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nicwise/gist:9629210

Created March 18, 2014 20:46
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  1. nicwise created this gist Mar 18, 2014.
    284 changes: 284 additions & 0 deletions gistfile1.cs
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,284 @@
    using System;
    using MonoTouch.Dialog;
    using MonoTouch.UIKit;
    using System.Drawing;
    using MonoTouch.Foundation;
    using System.Collections.Generic;
    using System.Globalization;

    namespace TravelBudget
    {
    public class StyledExpandableDateElement : Element, IElementSizing
    {
    public Action<DateTime> ValueChanged;
    DateTime _time = DateTime.Now;

    public DateTime Value
    {
    get { return _time; }
    set
    {
    if (_time != value)
    {
    _time = value;

    UpdateText ();

    if (ValueChanged != null)
    ValueChanged (Value);
    }
    }
    }

    UIDatePickerMode _mode;

    public UIDatePickerMode Mode
    {
    get { return _mode; }
    set
    {
    _mode = value;
    }
    }

    readonly RootElement _root;
    readonly Section _section;
    UIDatePicker _picker;
    Element _pickerElement;
    UITableViewCell _cell;
    bool minDateSet = false;
    bool maxDateSet = false;
    DateTime maxDate = DateTime.MaxValue;
    DateTime minDate = DateTime.MinValue;

    public DateTime MaxDate
    {
    get
    {
    return maxDate;
    }
    set
    {
    maxDate = value;
    maxDateSet = true;
    }
    }

    public DateTime MinDate
    {
    get
    {
    return minDate;
    }
    set
    {
    minDate = value;
    minDateSet = true;
    }
    }

    public StyledExpandableDateElement (string caption, DateTime dateTime, UIDatePickerMode mode, RootElement root, Section section) : base (caption)
    {
    Mode = mode;

    //Handle issues where time values are set and the date isn't. This leads to odd behavor.
    if (mode == UIDatePickerMode.Time)
    {
    if (dateTime.Year < 2000)
    {
    var currentDate = DateTime.Now;
    dateTime = new DateTime (currentDate.Year, currentDate.Month, currentDate.Day, dateTime.Hour, dateTime.Minute, dateTime.Second);
    }
    }

    Value = dateTime;
    _root = root;
    _section = section;
    }

    public override UITableViewCell GetCell (UITableView tv)
    {
    const string cellKey = "StyledExpandableDateElement";
    var cell = tv.DequeueReusableCell (cellKey);

    if (cell == null)
    {
    cell = new UITableViewCell (UITableViewCellStyle.Value1, cellKey);
    cell.TextLabel.Font = UIFont.SystemFontOfSize (17f);
    cell.TextLabel.TextColor = UIColor.Black;
    cell.TextLabel.AdjustsFontSizeToFitWidth = true;
    cell.TextLabel.MinimumScaleFactor = .5f;
    cell.Accessory = UITableViewCellAccessory.None;
    cell.SelectionStyle = UITableViewCellSelectionStyle.None;

    cell.DetailTextLabel.Font = UIFont.SystemFontOfSize (16f);
    cell.DetailTextLabel.TextColor = UIColor.LightGray;
    cell.DetailTextLabel.AdjustsFontSizeToFitWidth = true;
    cell.DetailTextLabel.MinimumScaleFactor = .5f;
    }

    _cell = cell;

    cell.TextLabel.Text = Caption;
    UpdateText ();

    return cell;

    }

    public float GetHeight (UITableView tableView, NSIndexPath indexPath)
    {
    return 44;
    }

    protected internal NSDateFormatter fmt = new NSDateFormatter () {
    DateStyle = NSDateFormatterStyle.Medium,
    TimeZone = NSTimeZone.LocalTimeZone
    };
    protected internal NSDateFormatter fullFormat = new NSDateFormatter () {
    DateFormat = "yyyy-MM-dd'|'HH:mm",
    TimeZone = NSTimeZone.LocalTimeZone
    };

    public void Contract()
    {
    if (_picker != null)
    {
    _section.Remove (_pickerElement);
    //_root.Reload (_section, UITableViewRowAnimation.Fade);
    _pickerElement.Dispose ();
    _picker.Dispose ();
    _pickerElement = null;
    _picker = null;
    _cell.DetailTextLabel.TextColor = UIColor.LightGray;
    }
    }

    public override void Selected (DialogViewController dvc, UITableView tableView, NSIndexPath path)
    {
    base.Selected (dvc, tableView, path);

    _root.TableView.EndEditing (true);

    if (_picker == null)
    {

    var otherExpandableItems = new List<StyledExpandableDateElement> ();
    foreach(var element in _section)
    {
    if (element is StyledExpandableDateElement && element != this)
    {
    otherExpandableItems.Add (element as StyledExpandableDateElement);
    }
    }

    foreach(var element in otherExpandableItems)
    {
    element.Contract ();
    }



    int left = 0;
    _picker = new UIDatePicker (new RectangleF (left, 0, 320, 200)) {
    Mode = Mode,
    Date = Value,
    TimeZone = NSTimeZone.LocalTimeZone
    };
    _picker.TimeZone = NSTimeZone.LocalTimeZone;

    if (minDateSet)
    _picker.MinimumDate = minDate;
    if (maxDateSet)
    _picker.MaximumDate = maxDate;

    _picker.BackgroundColor = UIColor.White;

    _picker.ValueChanged += (object sender, EventArgs e) =>
    {

    UIDatePicker picker = sender as UIDatePicker;


    string internalAsString = fullFormat.ToString (_picker.Date);

    DateTime dt;
    if (DateTime.TryParseExact (internalAsString, "yyyy-MM-dd|HH:mm", CultureInfo.InvariantCulture, DateTimeStyles.AssumeLocal, out dt))
    {
    Value = dt;
    } else
    {
    Value = _picker.Date;
    }

    Console.WriteLine("Value: " + Value);
    };

    _cell.DetailTextLabel.TextColor = UIColor.Blue;

    _pickerElement = new UIViewElement ("", _picker, true);

    var idx = _section.Elements.IndexOf (this);

    var elements = new List<Element> {
    _pickerElement
    };

    _section.Insert (idx + 1, UITableViewRowAnimation.Top, elements);
    _root.TableView.ScrollToRow (IndexPath, UITableViewScrollPosition.Bottom, true);
    } else
    {
    Contract ();

    _root.TableView.ScrollToRow (IndexPath, UITableViewScrollPosition.Middle, true);
    }
    }

    void UpdateText ()
    {
    string text;
    switch (Mode)
    {
    case UIDatePickerMode.Date:
    text = Value.ToShortDateString ();
    break;
    case UIDatePickerMode.DateAndTime:
    text = Value.ToShortDateString () + " " + Value.ToShortTimeString ();
    break;
    case UIDatePickerMode.Time:
    text = Value.ToShortTimeString ();
    break;
    default:
    text = "";
    break;
    }

    if (_cell != null)
    {
    _cell.DetailTextLabel.Text = text;
    }

    }

    protected override void Dispose (bool disposing)
    {
    if (disposing)
    {
    if (_picker != null)
    {
    _picker.Dispose ();
    }

    if (_pickerElement != null)
    {
    _pickerElement.Dispose ();
    }

    _cell = null;

    }
    base.Dispose (disposing);
    }
    }
    }