example.button.cpp

Todo:

provide button_image.bmp

// http://nanapro.codeplex.com/discussions/544169

#include <nana/gui.hpp>
#include <nana/gui/widgets/button.hpp>

int main()
{
    using namespace nana;

    form fm;

    //Define a background for a button.
    element::bground bground;

    //Load the BMP file
    //The second parameter is passed by true to indicate that each state aligns vertically.
    //The third parameter specifies the valid area of the picture. It uses the whole picture when the width or height of the valid area is zero.
    bground.image(paint::image("../Examples/bground.6states.bmp"), true, {});

    //Defaultly the button will stretch the whole background of state to fit the widget,
    //but it's easy to make the border deformation occurred. Now we need to specified the pixels
    //of 4 borders, and these border areas will not be deformed when stretching.
    bground.stretch_parts(4, 4, 4, 4);  //left, top, right, bottom

    //Create the button
    button btn(fm, nana::rectangle(20, 20, 140, 40));

    //Set the bground object.
    btn.set_bground(bground);

    fm.show();
        exec(

#ifdef NANA_AUTOMATIC_GUI_TESTING

                1, 1, [&btn]() {click(btn); }
#endif

        );
}