Added the sample code from wxPython In Action to the samples dir
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42925 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robin Dunn
236
wxPython/samples/wxPIA_book/Chapter-17/printing.py
Executable file
236
wxPython/samples/wxPIA_book/Chapter-17/printing.py
Executable file
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import wx
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import os
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FONTSIZE = 10
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class TextDocPrintout(wx.Printout):
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"""
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A printout class that is able to print simple text documents.
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Does not handle page numbers or titles, and it assumes that no
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lines are longer than what will fit within the page width. Those
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features are left as an exercise for the reader. ;-)
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"""
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def __init__(self, text, title, margins):
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wx.Printout.__init__(self, title)
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self.lines = text.split('\n')
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self.margins = margins
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def HasPage(self, page):
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return page <= self.numPages
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def GetPageInfo(self):
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return (1, self.numPages, 1, self.numPages)
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def CalculateScale(self, dc):
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# Scale the DC such that the printout is roughly the same as
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# the screen scaling.
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ppiPrinterX, ppiPrinterY = self.GetPPIPrinter()
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ppiScreenX, ppiScreenY = self.GetPPIScreen()
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logScale = float(ppiPrinterX)/float(ppiScreenX)
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# Now adjust if the real page size is reduced (such as when
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# drawing on a scaled wx.MemoryDC in the Print Preview.) If
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# page width == DC width then nothing changes, otherwise we
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# scale down for the DC.
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pw, ph = self.GetPageSizePixels()
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dw, dh = dc.GetSize()
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scale = logScale * float(dw)/float(pw)
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# Set the DC's scale.
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dc.SetUserScale(scale, scale)
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# Find the logical units per millimeter (for calculating the
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# margins)
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self.logUnitsMM = float(ppiPrinterX)/(logScale*25.4)
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def CalculateLayout(self, dc):
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# Determine the position of the margins and the
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# page/line height
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topLeft, bottomRight = self.margins
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dw, dh = dc.GetSize()
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self.x1 = topLeft.x * self.logUnitsMM
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self.y1 = topLeft.y * self.logUnitsMM
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self.x2 = dc.DeviceToLogicalXRel(dw) - bottomRight.x * self.logUnitsMM
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self.y2 = dc.DeviceToLogicalYRel(dh) - bottomRight.y * self.logUnitsMM
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# use a 1mm buffer around the inside of the box, and a few
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# pixels between each line
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self.pageHeight = self.y2 - self.y1 - 2*self.logUnitsMM
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font = wx.Font(FONTSIZE, wx.TELETYPE, wx.NORMAL, wx.NORMAL)
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dc.SetFont(font)
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self.lineHeight = dc.GetCharHeight()
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self.linesPerPage = int(self.pageHeight/self.lineHeight)
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def OnPreparePrinting(self):
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# calculate the number of pages
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dc = self.GetDC()
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self.CalculateScale(dc)
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self.CalculateLayout(dc)
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self.numPages = len(self.lines) / self.linesPerPage
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if len(self.lines) % self.linesPerPage != 0:
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self.numPages += 1
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def OnPrintPage(self, page):
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dc = self.GetDC()
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self.CalculateScale(dc)
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self.CalculateLayout(dc)
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# draw a page outline at the margin points
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dc.SetPen(wx.Pen("black", 0))
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dc.SetBrush(wx.TRANSPARENT_BRUSH)
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r = wx.RectPP((self.x1, self.y1),
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(self.x2, self.y2))
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dc.DrawRectangleRect(r)
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dc.SetClippingRect(r)
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# Draw the text lines for this page
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line = (page-1) * self.linesPerPage
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x = self.x1 + self.logUnitsMM
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y = self.y1 + self.logUnitsMM
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while line < (page * self.linesPerPage):
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dc.DrawText(self.lines[line], x, y)
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y += self.lineHeight
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line += 1
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if line >= len(self.lines):
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break
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return True
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class PrintFrameworkSample(wx.Frame):
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def __init__(self):
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wx.Frame.__init__(self, None, size=(640, 480),
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title="Print Framework Sample")
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self.CreateStatusBar()
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# A text widget to display the doc and let it be edited
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self.tc = wx.TextCtrl(self, -1, "",
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style=wx.TE_MULTILINE|wx.TE_DONTWRAP)
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self.tc.SetFont(wx.Font(FONTSIZE, wx.TELETYPE, wx.NORMAL, wx.NORMAL))
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filename = os.path.join(os.path.dirname(__file__), "sample-text.txt")
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self.tc.SetValue(open(filename).read())
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self.tc.Bind(wx.EVT_SET_FOCUS, self.OnClearSelection)
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wx.CallAfter(self.tc.SetInsertionPoint, 0)
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# Create the menu and menubar
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menu = wx.Menu()
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item = menu.Append(-1, "Page Setup...\tF5",
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"Set up page margins and etc.")
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self.Bind(wx.EVT_MENU, self.OnPageSetup, item)
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item = menu.Append(-1, "Print Preview...\tF6",
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"View the printout on-screen")
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self.Bind(wx.EVT_MENU, self.OnPrintPreview, item)
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item = menu.Append(-1, "Print...\tF7", "Print the document")
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self.Bind(wx.EVT_MENU, self.OnPrint, item)
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menu.AppendSeparator()
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## item = menu.Append(-1, "Test other stuff...\tF9", "")
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## self.Bind(wx.EVT_MENU, self.OnPrintTest, item)
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## menu.AppendSeparator()
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item = menu.Append(wx.ID_EXIT, "E&xit\tCtrl-Q", "Close this application")
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self.Bind(wx.EVT_MENU, self.OnExit, item)
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menubar = wx.MenuBar()
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menubar.Append(menu, "&File")
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self.SetMenuBar(menubar)
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# initialize the print data and set some default values
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self.pdata = wx.PrintData()
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self.pdata.SetPaperId(wx.PAPER_LETTER)
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self.pdata.SetOrientation(wx.PORTRAIT)
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self.margins = (wx.Point(15,15), wx.Point(15,15))
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def OnExit(self, evt):
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self.Close()
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def OnClearSelection(self, evt):
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evt.Skip()
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wx.CallAfter(self.tc.SetInsertionPoint,
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self.tc.GetInsertionPoint())
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def OnPageSetup(self, evt):
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data = wx.PageSetupDialogData()
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data.SetPrintData(self.pdata)
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data.SetDefaultMinMargins(True)
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data.SetMarginTopLeft(self.margins[0])
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data.SetMarginBottomRight(self.margins[1])
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dlg = wx.PageSetupDialog(self, data)
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if dlg.ShowModal() == wx.ID_OK:
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data = dlg.GetPageSetupData()
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self.pdata = wx.PrintData(data.GetPrintData()) # force a copy
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self.pdata.SetPaperId(data.GetPaperId())
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self.margins = (data.GetMarginTopLeft(),
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data.GetMarginBottomRight())
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dlg.Destroy()
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def OnPrintPreview(self, evt):
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data = wx.PrintDialogData(self.pdata)
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text = self.tc.GetValue()
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printout1 = TextDocPrintout(text, "title", self.margins)
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printout2 = None #TextDocPrintout(text, "title", self.margins)
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preview = wx.PrintPreview(printout1, printout2, data)
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if not preview.Ok():
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wx.MessageBox("Unable to create PrintPreview!", "Error")
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else:
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# create the preview frame such that it overlays the app frame
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frame = wx.PreviewFrame(preview, self, "Print Preview",
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pos=self.GetPosition(),
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size=self.GetSize())
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frame.Initialize()
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frame.Show()
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def OnPrint(self, evt):
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data = wx.PrintDialogData(self.pdata)
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printer = wx.Printer(data)
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text = self.tc.GetValue()
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printout = TextDocPrintout(text, "title", self.margins)
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useSetupDialog = True
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if not printer.Print(self, printout, useSetupDialog) \
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and printer.GetLastError() == wx.PRINTER_ERROR:
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wx.MessageBox(
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"There was a problem printing.\n"
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"Perhaps your current printer is not set correctly?",
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"Printing Error", wx.OK)
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else:
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data = printer.GetPrintDialogData()
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self.pdata = wx.PrintData(data.GetPrintData()) # force a copy
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printout.Destroy()
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def OnPrintTest(self, evt):
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data = wx.PrintDialogData(self.pdata)
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dlg = wx.PrintDialog(self, data)
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if dlg.ShowModal() == wx.ID_OK:
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data = dlg.GetPrintDialogData()
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print
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print "GetFromPage:", data.GetFromPage()
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print "GetToPage:", data.GetToPage()
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print "GetMinPage:", data.GetMinPage()
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print "GetMaxPage:", data.GetMaxPage()
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print "GetNoCopies:", data.GetNoCopies()
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print "GetAllPages:", data.GetAllPages()
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print "GetSelection:", data.GetSelection()
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print "GetCollate:", data.GetCollate()
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print "GetPrintToFile:", data.GetPrintToFile()
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self.pdata = wx.PrintData(data.GetPrintData())
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print
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print "GetPrinterName:", self.pdata.GetPrinterName()
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dlg.Destroy()
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app = wx.PySimpleApp()
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frm = PrintFrameworkSample()
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frm.Show()
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app.MainLoop()
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