Treeviwe Tooltips class
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pyfpdb/TreeViewTooltips.py
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pyfpdb/TreeViewTooltips.py
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# Copyright (c) 2006, Daniel J. Popowich
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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#
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# Send bug reports and contributions to:
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#
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# dpopowich AT astro dot umass dot edu
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#
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'''
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TreeViewTooltips.py
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Provides TreeViewTooltips, a class which presents tooltips for cells,
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columns and rows in a gtk.TreeView.
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------------------------------------------------------------
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This file includes a demo. Just execute the file:
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python TreeViewTooltips.py
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------------------------------------------------------------
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To use, first subclass TreeViewTooltips and implement the get_tooltip()
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method; see below. Then add any number of gtk.TreeVew widgets to a
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TreeViewTooltips instance by calling the add_view() method. Overview
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of the steps:
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# 1. subclass TreeViewTooltips
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class MyTooltips(TreeViewTooltips):
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# 2. overriding get_tooltip()
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def get_tooltip(...):
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...
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# 3. create an instance
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mytips = MyTooltips()
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# 4. Build up your gtk.TreeView.
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myview = gtk.TreeView()
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...# create columns, set the model, etc.
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# 5. Add the view to the tooltips
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mytips.add_view(myview)
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How it works: the add_view() method connects the TreeView to the
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"motion-notify" event with the callback set to a private method.
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Whenever the mouse moves across the TreeView the callback will call
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get_tooltip() with the following arguments:
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get_tooltip(view, column, path)
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where,
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view: the gtk.TreeView instance.
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column: the gtk.TreeViewColumn instance that the mouse is
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currently over.
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path: the path to the row that the mouse is currently over.
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Based on whether or not column and path are checked for specific
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values, get_tooltip can return tooltips for a cell, column, row or the
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whole view:
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Column Checked Path Checked Tooltip For...
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Y Y cell
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Y N column
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N Y row
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N N view
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get_tooltip() should return None if no tooltip should be displayed.
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Otherwise the return value will be coerced to a string (with the str()
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builtin) and stripped; if non-empty, the result will be displayed as
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the tooltip. By default, the tooltip popup window will be displayed
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centered and just below the pointer and will remain shown until the
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pointer leaves the cell (or column, or row, or view, depending on how
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get_tooltip() is implemented).
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'''
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import pygtk
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pygtk.require('2.0')
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import gtk
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import gtk.gdk
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import gobject
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if gtk.gtk_version < (2, 8):
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import warnings
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msg = ('''This module was developed and tested with version 2.8.18 of gtk. You are using version %d.%d.%d. Your milage may vary.'''
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% gtk.gtk_version)
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warnings.warn(msg)
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# major, minor, patch
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version = 1, 0, 0
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class TreeViewTooltips:
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def __init__(self):
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'''
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Initialize the tooltip. After initialization there are two
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attributes available for advanced control:
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window: the popup window that holds the tooltip text, an
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instance of gtk.Window.
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label: a gtk.Label that is packed into the window. The
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tooltip text is set in the label with the
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set_label() method, so the text can be plain or
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markup text.
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Be default, the tooltip is enabled. See the enabled/disabled
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methods.
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'''
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# create the window
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self.window = window = gtk.Window(gtk.WINDOW_POPUP)
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window.set_name('gtk-tooltips')
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window.set_resizable(False)
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window.set_border_width(4)
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window.set_app_paintable(True)
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window.connect("expose-event", self.__on_expose_event)
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# create the label
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self.label = label = gtk.Label()
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label.set_line_wrap(True)
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label.set_alignment(0.5, 0.5)
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label.set_use_markup(True)
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label.show()
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window.add(label)
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# by default, the tooltip is enabled
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self.__enabled = True
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# saves the current cell
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self.__save = None
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# the timer id for the next tooltip to be shown
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self.__next = None
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# flag on whether the tooltip window is shown
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self.__shown = False
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def enable(self):
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'Enable the tooltip'
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self.__enabled = True
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def disable(self):
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'Disable the tooltip'
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self.__enabled = False
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def __show(self, tooltip, x, y):
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'''show the tooltip popup with the text/markup given by
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tooltip.
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tooltip: the text/markup for the tooltip.
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x, y: the coord. (root window based) of the pointer.
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'''
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window = self.window
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# set label
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self.label.set_label(tooltip)
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# resize window
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w, h = window.size_request()
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# move the window
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window.move(*self.location(x,y,w,h))
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# show it
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window.show()
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self.__shown = True
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def __hide(self):
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'hide the tooltip'
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self.__queue_next()
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self.window.hide()
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self.__shown = False
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def __leave_handler(self, view, event):
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'when the pointer leaves the view, hide the tooltip'
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self.__hide()
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def __motion_handler(self, view, event):
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'As the pointer moves across the view, show a tooltip.'
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path = view.get_path_at_pos(int(event.x), int(event.y))
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if self.__enabled and path:
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path, col, x, y = path
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tooltip = self.get_tooltip(view, col, path)
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if tooltip is not None:
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tooltip = str(tooltip).strip()
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if tooltip:
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self.__queue_next((path, col), tooltip,
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int(event.x_root),
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int(event.y_root))
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return
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self.__hide()
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def __queue_next(self, *args):
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'queue next request to show a tooltip'
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# if args is non-empty it means a request was made to show a
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# tooltip. if empty, no request is being made, but any
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# pending requests should be cancelled anyway.
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cell = None
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# if called with args, break them out
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if args:
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cell, tooltip, x, y = args
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# if it's the same cell as previously shown, just return
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if self.__save == cell:
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return
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# if we have something queued up, cancel it
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if self.__next:
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gobject.source_remove(self.__next)
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self.__next = None
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# if there was a request...
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if cell:
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# if the tooltip is already shown, show the new one
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# immediately
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if self.__shown:
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self.__show(tooltip, x, y)
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# else queue it up in 1/2 second
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else:
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self.__next = gobject.timeout_add(500, self.__show,
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tooltip, x, y)
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# save this cell
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self.__save = cell
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def __on_expose_event(self, window, event):
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# this magic is required so the window appears with a 1-pixel
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# black border (default gtk Style). This code is a
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# transliteration of the C implementation of gtk.Tooltips.
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w, h = window.size_request()
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window.style.paint_flat_box(window.window, gtk.STATE_NORMAL,
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gtk.SHADOW_OUT, None, window,
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'tooltip', 0, 0, w, h)
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def location(self, x, y, w, h):
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'''Given the x,y coordinates of the pointer and the width and
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height (w,h) demensions of the tooltip window, return the x, y
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coordinates of the tooltip window.
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The default location is to center the window on the pointer
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and 4 pixels below it.
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'''
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return x - w/2, y + 4
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def add_view(self, view):
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'add a gtk.TreeView to the tooltip'
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assert isinstance(view, gtk.TreeView), \
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('This handler should only be connected to '
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'instances of gtk.TreeView')
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view.connect("motion-notify-event", self.__motion_handler)
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view.connect("leave-notify-event", self.__leave_handler)
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def get_tooltip(self, view, column, path):
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'See the module doc string for a description of this method'
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raise NotImplemented, 'Subclass must implement get_tooltip()'
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if __name__ == '__main__':
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############################################################
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# DEMO
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############################################################
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# First, subclass TreeViewTooltips
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class DemoTips(TreeViewTooltips):
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def __init__(self, customer_column):
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# customer_column is an instance of gtk.TreeViewColumn and
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# is being used in the gtk.TreeView to show customer names.
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self.cust_col = customer_column
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# call base class init
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TreeViewTooltips.__init__(self)
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def get_tooltip(self, view, column, path):
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# we have a two column view: customer, phone; we'll make
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# tooltips cell-based for the customer column, but generic
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# column-based for the phone column.
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# customer
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if column is self.cust_col:
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# By checking both column and path we have a
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# cell-based tooltip.
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model = view.get_model()
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customer = model[path][2]
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return '<big>%s %s</big>\n<i>%s</i>' % (customer.fname,
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customer.lname,
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customer.notes)
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# phone
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else:
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return ('<big><u>Generic Column Tooltip</u></big>\n'
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'Unless otherwise noted, all\narea codes are 888')
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def XX_location(self, x, y, w, h):
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# rename me to "location" so I override the base class
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# method. This will demonstrate being able to change
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# where the tooltip window popups, relative to the
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# pointer.
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# this will place the tooltip above and to the right
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return x + 10, y - (h + 10)
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# Here's our customer
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class Customer:
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def __init__(self, fname, lname, phone, notes):
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self.fname = fname
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self.lname = lname
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self.phone = phone
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self.notes = notes
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# create a bunch of customers
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customers = []
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for fname, lname, phone, notes in [
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('Joe', 'Schmoe', '555-1212', 'Likes to Morris dance.'),
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('Jane', 'Doe', '555-2323',
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'Wonders what the hell\nMorris dancing is.'),
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('Phred', 'Phantastic', '900-555-1212', 'Dreams of Betty.'),
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('Betty', 'Boop', '555-3434', 'Dreams in b&w.'),
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('Red Sox', 'Fan', '555-4545',
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"Still livin' 2004!\nEspecially after 2006.")]:
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customers.append(Customer(fname, lname, phone, notes))
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# Build our model and view
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model = gtk.ListStore(str, str, object)
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for c in customers:
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model.append(['%s %s' % (c.fname, c.lname), c.phone, c])
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view = gtk.TreeView(model)
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view.get_selection().set_mode(gtk.SELECTION_NONE)
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# two columns, name and phone
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cell = gtk.CellRendererText()
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cell.set_property('xpad', 20)
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namecol = gtk.TreeViewColumn('Customer Name', cell, text=0)
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namecol.set_min_width(200)
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view.append_column(namecol)
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cell = gtk.CellRendererText()
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phonecol = gtk.TreeViewColumn('Phone', cell, text=1)
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view.append_column(phonecol)
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# finally, connect the tooltip, specifying the name column as the
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# column we want the tooltip to popup over.
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tips = DemoTips(namecol)
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tips.add_view(view)
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# We're going to demonstrate enable/disable. First we need a
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# callback function to connect to the toggled signal.
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def toggle(button):
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if button.get_active():
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tips.disable()
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else:
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tips.enable()
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# create a checkbutton and connect our handler
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check = gtk.CheckButton('Check to disable view tooltips')
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check.connect('toggled', toggle)
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# a standard gtk.Tooltips to compare to
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tt = gtk.Tooltips()
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tt.set_tip(check, ('This is a standard gtk tooltip.\n'
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'Compare me to the tooltips above.'))
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# create a VBox to pack the view and checkbutton
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vbox = gtk.VBox()
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vbox.pack_start(view)
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vbox.pack_start(check, False)
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vbox.show_all()
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# pack the vbox into a simple dialog and run it
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dialog = gtk.Dialog('TreeViewTooltips Demo')
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close = dialog.add_button(gtk.STOCK_CLOSE, gtk.RESPONSE_NONE)
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# add a tooltip for the close button
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tt.set_tip(close, 'Click to end the demo.')
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dialog.set_default_size(400,400)
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dialog.vbox.pack_start(vbox)
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dialog.run()
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