# File: treetips.py # Author: Toshio Kuratomi # Date: 6 April, 2004 # Copyright: Toshio Kuratomi # License: GPL # Id: $Id: treetips.py 188 2005-06-14 00:55:59Z badger $ """A tooltip class for TreeViews """ __revision__ = "$Rev: 188 $" import gtk import gobject class TreeTips(gtk.Widget): ''' A tooltips widget specialized to work with gtk.TreeView's. TreeTips associates a column in a TreeStore with tooltips that will be displayed when the mouse is over the row the column is for. Each row can have one treetip. ''' __gproperties__ = { 'tip_window' : (gobject.TYPE_PYOBJECT, 'The window that the tooltip is displayed in.', 'The window that the tooltip is displayed in.', gobject.PARAM_READABLE), 'tip_label' : (gobject.TYPE_PYOBJECT, 'The label that displays the tooltip text.', 'The label that displays the tooltip text.', gobject.PARAM_READABLE), 'active_tips_data' : (gobject.TYPE_PYOBJECT, 'The data associated with the active tooltip.', 'The data associated with the active tooltip.', gobject.PARAM_READABLE), 'delay' : (gobject.TYPE_INT, 'MSecs before displaying the tooltip.', 'The delay between the mouse pausing over the widget and the' ' display of the tooltip in msec.', 0, 60000, 500, gobject.PARAM_READWRITE), 'enabled' : (gobject.TYPE_BOOLEAN, 'If TRUE the tooltips are enabled', 'If TRUE the tooltips are enabled', True, gobject.PARAM_READABLE), 'view' : (gobject.TYPE_PYOBJECT, 'gtk.TreeView that we get our data from.', 'The tip data comes from a column in a gtk.TreeView.', gobject.PARAM_READWRITE), 'column' : (gobject.TYPE_INT, 'Column from the gtk.TreeView that holds tip data.', 'The tip data for each row is held by a column in the row.' ' This specifies which column that data is in.', 0, 32000, 0, gobject.PARAM_READWRITE) } def __init__(self, treeview=None, column=None): '''Create a new TreeTips Group. :Parameters: treeview : gtk.TreeView === Treeview for which the tips display, default is None. column : integer === Column id in the Treemodel holding the treetip text, default is None. ''' if treeview: try: treeview.connect('leave-notify-event', self.__tree_leave_notify) treeview.connect('motion-notify-event', self.__tree_motion_notify) except (AttributeError, TypeError): raise TypeError, ('The value of view must be an object that' 'implements leave-notify-event and motion-notify-event ' 'gsignals such as gtk.TreeStore.') gobject.GObject.__init__(self) self.view = treeview or None self.delay = 500 self.enabled = True self.column = column or 0 self.tip_window = gtk.Window(gtk.WINDOW_POPUP) self.tip_window.set_app_paintable(True) self.tip_window.set_border_width(4) self.tip_window.connect('expose-event', self.__paint_window) self.tip_label = gtk.Label('') self.tip_label.set_line_wrap(True) self.tip_label.set_alignment(0.5, 0.5) self.active_tips_data = '' self.tip_window.add(self.tip_label) self.unique = 1 # Unique number used for timeouts self.timeoutID = 0 self.path = None self.screenWidth = gtk.gdk.screen_width() self.screenHeight = gtk.gdk.screen_height() def enable(self): '''Enable showing of tooltips''' self.enabled = True def disable(self): '''Disable showing tooltips''' self.enabled = False def do_get_property(self, prop): '''Return the gproperty's value.''' if prop.name == 'delay': return self.delay elif prop.name == 'enabled': return self.enabled elif prop.name == 'view': return self.view elif prop.name == 'column': return self.column elif prop.name == 'active-tips-data': return self.active_tips_data elif prop.name == 'tip-label': return self.tip_label elif prop.name == 'tip-window': return self.tip_window else: raise AttributeError, 'unknown property %s' % prop.name def do_set_property(self, prop, value): '''Set the property of writable properties. ''' if prop.name == 'delay': self.delay = value elif prop.name == 'view': try: value.connect('leave-notify-event', self.__tree_leave_notify) value.connect('motion-notify-event', self.__tree_motion_notify) except (AttributeError, TypeError): raise TypeError, ('The value of view must be an object that' 'implements leave-notify-event and motion-notify-event ' 'gsignals') self.view = value elif prop.name == 'column': self.column = value else: raise AttributeError, 'unknown or read only property %s' % prop.name def __paint_window(self, window, event): window.style.paint_flat_box(window.window, gtk.STATE_NORMAL, gtk.SHADOW_OUT, None, window, 'tooltip', 0, 0, -1, -1) def __tree_leave_notify(self, tree, event): '''Hide tooltips when we leave the tree.''' self.timeoutID = 0 self.path = None self.tip_window.hide() def __tree_motion_notify(self, tree, event): '''Decide which tooltip to display when we move within the tree.''' if not self.enabled: return self.tip_window.hide() self.path = None self.unique += 1 self.timeoutID = self.unique gobject.timeout_add(self.delay, self.__treetip_show, tree, int(event.x), int(event.y), self.timeoutID) def __treetip_show(self, tree, xEvent, yEvent, ID): '''Show the treetip window.''' if self.timeoutID != ID: return False pathReturn = tree.get_path_at_pos(xEvent, yEvent) model = tree.get_model() if pathReturn == None: self.path = None elif self.path != pathReturn[0]: self.path = pathReturn[0] rowIter = model.get_iter(self.path) text = model.get_value(rowIter, self.column) self.active_tips_data = text if not text: self.tip_label.set_text('') return False self.tip_label.set_text(text) x, y = self.tip_label.size_request() self.tip_window.resize(x, y) windowWidth, windowHeight = self.tip_window.get_size() cellInfo = tree.get_cell_area(self.path, pathReturn[1]) x, y = self.__compute_tooltip_position(cellInfo, windowWidth, windowHeight) self.tip_window.move(int(x), int(y)) self.tip_window.show_all() return False def __compute_tooltip_position(self, cellInfo, popupWidth, popupHeight): '''Figures out where the tooltip should be placed on the page:: [p] = pointer x = [p] +---------+ (half on each side) y = [p] +------------+ |____________| If it fits else: +------------+ |____________| [p] ''' xOrigin, yOrigin = self.view.get_bin_window().get_origin() x = xOrigin + cellInfo.x + cellInfo.width/2 - popupWidth/2 if x < 0: x = 0 elif x + popupWidth > self.screenWidth: x = self.screenWidth - popupWidth y = yOrigin + cellInfo.y + cellInfo.height + 3 if y + popupHeight > self.screenHeight: y = yOrigin + cellInfo.y - 3 - popupHeight if y < 0: y = 0 return x, y gobject.type_register(TreeTips)