示例

#ifndef GTKMM_EXAMPLEWINDOW_H
#define GTKMM_EXAMPLEWINDOW_H

#include <gtkmm.h>

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

protected:
  //Signal handlers:
  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_number); add(m_col_percentage);}

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

  ModelColumns m_Columns;

  //Child widgets:
  Gtk::Box m_VBox;

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

  Gtk::Box m_ButtonBox;
  Gtk::Button m_Button_Quit;
};

#endif //GTKMM_EXAMPLEWINDOW_H

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

int main(int argc, char *argv[])
{
  auto app = Gtk::Application::create("org.gtkmm.example");

  //Shows the window and returns when it is closed.
  return app->make_window_and_run<ExampleWindow>(argc, argv);
}

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

ExampleWindow::ExampleWindow()
: m_VBox(Gtk::Orientation::VERTICAL),
  m_Button_Quit("Quit")
{
  set_title("Gtk::TreeView (ListStore) example");
  set_default_size(400, 200);

  m_VBox.set_margin(5);
  set_child(m_VBox);

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

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

  m_VBox.append(m_ScrolledWindow);
  m_VBox.append(m_ButtonBox);

  m_ButtonBox.append(m_Button_Quit);
  m_ButtonBox.set_margin(5);
  m_Button_Quit.set_hexpand(true);
  m_Button_Quit.set_halign(Gtk::Align::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
  auto row = *(m_refTreeModel->append());
  row[m_Columns.m_col_id] = 1;
  row[m_Columns.m_col_name] = "Billy Bob";
  row[m_Columns.m_col_number] = 10;
  row[m_Columns.m_col_percentage] = 15;

  row = *(m_refTreeModel->append());
  row[m_Columns.m_col_id] = 2;
  row[m_Columns.m_col_name] = "Joey Jojo";
  row[m_Columns.m_col_number] = 20;
  row[m_Columns.m_col_percentage] = 40;

  row = *(m_refTreeModel->append());
  row[m_Columns.m_col_id] = 3;
  row[m_Columns.m_col_name] = "Rob McRoberts";
  row[m_Columns.m_col_number] = 30;
  row[m_Columns.m_col_percentage] = 70;

  //Add the TreeView's view columns:
  //This number will be shown with the default numeric formatting.
  m_TreeView.append_column("ID", m_Columns.m_col_id);
  m_TreeView.append_column("Name", m_Columns.m_col_name);

  m_TreeView.append_column_numeric("Formatted number", m_Columns.m_col_number,
          "%010d" /* 10 digits, using leading zeroes. */);

  //Display a progress bar instead of a decimal number:
  auto cell = Gtk::make_managed<Gtk::CellRendererProgress>();
  int cols_count = m_TreeView.append_column("Some percentage", *cell);
  auto pColumn = m_TreeView.get_column(cols_count - 1);
  if(pColumn)
  {
    pColumn->add_attribute(cell->property_value(), m_Columns.m_col_percentage);
  }

  //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++)
  {
    auto column = m_TreeView.get_column(i);
    column->set_reorderable();
  }
}

ExampleWindow::~ExampleWindow()
{
}

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

#ifndef GTKMM_EXAMPLEWINDOW_H
#define GTKMM_EXAMPLEWINDOW_H

#include <gtkmm.h>

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

protected:
  //Signal handlers:
  void on_button_quit();
  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::Box m_VBox;

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

  Gtk::Box m_ButtonBox;
  Gtk::Button m_Button_Quit;
};

#endif //GTKMM_EXAMPLEWINDOW_H

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

int main(int argc, char *argv[])
{
  auto app = Gtk::Application::create("org.gtkmm.example");

  //Shows the window and returns when it is closed.
  return app->make_window_and_run<ExampleWindow>(argc, argv);
}

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

ExampleWindow::ExampleWindow()
: m_VBox(Gtk::Orientation::VERTICAL),
  m_Button_Quit("Quit")
{
  set_title("Gtk::TreeView (TreeStore) example");
  set_default_size(400, 200);

  m_VBox.set_margin(5);
  set_child(m_VBox);

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

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

  m_VBox.append(m_ScrolledWindow);
  m_VBox.append(m_ButtonBox);

  m_ButtonBox.append(m_Button_Quit);
  m_ButtonBox.set_margin(5);
  m_Button_Quit.set_hexpand(true);
  m_Button_Quit.set_halign(Gtk::Align::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
  auto row = *(m_refTreeModel->append());
  row[m_Columns.m_col_id] = 1;
  row[m_Columns.m_col_name] = "Billy Bob";

  auto 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) );
}

ExampleWindow::~ExampleWindow()
{
}

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

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

#ifndef GTKMM_EXAMPLEWINDOW_H
#define GTKMM_EXAMPLEWINDOW_H

#include <gtkmm.h>

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

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

  void treeviewcolumn_validated_on_cell_data(Gtk::CellRenderer* renderer, const Gtk::TreeModel::const_iterator& iter);
  void cellrenderer_validated_on_editing_started(Gtk::CellEditable* cell_editable, const Glib::ustring& path);
  void cellrenderer_validated_on_edited(const Glib::ustring& path_string, const Glib::ustring& new_text);
  void on_message_response(int response_id, Gtk::MessageDialog* dialog);

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

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

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

  ModelColumns m_Columns;

  //Child widgets:
  Gtk::Box m_VBox;

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

  Gtk::Box m_ButtonBox;
  Gtk::Button m_Button_Quit;

  //For the validated column:
  //You could also use a CellRendererSpin or a CellRendererProgress:
  Gtk::CellRendererText m_cellrenderer_validated;
  Gtk::TreeView::Column m_treeviewcolumn_validated;
  bool m_validate_retry;
  Glib::ustring m_invalid_text_for_retry;
};

#endif //GTKMM_EXAMPLEWINDOW_H

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

int main(int argc, char *argv[])
{
  auto app = Gtk::Application::create("org.gtkmm.example");

  //Shows the window and returns when it is closed.
  return app->make_window_and_run<ExampleWindow>(argc, argv);
}

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

using std::sprintf;
using std::strtol;

ExampleWindow::ExampleWindow()
: m_VBox(Gtk::Orientation::VERTICAL),
  m_Button_Quit("Quit"),
  m_validate_retry(false)
{
  set_title("Gtk::TreeView Editable Cells example");
  set_default_size(400, 200);

  m_VBox.set_margin(5);
  set_child(m_VBox);

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

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

  m_VBox.append(m_ScrolledWindow);
  m_VBox.append(m_ButtonBox);

  m_ButtonBox.append(m_Button_Quit);
  m_ButtonBox.set_margin(5);
  m_Button_Quit.set_hexpand(true);
  m_Button_Quit.set_halign(Gtk::Align::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
  auto 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_Columns.m_col_number] = 10;

  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_Columns.m_col_number] = 20;

  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;
  row[m_Columns.m_col_number] = 30;

  //Add the TreeView's view columns:
  //We use the *_editable convenience methods for most of these,
  //because the default functionality is enough:
  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);
  m_TreeView.append_column_numeric_editable("foo", m_Columns.m_col_number,
          "%010d");


  //For this column, we create the CellRenderer ourselves, and connect our own
  //signal handlers, so that we can validate the data that the user enters, and
  //control how it is displayed.
  m_treeviewcolumn_validated.set_title("validated (&lt;10)");
  m_treeviewcolumn_validated.pack_start(m_cellrenderer_validated);
  m_TreeView.append_column(m_treeviewcolumn_validated);

  //Tell the view column how to render the model values:
  m_treeviewcolumn_validated.set_cell_data_func(m_cellrenderer_validated,
          sigc::mem_fun(*this,
              &ExampleWindow::treeviewcolumn_validated_on_cell_data) );

  //Make the CellRenderer editable, and handle its editing signals:
  m_cellrenderer_validated.property_editable() = true;

  m_cellrenderer_validated.signal_editing_started().connect(
          sigc::mem_fun(*this,
        &ExampleWindow::cellrenderer_validated_on_editing_started) );

  m_cellrenderer_validated.signal_edited().connect( sigc::mem_fun(*this,
              &ExampleWindow::cellrenderer_validated_on_edited) );

  //If this was a CellRendererSpin then you would have to set the adjustment:
  //m_cellrenderer_validated.property_adjustment() = m_spin_adjustment;
}

ExampleWindow::~ExampleWindow()
{
}

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

void ExampleWindow::treeviewcolumn_validated_on_cell_data(
        Gtk::CellRenderer* /* renderer */,
        const Gtk::TreeModel::const_iterator& iter)
{
  //Get the value from the model and show it appropriately in the view:
  if(iter)
  {
    const auto row = *iter;
    int model_value = row[m_Columns.m_col_number_validated];

    //This is just an example.
    //In this case, it would be easier to use append_column_editable() or
    //append_column_numeric_editable()
    char buffer[32];
    sprintf(buffer, "%d", model_value);

    auto view_text = buffer;
    m_cellrenderer_validated.property_text() = view_text;
  }
}

void ExampleWindow::cellrenderer_validated_on_editing_started(
        Gtk::CellEditable* cell_editable, const Glib::ustring& /* path */)
{
  //Start editing with previously-entered (but invalid) text,
  //if we are allowing the user to correct some invalid data.
  if(m_validate_retry)
  {
    //This is the CellEditable inside the CellRenderer.
    auto celleditable_validated = cell_editable;

    //It's usually an Entry, at least for a CellRendererText:
    auto pEntry = dynamic_cast<Gtk::Entry*>(celleditable_validated);
    if(pEntry)
    {
      pEntry->set_text(m_invalid_text_for_retry);
      m_validate_retry = false;
      m_invalid_text_for_retry.clear();
    }
  }
}

void ExampleWindow::cellrenderer_validated_on_edited(
        const Glib::ustring& path_string,
        const Glib::ustring& new_text)
{
  Gtk::TreePath path(path_string);

  //Convert the inputed text to an integer, as needed by our model column:
  char* pchEnd = nullptr;
  int new_value = strtol(new_text.c_str(), &pchEnd, 10);

  if(new_value >= 10)
  {
    //Prevent entry of numbers higher than 10.

    //Tell the user:
    auto dialog = new Gtk::MessageDialog(*this,
            "The number must be less than 10. Please try again.",
            false, Gtk::MessageType::ERROR, Gtk::ButtonsType::OK, true /* modal */);
    dialog->signal_response().connect(sigc::bind(
      sigc::mem_fun(*this, &ExampleWindow::on_message_response), dialog));

    dialog->show();

    //Start editing again, with the bad text, so that the user can correct it.
    //A real application should probably allow the user to revert to the
    //previous text.

    //Set the text to be used in the start_editing signal handler:
    m_invalid_text_for_retry = new_text;
    m_validate_retry = true;

    //Start editing again, when the message dialog has been closed:
    m_TreeView.set_cursor(path, m_treeviewcolumn_validated,
            m_cellrenderer_validated, true /* start_editing */);
  }
  else
  {
    //Get the row from the path:
    auto iter = m_refTreeModel->get_iter(path);
    if(iter)
    {
      auto row = *iter;

      //Put the new value in the model:
      row[m_Columns.m_col_number_validated] = new_value;
    }
  }
}

void ExampleWindow::on_message_response(int /* response_id */, Gtk::MessageDialog* dialog)
{
  delete dialog;
}

#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:
  void on_button_quit();


  //Child widgets:
  Gtk::Box m_VBox;

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

  Gtk::Box m_ButtonBox;
  Gtk::Button m_Button_Quit;
};

#endif //GTKMM_EXAMPLEWINDOW_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:
  bool row_draggable_vfunc(const Gtk::TreeModel::Path& path) const override;
  bool row_drop_possible_vfunc(const Gtk::TreeModel::Path& dest, const Glib::ValueBase& value) const override;
};

#endif //GTKMM_EXAMPLE_TREEMODEL_DND_H

#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::make_refptr_for_instance<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:

  const const_iterator iter = get_iter(path);
  if(iter)
  {
    ConstRow 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 Glib::ValueBase& value) 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:
  auto 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:
    const const_iterator iter_dest_parent = get_iter(dest_parent);
    if(iter_dest_parent)
    {
      ConstRow 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 value)
  // if you must look at both rows to see whether a drop should be allowed.
  // You could use
  //   Glib::RefPtr<const Gtk::TreeModel> model_dragged_row;
  //   Gtk::TreeModel::Path path_dragged_row;
  //   Gtk::TreeModel::Path::get_row_drag_data(value,
  //     model_dragged_row, path_dragged_row);

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

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

int main(int argc, char *argv[])
{
  auto app = Gtk::Application::create("org.gtkmm.example");

  //Shows the window and returns when it is closed.
  return app->make_window_and_run<ExampleWindow>(argc, argv);
}

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

ExampleWindow::ExampleWindow()
: m_VBox(Gtk::Orientation::VERTICAL),
  m_Button_Quit("_Quit", true)
{
  set_title("Gtk::TreeView (Drag and Drop) example");
  set_default_size(400, 200);

  m_VBox.set_margin(5);
  set_child(m_VBox);

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

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

  m_VBox.append(m_ScrolledWindow);
  m_VBox.append(m_ButtonBox);

  m_ButtonBox.append(m_Button_Quit);
  m_ButtonBox.set_margin(5);
  m_Button_Quit.set_hexpand(true);
  m_Button_Quit.set_halign(Gtk::Align::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:
  //The columns are declared in the overridden TreeModel.
  m_refTreeModel = TreeModel_Dnd::create();
  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
  auto 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;

  auto 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);
}

ExampleWindow::~ExampleWindow()
{
}

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

#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:
  void on_button_quit();



  //Child widgets:
  Gtk::Box m_VBox;

  Gtk::ScrolledWindow m_ScrolledWindow;
  TreeView_WithPopup m_TreeView;

  Gtk::Box m_ButtonBox;
  Gtk::Button m_Button_Quit;
};

#endif //GTKMM_EXAMPLEWINDOW_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:
  // Signal handler for showing popup menu:
  void on_popup_button_pressed(int n_press, double x, double y);

  //Signal handler for popup menu items:
  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::PopoverMenu m_MenuPopup;
};

#endif //GTKMM_EXAMPLE_TREEVIEW_WITHPOPUP_H

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

int main(int argc, char *argv[])
{
  auto app = Gtk::Application::create("org.gtkmm.example");

  //Shows the window and returns when it is closed.
  return app->make_window_and_run<ExampleWindow>(argc, argv);
}

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

ExampleWindow::ExampleWindow()
: m_VBox(Gtk::Orientation::VERTICAL),
  m_Button_Quit("Quit")
{
  set_title("Gtk::TreeView (ListStore) example");
  set_default_size(400, 200);

  m_VBox.set_margin(5);
  set_child(m_VBox);

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

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

  m_VBox.append(m_ScrolledWindow);
  m_VBox.append(m_ButtonBox);

  m_ButtonBox.append(m_Button_Quit);
  m_ButtonBox.set_margin(5);
  m_Button_Quit.set_hexpand(true);
  m_Button_Quit.set_halign(Gtk::Align::END);
  m_Button_Quit.signal_clicked().connect( sigc::mem_fun(*this,
              &ExampleWindow::on_button_quit) );
}

ExampleWindow::~ExampleWindow()
{
}

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

#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
  auto 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);

  // Catch button press events:
  auto refGesture = Gtk::GestureClick::create();
  refGesture->set_button(GDK_BUTTON_SECONDARY);
  refGesture->signal_pressed().connect(
    sigc::mem_fun(*this, &TreeView_WithPopup::on_popup_button_pressed));
  add_controller(refGesture);

  // Fill popup menu:
  auto gmenu = Gio::Menu::create();
  gmenu->append("_Edit", "popup.edit");
  gmenu->append("_Process", "popup.process");
  gmenu->append("_Remove", "popup.remove");

  m_MenuPopup.set_parent(*this);
  m_MenuPopup.set_menu_model(gmenu);
  m_MenuPopup.set_has_arrow(false);

  // Create actions:
  auto refActionGroup = Gio::SimpleActionGroup::create();

  refActionGroup->add_action("edit",
    sigc::mem_fun(*this, &TreeView_WithPopup::on_menu_file_popup_generic));
  refActionGroup->add_action("process",
    sigc::mem_fun(*this, &TreeView_WithPopup::on_menu_file_popup_generic));
  refActionGroup->add_action("remove",
    sigc::mem_fun(*this, &TreeView_WithPopup::on_menu_file_popup_generic));

  insert_action_group("popup", refActionGroup);
}

TreeView_WithPopup::~TreeView_WithPopup()
{
}

void TreeView_WithPopup::on_popup_button_pressed(int /* n_press */, double x, double y)
{
  const Gdk::Rectangle rect(x, y, 1, 1);
  m_MenuPopup.set_pointing_to(rect);
  m_MenuPopup.popup();
}

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

  auto refSelection = get_selection();
  if(refSelection)
  {
    auto iter = refSelection->get_selected();
    if(iter)
    {
      int id = (*iter)[m_Columns.m_col_id];
      std::cout << "  Selected ID=" << id << std::endl;
    }
  }
}