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ScrollView

 

Scrolling the view area

 

 

 

main.cpp

 

#include <CtrlLib/CtrlLib.h>

 

using namespace Upp;

 

struct App : public TopWindow {

    Point pos;

 

    virtual void Paint(Draw &w)

    {

        Size sz = GetSize();

        for(int i = pos.x / 50 - 50; (i * 50 - pos.y) < sz.cy; i++)

            for(int j = pos.y / 50 - 50; (j * 50 - pos.x) < sz.cx; j++)

                w.DrawRect(j * 50 - pos.x, i * 50 - pos.y, 50, 50,

                           Color(33 * j % 255, 11 * i % 255, 100));

    }

 

    virtual bool Key(dword key, int count)

    {

        if(key == K_SPACE) {

            Size sz = GetSize();

            Size delta(rand() % 50, rand() % 50);

            pos += delta;

            ScrollView(-delta);

        }

        return true;

    }

 

    App()

    {

        pos = Point(0, 0);

    }

};

 

GUI_APP_MAIN

{

//    Ctrl::ShowRepaint = 30;

    App().Run();

}

 

 

 

 

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