private void _unset_2d_mode()
{
if (_fpbm != FractalPictureBoxMode._2DViewer) return;
_fpbm =FractalPictureBoxMode.none;
Paint -= (o, e) =>
{
_draw_selection_rect(e.Graphics, _first_mouse_point, _second_mouse_point);
};
MouseDown -= _onmousedown_worker;
MouseUp -= _onmouseup_worker;
MouseMove -= (o, e) => { _second_mouse_point = e.Location; Invalidate(); };
MouseLeave -= (o, e) => { _is_mouse_into = false; };
MouseEnter -= (o, e) => { _is_mouse_into = true; };
}
private void _set_click_mode()
{
if (_fpbm == FractalPictureBoxMode.clickmode) return;
_fpbm = FractalPictureBoxMode.clickmode;
_click_pt = new Point();
Paint += (o, e) =>
{
if (_click_pt.X <0 && _click_pt.Y <0) return;
_draw_inverse_color_vertical_line(new Point(_click_pt.X,0),new Point(_click_pt.X,Height),e.Graphics);
_draw_inverse_color_horizontal_line(new Point(0, _click_pt.Y), new Point(Width, _click_pt.Y),e.Graphics);
};
MouseMove += _mouse_move_clmode;
}
