#!/usr/bin/env python

#############################################################################
##
## Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
##
## This file is part of the example classes of the Qt Toolkit.
##
## This file may be used under the terms of the GNU General Public
## License version 2.0 as published by the Free Software Foundation
## and appearing in the file LICENSE.GPL included in the packaging of
## this file.  Please review the following information to ensure GNU
## General Public Licensing requirements will be met:
## http://www.trolltech.com/products/qt/opensource.html
##
## If you are unsure which license is appropriate for your use, please
## review the following information:
## http://www.trolltech.com/products/qt/licensing.html or contact the
## sales department at sales@trolltech.com.
##
## This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
## WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
##
#############################################################################

import sys
from PyQt4 import QtCore, QtGui


class MainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QMainWindow.__init__(self, parent)
        
        self.selectedDate = QtCore.QDate.currentDate()
        self.fontSize = 10
        self.editor = QtGui.QTextBrowser()
    
        centralWidget = QtGui.QWidget()
    
        dateLabel = QtGui.QLabel(self.tr("Date:"))
        monthCombo = QtGui.QComboBox()
    
        for month in range(1, 13):
            monthCombo.addItem(QtCore.QDate.longMonthName(month))
    
        yearEdit = QtGui.QDateTimeEdit()
        yearEdit.setDisplayFormat("yyyy")
        yearEdit.setDateRange(QtCore.QDate(1753, 1, 1), QtCore.QDate(8000, 1, 1))
    
        monthCombo.setCurrentIndex(self.selectedDate.month() - 1)
        yearEdit.setDate(self.selectedDate)
    
        self.fontSizeLabel = QtGui.QLabel(self.tr("Font size:"))
        self.fontSizeSpinBox = QtGui.QSpinBox()
        self.fontSizeSpinBox.setRange(1, 64)
        self.fontSizeSpinBox.setValue(10)
    
        self.editor = QtGui.QTextBrowser()
        self.insertCalendar()
    
        self.connect(monthCombo, QtCore.SIGNAL("activated(int)"), self.setMonth)
        self.connect(yearEdit, QtCore.SIGNAL("dateChanged(QDate)"), self.setYear)
        self.connect(self.fontSizeSpinBox, QtCore.SIGNAL("valueChanged(int)"), self.setfontSize)
    
        controlsLayout = QtGui.QHBoxLayout()
        controlsLayout.addWidget(dateLabel)
        controlsLayout.addWidget(monthCombo)
        controlsLayout.addWidget(yearEdit)
        controlsLayout.addSpacing(24)
        controlsLayout.addWidget(self.fontSizeLabel)
        controlsLayout.addWidget(self.fontSizeSpinBox)
        controlsLayout.addStretch(1)
    
        centralLayout = QtGui.QVBoxLayout()
        centralLayout.addLayout(controlsLayout)
        centralLayout.addWidget(self.editor, 1)
        centralWidget.setLayout(centralLayout)
    
        self.setCentralWidget(centralWidget)
    
    def insertCalendar(self):
        self.editor.clear()
        cursor = self.editor.textCursor()
    
        date = QtCore.QDate(self.selectedDate.year(), self.selectedDate.month(), 1)
    
        tableFormat = QtGui.QTextTableFormat()
        tableFormat.setAlignment(QtCore.Qt.AlignHCenter)
        tableFormat.setBackground(QtGui.QColor("#e0e0e0"))
        tableFormat.setCellPadding(2)
        tableFormat.setCellSpacing(4)
        constraints = [QtGui.QTextLength(QtGui.QTextLength.PercentageLength, 14),
                       QtGui.QTextLength(QtGui.QTextLength.PercentageLength, 14),
                       QtGui.QTextLength(QtGui.QTextLength.PercentageLength, 14),
                       QtGui.QTextLength(QtGui.QTextLength.PercentageLength, 14),
                       QtGui.QTextLength(QtGui.QTextLength.PercentageLength, 14),
                       QtGui.QTextLength(QtGui.QTextLength.PercentageLength, 14),
                       QtGui.QTextLength(QtGui.QTextLength.PercentageLength, 14)]
        
        tableFormat.setColumnWidthConstraints(constraints)
    
        table = cursor.insertTable(1, 7, tableFormat)
    
        frame = cursor.currentFrame()
        frameFormat = frame.frameFormat()
        frameFormat.setBorder(1)
        frame.setFrameFormat(frameFormat)
    
        format = cursor.charFormat()
        format.setFontPointSize(self.fontSize)
    
        boldFormat = QtGui.QTextCharFormat(format)
        boldFormat.setFontWeight(QtGui.QFont.Bold)
    
        highlightedFormat = QtGui.QTextCharFormat(boldFormat)
        highlightedFormat.setBackground(QtCore.Qt.yellow)
    
        for weekDay in range(1, 8):
            cell = table.cellAt(0, weekDay-1)
            cellCursor = cell.firstCursorPosition()
            cellCursor.insertText(QtCore.QString("%1").arg(QtCore.QDate.longDayName(weekDay)), boldFormat)
    
        table.insertRows(table.rows(), 1)
    
        while date.month() == self.selectedDate.month():
            weekDay = date.dayOfWeek()
            cell = table.cellAt(table.rows()-1, weekDay-1)
            cellCursor = cell.firstCursorPosition()
    
            if date == QtCore.QDate.currentDate():
                cellCursor.insertText(QtCore.QString("%1").arg(date.day()), highlightedFormat)
            else:
                cellCursor.insertText(QtCore.QString("%1").arg(date.day()), format)
    
            date = date.addDays(1)
            
            if weekDay == 7 and date.month() == self.selectedDate.month():
                table.insertRows(table.rows(), 1)
    
        self.setWindowTitle(self.tr("Calendar for %1 %2").arg(QtCore.QDate.longMonthName(self.selectedDate.month())).arg(self.selectedDate.year()))
    
    def setfontSize(self, size):
        self.fontSize = size
        self.insertCalendar()
    
    def setMonth(self, month):
        self.selectedDate = QtCore.QDate(self.selectedDate.year(), month + 1, self.selectedDate.day())
        self.insertCalendar()
    
    def setYear(self, date):
        self.selectedDate = QtCore.QDate(date.year(), self.selectedDate.month(), self.selectedDate.day())
        self.insertCalendar()


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    window = MainWindow()
    window.resize(640, 256)
    window.show()
    sys.exit(app.exec_())