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Added Optional Dates for DateElement, TimeElement, and DateTimeElement #186

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Added Optional Dates for DateElement, TimeElement, and DateTimeElement #186

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171 changes: 121 additions & 50 deletions MonoTouch.Dialog/Elements.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -1701,30 +1701,39 @@ public virtual void ResignFirstResponder (bool animated)
}

public class DateTimeElement : StringElement {
public DateTime DateValue;

public DateTime? DateValue;
public UIDatePicker datePicker;
public event Action<DateTimeElement> DateSelected;
public Action<DateTimeElement> DateSelected;

public bool IsRequired = false;
public bool IsClearing = false;
public bool IsCancelling = false;

protected internal NSDateFormatter fmt = new NSDateFormatter () {
DateStyle = NSDateFormatterStyle.Short
};

public DateTimeElement (string caption, DateTime date) : base (caption)
{
public DateTimeElement(string caption) : this(caption, null) { }

public DateTimeElement(string caption, DateTime? date) : this(caption, date, true) { }

public DateTimeElement (string caption, DateTime? date, bool isRequired)
: base(caption) {

this.IsRequired = isRequired;
DateValue = date;
Value = FormatDate (date);
}

public override UITableViewCell GetCell (UITableView tv)
{
Value = FormatDate (DateValue);
}

public override UITableViewCell GetCell (UITableView tv) {
Value = FormatDate (this.DateValue);
var cell = base.GetCell (tv);
cell.Accessory = UITableViewCellAccessory.DisclosureIndicator;
return cell;
}

protected override void Dispose (bool disposing)
{

protected override void Dispose (bool disposing) {
base.Dispose (disposing);
if (disposing){
if (fmt != null){
Expand All @@ -1738,32 +1747,36 @@ protected override void Dispose (bool disposing)
}
}

protected DateTime GetDateWithKind (DateTime dt)
{
if (dt.Kind == DateTimeKind.Unspecified)
return DateTime.SpecifyKind (dt, DateTimeKind.Local);

protected DateTime? GetDateWithKind (DateTime? dt) {
if (!dt.HasValue)
return dt;

if (dt.Value.Kind == DateTimeKind.Unspecified)
return DateTime.SpecifyKind (dt.Value, DateTimeKind.Local);

return dt;
}

public virtual string FormatDate (DateTime dt)
{
public virtual string FormatDate (DateTime? dt) {
if (!dt.HasValue)
return string.Empty;

dt = GetDateWithKind (dt);
return fmt.ToString (dt) + " " + dt.ToLocalTime ().ToShortTimeString ();
return fmt.ToString (dt) + " " + dt.Value.ToLocalTime ().ToShortTimeString ();
}

public virtual UIDatePicker CreatePicker ()
{
public virtual UIDatePicker CreatePicker () {
var date = (DateValue.HasValue) ? DateValue.Value : DateTime.Now;

var picker = new UIDatePicker (RectangleF.Empty){
AutoresizingMask = UIViewAutoresizing.FlexibleWidth,
Mode = UIDatePickerMode.DateAndTime,
Date = DateValue
Date = date
};
return picker;
}

static RectangleF PickerFrameWithSize (SizeF size)
{

static RectangleF PickerFrameWithSize (SizeF size) {
var screenRect = UIScreen.MainScreen.ApplicationFrame;
float fY = 0, fX = 0;

Expand All @@ -1783,33 +1796,35 @@ static RectangleF PickerFrameWithSize (SizeF size)

return new RectangleF (fX, fY, size.Width, size.Height);
}

class MyViewController : UIViewController {
DateTimeElement container;
public DialogViewController PresentingDialogController {get;set;}

public MyViewController (DateTimeElement container)
{
public MyViewController (DateTimeElement container) {
this.container = container;
}

public override void ViewWillDisappear (bool animated)
{
public override void ViewWillDisappear (bool animated) {
base.ViewWillDisappear (animated);
container.DateValue = container.datePicker.Date;

// if we are clearing or cancelling, don't set the date
if (!container.IsCancelling && !container.IsClearing)
container.DateValue = container.datePicker.Date;

if (container.DateSelected != null)
container.DateSelected (container);
}

public override void DidRotate (UIInterfaceOrientation fromInterfaceOrientation)
{
public override void DidRotate (UIInterfaceOrientation fromInterfaceOrientation) {
base.DidRotate (fromInterfaceOrientation);
container.datePicker.Frame = PickerFrameWithSize (container.datePicker.SizeThatFits (SizeF.Empty));
}

public bool Autorotate { get; set; }

public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation)
{
[Obsolete]
public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation) {
return Autorotate;
}
}
Expand All @@ -1819,42 +1834,98 @@ public override void Selected (DialogViewController dvc, UITableView tableView,
var vc = new MyViewController (this) {
Autorotate = dvc.Autorotate
};

vc.PresentingDialogController = dvc;

datePicker = CreatePicker ();
datePicker.Frame = PickerFrameWithSize (datePicker.SizeThatFits (SizeF.Empty));

vc.View.BackgroundColor = UIColor.Black;
vc.View.AddSubview (datePicker);

// if the date is required, then we don't want to give the user the option to cancel
// or clear the date.
if (!this.IsRequired)
{
if (DateValue.HasValue)
{
// date has a value. allow user to clear the selected date
vc.NavigationItem.RightBarButtonItem = new UIBarButtonItem("Clear", UIBarButtonItemStyle.Done, (s, e) => {

this.IsClearing = true;

ResetDate(dvc);

this.IsClearing = false;
});
}
else
{
// date isn't set. allow user to cancel date selection
vc.NavigationItem.RightBarButtonItem = new UIBarButtonItem(UIBarButtonSystemItem.Cancel, (s, e) => {

this.IsCancelling = true;

ResetDate(dvc);

this.IsCancelling = false;
});
}
}

dvc.ActivateController (vc);
}

private void ResetDate(DialogViewController dvc) {
DateValue = null;
Value = string.Empty;
dvc.ReloadData();

dvc.DeactivateController(true);
}
}

public class DateElement : DateTimeElement {
public DateElement (string caption, DateTime date) : base (caption, date)
{
public DateElement(string caption) : base(caption) {}

public DateElement (string caption, DateTime? date) : base (caption, date) {
fmt.DateStyle = NSDateFormatterStyle.Medium;
}

public override string FormatDate (DateTime dt)
{
return fmt.ToString (GetDateWithKind (dt));
public DateElement (string caption, DateTime? date, bool isRequired) : base(caption, date, isRequired) {
fmt.DateStyle = NSDateFormatterStyle.Medium;
}

public override UIDatePicker CreatePicker ()
{
public override string FormatDate (DateTime? dt) {
string formattedDate = string.Empty;

if (dt.HasValue)
formattedDate = fmt.ToString (dt.Value.ToLocalTime());

return formattedDate;
}

public override UIDatePicker CreatePicker () {
var picker = base.CreatePicker ();
picker.Mode = UIDatePickerMode.Date;
return picker;
}
}

public class TimeElement : DateTimeElement {
public TimeElement (string caption, DateTime date) : base (caption, date)
{
}
public TimeElement(string caption) : base (caption) { }

public override string FormatDate (DateTime dt)
{
return GetDateWithKind (dt).ToLocalTime ().ToShortTimeString ();
public TimeElement (string caption, DateTime? date) : base (caption, date) { }

public TimeElement (string caption, DateTime? date, bool isRequired) : base (caption, date, isRequired) { }

public override string FormatDate (DateTime? dt) {
string formattedDate = string.Empty;

if (dt.HasValue)
formattedDate = dt.Value.ToLocalTime ().ToShortTimeString ();

return formattedDate;
}

public override UIDatePicker CreatePicker ()
Expand Down
6 changes: 5 additions & 1 deletion Sample/DemoElementApi.cs
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -47,9 +47,13 @@ RootElement CreateRoot ()
},
new Section () {
new EntryElement ("Login", "Your login name", "miguel"),
new EntryElement ("Password", "Your password", "password", true),
new EntryElement ("Password", "Your password", "password", true)
},
new Section () {
new DateElement ("Select Date", DateTime.Now),
new TimeElement ("Select Time", DateTime.Now),
new DateElement ("Date (Optional)", null, false),
new TimeElement ("Time (Optional)", null, false),
},
new Section () {
CreateGeneralSection (),
Expand Down