Getting Started

This chapter is idented to get you start programming with the WVL. But before you go through the tutorial you first have to get the WVL installed on your system.

A very simple WVL application.
This will explain the very basic stuff about creating a "Hello world" application with the WVL.
Every WVL application has to include the head file "wvl.h"
#include<wvl/wvl.h>

Every Windows application has an entry function called WinMain()
int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE, char*, int)
{
    return 0;
}

Then, define a Window to be used as a startup window.
class my_first_form: public wvl::form
{
public:
     my_first_form()
     {
        this->text("Hello world");
        this->show();
     }
};

now, I got the class my_first_form, and I will start an instance of it as a startup window
wvl::executer<my_first_form> runner;
runner.run();

OK, Let's take a look at the whole program

#include<wvl/wvl.h>

class my_first_form: public wvl::form
{
public:
     my_first_form()
     {
         this->text("Hello world");
         this->show();
     }
};

int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE, char*, int)
{
    wvl::executer<my_first_form> runner;
    runner.run();
    return 0;
}

Now, I want to add a button to the form my_first_form, and click it to exit the application, so I insert a private member into the class
wvl::button btn_exit_;

And create the button when the form is creating
btn_exit_.create(*this, "Exit", wvl::point(100, 50), wvl::size(100, 20));

but until now, the button btn_exit_ is useless, I have to install a click event for it. Before installing the event, I must write a function in responding to the click event.
void on_click_btn_exit()
{
    this->close();
}

OK, I get an answering function now, so I can install the click event for the button.
btn_exit_.make_event<wvl::event::mouse_click>(wvl::bind_mem_fun(this, &my_first_form::on_click_btn_exit));

the application is finished now. Let's take a look at the whole program.

#include<wvl/wvl.h>

class my_first_form: public wvl::form
{
public:
    my_first_form()
    {
        btn_exit_.create(*this, "Exit", wvl::point(100, 50), wvl::size(100, 20));
        btn_exit_.make_event<wvl::event::mouse_click>(wvl::bind_mem_fun(this, &my_first_form::on_click_btn_exit));

        this->text("Hello world");
        this->show();
    }
private:
    void on_click_btn_exit()
    {
        this->close();
    }   
private:
    wvl::button btn_exit_;
};

int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE, char*, int)
{
    wvl::executer<my_first_form> runner;
    runner.run();
    return 0;
}

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