) {
+       return new MyApplication ().run (args);
+}
diff --git a/platform-demos/Makefile.am b/platform-demos/Makefile.am
index 486b1f2..d572141 100644
--- a/platform-demos/Makefile.am
+++ b/platform-demos/Makefile.am
@@ -47,6 +47,7 @@ demo_sources =        \
        samples/combobox.py                     \
        samples/combobox.vala                   \
        samples/combobox_multicolumn.py         \
+       samples/combobox_multicolumn.vala       \
        samples/dialog.c                        \
        samples/dialog.js                       \
        samples/dialog.py                       \
@@ -317,6 +318,7 @@ HELP_FILES =                                \
        combobox.py.page                \
        combobox.vala.page              \
        combobox_multicolumn.py.page    \
+       combobox_multicolumn.vala.page  \
        cpp.page                        \
        dialog.c.page                   \
        dialog.js.page                  \