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Article #1283: Dynamic Buttons and Scrolling Demo

Created at 22:34 Jan 23, 2013 by xecronix

Last modified at 22:35 Jan 23, 2013

#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Scroll.H>

class DynamicButtons : public Fl_Scroll
{
        private:
        Fl_Button *buttons[256];
        char labels[256][4];

        public:
        DynamicButtons(int X, int Y, int W, int H, const char*L=0) : Fl_Scroll(X,Y,W,H,L)
        {
                int button_width = 50;
                int button_height = 50;
                int current_button = 0;
                int i = 0;
                int j = 0;
                int color = 1;
                int x = 0;
                int y = 0;
                memset(labels, '\0', 256 * 4);
                for (i = 0; i < 16; i++)
                {
                        for (j = 0; j < 16; j++)
                        {
                                sprintf(labels[current_button],"%d", color);
                                buttons[current_button] = new Fl_Button(x,y,button_width, button_height, (const char *)labels[current_button]);
                                buttons[current_button]->color(color);
                                current_button++;
                                x+=button_width;
                                color++;
                        }
                        x=0;
                        y+=button_height;
                }
        }

        ~DynamicButtons()
        {
                for (int i=0; i < 256; i++)
                {
                        delete buttons[i];
                }
        }
};

int main(int argc, char *argv[])
{
        Fl_Window *win = new Fl_Window(800,800,"Colored Buttons Scorllalbe Window");
        win->resizable(win); //Don't forget to do this or else the scroll bars don't show up.
        DynamicButtons *buttons = new DynamicButtons(0,0,800,800,0);
        win->end();
        win->show();
        int retval = Fl::run();
        delete buttons;
        delete win;
        return retval;
}

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