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import time
import curses, curses.panel
class Point(object):
def __init__(self, x, y):
self.x = x
self.y = y
def __repr__(self):
return str(self)
def __str__(self):
return "(x=%u, y=%u)" % (self.x, self.y)
def is_valid_coordinate(self):
return self.x >= 0 and self.y >= 0
class Size(object):
def __init__(self, w, h):
self.w = w
self.h = h
def __repr__(self):
return str(self)
def __str__(self):
return "(w=%u, h=%u)" % (self.w, self.h)
class Rect(object):
def __init__(self, x=0, y=0, w=0, h=0):
self.origin = Point(x, y)
self.size = Size(w, h)
def __repr__(self):
return str(self)
def __str__(self):
return "{ %s, %s }" % (str(self.origin), str(self.size))
def get_min_x(self):
return self.origin.x
def get_max_x(self):
return self.origin.x + self.size.w
def get_min_y(self):
return self.origin.y
def get_max_y(self):
return self.origin.y + self.size.h
def contains_point(self, pt):
if pt.x < self.get_max_x():
if pt.y < self.get_max_y():
if pt.x >= self.get_min_y():
return pt.y >= self.get_min_y()
return False
class Window(object):
def __init__(self, window):
self.window = window
def point_in_window(self, pt):
size = self.get_size()
return pt.x >= 0 and pt.x < size.w and pt.y >= 0 and pt.y < size.h
def addstr(self, pt, str):
try:
self.window.addstr(pt.y, pt.x, str)
except:
pass
def addnstr(self, pt, str, n):
try:
self.window.addnstr(pt.y, pt.x, str, n)
except:
pass
def box(self):
self.window.box()
def get_contained_rect(self, top_inset=0, bottom_inset=0, left_inset=0, right_inset=0, height=-1, width=-1):
'''Get a rectangle based on the top "height" lines of this window'''
rect = self.get_frame()
x = rect.origin.x + left_inset
y = rect.origin.y + top_inset
if height == -1:
h = rect.size.h - (top_inset + bottom_inset)
else:
h = height
if width == -1:
w = rect.size.w - (left_inset + right_inset)
else:
w = width
return Rect (x = x, y = y, w = w, h = h)
def erase(self):
self.window.erase()
def get_frame(self):
position = self.get_position()
size = self.get_size()
return Rect(x=position.x, y=position.y, w=size.w, h=size.h)
def get_position(self):
(y, x) = self.window.getbegyx()
return Point(x, y)
def get_size(self):
(y, x) = self.window.getmaxyx()
return Size(w=x, h=y)
def refresh(self):
curses.panel.update_panels()
return self.window.refresh()
def resize(self, size):
return window.resize(size.h, size.w)
class Panel(Window):
def __init__(self, frame):
window = curses.newwin(frame.size.h,frame.size.w, frame.origin.y, frame.origin.x)
super(Panel, self).__init__(window)
self.panel = curses.panel.new_panel(window)
def top(self):
self.panel.top()
def set_position(self, pt):
self.panel.move(pt.y, pt.x)
def slide_position(self, pt):
new_position = self.get_position()
new_position.x = new_position.x + pt.x
new_position.y = new_position.y + pt.y
self.set_position(new_position)
class BoxedPanel(Panel):
def __init__(self, frame, title):
super(BoxedPanel, self).__init__(frame)
self.title = title
self.lines = list()
self.first_visible_idx = 0
self.update()
def get_usable_width(self):
'''Valid usable width is 0 to (width - 3) since the left and right lines display the box around
this frame and we skip a leading space'''
w = self.get_size().w
if w > 3:
return w-3
else:
return 0
def get_usable_height(self):
'''Valid line indexes are 0 to (height - 2) since the top and bottom lines display the box around this frame.'''
h = self.get_size().h
if h > 2:
return h-2
else:
return 0
def get_point_for_line(self, global_line_idx):
'''Returns the point to use when displaying a line whose index is "line_idx"'''
line_idx = global_line_idx - self.first_visible_idx
num_lines = self.get_usable_height()
if line_idx < num_lines:
return Point(x=2, y=1+line_idx)
else:
return Point(x=-1, y=-1) # return an invalid coordinate if the line index isn't valid
def set_title (self, title, update=True):
self.title = title
if update:
self.update()
def _adjust_first_visible_line(self):
num_lines = len(self.lines)
max_visible_lines = self.get_usable_height()
if (num_lines - self.first_visible_idx) > max_visible_lines:
self.first_visible_idx = num_lines - max_visible_lines
def append_line(self, s, update=True):
self.lines.append(s)
self._adjust_first_visible_line()
if update:
self.update()
def set_line(self, line_idx, s, update=True):
'''Sets a line "line_idx" within the boxed panel to be "s"'''
if line_idx < 0:
return
while line_idx >= len(self.lines):
self.lines.append('')
self.lines[line_idx] = s
self._adjust_first_visible_line()
if update:
self.update()
def update(self):
self.erase()
self.box()
if self.title:
self.addstr(Point(x=2, y=0), ' ' + self.title + ' ')
max_width = self.get_usable_width()
for line_idx in range(self.first_visible_idx, len(self.lines)):
pt = self.get_point_for_line(line_idx)
if pt.is_valid_coordinate():
self.addnstr(pt, self.lines[line_idx], max_width)
else:
return
class StatusPanel(Panel):
def __init__(self, frame):
super(StatusPanel, self).__init__(frame)
self.status_items = list()
self.status_dicts = dict()
self.next_status_x = 1
def add_status_item(self, name, title, format, width, value, update=True):
status_item_dict = { 'name': name,
'title' : title,
'width' : width,
'format' : format,
'value' : value,
'x' : self.next_status_x }
index = len(self.status_items)
self.status_items.append(status_item_dict)
self.status_dicts[name] = index
self.next_status_x += width + 2;
if update:
self.update()
def increment_status(self, name, update=True):
if name in self.status_dicts:
status_item_idx = self.status_dicts[name]
status_item_dict = self.status_items[status_item_idx]
status_item_dict['value'] = status_item_dict['value'] + 1
if update:
self.update()
def update_status(self, name, value, update=True):
if name in self.status_dicts:
status_item_idx = self.status_dicts[name]
status_item_dict = self.status_items[status_item_idx]
status_item_dict['value'] = status_item_dict['format'] % (value)
if update:
self.update()
def update(self):
self.erase();
for status_item_dict in self.status_items:
self.addnstr(Point(x=status_item_dict['x'], y=0), '%s: %s' % (status_item_dict['title'], status_item_dict['value']), status_item_dict['width'])
stdscr = None
def intialize_curses():
global stdscr
stdscr = curses.initscr()
curses.noecho()
curses.cbreak()
stdscr.keypad(1)
try:
curses.start_color()
except:
pass
return Window(stdscr)
def terminate_curses():
global stdscr
if stdscr:
stdscr.keypad(0)
curses.echo()
curses.nocbreak()
curses.endwin()
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