fixed error in update box region calculation for animated plots - gsl-shell.git - gsl-shell

diff --git a/agg-plot/window-cpp.h b/agg-plot/window-cpp.h
index 359520eb..5f636357 100644
--- a/agg-plot/window-cpp.h
+++ b/agg-plot/window-cpp.h

@@ -16,6 +16,25 @@ extern "C" {

#include "agg_trans_affine.h"

#include "split-parser.h"

+class opt_rect {

+ typedef agg::rect_base<int> rect_type;

+

+ bool m_defined;

+ rect_type m_rect;

+

+public:

+ opt_rect() : m_defined(false) {};

+

+ void clear() { m_defined = false; };

+ void set(const rect_type& r) { m_defined = true; m_rect = r; };

+ const rect_type& box() const { return m_rect; };

+

+ void compose(rect_type& dst, const rect_type& r)

+ {

+ dst = (m_defined ? agg::unite_rectangles(m_rect, r) : r);

+ };

+};

+

class window : public canvas_window {

public:

typedef plot<drawable, lua_management> plot_type;

@@ -33,8 +52,9 @@ public:

unsigned char *layer_buf;

agg::rendering_buffer layer_img;

- ref() : plot(0), matrix(), layer_buf(0) {};

- ref(plot_type *p) : plot(p), matrix(), layer_buf(0) {};

+ opt_rect dirty_rect;

+

+ ref(plot_type *p = 0) : plot(p), matrix(), layer_buf(0), dirty_rect() {};

~ref() { if (layer_buf) delete layer_buf; };