finalcut/test/mandelbrot.cpp

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// mandelbrot.cpp
#include "fapp.h"
#include "fdialog.h"
#include "fmessagebox.h"
//----------------------------------------------------------------------
// class Mandelbrot
//----------------------------------------------------------------------
#pragma pack(push)
#pragma pack(1)
class Mandelbrot : public FDialog
{
private:
virtual void draw();
public:
explicit Mandelbrot (FWidget* parent=0); // constructor
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~Mandelbrot(); // destructor
void onAccel (FAccelEvent*);
void onClose (FCloseEvent*);
protected:
void adjustSize();
};
#pragma pack(pop)
//----------------------------------------------------------------------
Mandelbrot::Mandelbrot (FWidget* parent) : FDialog(parent)
{
setText ("Mandelbrot set");
}
//----------------------------------------------------------------------
Mandelbrot::~Mandelbrot()
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{ }
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//----------------------------------------------------------------------
void Mandelbrot::draw()
{
int iter, max_iter;
int Cols, Lines, xoffset, yoffset, current_line;
double x, y, xtemp, x0, y0, dX, dY;
double x_min, x_max, y_min, y_max;
FDialog::draw();
if ( Encoding == fc::VT100 )
unsetVT100altChar();
x_min = -2.20;
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x_max = 1.00;
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y_min = -1.05;
y_max = 1.05;
max_iter = 99;
xoffset = xpos+xmin;
yoffset = ypos+ymin;
Cols = getClientWidth();
Lines = getClientHeight();
current_line = 1;
dX = (x_max - x_min) / (Cols - 1);
dY = (y_max - y_min) / Lines;
for (y0=y_min; y0 < y_max && current_line-1 < Lines; y0+=dY)
{
gotoxy (xoffset, yoffset+current_line);
for (x0=x_min; x0 < x_max; x0+=dX)
{
x = 0.0;
y = 0.0;
iter = 0;
while ( x*x + y*y < 4 && iter < max_iter )
{
xtemp = x*x - y*y + x0;
y = 2*x*y + y0;
x = xtemp;
iter++;
}
if ( iter < max_iter )
setColor(fc::Black, iter%16);
else
setColor(fc::Black, 0);
print(' ');
}
current_line++;
}
setUpdateVTerm(true);
}
//----------------------------------------------------------------------
void Mandelbrot::onAccel (FAccelEvent* ev)
{
close();
ev->accept();
}
//----------------------------------------------------------------------
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void Mandelbrot::onClose (FCloseEvent* ev)
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{
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int ret = FMessageBox::info ( this, "Quit"
, "Do you really want\n"
"to quit the program ?"
, FMessageBox::Yes
, FMessageBox::No );
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if ( ret == FMessageBox::Yes )
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ev->accept();
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else
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ev->ignore();
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}
//----------------------------------------------------------------------
void Mandelbrot::adjustSize()
{
int h = parentWidget()->getHeight() - 1;
int w = parentWidget()->getWidth() - 10;
setGeometry(6, 1, w, h, false);
FDialog::adjustSize();
}
//----------------------------------------------------------------------
// main part
//----------------------------------------------------------------------
int main (int argc, char* argv[])
{
// Create the application object
FApplication app(argc, argv);
// Create a simple dialog box
Mandelbrot mb(&app);
mb.setGeometry (6, 1, 70, 23);
mb.addAccelerator('q'); // press 'q' to quit
mb.setShadow();
app.setMainWidget(&mb);
mb.show();
return app.exec();
}