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<div class="chapter" title="Chapter 14. Dialogs">
<div class="titlepage"><div><div><h2 class="title">
<a name="chapter-dialogs"></a>Chapter 14. Dialogs</h2></div></div></div>
<div class="toc">
<p><b>Table of Contents</b></p>
<ul>
<li><span class="sect1"><a href="chapter-dialogs.html#sec-dialogs-messagedialog">MessageDialog</a></span></li>
<li><span class="sect1"><a href="sec-dialogs-filechooserdialog.html">FileChooserDialog</a></span></li>
<li><span class="sect1"><a href="sec-color-selection-dialog.html">ColorSelectionDialog</a></span></li>
<li><span class="sect1"><a href="sec-font-selection-dialog.html">FontSelectionDialog</a></span></li>
</ul>
</div>
<p>
Dialogs are used as secondary windows, to provide specific information or to
ask questions. <code class="classname">Gtk::Dialog</code> windows contain a few pre-packed
widgets to ensure consistency, and a <code class="methodname">run()</code> method which
blocks until the user dismisses the dialog.
</p>
<p>
There are several derived <code class="classname">Dialog</code> classes which you might
find useful. <code class="classname">Gtk::MessageDialog</code> is used for most simple
notifications. But at other times you might need to derive your own dialog
class to provide more complex functionality.
</p>
<p>
To pack widgets into a custom dialog, you should pack them into the
<code class="classname">Gtk::VBox</code>, available via
<code class="methodname">get_vbox()</code>. To just add a <code class="classname">Button</code>
to the bottom of the <code class="classname">Dialog</code>, you could use the
<code class="methodname">add_button()</code> method.
</p>
<p>
The <code class="methodname">run()</code> method returns an <code class="literal">int</code>. This
may be a value from the <code class="literal">Gtk::ResponseType</code> if the user
closed the button by clicking a standard button, or it could be the custom
response value that you specified when using <code class="methodname">add_button()</code>.
</p>
<p><a class="ulink" href="http://library.gnome.org/devel/gtkmm/unstable/classGtk_1_1Dialog.html" target="_top">Reference</a></p>
<div class="sect1" title="MessageDialog">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="sec-dialogs-messagedialog"></a>MessageDialog</h2></div></div></div>
<p>
<code class="classname">MessageDialog</code> is a convenience class, used to create
simple, standard message dialogs, with a message, an icon, and buttons for user
response. You can specify the type of message and the text in the constructor,
as well as specifying standard buttons via the
<code class="literal">Gtk::ButtonsType</code> enum.
</p>
<p><a class="ulink" href="http://library.gnome.org/devel/gtkmm/unstable/classGtk_1_1MessageDialog.html" target="_top">Reference</a></p>
<div class="sect2" title="Example">
<div class="titlepage"><div><div><h3 class="title">
<a name="messagedialog-example"></a>Example</h3></div></div></div>
<div class="figure">
<a name="figure-dialogs-messagedialog"></a><p class="title"><b>Figure 14.1. MessageDialog</b></p>
<div class="figure-contents"><div class="screenshot"><div><img src="figures/dialogs_messagedialog.png" alt="MessageDialog"></div></div></div>
</div>
<br class="figure-break"><p><a class="ulink" href="http://git.gnome.org/cgit/gtkmm-documentation/tree/examples/book/dialogs/messagedialog" target="_top">Source Code</a></p>
<p>File: <code class="filename">examplewindow.h</code>
</p>
<pre class="programlisting">
#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_info_clicked();
void on_button_question_clicked();
//Child widgets:
Gtk::VButtonBox m_ButtonBox;
Gtk::Button m_Button_Info, m_Button_Question;
};
#endif //GTKMM_EXAMPLEWINDOW_H
</pre>
<p>File: <code class="filename">examplewindow.cc</code>
</p>
<pre class="programlisting">
#include "examplewindow.h"
#include <gtkmm/messagedialog.h>
#include <iostream>
ExampleWindow::ExampleWindow()
: m_Button_Info("Show Info MessageDialog"),
m_Button_Question("Show Question MessageDialog")
{
set_title("Gtk::MessageDialog example");
add(m_ButtonBox);
m_ButtonBox.pack_start(m_Button_Info);
m_Button_Info.signal_clicked().connect(sigc::mem_fun(*this,
&ExampleWindow::on_button_info_clicked) );
m_ButtonBox.pack_start(m_Button_Question);
m_Button_Question.signal_clicked().connect(sigc::mem_fun(*this,
&ExampleWindow::on_button_question_clicked) );
show_all_children();
}
ExampleWindow::~ExampleWindow()
{
}
void ExampleWindow::on_button_info_clicked()
{
Gtk::MessageDialog dialog(*this, "This is an INFO MessageDialog");
dialog.set_secondary_text(
"And this is the secondary text that explains things.");
dialog.run();
}
void ExampleWindow::on_button_question_clicked()
{
Gtk::MessageDialog dialog(*this, "This is a QUESTION MessageDialog",
false /* use_markup */, Gtk::MESSAGE_QUESTION,
Gtk::BUTTONS_OK_CANCEL);
dialog.set_secondary_text(
"And this is the secondary text that explains things.");
int result = dialog.run();
//Handle the response:
switch(result)
{
case(Gtk::RESPONSE_OK):
{
std::cout << "OK clicked." << std::endl;
break;
}
case(Gtk::RESPONSE_CANCEL):
{
std::cout << "Cancel clicked." << std::endl;
break;
}
default:
{
std::cout << "Unexpected button clicked." << std::endl;
break;
}
}
}
</pre>
<p>File: <code class="filename">main.cc</code>
</p>
<pre class="programlisting">
#include <gtkmm/main.h>
#include "examplewindow.h"
int main(int argc, char *argv[])
{
Gtk::Main kit(argc, argv);
ExampleWindow window;
//Shows the window and returns when it is closed.
Gtk::Main::run(window);
return 0;
}
</pre>
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distrib
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Mandriva
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2010.0
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i586
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media
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contrib-release
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by-pkgid
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345aa895e80053137c21f8693106c3a0
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files
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18
