1

#!/usr/bin/env python

     2

# -*- coding: utf-8 -*-

     3

     4

#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor

     5

#based on the plcopen standard. 

     6

#

     7

#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

     8

#

     9

#See COPYING file for copyrights details.

    10

#

    11

#This library is free software; you can redistribute it and/or

    12

#modify it under the terms of the GNU General Public

    13

#License as published by the Free Software Foundation; either

    14

#version 2.1 of the License, or (at your option) any later version.

    15

#

    16

#This library is distributed in the hope that it will be useful,

    17

#but WITHOUT ANY WARRANTY; without even the implied warranty of

    18

#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    19

#General Public License for more details.

    20

#

    21

#You should have received a copy of the GNU General Public

    22

#License along with this library; if not, write to the Free Software

    23

#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    24

    25

import wx

    26

import wx.lib.plot as plot

    27

import numpy

    28

import math

    29

from graphics.GraphicCommons import DebugViewer, MODE_SELECTION, MODE_MOTION

    30

from controls import EditorPanel

    31

    32

colours = ['blue', 'red', 'green', 'yellow', 'orange', 'purple', 'brown', 'cyan',

    33

           'pink', 'grey']

    34

markers = ['circle', 'dot', 'square', 'triangle', 'triangle_down', 'cross', 'plus', 'circle']

    35

    36

    37

#-------------------------------------------------------------------------------

    38

#                       Debug Variable Graphic Viewer class

    39

#-------------------------------------------------------------------------------

    40

    41

SECOND = 1000000000

    42

MINUTE = 60 * SECOND

    43

HOUR = 60 * MINUTE

    44

    45

ZOOM_VALUES = map(lambda x:("x %.1f" % x, x), [math.sqrt(2) ** i for i in xrange(8)])

    46

RANGE_VALUES = map(lambda x: (str(x), x), [25 * 2 ** i for i in xrange(6)])

    47

TIME_RANGE_VALUES = [("%ds" % i, i * SECOND) for i in (1, 2, 5, 10, 20, 30)] + \

    48

                    [("%dm" % i, i * MINUTE) for i in (1, 2, 5, 10, 20, 30)] + \

    49

                    [("%dh" % i, i * HOUR) for i in (1, 2, 3, 6, 12, 24)]

    50

    51

[ID_GRAPHICVIEWER, ID_GRAPHICVIEWERCANVAS, 

    52

 ID_GRAPHICVIEWERCANVASRANGE, ID_GRAPHICVIEWERCANVASZOOM, 

    53

 ID_GRAPHICVIEWERCANVASPOSITION, ID_GRAPHICVIEWERRESETBUTTON, 

    54

 ID_GRAPHICVIEWERCURRENTBUTTON, ID_GRAPHICVIEWERSTATICTEXT1, 

    55

 ID_GRAPHICVIEWERSTATICTEXT2, ID_GRAPHICVIEWERSTATICTEXT3, 

    56

] = [wx.NewId() for _init_ctrls in range(10)]

    57

    58

class GraphicViewer(EditorPanel, DebugViewer):

    59

    60

    def _init_coll_MainGridSizer_Items(self, parent):

    61

        # generated method, don't edit

    62

        parent.AddWindow(self.Canvas, 0, border=0, flag=wx.GROW)

    63

        parent.AddSizer(self.RangeSizer, 0, border=0, flag=wx.GROW)

    64

    65

    def _init_coll_MainGridSizer_Growables(self, parent):

    66

        # generated method, don't edit

    67

        parent.AddGrowableCol(0)

    68

        parent.AddGrowableRow(0)

    69

    70

    def _init_coll_RangeSizer_Items(self, parent):

    71

        # generated method, don't edit

    72

        parent.AddWindow(self.staticbox1, 0, border=5, flag=wx.ALIGN_CENTER_VERTICAL|wx.ALL)

    73

        parent.AddWindow(self.CanvasRange, 0, border=5, flag=wx.ALL)

    74

        parent.AddWindow(self.staticbox3, 0, border=5, flag=wx.ALIGN_CENTER_VERTICAL|wx.ALL)

    75

        parent.AddWindow(self.CanvasZoom, 0, border=5, flag=wx.ALL)

    76

        parent.AddWindow(self.staticText2, 0, border=5, flag=wx.ALIGN_CENTER_VERTICAL|wx.ALL)

    77

        parent.AddWindow(self.CanvasPosition, 0, border=5, flag=wx.GROW|wx.ALL)

    78

        parent.AddWindow(self.ResetButton, 0, border=5, flag=wx.ALL)

    79

        parent.AddWindow(self.CurrentButton, 0, border=5, flag=wx.ALL)

    80

    81

    def _init_coll_RangeSizer_Growables(self, parent):

    82

        # generated method, don't edit

    83

        parent.AddGrowableCol(5)

    84

        parent.AddGrowableRow(0)

    85

    86

    def _init_sizers(self):

    87

        # generated method, don't edit

    88

        self.MainGridSizer = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=0)

    89

        self.RangeSizer = wx.FlexGridSizer(cols=8, hgap=0, rows=1, vgap=0)

    90

    91

        self._init_coll_MainGridSizer_Items(self.MainGridSizer)

    92

        self._init_coll_MainGridSizer_Growables(self.MainGridSizer)

    93

        self._init_coll_RangeSizer_Items(self.RangeSizer)

    94

        self._init_coll_RangeSizer_Growables(self.RangeSizer)

    95

    96

        self.Editor.SetSizer(self.MainGridSizer)

    97

    98

    def _init_Editor(self, prnt):

    99

        self.Editor = wx.Panel(prnt, ID_GRAPHICVIEWER, wx.DefaultPosition, 

   100

                 wx.DefaultSize, 0)

   101

   102

        self.Canvas = plot.PlotCanvas(id=ID_GRAPHICVIEWERCANVAS, 

   103

              name='Canvas', parent=self.Editor, pos=wx.Point(0, 0),

   104

              size=wx.Size(0, 0), style=0)

   105

        def _axisInterval(spec, lower, upper):

   106

            if spec == 'border':

   107

                if lower == upper:

   108

                    return lower - 0.5, upper + 0.5

   109

                else:

   110

                    border = (upper - lower) * 0.05

   111

                    return lower - border, upper + border

   112

            else:

   113

                return plot.PlotCanvas._axisInterval(self.Canvas, spec, lower, upper)

   114

        self.Canvas._axisInterval = _axisInterval

   115

        self.Canvas.SetYSpec('border')

   116

        self.Canvas.canvas.Bind(wx.EVT_LEFT_DOWN, self.OnCanvasLeftDown)

   117

        self.Canvas.canvas.Bind(wx.EVT_LEFT_UP, self.OnCanvasLeftUp)

   118

        self.Canvas.canvas.Bind(wx.EVT_MOTION, self.OnCanvasMotion)

   119

        self.Canvas.canvas.Bind(wx.EVT_MOUSEWHEEL, self.OnCanvasMouseWheel)

   121

   122

        self.staticbox1 = wx.StaticText(id=ID_GRAPHICVIEWERSTATICTEXT1,

   123

              label=_('Range:'), name='staticText1', parent=self.Editor,

   124

              pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)

   125

   126

        self.CanvasRange = wx.ComboBox(id=ID_GRAPHICVIEWERCANVASRANGE,

   127

              name='CanvasRange', parent=self.Editor, pos=wx.Point(0, 0),

   128

              size=wx.Size(100, 28), style=wx.CB_READONLY)

   129

        self.Bind(wx.EVT_COMBOBOX, self.OnRangeChanged, id=ID_GRAPHICVIEWERCANVASRANGE)

   130

   131

        self.staticbox3 = wx.StaticText(id=ID_GRAPHICVIEWERSTATICTEXT3,

   132

              label=_('Zoom:'), name='staticText3', parent=self.Editor,

   133

              pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)

   134

   135

        self.CanvasZoom = wx.ComboBox(id=ID_GRAPHICVIEWERCANVASZOOM,

   136

              name='CanvasZoom', parent=self.Editor, pos=wx.Point(0, 0),

   137

              size=wx.Size(70, 28), style=wx.CB_READONLY)

   138

        self.Bind(wx.EVT_COMBOBOX, self.OnZoomChanged, id=ID_GRAPHICVIEWERCANVASZOOM)

   139

   140

        self.staticText2 = wx.StaticText(id=ID_GRAPHICVIEWERSTATICTEXT2,

   141

              label=_('Position:'), name='staticText2', parent=self.Editor,

   142

              pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)

   143

   144

        self.CanvasPosition = wx.ScrollBar(id=ID_GRAPHICVIEWERCANVASPOSITION,

   145

              name='Position', parent=self.Editor, pos=wx.Point(0, 0),

   146

              size=wx.Size(0, 16), style=wx.SB_HORIZONTAL)

   147

        self.CanvasPosition.SetScrollbar(0, 10, 100, 10)

   148

        self.CanvasPosition.Bind(wx.EVT_SCROLL_THUMBTRACK, self.OnPositionChanging, 

   149

              id = ID_GRAPHICVIEWERCANVASPOSITION)

   150

        self.CanvasPosition.Bind(wx.EVT_SCROLL_LINEUP, self.OnPositionChanging, 

   151

              id = ID_GRAPHICVIEWERCANVASPOSITION)

   152

        self.CanvasPosition.Bind(wx.EVT_SCROLL_LINEDOWN, self.OnPositionChanging, 

   153

              id = ID_GRAPHICVIEWERCANVASPOSITION)

   154

        self.CanvasPosition.Bind(wx.EVT_SCROLL_PAGEUP, self.OnPositionChanging, 

   155

              id = ID_GRAPHICVIEWERCANVASPOSITION)

   156

        self.CanvasPosition.Bind(wx.EVT_SCROLL_PAGEDOWN, self.OnPositionChanging, 

   157

              id = ID_GRAPHICVIEWERCANVASPOSITION)

   158

   159

        self.ResetButton = wx.Button(id=ID_GRAPHICVIEWERRESETBUTTON, label='Reset',

   160

              name='ResetButton', parent=self.Editor, pos=wx.Point(0, 0),

   161

              size=wx.Size(72, 24), style=0)

   162

        self.Bind(wx.EVT_BUTTON, self.OnResetButton, id=ID_GRAPHICVIEWERRESETBUTTON)

   163

   164

        self.CurrentButton = wx.Button(id=ID_GRAPHICVIEWERCURRENTBUTTON, label='Current',

   165

              name='CurrentButton', parent=self.Editor, pos=wx.Point(0, 0),

   166

              size=wx.Size(72, 24), style=0)

   167

        self.Bind(wx.EVT_BUTTON, self.OnCurrentButton, id=ID_GRAPHICVIEWERCURRENTBUTTON)

   168

   169

        self._init_sizers()

   170

   171

    def __init__(self, parent, window, producer, instancepath = ""):

   172

        EditorPanel.__init__(self, parent, "", window, None)

   173

        DebugViewer.__init__(self, producer, True, False)

   174

   175

        self.InstancePath = instancepath

   176

        self.RangeValues = None

   177

        self.CursorIdx = None

   178

        self.LastCursor = None

   179

        self.CurrentMousePos = None

   180

        self.CurrentMotionValue = None

   181

        self.Dragging = False

   182

   183

        # Initialize Viewer mode to Selection mode

   184

        self.Mode = MODE_SELECTION

   185

   186

        self.Datas = []

   187

        self.StartTick = 0

   188

        self.StartIdx = 0

   189

        self.EndIdx = 0

   190

        self.MinValue = None

   191

        self.MaxValue = None

   192

        self.YCenter = 0

   193

        self.CurrentZoom = 1

   194

        self.Fixed = False

   196

        self.RefreshCanvasRange()

   197

   198

        for zoom_txt, zoom in ZOOM_VALUES:

   199

            self.CanvasZoom.Append(zoom_txt)

   200

        self.CanvasZoom.SetSelection(0)

   201

   202

        self.AddDataConsumer(self.InstancePath.upper(), self)

   203

   204

    def __del__(self):

   205

        DebugViewer.__del__(self)

   206

        self.RemoveDataConsumer(self)

   207

   208

    def GetTitle(self):

   209

        if len(self.InstancePath) > 15:

   210

            return "..." + self.InstancePath[-12:]

   211

        return self.InstancePath

   212

   213

    # Changes Viewer mode

   214

    def SetMode(self, mode):

   215

        if self.Mode != mode or mode == MODE_SELECTION:    

   216

            if self.Mode == MODE_MOTION:

   217

                wx.CallAfter(self.Canvas.canvas.SetCursor, wx.NullCursor)

   218

            self.Mode = mode

   219

        if self.Mode == MODE_MOTION:

   220

            wx.CallAfter(self.Canvas.canvas.SetCursor, wx.StockCursor(wx.CURSOR_HAND))

   221

   222

    def ResetView(self, register=False):

   223

        self.Datas = []

   224

        self.StartTick = 0

   225

        self.StartIdx = 0

   226

        self.EndIdx = 0

   227

        self.CursorIdx = None

   228

        self.Fixed = False

   229

        self.Ticktime = self.DataProducer.GetTicktime()

   230

        if register:

   231

            self.AddDataConsumer(self.InstancePath.upper(), self)

   232

        self.ResetLastCursor()

   233

        self.RefreshCanvasRange()

   234

        self.RefreshView()

   235

   236

    def RefreshNewData(self, *args, **kwargs):

   237

        self.RefreshView(*args, **kwargs)

   238

        DebugViewer.RefreshNewData(self)

   239

   240

    def GetNearestData(self, tick, adjust):

   241

        ticks = numpy.array(zip(*self.Datas)[0])

   242

        new_cursor = numpy.argmin(abs(ticks - tick))

   243

        if adjust == -1 and ticks[new_cursor] > tick and new_cursor > 0:

   244

            new_cursor -= 1

   245

        elif adjust == 1 and ticks[new_cursor] < tick and new_cursor < len(self.Datas):

   246

            new_cursor += 1

   247

        return new_cursor

   248

   249

    def GetBounds(self):

   250

        if self.StartIdx is None or self.EndIdx is None:

   251

            self.StartIdx = self.GetNearestData(self.StartTick, -1)

   252

            self.EndIdx = self.GetNearestData(self.StartTick + self.CurrentRange, 1)

   253

   254

    def ResetBounds(self):

   255

        self.StartIdx = None

   256

        self.EndIdx = None

   257

   258

    def RefreshCanvasRange(self):

   259

        if self.Ticktime == 0 and self.RangeValues != RANGE_VALUES:

   260

            self.RangeValues = RANGE_VALUES

   261

            self.CanvasRange.Clear()

   262

            for text, value in RANGE_VALUES:

   263

                self.CanvasRange.Append(text)

   264

            self.CanvasRange.SetStringSelection(RANGE_VALUES[0][0])

   265

            self.CurrentRange = RANGE_VALUES[0][1]

   266

        elif self.RangeValues != TIME_RANGE_VALUES:

   267

            self.RangeValues = TIME_RANGE_VALUES

   268

            self.CanvasRange.Clear()

   269

            for text, value in TIME_RANGE_VALUES:

   270

                self.CanvasRange.Append(text)

   271

            self.CanvasRange.SetStringSelection(TIME_RANGE_VALUES[0][0])

   272

            self.CurrentRange = TIME_RANGE_VALUES[0][1] / self.Ticktime

   273

   274

    def RefreshView(self, force=True):

   275

        self.Freeze()

   276

        if force or not self.Fixed or (len(self.Datas) > 0 and self.StartTick + self.CurrentRange > self.Datas[-1][0]):

   277

            if (self.MinValue is not None and 

   278

                self.MaxValue is not None and 

   279

                self.MinValue != self.MaxValue):

   280

                Yrange = float(self.MaxValue - self.MinValue) / self.CurrentZoom

   281

            else:

   282

                Yrange = 2. / self.CurrentZoom

   283

   284

            if not self.Fixed and len(self.Datas) > 0:

   285

                self.YCenter = max(self.Datas[-1][1] - Yrange / 2, 

   286

                               min(self.YCenter, 

   287

                                   self.Datas[-1][1] + Yrange / 2))

   288

   289

            var_name = self.InstancePath.split(".")[-1]

   290

   291

            self.GetBounds()

   292

            self.VariableGraphic = plot.PolyLine(self.Datas[self.StartIdx:self.EndIdx + 1], 

   293

                                                 legend=var_name, colour=colours[0])

   294

            self.GraphicsObject = plot.PlotGraphics([self.VariableGraphic], _("%s Graphics") % var_name, _("Tick"), _("Values"))

   295

            self.Canvas.Draw(self.GraphicsObject, 

   296

                             xAxis=(self.StartTick, self.StartTick + self.CurrentRange),

   297

                             yAxis=(self.YCenter - Yrange * 1.1 / 2, self.YCenter + Yrange * 1.1 / 2))

   298

   299

            # Reset and draw cursor 

   300

            self.ResetLastCursor()

   301

            self.RefreshCursor()

   302

   303

        self.RefreshScrollBar()

   304

   305

        self.Thaw()

   306

   307

    def GetInstancePath(self):

   308

        return self.InstancePath

   309

   310

    def IsViewing(self, tagname):

   311

        return self.InstancePath == tagname

   312

   313

    def NewValue(self, tick, value, forced=False):

   314

        self.Datas.append((float(tick), {True:1., False:0.}.get(value, float(value))))

   315

        if self.MinValue is None:

   316

            self.MinValue = value

   317

        else:

   318

            self.MinValue = min(self.MinValue, value)

   319

        if self.MaxValue is None:

   320

            self.MaxValue = value

   321

        else:

   322

            self.MaxValue = max(self.MaxValue, value)

   323

        if not self.Fixed or tick < self.StartTick + self.CurrentRange:

   324

            self.GetBounds()

   325

            while int(self.Datas[self.StartIdx][0]) < tick - self.CurrentRange:

   326

                self.StartIdx += 1

   327

            self.EndIdx += 1

   328

            self.StartTick = self.Datas[self.StartIdx][0]

   329

        self.NewDataAvailable()

   330

   331

    def RefreshScrollBar(self):

   332

        if len(self.Datas) > 0:

   333

            self.GetBounds()

   334

            pos = int(self.Datas[self.StartIdx][0] - self.Datas[0][0])

   335

            range = int(self.Datas[-1][0] - self.Datas[0][0])

   336

        else:

   337

            pos = 0

   338

            range = 0

   339

        self.CanvasPosition.SetScrollbar(pos, self.CurrentRange, range, self.CurrentRange)

   340

   341

    def RefreshRange(self):

   342

        if len(self.Datas) > 0:

   343

            if self.Fixed and self.Datas[-1][0] - self.Datas[0][0] < self.CurrentRange:

   344

                self.Fixed = False

   345

            self.ResetBounds()

   346

            if self.Fixed:

   347

                self.StartTick = min(self.StartTick, self.Datas[-1][0] - self.CurrentRange)

   348

            else:

   349

                self.StartTick = max(self.Datas[0][0], self.Datas[-1][0] - self.CurrentRange)

   350

        self.NewDataAvailable(True)

   351

   352

    def OnRangeChanged(self, event):

   353

        try:

   354

            if self.Ticktime == 0:

   355

                self.CurrentRange = self.RangeValues[self.CanvasRange.GetSelection()][1]

   356

            else:

   357

                self.CurrentRange = self.RangeValues[self.CanvasRange.GetSelection()][1] / self.Ticktime

   358

        except ValueError, e:

   359

            self.CanvasRange.SetValue(str(self.CurrentRange))

   360

        wx.CallAfter(self.RefreshRange)

   361

        event.Skip()

   362

   363

    def OnZoomChanged(self, event):

   364

        self.CurrentZoom = ZOOM_VALUES[self.CanvasZoom.GetSelection()][1]

   365

        wx.CallAfter(self.NewDataAvailable, True)

   366

        event.Skip()

   367

   368

    def OnPositionChanging(self, event):

   369

        self.ResetBounds()

   370

        self.StartTick = self.Datas[0][0] + event.GetPosition()

   371

        self.Fixed = True

   372

        self.NewDataAvailable(True)

   373

        event.Skip()

   374

   375

    def OnResetButton(self, event):

   376

        self.Fixed = False

   377

        self.ResetView()

   378

        event.Skip()

   379

   380

    def OnCurrentButton(self, event):

   381

        self.ResetBounds()

   382

        self.StartTick = max(self.Datas[0][0], self.Datas[-1][0] - self.CurrentRange)

   383

        self.Fixed = False

   384

        self.NewDataAvailable(True)

   385

        event.Skip()

   386

   387

    def OnCanvasLeftDown(self, event):

   388

        self.Fixed = True

   389

        self.Canvas.canvas.CaptureMouse()

   390

        if len(self.Datas) > 0:

   391

            if self.Mode == MODE_SELECTION:

   392

                self.Dragging = True

   393

                pos = self.Canvas.PositionScreenToUser(event.GetPosition())

   394

                self.CursorIdx = self.GetNearestData(pos[0], -1)

   395

                self.RefreshCursor()

   396

            elif self.Mode == MODE_MOTION:

   397

                self.GetBounds()

   398

                self.CurrentMousePos = event.GetPosition()

   399

                self.CurrentMotionValue = self.Datas[self.StartIdx][0]

   400

        event.Skip()

   401

   402

    def OnCanvasLeftUp(self, event):

   403

        self.Dragging = False

   404

        if self.Mode == MODE_MOTION:

   405

            self.CurrentMousePos = None

   406

            self.CurrentMotionValue = None

   407

        if self.Canvas.canvas.HasCapture():

   408

            self.Canvas.canvas.ReleaseMouse()

   409

        event.Skip()

   410

   411

    def OnCanvasMotion(self, event):

   412

        if self.Mode == MODE_SELECTION and self.Dragging:

   413

            pos = self.Canvas.PositionScreenToUser(event.GetPosition())

   414

            graphics, xAxis, yAxis = self.Canvas.last_draw

   415

            self.CursorIdx = self.GetNearestData(max(xAxis[0], min(pos[0], xAxis[1])), -1)

   416

            self.RefreshCursor()

   417

        elif self.CurrentMousePos is not None and len(self.Datas) > 0:

   418

            oldpos = self.Canvas.PositionScreenToUser(self.CurrentMousePos)

   419

            newpos = self.Canvas.PositionScreenToUser(event.GetPosition())

   420

            self.CurrentMotionValue += oldpos[0] - newpos[0]

   421

            self.YCenter += oldpos[1] - newpos[1]

   422

            self.ResetBounds()

   423

            self.StartTick = max(self.Datas[0][0], min(self.CurrentMotionValue, self.Datas[-1][0] - self.CurrentRange))

   424

            self.CurrentMousePos = event.GetPosition()

   425

            self.NewDataAvailable(True)

   426

        event.Skip()

   427

   428

    def OnCanvasMouseWheel(self, event):

   429

        if self.CurrentMousePos is None:

   430

            rotation = event.GetWheelRotation() / event.GetWheelDelta()

   431

            if event.ShiftDown():

   432

                current = self.CanvasRange.GetSelection()

   433

                new = max(0, min(current - rotation, len(self.RangeValues) - 1))

   434

                if new != current:

   435

                    if self.Ticktime == 0:

   436

                        self.CurrentRange = self.RangeValues[new][1]

   437

                    else:

   438

                        self.CurrentRange = self.RangeValues[new][1] / self.Ticktime

   439

                    self.CanvasRange.SetStringSelection(self.RangeValues[new][0])

   440

                    wx.CallAfter(self.RefreshRange)

   441

            else:

   442

                current = self.CanvasZoom.GetSelection()

   443

                new = max(0, min(current - rotation, len(ZOOM_VALUES) - 1))

   444

                if new != current:

   445

                    self.CurrentZoom = ZOOM_VALUES[new][1]

   446

                    self.CanvasZoom.SetStringSelection(ZOOM_VALUES[new][0])

   447

                    wx.CallAfter(self.NewDataAvailable, True)

   448

        event.Skip()

   449

   455

    ## Reset the last cursor

   456

    def ResetLastCursor(self):

   457

        self.LastCursor = None

   458

   459

    ## Draw the cursor on graphic

   460

    #  @param dc The draw canvas

   461

    #  @param cursor The cursor parameters

   462

    def DrawCursor(self, dc, cursor, value):

   463

        if self.StartTick <= cursor <= self.StartTick + self.CurrentRange:

   464

            # Prepare temporary dc for drawing

   465

            width = self.Canvas._Buffer.GetWidth()

   466

            height = self.Canvas._Buffer.GetHeight()

   467

            tmp_Buffer = wx.EmptyBitmap(width, height)

   468

            dcs = wx.MemoryDC()

   469

            dcs.SelectObject(tmp_Buffer)

   470

            dcs.Clear()

   471

            dcs.BeginDrawing()

   472

   473

            dcs.SetPen(wx.Pen(wx.RED))

   474

            dcs.SetBrush(wx.Brush(wx.RED, wx.SOLID))

   475

            dcs.SetFont(self.Canvas._getFont(self.Canvas._fontSizeAxis))

   476

   477

            # Calculate clipping region

   478

            graphics, xAxis, yAxis = self.Canvas.last_draw

   479

            p1 = numpy.array([xAxis[0], yAxis[0]])

   480

            p2 = numpy.array([xAxis[1], yAxis[1]])

   481

            cx, cy, cwidth, cheight = self.Canvas._point2ClientCoord(p1, p2)

   482

   483

            px, py = self.Canvas.PositionUserToScreen((float(cursor), 0.))

   484

   485

            # Draw line cross drawing for diaplaying time cursor

   486

            dcs.DrawLine(px, cy + 1, px, cy + cheight - 1)

   487

   488

            lines = ("X:%d\nY:%f" % (cursor, value)).splitlines()

   489

   490

            wtext = 0

   491

            for line in lines:

   492

                w, h = dcs.GetTextExtent(line)

   493

                wtext = max(wtext, w)

   494

   495

            offset = 0

   496

            for line in lines: