Event handler for nocl::Button events. More...

#include <ButtonHandler.hpp>

Inheritance diagram for nocl::ButtonHandler:

Collaboration diagram for nocl::ButtonHandler:

Public Member Functions
virtual	~ButtonHandler (void)
	Destructor. More...

	ButtonHandler (void)
	Constructor. More...

virtual ButtonHandler &	handle_button_events_for (Button &button)
	Call this method for every button that needs a callback. More...

virtual void	clicked (Button &button)=0
	Override this pure virtual in your class. More...

Detailed Description

Event handler for nocl::Button events.

For example:

#include <nocl/nocl.hpp>
/* This example shows how to create a nocl::TextButton
 * and a nocl::ButtonHandler to handle button clicks.
 */
class MyApp : public nocl::Application, public nocl::ButtonHandler
{
    public:
    /* Note how we inherit from nocl::ButtonHandler and call
     * handle_button_events_for() to indicate an interest in
     * button events.
     */
    virtual MyApp & initialize(void) override
    {
        ok_button.label("OK");
        button_box.add_child(ok_button);
        handle_button_events_for(ok_button);
        frame_window.initialize(*this, "Testing");
        frame_window.add_child(button_box);
        frame_window.show_all();
        return *this;
    }
    /* This method is inherited from nocl::ButtonHandler.  You must
     * override it to receive a callback when the button is clicked.
     */
    virtual void clicked(nocl::Button & button) override
    {
        std::cout << "button was clicked!" << std::endl;
    }
    nocl::FrameWindow   frame_window;
    nocl::ButtonBox     button_box;
    nocl::TextButton    ok_button;
};
int main()
{
    MyApp app;
    return app.run_message_loop();
}

See also: https://developer.gnome.org/gtk3/stable/GtkButton.html#GtkButton.signals

Constructor & Destructor Documentation

◆ ~ButtonHandler()

nocl::ButtonHandler::~ButtonHandler ( void )

virtual

Destructor.

◆ ButtonHandler()

nocl::ButtonHandler::ButtonHandler ( void )

Constructor.

Member Function Documentation

◆ handle_button_events_for()

nocl::ButtonHandler & nocl::ButtonHandler::handle_button_events_for ( Button & button )

virtual

Call this method for every button that needs a callback.

The clicked() method will be called when button is clicked.

Exceptions

nocl::Exception	Throws if the Gtk+ widget does not map to a NOCL GUI component.
nocl::Exception	Throws if the NOCL GUI component is not a nocl::Button.

References clicked(), nocl::GUIComponent::gtk_widget, NOCL_WHERE, and nocl::GUIComponent::widget_to_gui_component_map().

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◆ clicked()

void nocl::ButtonHandler::clicked ( Button & button )

pure virtual

Override this pure virtual in your class.

Referenced by handle_button_events_for().

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The documentation for this class was generated from the following files: