wxPython/demo/PrintFramework.py

   1
   2 from wxPython.wx         import *
   3 from wxScrolledWindow    import MyCanvas
   4
   5 #----------------------------------------------------------------------
   6
   7 class MyPrintout(wxPrintout):
   8     def __init__(self, canvas, log):
   9         wxPrintout.__init__(self)
  10         self.canvas = canvas
  11         self.log = log
  12
  13     def OnBeginDocument(self, start, end):
  14         self.log.WriteText("wxPrintout.OnBeginDocument\n")
  15         return self.base_OnBeginDocument(start, end)
  16
  17     def OnEndDocument(self):
  18         self.log.WriteText("wxPrintout.OnEndDocument\n")
  19         self.base_OnEndDocument()
  20
  21     def OnBeginPrinting(self):
  22         self.log.WriteText("wxPrintout.OnBeginPrinting\n")
  23         self.base_OnBeginPrinting()
  24
  25     def OnEndPrinting(self):
  26         self.log.WriteText("wxPrintout.OnEndPrinting\n")
  27         self.base_OnEndPrinting()
  28
  29     def OnPreparePrinting(self):
  30         self.log.WriteText("wxPrintout.OnPreparePrinting\n")
  31         self.base_OnPreparePrinting()
  32
  33     def HasPage(self, page):
  34         self.log.WriteText("wxPrintout.HasPage: %d\n" % page)
  35         if page <= 2:
  36             return true
  37         else:
  38             return false
  39
  40     def GetPageInfo(self):
  41         self.log.WriteText("wxPrintout.GetPageInfo\n")
  42         return (1, 2, 1, 2)
  43
  44     def OnPrintPage(self, page):
  45         self.log.WriteText("wxPrintout.OnPrintPage: %d\n" % page)
  46         dc = self.GetDC()
  47
  48         #-------------------------------------------
  49         # One possible method of setting scaling factors...
  50
  51         maxX = self.canvas.getWidth()
  52         maxY = self.canvas.getHeight()
  53
  54         # Let's have at least 50 device units margin
  55         marginX = 50
  56         marginY = 50
  57
  58         # Add the margin to the graphic size
  59         maxX = maxX + (2 * marginX)
  60         maxY = maxY + (2 * marginY)
  61
  62         # Get the size of the DC in pixels
  63         (w, h) = dc.GetSizeTuple()
  64
  65         # Calculate a suitable scaling factor
  66         scaleX = float(w) / maxX
  67         scaleY = float(h) / maxY
  68
  69         # Use x or y scaling factor, whichever fits on the DC
  70         actualScale = min(scaleX, scaleY)
  71
  72         # Calculate the position on the DC for centring the graphic
  73         posX = (w - (self.canvas.getWidth() * actualScale)) / 2.0
  74         posY = (h - (self.canvas.getHeight() * actualScale)) / 2.0
  75
  76         # Set the scale and origin
  77         dc.SetUserScale(actualScale, actualScale)
  78         dc.SetDeviceOrigin(int(posX), int(posY))
  79
  80         #-------------------------------------------
  81
  82         self.canvas.DoDrawing(dc)
  83         dc.DrawText("Page: %d" % page, marginX/2, maxY-marginY)
  84
  85         return true
  86
  87
  88 #----------------------------------------------------------------------
  89
  90
  91 class TestPrintPanel(wxPanel):
  92     def __init__(self, parent, frame, log):
  93         wxPanel.__init__(self, parent, -1)
  94         self.log = log
  95         self.frame = frame
  96
  97
  98         self.printData = wxPrintData()
  99         self.printData.SetPaperId(wxPAPER_LETTER)
 100
 101         self.box = wxBoxSizer(wxVERTICAL)
 102         self.canvas = MyCanvas(self)
 103         self.box.Add(self.canvas, 1, wxGROW)
 104
 105         subbox = wxBoxSizer(wxHORIZONTAL)
 106         btn = wxButton(self, 1201, "Print Setup")
 107         EVT_BUTTON(self, 1201, self.OnPrintSetup)
 108         subbox.Add(btn, 1, wxGROW | wxALL, 2)
 109
 110         btn = wxButton(self, 1202, "Print Preview")
 111         EVT_BUTTON(self, 1202, self.OnPrintPreview)
 112         subbox.Add(btn, 1, wxGROW | wxALL, 2)
 113
 114         btn = wxButton(self, 1203, "Print")
 115         EVT_BUTTON(self, 1203, self.OnDoPrint)
 116         subbox.Add(btn, 1, wxGROW | wxALL, 2)
 117
 118         self.box.Add(subbox, 0, wxGROW)
 119
 120         self.SetAutoLayout(true)
 121         self.SetSizer(self.box)
 122
 123
 124     def OnPrintSetup(self, event):
 125         printerDialog = wxPrintDialog(self)
 126         printerDialog.GetPrintDialogData().SetPrintData(self.printData)
 127         printerDialog.GetPrintDialogData().SetSetupDialog(true)
 128         printerDialog.ShowModal();
 129         self.printData = printerDialog.GetPrintDialogData().GetPrintData()
 130         printerDialog.Destroy()
 131
 132
 133     def OnPrintPreview(self, event):
 134         self.log.WriteText("OnPrintPreview\n")
 135         printout = MyPrintout(self.canvas, self.log)
 136         printout2 = MyPrintout(self.canvas, self.log)
 137         self.preview = wxPrintPreview(printout, printout2, self.printData)
 138         if not self.preview.Ok():
 139             self.log.WriteText("Houston, we have a problem...\n")
 140             return
 141
 142         frame = wxPreviewFrame(self.preview, self.frame, "This is a print preview")
 143
 144         frame.Initialize()
 145         frame.SetPosition(self.frame.GetPosition())
 146         frame.SetSize(self.frame.GetSize())
 147         frame.Show(true)
 148
 149
 150
 151     def OnDoPrint(self, event):
 152         pdd = wxPrintDialogData()
 153         pdd.SetPrintData(self.printData)
 154         printer = wxPrinter(pdd)
 155         printout = MyPrintout(self.canvas, self.log)
 156         if not printer.Print(self.frame, printout):
 157             wxMessageBox("There was a problem printing.\nPerhaps your current printer is not set correctly?", "Printing", wxOK)
 158         else:
 159             self.printData = printer.GetPrintDialogData().GetPrintData()
 160         printout.Destroy()
 161
 162
 163 #----------------------------------------------------------------------
 164
 165 def runTest(frame, nb, log):
 166     win = TestPrintPanel(nb, frame, log)
 167     return win
 168
 169
 170 #----------------------------------------------------------------------
 171
 172
 173
 174
 175
 176 overview = """\
 177 """
 178