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#Copyright (c) 2011, Walter Bender
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#THE SOFTWARE.
# This procedure is invoked when the user-definable block on the "extras"
# palette is selected.
def myblock(lc, blkname):
###########################################################################
#
# Load a block on to the canvas
#
###########################################################################
from taconstants import BLOCK_NAMES, PRIMITIVES, CONTENT_BLOCKS, \
SPECIAL_NAMES
from tautils import find_group
def make_block(lc, name, x, y, defaults):
lc.tw._new_block(name, x + 20, y + 20, defaults)
# Find the block we just created and attach it to a stack.
lc.tw.drag_group = None
spr = lc.tw.sprite_list.find_sprite((x + 20, y + 20))
if spr is not None:
blk = lc.tw.block_list.spr_to_block(spr)
if blk is not None:
lc.tw.drag_group = find_group(blk)
lc.tw._snap_to_dock()
# Disassociate new block from mouse.
lc.tw.drag_group = None
return blk.height
def find_block(lc, blkname, x, y, defaults=None):
""" Create a new block. It is a bit more work than just calling
_new_block(). We need to:
(1) translate the label name into the internal block name;
(2) 'dock' the block onto a stack where appropriate; and
(3) disassociate the new block from the mouse. """
print blkname
for name in BLOCK_NAMES:
# Translate label name into block/prim name.
if blkname in BLOCK_NAMES[name]:
if (name in PRIMITIVES and PRIMITIVES[name] == name) or \
name in CONTENT_BLOCKS:
return make_block(lc, name, x, y, defaults)
for name in SPECIAL_NAMES:
# Translate label name into block/prim name.
if blkname in SPECIAL_NAMES[name]:
return make_block(lc, name, x, y, defaults)
return -1
# Place the block at the active turtle (x, y) and
# push height to stack.
x, y = lc.tw.active_turtle.get_xy()
if type(blkname) == type([]):
name = blkname[0]
value = blkname[1:]
dy = int(find_block(lc, name, x, y, value))
else:
name = blkname
dy = int(find_block(lc, name, x, y))
if dy != -1:
lc.heap.append(dy)
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