Button (按钮)
5.1.1. 构造函数
可以通过两种方式来创建按钮,你可以在 Gtk::Button 构造函数中指定标签字符串,或者以后调用 set_label() 来指定标签。
如果你想为按钮定义一个快捷键,那么可以在标签字符串中的某个字符前面加上一个下划线,并且指定可选的参数助记符(mnemonic)为 true。例如:
Gtk::Button* pButton = new Gtk::Button("_Something", true);
Stock items have been recommended for use in buttons. From gtkmm-3.10 they are deprecated. They should not be used in newly-written code. However, the documentation of namespace Gtk::Stock shows recommended labels and named icons to show in buttons.
Gtk::Button 同时也是一个容器,因此你可以在其中放任何其它的组件,比如放一个 Gtk::Image 在里面。
5.1.2. 示例
这个示例创建了一个有图片和文字标签的按钮。
File: buttons.h (For use with gtkmm 3, not gtkmm 2)
#ifndef GTKMM_EXAMPLE_BUTTONS_H #define GTKMM_EXAMPLE_BUTTONS_H #include <gtkmm/window.h> #include <gtkmm/button.h> class Buttons : public Gtk::Window { public: Buttons(); virtual ~Buttons(); protected: //Signal handlers: void on_button_clicked(); //Child widgets: Gtk::Button m_button; }; #endif //GTKMM_EXAMPLE_BUTTONS_H
File: buttons.cc (For use with gtkmm 3, not gtkmm 2)
#include "buttons.h" #include <iostream> Buttons::Buttons() { m_button.add_pixlabel("info.xpm", "cool button"); set_title("Pixmap'd buttons!"); set_border_width(10); m_button.signal_clicked().connect( sigc::mem_fun(*this, &Buttons::on_button_clicked) ); add(m_button); show_all_children(); } Buttons::~Buttons() { } void Buttons::on_button_clicked() { std::cout << "The Button was clicked." << std::endl; }
File: main.cc (For use with gtkmm 3, not gtkmm 2)
#include "buttons.h" #include <gtkmm/application.h> int main(int argc, char *argv[]) { Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv, "org.gtkmm.example"); Buttons buttons; //Shows the window and returns when it is closed. return app->run(buttons); }