Программирование с gtkmm (Главы 6-7)

Programming with gtkmm (Chapters 6-7)

Chapter 6. Miscellaneous Widgets

6.1. Label
Labels are the main method of placing non-editable text in windows, for instance to place a title next to a
Entry widget. You can specify the text in the constructor, or with the set_text() method.

The width of the label will be adjusted automatically. You can produce multi-line labels by putting line
breaks ("\n") in the label string.

The label text can be justified using the set_justify() method. The widget is also capable of
word-wrapping - this can be activated with set_line_wrap().

TODO: gtkmm2: markup.
Reference (../../reference/html/classGtk_1_1Label.html)

6.1.1. Example
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 Frame section.)

Source Code (../../../examples/book/label)

File: examplewindow.h
#ifndef GTKMM_EXAMPLEWINDOW_H
#define GTKMM_EXAMPLEWINDOW_H
#include <gtkmm.h>

class ExampleWindow : public Gtk::Window
{
public:
ExampleWindow();
virtual ~ExampleWindow();
protected:
//Child widgets:
Gtk::HBox m_HBox;
Gtk::VBox 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

File: main.cc
#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;
}

File: examplewindow.cc

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

ExampleWindow::ExampleWindow()
:
m_HBox(false, 5),
m_VBox(false, 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\n"
"Multi-line label.\nFourth line, (j/k)"),
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);