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<div class="chapter">
<div class="titlepage"><div><div><h1 class="title">
<a name="chapter-misc-widgets"></a>Chapter 7. Miscellaneous Widgets</h1></div></div></div>
<div class="toc">
<p><b>Table of Contents</b></p>
<ul class="toc">
<li><span class="sect1"><a href="chapter-misc-widgets.html#sec-labels">Label</a></span></li>
<li><span class="sect1"><a href="sec-text-entry.html">Entry</a></span></li>
<li><span class="sect1"><a href="sec-spinbutton.html">SpinButton</a></span></li>
<li><span class="sect1"><a href="sec-progressbar.html">ProgressBar</a></span></li>
<li><span class="sect1"><a href="sec-infobar.html">InfoBar</a></span></li>
<li><span class="sect1"><a href="sec-tooltips.html">Tooltips</a></span></li>
</ul>
</div>
<div class="sect1">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="sec-labels"></a>Label</h2></div></div></div>
<p>
Labels are the main method of placing non-editable text in windows, for
instance to place a title next to a <code class="classname">Entry</code> widget. You
can specify the text in the constructor, or later with the
<code class="methodname">set_text()</code> or <code class="methodname">set_markup()</code> methods.
</p>
<p>
The width of the label will be adjusted automatically. You can produce multi-line labels by putting line breaks ("\n") in the label string.
</p>
<p>
The label text can be justified using the <code class="methodname">set_justify()</code>
method. The widget is also capable of word-wrapping, which can be activated
with <code class="methodname">set_line_wrap()</code>.
</p>
<p>
Gtk::Label support some simple formatting, for instance allowing you to make some
text bold, colored, or larger. You can do this by providing a string to
<code class="methodname">set_markup()</code>, using the <a class="ulink" href="http://developer.gnome.org/pango/unstable/PangoMarkupFormat.html" target="_top">Pango Markup syntax</a>. For instance,
<code class="code">
<b>bold text</b> and <s>strikethrough text</s>
</code>
.</p>
<p><a class="ulink" href="http://developer.gnome.org/gtkmm/3.24/classGtk_1_1Label.html" target="_top">Reference</a></p>
<div class="sect2">
<div class="titlepage"><div><div><h3 class="title">
<a name="label-example"></a>Example</h3></div></div></div>
<p>
Below is a short example to illustrate these functions. This example
makes use of the Frame widget to better demonstrate the label styles.
(The Frame widget is explained in the <a class="link" href="chapter-container-widgets.html#sec-frame" title="Frame">Frame</a> section.)
It is possible that the first character in <code class="literal">m_Label_Normal</code> is shown
underlined only when you press the <span class="keycap"><strong>Alt</strong></span> key.
</p>
<div class="figure">
<a name="figure-label"></a><p class="title"><b>Figure 7.1. Label</b></p>
<div class="figure-contents"><div class="screenshot"><div><img src="figures/label.png" alt="Label"></div></div></div>
</div>
<br class="figure-break"><p><a class="ulink" href="http://git.gnome.org/browse/gtkmm-documentation/tree/examples/book/label?h=gtkmm-3-24" target="_top">Source Code</a></p>
<p>File: <code class="filename">examplewindow.h</code> (For use with gtkmm 3, not gtkmm 2)
</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:
//Child widgets:
Gtk::Box m_HBox;
Gtk::Box m_VBox, m_VBox2;
Gtk::Frame m_Frame_Normal, m_Frame_Multi, m_Frame_Left, m_Frame_Right,
m_Frame_LineWrapped, m_Frame_FilledWrapped, m_Frame_Underlined;
Gtk::Label m_Label_Normal, m_Label_Multi, m_Label_Left, m_Label_Right,
m_Label_LineWrapped, m_Label_FilledWrapped, m_Label_Underlined;
};
#endif //GTKMM_EXAMPLEWINDOW_H
</pre>
<p>File: <code class="filename">main.cc</code> (For use with gtkmm 3, not gtkmm 2)
</p>
<pre class="programlisting">
#include "examplewindow.h"
#include <gtkmm/application.h>
int main(int argc, char *argv[])
{
auto app = Gtk::Application::create(argc, argv, "org.gtkmm.example");
ExampleWindow window;
//Shows the window and returns when it is closed.
return app->run(window);
}
</pre>
<p>File: <code class="filename">examplewindow.cc</code> (For use with gtkmm 3, not gtkmm 2)
</p>
<pre class="programlisting">
#include "examplewindow.h"
#include <iostream>
ExampleWindow::ExampleWindow()
:
m_HBox(Gtk::ORIENTATION_HORIZONTAL, 5),
m_VBox(Gtk::ORIENTATION_VERTICAL, 5),
m_VBox2(Gtk::ORIENTATION_VERTICAL, 5),
m_Frame_Normal("Normal Label"),
m_Frame_Multi("Multi-line Label"),
m_Frame_Left("Left Justified Label"),
m_Frame_Right("Right Justified Label"),
m_Frame_LineWrapped("Line wrapped label"),
m_Frame_FilledWrapped("Filled, wrapped label"),
m_Frame_Underlined("Underlined label"),
m_Label_Normal("_This is a Normal label", true),
m_Label_Multi("This is a Multi-line label.\nSecond line\nThird line"),
m_Label_Left("This is a Left-Justified\nMulti-line label.\nThird line"),
m_Label_Right("This is a Right-Justified\nMulti-line label.\nThird line"),
m_Label_Underlined("This label is underlined!\n"
"This one is underlined in quite a funky fashion")
{
set_title("Label");
set_border_width(5);
add(m_HBox);
m_HBox.pack_start(m_VBox, Gtk::PACK_SHRINK);
m_Frame_Normal.add(m_Label_Normal);
m_VBox.pack_start(m_Frame_Normal, Gtk::PACK_SHRINK);
m_Frame_Multi.add(m_Label_Multi);
m_VBox.pack_start(m_Frame_Multi, Gtk::PACK_SHRINK);
m_Label_Left.set_justify(Gtk::JUSTIFY_LEFT);
m_Frame_Left.add(m_Label_Left);
m_VBox.pack_start(m_Frame_Left, Gtk::PACK_SHRINK);
m_Label_Right.set_justify(Gtk::JUSTIFY_RIGHT);
m_Frame_Right.add(m_Label_Right);
m_VBox.pack_start(m_Frame_Right, Gtk::PACK_SHRINK);
m_HBox.pack_start(m_VBox2, Gtk::PACK_SHRINK);
m_Label_LineWrapped.set_text(
"This is an example of a line-wrapped label. It "
/* add a big space to the next line to test spacing */
"should not be taking up the entire "
"width allocated to it, but automatically "
"wraps the words to fit. "
"The time has come, for all good men, to come to "
"the aid of their party. "
"The sixth sheik's six sheep's sick.\n"
" It supports multiple paragraphs correctly, "
"and correctly adds "
"many extra spaces. ");
m_Label_LineWrapped.set_line_wrap();
m_Frame_LineWrapped.add(m_Label_LineWrapped);
m_VBox2.pack_start(m_Frame_LineWrapped, Gtk::PACK_SHRINK);
m_Label_FilledWrapped.set_text(
"This is an example of a line-wrapped, filled label. "
"It should be taking "
"up the entire width allocated to it. "
"Here is a sentence to prove "
"my point. Here is another sentence. "
"Here comes the sun, do de do de do.\n"
" This is a new paragraph.\n"
" This is another newer, longer, better "
"paragraph. It is coming to an end, "
"unfortunately.");
m_Label_FilledWrapped.set_justify(Gtk::JUSTIFY_FILL);
m_Label_FilledWrapped.set_line_wrap();
m_Frame_FilledWrapped.add(m_Label_FilledWrapped);
m_VBox2.pack_start(m_Frame_FilledWrapped, Gtk::PACK_SHRINK);
m_Label_Underlined.set_justify(Gtk::JUSTIFY_LEFT);
m_Label_Underlined.set_pattern (
"_________________________ _ _________ _ ______"
" __ _______ ___");
m_Frame_Underlined.add(m_Label_Underlined);
m_VBox2.pack_start(m_Frame_Underlined, Gtk::PACK_SHRINK);
show_all_children();
}
ExampleWindow::~ExampleWindow()
{
}
</pre>
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