# 11/13/2003 - Jeff Grimmett (grimmtooth@softhome.net)
#
# o Updated for wx namespace
# o Got rid of static buton IDs
# o Took at a stab at a lucid overview string.
#
import wx
import ScrolledWindow
#----------------------------------------------------------------------
ID_Setup = wx.NewId()
ID_Preview = wx.NewId()
ID_Print = wx.NewId()
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("wx.Printout.OnBeginDocument\n")
return self.base_OnBeginDocument(start, end)
def OnEndDocument(self):
self.log.WriteText("wx.Printout.OnEndDocument\n")
self.base_OnEndDocument()
def OnBeginPrinting(self):
self.log.WriteText("wx.Printout.OnBeginPrinting\n")
self.base_OnBeginPrinting()
def OnEndPrinting(self):
self.log.WriteText("wx.Printout.OnEndPrinting\n")
self.base_OnEndPrinting()
def OnPreparePrinting(self):
self.log.WriteText("wx.Printout.OnPreparePrinting\n")
self.base_OnPreparePrinting()
def HasPage(self, page):
self.log.WriteText("wx.Printout.HasPage: %d\n" % page)
if page <= 2:
return True
else:
return False
def GetPageInfo(self):
self.log.WriteText("wx.Printout.GetPageInfo\n")
return (1, 2, 1, 2)
def OnPrintPage(self, page):
self.log.WriteText("wx.Printout.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.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, ID_Setup, "Print Setup")
self.Bind(wx.EVT_BUTTON, self.OnPrintSetup, id=ID_Setup)
subbox.Add(btn, 1, wx.GROW | wx.ALL, 2)
btn = wx.Button(self, ID_Preview, "Print Preview")
self.Bind(wx.EVT_BUTTON, self.OnPrintPreview, id=ID_Preview)
subbox.Add(btn, 1, wx.GROW | wx.ALL, 2)
btn = wx.Button(self, ID_Print, "Print")
self.Bind(wx.EVT_BUTTON, self.OnDoPrint, id=ID_Print)
subbox.Add(btn, 1, wx.GROW | wx.ALL, 2)
self.box.Add(subbox, 0, wx.GROW)
self.SetAutoLayout(True)
self.SetSizer(self.box)
def OnPrintSetup(self, event):
printerDialog = wx.PrintDialog(self)
printerDialog.GetPrintDialogData().SetPrintData(self.printData)
printerDialog.GetPrintDialogData().SetSetupDialog(True)
printerDialog.ShowModal();
self.printData = printerDialog.GetPrintDialogData().GetPrintData()
printerDialog.Destroy()
def OnPrintPreview(self, event):
self.log.WriteText("OnPrintPreview\n")
printout = MyPrintout(self.canvas, self.log)
printout2 = MyPrintout(self.canvas, self.log)
self.preview = wx.PrintPreview(printout, printout2, self.printData)
if not self.preview.Ok():
self.log.WriteText("Houston, we have a problem...\n")
return
frame = wx.PreviewFrame(self.preview, self.frame, "This is a print preview")
frame.Initialize()
frame.SetPosition(self.frame.GetPosition())
frame.SetSize(self.frame.GetSize())
frame.Show(True)
def OnDoPrint(self, event):
pdd = wx.PrintDialogData()
pdd.SetPrintData(self.printData)
printer = wx.Printer(pdd)
printout = MyPrintout(self.canvas, self.log)
if not printer.Print(self.frame, printout):
wx.MessageBox("There was a problem printing.\nPerhaps your current printer is not set correctly?", "Printing", wx.OK)
else:
self.printData = printer.GetPrintDialogData().GetPrintData()
printout.Destroy()
#----------------------------------------------------------------------
def runTest(frame, nb, log):
win = TestPrintPanel(nb, frame, log)
return win
#----------------------------------------------------------------------
overview = """\
PrintFramework
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.
Classes demonstrated here:
- wx.Printout() - 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.
- wx.PrintData() - 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.
- wx.PrintDialog() - This class represents the print and print setup
common dialogs. You may obtain a wx.PrinterDC device context from a
successfully dismissed print dialog.
- wx.PrintPreview() - 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.
Other classes are also demonstrated, but this is the gist of the printer interface
framework in wxPython.
"""
if __name__ == '__main__':
import sys,os
import run
run.main(['', os.path.basename(sys.argv[0])])