[gtkmm] demo: Add the FlowBox demo part.

[Murray Cumming <murrayc src gnome org>]

commit f60fe412d5c35b39ec7b3e36d7ea0a664c08fe17
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Apr 9 09:29:26 2014 +0200

    demo: Add the FlowBox demo part.
    
    * demos/Makefile.am:
    * demos/gtk-demo/demos.h:
    * demos/gtk-demo/example_flowbox.cc:
      This is based on the example/demo code in bug #723801
      from Juan R. Garcia Blanco.

 demos/Makefile.am                 |    1 +
 demos/gtk-demo/demos.h            |    2 +
 demos/gtk-demo/example_flowbox.cc |  190 +++++++++++++++++++++++++++++++++++++
 3 files changed, 193 insertions(+), 0 deletions(-)
---
diff --git a/demos/Makefile.am b/demos/Makefile.am
index 4fdee66..a9c5f97 100644
--- a/demos/Makefile.am
+++ b/demos/Makefile.am
@@ -33,6 +33,7 @@ gtk_demo_gtkmm_demo_SOURCES =                         \
        gtk-demo/example_colorsel.cc                    \
        gtk-demo/example_dialog.cc                      \
        gtk-demo/example_drawingarea.cc                 \
+       gtk-demo/example_flowbox.cc                     \
        gtk-demo/example_icontheme.cc                   \
        gtk-demo/example_iconview.cc                    \
        gtk-demo/example_images.cc                      \
diff --git a/demos/gtk-demo/demos.h b/demos/gtk-demo/demos.h
index 1236d9b..66edc88 100644
--- a/demos/gtk-demo/demos.h
+++ b/demos/gtk-demo/demos.h
@@ -23,6 +23,7 @@ Gtk::Window* do_change_display();
 Gtk::Window* do_colorsel();
 Gtk::Window* do_dialog();
 Gtk::Window* do_drawingarea();
+Gtk::Window* do_flowbox();
 Gtk::Window* do_icontheme();
 Gtk::Window* do_iconview();
 Gtk::Window* do_images();
@@ -55,6 +56,7 @@ Demo testgtk_demos[] =
   { "Color Selector", "example_colorsel.cc", sigc::ptr_fun(&do_colorsel), 0 },
   { "Dialog and Message Boxes", "example_dialog.cc", sigc::ptr_fun(&do_dialog), 0 },
   { "Drawing Area", "example_drawingarea.cc", sigc::ptr_fun(&do_drawingarea), 0 },
+  { "Flow Box", "example_flowbox.cc",  sigc::ptr_fun(&do_flowbox), 0 },
   { "Icon Theme", "example_icontheme.cc", sigc::ptr_fun(&do_icontheme), 0 },  
   { "Icon View", "example_iconview.cc", sigc::ptr_fun(&do_iconview), 0 },  
   { "Images", "example_images.cc", sigc::ptr_fun(&do_images), 0 },
diff --git a/demos/gtk-demo/example_flowbox.cc b/demos/gtk-demo/example_flowbox.cc
new file mode 100644
index 0000000..a033bc3
--- /dev/null
+++ b/demos/gtk-demo/example_flowbox.cc
@@ -0,0 +1,190 @@
+/* Flow Box
+ *
+ * Gtk::FlowBox allows flexible and responsive grids which reflow
+ * as needed and support sorting and filtering.
+ *
+ * The children of a FlowBox are regular widgets
+ */
+
+#include "gtkmm.h"
+
+class Example_FlowBox : public Gtk::Window
+{
+public:
+  Example_FlowBox();
+  virtual ~Example_FlowBox();
+
+protected:
+
+  // Containers
+  Gtk::ScrolledWindow m_scrolled_window;
+  Gtk::FlowBox m_flow_box;
+
+private:
+  void fill_color_names();
+  Gtk::Button* create_color_swatch(int swatch_i);
+
+  std::vector<Glib::ustring> m_color_names;
+};
+
+//Called by DemoWindow;
+Gtk::Window* do_flowbox()
+{
+  return new Example_FlowBox();
+}
+
+Example_FlowBox::Example_FlowBox()
+{
+  // Window properties
+  set_title("FlowBox Example");
+  set_default_size(600, 400);
+  set_border_width(6);
+
+  // Scrolled window
+  m_scrolled_window.set_policy(Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
+
+  // Flow box
+  m_flow_box.set_max_children_per_line(30);
+  m_flow_box.set_selection_mode(Gtk::SELECTION_NONE);
+  m_flow_box.set_homogeneous();
+
+  // Color swatches
+  fill_color_names();
+  for(std::size_t i = 0; i != m_color_names.size(); ++i)
+  {
+    Gtk::Button* color_swatch = create_color_swatch(i);
+    m_flow_box.add(*color_swatch);
+  }
+
+  // Layout
+  m_scrolled_window.add(m_flow_box);
+  add(m_scrolled_window);
+
+  show_all_children();
+}
+
+Example_FlowBox::~Example_FlowBox()
+{
+}
+
+Gtk::Button* Example_FlowBox::create_color_swatch(int swatch_i)
+{
+  Gdk::RGBA rgba(m_color_names[swatch_i]);
+  Gtk::DrawingArea* drawing_area = Gtk::manage(new Gtk::DrawingArea());
+  Gtk::Button* color_swatch = Gtk::manage(new Gtk::Button());
+
+  drawing_area->set_size_request(24, 24);
+  drawing_area->override_background_color(rgba);
+
+  color_swatch->add(*drawing_area);
+
+  return color_swatch;
+}
+
+void Example_FlowBox::fill_color_names()
+{
+  m_color_names.push_back("AliceBlue");
+  m_color_names.push_back("AntiqueWhite");
+  m_color_names.push_back("AntiqueWhite1");
+  m_color_names.push_back("AntiqueWhite2");
+  m_color_names.push_back("AntiqueWhite3");
+  m_color_names.push_back("AntiqueWhite4");
+  m_color_names.push_back("aqua");
+  m_color_names.push_back("aquamarine");
+  m_color_names.push_back("aquamarine1");
+  m_color_names.push_back("aquamarine2");
+  m_color_names.push_back("aquamarine3");
+  m_color_names.push_back("aquamarine4");
+  m_color_names.push_back("azure");
+  m_color_names.push_back("azure1");
+  m_color_names.push_back("azure2");
+  m_color_names.push_back("azure3");
+  m_color_names.push_back("azure4");
+  m_color_names.push_back("beige");
+  m_color_names.push_back("bisque");
+  m_color_names.push_back("bisque1");
+  m_color_names.push_back("bisque2");
+  m_color_names.push_back("bisque3");
+  m_color_names.push_back("bisque4");
+  m_color_names.push_back("black");
+  m_color_names.push_back("BlanchedAlmond");
+  m_color_names.push_back("blue");
+  m_color_names.push_back("blue1");
+  m_color_names.push_back("blue2");
+  m_color_names.push_back("blue3");
+  m_color_names.push_back("blue4");
+  m_color_names.push_back("BlueViolet");
+  m_color_names.push_back("brown");
+  m_color_names.push_back("brown1");
+  m_color_names.push_back("brown2");
+  m_color_names.push_back("brown3");
+  m_color_names.push_back("brown4");
+  m_color_names.push_back("burlywood");
+  m_color_names.push_back("burlywood1");
+  m_color_names.push_back("burlywood2");
+  m_color_names.push_back("burlywood3");
+  m_color_names.push_back("burlywood4");
+  m_color_names.push_back("CadetBlue");
+  m_color_names.push_back("CadetBlue1");
+  m_color_names.push_back("CadetBlue2");
+  m_color_names.push_back("CadetBlue3");
+  m_color_names.push_back("CadetBlue4");
+  m_color_names.push_back("chartreuse");
+  m_color_names.push_back("chartreuse1");
+  m_color_names.push_back("chartreuse2");
+  m_color_names.push_back("chartreuse3");
+  m_color_names.push_back("chartreuse4");
+  m_color_names.push_back("chocolate");
+  m_color_names.push_back("chocolate1");
+  m_color_names.push_back("chocolate2");
+  m_color_names.push_back("chocolate3");
+  m_color_names.push_back("chocolate4");
+  m_color_names.push_back("coral");
+  m_color_names.push_back("coral1");
+  m_color_names.push_back("coral2");
+  m_color_names.push_back("coral3");
+  m_color_names.push_back("coral4");
+  m_color_names.push_back("CornflowerBlue");
+  m_color_names.push_back("cornsilk");
+  m_color_names.push_back("cornsilk1");
+  m_color_names.push_back("cornsilk2");
+  m_color_names.push_back("cornsilk3");
+  m_color_names.push_back("cornsilk4");
+  m_color_names.push_back("crimson");
+  m_color_names.push_back("cyan");
+  m_color_names.push_back("cyan1");
+  m_color_names.push_back("cyan2");
+  m_color_names.push_back("cyan3");
+  m_color_names.push_back("cyan4");
+  m_color_names.push_back("DarkBlue");
+  m_color_names.push_back("DarkCyan");
+  m_color_names.push_back("DarkGoldenrod");
+  m_color_names.push_back("DarkGoldenrod1");
+  m_color_names.push_back("DarkGoldenrod2");
+  m_color_names.push_back("DarkGoldenrod3");
+  m_color_names.push_back("DarkGoldenrod4");
+  m_color_names.push_back("DarkGray");
+  m_color_names.push_back("DarkGreen");
+  m_color_names.push_back("DarkGrey");
+  m_color_names.push_back("DarkKhaki");
+  m_color_names.push_back("DarkMagenta");
+  m_color_names.push_back("DarkOliveGreen");
+  m_color_names.push_back("DarkOliveGreen1");
+  m_color_names.push_back("DarkOliveGreen2");
+  m_color_names.push_back("DarkOliveGreen3");
+  m_color_names.push_back("DarkOliveGreen4");
+  m_color_names.push_back("DarkOrange");
+  m_color_names.push_back("DarkOrange1");
+  m_color_names.push_back("DarkOrange2");
+  m_color_names.push_back("DarkOrange3");
+  m_color_names.push_back("DarkOrange4");
+  m_color_names.push_back("DarkOrchid");
+  m_color_names.push_back("DarkOrchid1");
+  m_color_names.push_back("DarkOrchid2");
+  m_color_names.push_back("DarkOrchid3");
+  m_color_names.push_back("DarkOrchid4");
+  m_color_names.push_back("DarkRed");
+  m_color_names.push_back("DarkSalmon");
+  m_color_names.push_back("DarkSeaGreen");
+  m_color_names.push_back("DarkSeaGreen1");
+}