"""rslCalendarForm contains the code for creating a Windows Form with a Calendar control to let the user choose a Date value.
Usage:
execfile(dirname(__file__)+"\\rslCalendarForm.py") #use execfile with the full path to the file name to load the module
frmCalendar = CalendarForm("Window Title") #Create and load the form. GUI thread is blocked until the form is closed
dtSelected = CalendarForm.LastDateSelected #Retrieve selected value from the static CalendarForm.LastDateSelected variable.
"""
#NOTE: Form code taken from http://www.voidspace.org.uk/ironpython/presentation.html and was originally written by Michael Foord
import sys
import clr
clr.AddReference('System.Drawing')
clr.AddReference('System.Windows.Forms')
from System.Windows.Forms import Application, Form
from System.Windows.Forms import Button as frmButton
from System.Windows.Forms import (ControlStyles, ContextMenuStrip, DockStyle, FormStartPosition, ImageList, Keys, MenuStrip, MessageBox, MessageBoxButtons, MessageBoxIcon, Panel, TabControl, TabAlignment, TabPage, ToolStrip, ToolStripButton, ToolStripMenuItem,ToolStripLabel, ToolStripItemDisplayStyle, WebBrowser, Padding, FormBorderStyle,SizeGripStyle) 
from System.Windows.Forms import (MonthCalendar, Day)
from System.Drawing import Size,Point
from System import Uri, Exception, DateTime

class CalendarForm(Form):
    "Windows Form that displays a Calendar control. This will run in the main GUI thread."
    LastDateSelected = None #Static value used to store the last date selected
    
    def __init__(self, Name="Calendar",dtStartDate=None):
        "Name is the title of the control. Callback is a method that accepts a Datetime as a parameter and will be called when the form is closed."
        Form.__init__(self)
        CalendarForm.LastDateSelected = None #Clear last date selection
        self.Text = Name
        self.Name = Name
        self.Width = 210
        self.Height = 230
        self.FormBorderStyle = FormBorderStyle.FixedDialog
        self.SizeGripStyle = SizeGripStyle.Hide
        self.MinimizeBox = False
        self.MaximizeBox = False
        self.initMenu()
        self.initCalendar(dtStartDate)
        self.CenterToParent()
        self.ShowDialog()        

    def createToolstripButton(self, name, text, clickHandler=None, keys=None):
        menuItem = ToolStripButton(Name = name, Text = text)
        if keys:
            menuItem.ShortcutKeys = keys
        if clickHandler:
            menuItem.Click += clickHandler
        return menuItem 
    
    def initMenu(self):         
        menuStrip = MenuStrip(             
            Name = "Main MenuStrip",             
            Dock = DockStyle.Bottom        
        )
        mSpacer = ToolStripLabel("               ")
        mBack = self.createToolstripButton('Save', '&Save', self.onSave)
        mSpacer2 = ToolStripLabel("    ")
        mForward = self.createToolstripButton('Cancel', '&Cancel', self.onCancel)
        menuStrip.Items.Add(mSpacer)
        menuStrip.Items.Add(mBack)
        menuStrip.Items.Add(mSpacer2)
        menuStrip.Items.Add(mForward)
        self.Controls.Add(menuStrip)
        
    def initCalendar(self, StartDate=None):         
        "Setup the Calendar Control."
        pCalendar = Panel(Dock = DockStyle.Fill)
        pCalendar.Padding = Padding(25, 10, 25, 10)
        self.mCalendar = MonthCalendar()
        self.mCalendar.Location = Point (10, 10)
        self.mCalendar.FirstDayOfWeek = Day.Sunday 
        self.mCalendar.ShowTodayCircle = False
        self.mCalendar.ShowToday = False
        self.mCalendar.ShowWeekNumbers = False
        self.mCalendar.MaxSelectionCount = 1
        self.mCalendar.DoubleClick += self.onSave
        if StartDate==None:
            self.mCalendar.SetDate(DateTime.Now)
        else:
            self.mCalendar.SetDate(StartDate)
        pCalendar.Controls.Add(self.mCalendar)
        self.Controls.Add(pCalendar)
    
    def onSave(self, _, __):
        "Set the CalendarForm.LastDateSelected to the selected date and then close the form."
        CalendarForm.LastDateSelected = self.mCalendar.SelectionStart
        self.Close()
        
    def onCancel(self, _, __):
        self.Close()