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AnimatedHello

 

Animated Hello world example

 

This is "enhanced version" of Hello world example - text is colored and animated.

 

 

 

 

Hello.cpp

 

// This is Upp conversion of Qt example, see

// http://doc.trolltech.com/3.0/hello-example.html

 

#include <CtrlLib/CtrlLib.h>

 

using namespace Upp;

 

class HelloWorld : public TopWindow {

public:

    virtual void LeftDown(Point, dword);

    virtual void Paint(Draw& w);

 

private:

    String text;

    

    void Animate()                        { Refresh(); }

 

public:

    typedef HelloWorld CLASSNAME;

 

    HelloWorld& Text(const String& t)     { text = t; Refresh(); return *this; }

 

    HelloWorld();

};

 

HelloWorld::HelloWorld()

{

    SetTimeCallback(-40, THISBACK(Animate));

    BackPaint();

    Zoomable().Sizeable();

    SetRect(0, 0, 260, 80);

}

 

void HelloWorld::LeftDown(Point, dword)

{

    Close();

}

 

void HelloWorld::Paint(Draw& w)

{

    Size sz = GetSize();

   static int sin_tbl[16] = {

       0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100, -92, -71, -38

    };

    w.DrawRect(sz, White);

    Size tsz = GetTextSize(text, Roman(32));

    Point pos = (sz - tsz) / 2;

    for(int i = 0; i < text.GetLength(); i++) {

        int q = (i + GetTickCount() / 40) & 15;

        w.DrawText(pos.x, pos.y + sin_tbl[q] * (sz.cy - 32) / 200,

                   ~text + i, Roman(32), HsvColorf(q / 15.0, 1, 0.5), 1);

        pos.x += Roman(32).Info()[text[i]];

    }

}

 

GUI_APP_MAIN

{

    HelloWorld hw;

    hw.Title("Hello world example");

    hw.Text(Nvl(Join(CommandLine(), " "), "Hello world !"));

    hw.Run();

}

 

 

 

 

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