#include "GUI.hpp"

/** Image
 *  The Image-class draws the bitmap that it get from the Shared Memory.
 *  @param *buf: A pointer to the bitmap, that the image-class has to draw. Three chars are needed to get the RGB-value of a pixel, so the size equals window_height * window_width * 3.
 */

class Image : public Fl_Widget {
    uchar *buf;
    //Function to draw a bitmap
    void draw() {
        fl_draw_image(buf, x(), y(), w(), h());
    }

    /** The constructor of the image class, get additional
      * @param x: The mouse-position on the x-axis.
      * @param y: The mouse-position on the y-axis:
      * @param w: The width of a single pixel,
      * @param h: The height of a single pixel.
      */

public:

    Image(int x, int y, int w, int h) :
    Fl_Widget(x, y, w, h, 0) {
        buf = new uchar[w * h * 3];
        /*Just an example.*/
        for (int i = 0; i < h; i++) {
            for (int j = 0; j < w; j++) {
                buf[(j + (i * w)) * 3 + 1] = 0xff;
            }
        }
    }

    /*A function to change the colors of the image-class. It reads the colors from the Shared Memory-Class*/
    void change_color() {
        for (int i = 0; i < h(); i++) {
            for (int j = 0; j < w(); j++) {
                vkvm::Color c = vkvm::getPixel(j,i);
                buf[(i * w() + j) * 3 + 0] = c.getRed();
                buf[(i * w() + j) * 3 + 1] = c.getGreen();
                buf[(i * w() + j) * 3 + 2] = c.getBlue();
            }
        }
    }
};
/*Functions to refresh the image.*/
void refresh_image(void *pointer) {
    ((Image *) pointer)->redraw();
    Fl::repeat_timeout(0.5, refresh_image, pointer);//nach 0.5 sec refresh_image(pointer) anrufen. Here pointer ist wie ein Parameter
}

void change_color(void *pointer) {
    ((Image *) pointer)->change_color();
    Fl::repeat_timeout(1, change_color, pointer);
}

void refresh_statusbar(void *pointer) {
    ((Statusbar **) pointer)[0]->refresh_label();
    Fl::repeat_timeout(0.5, refresh_statusbar, pointer);
}

void change_status(void *pointer) {
    ((Statusbar **) pointer)[0]->change_text();
    Fl::repeat_timeout(1, change_status, pointer);
}