wastetimewindow.cc

Developing with Gnome一书examples例子代码

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

using namespace std;

WasteTimeWindow::WasteTimeWindow(
  BaseObjectType* base_object,
  const Glib::RefPtr<Gnome::Glade::Xml>& glade_xml)
  : Gtk::Window(base_object)
{
  // Get the progress bar widget and change it to "activity mode",
  // i.e. a block that bounces back and forth instead of a normal
  // progress bar that fills to completion.
  glade_xml->get_widget("Progress Bar", d_progress_bar);
  // d_progress_bar = 
  //   dynamic_cast<Gtk::ProgressBar*>(what_a_waste->get_widget("Progress Bar"));
  d_progress_bar->pulse();

  // Add a timeout to update the progress bar every 100 milliseconds or so
  d_timeout_function_connection = Glib::signal_timeout().connect(
    sigc::mem_fun(*this, &WasteTimeWindow::update_progress_bar),
    100);
}

WasteTimeWindow::~WasteTimeWindow()
{
  d_timeout_function_connection.disconnect();
}

bool
WasteTimeWindow::on_delete_event(GdkEventAny* event)
{
  // Tell the user how much time they used
  cout << "You wasted " << d_wasted_time_tracker.elapsed()
       << " seconds with this program." << endl;

  // Calling hide() on an object that was passed to Gtk::Main::Run() causes
  // Gtk:Main::Quit() to be called.
  hide();

  // No other handlers need be called...
  return true;
}

bool
WasteTimeWindow::update_progress_bar()
{
  d_progress_bar->pulse();

  // Return true so the function will be called again; returning false removes
  // this timeout function.
  return true;
}