# encoding: utf-8
#-----------------------------------------------------------------------------
# Name:        wx.lib.plot.py
# Purpose:     Line, Bar and Scatter Graphs
#
# Author:      Gordon Williams
#
# Created:     2003/11/03
# RCS-ID:      $Id: plot.py 51004 2008-01-03 08:17:39Z RD $
# Copyright:   (c) 2002
# Licence:     Use as you wish.
#-----------------------------------------------------------------------------
# 12/15/2003 - Jeff Grimmett (grimmtooth@softhome.net)
#
# o 2.5 compatability update.
# o Renamed to plot.py in the wx.lib directory.
# o Reworked test frame to work with wx demo framework. This saves a bit
#   of tedious cut and paste, and the test app is excellent.
#
# 12/18/2003 - Jeff Grimmett (grimmtooth@softhome.net)
#
# o wxScrolledMessageDialog -> ScrolledMessageDialog
#
# Oct 6, 2004  Gordon Williams (g_will@cyberus.ca)
#   - Added bar graph demo
#   - Modified line end shape from round to square.
#   - Removed FloatDCWrapper for conversion to ints and ints in arguments
#
# Oct 15, 2004  Gordon Williams (g_will@cyberus.ca)
#   - Imported modules given leading underscore to name.
#   - Added Cursor Line Tracking and User Point Labels.
#   - Demo for Cursor Line Tracking and Point Labels.
#   - Size of plot preview frame adjusted to show page better.
#   - Added helper functions PositionUserToScreen and PositionScreenToUser in PlotCanvas.
#   - Added functions GetClosestPoints (all curves) and GetClosestPoint (only closest curve)
#       can be in either user coords or screen coords.
#
#

"""
This is a simple light weight plotting module that can be used with
Boa or easily integrated into your own wxPython application.  The
emphasis is on small size and fast plotting for large data sets.  It
has a reasonable number of features to do line and scatter graphs
easily as well as simple bar graphs.  It is not as sophisticated or
as powerful as SciPy Plt or Chaco.  Both of these are great packages
but consume huge amounts of computer resources for simple plots.
They can be found at http://scipy.com

This file contains two parts; first the re-usable library stuff, then,
after a "if __name__=='__main__'" test, a simple frame and a few default
plots for examples and testing.

Based on wxPlotCanvas
Written by K.Hinsen, R. Srinivasan;
Ported to wxPython Harm van der Heijden, feb 1999

Major Additions Gordon Williams Feb. 2003 (g_will@cyberus.ca)
    -More style options
    -Zooming using mouse "rubber band"
    -Scroll left, right
    -Grid(graticule)
    -Printing, preview, and page set up (margins)
    -Axis and title labels
    -Cursor xy axis values
    -Doc strings and lots of comments
    -Optimizations for large number of points
    -Legends

Did a lot of work here to speed markers up. Only a factor of 4
improvement though. Lines are much faster than markers, especially
filled markers.  Stay away from circles and triangles unless you
only have a few thousand points.

Times for 25, 000 points
Line - 0.078 sec
Markers
Square -                   0.22 sec
dot -                      0.10
circle -                   0.87
cross, plus -               0.28
triangle, triangle_down -  0.90

Thanks to Chris Barker for getting this version working on Linux.

Zooming controls with mouse (when enabled):
    Left mouse drag - Zoom box.
    Left mouse double click - reset zoom.
    Right mouse click - zoom out centred on click location.
"""

import wx
import Resources.CeciliaLib as CeciliaLib
from .constants import *

try:
    import numpy as _Numeric
except:
    msg = """
    This module requires the NumPy module, which could not be imported.
    It probably is not installed (it's not part of the standard Python
    distribution). See the NumPy Python site (http://www.numpy.org/)
    for information on downloading source or binaries."""
    raise ImportError("NumPy not found. \n" + msg)

class PolyPoints:
    """Base Class for lines and markers
        - All methods are private.
    """
    def __init__(self, points, attr):
        self._points = _Numeric.array(points).astype(_Numeric.float32)
        self._logscale = (False, False)
        self.currentScale = (1, 1)
        self.currentShift = (0, 0)
        self.scaled = self.points
        self.attributes = {}
        self.attributes.update(self._attributes)
        for name, value in attr.items():
            if name not in self._attributes.keys():
                raise KeyError("Style attribute incorrect. Should be one of %s" % list(self._attributes.keys()))
            self.attributes[name] = value

    def setLogScale(self, logscale):
        self._logscale = logscale

    def __getattr__(self, name):
        if name == 'points':
            if len(self._points) > 0:
                data = _Numeric.array(self._points, copy=True)
                if self._logscale[0]:
                    data = self.log10(data, 0)
                if self._logscale[1]:
                    data = self.log10(data, 1)
                return data
            else:
                return self._points
        else:
            raise AttributeError(name)

    def log10(self, data, ind):
        data = _Numeric.compress(data[:, ind] > 0, data, 0)
        data[:, ind] = _Numeric.log10(data[:, ind])
        return data

    def boundingBox(self):
        if len(self.points) == 0:
            # no curves to draw
            # defaults to (-1, -1) and (1, 1) but axis can be set in Draw
            minXY = _Numeric.array([-1.0, -1.0])
            maxXY = _Numeric.array([1.0, 1.0])
        else:
            minXY = _Numeric.minimum.reduce(self.points)
            maxXY = _Numeric.maximum.reduce(self.points)
        return minXY, maxXY

    def scaleAndShift(self, scale=(1, 1), shift=(0, 0)):
        if len(self.points) == 0:
            # no curves to draw
            return
        if (scale is not self.currentScale) or (shift is not self.currentShift):
            # update point scaling
            self.scaled = scale * self.points + shift
            self.currentScale = scale
            self.currentShift = shift

    def getLegend(self):
        return self.attributes['legend']

    def getColour(self):
        return self.attributes['colour']

    def getClosestPoint(self, pntXY, pointScaled=True):
        """Returns the index of closest point on the curve, pointXY, scaledXY, distance
            x, y in user coords
            if pointScaled == True based on screen coords
            if pointScaled == False based on user coords
        """
        if pointScaled:
            #Using screen coords
            p = self.scaled
            pxy = self.currentScale * _Numeric.array(pntXY) + self.currentShift
        else:
            #Using user coords
            p = self.points
            pxy = _Numeric.array(pntXY)
        #determine distance for each point
        d = _Numeric.sqrt(_Numeric.add.reduce((p - pxy) ** 2, 1)) #sqrt(dx^2+dy^2)
        pntIndex = _Numeric.argmin(d)
        dist = d[pntIndex]
        return [pntIndex, self.points[pntIndex], self.scaled[pntIndex], dist]

class PolyLine(PolyPoints):
    """Class to define line type and style
        - All methods except __init__ are private.
    """

    _attributes = {'colour': 'black',
                   'width': 1,
                   'style': wx.SOLID,
                   'legend': ''}

    def __init__(self, points, **attr):
        """Creates PolyLine object
            points - sequence (array, tuple or list) of (x, y) points making up line
            **attr - key word attributes
                Defaults:
                    'colour'= 'black',          - wx.Pen Colour any wx.Colour
                    'width'= 1,                 - Pen width
                    'style'= wx.SOLID,          - wx.Pen style
                    'legend'= ''                - Line Legend to display
        """
        PolyPoints.__init__(self, points, attr)

    def draw(self, gc, coord=None):
        colour = self.attributes['colour']
        width = self.attributes['width']
        style = self.attributes['style']
        if not isinstance(colour, wx.Colour):
            colour = wx.Colour(colour)
        pen = wx.Pen(colour, width, style)
        pen.SetCap(wx.CAP_BUTT)
        gc.SetPen(pen)
        if coord is None:
            if len(self.scaled) >= 2:
                gc.StrokeLines([[x[0], x[1]] for x in self.scaled])
        else:
            gc.StrokeLines(coord.tolist()) # draw legend line, not used in Cecilia

    def getSymExtent(self):
        """Width and Height of Marker"""
        h = self.attributes['width']
        w = 5 * h
        return (w, h)

def GetCircleBitmap(w=6, h=6, fillcol="#000000", pencol="#000000"):
    maskColour = "#CCCCCC"
    b = wx.EmptyBitmap(w, h)
    dc = wx.MemoryDC(b)

    dc.SetBrush(wx.Brush(maskColour))
    dc.SetPen(wx.Pen(maskColour))
    dc.Clear()

    rec = wx.Rect(0, 0, w, h)
    dc.DrawRectangle(rec)
    dc.SetBrush(wx.Brush(fillcol, wx.SOLID))
    dc.SetPen(wx.Pen(pencol, 1, wx.SOLID))
    dc.DrawEllipse(0, 0, w, h)
    dc.SelectObject(wx.NullBitmap)
    b.SetMaskColour(maskColour)
    return b

class PolyMarker(PolyPoints):
    """Class to define marker type and style
        - All methods except __init__ are private.
    """

    _attributes = {'colour': 'black',
                   'width': 1,
                   'size': 2,
                   'fillcolour': None,
                   'fillstyle': wx.SOLID,
                   'marker': 'circle',
                   'legend': ''}

    def __init__(self, points, **attr):
        """Creates PolyMarker object
        points - sequence (array, tuple or list) of (x, y) points
        **attr - key word attributes
            Defaults:
                'colour'= 'black',          - wx.Pen Colour any wx.Colour
                'width'= 1,                 - Pen width
                'size'= 2,                  - Marker size
                'fillcolour'= same as colour,      - wx.Brush Colour any wx.Colour
                'fillstyle'= wx.SOLID,      - wx.Brush fill style (use wx.TRANSPARENT for no fill)
                'marker'= 'circle'          - Marker shape
                'legend'= ''                - Marker Legend to display

            Marker Shapes:
                - 'circle'
                - 'dot'
                - 'square'
                - 'triangle'
                - 'triangle_down'
                - 'cross'
                - 'plus'
                - 'bmp' ---> Cecilia 5 grapher marker
                - 'bmpsel' ---> Cecilia 5 grapher selected marker
                - 'none' ---> Cecilia 5 grapher non selected lines
        """

        PolyPoints.__init__(self, points, attr)
        self.circleBitmap = GetCircleBitmap(6, 6, "#000000", "#000000")
        self.circleBitmapSel = GetCircleBitmap(8, 8, "#EEEEEE", "#000000")

    def draw(self, gc, coord=None):
        colour = self.attributes['colour']
        width = self.attributes['width']
        size = self.attributes['size']
        fillcolour = self.attributes['fillcolour']
        fillstyle = self.attributes['fillstyle']
        marker = self.attributes['marker']

        if colour and not isinstance(colour, wx.Colour):
            colour = wx.Colour(colour)
        if fillcolour and not isinstance(fillcolour, wx.Colour):
            fillcolour = wx.Colour(fillcolour)

        gc.SetPen(wx.Pen(colour, width))
        if fillcolour:
            gc.SetBrush(wx.Brush(fillcolour, fillstyle))
        else:
            gc.SetBrush(wx.Brush(colour, fillstyle))
        if coord is None:
            self._drawmarkers(gc, self.scaled, marker, size)
        else:
            self._drawmarkers(gc, coord, marker, size) # draw legend marker

    def getSymExtent(self):
        """Width and Height of Marker"""
        s = 5 * self.attributes['size']
        return (s, s)

    def _drawmarkers(self, gc, coords, marker, size=1):
        f = eval('self._' + marker)
        f(gc, coords, size)

    def _bmp(self, gc, coords, size=1):
        path = gc.CreatePath()
        path.AddCircle(0, 0, 3)
        gc.PushState()
        last = (0, 0)
        for c in coords:
            dx, dy = c[0] - last[0], c[1] - last[1]
            gc.Translate(dx, dy)
            gc.FillPath(path)
            last = c
        gc.PopState()

    def _bmpsel(self, gc, coords, size=1):
        path = gc.CreatePath()
        path.AddCircle(0, 0, 3.5)
        gc.PushState()
        last = (0, 0)
        for c in coords:
            dx, dy = c[0] - last[0], c[1] - last[1]
            gc.Translate(dx, dy)
            gc.DrawPath(path)
            last = c
        gc.PopState()

    def _none(self, gc, coords, size=1):
        pass

class PlotGraphics:
    """Container to hold PolyXXX objects and graph labels
        - All methods except __init__ are private.
    """

    def __init__(self, objects, title='', xLabel='', yLabel=''):
        """Creates PlotGraphics object
        objects - list of PolyXXX objects to make graph
        title - title shown at top of graph
        xLabel - label shown on x-axis
        yLabel - label shown on y-axis
        """
        if type(objects) not in [list, tuple]:
            raise TypeError("objects argument should be list or tuple.")
        self.objects = objects
        self.title = title
        self.xLabel = xLabel
        self.yLabel = yLabel

    def setLogScale(self, logscale):
        if type(logscale) != tuple:
            raise TypeError('logscale must be a tuple of bools, e.g. (False, False).')
        if len(self.objects) == 0:
            return
        for o in self.objects:
            o.setLogScale(logscale)

    def boundingBox(self):
        p1, p2 = self.objects[0].boundingBox()
        for o in self.objects[1:]:
            p1o, p2o = o.boundingBox()
            p1 = _Numeric.minimum(p1, p1o)
            p2 = _Numeric.maximum(p2, p2o)
        return p1, p2

    def scaleAndShift(self, scale=(1, 1), shift=(0, 0)):
        for o in self.objects:
            o.scaleAndShift(scale, shift)

    def setXLabel(self, xLabel=''):
        """Set the X axis label on the graph"""
        self.xLabel = xLabel

    def setYLabel(self, yLabel=''):
        """Set the Y axis label on the graph"""
        self.yLabel = yLabel

    def setTitle(self, title=''):
        """Set the title at the top of graph"""
        self.title = title

    def getXLabel(self):
        """Get x axis label string"""
        return self.xLabel

    def getYLabel(self):
        """Get y axis label string"""
        return self.yLabel

    def getTitle(self, title=''):
        """Get the title at the top of graph"""
        return self.title

    def draw(self, gc):
        for o in self.objects:
            o.draw(gc)

    def getSymExtent(self):
        """Get max width and height of lines and markers symbols for legend"""
        symExt = self.objects[0].getSymExtent()
        for o in self.objects[1:]:
            oSymExt = o.getSymExtent()
            symExt = _Numeric.maximum(symExt, oSymExt)
        return symExt

    def getLegendNames(self):
        """Returns list of legend names"""
        lst = [None] * len(self)
        for i in range(len(self)):
            lst[i] = self.objects[i].getLegend()
        return lst

    def __len__(self):
        return len(self.objects)

    def __getitem__(self, item):
        return self.objects[item]


def GetRectMask(sw, sh, w, h):
    maskColor = wx.Colour(0, 0, 0)
    shownColor = wx.Colour(255, 255, 255)
    b = wx.EmptyBitmap(sw, sh)
    dc = wx.MemoryDC(b)
    dc.SetBrush(wx.Brush(maskColor))
    dc.SetPen(wx.Pen(maskColor))
    dc.DrawRectangle(0, 0, sw, sh)
    dc.SetBrush(wx.Brush(shownColor))
    dc.SetPen(wx.Pen(shownColor))
    dc.DrawRectangle(0, 0, w, h)
    dc.SelectObject(wx.NullBitmap)
    b.SetMaskColour(maskColor)
    return b

#-------------------------------------------------------------------------------
# Main window that you will want to import into your application.

class PlotCanvas(wx.Panel):
    """
    Subclass of a wx.Panel which holds two scrollbars and the actual
    plotting canvas (self.canvas). It allows for simple general plotting
    of data with zoom, labels, and automatic axis scaling."""

    def __init__(self, parent, id=wx.ID_ANY, pos=wx.DefaultPosition,
                 size=wx.DefaultSize, style=0, name="plotCanvas"):
        """Constructs a panel, which can be a child of a frame or
        any other non-control window"""

        wx.Panel.__init__(self, parent, id, pos, size, style, name)

        sizer = wx.FlexGridSizer(2, 2, 0, 0)
        self.canvas = wx.Window(self, size=parent.GetClientSize())

        self.sb_vert = wx.ScrollBar(self, -1, style=wx.SB_VERTICAL)
        self.sb_vert.SetScrollbar(0, 1000, 1000, 1000)
        self.sb_hor = wx.ScrollBar(self, -1, style=wx.SB_HORIZONTAL)
        self.sb_hor.SetScrollbar(0, 1000, 1000, 1000)

        sizer.Add(self.canvas, 1, wx.EXPAND)
        sizer.Add(self.sb_vert, 0, wx.EXPAND)
        sizer.Add(self.sb_hor, 0, wx.EXPAND)
        sizer.Add((0, 0))

        sizer.AddGrowableRow(0, 1)
        sizer.AddGrowableCol(0, 1)

        self.sb_vert.Show(False)
        self.sb_hor.Show(False)

        self.SetSizer(sizer)
        self.Fit()

        self.border = (1, 1)

        self.SetBackgroundColour("white")

        # Create some mouse events for zooming
        self.canvas.Bind(wx.EVT_LEFT_DOWN, self.OnMouseLeftDown)
        self.canvas.Bind(wx.EVT_LEFT_UP, self.OnMouseLeftUp)
        self.canvas.Bind(wx.EVT_MOTION, self.OnMotion)
        self.canvas.Bind(wx.EVT_LEFT_DCLICK, self.OnMouseDoubleClick)
        self.canvas.Bind(wx.EVT_RIGHT_DOWN, self.OnMouseRightDown)

        # scrollbar events
        self.Bind(wx.EVT_SCROLL_THUMBTRACK, self.OnScroll)
        self.Bind(wx.EVT_SCROLL_PAGEUP, self.OnScroll)
        self.Bind(wx.EVT_SCROLL_PAGEDOWN, self.OnScroll)
        self.Bind(wx.EVT_SCROLL_LINEUP, self.OnScroll)
        self.Bind(wx.EVT_SCROLL_LINEDOWN, self.OnScroll)

        # set curser as cross-hairs
        self.ArrowCursor = wx.Cursor(wx.CURSOR_ARROW)
        self.canvas.SetCursor(self.ArrowCursor)
        self.PencilCursor = wx.Cursor(wx.CURSOR_PENCIL)
        self.HandCursor = wx.Cursor(wx.CURSOR_HAND)
        self.GrabHandCursor = wx.Cursor(wx.CURSOR_HAND)
        self.MagCursor = wx.Cursor(wx.CURSOR_MAGNIFIER)

        # scrollbar variables
        self._sb_ignore = False
        self._adjustingSB = False
        self._sb_xfullrange = 0
        self._sb_yfullrange = 0
        self._sb_xunit = 0
        self._sb_yunit = 0

        self._dragEnabled = False
        self._screenCoordinates = _Numeric.array([0.0, 0.0])

        self._logscale = (False, False)
        self._background_bitmap = None
        self._oldSize = wx.Size(0, 0)

        # Zooming variables
        self._zoomInFactor = 0.5
        self._zoomOutFactor = 2
        self._zoomCorner1 = _Numeric.array([0.0, 0.0]) # left mouse down corner
        self._zoomCorner2 = _Numeric.array([0.0, 0.0])   # left mouse up corner
        self._zoomEnabled = False
        self._hasDragged = False

        # Drawing Variables
        self.last_draw = None
        self._pointScale = 1
        self._pointShift = 0
        self._xSpec = 'auto'
        self._ySpec = 'auto'
        self._gridEnabled = False
        self._legendEnabled = False
        self._titleEnabled = True
        self._clientSize = (0, 0)

        # Fonts
        self._fontCache = {}
        self._fontSizeAxis = 9
        self._fontSizeTitle = 15
        self._fontSizeLegend = 10

        # Values to print on graph
        self._posToDrawValues = (0, 0)
        self._Xvalue = ''
        self._Yvalue = ''

        # corners from selection rect
        self._selectionCorner1 = None
        self._selectionCorner2 = None

        # current time value
        self.time = 0

        # pointLabels
        self._pointLabelEnabled = False
        self.last_PointLabel = None
        self._pointLabelFunc = None
        self.canvas.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeave)

        self._useScientificNotation = False

        self.canvas.Bind(wx.EVT_PAINT, self.OnPaint)
        self.canvas.Bind(wx.EVT_SIZE, self.OnSize)

        self._isWindowCreated = False

        if '__WXGTK__' in wx.PlatformInfo:
            self.canvas.Bind(wx.EVT_WINDOW_CREATE, self.doOnSize)
        else:
            self.doOnSize()

        self._gridColour = wx.Colour('black')

    def doOnSize(self, evt=None):
        self._isWindowCreated = True
        self.OnSize(None) # sets the initial size based on client size

    def setValuesToDraw(self, pos, x=None, y=None):
        self._posToDrawValues = pos
        if x is not None:
            self._Xvalue = 'X: %.3f' % x
            self._Yvalue = 'Y: %.3f' % y
        else:
            self._Xvalue = ''
            self._Yvalue = ''

    def drawSelectionRect(self, c1, c2):
        self._selectionCorner1 = c1
        self._selectionCorner2 = c2

    def SetCursor(self, cursor):
        self.canvas.SetCursor(cursor)

    def GetGridColour(self):
        return self._gridColour

    def SetGridColour(self, colour):
        if isinstance(colour, wx.Colour):
            self._gridColour = colour
        else:
            self._gridColour = wx.Colour(colour)

    def SetBackColour(self, colour):
        if isinstance(colour, wx.Colour):
            self._backColour = colour
        else:
            self._backColour = wx.Colour(colour)

    def setBackgroundBitmap(self, bit):
        self._background_bitmap = bit

    def setLogScale(self, logscale):
        if type(logscale) != tuple:
            raise TypeError('logscale must be a tuple of bools, e.g. (False, False).')
        if self.last_draw is not None:
            graphics, xAxis, yAxis = self.last_draw
            graphics.setLogScale(logscale)
            self.last_draw = (graphics, None, None)
        self.SetXSpec('min')
        self.SetYSpec('min')
        self._logscale = logscale

    def getLogScale(self):
        return self._logscale

    def SetFontSizeAxis(self, point=10):
        """Set the tick and axis label font size (default is 10 point)"""
        self._fontSizeAxis = point

    def GetFontSizeAxis(self):
        """Get current tick and axis label font size in points"""
        return self._fontSizeAxis

    def SetFontSizeTitle(self, point=15):
        """Set Title font size (default is 15 point)"""
        self._fontSizeTitle = point

    def GetFontSizeTitle(self):
        """Get current Title font size in points"""
        return self._fontSizeTitle

    def SetFontSizeLegend(self, point=7):
        """Set Legend font size (default is 7 point)"""
        self._fontSizeLegend = point

    def GetFontSizeLegend(self):
        """Get current Legend font size in points"""
        return self._fontSizeLegend

    def SetShowScrollbars(self, value):
        """Set True to show scrollbars"""
        if value not in [True, False]:
            raise TypeError("Value should be True or False.")
        if value == self.GetShowScrollbars():
            return
        self.sb_vert.Show(value)
        self.sb_hor.Show(value)
        wx.CallAfter(self.Layout)

    def GetShowScrollbars(self):
        """Set True to show scrollbars"""
        return self.sb_vert.IsShown()

    def SetUseScientificNotation(self, useScientificNotation):
        self._useScientificNotation = useScientificNotation

    def GetUseScientificNotation(self):
        return self._useScientificNotation

    def SetToolCursor(self, tool):
        if tool == 0:
            self.SetCursor(self.ArrowCursor)
        elif tool == 1:
            self.SetCursor(self.PencilCursor)

    def SetEnableDrag(self, value, tool=0):
        """Set True to enable drag."""
        if value not in [True, False]:
            raise TypeError("Value should be True or False.")
        if value:
            if self.GetEnableZoom():
                self.SetEnableZoom(False)
            self.SetCursor(self.HandCursor)
        else:
            if tool == 0:
                self.SetCursor(self.ArrowCursor)
        self._dragEnabled = value

    def GetEnableDrag(self):
        return self._dragEnabled

    def SetEnableZoom(self, value, tool=0):
        """Set True to enable zooming."""
        if value not in [True, False]:
            raise TypeError("Value should be True or False.")
        if value:
            if self.GetEnableDrag():
                self.SetEnableDrag(False)
            self.SetCursor(self.MagCursor)
        else:
            if tool == 0:
                self.SetCursor(self.ArrowCursor)
        self._zoomEnabled = value

    def GetEnableZoom(self):
        """True if zooming enabled."""
        return self._zoomEnabled

    def SetEnableGrid(self, value):
        """Set True to enable grid."""
        if value not in [True, False, 'Horizontal', 'Vertical']:
            raise TypeError("Value should be True, False, Horizontal or Vertical.")
        self._gridEnabled = value
        self.Redraw()

    def GetEnableGrid(self):
        """True if grid enabled."""
        return self._gridEnabled

    def SetEnableLegend(self, value):
        """Set True to enable legend."""
        if value not in [True, False]:
            raise TypeError("Value should be True or False.")
        self._legendEnabled = value
        self.Redraw()

    def GetEnableLegend(self):
        """True if Legend enabled."""
        return self._legendEnabled

    def SetEnableTitle(self, value):
        """Set True to enable title."""
        if value not in [True, False]:
            raise TypeError("Value should be True or False.")
        self._titleEnabled = value
        self.Redraw()

    def GetEnableTitle(self):
        """True if title enabled."""
        return self._titleEnabled

    def SetEnablePointLabel(self, value):
        """Set True to enable pointLabel."""
        if value not in [True, False]:
            raise TypeError("Value should be True or False.")
        self._pointLabelEnabled = value
        self.Redraw()  #will erase existing pointLabel if present
        self.last_PointLabel = None

    def GetEnablePointLabel(self):
        """True if pointLabel enabled."""
        return self._pointLabelEnabled

    def SetPointLabelFunc(self, func):
        """Sets the function with custom code for pointLabel drawing
            ******** more info needed ***************
        """
        self._pointLabelFunc = func

    def GetPointLabelFunc(self):
        """Returns pointLabel Drawing Function"""
        return self._pointLabelFunc

    def Reset(self):
        """Unzoom the plot."""
        self.last_PointLabel = None        #reset pointLabel
        if self.last_draw is not None:
            self._Draw(self.last_draw[0])

    def ScrollRight(self, units):
        """Move view right number of axis units."""
        self.last_PointLabel = None        #reset pointLabel
        if self.last_draw is not None:
            graphics, xAxis, yAxis = self.last_draw
            xAxis = (xAxis[0] + units, xAxis[1] + units)
            self._Draw(graphics, xAxis, yAxis)

    def ScrollUp(self, units):
        """Move view up number of axis units."""
        self.last_PointLabel = None        #reset pointLabel
        if self.last_draw is not None:
             graphics, xAxis, yAxis = self.last_draw
             yAxis = (yAxis[0] + units, yAxis[1] + units)
             self._Draw(graphics, xAxis, yAxis)

    def GetXY(self, event):
        """Wrapper around _getXY, which handles log scales"""
        x, y = self._getXY(event)
        if self.getLogScale()[0]:
            x = _Numeric.power(10, x)
        if self.getLogScale()[1]:
            y = _Numeric.power(10, y)
        return x, y

    def _getXY(self, event):
        """Takes a mouse event and returns the XY user axis values."""
        x, y = self.PositionScreenToUser(event.GetPosition())
        return x, y

    def PositionUserToScreen(self, pntXY):
        """Converts User position to Screen Coordinates"""
        userPos = _Numeric.array(pntXY)
        x, y = userPos * self._pointScale + self._pointShift
        return x, y

    def PositionScreenToUser(self, pntXY):
        """Converts Screen position to User Coordinates"""
        screenPos = _Numeric.array(pntXY)
        x, y = (screenPos - self._pointShift) / self._pointScale
        return x, y

    def SetXSpec(self, type='auto'):
        """xSpec- defines x axis type. Can be 'none', 'min' or 'auto'
        where:
            'none' - shows no axis or tick mark values
            'min' - shows min bounding box values
            'auto' - rounds axis range to sensible values
        """
        self._xSpec = type

    def SetYSpec(self, type='auto'):
        """ySpec- defines x axis type. Can be 'none', 'min' or 'auto'
        where:
            'none' - shows no axis or tick mark values
            'min' - shows min bounding box values
            'auto' - rounds axis range to sensible values
        """
        self._ySpec = type

    def GetXSpec(self):
        """Returns current XSpec for axis"""
        return self._xSpec

    def GetYSpec(self):
        """Returns current YSpec for axis"""
        return self._ySpec

    def GetXMaxRange(self):
        xAxis = self._getXMaxRange()
        if self.getLogScale()[0]:
            xAxis = _Numeric.power(10, xAxis)
        return xAxis

    def _getXMaxRange(self):
        """Returns (minX, maxX) x-axis range for displayed graph"""
        graphics = self.last_draw[0]
        p1, p2 = graphics.boundingBox()     # min, max points of graphics
        xAxis = self._axisInterval(self._xSpec, p1[0], p2[0]) # in user units
        return xAxis

    def GetYMaxRange(self):
        yAxis = self._getYMaxRange()
        if self.getLogScale()[1]:
            yAxis = _Numeric.power(10, yAxis)
        return yAxis

    def _getYMaxRange(self):
        """Returns (minY, maxY) y-axis range for displayed graph"""
        graphics = self.last_draw[0]
        p1, p2 = graphics.boundingBox()     # min, max points of graphics
        yAxis = self._axisInterval(self._ySpec, p1[1], p2[1])
        return yAxis

    def GetXCurrentRange(self):
        xAxis = self._getXCurrentRange()
        if self.getLogScale()[0]:
            xAxis = _Numeric.power(10, xAxis)
        return xAxis

    def _getXCurrentRange(self):
        """Returns (minX, maxX) x-axis for currently displayed portion of graph"""
        return self.last_draw[1]

    def GetYCurrentRange(self):
        yAxis = self._getYCurrentRange()
        if self.getLogScale()[1]:
            yAxis = _Numeric.power(10, yAxis)
        return yAxis

    def _getYCurrentRange(self):
        """Returns (minY, maxY) y-axis for currently displayed portion of graph"""
        return self.last_draw[2]

    def Draw(self, graphics, xAxis=None, yAxis=None, dc=None):
        """Wrapper around _Draw, which handles log axes"""

        graphics.setLogScale(self.getLogScale())

        # check Axis is either tuple or none
        if type(xAxis) not in [type(None), tuple]:
            raise TypeError("xAxis should be None or (minX, maxX)." + str(type(xAxis)))
        if type(yAxis) not in [type(None), tuple]:
            raise TypeError("yAxis should be None or (minY, maxY)." + str(type(xAxis)))

        # check case for axis = (a, b) where a==b caused by improper zooms
        if xAxis is not None:
            if xAxis[0] == xAxis[1]:
                return
            if self.getLogScale()[0]:
                xAxis = _Numeric.log10(xAxis)
        if yAxis is not None:
            if yAxis[0] == yAxis[1]:
                return
            if self.getLogScale()[1]:
                yAxis = _Numeric.log10(yAxis)
        self._Draw(graphics, xAxis, yAxis, dc)

    def _Draw(self, graphics, xAxis=None, yAxis=None, dc=None):
        """
        Draw objects in graphics with specified x and y axis.
        graphics- instance of PlotGraphics with list of PolyXXX objects
        xAxis - tuple with (min, max) axis range to view
        yAxis - same as xAxis
        dc - drawing context - doesn't have to be specified.
        If it's not, the offscreen buffer is used
        """
        if self._zoomed:
            minX, minY = _Numeric.minimum(self._zoomCorner1, self._zoomCorner2)
            maxX, maxY = _Numeric.maximum(self._zoomCorner1, self._zoomCorner2)
            xAxis = (minX, maxX)
            yAxis = (minY, maxY)
        # sizes axis to axis type, create lower left and upper right corners of plot
        if xAxis is None or yAxis is None:
            # One or both axis not specified in Draw
            p1, p2 = graphics.boundingBox()     # min, max points of graphics
            if xAxis is None:
                xAxis = self._axisInterval(self._xSpec, p1[0], p2[0]) # in user units
            if yAxis is None:
                yAxis = self._axisInterval(self._ySpec, p1[1], p2[1])
            # Adjust bounding box for axis spec
            p1[0], p1[1] = xAxis[0], yAxis[0]     # lower left corner user scale (xmin, ymin)
            p2[0], p2[1] = xAxis[1], yAxis[1]     # upper right corner user scale (xmax, ymax)
        else:
            # Both axis specified in Draw
            p1 = _Numeric.array([xAxis[0], yAxis[0]])    # lower left corner user scale (xmin, ymin)
            p2 = _Numeric.array([xAxis[1], yAxis[1]])     # upper right corner user scale (xmax, ymax)

        self.last_draw = (graphics, _Numeric.array(xAxis), _Numeric.array(yAxis))       # saves most recient values

        if dc is None:
            # sets new dc and clears it
            dc = wx.BufferedDC(wx.ClientDC(self.canvas), self._Buffer)
            dc.Clear()
            gc = wx.GraphicsContext_Create(dc)

        # set font size for every thing but title and legend
        dc.SetFont(self._getFont(self._fontSizeAxis))

        # Get ticks and textExtents for axis if required
        if self._xSpec != 'none':
            xticks = self._xticks(xAxis[0], xAxis[1])
            xTextExtent = dc.GetTextExtent(xticks[-1][1])# w h of x axis text last number on axis
        else:
            xticks = None
            xTextExtent = (0, 0) # No text for ticks
        if self._ySpec != 'none':
            yticks = self._yticks(yAxis[0], yAxis[1])
            if self.getLogScale()[1]:
                yTextExtent = dc.GetTextExtent('-2e-2')
            else:
                yTextExtentBottom = dc.GetTextExtent(yticks[0][1])
                yTextExtentTop = dc.GetTextExtent(yticks[-1][1])
                yTextExtent = (max(yTextExtentBottom[0], yTextExtentTop[0]),
                              max(yTextExtentBottom[1], yTextExtentTop[1]))

        else:
            yticks = None
            yTextExtent = (0, 0) # No text for ticks

        # TextExtents for Title and Axis Labels
        titleWH, xLabelWH, yLabelWH = self._titleLablesWH(dc, graphics)

        # TextExtents for Legend
        legendBoxWH, legendSymExt, legendTextExt = self._legendWH(dc, graphics)

        # room around graph area
        rhsW = xTextExtent[0] #max(xTextExtent[0], legendBoxWH[0]) # use larger of number width or legend width
        lhsW = yTextExtent[0] + yLabelWH[1]
        bottomH = max(xTextExtent[1], yTextExtent[1] / 2.) + xLabelWH[1]
        if wx.Platform == '__WXMAC__':
            topH = 0
            textSize_scale = _Numeric.array([rhsW + lhsW, 8]) #_Numeric.array([rhsW+lhsW, bottomH+topH]) # make plot area smaller by text size
        else:
            topH = yTextExtent[1] / 2. + titleWH[1]
            textSize_scale = _Numeric.array([rhsW + lhsW, 15]) # make plot area smaller by text size
        textSize_shift = _Numeric.array([lhsW, bottomH])          # shift plot area by this amount

        # draw title if requested
        if self._titleEnabled:
            dc.SetFont(self._getFont(self._fontSizeTitle))
            titlePos = (self.plotbox_origin[0] + lhsW + (self.plotbox_size[0] - lhsW - rhsW) / 2. - titleWH[0] / 2.,
                        self.plotbox_origin[1] - self.plotbox_size[1])
            dc.DrawText(graphics.getTitle(), titlePos[0], titlePos[1])

        # draw label text
        dc.SetTextForeground("#000000")
        dc.SetFont(self._getFont(self._fontSizeAxis))
        xLabelPos = (self.plotbox_origin[0] + lhsW + (self.plotbox_size[0] - lhsW - rhsW) / 2. - xLabelWH[0] / 2.,
                     self.plotbox_origin[1] - xLabelWH[1])
        dc.DrawText(graphics.getXLabel(), int(xLabelPos[0]), int(xLabelPos[1]))
        yLabelPos = (self.plotbox_origin[0],
                     self.plotbox_origin[1] - bottomH - (self.plotbox_size[1] - bottomH - topH) / 2. + yLabelWH[0] / 2.)
        if graphics.getYLabel():  # bug fix for Linux
            dc.DrawRotatedText(graphics.getYLabel(), yLabelPos[0], yLabelPos[1], 90)

        # drawing legend makers and text
        if self._legendEnabled:
            self._drawLegend(dc, graphics, rhsW, topH, legendBoxWH, legendSymExt, legendTextExt)

        # allow for scaling and shifting plotted points
        scale = (self.plotbox_size - textSize_scale) / (p2 - p1) * _Numeric.array((1, -1))
        shift = -p1 * scale + self.plotbox_origin + textSize_shift * _Numeric.array((1, -1))
        self._pointScale = scale  # make available for mouse events
        self._pointShift = shift

        size = dc.GetSize()
        dc.SetPen(wx.Pen(self._backColour, 1))
        dc.SetBrush(wx.Brush(self._backColour))
        dc.DrawRectangle(0, 0, size[0], size[1])
        ptx, pty, rectWidth, rectHeight = self._point2ClientCoord(p1, p2)
        if self._background_bitmap is not None and CeciliaLib.getVar("graphTexture"):
            if size != self._oldSize:
                self._scaled_background_bitmap = self._background_bitmap.GetSubBitmap(wx.Rect(0, 0, int(rectWidth), int(rectHeight)))
                self._oldSize = size
            dc.DrawBitmap(self._scaled_background_bitmap, int(ptx), int(pty))

        self._drawAxes(dc, p1, p2, scale, shift, xticks, yticks)

        graphics.scaleAndShift(scale, shift)

        # set clipping area so drawing does not occur outside axis box
        ptx, pty, rectWidth, rectHeight = self._point2ClientCoord(p1, p2)
        dc.SetClippingRegion(int(ptx) - 5, int(pty) - 5, int(rectWidth) + 10, int(rectHeight) + 10)

        # Draw the lines and markers
        graphics.draw(gc)

        # Draw position values on graph ------------------------------
        pos1, pos2 = self._onePoint2ClientCoord(self._posToDrawValues)
        dc.DrawText(self._Xvalue, int(pos1), int(pos2) - 30)
        dc.DrawText(self._Yvalue, int(pos1), int(pos2) - 20)

        # Draw selection marquee ------------------------------
        if self._selectionCorner1 is not None:
            x, y, w, h = self._point2ClientCoord(self._selectionCorner1, self._selectionCorner2)
            dc.SetPen(wx.Pen(wx.BLACK))
            dc.SetBrush(wx.Brush(wx.WHITE, wx.TRANSPARENT))
            rect = wx.Rect(int(x), int(y), int(w), int(h))
            dc.DrawRectangle(rect)

        # remove the clipping region
        dc.DestroyClippingRegion()

        self._adjustScrollbars()

    def Redraw(self, dc=None):
        """Redraw the existing plot."""
        if self.last_draw is not None:
            graphics, xAxis, yAxis = self.last_draw
            self._Draw(graphics, xAxis, yAxis, dc)

    def Clear(self):
        """Erase the window."""
        self.last_PointLabel = None        #reset pointLabel
        dc = wx.BufferedDC(wx.ClientDC(self.canvas), self._Buffer)
        dc.Clear()
        self.last_draw = None

    def Zoom(self, Center, Ratio):
        """ Zoom on the plot
            Centers on the X, Y coords given in Center
            Zooms by the Ratio = (Xratio, Yratio) given
        """
        self.last_PointLabel = None   #reset maker
        x, y = Center
        if self.last_draw is not None:
            (graphics, xAxis, yAxis) = self.last_draw
            w = (xAxis[1] - xAxis[0]) * Ratio[0]
            h = (yAxis[1] - yAxis[0]) * Ratio[1]
            xAxis = (x - w / 2, x + w / 2)
            yAxis = (y - h / 2, y + h / 2)
            self._Draw(graphics, xAxis, yAxis)

    def GetClosestPointOnCurve(self, pntXY, label, pointScaled=True):
        """Returns list with
            [curveNumber, legend, index of closest point, pointXY, scaledXY, distance]
            list for the specified curve.
            Returns [] if no curves are being plotted.

            x, y in user coords
            if pointScaled == True based on screen coords
            if pointScaled == False based on user coords
        """
        if self.last_draw is None:
            #no graph available
            return []
        graphics, xAxis, yAxis = self.last_draw
        labels = [obj.getLegend() for obj in graphics]
        curveNum = labels.index(label)
        obj = graphics[curveNum]
        #check there are points in the curve
        if len(obj.points) == 0:
            return []
        #[curveNumber, legend, index of closest point, pointXY, scaledXY, distance]
        cn = [curveNum] + [obj.getLegend()] + obj.getClosestPoint(pntXY, pointScaled)
        return cn

    def GetClosestPoints(self, pntXY, pointScaled=True):
        """Returns list with
            [curveNumber, legend, index of closest point, pointXY, scaledXY, distance]
            list for each curve.
            Returns [] if no curves are being plotted.

            x, y in user coords
            if pointScaled == True based on screen coords
            if pointScaled == False based on user coords
        """
        if self.last_draw is None:
            #no graph available
            return []
        graphics, xAxis, yAxis = self.last_draw
        l = []
        for curveNum, obj in enumerate(graphics):
            #check there are points in the curve
            if len(obj.points) == 0:
                continue  #go to next obj
            #[curveNumber, legend, index of closest point, pointXY, scaledXY, distance]
            cn = [curveNum] + [obj.getLegend()] + obj.getClosestPoint(pntXY, pointScaled)
            l.append(cn)
        return l

    def GetClosestPoint(self, pntXY, pointScaled=True):
        """Returns list with
            [curveNumber, legend, index of closest point, pointXY, scaledXY, distance]
            list for only the closest curve.
            Returns [] if no curves are being plotted.

            x, y in user coords
            if pointScaled == True based on screen coords
            if pointScaled == False based on user coords
        """
        #closest points on screen based on screen scaling (pointScaled= True)
        #list [curveNumber, index, pointXY, scaledXY, distance] for each curve
        closestPts = self.GetClosestPoints(pntXY, pointScaled)
        if closestPts == []:
            return []  #no graph present
        #find one with least distance
        dists = [c[-1] for c in closestPts]
        mdist = min(dists)  #Min dist
        i = dists.index(mdist)  #index for min dist
        return closestPts[i]  #this is the closest point on closest curve

    def UpdatePointLabel(self, mDataDict):
        """Updates the pointLabel point on screen with data contained in
            mDataDict.

            mDataDict will be passed to your function set by
            SetPointLabelFunc.  It can contain anything you
            want to display on the screen at the scaledXY point
            you specify.

            This function can be called from parent window with onClick,
            onMotion events etc.
        """
        if self.last_PointLabel is not None:
            #compare pointXY
            if _Numeric.sometrue(mDataDict["pointXY"] != self.last_PointLabel["pointXY"]):
                #closest changed
                self._drawPointLabel(self.last_PointLabel) #erase old
                self._drawPointLabel(mDataDict) #plot new
        else:
            #just plot new with no erase
            self._drawPointLabel(mDataDict) #plot new
        #save for next erase
        self.last_PointLabel = mDataDict

    # event handlers **********************************
    def OnMotion(self, event):
        if self._zoomEnabled and event.LeftIsDown():
            if self._hasDragged:
                self._drawRubberBand(self._zoomCorner1, self._zoomCorner2) # remove old
            else:
                self._hasDragged = True
            self._zoomCorner2[0], self._zoomCorner2[1] = self._getXY(event)
            self._drawRubberBand(self._zoomCorner1, self._zoomCorner2) # add new
        elif self._dragEnabled and event.LeftIsDown():
            coordinates = event.GetPosition()
            newpos, oldpos = map(_Numeric.array, map(self.PositionScreenToUser, [coordinates, self._screenCoordinates]))
            dist = newpos - oldpos
            self._screenCoordinates = coordinates

            if self.last_draw is not None:
                graphics, xAxis, yAxis = self.last_draw
                yAxis -= dist[1]
                xAxis -= dist[0]
                self._Draw(graphics, xAxis, yAxis)

    def OnMouseLeftDown(self, event):
        self._zoomCorner1[0], self._zoomCorner1[1] = self._getXY(event)
        self._screenCoordinates = _Numeric.array(event.GetPosition())
        if self._dragEnabled:
            self.SetCursor(self.GrabHandCursor)
            self.canvas.CaptureMouse()

    def OnMouseLeftUp(self, event):
        if self._zoomEnabled:
            if self._hasDragged:
                self._drawRubberBand(self._zoomCorner1, self._zoomCorner2) # remove old
                self._zoomCorner2[0], self._zoomCorner2[1] = self._getXY(event)
                self._hasDragged = False  # reset flag
                minX, minY = _Numeric.minimum(self._zoomCorner1, self._zoomCorner2)
                maxX, maxY = _Numeric.maximum(self._zoomCorner1, self._zoomCorner2)
                self.last_PointLabel = None        #reset pointLabel
                if self.last_draw is not None:
                    self._Draw(self.last_draw[0], xAxis=(minX, maxX), yAxis=(minY, maxY), dc=None)
        if self._dragEnabled:
            self.SetCursor(self.HandCursor)
            if self.canvas.HasCapture():
                self.canvas.ReleaseMouse()

    def OnMouseDoubleClick(self, event):
        if self._zoomEnabled:
            # Give a little time for the click to be totally finished
            # before (possibly) removing the scrollbars and trigering
            # size events, etc.
            wx.CallLater(250, self.Reset)

    def OnMouseRightDown(self, event):
        if self._zoomEnabled:
            X, Y = self._getXY(event)
            self.Zoom((X, Y), (self._zoomOutFactor, self._zoomOutFactor))

    def OnPaint(self, event):
        # All that is needed here is to draw the buffer to screen
        if self.last_PointLabel is not None:
            self._drawPointLabel(self.last_PointLabel) #erase old
            self.last_PointLabel = None
        dc = wx.BufferedPaintDC(self.canvas, self._Buffer)

    def OnSize(self, event):
        # The Buffer init is done here, to make sure the buffer is always
        # the same size as the Window
        size = self.canvas.GetClientSize()
        size.width = max(1, size.width)
        size.height = max(1, size.height)

        # Make new offscreen bitmap: this bitmap will always have the
        # current drawing in it, so it can be used to save the image to
        # a file, or whatever.
        self._Buffer = wx.EmptyBitmap(size.width, size.height)

        if not self._isWindowCreated:
            return

        self._setSize()

        self.last_PointLabel = None        #reset pointLabel

        if self.last_draw is None:
            self.Clear()
        else:
            self._clientSize = size
            graphics, xSpec, ySpec = self.last_draw
            self._Draw(graphics, xSpec, ySpec)

    def OnLeave(self, event):
        """Used to erase pointLabel when mouse outside window"""
        if self.last_PointLabel is not None:
            self._drawPointLabel(self.last_PointLabel) #erase old
            self.last_PointLabel = None

    def OnScroll(self, evt):
        if not self._adjustingSB:
            self._sb_ignore = True
            sbpos = evt.GetPosition()

            if evt.GetOrientation() == wx.VERTICAL:
                fullrange, pagesize = self.sb_vert.GetRange(), self.sb_vert.GetPageSize()
                sbpos = fullrange - pagesize - sbpos
                dist = sbpos * self._sb_yunit - (self._getYCurrentRange()[0] - self._sb_yfullrange[0])
                self.ScrollUp(dist)

            if evt.GetOrientation() == wx.HORIZONTAL:
                dist = sbpos * self._sb_xunit - (self._getXCurrentRange()[0] - self._sb_xfullrange[0])
                self.ScrollRight(dist)

    # Private Methods **************************************************
    def drawCursor(self, time):
        pt = time * self._pointScale + self._pointShift
        try:
            self.time = pt[0]
        except:
            pass
        self.GetParent().cursorPanel.setTime(self.time)

    def _setSize(self, width=None, height=None):
        """DC width and height."""
        if width is None:
            (self.width, self.height) = self.canvas.GetClientSize()
        else:
            self.width, self.height = width, height
        self.plotbox_size = 0.97 * _Numeric.array([self.width, self.height])
        xo = 0.5 * (self.width - self.plotbox_size[0])
        yo = self.height - 0.5 * (self.height - self.plotbox_size[1])
        self.plotbox_origin = _Numeric.array([xo, yo])

    def _drawPointLabel(self, mDataDict):
        """Draws and erases pointLabels"""
        width = self._Buffer.GetWidth()
        height = self._Buffer.GetHeight()
        tmp_Buffer = wx.EmptyBitmap(width, height)
        dcs = wx.MemoryDC()
        dcs.SelectObject(tmp_Buffer)
        dcs.Clear()
        self._pointLabelFunc(dcs, mDataDict)  #custom user pointLabel function

        dc = wx.ClientDC(self.canvas)
        #this will erase if called twice
        dc.Blit(0, 0, width, height, dcs, 0, 0, wx.EQUIV)  #(NOT src) XOR dst

    def _drawLegend(self, dc, graphics, rhsW, topH, legendBoxWH, legendSymExt, legendTextExt):
        """Draws legend symbols and text"""
        # top right hand corner of graph box is ref corner
        trhc = self.plotbox_origin + (self.plotbox_size - [rhsW, topH]) * [.87, -1]
        #legendLHS= .091* legendBoxWH[0]  # border space between legend sym and graph box
        legendLHS = legendBoxWH[0] - 80 # border space between legend sym and graph box
        lineHeight = max(legendSymExt[1], legendTextExt[1]) * 1.1 #1.1 used as space between lines
        dc.SetFont(self._getFont(self._fontSizeLegend))
        for i in range(len(graphics)):
            o = graphics[i]
            s = i * lineHeight
            if isinstance(o, PolyMarker):
                pass
                # draw marker with legend
                #pnt= (trhc[0]+legendLHS+legendSymExt[0]/2., trhc[1]+s+lineHeight/2.)
                #o.draw(dc, coord= _Numeric.array([pnt]))
            elif isinstance(o, PolyLine):
                pass
                # draw line with legend
                #pnt1= (trhc[0]+legendLHS, trhc[1]+s+lineHeight/2.)
                #pnt2= (trhc[0]+legendLHS+legendSymExt[0], trhc[1]+s+lineHeight/2.)
                #o.draw(dc, coord= _Numeric.array([pnt1, pnt2]))
            else:
                raise TypeError("object is neither PolyMarker or PolyLine instance.")
            # draw legend txt
            pnt = (trhc[0] + legendLHS + legendSymExt[0], trhc[1] + s + lineHeight / 2. - legendTextExt[1] / 2)
            dc.SetTextForeground(o.getColour())
            dc.DrawText(o.getLegend(), pnt[0] + 3, pnt[1])
        dc.SetFont(self._getFont(self._fontSizeAxis)) # reset

    def _titleLablesWH(self, dc, graphics):
        """Draws Title and labels and returns width and height for each"""
        # TextExtents for Title and Axis Labels
        dc.SetFont(self._getFont(self._fontSizeTitle))
        if self._titleEnabled:
            title = graphics.getTitle()
            titleWH = dc.GetTextExtent(title)
        else:
            titleWH = (0, 0)
        dc.SetFont(self._getFont(self._fontSizeAxis))
        xLabel, yLabel = graphics.getXLabel(), graphics.getYLabel()
        xLabelWH = dc.GetTextExtent(xLabel)
        yLabelWH = dc.GetTextExtent(yLabel)
        return titleWH, xLabelWH, yLabelWH

    def _legendWH(self, dc, graphics):
        """Returns the size in screen units for legend box"""
        if not self._legendEnabled:
            legendBoxWH = symExt = txtExt = (0, 0)
        else:
            # find max symbol size
            symExt = graphics.getSymExtent()
            # find max legend text extent
            dc.SetFont(self._getFont(self._fontSizeLegend))
            txtList = graphics.getLegendNames()
            txtExt = dc.GetTextExtent(txtList[0])
            for txt in graphics.getLegendNames()[1:]:
                txtExt = _Numeric.maximum(txtExt, dc.GetTextExtent(txt))
            maxW = symExt[0] + txtExt[0]
            maxH = max(symExt[1], txtExt[1])
            # padding .1 for lhs of legend box and space between lines
            maxW = maxW * 1.1
            maxH = maxH * 1.1 * len(txtList)
            dc.SetFont(self._getFont(self._fontSizeAxis))
            legendBoxWH = (maxW, maxH)
        return (legendBoxWH, symExt, txtExt)

    def _drawRubberBand(self, corner1, corner2):
        """Draws/erases rect box from corner1 to corner2"""
        ptx, pty, rectWidth, rectHeight = self._point2ClientCoord(corner1, corner2)
        # draw rectangle
        dc = wx.ClientDC(self.canvas)
        dc.SetPen(wx.Pen(wx.BLACK))
        dc.SetBrush(wx.Brush(wx.WHITE, wx.TRANSPARENT))
        dc.SetLogicalFunction(wx.INVERT)
        dc.DrawRectangle(int(ptx), int(pty), int(rectWidth), int(rectHeight))
        dc.SetLogicalFunction(wx.COPY)

    def _getFont(self, size):
        """Take font size and returns wx.Font"""
        return wx.Font(size, wx.FONTFAMILY_SWISS, wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL)

    def _onePoint2ClientCoord(self, corner1):
        """Converts user point coords to client screen int coords x, y, width, height"""
        c1 = _Numeric.array(corner1)
        # convert to screen coords
        pt1 = c1 * self._pointScale + self._pointShift
        ptx, pty = pt1
        return ptx, pty

    def _point2ClientCoord(self, corner1, corner2):
        """Converts user point coords to client screen int coords x, y, width, height"""
        c1 = _Numeric.array(corner1)
        c2 = _Numeric.array(corner2)
        # convert to screen coords
        pt1 = c1 * self._pointScale + self._pointShift
        pt2 = c2 * self._pointScale + self._pointShift
        # make height and width positive
        pul = _Numeric.minimum(pt1, pt2) # Upper left corner
        plr = _Numeric.maximum(pt1, pt2) # Lower right corner
        rectWidth, rectHeight = plr - pul
        ptx, pty = pul
        return ptx, pty, rectWidth, rectHeight

    def _axisInterval(self, spec, lower, upper):
        """Returns sensible axis range for given spec"""
        if spec == 'none' or spec == 'min':
            if lower == upper:
                return lower - 0.5, upper + 0.5
            else:
                return lower, upper
        elif spec == 'auto':
            range = upper - lower
            if range == 0.:
                return lower - 0.5, upper + 0.5
            log = _Numeric.log10(range)
            power = _Numeric.floor(log)
            fraction = log - power
            if fraction <= 0.05:
                power = power - 1
            grid = 10. ** power
            lower = lower - lower % grid
            mod = upper % grid
            if mod != 0:
                upper = upper - mod + grid
            return lower, upper
        elif isinstance(spec, tuple):
            lower, upper = spec
            if lower <= upper:
                return lower, upper
            else:
                return upper, lower
        else:
            raise ValueError(str(spec) + ': illegal axis specification.')

    def _drawAxes(self, dc, p1, p2, scale, shift, xticks, yticks):
        dc.SetPen(wx.Pen(self._gridColour, 1))

        # set length of tick marks--long ones make grid
        if self._gridEnabled:
            x, y, width, height = self._point2ClientCoord(p1, p2)
            if self._gridEnabled == 'Horizontal':
                yTickLength = width / 2.0 + 1
                xTickLength = 3
            elif self._gridEnabled == 'Vertical':
                yTickLength = 3
                xTickLength = height / 2.0 + 1
            else:
                yTickLength = width / 2.0 + 1
                xTickLength = height / 2.0 + 1
        else:
            yTickLength = 3
            xTickLength = 3

        ### little speed improvment in drawing axes. - O.B. ###
        if self._xSpec != 'none':
            lower, upper = p1[0], p2[0]
            text = 1
            for y, d in [(p1[1], -xTickLength), (p2[1], xTickLength)]:   # miny, maxy and tick lengths
                a1 = scale * _Numeric.array([lower, y]) + shift
                a2 = scale * _Numeric.array([upper, y]) + shift
                dc.DrawLine(int(a1[0]), int(a1[1]), int(a2[0]), int(a2[1]))  # draws upper and lower axis line

                pts = [scale * _Numeric.array([x, y]) + shift for x, label in xticks]
                pts_line = [(int(pt[0]), int(pt[1]), int(pt[0]), int(pt[1] + d)) for pt in pts]
                dc.DrawLineList(pts_line)
                if text:
                    labels = [label for x, label in xticks]
                    pts2 = [[int(x[0]), int(x[1])] for x in pts]
                    dc.DrawTextList(labels, pts2)

                # for x, label in xticks:
                #     pt = scale*_Numeric.array([x, y])+shift
                #     dc.DrawLine(pt[0], pt[1], pt[0], pt[1] + d) # draws tick mark d units
                #     if text:
                #         dc.DrawText(label, pt[0], pt[1])

                text = 0  # axis values not drawn on top side

        if self._ySpec != 'none':
            lower, upper = p1[1], p2[1]
            text = 1
            h = dc.GetCharHeight() * 0.5
            for x, d in [(p1[0], -yTickLength), (p2[0], yTickLength)]:
                a1 = scale * _Numeric.array([x, lower]) + shift
                a2 = scale * _Numeric.array([x, upper]) + shift
                dc.DrawLine(int(a1[0]), int(a1[1]), int(a2[0]), int(a2[1]))

                pts = [scale * _Numeric.array([x, y]) + shift for y, label in yticks]
                pts_line = [(int(pt[0]), int(pt[1]), int(pt[0] - d), int(pt[1])) for pt in pts]
                dc.DrawLineList(pts_line)
                if text:
                    labels = [label for y, label in yticks]
                    labels_coords = [(int(pt[0] - dc.GetTextExtent(labels[i])[0] - 2), int(pt[1] - h)) for i, pt in enumerate(pts)]
                    dc.DrawTextList(labels, labels_coords)

                # for y, label in yticks:
                #     pt = scale*_Numeric.array([x, y])+shift
                #     dc.DrawLine(pt[0], pt[1], pt[0]-d, pt[1])
                #     if text:
                #         dc.DrawText(label, pt[0]-dc.GetTextExtent(label)[0]-2, pt[1]-0.5*h)

                text = 0    # axis values not drawn on right side

    def _xticks(self, *args):
        if self._logscale[0]:
            return self._logticks(*args)
        else:
            return self._ticks(*args)

    def _yticks(self, *args):
        if self._logscale[1]:
            return self._logticks(*args)
        else:
            return self._ticks(*args)

    def _logticks(self, lower, upper):
        #lower, upper = map(_Numeric.log10, [lower, upper])
        #print('logticks', lower, upper)
        ticks = []
        mag = _Numeric.power(10, _Numeric.floor(lower))
        if upper - lower > 6:
            t = _Numeric.power(10, _Numeric.ceil(lower))
            base = _Numeric.power(10, _Numeric.floor((upper - lower) / 6))
            def inc(t):
                return t * base - t
        else:
            t = _Numeric.ceil(_Numeric.power(10, lower) / mag) * mag
            def inc(t):
                return 10 ** int(_Numeric.floor(_Numeric.log10(t) + 1e-16))
        majortick = int(_Numeric.log10(mag))
        while t <= pow(10, upper):
            if majortick != int(_Numeric.floor(_Numeric.log10(t) + 1e-16)):
                majortick = int(_Numeric.floor(_Numeric.log10(t) + 1e-16))
                ticklabel = '1e%d' % majortick
                ############# mine ############
                if not self.GetUseScientificNotation():
                    ticklabel = str(int(float(ticklabel)))
            else:
                if upper - lower < 2:
                    minortick = int(t / pow(10, majortick) + .5)
                    ticklabel = '%de%d' % (minortick, majortick)
                    ############# mine ############
                    if not self.GetUseScientificNotation():
                        ticklabel = str(int(float(ticklabel)))
                else:
                    ticklabel = ''
            ticks.append((_Numeric.log10(t), ticklabel))
            t += inc(t)
        if len(ticks) == 0:
            ticks = [(0, '')]
        return ticks

    def _ticks(self, lower, upper):
        ideal = (upper - lower) / 7.
        log = _Numeric.log10(ideal)
        power = _Numeric.floor(log)
        fraction = log - power
        factor = 1.
        error = fraction
        for f, lf in self._multiples:
            e = _Numeric.fabs(fraction - lf)
            if e < error:
                error = e
                factor = f
        grid = factor * 10. ** power
        if self._useScientificNotation and (power > 4 or power < -4):
            format = '%+7.1e'
        elif power >= 0:
            digits = max(1, int(power))
            format = '%' + repr(digits) + '.0f'
        else:
            digits = -int(power)
            format = '%' + repr(digits + 2) + '.' + repr(digits) + 'f'
        ticks = []
        t = -grid * _Numeric.floor(-lower / grid)
        while t <= upper:
            ticks.append((t, format % (t,)))
            t = t + grid
        return ticks

    _multiples = [(2., _Numeric.log10(2.)), (5., _Numeric.log10(5.))]

    def _adjustScrollbars(self):
        if self._sb_ignore:
            self._sb_ignore = False
            return

        if not self.GetShowScrollbars():
            return

        self._adjustingSB = True
        needScrollbars = False

        # horizontal scrollbar
        r_current = self._getXCurrentRange()
        r_max = list(self._getXMaxRange())
        sbfullrange = float(self.sb_hor.GetRange())

        r_max[0] = min(r_max[0], r_current[0])
        r_max[1] = max(r_max[1], r_current[1])

        self._sb_xfullrange = r_max

        unit = (r_max[1] - r_max[0]) / float(self.sb_hor.GetRange())
        pos = int((r_current[0] - r_max[0]) / unit)

        if pos >= 0:
            pagesize = int((r_current[1] - r_current[0]) / unit)

            self.sb_hor.SetScrollbar(pos, pagesize, sbfullrange, pagesize)
            self._sb_xunit = unit
            needScrollbars = needScrollbars or (pagesize != sbfullrange)
        else:
            self.sb_hor.SetScrollbar(0, 1000, 1000, 1000)

        # vertical scrollbar
        r_current = self._getYCurrentRange()
        r_max = list(self._getYMaxRange())
        sbfullrange = float(self.sb_vert.GetRange())

        r_max[0] = min(r_max[0], r_current[0])
        r_max[1] = max(r_max[1], r_current[1])

        self._sb_yfullrange = r_max

        unit = (r_max[1] - r_max[0]) / sbfullrange
        pos = int((r_current[0] - r_max[0]) / unit)

        if pos >= 0:
            pagesize = int((r_current[1] - r_current[0]) / unit)
            pos = (sbfullrange - 1 - pos - pagesize)
            self.sb_vert.SetScrollbar(pos, pagesize, sbfullrange, pagesize)
            self._sb_yunit = unit
            needScrollbars = needScrollbars or (pagesize != sbfullrange)
        else:
            self.sb_vert.SetScrollbar(0, 1000, 1000, 1000)

        self.SetShowScrollbars(needScrollbars)
        self._adjustingSB = False
