stock_browser.py

使用Pygtk写的几个例子

#!/usr/bin/env python
'''Stock Item and Icon Browser

This source code for this demo doesn't demonstrate anything particularly
useful in applications. The purpose of the "demo" is just to provide a
handy place to browse the available stock icons and stock items.
'''
# pygtk version: Maik Hertha <[e-mail]>

import gobject
import gtk
import re

def id_to_macro(stock_id):
    if stock_id == '':
        return ''
    if stock_id.startswith('gtk'):
        # gtk-foo-bar -> gtk.STOCK_FOO_BAR
        macro = 'gtk.STOCK' + \
            re.sub('-([^-]+)', lambda m:('_' + m.group(1).upper()), stock_id[3:])

    else:
        # demo-gtk-logo -> DEMO_GTK_LOGO as with custom icon-factories
        macro = re.sub('([^-]+)-?', lambda m:('_' + m.group(1).upper()), stock_id)
        macro = macro[1:]  # there is a leading '_' always

    return  macro


class StockItemInfo(object):
    def __init__(self, stock_id=''):
        self.stock_id = stock_id
        self.stock_item = None
        self.small_icon = None
        self.macro = id_to_macro(stock_id)
        self.accel_str = ''

class StockItemDisplay(object):
    def __init__(self):
        self.type_label = None
        self.macro_label = None
        self.id_label = None
        self.label_accel_label = None
        self.icon_image = None


def get_largest_size(stockid):
    ''' Finds the largest size at which the given image stock id is
        available. This would not be useful for a normal application.
    '''
    set = gtk.icon_factory_lookup_default(stockid)
    best_size = gtk.ICON_SIZE_INVALID
    best_pixels = 0

    sizes = set.get_sizes()
    n_sizes = len(sizes)

    i = 0
    while(i < n_sizes):
        width, height = gtk.icon_size_lookup(sizes[i])

        if(width * height > best_pixels):
            best_size = sizes[i]
            best_pixels = width * height

        i += 1

    return best_size


def macro_set_func_text(tree_column, cell, model, iter):
    info = model.get_value(iter, 0)
    cell.set_property("text", info.macro)

def id_set_func(tree_column, cell, model, iter):
    info = model.get_value(iter, 0)
    cell.set_property("text", info.stock_id)

def accel_set_func(tree_column, cell, model, iter):
    info = model.get_value(iter, 0)
    cell.set_property("text", info.accel_str)

def label_set_func(tree_column, cell, model, iter):
    info = model.get_value(iter, 0)
    cell.set_property("text", info.stock_item[1])


class StockItemAndIconBrowserDemo(gtk.Window):
    def __init__(self, parent=None):
        gtk.Window.__init__(self)
        try:
            self.set_screen(parent.get_screen())
        except AttributeError:
            self.connect('destroy', lambda *w: gtk.main_quit())

        self.set_title(self.__class__.__name__)
        self.set_default_size(-1, 500)
        self.set_border_width(8)

        hbox = gtk.HBox(False, 8)
        self.add(hbox)

        sw = gtk.ScrolledWindow()
        sw.set_shadow_type(gtk.SHADOW_ETCHED_IN)
        sw.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
        hbox.pack_start(sw, False, False, 0)

        model = self.__create_model()
        treeview = gtk.TreeView(model)
        sw.add(treeview)

        column = gtk.TreeViewColumn()
        column.set_title("Macro")

        cell_renderer = gtk.CellRendererPixbuf()
        column.pack_start(cell_renderer, False)
        column.set_attributes(cell_renderer, stock_id=1)

        cell_renderer = gtk.CellRendererText()
        column.pack_start(cell_renderer, True)
        column.set_cell_data_func(cell_renderer, macro_set_func_text)

        treeview.append_column(column)

        cell_renderer = gtk.CellRendererText()
        treeview.insert_column_with_data_func(-1, "Label", cell_renderer, label_set_func)

        cell_renderer = gtk.CellRendererText()
        treeview.insert_column_with_data_func(-1, "Accel", cell_renderer, accel_set_func)

        cell_renderer = gtk.CellRendererText()
        treeview.insert_column_with_data_func(-1, "ID", cell_renderer, id_set_func)

        align = gtk.Alignment(0.5, 0.0, 0.0, 0.0)
        hbox.pack_end(align, False, False, 0)

        frame = gtk.Frame("Selected Item")
        align.add(frame)

        vbox = gtk.VBox(False, 8)
        vbox.set_border_width(4)
        frame.add(vbox)

        display = StockItemDisplay()
        treeview.set_data("stock-display", display)

        display.type_label  = gtk.Label()
        display.macro_label = gtk.Label()
        display.id_label    = gtk.Label()
        display.label_accel_label = gtk.Label()
        display.icon_image  = gtk.Image(); # empty image

        vbox.pack_start(display.type_label, False, False, 0)
        vbox.pack_start(display.icon_image, False, False, 0)
        vbox.pack_start(display.label_accel_label, False, False, 0)
        vbox.pack_start(display.macro_label, False, False, 0)
        vbox.pack_start(display.id_label, False, False, 0)

        selection = treeview.get_selection()
        selection.set_mode(gtk.SELECTION_SINGLE)

        selection.connect("changed", self.on_selection_changed)

        self.show_all()

    def __create_model(self):
        store = gtk.ListStore(
            gobject.TYPE_PYOBJECT,
            gobject.TYPE_STRING)

        ids = gtk.stock_list_ids()
        ids.sort()

        for data in ids:
            info = StockItemInfo(stock_id=data)
            stock_item = gtk.stock_lookup(data)

            if stock_item:
                info.stock_item = stock_item
            else:
                # stock_id, label, modifier, keyval, translation_domain
                info.stock_item =('', '', 0, 0, '')

            # only show icons for stock IDs that have default icons
            icon_set = gtk.icon_factory_lookup_default(info.stock_id)
            if icon_set is None:
                info.small_icon = None
            else:
                # See what sizes this stock icon really exists at
                sizes = icon_set.get_sizes()
                n_sizes = len(sizes)

                # Use menu size if it exists, otherwise first size found
                size = sizes[0];
                i = 0;
                while(i < n_sizes):
                    if(sizes[i] == gtk.ICON_SIZE_MENU):
                        size = gtk.ICON_SIZE_MENU
                        break
                    i += 1

                info.small_icon = self.render_icon(info.stock_id, size)

                if(size != gtk.ICON_SIZE_MENU):
                    # Make the result the proper size for our thumbnail
                    w, h = gtk.icon_size_lookup(gtk.ICON_SIZE_MENU)

                    scaled = info.small_icon.scale_simple(w, h, 'bilinear')
                    info.small_icon = scaled

            if info.stock_item[3] == 0:
                info.accel_str = ""
            else:
                info.accel_str = \
                    gtk.accelerator_name(info.stock_item[3], info.stock_item[2])

            iter = store.append()
            store.set(iter, 0, info, 1, info.stock_id)

        return store

    def on_selection_changed(self, selection):
        treeview = selection.get_tree_view()
        display = treeview.get_data("stock-display")

        model, iter = selection.get_selected()
        if iter:
            info = model.get_value(iter, 0)

            if(info.small_icon and info.stock_item[1]):
                display.type_label.set_text("Icon and Item")

            elif(info.small_icon):
                display.type_label.set_text("Icon Only")

            elif(info.stock_item[1]):
                display.type_label.set_text("Item Only")

            else:
                display.type_label.set_text("???????")

            display.macro_label.set_text(info.macro)
            display.id_label.set_text(info.stock_id)

            if(info.stock_item[1]):
                s = "%s %s" % (info.stock_item[1], info.accel_str)
                display.label_accel_label.set_text_with_mnemonic(s)

            else:
                display.label_accel_label.set_text("")

            if(info.small_icon):
                display.icon_image.set_from_stock(info.stock_id,
                                      get_largest_size(info.stock_id))
            else:
                display.icon_image.set_from_pixbuf(None)

        else:
            display.type_label.set_text("No selected item")
            display.macro_label.set_text("")
            display.id_label.set_text("")
            display.label_accel_label.set_text("")
            display.icon_image.set_from_pixbuf(None)

def main():
    StockItemAndIconBrowserDemo()
    gtk.main()

if __name__ == '__main__':
    main()