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import wx
import ScrolledWindow
#----------------------------------------------------------------------
class MyPrintout(wx.Printout):
def __init__(self, canvas, log):
wx.Printout.__init__(self)
self.canvas = canvas
self.log = log
def OnBeginDocument(self, start, end):
self.log.WriteText("MyPrintout.OnBeginDocument\n")
return super(MyPrintout, self).OnBeginDocument(start, end)
def OnEndDocument(self):
self.log.WriteText("MyPrintout.OnEndDocument\n")
super(MyPrintout, self).OnEndDocument()
def OnBeginPrinting(self):
self.log.WriteText("MyPrintout.OnBeginPrinting\n")
super(MyPrintout, self).OnBeginPrinting()
def OnEndPrinting(self):
self.log.WriteText("MyPrintout.OnEndPrinting\n")
super(MyPrintout, self).OnEndPrinting()
def OnPreparePrinting(self):
self.log.WriteText("MyPrintout.OnPreparePrinting\n")
super(MyPrintout, self).OnPreparePrinting()
def HasPage(self, page):
self.log.WriteText("MyPrintout.HasPage: %d\n" % page)
if page <= 2:
return True
else:
return False
def GetPageInfo(self):
self.log.WriteText("MyPrintout.GetPageInfo\n")
return (1, 2, 1, 2)
def OnPrintPage(self, page):
self.log.WriteText("MyPrintout.OnPrintPage: %d\n" % page)
dc = self.GetDC()
#-------------------------------------------
# One possible method of setting scaling factors...
maxX = self.canvas.getWidth()
maxY = self.canvas.getHeight()
# Let's have at least 50 device units margin
marginX = 50
marginY = 50
# Add the margin to the graphic size
maxX = maxX + (2 * marginX)
maxY = maxY + (2 * marginY)
# Get the size of the DC in pixels
(w, h) = dc.GetSizeTuple()
# Calculate a suitable scaling factor
scaleX = float(w) / maxX
scaleY = float(h) / maxY
# Use x or y scaling factor, whichever fits on the DC
actualScale = min(scaleX, scaleY)
# Calculate the position on the DC for centering the graphic
posX = (w - (self.canvas.getWidth() * actualScale)) / 2.0
posY = (h - (self.canvas.getHeight() * actualScale)) / 2.0
# Set the scale and origin
dc.SetUserScale(actualScale, actualScale)
dc.SetDeviceOrigin(int(posX), int(posY))
#-------------------------------------------
self.canvas.DoDrawing(dc, True)
dc.DrawText("Page: %d" % page, marginX/2, maxY-marginY)
return True
#----------------------------------------------------------------------
class TestPrintPanel(wx.Panel):
def __init__(self, parent, frame, log):
wx.Panel.__init__(self, parent, -1)
self.log = log
self.frame = frame
self.printData = wx.PrintData()
self.printData.SetPaperId(wx.PAPER_LETTER)
self.printData.SetPrintMode(wx.PRINT_MODE_PRINTER)
self.box = wx.BoxSizer(wx.VERTICAL)
self.canvas = ScrolledWindow.MyCanvas(self)
self.box.Add(self.canvas, 1, wx.GROW)
subbox = wx.BoxSizer(wx.HORIZONTAL)
btn = wx.Button(self, -1, "Page Setup")
self.Bind(wx.EVT_BUTTON, self.OnPageSetup, btn)
subbox.Add(btn, 1, wx.GROW | wx.ALL, 2)
btn = wx.Button(self, -1, "Print Preview")
self.Bind(wx.EVT_BUTTON, self.OnPrintPreview, btn)
subbox.Add(btn, 1, wx.GROW | wx.ALL, 2)
btn = wx.Button(self, -1, "Print")
self.Bind(wx.EVT_BUTTON, self.OnDoPrint, btn)
subbox.Add(btn, 1, wx.GROW | wx.ALL, 2)
self.box.Add(subbox, 0, wx.GROW)
self.SetAutoLayout(True)
self.SetSizer(self.box)
def OnPageSetup(self, evt):
psdd = wx.PageSetupDialogData(self.printData)
psdd.EnablePrinter(True)
psdd.CalculatePaperSizeFromId()
dlg = wx.PageSetupDialog(self, psdd)
dlg.ShowModal()
# this makes a copy of the wx.PrintData instead of just saving
# a reference to the one inside the PrintDialogData that will
# be destroyed when the dialog is destroyed
self.printData = wx.PrintData( dlg.GetPageSetupData().GetPrintData() )
dlg.Destroy()
def OnPrintPreview(self, event):
data = wx.PrintDialogData(self.printData)
printout = MyPrintout(self.canvas, self.log)
printout2 = MyPrintout(self.canvas, self.log)
self.preview = wx.PrintPreview(printout, printout2, data)
if not self.preview.Ok():
self.log.WriteText("Houston, we have a problem...\n")
return
pfrm = wx.PreviewFrame(self.preview, self.frame, "This is a print preview")
pfrm.Initialize()
pfrm.SetPosition(self.frame.GetPosition())
pfrm.SetSize(self.frame.GetSize())
pfrm.Show(True)
def OnDoPrint(self, event):
pdd = wx.PrintDialogData(self.printData)
pdd.SetToPage(2)
printer = wx.Printer(pdd)
printout = MyPrintout(self.canvas, self.log)
if not printer.Print(self.frame, printout, True):
wx.MessageBox("There was a problem printing.\nPerhaps your current printer is not set correctly?", "Printing", wx.OK)
else:
self.printData = wx.PrintData( printer.GetPrintDialogData().GetPrintData() )
printout.Destroy()
#----------------------------------------------------------------------
def runTest(frame, nb, log):
win = TestPrintPanel(nb, frame, log)
return win
#----------------------------------------------------------------------
overview = """\
<html>
<body>
<h1>PrintFramework</h1>
This is an overview of the classes and methods used to print documents.
It also demonstrates how to do print previews and invoke the printer
setup dialog.
<p>Classes demonstrated here:<P>
<ul>
<li><b>wx.Printout()</b> - This class encapsulates the functionality of printing out
an application document. A new class must be derived and members overridden
to respond to calls such as OnPrintPage and HasPage. Instances of this class
are passed to wx.Printer.Print() or a wx.PrintPreview object to initiate
printing or previewing.<P><p>
<li><b>wx.PrintData()</b> - This class holds a variety of information related to
printers and printer device contexts. This class is used to create a
wx.PrinterDC and a wx.PostScriptDC. It is also used as a data member of
wx.PrintDialogData and wx.PageSetupDialogData, as part of the mechanism for
transferring data between the print dialogs and the application.<p><p>
<li><b>wx.PrintDialog()</b> - This class represents the print and print setup
common dialogs. You may obtain a wx.PrinterDC device context from a
successfully dismissed print dialog.<p><p>
<li><b>wx.PrintPreview()</b> - Objects of this class manage the print preview
process. The object is passed a wx.Printout object, and the wx.PrintPreview
object itself is passed to a wx.PreviewFrame object. Previewing is started by
initializing and showing the preview frame. Unlike wxPrinter.Print, flow of
control returns to the application immediately after the frame is shown.<p><p>
</ul>
<p>Other classes are also demonstrated, but this is the gist of the printer interface
framework in wxPython.
</body>
</html>
"""
if __name__ == '__main__':
import sys,os
import run
run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
|
