/*
 * A "hello world" program for an InterViews button.
 */

#include <stdio.h>
#include <InterViews/button.h>
#include <InterViews/world.h>


/*
 * To add a button to an interface, first declare a new class that is a
 * subclass of InterViews' PushButton class.
 */
class HelloButton : public PushButton {
  public:
    HelloButton(const char* label, ButtonState* bs, int flag) :
        PushButton(label, bs, flag) {};
  protected:
    void Press();
};

/*
 * To make something happen when the button is pressed, implement the virtual
 * Press function.
 */
void HelloButton::Press() {
    printf("Hello world.\n");
}


/*
 * Now build a standard InterViews application program.  In order to build a
 * new button, the constructor must be supplied its name, a button state
 * object, and an initial state value.  The name is the string that will appear
 * inside the button.  For now, we don't need to worry about the button state
 * and initial value, so we'll just supply dummy values for these.
 */
main() {
    World* world = new World;
    ButtonState* dummyState = new ButtonState;

    world->InsertApplication(
        new HelloButton("Hello Button", dummyState, true));
                                     /* ^^^^^^^^^^^^^^^^ standard for now */

    world->Run();

    delete world;
    return 0;
}