##############################################################################
# ThanCad 0.0.9 "DoesSomething": 2dimensional CAD with raster support for engineers.
#
# Copyright (c) 2001-2009 Thanasis Stamos, August 23, 2009
# URL: http://thancad.sourceforge.net
# e-mail: cyberthanasis@excite.com
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details (www.gnu.org/licenses/gpl.html).
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##############################################################################
"""\
ThanCad 0.0.9 "DoesSomething": 2dimensional CAD with raster support for engineers.
This module defines line states, i.e. as the user moves the mouse, one or more lines
are drawn from a given point to mouse cursor, continuously.
"""
from math import hypot
import Tkinter
from thantkconst import *
from thanvar import thanLogTk
from thantkguigeneric import ThanStateGeneric
class ThanStateLine(ThanStateGeneric):
"An object which interprets mouse movements to a line."
def __init__(self, proj, x1, y1):
"Initialize object."
self.thanProj = proj
self.__x1 = x1
self.__y1 = y1
dc = self.thanProj[2].thanCanvas
dc.thanOrtho.enable(x1, y1) # Ortho is disabled in thanCleanup in stateless mixin
self.__dragged = dc.create_line(10000, 10000, 10001, 10001) # Dummy element to avoid complexity in onMotion()
dc.thanTempItems.add(self.__dragged)
def thanOnMotion(self, event, x, y):
"Well, here is what should be drawn each time mouse moves."
dc = self.thanProj[2].thanCanvas
xb, yb = dc.thanOrtho.orthoxy(x, y)
i1 = self.__dragged
self.__dragged = dc.create_line(self.__x1, self.__y1, xb, yb, fill="blue")
dc.delete(i1)
dc.thanTempItems.remove(i1)
dc.thanTempItems.add(self.__dragged)
def thanOnClick(self, event, x, y, cc):
"Well, here is what should be done when mouse clicks."
dc = self.thanProj[2].thanCanvas
dc.delete(self.__dragged)
dc.thanTempItems.remove(self.__dragged)
dc.thanLastResult = cc, None
dc.thanState = THAN_STATE_NONE
dc.thanOState = ThanStateGeneric(self.thanProj)
def thanZoomXyr(self, x, y, fact):
"Change internal coordinates according to zoom; this fuction should be in the state objects."
self.__x1 = x + (self.__x1-x)*fact
self.__y1 = y + (self.__y1-y)*fact
class ThanStateLine2(ThanStateGeneric):
"An object which interprets mouse movements to 2 lines."
def __init__(self, proj, x1, y1, x2, y2):
"Initialize object."
self.thanProj = proj
self.__x1 = x1
self.__y1 = y1
self.__x2 = x2
self.__y2 = y2
dc = self.thanProj[2].thanCanvas
dc.thanOrtho.enable(x2, y2) # Ortho is disabled in thanCleanup in stateless mixin
self.__dragged = (dc.create_line(10000, 10000, 10001, 10001),) # Dummy element to avoid complexity in onMotion()
for i1 in self.__dragged:
dc.thanTempItems.add(i1)
def thanOnMotion(self, event, x, y):
"Well, here is what should be drawn each time mouse moves."
dc = self.thanProj[2].thanCanvas
xb, yb = dc.thanOrtho.orthoxy(x, y)
draggedp = self.__dragged
self.__dragged = (dc.create_line(self.__x1, self.__y1, xb, yb, fill="blue"),
dc.create_line(self.__x2, self.__y2, xb, yb, fill="blue"),
)
for i1 in draggedp:
dc.delete(i1)
dc.thanTempItems.remove(i1)
for i1 in self.__dragged:
dc.thanTempItems.add(i1)
def thanOnClick(self, event, x, y, cc):
"Well, here is what should be done when mouse clicks."
dc = self.thanProj[2].thanCanvas
for i1 in self.__dragged:
dc.delete(i1)
dc.thanTempItems.remove(i1)
dc.thanLastResult = cc, None
dc.thanState = THAN_STATE_NONE
dc.thanOState = ThanStateGeneric(self.thanProj)
def thanZoomXyr(self, x, y, fact):
"Change internal coordinates according to zoom; this fuction should be in the state objects."
self.__x1 = x + (self.__x1-x)*fact
self.__y1 = y + (self.__y1-y)*fact
self.__x2 = x + (self.__x2-x)*fact
self.__y2 = y + (self.__y2-y)*fact
class ThanStatePolar(ThanStateGeneric):
"An object which interprets mouse movements to a line of constant length."
def __init__(self, proj, x1, y1, r1):
"Initialize object."
self.thanProj = proj
self.__x1 = x1
self.__y1 = y1
self.__r1 = r1
dc = self.thanProj[2].thanCanvas
dc.thanOrtho.enable(x1, y1) # Ortho is disabled in thanCleanup in stateless mixin
self.__dragged = dc.create_line(10000, 10000, 10001, 10001) # Dummy element to avoid complexity in onMotion()
dc.thanTempItems.add(self.__dragged)
def thanOnMotion(self, event, x, y):
"Well, here is what should be drawn each time mouse moves."
dc = self.thanProj[2].thanCanvas
xb, yb = dc.thanOrtho.orthoxy(x, y)
dx2 = xb - self.__x1
dy2 = yb - self.__y1
r = hypot(dx2, dy2)
if r == 0:
x2 = xb
y2 = yb
else:
x2 = self.__x1 + dx2*self.__r1/r
y2 = self.__y1 + dy2*self.__r1/r
i1 = self.__dragged
self.__dragged = dc.create_line(self.__x1, self.__y1, x2, y2, fill="blue")
dc.delete(i1)
dc.thanTempItems.remove(i1)
dc.thanTempItems.add(self.__dragged)
def thanOnClick(self, event, x, y, cc):
"Well, here is what should be done when mouse clicks."
dc = self.thanProj[2].thanCanvas
dc.delete(self.__dragged)
dc.thanTempItems.remove(self.__dragged)
dc.thanLastResult = cc, None
dc.thanState = THAN_STATE_NONE
dc.thanOState = ThanStateGeneric(self.thanProj)
def thanZoomXyr(self, x, y, fact):
"Change internal coordinates according to zoom; this fuction should be in the state objects."
self.__x1 = x + (self.__x1-x)*fact
self.__y1 = y + (self.__y1-y)*fact
self.__r1 *= fact
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