wxPython/demo/PrintFramework.py

   1
   2 import  wx
   3 import  ScrolledWindow
   4
   5 #----------------------------------------------------------------------
   6
   7 ID_Setup    =   wx.NewId()
   8 ID_Preview  =   wx.NewId()
   9 ID_Print    =   wx.NewId()
  10
  11 class MyPrintout(wx.Printout):
  12     def __init__(self, canvas, log):
  13         wx.Printout.__init__(self)
  14         self.canvas = canvas
  15         self.log = log
  16
  17     def OnBeginDocument(self, start, end):
  18         self.log.WriteText("wx.Printout.OnBeginDocument\n")
  19         return self.base_OnBeginDocument(start, end)
  20
  21     def OnEndDocument(self):
  22         self.log.WriteText("wx.Printout.OnEndDocument\n")
  23         self.base_OnEndDocument()
  24
  25     def OnBeginPrinting(self):
  26         self.log.WriteText("wx.Printout.OnBeginPrinting\n")
  27         self.base_OnBeginPrinting()
  28
  29     def OnEndPrinting(self):
  30         self.log.WriteText("wx.Printout.OnEndPrinting\n")
  31         self.base_OnEndPrinting()
  32
  33     def OnPreparePrinting(self):
  34         self.log.WriteText("wx.Printout.OnPreparePrinting\n")
  35         self.base_OnPreparePrinting()
  36
  37     def HasPage(self, page):
  38         self.log.WriteText("wx.Printout.HasPage: %d\n" % page)
  39         if page <= 2:
  40             return True
  41         else:
  42             return False
  43
  44     def GetPageInfo(self):
  45         self.log.WriteText("wx.Printout.GetPageInfo\n")
  46         return (1, 2, 1, 2)
  47
  48     def OnPrintPage(self, page):
  49         self.log.WriteText("wx.Printout.OnPrintPage: %d\n" % page)
  50         dc = self.GetDC()
  51
  52         #-------------------------------------------
  53         # One possible method of setting scaling factors...
  54
  55         maxX = self.canvas.getWidth()
  56         maxY = self.canvas.getHeight()
  57
  58         # Let's have at least 50 device units margin
  59         marginX = 50
  60         marginY = 50
  61
  62         # Add the margin to the graphic size
  63         maxX = maxX + (2 * marginX)
  64         maxY = maxY + (2 * marginY)
  65
  66         # Get the size of the DC in pixels
  67         (w, h) = dc.GetSizeTuple()
  68
  69         # Calculate a suitable scaling factor
  70         scaleX = float(w) / maxX
  71         scaleY = float(h) / maxY
  72
  73         # Use x or y scaling factor, whichever fits on the DC
  74         actualScale = min(scaleX, scaleY)
  75
  76         # Calculate the position on the DC for centering the graphic
  77         posX = (w - (self.canvas.getWidth() * actualScale)) / 2.0
  78         posY = (h - (self.canvas.getHeight() * actualScale)) / 2.0
  79
  80         # Set the scale and origin
  81         dc.SetUserScale(actualScale, actualScale)
  82         dc.SetDeviceOrigin(int(posX), int(posY))
  83
  84         #-------------------------------------------
  85
  86         self.canvas.DoDrawing(dc, True)
  87         dc.DrawText("Page: %d" % page, (marginX/2, maxY-marginY))
  88
  89         return True
  90
  91
  92 #----------------------------------------------------------------------
  93
  94
  95 class TestPrintPanel(wx.Panel):
  96     def __init__(self, parent, frame, log):
  97         wx.Panel.__init__(self, parent, -1)
  98         self.log = log
  99         self.frame = frame
 100
 101         self.printData = wx.PrintData()
 102         self.printData.SetPaperId(wx.PAPER_LETTER)
 103
 104         self.box = wx.BoxSizer(wx.VERTICAL)
 105         self.canvas = ScrolledWindow.MyCanvas(self)
 106         self.box.Add(self.canvas, 1, wx.GROW)
 107
 108         subbox = wx.BoxSizer(wx.HORIZONTAL)
 109         btn = wx.Button(self, ID_Setup, "Print Setup")
 110         self.Bind(wx.EVT_BUTTON, self.OnPrintSetup, id=ID_Setup)
 111         subbox.Add(btn, 1, wx.GROW | wx.ALL, 2)
 112
 113         btn = wx.Button(self, ID_Preview, "Print Preview")
 114         self.Bind(wx.EVT_BUTTON, self.OnPrintPreview, id=ID_Preview)
 115         subbox.Add(btn, 1, wx.GROW | wx.ALL, 2)
 116
 117         btn = wx.Button(self, ID_Print, "Print")
 118         self.Bind(wx.EVT_BUTTON, self.OnDoPrint, id=ID_Print)
 119         subbox.Add(btn, 1, wx.GROW | wx.ALL, 2)
 120
 121         self.box.Add(subbox, 0, wx.GROW)
 122
 123         self.SetAutoLayout(True)
 124         self.SetSizer(self.box)
 125
 126
 127     def OnPrintSetup(self, event):
 128         printerDialog = wx.PrintDialog(self)
 129         printerDialog.GetPrintDialogData().SetPrintData(self.printData)
 130         printerDialog.GetPrintDialogData().SetSetupDialog(True)
 131         printerDialog.ShowModal();
 132         self.printData = printerDialog.GetPrintDialogData().GetPrintData()
 133         printerDialog.Destroy()
 134
 135
 136     def OnPrintPreview(self, event):
 137         self.log.WriteText("OnPrintPreview\n")
 138         printout = MyPrintout(self.canvas, self.log)
 139         printout2 = MyPrintout(self.canvas, self.log)
 140         self.preview = wx.PrintPreview(printout, printout2, self.printData)
 141
 142         if not self.preview.Ok():
 143             self.log.WriteText("Houston, we have a problem...\n")
 144             return
 145
 146         frame = wx.PreviewFrame(self.preview, self.frame, "This is a print preview")
 147
 148         frame.Initialize()
 149         frame.SetPosition(self.frame.GetPosition())
 150         frame.SetSize(self.frame.GetSize())
 151         frame.Show(True)
 152
 153
 154
 155     def OnDoPrint(self, event):
 156         pdd = wx.PrintDialogData()
 157         pdd.SetPrintData(self.printData)
 158         printer = wx.Printer(pdd)
 159         printout = MyPrintout(self.canvas, self.log)
 160
 161         if not printer.Print(self.frame, printout):
 162             wx.MessageBox("There was a problem printing.\nPerhaps your current printer is not set correctly?", "Printing", wx.OK)
 163         else:
 164             self.printData = printer.GetPrintDialogData().GetPrintData()
 165         printout.Destroy()
 166
 167
 168 #----------------------------------------------------------------------
 169
 170 def runTest(frame, nb, log):
 171     win = TestPrintPanel(nb, frame, log)
 172     return win
 173
 174
 175 #----------------------------------------------------------------------
 176
 177
 178
 179
 180
 181 overview = """\
 182 <html>
 183 <body>
 184 <h1>PrintFramework</h1>
 185
 186 This is an overview of the classes and methods used to print documents.
 187 It also demonstrates how to do print previews and invoke the printer
 188 setup dialog.
 189
 190 <p>Classes demonstrated here:<P>
 191 <ul>
 192     <li><b>wx.Printout()</b> - This class encapsulates the functionality of printing out
 193         an application document. A new class must be derived and members overridden
 194         to respond to calls such as OnPrintPage and HasPage. Instances of this class
 195         are passed to wx.Printer.Print() or a wx.PrintPreview object to initiate
 196         printing or previewing.<P><p>
 197
 198     <li><b>wx.PrintData()</b> - This class holds a variety of information related to
 199         printers and printer device contexts. This class is used to create a
 200         wx.PrinterDC and a wx.PostScriptDC. It is also used as a data member of
 201         wx.PrintDialogData and wx.PageSetupDialogData, as part of the mechanism for
 202         transferring data between the print dialogs and the application.<p><p>
 203
 204     <li><b>wx.PrintDialog()</b> - This class represents the print and print setup
 205         common dialogs. You may obtain a wx.PrinterDC device context from a
 206         successfully dismissed print dialog.<p><p>
 207
 208     <li><b>wx.PrintPreview()</b> - Objects of this class manage the print preview
 209         process. The object is passed a wx.Printout object, and the wx.PrintPreview
 210         object itself is passed to a wx.PreviewFrame object. Previewing is started by
 211         initializing and showing the preview frame. Unlike wxPrinter.Print, flow of
 212         control returns to the application immediately after the frame is shown.<p><p>
 213 </ul>
 214
 215 <p>Other classes are also demonstrated, but this is the gist of the printer interface
 216 framework in wxPython.
 217
 218 </body>
 219 </html>
 220
 221 """
 222
 223
 224 if __name__ == '__main__':
 225     import sys,os
 226     import run
 227     run.main(['', os.path.basename(sys.argv[0])])
 228