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<th width="60%" align="center">Chapter 6. Buttons</th>
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="sec-checkbuttons"></a>CheckButton</h2></div></div></div>
<p>
<code class="classname">Gtk::CheckButton</code> inherits directly from
<code class="classname">Gtk::Widget</code>. It is similar to <code class="classname">Gtk::ToggleButton</code>.
The only real difference between the two is <code class="classname">Gtk::CheckButton</code>'s
appearance. You can check and set a check button using the same
member methods as for <code class="classname">Gtk::ToggleButton</code>.
</p>
<p><a class="ulink" href="https://gnome.pages.gitlab.gnome.org/gtkmm/classGtk_1_1CheckButton.html" target="_top">Reference</a></p>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="checkbutton-example"></a>Example</h3></div></div></div>
<div class="figure">
<a name="figure-checkbutton"></a><p class="title"><b>Figure 6.2. CheckButton</b></p>
<div class="figure-contents">
<div class="screenshot">
<div class="mediaobject"><img src="figures/checkbutton.png" alt="CheckButton"></div>
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<br class="figure-break">
<p><a class="ulink" href="https://gitlab.gnome.org/GNOME/gtkmm-documentation/tree/master/examples/book/buttons/checkbutton" target="_top">Source Code</a></p>
<p>File: <code class="filename">examplewindow.h</code> (For use with gtkmm 4)</p>
<pre class="programlisting"><code class="code">#ifndef GTKMM_EXAMPLE_BUTTONS_H
#define GTKMM_EXAMPLE_BUTTONS_H
#include <gtkmm/window.h>
#include <gtkmm/checkbutton.h>
class ExampleWindow : public Gtk::Window
{
public:
ExampleWindow();
virtual ~ExampleWindow();
protected:
//Signal handlers:
void on_button_toggled();
//Child widgets:
Gtk::CheckButton m_button;
};
#endif //GTKMM_EXAMPLE_BUTTONS_H
</code></pre>
<p>File: <code class="filename">examplewindow.cc</code> (For use with gtkmm 4)</p>
<pre class="programlisting"><code class="code">#include "examplewindow.h"
#include <iostream>
ExampleWindow::ExampleWindow()
: m_button("something")
{
set_title("checkbutton example");
m_button.signal_toggled().connect(sigc::mem_fun(*this,
&ExampleWindow::on_button_toggled) );
m_button.set_margin(10);
set_child(m_button);
}
ExampleWindow::~ExampleWindow()
{
}
void ExampleWindow::on_button_toggled()
{
std::cout << "The Button was toggled: state="
<< (m_button.get_active() ? "true" : "false")
<< std::endl;
}
</code></pre>
<p>File: <code class="filename">main.cc</code> (For use with gtkmm 4)</p>
<pre class="programlisting"><code class="code">#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);
}
</code></pre>
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