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## Printer.py
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## Printing frame work
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#from wxPython.wx import wxPrintout, wxPrintData, wxPAPER_LETTER, wxPrintDialogData
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#from wxPython.wx import wxPrinter, wxMessageBox, wxPrintPreview, wxPrintDialog
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from wxPython.wx import *
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def GetErrorText():
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"Put your error text logic here. See Python Cookbook for a useful example of error text."
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return "Some error occurred."
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class Printer(wxPrintout):
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def __init__(self, frame):
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"Prepares the Printing object. Note: change current_y for 1, 1.5, 2 spacing for lines. "
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wxPrintout.__init__(self)
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self.printer_config = wxPrintData()
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self.printer_config.SetPaperId(wxPAPER_LETTER)
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self.frame = frame
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self.doc_text = ''
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self.doc_name = ''
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self.current_y = 15 #y should be either (15, 22, 30)
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if self.current_y == 15:
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self.num_lines_per_page = 50
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elif self.current_y == 22:
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self.num_lines_per_page = 35
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else:
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self.num_lines_per_page = 25
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def Print(self, text, doc_name):
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"Prints the given text. Currently doc_name logic doesn't exist. E.g. might be useful for a footer.."
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self.doc_text = text
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self.doc_name = doc_name
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pdd = wxPrintDialogData()
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pdd.SetPrintData(self.printer_config)
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printer = wxPrinter(pdd)
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## if not printer.Print(self.frame,self):
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## wxMessageBox("Unable to print the document.")
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## else:
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self.printer_config = printer.GetPrintDialogData().GetPrintData()
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def PreviewText(self, text, doc_name):
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"This function displays the preview window for the text with the given header."
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try:
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self.doc_name = doc_name
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self.doc_text = text
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#Destructor fix by Peter Milliken --
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print1 = Printer(self.frame, text = self.doc_text)
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print2 = Printer(self.frame, text = self.doc_text)
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preview = wxPrintPreview(print1, print2, self.printer_config)
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#preview = wxPrintPreview(self,self,self.printer_config)
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if not preview.Ok():
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wxMessageBox("Unable to display preview of document.")
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return
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preview_window = PreviewFrame(preview, self.frame, "Print Preview - %s" % doc_name)
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preview_window.Initialize()
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preview_window.SetPosition(self.frame.GetPosition())
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preview_window.SetSize(self.frame.GetSize())
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preview_window.MakeModal(TRUE)
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preview_window.Show(TRUE)
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except:
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wxMessageBox(GetErrorText())
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def PageSetup(self):
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"This function handles displaying the Page Setup window and retrieving the user selected options."
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config_dialog = wxPrintDialog(self.frame)
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config_dialog.GetPrintDialogData().SetPrintData(self.printer_config)
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config_dialog.GetPrintDialogData().SetSetupDialog(TRUE)
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config_dialog.ShowModal()
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self.printer_config = config_dialog.GetPrintDialogData().GetPrintData()
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config_dialog.Destroy()
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def OnBeginDocument(self,start,end):
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"Do any end of document logic here."
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return self.base_OnBeginDocument(start,end)
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def OnEndDocument(self):
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"Do any end of document logic here."
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self.base_OnEndDocument()
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def OnBeginPrinting(self):
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"Do printing initialization logic here."
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self.base_OnBeginPrinting()
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def OnEndPrinting(self):
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"Do any post printing logic here."
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self.base_OnEndPrinting()
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def OnPreparePrinting(self):
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"Do any logic to prepare for printing here."
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self.base_OnPreparePrinting()
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def HasPage(self, page_num):
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"This function is called to determine if the specified page exists."
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return len(self.GetPageText(page_num)) > 0
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def GetPageInfo(self):
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"""
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This returns the page information: what is the page range available, and what is the selected page range.
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Currently the selected page range is always the available page range. This logic should be changed if you need
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greater flexibility.
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"""
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minPage = 1
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maxPage = int(len(self.doc_text.split('\n'))/self.num_lines_per_page)
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fromPage, toPage = minPage, maxPage
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return (minPage,maxPage,fromPage,toPage)
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def OnPrintPage(self, page_num):
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"This function / event is executed for each page that needs to be printed."
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dc = self.GetDC()
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x,y = 25, self.current_y
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if not self.IsPreview():
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y *=4
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line_count = 1
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for line in self.GetPageText(page_num):
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dc.DrawText(line, x, y*line_count)
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line_count += 1
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return TRUE
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def GetPageText(self, page_num):
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"This function returns the text to be displayed for the given page number."
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lines = self.doc_text.split('\n')
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lines_for_page = lines[(page_num -1)*self.num_lines_per_page: page_num*(self.num_lines_per_page-1)]
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return lines_for_page |
