#-----------------------------------------------------------------------------
# Name: wx.lib.plot.py
-# Purpose:
+# Purpose: Line, Bar and Scatter Graphs
#
# Author: Gordon Williams
#
#
# 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. 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
+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
Right mouse click - zoom out centred on click location.
"""
-import string
-import time
+import string as _string
+import time as _time
import wx
-# Needs Numeric
+# Needs Numeric or numarray
try:
- import Numeric
+ import Numeric as _Numeric
except:
try:
- import numarray as Numeric #if numarray is used it is renamed Numeric
+ import numarray as _Numeric #if numarray is used it is renamed Numeric
except:
msg= """
This module requires the Numeric or numarray module,
"""
def __init__(self, points, attr):
- self.points = Numeric.array(points)
+ self.points = _Numeric.array(points)
self.currentScale= (1,1)
self.currentShift= (0,0)
self.scaled = self.points
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,-1])
- maxXY= Numeric.array([ 1, 1])
+ minXY= _Numeric.array([-1,-1])
+ maxXY= _Numeric.array([ 1, 1])
else:
- minXY= Numeric.minimum.reduce(self.points)
- maxXY= Numeric.maximum.reduce(self.points)
+ minXY= _Numeric.minimum.reduce(self.points)
+ maxXY= _Numeric.maximum.reduce(self.points)
return minXY, maxXY
def scaleAndShift(self, scale=(1,1), shift=(0,0)):
def getLegend(self):
return self.attributes['legend']
-
+ 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 == True:
+ #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.
colour = self.attributes['colour']
width = self.attributes['width'] * printerScale
style= self.attributes['style']
- dc.SetPen(wx.Pen(wx.NamedColour(colour), int(width), style))
+ pen = wx.Pen(wx.NamedColour(colour), width, style)
+ pen.SetCap(wx.CAP_BUTT)
+ dc.SetPen(pen)
if coord == None:
dc.DrawLines(self.scaled)
else:
fillstyle = self.attributes['fillstyle']
marker = self.attributes['marker']
- dc.SetPen(wx.Pen(wx.NamedColour(colour),int(width)))
+ dc.SetPen(wx.Pen(wx.NamedColour(colour), width))
if fillcolour:
dc.SetBrush(wx.Brush(wx.NamedColour(fillcolour),fillstyle))
else:
def _circle(self, dc, coords, size=1):
fact= 2.5*size
wh= 5.0*size
- rect= Numeric.zeros((len(coords),4),Numeric.Float)+[0.0,0.0,wh,wh]
+ rect= _Numeric.zeros((len(coords),4),_Numeric.Float)+[0.0,0.0,wh,wh]
rect[:,0:2]= coords-[fact,fact]
- dc.DrawEllipseList(rect.astype(Numeric.Int32))
+ dc.DrawEllipseList(rect.astype(_Numeric.Int32))
def _dot(self, dc, coords, size=1):
dc.DrawPointList(coords)
def _square(self, dc, coords, size=1):
fact= 2.5*size
wh= 5.0*size
- rect= Numeric.zeros((len(coords),4),Numeric.Float)+[0.0,0.0,wh,wh]
+ rect= _Numeric.zeros((len(coords),4),_Numeric.Float)+[0.0,0.0,wh,wh]
rect[:,0:2]= coords-[fact,fact]
- dc.DrawRectangleList(rect.astype(Numeric.Int32))
+ dc.DrawRectangleList(rect.astype(_Numeric.Int32))
def _triangle(self, dc, coords, size=1):
shape= [(-2.5*size,1.44*size), (2.5*size,1.44*size), (0.0,-2.88*size)]
- poly= Numeric.repeat(coords,3)
+ poly= _Numeric.repeat(coords,3)
poly.shape= (len(coords),3,2)
poly += shape
- dc.DrawPolygonList(poly.astype(Numeric.Int32))
+ dc.DrawPolygonList(poly.astype(_Numeric.Int32))
def _triangle_down(self, dc, coords, size=1):
shape= [(-2.5*size,-1.44*size), (2.5*size,-1.44*size), (0.0,2.88*size)]
- poly= Numeric.repeat(coords,3)
+ poly= _Numeric.repeat(coords,3)
poly.shape= (len(coords),3,2)
poly += shape
- dc.DrawPolygonList(poly.astype(Numeric.Int32))
+ dc.DrawPolygonList(poly.astype(_Numeric.Int32))
def _cross(self, dc, coords, size=1):
fact= 2.5*size
for f in [[-fact,-fact,fact,fact],[-fact,fact,fact,-fact]]:
- lines= Numeric.concatenate((coords,coords),axis=1)+f
- dc.DrawLineList(lines.astype(Numeric.Int32))
+ lines= _Numeric.concatenate((coords,coords),axis=1)+f
+ dc.DrawLineList(lines.astype(_Numeric.Int32))
def _plus(self, dc, coords, size=1):
fact= 2.5*size
for f in [[-fact,0,fact,0],[0,-fact,0,fact]]:
- lines= Numeric.concatenate((coords,coords),axis=1)+f
- dc.DrawLineList(lines.astype(Numeric.Int32))
+ lines= _Numeric.concatenate((coords,coords),axis=1)+f
+ dc.DrawLineList(lines.astype(_Numeric.Int32))
class PlotGraphics:
"""Container to hold PolyXXX objects and graph labels
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)
+ p1 = _Numeric.minimum(p1, p1o)
+ p2 = _Numeric.maximum(p2, p2o)
return p1, p2
def scaleAndShift(self, scale=(1,1), shift=(0,0)):
def draw(self, dc):
for o in self.objects:
- #t=time.clock() # profile info
+ #t=_time.clock() # profile info
o.draw(dc, self.printerScale)
- #dt= time.clock()-t
+ #dt= _time.clock()-t
#print o, "time=", dt
def getSymExtent(self, printerScale):
symExt = self.objects[0].getSymExtent(printerScale)
for o in self.objects[1:]:
oSymExt = o.getSymExtent(printerScale)
- symExt = Numeric.maximum(symExt, oSymExt)
+ symExt = _Numeric.maximum(symExt, oSymExt)
return symExt
def getLegendNames(self):
# 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._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
self._fontSizeTitle= 15
self._fontSizeLegend= 7
+ # pointLabels
+ self._pointLabelEnabled= False
+ self.last_PointLabel= None
+ self._pointLabelFunc= None
+ self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeave)
+
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.Bind(wx.EVT_SIZE, self.OnSize)
# OnSize called to make sure the buffer is initialized.
# This might result in OnSize getting called twice on some
# platforms at initialization, but little harm done.
- if wx.Platform != "__WXMAC__":
- self.OnSize(None) # sets the initial size based on client size
+ if wx.Platform != "__WXMAC__":
+ self.OnSize(None) # sets the initial size based on client size
# SaveFile
.png Save a Portable Network Graphics file.
.jpg Save a Joint Photographic Experts Group file.
"""
- if string.lower(fileName[-3:]) not in ['bmp','xbm','xpm','png','jpg']:
+ if _string.lower(fileName[-3:]) not in ['bmp','xbm','xpm','png','jpg']:
dlg1 = wx.FileDialog(
self,
"Choose a file with extension bmp, gif, xbm, xpm, png, or jpg", ".", "",
if dlg1.ShowModal() == wx.ID_OK:
fileName = dlg1.GetPath()
# Check for proper exension
- if string.lower(fileName[-3:]) not in ['bmp','xbm','xpm','png','jpg']:
+ if _string.lower(fileName[-3:]) not in ['bmp','xbm','xpm','png','jpg']:
dlg2 = wx.MessageDialog(self, 'File name extension\n'
'must be one of\n'
'bmp, xbm, xpm, png, or jpg',
dlg1.Destroy()
# File name has required extension
- fType = string.lower(fileName[-3:])
+ fType = _string.lower(fileName[-3:])
if fType == "bmp":
tp= wx.BITMAP_TYPE_BMP # Save a Windows bitmap file.
elif fType == "xbm":
self.pageSetupData.SetMarginBottomRight(data.GetMarginBottomRight())
self.pageSetupData.SetMarginTopLeft(data.GetMarginTopLeft())
self.pageSetupData.SetPrintData(data.GetPrintData())
- self.print_data=data.GetPrintData() # updates print_data
+ self.print_data=wx.PrintData(data.GetPrintData()) # updates print_data
finally:
dlg.Destroy()
"""Print current plot."""
if paper != None:
self.print_data.SetPaperId(paper)
- pdd = wx.PrintDialogData()
- pdd.SetPrintData(self.print_data)
+ pdd = wx.PrintDialogData(self.print_data)
printer = wx.Printer(pdd)
out = PlotPrintout(self)
print_ok = printer.Print(self.parent, out)
if print_ok:
- self.print_data = printer.GetPrintDialogData().GetPrintData()
+ self.print_data = wx.PrintData(printer.GetPrintDialogData().GetPrintData())
out.Destroy()
def PrintPreview(self):
wx.MessageDialog(self, "Print Preview failed.\n" \
"Check that default printer is configured\n", \
"Print error", wx.OK|wx.CENTRE).ShowModal()
- self.preview.SetZoom(30)
+ self.preview.SetZoom(40)
# search up tree to find frame instance
frameInst= self
while not isinstance(frameInst, wx.Frame):
frame = wx.PreviewFrame(self.preview, frameInst, "Preview")
frame.Initialize()
frame.SetPosition(self.GetPosition())
- frame.SetSize((500,400))
+ frame.SetSize((600,550))
frame.Centre(wx.BOTH)
frame.Show(True)
def SetEnableGrid(self, value):
"""Set True to enable grid."""
- if value not in [True,False]:
- raise TypeError, "Value should be True or False"
+ if value not in [True,False,'Horizontal','Vertical']:
+ raise TypeError, "Value should be True, False, Horizontal or Vertical"
self._gridEnabled= value
self.Redraw()
"""True if Legend enabled."""
return self._legendEnabled
+ 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)
def ScrollUp(self, units):
"""Move view up number of axis units."""
- 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)
+ 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):
"""Takes a mouse event and returns the XY user axis values."""
- screenPos= Numeric.array( event.GetPosition())
- x,y= (screenPos-self._pointShift)/self._pointScale
+ 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:
return
if dc == None:
- # allows using floats for certain functions
- dc = FloatDCWrapper(wx.BufferedDC(wx.ClientDC(self), self._Buffer))
+ # sets new dc and clears it
+ dc = wx.BufferedDC(wx.ClientDC(self), self._Buffer)
dc.Clear()
dc.BeginDrawing()
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)
+ 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, xAxis, yAxis) # saves most recient values
lhsW= yTextExtent[0]+ yLabelWH[1]
bottomH= max(xTextExtent[1], yTextExtent[1]/2.)+ xLabelWH[1]
topH= yTextExtent[1]/2. + titleWH[1]
- textSize_scale= Numeric.array([rhsW+lhsW,bottomH+topH]) # make plot area smaller by text size
- textSize_shift= Numeric.array([lhsW, bottomH]) # shift plot area by this amount
+ textSize_scale= _Numeric.array([rhsW+lhsW,bottomH+topH]) # make plot area smaller by text size
+ textSize_shift= _Numeric.array([lhsW, bottomH]) # shift plot area by this amount
# drawing title and labels text
dc.SetFont(self._getFont(self._fontSizeTitle))
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))
+ 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
self._drawAxes(dc, p1, p2, scale, shift, xticks, yticks)
ptx,pty,rectWidth,rectHeight= self._point2ClientCoord(p1, p2)
dc.SetClippingRegion(ptx,pty,rectWidth,rectHeight)
# Draw the lines and markers
- #start = time.clock()
+ #start = _time.clock()
graphics.draw(dc)
- # print "entire graphics drawing took: %f second"%(time.clock() - start)
+ # print "entire graphics drawing took: %f second"%(_time.clock() - start)
# remove the clipping region
dc.DestroyClippingRegion()
dc.EndDrawing()
def Clear(self):
"""Erase the window."""
+ self.last_PointLabel = None #reset pointLabel
dc = wx.BufferedDC(wx.ClientDC(self), self._Buffer)
dc.Clear()
self.last_draw = None
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 != None:
(graphics, xAxis, yAxis) = self.last_draw
yAxis = ( y - h/2, y + h/2 )
self.Draw(graphics, xAxis, yAxis)
+ 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 == 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 GetClosetPoint(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 != None:
+ #compare pointXY
+ if 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):
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)
+ 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 != None:
self.Draw(self.last_draw[0], xAxis = (minX,maxX), yAxis = (minY,maxY), dc = None)
#else: # A box has not been drawn, zoom in on a point
def OnPaint(self, event):
# All that is needed here is to draw the buffer to screen
- dc = wx.BufferedPaintDC(self, self._Buffer)
+ if self.last_PointLabel != None:
+ self._drawPointLabel(self.last_PointLabel) #erase old
+ self.last_PointLabel = None
+ dc = wx.BufferedPaintDC(self, 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.GetClientSize()
-
+ if Size.width <= 0 or Size.height <= 0:
+ return
+
# 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[0],Size[1])
self._setSize()
+
+ self.last_PointLabel = None #reset pointLabel
+
if self.last_draw is None:
self.Clear()
else:
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 != None:
+ self._drawPointLabel(self.last_PointLabel) #erase old
+ self.last_PointLabel = None
+
# Private Methods **************************************************
def _setSize(self, width=None, height=None):
(self.width,self.height) = self.GetClientSize()
else:
self.width, self.height= width,height
- self.plotbox_size = 0.97*Numeric.array([self.width, self.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])
+ self.plotbox_origin = _Numeric.array([xo, yo])
def _setPrinterScale(self, scale):
"""Used to thicken lines and increase marker size for print out."""
graphics, xSpec, ySpec= self.last_draw
self.Draw(graphics,xSpec,ySpec,printDC)
+ 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()
+ dcs.BeginDrawing()
+ self._pointLabelFunc(dcs,mDataDict) #custom user pointLabel function
+ dcs.EndDrawing()
+
+ dc = wx.ClientDC( self )
+ #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
if isinstance(o,PolyMarker):
# draw marker with legend
pnt= (trhc[0]+legendLHS+legendSymExt[0]/2., trhc[1]+s+lineHeight/2.)
- o.draw(dc, self.printerScale, coord= Numeric.array([pnt]))
+ o.draw(dc, self.printerScale, coord= _Numeric.array([pnt]))
elif isinstance(o,PolyLine):
# 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, self.printerScale, coord= Numeric.array([pnt1,pnt2]))
+ o.draw(dc, self.printerScale, coord= _Numeric.array([pnt1,pnt2]))
else:
raise TypeError, "object is neither PolyMarker or PolyLine instance"
# draw legend txt
txtList= graphics.getLegendNames()
txtExt= dc.GetTextExtent(txtList[0])
for txt in graphics.getLegendNames()[1:]:
- txtExt= Numeric.maximum(txtExt,dc.GetTextExtent(txt))
+ 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
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)
+ 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
+ pul= _Numeric.minimum(pt1,pt2) # Upper left corner
+ plr= _Numeric.maximum(pt1,pt2) # Lower right corner
rectWidth, rectHeight= plr-pul
ptx,pty= pul
- return int(ptx),int(pty),int(rectWidth),int(rectHeight) # return ints
+ return ptx, pty, rectWidth, rectHeight
def _axisInterval(self, spec, lower, upper):
"""Returns sensible axis range for given spec"""
range = upper-lower
if range == 0.:
return lower-0.5, upper+0.5
- log = Numeric.log10(range)
- power = Numeric.floor(log)
+ log = _Numeric.log10(range)
+ power = _Numeric.floor(log)
fraction = log-power
if fraction <= 0.05:
power = power-1
def _drawAxes(self, dc, p1, p2, scale, shift, xticks, yticks):
penWidth= self.printerScale # increases thickness for printing only
- dc.SetPen(wx.Pen(wx.NamedColour('BLACK'),int(penWidth)))
+ dc.SetPen(wx.Pen(wx.NamedColour('BLACK'), penWidth))
# set length of tick marks--long ones make grid
if self._gridEnabled:
x,y,width,height= self._point2ClientCoord(p1,p2)
- yTickLength= width/2.0 +1
- xTickLength= height/2.0 +1
+ if self._gridEnabled == 'Horizontal':
+ yTickLength= width/2.0 +1
+ xTickLength= 3 * self.printerScale
+ elif self._gridEnabled == 'Vertical':
+ yTickLength= 3 * self.printerScale
+ xTickLength= height/2.0 +1
+ else:
+ yTickLength= width/2.0 +1
+ xTickLength= height/2.0 +1
else:
yTickLength= 3 * self.printerScale # lengthens lines for printing
xTickLength= 3 * self.printerScale
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
+ a1 = scale*_Numeric.array([lower, y])+shift
+ a2 = scale*_Numeric.array([upper, y])+shift
dc.DrawLine(a1[0],a1[1],a2[0],a2[1]) # draws upper and lower axis line
for x, label in xticks:
- pt = scale*Numeric.array([x, y])+shift
+ 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 = 1
h = dc.GetCharHeight()
for x, d in [(p1[0], -yTickLength), (p2[0], yTickLength)]:
- a1 = scale*Numeric.array([x, lower])+shift
- a2 = scale*Numeric.array([x, upper])+shift
+ a1 = scale*_Numeric.array([x, lower])+shift
+ a2 = scale*_Numeric.array([x, upper])+shift
dc.DrawLine(a1[0],a1[1],a2[0],a2[1])
for y, label in yticks:
- pt = scale*Numeric.array([x, y])+shift
+ 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],
def _ticks(self, lower, upper):
ideal = (upper-lower)/7.
- log = Numeric.log10(ideal)
- power = Numeric.floor(log)
+ 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)
+ e = _Numeric.fabs(fraction-lf)
if e < error:
error = e
factor = f
digits = -int(power)
format = '%'+`digits+2`+'.'+`digits`+'f'
ticks = []
- t = -grid*Numeric.floor(-lower/grid)
+ 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.))]
+ _multiples = [(2., _Numeric.log10(2.)), (5., _Numeric.log10(5.))]
#-------------------------------------------------------------------------------
return (1, 1, 1, 1) # disable page numbers
def OnPrintPage(self, page):
- dc = FloatDCWrapper(self.GetDC()) # allows using floats for certain functions
+ dc = self.GetDC() # allows using floats for certain functions
## print "PPI Printer",self.GetPPIPrinter()
## print "PPI Screen", self.GetPPIScreen()
## print "DC GetSize", dc.GetSize()
# rescale back to original
self.graph._setSize()
self.graph._setPrinterScale(1)
+ self.graph.Redraw() #to get point label scale and shift correct
return True
-# Hack to allow plotting real numbers for the methods listed.
-# All others passed directly to DC.
-# For Drawing it is used as
-# dc = FloatDCWrapper(wx.BufferedDC(wx.ClientDC(self), self._Buffer))
-# For printing is is used as
-# dc = FloatDCWrapper(self.GetDC())
-class FloatDCWrapper:
- def __init__(self, aDC):
- self.theDC = aDC
-
- def DrawLine(self, x1,y1,x2,y2):
- self.theDC.DrawLine(int(x1),int(y1), int(x2),int(y2))
-
- def DrawText(self, txt, x, y):
- self.theDC.DrawText(txt, int(x), int(y))
-
- def DrawRotatedText(self, txt, x, y, angle):
- self.theDC.DrawRotatedText(txt, int(x), int(y), angle)
-
- def SetClippingRegion(self, x, y, width, height):
- self.theDC.SetClippingRegion(int(x), int(y), int(width), int(height))
-
- def SetDeviceOrigin(self, x, y):
- self.theDC.SetDeviceOrigin(int(x), int(y))
-
- def __getattr__(self, name):
- return getattr(self.theDC, name)
-
def _draw1Objects():
# 100 points sin function, plotted as green circles
- data1 = 2.*Numeric.pi*Numeric.arange(200)/200.
+ data1 = 2.*_Numeric.pi*_Numeric.arange(200)/200.
data1.shape = (100, 2)
- data1[:,1] = Numeric.sin(data1[:,0])
+ data1[:,1] = _Numeric.sin(data1[:,0])
markers1 = PolyMarker(data1, legend='Green Markers', colour='green', marker='circle',size=1)
# 50 points cos function, plotted as red line
- data1 = 2.*Numeric.pi*Numeric.arange(100)/100.
+ data1 = 2.*_Numeric.pi*_Numeric.arange(100)/100.
data1.shape = (50,2)
- data1[:,1] = Numeric.cos(data1[:,0])
+ data1[:,1] = _Numeric.cos(data1[:,0])
lines = PolyLine(data1, legend= 'Red Line', colour='red')
# A few more points...
- pi = Numeric.pi
+ pi = _Numeric.pi
markers2 = PolyMarker([(0., 0.), (pi/4., 1.), (pi/2, 0.),
(3.*pi/4., -1)], legend='Cross Legend', colour='blue',
marker='cross')
def _draw2Objects():
# 100 points sin function, plotted as green dots
- data1 = 2.*Numeric.pi*Numeric.arange(200)/200.
+ data1 = 2.*_Numeric.pi*_Numeric.arange(200)/200.
data1.shape = (100, 2)
- data1[:,1] = Numeric.sin(data1[:,0])
+ data1[:,1] = _Numeric.sin(data1[:,0])
line1 = PolyLine(data1, legend='Green Line', colour='green', width=6, style=wx.DOT)
# 50 points cos function, plotted as red dot-dash
- data1 = 2.*Numeric.pi*Numeric.arange(100)/100.
+ data1 = 2.*_Numeric.pi*_Numeric.arange(100)/100.
data1.shape = (50,2)
- data1[:,1] = Numeric.cos(data1[:,0])
+ data1[:,1] = _Numeric.cos(data1[:,0])
line2 = PolyLine(data1, legend='Red Line', colour='red', width=3, style= wx.DOT_DASH)
# A few more points...
- pi = Numeric.pi
+ pi = _Numeric.pi
markers1 = PolyMarker([(0., 0.), (pi/4., 1.), (pi/2, 0.),
(3.*pi/4., -1)], legend='Cross Hatch Square', colour='blue', width= 3, size= 6,
fillcolour= 'red', fillstyle= wx.CROSSDIAG_HATCH,
def _draw4Objects():
# 25,000 point line
- data1 = Numeric.arange(5e5,1e6,10)
+ data1 = _Numeric.arange(5e5,1e6,10)
data1.shape = (25000, 2)
line1 = PolyLine(data1, legend='Wide Line', colour='green', width=5)
line1 = PolyLine(points, legend='Wide Line', colour='green', width=5)
return PlotGraphics([line1], "Empty Plot With Just Axes", "Value X", "Value Y")
+def _draw6Objects():
+ # Bar graph
+ points1=[(1,0), (1,10)]
+ line1 = PolyLine(points1, colour='green', legend='Feb.', width=10)
+ points1g=[(2,0), (2,4)]
+ line1g = PolyLine(points1g, colour='red', legend='Mar.', width=10)
+ points1b=[(3,0), (3,6)]
+ line1b = PolyLine(points1b, colour='blue', legend='Apr.', width=10)
+
+ points2=[(4,0), (4,12)]
+ line2 = PolyLine(points2, colour='Yellow', legend='May', width=10)
+ points2g=[(5,0), (5,8)]
+ line2g = PolyLine(points2g, colour='orange', legend='June', width=10)
+ points2b=[(6,0), (6,4)]
+ line2b = PolyLine(points2b, colour='brown', legend='July', width=10)
+
+ return PlotGraphics([line1, line1g, line1b, line2, line2g, line2b],
+ "Bar Graph - (Turn on Grid, Legend)", "Months", "Number of Students")
+
class TestFrame(wx.Frame):
def __init__(self, parent, id, title):
self.Bind(wx.EVT_MENU,self.OnPlotDraw4, id=209)
menu.Append(210, 'Draw5', 'Draw plots5')
self.Bind(wx.EVT_MENU,self.OnPlotDraw5, id=210)
+ menu.Append(260, 'Draw6', 'Draw plots6')
+ self.Bind(wx.EVT_MENU,self.OnPlotDraw6, id=260)
+
menu.Append(211, '&Redraw', 'Redraw plots')
self.Bind(wx.EVT_MENU,self.OnPlotRedraw, id=211)
menu.Append(215, 'Enable &Grid', 'Turn on Grid', kind=wx.ITEM_CHECK)
self.Bind(wx.EVT_MENU,self.OnEnableGrid, id=215)
menu.Append(220, 'Enable &Legend', 'Turn on Legend', kind=wx.ITEM_CHECK)
- self.Bind(wx.EVT_MENU,self.OnEnableLegend, id=220)
+ self.Bind(wx.EVT_MENU,self.OnEnableLegend, id=220)
+ menu.Append(222, 'Enable &Point Label', 'Show Closest Point', kind=wx.ITEM_CHECK)
+ self.Bind(wx.EVT_MENU,self.OnEnablePointLabel, id=222)
+
menu.Append(225, 'Scroll Up 1', 'Move View Up 1 Unit')
self.Bind(wx.EVT_MENU,self.OnScrUp, id=225)
menu.Append(230, 'Scroll Rt 2', 'Move View Right 2 Units')
self.CreateStatusBar(1)
self.client = PlotCanvas(self)
+ #define the function for drawing pointLabels
+ self.client.SetPointLabelFunc(self.DrawPointLabel)
# Create mouse event for showing cursor coords in status bar
self.client.Bind(wx.EVT_LEFT_DOWN, self.OnMouseLeftDown)
+ # Show closest point when enabled
+ self.client.Bind(wx.EVT_MOTION, self.OnMotion)
+
self.Show(True)
+ def DrawPointLabel(self, dc, mDataDict):
+ """This is the fuction that defines how the pointLabels are plotted
+ dc - DC that will be passed
+ mDataDict - Dictionary of data that you want to use for the pointLabel
+
+ As an example I have decided I want a box at the curve point
+ with some text information about the curve plotted below.
+ Any wxDC method can be used.
+ """
+ # ----------
+ dc.SetPen(wx.Pen(wx.BLACK))
+ dc.SetBrush(wx.Brush( wx.BLACK, wx.SOLID ) )
+
+ sx, sy = mDataDict["scaledXY"] #scaled x,y of closest point
+ dc.DrawRectangle( sx-5,sy-5, 10, 10) #10by10 square centered on point
+ px,py = mDataDict["pointXY"]
+ cNum = mDataDict["curveNum"]
+ pntIn = mDataDict["pIndex"]
+ legend = mDataDict["legend"]
+ #make a string to display
+ s = "Crv# %i, '%s', Pt. (%.2f,%.2f), PtInd %i" %(cNum, legend, px, py, pntIn)
+ dc.DrawText(s, sx , sy+1)
+ # -----------
+
def OnMouseLeftDown(self,event):
s= "Left Mouse Down at Point: (%.4f, %.4f)" % self.client.GetXY(event)
self.SetStatusText(s)
- event.Skip()
+ event.Skip() #allows plotCanvas OnMouseLeftDown to be called
+
+ def OnMotion(self, event):
+ #show closest point (when enbled)
+ if self.client.GetEnablePointLabel() == True:
+ #make up dict with info for the pointLabel
+ #I've decided to mark the closest point on the closest curve
+ dlst= self.client.GetClosetPoint( self.client.GetXY(event), pointScaled= True)
+ if dlst != []: #returns [] if none
+ curveNum, legend, pIndex, pointXY, scaledXY, distance = dlst
+ #make up dictionary to pass to my user function (see DrawPointLabel)
+ mDataDict= {"curveNum":curveNum, "legend":legend, "pIndex":pIndex,\
+ "pointXY":pointXY, "scaledXY":scaledXY}
+ #pass dict to update the pointLabel
+ self.client.UpdatePointLabel(mDataDict)
+ event.Skip() #go to next handler
def OnFilePageSetup(self, event):
self.client.PageSetup()
self.resetDefaults()
drawObj= _draw4Objects()
self.client.Draw(drawObj)
-## # profile
-## start = time.clock()
-## for x in range(10):
-## self.client.Draw(drawObj)
-## print "10 plots of Draw4 took: %f sec."%(time.clock() - start)
-## # profile end
+## # profile
+## start = _time.clock()
+## for x in range(10):
+## self.client.Draw(drawObj)
+## print "10 plots of Draw4 took: %f sec."%(_time.clock() - start)
+## # profile end
def OnPlotDraw5(self, event):
# Empty plot with just axes
# (default with None is X= (-1,1), Y= (-1,1))
self.client.Draw(drawObj, xAxis= (0,5), yAxis= (0,10))
+ def OnPlotDraw6(self, event):
+ #Bar Graph Example
+ self.resetDefaults()
+ #self.client.SetEnableLegend(True) #turn on Legend
+ #self.client.SetEnableGrid(True) #turn on Grid
+ self.client.SetXSpec('none') #turns off x-axis scale
+ self.client.SetYSpec('auto')
+ self.client.Draw(_draw6Objects(), xAxis= (0,7))
+
def OnPlotRedraw(self,event):
self.client.Redraw()
def OnEnableLegend(self, event):
self.client.SetEnableLegend(event.IsChecked())
+ def OnEnablePointLabel(self, event):
+ self.client.SetEnablePointLabel(event.IsChecked())
+
def OnScrUp(self, event):
self.client.ScrollUp(1)
projects / wxWidgets.git / blobdiff