Want to programatically activate a gtkmm columnview but when I set up the handler and then call the activate() member it does not invoke the handler. I have modified a simple example of the columnview class as per the gtkmm examples. The header file is below:
#ifndef GTKMM_EXAMPLEWINDOW_H
#define GTKMM_EXAMPLEWINDOW_H
#include <gtkmm.h>
class ExampleWindow : public Gtk::Window
{
public:
ExampleWindow();
~ExampleWindow() override;
protected:
// Signal handlers:
void on_button_quit();
void on_setup_label(const Glib::RefPtr<Gtk::ListItem>& list_item, Gtk::Align halign);
void on_setup_progressbar(const Glib::RefPtr<Gtk::ListItem>& list_item);
void on_bind_id(const Glib::RefPtr<Gtk::ListItem>& list_item);
void on_bind_name(const Glib::RefPtr<Gtk::ListItem>& list_item);
void on_bind_number(const Glib::RefPtr<Gtk::ListItem>& list_item);
void on_bind_percentage(const Glib::RefPtr<Gtk::ListItem>& list_item);
void on_columnview_activate(guint position);
// A Gio::ListStore item.
class ModelColumns : public Glib::Object
{
public:
unsigned int m_col_id;
Glib::ustring m_col_name;
short m_col_number;
int m_col_percentage;
static Glib::RefPtr<ModelColumns> create(unsigned int col_id,
const Glib::ustring& col_name, short col_number, int col_percentage)
{
return Glib::make_refptr_for_instance<ModelColumns>(
new ModelColumns(col_id, col_name, col_number, col_percentage));
}
protected:
ModelColumns(unsigned int col_id, const Glib::ustring& col_name,
short col_number, int col_percentage)
: m_col_id(col_id), m_col_name(col_name), m_col_number(col_number),
m_col_percentage(col_percentage)
{}
}; // ModelColumns
// Child widgets:
Gtk::Box m_VBox;
Gtk::ScrolledWindow m_ScrolledWindow;
Gtk::ColumnView m_ColumnView;
Gtk::Box m_ButtonBox;
Gtk::Button m_Button_Quit;
Glib::RefPtr<Gio::ListStore<ModelColumns>> m_ListStore;
};
#endif //GTKMM_EXAMPLEWINDOW_H
The cpp file is below:
#include "examplewindow.h"
ExampleWindow::ExampleWindow()
: m_VBox(Gtk::Orientation::VERTICAL),
m_Button_Quit("Quit")
{
set_title("Gtk::ColumnView (Gio::ListStore) example");
set_default_size(500, 250);
m_VBox.set_margin(5);
set_child(m_VBox);
// Add the ColumnView, inside a ScrolledWindow, with the button underneath:
m_ScrolledWindow.set_child(m_ColumnView);
// 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 List model:
m_ListStore = Gio::ListStore<ModelColumns>::create();
m_ListStore->append(ModelColumns::create(1, "Billy Bob", 10, 15));
m_ListStore->append(ModelColumns::create(2, "Joey Jojo", 20, 40));
m_ListStore->append(ModelColumns::create(3, "Rob McRoberts", 30, 70));
// Set list model and selection model.
auto selection_model = Gtk::SingleSelection::create(m_ListStore);
selection_model->set_autoselect(false);
selection_model->set_can_unselect(true);
m_ColumnView.set_model(selection_model);
m_ColumnView.add_css_class("data-table"); // high density table
// Make the columns reorderable.
// This is not necessary, but it's nice to show the feature.
m_ColumnView.set_reorderable(true);
// Add the ColumnView's columns:
// Id column
auto factory = Gtk::SignalListItemFactory::create();
factory->signal_setup().connect(sigc::bind(sigc::mem_fun(*this,
&ExampleWindow::on_setup_label), Gtk::Align::END));
factory->signal_bind().connect(
sigc::mem_fun(*this, &ExampleWindow::on_bind_id));
auto column = Gtk::ColumnViewColumn::create("ID", factory);
m_ColumnView.append_column(column);
// Name column
factory = Gtk::SignalListItemFactory::create();
factory->signal_setup().connect(sigc::bind(sigc::mem_fun(*this,
&ExampleWindow::on_setup_label), Gtk::Align::START));
factory->signal_bind().connect(
sigc::mem_fun(*this, &ExampleWindow::on_bind_name));
column = Gtk::ColumnViewColumn::create("Name", factory);
m_ColumnView.append_column(column);
// Number column
factory = Gtk::SignalListItemFactory::create();
factory->signal_setup().connect(sigc::bind(sigc::mem_fun(*this,
&ExampleWindow::on_setup_label), Gtk::Align::END));
factory->signal_bind().connect(
sigc::mem_fun(*this, &ExampleWindow::on_bind_number));
column = Gtk::ColumnViewColumn::create("Formatted number", factory);
m_ColumnView.append_column(column);
// Percentage column
factory = Gtk::SignalListItemFactory::create();
factory->signal_setup().connect(
sigc::mem_fun(*this, &ExampleWindow::on_setup_progressbar));
factory->signal_bind().connect(
sigc::mem_fun(*this, &ExampleWindow::on_bind_percentage));
column = Gtk::ColumnViewColumn::create("Some percentage", factory);
m_ColumnView.append_column(column);
m_ColumnView.signal_activate().connect(
sigc::mem_fun(
*this,
&ExampleWindow::on_columnview_activate
)
);
m_ColumnView.activate();
printf("After columnview activate called.\n");
}
ExampleWindow::~ExampleWindow()
{
}
void ExampleWindow::on_button_quit()
{
set_visible(false);
}
void ExampleWindow::on_columnview_activate(guint position)
{
printf("Columnview activate routine called for row %d.\n", position);
}
void ExampleWindow::on_setup_label(
const Glib::RefPtr<Gtk::ListItem>& list_item, Gtk::Align halign)
{
list_item->set_child(*Gtk::make_managed<Gtk::Label>("", halign));
}
void ExampleWindow::on_setup_progressbar(
const Glib::RefPtr<Gtk::ListItem>& list_item)
{
auto progressbar = Gtk::make_managed<Gtk::ProgressBar>();
progressbar->set_show_text(true);
list_item->set_child(*progressbar);
}
void ExampleWindow::on_bind_id(const Glib::RefPtr<Gtk::ListItem>& list_item)
{
auto col = std::dynamic_pointer_cast<ModelColumns>(list_item->get_item());
if (!col)
return;
auto label = dynamic_cast<Gtk::Label*>(list_item->get_child());
if (!label)
return;
label->set_text(Glib::ustring::format(col->m_col_id));
}
void ExampleWindow::on_bind_name(const Glib::RefPtr<Gtk::ListItem>& list_item)
{
auto col = std::dynamic_pointer_cast<ModelColumns>(list_item->get_item());
if (!col)
return;
auto label = dynamic_cast<Gtk::Label*>(list_item->get_child());
if (!label)
return;
label->set_text(col->m_col_name);
}
void ExampleWindow::on_bind_number(const Glib::RefPtr<Gtk::ListItem>& list_item)
{
auto col = std::dynamic_pointer_cast<ModelColumns>(list_item->get_item());
if (!col)
return;
auto label = dynamic_cast<Gtk::Label*>(list_item->get_child());
if (!label)
return;
// 10 digits, using leading zeroes.
label->set_text(Glib::ustring::sprintf("%010d", col->m_col_number));
}
void ExampleWindow::on_bind_percentage(const Glib::RefPtr<Gtk::ListItem>& list_item)
{
auto col = std::dynamic_pointer_cast<ModelColumns>(list_item->get_item());
if (!col)
return;
auto progressbar = dynamic_cast<Gtk::ProgressBar*>(list_item->get_child());
if (!progressbar)
return;
progressbar->set_fraction(col->m_col_percentage * 0.01);
}
If I double click on a row then the activate handler will be called, but not when I call activate() manually. I have been converting from gtkmm 4.8 to 4.10 and in the past could use a treeview but is now deprecated. Activating a treeview via code worked in the past.
- Created simple example as per forum request.
- Compiled and ran code and only works as discussed above.
