from __future__ import absolute_import # System modules import curses import curses.panel import sys # Third-party modules import six # LLDB modules 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 __eq__(self, rhs): return self.x == rhs.x and self.y == rhs.y def __ne__(self, rhs): return self.x != rhs.x or self.y != rhs.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) def __eq__(self, rhs): return self.w == rhs.w and self.h == rhs.h def __ne__(self, rhs): return self.w != rhs.w or self.h != rhs.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 def __eq__(self, rhs): return self.origin == rhs.origin and self.size == rhs.size def __ne__(self, rhs): return self.origin != rhs.origin or self.size != rhs.size class QuitException(Exception): def __init__(self): super(QuitException, self).__init__('QuitException') class Window(object): def __init__(self, window, delegate=None, can_become_first_responder=True): self.window = window self.parent = None self.delegate = delegate self.children = list() self.first_responders = list() self.can_become_first_responder = can_become_first_responder self.key_actions = dict() def add_child(self, window): self.children.append(window) window.parent = self def resize(self, size): self.window.resize(size.h, size.w) def resize_child(self, child, delta_size, adjust_neighbors): if child in self.children: frame = self.get_frame() orig_frame = child.get_frame() new_frame = Rect( x=orig_frame.origin.x, y=orig_frame.origin.y, w=orig_frame.size.w + delta_size.w, h=orig_frame.size.h + delta_size.h) old_child_max_x = orig_frame.get_max_x() new_child_max_x = new_frame.get_max_x() window_max_x = frame.get_max_x() if new_child_max_x < window_max_x: child.resize(new_frame.size) if old_child_max_x == window_max_x: new_frame.origin.x += window_max_x - new_child_max_x child.set_position(new_frame.origin) elif new_child_max_x > window_max_x: new_frame.origin.x -= new_child_max_x - window_max_x child.set_position(new_frame.origin) child.resize(new_frame.size) if adjust_neighbors: #print('orig_frame = %s\r\n' % (str(orig_frame)), end='') for curr_child in self.children: if curr_child is child: continue curr_child_frame = curr_child.get_frame() if delta_size.w != 0: #print('curr_child_frame = %s\r\n' % (str(curr_child_frame)), end='') if curr_child_frame.get_min_x() == orig_frame.get_max_x(): curr_child_frame.origin.x += delta_size.w curr_child_frame.size.w -= delta_size.w #print('adjusted curr_child_frame = %s\r\n' % (str(curr_child_frame)), end='') curr_child.resize(curr_child_frame.size) curr_child.slide_position( Size(w=delta_size.w, h=0)) elif curr_child_frame.get_max_x() == orig_frame.get_min_x(): curr_child_frame.size.w -= delta_size.w #print('adjusted curr_child_frame = %s\r\n' % (str(curr_child_frame)), end='') curr_child.resize(curr_child_frame.size) def add_key_action(self, arg, callback, decription): if isinstance(arg, list): for key in arg: self.add_key_action(key, callback, description) else: if isinstance(arg, six.integer_types): key_action_dict = {'key': arg, 'callback': callback, 'description': decription} self.key_actions[arg] = key_action_dict elif isinstance(arg, basestring): key_integer = ord(arg) key_action_dict = {'key': key_integer, 'callback': callback, 'description': decription} self.key_actions[key_integer] = key_action_dict else: raise ValueError def draw_title_box(self, title): is_in_first_responder_chain = self.is_in_first_responder_chain() if is_in_first_responder_chain: self.attron(curses.A_REVERSE) self.box() if is_in_first_responder_chain: self.attroff(curses.A_REVERSE) if title: self.addstr(Point(x=2, y=0), ' ' + title + ' ') def remove_child(self, window): self.children.remove(window) def get_first_responder(self): if len(self.first_responders): return self.first_responders[-1] else: return None def set_first_responder(self, window): if window.can_become_first_responder: if six.callable( getattr( window, "hidden", None)) and window.hidden(): return False if window not in self.children: self.add_child(window) # See if we have a current first responder, and if we do, let it know that # it will be resigning as first responder first_responder = self.get_first_responder() if first_responder: first_responder.relinquish_first_responder() # Now set the first responder to "window" if len(self.first_responders) == 0: self.first_responders.append(window) else: self.first_responders[-1] = window return True else: return False def push_first_responder(self, window): # Only push the window as the new first responder if the window isn't # already the first responder if window != self.get_first_responder(): self.first_responders.append(window) def pop_first_responder(self, window): # Only pop the window from the first responder list if it is the first # responder if window == self.get_first_responder(): old_first_responder = self.first_responders.pop() old_first_responder.relinquish_first_responder() return True else: return False def relinquish_first_responder(self): '''Override if there is something that you need to do when you lose first responder status.''' # def resign_first_responder(self, remove_from_parent, new_first_responder): # success = False # if self.parent: # if self.is_first_responder(): # self.relinquish_first_responder() # if len(self.parent.first_responder): # self.parent.first_responder = None # success = True # if remove_from_parent: # self.parent.remove_child(self) # if new_first_responder: # self.parent.set_first_responder(new_first_responder) # else: # self.parent.select_next_first_responder() # return success def is_first_responder(self): if self.parent: return self.parent.get_first_responder() == self else: return False def is_in_first_responder_chain(self): if self.parent: return self in self.parent.first_responders else: return False def select_next_first_responder(self): if len(self.first_responders) > 1: self.pop_first_responder(self.first_responders[-1]) else: num_children = len(self.children) if num_children == 1: return self.set_first_responder(self.children[0]) for (i, window) in enumerate(self.children): if window.is_first_responder(): break if i < num_children: for i in range(i + 1, num_children): if self.set_first_responder(self.children[i]): return True for i in range(0, i): if self.set_first_responder(self.children[i]): return True 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 addch(self, c): try: self.window.addch(c) except: pass def addch_at_point(self, pt, c): try: self.window.addch(pt.y, pt.x, c) except: pass def addstr(self, pt, str): try: self.window.addstr(pt.y, pt.x, str) except: pass def addnstr_at_point(self, pt, str, n): try: self.window.addnstr(pt.y, pt.x, str, n) except: pass def addnstr(self, str, n): try: self.window.addnstr(str, n) except: pass def attron(self, attr): return self.window.attron(attr) def attroff(self, attr): return self.window.attroff(attr) def box(self, vertch=0, horch=0): if vertch == 0: vertch = curses.ACS_VLINE if horch == 0: horch = curses.ACS_HLINE self.window.box(vertch, horch) 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_cursor(self): (y, x) = self.window.getyx() return Point(x=x, y=y) 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_frame_in_parent(self): position = self.get_position_in_parent() size = self.get_size() return Rect(x=position.x, y=position.y, w=size.w, h=size.h) def get_position_in_parent(self): (y, x) = self.window.getparyx() return Point(x, y) 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 move(self, pt): self.window.move(pt.y, pt.x) def refresh(self): self.update() curses.panel.update_panels() self.move(Point(x=0, y=0)) return self.window.refresh() def resize(self, size): return self.window.resize(size.h, size.w) def timeout(self, timeout_msec): return self.window.timeout(timeout_msec) def handle_key(self, key, check_parent=True): '''Handle a key press in this window.''' # First try the first responder if this window has one, but don't allow # it to check with its parent (False second parameter) so we don't recurse # and get a stack overflow for first_responder in reversed(self.first_responders): if first_responder.handle_key(key, False): return True # Check our key map to see if we have any actions. Actions don't take # any arguments, they must be callable if key in self.key_actions: key_action = self.key_actions[key] key_action['callback']() return True # Check if there is a wildcard key for any key if -1 in self.key_actions: key_action = self.key_actions[-1] key_action['callback']() return True # Check if the window delegate wants to handle this key press if self.delegate: if six.callable(getattr(self.delegate, "handle_key", None)): if self.delegate.handle_key(self, key): return True if self.delegate(self, key): return True # Check if we have a parent window and if so, let the parent # window handle the key press if check_parent and self.parent: return self.parent.handle_key(key, True) else: return False # Key not handled def update(self): for child in self.children: child.update() def quit_action(self): raise QuitException def get_key(self, timeout_msec=-1): self.timeout(timeout_msec) done = False c = self.window.getch() if c == 27: self.timeout(0) escape_key = 0 while True: escape_key = self.window.getch() if escape_key == -1: break else: c = c << 8 | escape_key self.timeout(timeout_msec) return c def key_event_loop(self, timeout_msec=-1, n=sys.maxsize): '''Run an event loop to receive key presses and pass them along to the responder chain. timeout_msec is the timeout it milliseconds. If the value is -1, an infinite wait will be used. It the value is zero, a non-blocking mode will be used, and if greater than zero it will wait for a key press for timeout_msec milliseconds. n is the number of times to go through the event loop before exiting''' done = False while not done and n > 0: c = self.get_key(timeout_msec) if c != -1: try: self.handle_key(c) except QuitException: done = True n -= 1 class Panel(Window): def __init__(self, frame, delegate=None, can_become_first_responder=True): window = curses.newwin( frame.size.h, frame.size.w, frame.origin.y, frame.origin.x) super( Panel, self).__init__( window, delegate, can_become_first_responder) self.panel = curses.panel.new_panel(window) def hide(self): return self.panel.hide() def hidden(self): return self.panel.hidden() def show(self): return self.panel.show() def top(self): return self.panel.top() def set_position(self, pt): self.panel.move(pt.y, pt.x) def slide_position(self, size): new_position = self.get_position() new_position.x = new_position.x + size.w new_position.y = new_position.y + size.h self.set_position(new_position) class BoxedPanel(Panel): def __init__(self, frame, title, delegate=None, can_become_first_responder=True): super( BoxedPanel, self).__init__( frame, delegate, can_become_first_responder) self.title = title self.lines = list() self.first_visible_idx = 0 self.selected_idx = -1 self.add_key_action( curses.KEY_UP, self.select_prev, "Select the previous item") self.add_key_action( curses.KEY_DOWN, self.select_next, "Select the next item") self.add_key_action( curses.KEY_HOME, self.scroll_begin, "Go to the beginning of the list") self.add_key_action( curses.KEY_END, self.scroll_end, "Go to the end of the list") self.add_key_action( 0x1b4f48, self.scroll_begin, "Go to the beginning of the list") self.add_key_action( 0x1b4f46, self.scroll_end, "Go to the end of the list") self.add_key_action( curses.KEY_PPAGE, self.scroll_page_backward, "Scroll to previous page") self.add_key_action( curses.KEY_NPAGE, self.scroll_page_forward, "Scroll to next forward") self.update() def clear(self, update=True): self.lines = list() self.first_visible_idx = 0 self.selected_idx = -1 if update: 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 an invalid coordinate if the line index isn't valid return Point(x=-1, y=-1) def set_title(self, title, update=True): self.title = title if update: self.update() def scroll_to_line(self, idx): if idx < len(self.lines): self.selected_idx = idx max_visible_lines = self.get_usable_height() if idx < self.first_visible_idx or idx >= self.first_visible_idx + max_visible_lines: self.first_visible_idx = idx self.refresh() def scroll_begin(self): self.first_visible_idx = 0 if len(self.lines) > 0: self.selected_idx = 0 else: self.selected_idx = -1 self.update() def scroll_end(self): max_visible_lines = self.get_usable_height() num_lines = len(self.lines) if num_lines > max_visible_lines: self.first_visible_idx = num_lines - max_visible_lines else: self.first_visible_idx = 0 self.selected_idx = num_lines - 1 self.update() def scroll_page_backward(self): num_lines = len(self.lines) max_visible_lines = self.get_usable_height() new_index = self.first_visible_idx - max_visible_lines if new_index < 0: self.first_visible_idx = 0 else: self.first_visible_idx = new_index self.refresh() def scroll_page_forward(self): max_visible_lines = self.get_usable_height() self.first_visible_idx += max_visible_lines self._adjust_first_visible_line() self.refresh() def select_next(self): self.selected_idx += 1 if self.selected_idx >= len(self.lines): self.selected_idx = len(self.lines) - 1 self.refresh() def select_prev(self): self.selected_idx -= 1 if self.selected_idx < 0: if len(self.lines) > 0: self.selected_idx = 0 else: self.selected_idx = -1 self.refresh() def get_selected_idx(self): return self.selected_idx def _adjust_first_visible_line(self): num_lines = len(self.lines) max_visible_lines = self.get_usable_height() if (self.first_visible_idx >= num_lines) or ( 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.draw_title_box(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(): is_selected = line_idx == self.selected_idx if is_selected: self.attron(curses.A_REVERSE) self.move(pt) self.addnstr(self.lines[line_idx], max_width) if is_selected: self.attroff(curses.A_REVERSE) else: return def load_file(self, path): f = open(path) if f: self.lines = f.read().splitlines() for (idx, line) in enumerate(self.lines): # Remove any tabs from lines since they hose up the display if "\t" in line: self.lines[idx] = (8 * ' ').join(line.split('\t')) self.selected_idx = 0 self.first_visible_idx = 0 self.refresh() class Item(object): def __init__(self, title, action): self.title = title self.action = action class TreeItemDelegate(object): def might_have_children(self): return False def update_children(self, item): '''Return a list of child Item objects''' return None def draw_item_string(self, tree_window, item, s): pt = tree_window.get_cursor() width = tree_window.get_size().w - 1 if width > pt.x: tree_window.addnstr(s, width - pt.x) def draw_item(self, tree_window, item): self.draw_item_string(tree_window, item, item.title) def do_action(self): pass class TreeItem(object): def __init__( self, delegate, parent=None, title=None, action=None, is_expanded=False): self.parent = parent self.title = title self.action = action self.delegate = delegate self.is_expanded = not parent or is_expanded self._might_have_children = None self.children = None self._children_might_have_children = False def get_children(self): if self.is_expanded and self.might_have_children(): if self.children is None: self._children_might_have_children = False self.children = self.update_children() for child in self.children: if child.might_have_children(): self._children_might_have_children = True break else: self._children_might_have_children = False self.children = None return self.children def append_visible_items(self, items): items.append(self) children = self.get_children() if children: for child in children: child.append_visible_items(items) def might_have_children(self): if self._might_have_children is None: if not self.parent: # Root item always might have children self._might_have_children = True else: # Check with the delegate to see if the item might have # children self._might_have_children = self.delegate.might_have_children() return self._might_have_children def children_might_have_children(self): return self._children_might_have_children def update_children(self): if self.is_expanded and self.might_have_children(): self.children = self.delegate.update_children(self) for child in self.children: child.update_children() else: self.children = None return self.children def get_num_visible_rows(self): rows = 1 if self.is_expanded: children = self.get_children() if children: for child in children: rows += child.get_num_visible_rows() return rows def draw(self, tree_window, row): display_row = tree_window.get_display_row(row) if display_row >= 0: tree_window.move(tree_window.get_item_draw_point(row)) if self.parent: self.parent.draw_tree_for_child(tree_window, self, 0) if self.might_have_children(): tree_window.addch(curses.ACS_DIAMOND) tree_window.addch(curses.ACS_HLINE) elif self.parent and self.parent.children_might_have_children(): if self.parent.parent: tree_window.addch(curses.ACS_HLINE) tree_window.addch(curses.ACS_HLINE) else: tree_window.addch(' ') tree_window.addch(' ') is_selected = tree_window.is_selected(row) if is_selected: tree_window.attron(curses.A_REVERSE) self.delegate.draw_item(tree_window, self) if is_selected: tree_window.attroff(curses.A_REVERSE) def draw_tree_for_child(self, tree_window, child, reverse_depth): if self.parent: self.parent.draw_tree_for_child( tree_window, self, reverse_depth + 1) if self.children[-1] == child: # Last child if reverse_depth == 0: tree_window.addch(curses.ACS_LLCORNER) tree_window.addch(curses.ACS_HLINE) else: tree_window.addch(' ') tree_window.addch(' ') else: # Middle child if reverse_depth == 0: tree_window.addch(curses.ACS_LTEE) tree_window.addch(curses.ACS_HLINE) else: tree_window.addch(curses.ACS_VLINE) tree_window.addch(' ') def was_selected(self): self.delegate.do_action() class TreePanel(Panel): def __init__(self, frame, title, root_item): self.root_item = root_item self.title = title self.first_visible_idx = 0 self.selected_idx = 0 self.items = None super(TreePanel, self).__init__(frame) self.add_key_action( curses.KEY_UP, self.select_prev, "Select the previous item") self.add_key_action( curses.KEY_DOWN, self.select_next, "Select the next item") self.add_key_action( curses.KEY_RIGHT, self.right_arrow, "Expand an item") self.add_key_action( curses.KEY_LEFT, self.left_arrow, "Unexpand an item or navigate to parent") self.add_key_action( curses.KEY_HOME, self.scroll_begin, "Go to the beginning of the tree") self.add_key_action( curses.KEY_END, self.scroll_end, "Go to the end of the tree") self.add_key_action( 0x1b4f48, self.scroll_begin, "Go to the beginning of the tree") self.add_key_action( 0x1b4f46, self.scroll_end, "Go to the end of the tree") self.add_key_action( curses.KEY_PPAGE, self.scroll_page_backward, "Scroll to previous page") self.add_key_action( curses.KEY_NPAGE, self.scroll_page_forward, "Scroll to next forward") def get_selected_item(self): if self.selected_idx < len(self.items): return self.items[self.selected_idx] else: return None def select_item(self, item): if self.items and item in self.items: self.selected_idx = self.items.index(item) return True else: return False def get_visible_items(self): # Clear self.items when you want to update all chidren if self.items is None: self.items = list() children = self.root_item.get_children() if children: for child in children: child.append_visible_items(self.items) return self.items def update(self): self.erase() self.draw_title_box(self.title) visible_items = self.get_visible_items() for (row, child) in enumerate(visible_items): child.draw(self, row) def get_item_draw_point(self, row): display_row = self.get_display_row(row) if display_row >= 0: return Point(2, display_row + 1) else: return Point(-1, -1) def get_display_row(self, row): if row >= self.first_visible_idx: display_row = row - self.first_visible_idx if display_row < self.get_size().h - 2: return display_row return -1 def is_selected(self, row): return row == self.selected_idx def get_num_lines(self): self.get_visible_items() return len(self.items) def get_num_visible_lines(self): return self.get_size().h - 2 def select_next(self): self.selected_idx += 1 num_lines = self.get_num_lines() if self.selected_idx >= num_lines: self.selected_idx = num_lines - 1 self._selection_changed() self.refresh() def select_prev(self): self.selected_idx -= 1 if self.selected_idx < 0: num_lines = self.get_num_lines() if num_lines > 0: self.selected_idx = 0 else: self.selected_idx = -1 self._selection_changed() self.refresh() def scroll_begin(self): self.first_visible_idx = 0 num_lines = self.get_num_lines() if num_lines > 0: self.selected_idx = 0 else: self.selected_idx = -1 self.refresh() def redisplay_tree(self): self.items = None self.refresh() def right_arrow(self): selected_item = self.get_selected_item() if selected_item and selected_item.is_expanded == False: selected_item.is_expanded = True self.redisplay_tree() def left_arrow(self): selected_item = self.get_selected_item() if selected_item: if selected_item.is_expanded: selected_item.is_expanded = False self.redisplay_tree() elif selected_item.parent: if self.select_item(selected_item.parent): self.refresh() def scroll_end(self): num_visible_lines = self.get_num_visible_lines() num_lines = self.get_num_lines() if num_lines > num_visible_lines: self.first_visible_idx = num_lines - num_visible_lines else: self.first_visible_idx = 0 self.selected_idx = num_lines - 1 self.refresh() def scroll_page_backward(self): num_visible_lines = self.get_num_visible_lines() new_index = self.selected_idx - num_visible_lines if new_index < 0: self.selected_idx = 0 else: self.selected_idx = new_index self._selection_changed() self.refresh() def scroll_page_forward(self): num_lines = self.get_num_lines() num_visible_lines = self.get_num_visible_lines() new_index = self.selected_idx + num_visible_lines if new_index >= num_lines: new_index = num_lines - 1 self.selected_idx = new_index self._selection_changed() self.refresh() def _selection_changed(self): num_lines = self.get_num_lines() num_visible_lines = self.get_num_visible_lines() last_visible_index = self.first_visible_idx + num_visible_lines if self.selected_idx >= last_visible_index: self.first_visible_idx += (self.selected_idx - last_visible_index + 1) if self.selected_idx < self.first_visible_idx: self.first_visible_idx = self.selected_idx if self.selected_idx >= 0 and self.selected_idx < len(self.items): item = self.items[self.selected_idx] item.was_selected() class Menu(BoxedPanel): def __init__(self, title, items): max_title_width = 0 for item in items: if max_title_width < len(item.title): max_title_width = len(item.title) frame = Rect(x=0, y=0, w=max_title_width + 4, h=len(items) + 2) super( Menu, self).__init__( frame, title=None, delegate=None, can_become_first_responder=True) self.selected_idx = 0 self.title = title self.items = items for (item_idx, item) in enumerate(items): self.set_line(item_idx, item.title) self.hide() def update(self): super(Menu, self).update() def relinquish_first_responder(self): if not self.hidden(): self.hide() def perform_action(self): selected_idx = self.get_selected_idx() if selected_idx < len(self.items): action = self.items[selected_idx].action if action: action() class MenuBar(Panel): def __init__(self, frame): super(MenuBar, self).__init__(frame, can_become_first_responder=True) self.menus = list() self.selected_menu_idx = -1 self.add_key_action( curses.KEY_LEFT, self.select_prev, "Select the previous menu") self.add_key_action( curses.KEY_RIGHT, self.select_next, "Select the next menu") self.add_key_action( curses.KEY_DOWN, lambda: self.select(0), "Select the first menu") self.add_key_action( 27, self.relinquish_first_responder, "Hide current menu") self.add_key_action( curses.KEY_ENTER, self.perform_action, "Select the next menu item") self.add_key_action( 10, self.perform_action, "Select the next menu item") def insert_menu(self, menu, index=sys.maxsize): if index >= len(self.menus): self.menus.append(menu) else: self.menus.insert(index, menu) pt = self.get_position() for menu in self.menus: menu.set_position(pt) pt.x += len(menu.title) + 5 def perform_action(self): '''If no menu is visible, show the first menu. If a menu is visible, perform the action associated with the selected menu item in the menu''' menu_visible = False for menu in self.menus: if not menu.hidden(): menu_visible = True break if menu_visible: menu.perform_action() self.selected_menu_idx = -1 self._selected_menu_changed() else: self.select(0) def relinquish_first_responder(self): if self.selected_menu_idx >= 0: self.selected_menu_idx = -1 self._selected_menu_changed() def _selected_menu_changed(self): for (menu_idx, menu) in enumerate(self.menus): is_hidden = menu.hidden() if menu_idx != self.selected_menu_idx: if not is_hidden: if self.parent.pop_first_responder(menu) == False: menu.hide() for (menu_idx, menu) in enumerate(self.menus): is_hidden = menu.hidden() if menu_idx == self.selected_menu_idx: if is_hidden: menu.show() self.parent.push_first_responder(menu) menu.top() self.parent.refresh() def select(self, index): if index < len(self.menus): self.selected_menu_idx = index self._selected_menu_changed() def select_next(self): num_menus = len(self.menus) if self.selected_menu_idx == -1: if num_menus > 0: self.selected_menu_idx = 0 self._selected_menu_changed() else: if self.selected_menu_idx + 1 < num_menus: self.selected_menu_idx += 1 else: self.selected_menu_idx = -1 self._selected_menu_changed() def select_prev(self): num_menus = len(self.menus) if self.selected_menu_idx == -1: if num_menus > 0: self.selected_menu_idx = num_menus - 1 self._selected_menu_changed() else: if self.selected_menu_idx - 1 >= 0: self.selected_menu_idx -= 1 else: self.selected_menu_idx = -1 self._selected_menu_changed() def update(self): self.erase() is_in_first_responder_chain = self.is_in_first_responder_chain() if is_in_first_responder_chain: self.attron(curses.A_REVERSE) pt = Point(x=0, y=0) for menu in self.menus: self.addstr(pt, '| ' + menu.title + ' ') pt.x += len(menu.title) + 5 self.addstr(pt, '|') width = self.get_size().w while pt.x < width: self.addch_at_point(pt, ' ') pt.x += 1 if is_in_first_responder_chain: self.attroff(curses.A_REVERSE) for menu in self.menus: menu.update() class StatusPanel(Panel): def __init__(self, frame): super( StatusPanel, self).__init__( frame, delegate=None, can_become_first_responder=False) 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_at_point( 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()