eric7/QScintilla/Printer.py

# -*- coding: utf-8 -*-

# Copyright (c) 2006 - 2021 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the printer functionality.
"""

from PyQt6.QtCore import QTime, QDate, Qt, QCoreApplication, QMarginsF
from PyQt6.QtGui import QColor, QPageLayout
from PyQt6.QtPrintSupport import QPrinter
from PyQt6.Qsci import QsciPrinter

import Preferences


class Printer(QsciPrinter):
    """
    Class implementing the QsciPrinter with a header.
    """
    def __init__(self, mode=QPrinter.PrinterMode.ScreenResolution):
        """
        Constructor
        
        @param mode mode of the printer (QPrinter.PrinterMode)
        """
        super().__init__(mode)
        
        self.setMagnification(Preferences.getPrinter("Magnification"))
        if Preferences.getPrinter("ColorMode"):
            self.setColorMode(QPrinter.ColorMode.Color)
        else:
            self.setColorMode(QPrinter.ColorMode.GrayScale)
        if Preferences.getPrinter("FirstPageFirst"):
            self.setPageOrder(QPrinter.PageOrder.FirstPageFirst)
        else:
            self.setPageOrder(QPrinter.PageOrder.LastPageFirst)
        self.setPageMargins(QMarginsF(
            Preferences.getPrinter("LeftMargin") * 10,
            Preferences.getPrinter("TopMargin") * 10,
            Preferences.getPrinter("RightMargin") * 10,
            Preferences.getPrinter("BottomMargin") * 10),
            QPageLayout.Unit.Millimeter
        )
        printerName = Preferences.getPrinter("PrinterName")
        if printerName:
            self.setPrinterName(printerName)
        self.time = QTime.currentTime().toString(Qt.DateFormat.RFC2822Date)
        self.date = QDate.currentDate().toString(Qt.DateFormat.RFC2822Date)
        self.headerFont = Preferences.getPrinter("HeaderFont")
        
    def formatPage(self, painter, drawing, area, pagenr):
        """
        Public method to generate a header line.
        
        @param painter the paint canvas (QPainter)
        @param drawing flag indicating that something should be drawn
        @param area the drawing area (QRect)
        @param pagenr the page number (int)
        """
        fn = self.docName()
        
        header = QCoreApplication.translate(
            'Printer', '{0} - Printed on {1}, {2} - Page {3}'
        ).format(fn, self.date, self.time, pagenr)
        
        painter.save()
        painter.setFont(self.headerFont)    # set our header font
        painter.setPen(QColor(Qt.GlobalColor.black))            # set color
        if drawing:
            fm = painter.fontMetrics()
            try:
                fmWidth = fm.horizontalAdvance(header)
            except AttributeError:
                fmWidth = fm.width(header)
            painter.drawText(
                area.right() - fmWidth,
                area.top() + painter.fontMetrics().ascent(), header)
        area.setTop(area.top() + painter.fontMetrics().height() + 5)
        painter.restore()