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Mandelbrot: Add zoom out, correct initial render.

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This commit is contained in:
Augustin Cavalier 2016-05-27 19:23:21 -04:00
parent 86370d7b02
commit bdf389fde5
1 changed files with 15 additions and 12 deletions
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27
src/apps/mandelbrot/Mandelbrot.cpp
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@ -29,7 +29,6 @@ public:
FractalView();
~FractalView();
virtual void AttachedToWindow();
virtual void FrameResized(float, float)
{ RedrawFractal(); }
virtual void MouseDown(BPoint where);
@ -41,7 +40,7 @@ private:
double fLocationY;
double fSize;
void RedrawFractal();
void RedrawFractal(uint16 width = 0, uint16 height = 0);
};
@ -53,6 +52,7 @@ FractalView::FractalView()
fLocationY(0),
fSize(0.005)
{
RedrawFractal(641, 462);
}
@ -62,27 +62,30 @@ FractalView::~FractalView()
}
void FractalView::AttachedToWindow()
{
//RedrawFractal();
}
void FractalView::MouseDown(BPoint where)
{
uint32 buttons;
GetMouse(&where, &buttons);
BRect frame = Frame();
fLocationX = ((where.x - frame.Width() / 2) * fSize + fLocationX);
fLocationY = ((where.y - frame.Height() / 2) * -fSize + fLocationY);
fSize /= 2;
if (buttons & B_PRIMARY_MOUSE_BUTTON)
fSize /= 2;
else
fSize *= 2;
RedrawFractal();
}
void FractalView::RedrawFractal()
void FractalView::RedrawFractal(uint16 width, uint16 height)
{
delete fBitmap;
fBitmap = FractalEngine(Frame().Width(), Frame().Height(), fLocationX,
fLocationY, fSize);
if (width == 0)
width = (uint16)Frame().Width();
if (height == 0)
height = (uint16)Frame().Height();
fBitmap = FractalEngine(width, height, fLocationX, fLocationY, fSize);
Invalidate();
}