Examples
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## Examples

### ListStore

This example has a `Gtk::TreeView` widget, with a `Gtk::ListStore` model.

Figure 8.3. TreeView - ListStore

Source Code

File: examplewindow.h

    #ifndef GTKMM_EXAMPLEWINDOW_H
    #define GTKMM_EXAMPLEWINDOW_H

    #include <gtkmm.h>

    class ExampleWindow : public Gtk::Window
    {
    public:
      ExampleWindow();
      virtual ~ExampleWindow();

    protected:
      //Signal handlers:
      virtual void on_button_quit();

      //Tree model columns:
      class ModelColumns : public Gtk::TreeModel::ColumnRecord
      {
      public:

        ModelColumns()
        { add(m_col_id); add(m_col_name); }

        Gtk::TreeModelColumn<unsigned int> m_col_id;
        Gtk::TreeModelColumn<Glib::ustring> m_col_name;
      };

      ModelColumns m_Columns;

      //Child widgets:
      Gtk::VBox m_VBox;

      Gtk::ScrolledWindow m_ScrolledWindow;
      Gtk::TreeView m_TreeView;
      Glib::RefPtr<Gtk::ListStore> m_refTreeModel;

      Gtk::HButtonBox m_ButtonBox;
      Gtk::Button m_Button_Quit;
    };

    #endif //GTKMM_EXAMPLEWINDOW_H

File: examplewindow.cc

    #include <iostream>
    #include "examplewindow.h"

    ExampleWindow::ExampleWindow()
    : m_Button_Quit("Quit")
    {
      set_title("Gtk::TreeView (ListStore) example");
      set_border_width(5);
      set_default_size(400, 200);

      add(m_VBox);

      //Add the TreeView, inside a ScrolledWindow, with the button underneath:
      m_ScrolledWindow.add(m_TreeView);

      //Only show the scrollbars when they are necessary:
      m_ScrolledWindow.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);

      m_VBox.pack_start(m_ScrolledWindow);
      m_VBox.pack_start(m_ButtonBox, Gtk::PACK_SHRINK);

      m_ButtonBox.pack_start(m_Button_Quit, Gtk::PACK_SHRINK);
      m_ButtonBox.set_border_width(5);
      m_ButtonBox.set_layout(Gtk::BUTTONBOX_END);
      m_Button_Quit.signal_clicked().connect( sigc::mem_fun(*this, &ExampleWindow::on_button_quit) );

      //Create the Tree model:
      m_refTreeModel = Gtk::ListStore::create(m_Columns);
      m_TreeView.set_model(m_refTreeModel);

      //Fill the TreeView's model
      Gtk::TreeModel::Row row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 1;
      row[m_Columns.m_col_name] = "Billy Bob";

      row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 2;
      row[m_Columns.m_col_name] = "Joey Jojo";

      row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 3;
      row[m_Columns.m_col_name] = "Rob McRoberts";

      //Add the TreeView's view columns:
      m_TreeView.append_column("ID", m_Columns.m_col_id);
      m_TreeView.append_column("Name", m_Columns.m_col_name);

      //Make all the columns reorderable:
      //This is not necessary, but it's nice to show the feature.
      //You can use TreeView::set_column_drag_function() to more
      //finely control column drag and drop.
      for(guint i = 0; i < 2; i++)
      {
        Gtk::TreeView::Column* pColumn = m_TreeView.get_column(i);
        pColumn->set_reorderable();
      }

      show_all_children();
    }

    ExampleWindow::~ExampleWindow()
    {
    }

    void ExampleWindow::on_button_quit()
    {
      hide();
    }

File: main.cc

    #include <gtkmm/main.h>
    #include "examplewindow.h"

    int main(int argc, char *argv[])
    {
      Gtk::Main kit(argc, argv);

      ExampleWindow window;
      Gtk::Main::run(window); //Shows the window and returns when it is closed.

      return 0;
    }

### TreeStore

This example is very similar to the ListStore example, but uses a `Gtk::TreeStore` model instead, and adds children to the rows.

Figure 8.4. TreeView - TreeStore

Source Code

File: examplewindow.h

    #ifndef GTKMM_EXAMPLEWINDOW_H
    #define GTKMM_EXAMPLEWINDOW_H

    #include <gtkmm.h>

    class ExampleWindow : public Gtk::Window
    {
    public:
      ExampleWindow();
      virtual ~ExampleWindow();

    protected:
      //Signal handlers:
      virtual void on_button_quit();
      virtual void on_treeview_row_activated(const Gtk::TreeModel::Path& path, Gtk::TreeViewColumn* column);

      //Tree model columns:
      class ModelColumns : public Gtk::TreeModel::ColumnRecord
      {
      public:

        ModelColumns()
        { add(m_col_id); add(m_col_name); }

        Gtk::TreeModelColumn<int> m_col_id;
        Gtk::TreeModelColumn<Glib::ustring> m_col_name;
      };

      ModelColumns m_Columns;

      //Child widgets:
      Gtk::VBox m_VBox;

      Gtk::ScrolledWindow m_ScrolledWindow;
      Gtk::TreeView m_TreeView;
      Glib::RefPtr<Gtk::TreeStore> m_refTreeModel;

      Gtk::HButtonBox m_ButtonBox;
      Gtk::Button m_Button_Quit;
    };

    #endif //GTKMM_EXAMPLEWINDOW_H

File: examplewindow.cc

    #include <iostream>
    #include "examplewindow.h"

    ExampleWindow::ExampleWindow()
    : m_Button_Quit("Quit")
    {
      set_title("Gtk::TreeView (TreeStore) example");
      set_border_width(5);
      set_default_size(400, 200);

      add(m_VBox);

      //Add the TreeView, inside a ScrolledWindow, with the button underneath:
      m_ScrolledWindow.add(m_TreeView);

      //Only show the scrollbars when they are necessary:
      m_ScrolledWindow.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);

      m_VBox.pack_start(m_ScrolledWindow);
      m_VBox.pack_start(m_ButtonBox, Gtk::PACK_SHRINK);

      m_ButtonBox.pack_start(m_Button_Quit, Gtk::PACK_SHRINK);
      m_ButtonBox.set_border_width(5);
      m_ButtonBox.set_layout(Gtk::BUTTONBOX_END);
      m_Button_Quit.signal_clicked().connect( sigc::mem_fun(*this, &ExampleWindow::on_button_quit) );

      //Create the Tree model:
      m_refTreeModel = Gtk::TreeStore::create(m_Columns);
      m_TreeView.set_model(m_refTreeModel);

      //All the items to be reordered with drag-and-drop:
      m_TreeView.set_reorderable();

      //Fill the TreeView's model
      Gtk::TreeModel::Row row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 1;
      row[m_Columns.m_col_name] = "Billy Bob";

      Gtk::TreeModel::Row childrow = *(m_refTreeModel->append(row.children()));
      childrow[m_Columns.m_col_id] = 11;
      childrow[m_Columns.m_col_name] = "Billy Bob Junior";

      childrow = *(m_refTreeModel->append(row.children()));
      childrow[m_Columns.m_col_id] = 12;
      childrow[m_Columns.m_col_name] = "Sue Bob";

      row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 2;
      row[m_Columns.m_col_name] = "Joey Jojo";

      row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 3;
      row[m_Columns.m_col_name] = "Rob McRoberts";

      childrow = *(m_refTreeModel->append(row.children()));
      childrow[m_Columns.m_col_id] = 31;
      childrow[m_Columns.m_col_name] = "Xavier McRoberts";

      //Add the TreeView's view columns:
      m_TreeView.append_column("ID", m_Columns.m_col_id);
      m_TreeView.append_column("Name", m_Columns.m_col_name);

      //Connect signal:
      m_TreeView.signal_row_activated().connect( sigc::mem_fun(*this, &ExampleWindow::on_treeview_row_activated) );

      show_all_children();
    }

    ExampleWindow::~ExampleWindow()
    {
    }

    void ExampleWindow::on_button_quit()
    {
      hide();
    }

    void ExampleWindow::on_treeview_row_activated(const Gtk::TreeModel::Path& path, Gtk::TreeViewColumn* /* column */)
    {
      Gtk::TreeModel::iterator iter = m_refTreeModel->get_iter(path);
      if(iter)
      {
        Gtk::TreeModel::Row row = *iter;
        std::cout << "Row activated: ID=" << row[m_Columns.m_col_id] << ", Name=" << row[m_Columns.m_col_name] << std::endl;
      }
    }

File: main.cc

    #include <gtkmm/main.h>
    #include "examplewindow.h"

    int main(int argc, char *argv[])
    {
      Gtk::Main kit(argc, argv);

      ExampleWindow window;
      Gtk::Main::run(window); //Shows the window and returns when it is closed.

      return 0;
    }

### Editable Cells

This example is identical to the ListStore example, but it uses `TreeView::append_column_editable()` instead of `TreeView::append_column()`.

Figure 8.5. TreeView - Editable Cells

Source Code

File: examplewindow.h

    #ifndef GTKMM_EXAMPLEWINDOW_H
    #define GTKMM_EXAMPLEWINDOW_H

    #include <gtkmm.h>

    class ExampleWindow : public Gtk::Window
    {
    public:
      ExampleWindow();
      virtual ~ExampleWindow();

    protected:
      //Signal handlers:
      virtual void on_button_quit();

      //Tree model columns:
      class ModelColumns : public Gtk::TreeModel::ColumnRecord
      {
      public:

        ModelColumns()
        { add(m_col_id); add(m_col_name); add(m_col_foo); }

        Gtk::TreeModelColumn<unsigned int> m_col_id;
        Gtk::TreeModelColumn<Glib::ustring> m_col_name;
        Gtk::TreeModelColumn<bool> m_col_foo;
      };

      ModelColumns m_Columns;

      //Child widgets:
      Gtk::VBox m_VBox;

      Gtk::ScrolledWindow m_ScrolledWindow;
      Gtk::TreeView m_TreeView;
      Glib::RefPtr<Gtk::ListStore> m_refTreeModel;

      Gtk::HButtonBox m_ButtonBox;
      Gtk::Button m_Button_Quit;
    };

    #endif //GTKMM_EXAMPLEWINDOW_H

File: examplewindow.cc

    #include <iostream>
    #include "examplewindow.h"

    ExampleWindow::ExampleWindow()
    : m_Button_Quit("Quit")
    {
      set_title("Gtk::TreeView Editable Cells example");
      set_border_width(5);
      set_default_size(400, 200);

      add(m_VBox);

      //Add the TreeView, inside a ScrolledWindow, with the button underneath:
      m_ScrolledWindow.add(m_TreeView);

      //Only show the scrollbars when they are necessary:
      m_ScrolledWindow.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);

      m_VBox.pack_start(m_ScrolledWindow);
      m_VBox.pack_start(m_ButtonBox, Gtk::PACK_SHRINK);

      m_ButtonBox.pack_start(m_Button_Quit, Gtk::PACK_SHRINK);
      m_ButtonBox.set_border_width(5);
      m_ButtonBox.set_layout(Gtk::BUTTONBOX_END);
      m_Button_Quit.signal_clicked().connect( sigc::mem_fun(*this, &ExampleWindow::on_button_quit) );

      //Create the Tree model:
      m_refTreeModel = Gtk::ListStore::create(m_Columns);
      m_TreeView.set_model(m_refTreeModel);

      //Fill the TreeView's model
      Gtk::TreeModel::Row row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 1;
      row[m_Columns.m_col_name] = "Billy Bob";
      row[m_Columns.m_col_foo] = true;

      row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 2;
      row[m_Columns.m_col_name] = "Joey Jojo";
      row[m_Columns.m_col_foo] = true;

      row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 3;
      row[m_Columns.m_col_name] = "Rob McRoberts";
      row[m_Columns.m_col_foo] = false;

      //Add the TreeView's view columns:
      m_TreeView.append_column_editable("ID", m_Columns.m_col_id);
      m_TreeView.append_column_editable("Name", m_Columns.m_col_name);
      m_TreeView.append_column_editable("foo", m_Columns.m_col_foo);

      show_all_children();
    }

    ExampleWindow::~ExampleWindow()
    {
    }

    void ExampleWindow::on_button_quit()
    {
      hide();
    }

File: main.cc

    #include <gtkmm/main.h>
    #include "examplewindow.h"

    int main(int argc, char *argv[])
    {
      Gtk::Main kit(argc, argv);

      ExampleWindow window;
      Gtk::Main::run(window); //Shows the window and returns when it is closed.

      return 0;
    }

### Drag and Drop

This example is much like the TreeStore example, but has 2 extra columns to indicate whether the row can be dragged, and whether it can receive drag-and-dropped rows. It uses a derived `Gtk::TreeStore` which overrides the virtual functions as described in the TreeView Drag and Drop section..

Figure 8.6. TreeView - Drag And Drop

Source Code

File: examplewindow.h

    #ifndef GTKMM_EXAMPLEWINDOW_H
    #define GTKMM_EXAMPLEWINDOW_H

    #include <gtkmm.h>
    #include "treemodel_dnd.h"

    class ExampleWindow : public Gtk::Window
    {
    public:
      ExampleWindow();
      virtual ~ExampleWindow();

    protected:
      //Signal handlers:
      virtual void on_button_quit();

      //Child widgets:
      Gtk::VBox m_VBox;

      Gtk::ScrolledWindow m_ScrolledWindow;
      Gtk::TreeView m_TreeView;
      Glib::RefPtr<TreeModel_Dnd> m_refTreeModel;

      Gtk::HButtonBox m_ButtonBox;
      Gtk::Button m_Button_Quit;
    };

    #endif //GTKMM_EXAMPLEWINDOW_H

File: treemodel_dnd.h

    #ifndef GTKMM_EXAMPLE_TREEMODEL_DND_H
    #define GTKMM_EXAMPLE_TREEMODEL_DND_H

    #include <gtkmm.h>

    class TreeModel_Dnd : public Gtk::TreeStore
    {
    protected:
      TreeModel_Dnd();

    public:

       //Tree model columns:
      class ModelColumns : public Gtk::TreeModel::ColumnRecord
      {
      public:

        ModelColumns()
        { add(m_col_id); add(m_col_name); add(m_col_draggable); add(m_col_receivesdrags); }

        Gtk::TreeModelColumn<int> m_col_id;
        Gtk::TreeModelColumn<Glib::ustring> m_col_name;
        Gtk::TreeModelColumn<bool> m_col_draggable;
        Gtk::TreeModelColumn<bool> m_col_receivesdrags;
      };

      ModelColumns m_Columns;

      static Glib::RefPtr<TreeModel_Dnd> create();

    protected:
      //Overridden virtual functions:
      virtual bool row_draggable_vfunc(const Gtk::TreeModel::Path& path) const;
      virtual bool row_drop_possible_vfunc(const Gtk::TreeModel::Path& dest, const Gtk::SelectionData& selection_data) const;

    };

    #endif //GTKMM_EXAMPLE_TREEMODEL_DND_H

File: examplewindow.cc

    #include <iostream>
    #include "examplewindow.h"

    ExampleWindow::ExampleWindow()
    : m_Button_Quit(Gtk::Stock::QUIT)
    {
      set_title("Gtk::TreeView (Drag and Drop) example");
      set_border_width(5);
      set_default_size(400, 200);

      add(m_VBox);

      //Add the TreeView, inside a ScrolledWindow, with the button underneath:
      m_ScrolledWindow.add(m_TreeView);

      //Only show the scrollbars when they are necessary:
      m_ScrolledWindow.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);

      m_VBox.pack_start(m_ScrolledWindow);
      m_VBox.pack_start(m_ButtonBox, Gtk::PACK_SHRINK);

      m_ButtonBox.pack_start(m_Button_Quit, Gtk::PACK_SHRINK);
      m_ButtonBox.set_border_width(5);
      m_ButtonBox.set_layout(Gtk::BUTTONBOX_END);
      m_Button_Quit.signal_clicked().connect( sigc::mem_fun(*this, &ExampleWindow::on_button_quit) );

      //Create the Tree model:
      //Use our derived model, which overrides some Gtk::TreeDragDest and Gtk::TreeDragSource virtual functions:
      m_refTreeModel = TreeModel_Dnd::create(); //The columns are declared in the overridden TreeModel.
      m_TreeView.set_model(m_refTreeModel);

      //Enable Drag-and-Drop of TreeView rows:
      //See also the derived TreeModel's *_vfunc overrides.
      m_TreeView.enable_model_drag_source();
      m_TreeView.enable_model_drag_dest();

      //Fill the TreeView's model
      Gtk::TreeModel::Row row = *(m_refTreeModel->append());
      row[m_refTreeModel->m_Columns.m_col_id] = 1;
      row[m_refTreeModel->m_Columns.m_col_name] = "Billy Bob";
      row[m_refTreeModel->m_Columns.m_col_draggable] = true;
      row[m_refTreeModel->m_Columns.m_col_receivesdrags] = true;

      Gtk::TreeModel::Row childrow = *(m_refTreeModel->append(row.children()));
      childrow[m_refTreeModel->m_Columns.m_col_id] = 11;
      childrow[m_refTreeModel->m_Columns.m_col_name] = "Billy Bob Junior";
      childrow[m_refTreeModel->m_Columns.m_col_draggable] = true;
      childrow[m_refTreeModel->m_Columns.m_col_receivesdrags] = true;

      childrow = *(m_refTreeModel->append(row.children()));
      childrow[m_refTreeModel->m_Columns.m_col_id] = 12;
      childrow[m_refTreeModel->m_Columns.m_col_name] = "Sue Bob";
      childrow[m_refTreeModel->m_Columns.m_col_draggable] = true;
      childrow[m_refTreeModel->m_Columns.m_col_receivesdrags] = true;

      row = *(m_refTreeModel->append());
      row[m_refTreeModel->m_Columns.m_col_id] = 2;
      row[m_refTreeModel->m_Columns.m_col_name] = "Joey Jojo";
      row[m_refTreeModel->m_Columns.m_col_draggable] = true;
      row[m_refTreeModel->m_Columns.m_col_receivesdrags] = true;

      row = *(m_refTreeModel->append());
      row[m_refTreeModel->m_Columns.m_col_id] = 3;
      row[m_refTreeModel->m_Columns.m_col_name] = "Rob McRoberts";
      row[m_refTreeModel->m_Columns.m_col_draggable] = true;
      row[m_refTreeModel->m_Columns.m_col_receivesdrags] = true;

      childrow = *(m_refTreeModel->append(row.children()));
      childrow[m_refTreeModel->m_Columns.m_col_id] = 31;
      childrow[m_refTreeModel->m_Columns.m_col_name] = "Xavier McRoberts";
      childrow[m_refTreeModel->m_Columns.m_col_draggable] = true;
      childrow[m_refTreeModel->m_Columns.m_col_receivesdrags] = true;

      //Add the TreeView's view columns:
      m_TreeView.append_column("ID", m_refTreeModel->m_Columns.m_col_id);
      m_TreeView.append_column("Name", m_refTreeModel->m_Columns.m_col_name);
      m_TreeView.append_column_editable("Draggable", m_refTreeModel->m_Columns.m_col_draggable);
      m_TreeView.append_column_editable("Receives Drags", m_refTreeModel->m_Columns.m_col_receivesdrags);

      show_all_children();
    }

    ExampleWindow::~ExampleWindow()
    {
    }

    void ExampleWindow::on_button_quit()
    {
      hide();
    }

File: main.cc

    #include <gtkmm/main.h>
    #include "examplewindow.h"

    int main(int argc, char *argv[])
    {
      Gtk::Main kit(argc, argv);

      ExampleWindow window;
      Gtk::Main::run(window); //Shows the window and returns when it is closed.

      return 0;
    }

File: treemodel_dnd.cc

    #include "treemodel_dnd.h"
    #include <iostream>

    TreeModel_Dnd::TreeModel_Dnd()
    {
      //We can't just call Gtk::TreeModel(m_Columns) in the initializer list
      //because m_Columns does not exist when the base class constructor runs.
      //And we can't have a static m_Columns instance, because that would be
      //instantiated before the gtkmm type system.
      //So, we use this method, which should only be used just after creation:
      set_column_types(m_Columns);
    }

    Glib::RefPtr<TreeModel_Dnd> TreeModel_Dnd::create()
    {
      return Glib::RefPtr<TreeModel_Dnd>( new TreeModel_Dnd() );
    }

    bool TreeModel_Dnd::row_draggable_vfunc(const Gtk::TreeModel::Path& path) const
    {
      //Make the value of the "draggable" column determine whether this row can be dragged:

      TreeModel_Dnd* unconstThis = const_cast<TreeModel_Dnd*>(this); //TODO: Add a const version of get_iter to TreeModel:
      const_iterator iter = unconstThis->get_iter(path);
      //const_iterator iter = get_iter(path);
      if(iter)
      {
        Row row = *iter;
        bool is_draggable = row[m_Columns.m_col_draggable];
        return is_draggable;
      }

      return Gtk::TreeStore::row_draggable_vfunc(path);
    }

    bool TreeModel_Dnd::row_drop_possible_vfunc(const Gtk::TreeModel::Path& dest, const Gtk::SelectionData& selection_data) const
    {
      //Make the value of the "receives drags" column determine whether a row can be dragged into it:

      //dest is the path that the row would have after it has been dropped:
      //But in this case we are more interested in the parent row:
      Gtk::TreeModel::Path dest_parent = dest;
      bool dest_is_not_top_level = dest_parent.up();
      if(!dest_is_not_top_level || dest_parent.empty())
      {
        //The user wants to move something to the top-level.
        //Let's always allow that.
      }
      else
      {
        //Get an iterator for the row at this path:
        //We must unconst this. This should not be necessary with a future version of gtkmm.
        TreeModel_Dnd* unconstThis = const_cast<TreeModel_Dnd*>(this); //TODO: Add a const version of get_iter to TreeModel:
        const_iterator iter_dest_parent = unconstThis->get_iter(dest_parent);
        //const_iterator iter_dest_parent = get_iter(dest);
        if(iter_dest_parent)
        {
          Row row = *iter_dest_parent;
          bool receives_drags = row[m_Columns.m_col_receivesdrags];
          return receives_drags;
        }
      }

      //You could also examine the row being dragged (via selection_data)
      //if you must look at both rows to see whether a drop should be allowed.
      //You could use
      //TODO: Add const version of get_from_selection_data(): Glib::RefPtr<const Gtk::TreeModel> refThis = Glib::RefPtr<const Gtk::TreeModel>(this);
      //Glib::RefPtr<Gtk::TreeModel> refThis = Glib::RefPtr<Gtk::TreeModel>(const_cast<TreeModel_Dnd*>(this));
      //refThis->reference(); //, true /* take_copy */)
      //Gtk::TreeModel::Path path_dragged_row;
      //Gtk::TreeModel::Path::get_from_selection_data(selection_data, refThis, path_dragged_row);

      return Gtk::TreeStore::row_drop_possible_vfunc(dest, selection_data);
    }

### Popup Context Menu

This example is much like the ListStore example, but derives a custom TreeView in order to override the `button_press_event`, and also to encapsulate the tree model code in our derived class. See the TreeView Popup Context Menu section.

Figure 8.7. TreeView - Popup Context Menu

Source Code

File: examplewindow.h

    #ifndef GTKMM_EXAMPLEWINDOW_H
    #define GTKMM_EXAMPLEWINDOW_H

    #include <gtkmm.h>
    #include "treeview_withpopup.h"

    class ExampleWindow : public Gtk::Window
    {
    public:
      ExampleWindow();
      virtual ~ExampleWindow();

    protected:
      //Signal handlers:
      virtual void on_button_quit();

      //Child widgets:
      Gtk::VBox m_VBox;

      Gtk::ScrolledWindow m_ScrolledWindow;
      TreeView_WithPopup m_TreeView;

      Gtk::HButtonBox m_ButtonBox;
      Gtk::Button m_Button_Quit;
    };

    #endif //GTKMM_EXAMPLEWINDOW_H

File: treeview_withpopup.h

    #ifndef GTKMM_EXAMPLE_TREEVIEW_WITHPOPUP_H
    #define GTKMM_EXAMPLE_TREEVIEW_WITHPOPUP_H

    #include <gtkmm.h>

    class TreeView_WithPopup : public Gtk::TreeView
    {
    public:
      TreeView_WithPopup();
      virtual ~TreeView_WithPopup();

    protected:
      // Override Signal handler:
      // Alternatively, use signal_button_press_event().connect_notify()
      virtual bool on_button_press_event(GdkEventButton *ev);

      //Signal handler for popup menu items:
      virtual void on_menu_file_popup_generic();

      //Tree model columns:
      class ModelColumns : public Gtk::TreeModel::ColumnRecord
      {
      public:

        ModelColumns()
        { add(m_col_id); add(m_col_name); }

        Gtk::TreeModelColumn<unsigned int> m_col_id;
        Gtk::TreeModelColumn<Glib::ustring> m_col_name;
      };

      ModelColumns m_Columns;

      //The Tree model:
      Glib::RefPtr<Gtk::ListStore> m_refTreeModel;

      Gtk::Menu m_Menu_Popup;
    };

    #endif //GTKMM_EXAMPLE_TREEVIEW_WITHPOPUP_H

File: examplewindow.cc

    #include <iostream>
    #include "examplewindow.h"

    ExampleWindow::ExampleWindow()
    : m_Button_Quit("Quit")
    {
      set_title("Gtk::TreeView (ListStore) example");
      set_border_width(5);
      set_default_size(400, 200);

      add(m_VBox);

      //Add the TreeView, inside a ScrolledWindow, with the button underneath:
      m_ScrolledWindow.add(m_TreeView);

      //Only show the scrollbars when they are necessary:
      m_ScrolledWindow.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);

      m_VBox.pack_start(m_ScrolledWindow);
      m_VBox.pack_start(m_ButtonBox, Gtk::PACK_SHRINK);

      m_ButtonBox.pack_start(m_Button_Quit, Gtk::PACK_SHRINK);
      m_ButtonBox.set_border_width(5);
      m_ButtonBox.set_layout(Gtk::BUTTONBOX_END);
      m_Button_Quit.signal_clicked().connect( sigc::mem_fun(*this, &ExampleWindow::on_button_quit) );

      show_all_children();
    }

    ExampleWindow::~ExampleWindow()
    {
    }

    void ExampleWindow::on_button_quit()
    {
      hide();
    }

File: main.cc

    #include <gtkmm/main.h>
    #include "examplewindow.h"

    int main(int argc, char *argv[])
    {
      Gtk::Main kit(argc, argv);

      ExampleWindow window;
      Gtk::Main::run(window); //Shows the window and returns when it is closed.

      return 0;
    }

File: treeview_withpopup.cc

    #include "treeview_withpopup.h"
    #include <iostream>

    TreeView_WithPopup::TreeView_WithPopup()
    {
      //Create the Tree model:
      m_refTreeModel = Gtk::ListStore::create(m_Columns);
      set_model(m_refTreeModel);

      //Fill the TreeView's model
      Gtk::TreeModel::Row row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 1;
      row[m_Columns.m_col_name] = "right-click on this";

      row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 2;
      row[m_Columns.m_col_name] = "or this";

      row = *(m_refTreeModel->append());
      row[m_Columns.m_col_id] = 3;
      row[m_Columns.m_col_name] = "or this, for a popup context menu";

      //Add the TreeView's view columns:
      append_column("ID", m_Columns.m_col_id);
      append_column("Name", m_Columns.m_col_name);

      //Fill popup menu:
      {
        Gtk::Menu::MenuList& menulist = m_Menu_Popup.items();

        menulist.push_back( Gtk::Menu_Helpers::MenuElem("_Edit",
          sigc::mem_fun(*this, &TreeView_WithPopup::on_menu_file_popup_generic) ) );
        menulist.push_back( Gtk::Menu_Helpers::MenuElem("_Process",
          sigc::mem_fun(*this, &TreeView_WithPopup::on_menu_file_popup_generic) ) );
        menulist.push_back( Gtk::Menu_Helpers::MenuElem("_Remove",
          sigc::mem_fun(*this, &TreeView_WithPopup::on_menu_file_popup_generic) ) );
      }
      m_Menu_Popup.accelerate(*this);
    }

    TreeView_WithPopup::~TreeView_WithPopup()
    {
    }

    bool TreeView_WithPopup::on_button_press_event(GdkEventButton* event)
    {
      //Call base class, to allow normal handling,
      //such as allowing the row to be selected by the right-click:
      bool return_value = TreeView::on_button_press_event(event);

      //Then do our custom stuff:
      if( (event->type == GDK_BUTTON_PRESS) && (event->button == 3) )
      {
        m_Menu_Popup.popup(event->button, event->time);
      }

      return return_value;
    }

    void TreeView_WithPopup::on_menu_file_popup_generic()
    {
      std::cout << "A popup menu item was selected." << std::endl;

      Glib::RefPtr<Gtk::TreeView::Selection> refSelection = get_selection();
      if(refSelection)
      {
        Gtk::TreeModel::iterator iter = refSelection->get_selected();
        if(iter)
        {
          int id = (*iter)[m_Columns.m_col_id];
          std::cout << "  Selected ID=" << id << std::endl;
        }
      }
    }

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