public MaskValidatePage ()
{
var rules = new List<Validation> ();
rules.Add (new Validation(Validators.MAX, "10", "Max length is 10"));
maxLength = new MyEntry ();
maxLength.Text = "";
maxLength.FormatCharacters = "-";
maxLength.ValidationRules = rules;
var rules2 = new List<Validation> ();
rules2.Add (new Validation(Validators.ONLYCHARS, "[1-9]", "Only enter 1,2,3,4,5,6,7,8,9"));
maxOnlyChars = new MyEntry ();
maxOnlyChars.Text = "";
maxOnlyChars.FormatCharacters = "-";
maxOnlyChars.ValidationRules = rules2;
// validation of a mask. beta.
// maskValidation = new MyEntry ();
// maskValidation.Text = "Asasd";
// maskValidation.FormatCharacters = "-";
// maskValidation.ValidCharacters = "[A-Za-z]";
// maskValidation.Mask = new System.Collections.Generic.List<MaskRules> (
// new[] {
// new MaskRules {
// Start = 0,
// End = 5,
// Mask = "",
// startC = "ABC",
// startCCase = false,
// endC = "bC",
// endCase = false
// },
// new MaskRules { Start = 5, End = 9, Mask = "{0:5}-{5:}"},
// });
// add event handler.
// in production code, make sure you unsubscribe to this event
maxLength.OnValidationError += MaxLength_OnValidationError;
maxOnlyChars.OnValidationError += MaxLength_OnValidationError;
this.Content = new StackLayout {
Children = {
new Label {
Text = "Max Length = 10",
TextColor = Device.OnPlatform(Color.Blue, Color.Default, Color.Default)
},
maxLength,
new Label {
Text = "Max Length = 10, Only [1-9]",
TextColor = Device.OnPlatform(Color.Blue, Color.Default, Color.Default)
},
maxOnlyChars,
}
};
}
public MyMask()
{
maxLength = new MyEntry ();
maxLength.Text = "";
maxLength.Keyboard = Keyboard.Numeric;
maxLength.Text = "";
maxLength.MaxLength = 10;
entry = new MyEntry ();
entry.Text = "";
entry.Keyboard = Keyboard.Numeric;
entry.Text = "";
maskEntry = new MyEntry ();
maskEntry.Text = "";
maskEntry.Keyboard = Keyboard.Numeric;
maskEntry.Text = "";
maskEntry.FormatCharacters = "-";
maskEntry.Mask = new System.Collections.Generic.List<MaskRules> (
new[] {
new MaskRules { Start = 0, End = 3, Mask = "" },
new MaskRules { Start = 4, End = 6, Mask = "{0:3}-{3:}"},
new MaskRules { Start = 7, End = 10, Mask = "{0:3}-{3:3}-{6:}"},
new MaskRules { Start = 10, End = 20, Mask = "{0:}"}
});
defaultMask = new MyEntry ();
defaultMask.Text = "";
defaultMask.FormatCharacters = "-";
defaultMask.Keyboard = Keyboard.Numeric;
defaultMask.Text = "1234567890";
defaultMask.Mask = new System.Collections.Generic.List<MaskRules> (
new[] {
new MaskRules { Start = 0, End = 3, Mask = "" },
new MaskRules { Start = 4, End = 6, Mask = "{0:3}-{3:}"},
new MaskRules { Start = 7, End = 10, Mask = "{0:3}-{3:3}-{6:}"},
new MaskRules { Start = 10, End = 20, Mask = "{0:}"}
});
this.Content = new StackLayout {
Children = {
new Label { Text = "Normal Entry" },
entry,
new Label { Text = "Max length = 10" },
maxLength,
new Label { Text = "Mask" },
maskEntry,
new Label { Text = "Apply Mask to Text" },
defaultMask
}
};
}
static void TextUpChanged(BindableObject bindable, object oldValue, object newValue)
{
MyEntry ctrl = (MyEntry)bindable;
if (newValue != null && String.IsNullOrEmpty(newValue.ToString()) == false)
{
var txt = newValue.ToString();
ctrl.TextUpdate = "";
ctrl.LastText = "";
ctrl.SelectionStart = 0;
ctrl.BeforeChars = "";
ctrl.Text = txt;
ctrl.ApplyTextChangeMask(ctrl.Text, txt);
}
}
protected override void OnElementChanged (ElementChangedEventArgs<Entry> e)
{
base.OnElementChanged (e);
if (native == null) {
source = e.NewElement as MyEntry;
var control = (MyEntry)this.Element;
native = this.Control as UITextField;
if (source.FormatCharacters != null && String.IsNullOrEmpty (source.Text) == false) {
ApplyDefaultRule ();
}
native.ShouldChangeCharacters += TextShouldChangeCharacters;
}
}
protected override void OnElementChanged (ElementChangedEventArgs<Entry> e)
{
base.OnElementChanged (e);
if (native == null) {
source = e.NewElement as MyEntry;
native = this.Control as EntryEditText;
if (source.FormatCharacters != null && String.IsNullOrEmpty(source.Text) == false) {
ApplyDefaultRule ();
}
native.AfterTextChanged += Native_AfterTextChanged;
native.KeyPress += Native_KeyPress;
native.BeforeTextChanged += Native_BeforeTextChanged;
SetNativeControl(native);
}
}
public MyMask ()
{
entry = new MyEntry ();
entry.Text = "";
entry.Keyboard = Keyboard.Numeric;
entry.Text = "";
// maxlength text
maxLength = new MyEntry ();
maxLength.Text = "";
maxLength.Keyboard = Keyboard.Numeric;
maxLength.Text = "";
maxLength.MaxLength = 10;
// zip code mask: 19201 or 12901-2010
maskZipCode = new MyEntry ();
maskZipCode.Text = "";
maskZipCode.Keyboard = Keyboard.Numeric;
maskZipCode.Text = "";
maskZipCode.FormatCharacters = "-";
maskZipCode.Mask = new System.Collections.Generic.List<MaskRules> (
new[] {
new MaskRules { Start = 0, End = 5, Mask = "" },
new MaskRules { Start = 5, End = 9, Mask = "{0:5}-{5:}"},
});
// mask: 0-1-3
maskEntry2 = new MyEntry ();
maskEntry2.Text = "";
maskEntry2.Keyboard = Keyboard.Numeric;
maskEntry2.Text = "";
maskEntry2.FormatCharacters = "-";
maskEntry2.Mask = new System.Collections.Generic.List<MaskRules> (
new[] {
new MaskRules { Start = 0, End = 1, Mask = ""},
new MaskRules { Start = 1, End = 2, Mask = "{0:1}-{1:}"},
new MaskRules { Start = 2, End = 3, Mask = "{0:1}-{1:1}-{2:}" },
});
// mask: 01/03/2015
maskEntry3= new MyEntry ();
maskEntry3.Text = "";
maskEntry3.Keyboard = Keyboard.Text;
maskEntry3.FormatCharacters = "/";
maskEntry3.Mask = new System.Collections.Generic.List<MaskRules> (
new[] {
// 01 [characters: 0,1]
new MaskRules { Start = 0, End = 2, Mask = "{0:2}" },
// 01/03 [characters: 0,1]-[characters: 2,3]
new MaskRules { Start = 2, End = 4, Mask = "{0:2}/{2:2}"},
// 01/01/2015 [characters: 0,1]-[characters: 2,3]-characters: 4,5,6,7]
// max length: end=8
// {0:2} : take substring (0, 1): 01
// {2:2} : take substring (2, 2): 03
// {5:} : take substring (5) : 2015
new MaskRules { Start = 4, End = 8, Mask = "{0:2}/{2:2}/{4:}"}
});
// mask: 123-345-4444 or 1233454444900 (overflow mask)
defaultMask = new MyEntry ();
defaultMask.Text = "";
defaultMask.FormatCharacters = "-";
defaultMask.Keyboard = Keyboard.Numeric;
defaultMask.Text = "1234567890";
defaultMask.Mask = new System.Collections.Generic.List<MaskRules> (
new[] {
new MaskRules { Start = 0, End = 3, Mask = "" },
new MaskRules { Start = 4, End = 6, Mask = "{0:3}-{3:}"},
new MaskRules { Start = 7, End = 10, Mask = "{0:3}-{3:3}-{6:}"},
new MaskRules { Start = 10, End = 20, Mask = "{0:}"}
});
this.Content = new StackLayout {
Children = {
new Label { Text = "Normal Entry" },
entry,
new Label {
Text = "Max length = 10" ,
TextColor = Device.OnPlatform(Color.Blue, Color.Default, Color.Default)
},
maxLength,
new Label {
Text = "Zip code Mask",
TextColor = Device.OnPlatform(Color.Blue, Color.Default, Color.Default)
},
maskZipCode,
new Label {
Text = "0-1-2 Mask",
TextColor = Device.OnPlatform(Color.Blue, Color.Default, Color.Default)
},
maskEntry2,
new Label {
Text = "DOB Mask",
TextColor = Device.OnPlatform(Color.Blue, Color.Default, Color.Default)
},
maskEntry3,
new Label {
Text = "123-345-4444 or 1233454444900 (overflow mask)",
TextColor = Device.OnPlatform(Color.Blue, Color.Default, Color.Default)
},
defaultMask,
new Button
{
Text = "Mask Values (overflow)",
Command = new Command(async () => {
var text = defaultMask.Text;
var raw = defaultMask.RawText;
await DisplayAlert("Overflow Mask values",
"Text:=" + text + "\r\nRaw:=" + raw, "Cancel");
})
}
}
};
}
protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
{
base.OnElementChanged (e);
if (native == null) {
source = e.NewElement as MyEntry;
native = this.Control as EntryEditText;
// INIT defaults
rules = source.Mask;
FormatCharacters = source.FormatCharacters.ToCharArray ();
if (FormatCharacters != null && String.IsNullOrEmpty(source.Text) == false) {
ApplyDefaultRule ();
}
native.AfterTextChanged += (object sender, global::Android.Text.AfterTextChangedEventArgs e2) => {
if (pt != null && FormatCharacters != null)
{
if (pt.Start != -1) {
if (pt.End != -1) {
native.SetSelection (pt.Start, pt.End);
}
else {
if (pt.Start >= native.Text.Length) {
pt.Start = native.Text.Length;
}
else
{
var before = source.BeforeChars;
if (before == "")
{
pt.Start = 1;
}
else
{
var text = native.Text;
for (int i = 0; i < text.Length; i++)
{
string c = text[i].ToString();
if (FormatCharacters.Where(ch => ch.ToString() == c.ToString()).Count() <= 0)
{
// no placeholder1
if (before[0].ToString() == c)
{
before = before.Substring(1);
}
if (String.IsNullOrEmpty(before))
{
pt.Start = i+1;
break;
}
}
}
}
}
native.SetSelection(pt.Start);
}
}
pt = null;
}
};
native.KeyPress += (object sender, KeyEventArgs args) => {
if (args.Event.Action == global::Android.Views.KeyEventActions.Down )
{
var len = native.Text.Length;
if (args.KeyCode == global::Android.Views.Keycode.Back ||
args.KeyCode == global::Android.Views.Keycode.Del)
{
// do test cleanup
if (source.Locked == false && source.Mask != null)
{
source.Delete = true;
args.Handled = false;
}
else if(source.MaxLength > 0)
{
args.Handled = false;
}
else
{
args.Handled = false;
}
}
else if (source.Locked == false && source.Mask != null)
{
source.Delete = false;
var start = native.SelectionStart;
if (start < len)
{
var evt = args.Event;
var act = evt.Action;
var newChar = ((char)evt.UnicodeChar).ToString();
//var newChar = ((char)args.KeyCode.ConvertToString()).ToString();
native.Text = native.Text.Insert(start, newChar);
args.Handled = true;
}
else
{
args.Handled = false;
}
}
else if(source.MaxLength > 0)
{
if (len+1 > source.MaxLength)
{
args.Handled = true;
//source.Validate("MAX", "Max length is " + source.MaxLength);
}
else
{
args.Handled = false;
}
}
else
{
args.Handled = false;
}
}
};
native.BeforeTextChanged += (object sender, global::Android.Text.TextChangedEventArgs e2) => {
if (source.Locked == false && source.Mask != null)
{
source.SelectionStart = native.SelectionStart;
source.SelectionEnd = native.SelectionEnd;
source.TextLength = native.Text.Length;
}
else if(source.Mask == null)
{
source.SelectionStart = native.SelectionStart;
source.SelectionEnd = native.SelectionEnd;
source.TextLength = native.Text.Length;
}
};
SetNativeControl(native);
}
}
protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
{
base.OnElementChanged(e);
//var native = (UITextField)this.Control;
if (native == null)
{
source = e.NewElement as MyEntry;
var control = (MyEntry)this.Element;
native = this.Control as UITextField;
// INIT defaults
rules = source.Mask;
FormatCharacters = source.FormatCharacters.ToCharArray();
// Events
//if (FormatCharacters != null && String.IsNullOrEmpty(source.Text) == false) {
// ApplyDefaultRule ();
//}
SetFont(control);
SetTextAlignment(control);
SetBorder(control);
SetPlaceholderTextColor(control);
ResizeHeight();
native.ShouldChangeCharacters += new UITextFieldChange(delegate(UITextField textField, NSRange range, string replacementString)
{
native.BecomeFirstResponder();
if (source.MaxLength > 0)
{
var newlength = source.Text.Length + replacementString.Length - range.Length;
return newlength <= source.MaxLength;
}
if (source.Locked)
{
return false;
}
if (source.Locked == false && source.Mask != null)
{
source.Delete = false;
source.SelectionStart = textField.GetOffsetFromPosition(textField.BeginningOfDocument, textField.SelectedTextRange.Start);
source.SelectionEnd = textField.GetOffsetFromPosition(textField.BeginningOfDocument, textField.SelectedTextRange.End);
source.TextLength = native.Text.Length;
}
if (source.Mask != null)
{
source.Delete = false;
if (replacementString == "")
{
source.Delete = true;
}
source.SelectionStart = textField.GetOffsetFromPosition(textField.BeginningOfDocument, textField.SelectedTextRange.Start);
source.SelectionEnd = textField.GetOffsetFromPosition(textField.BeginningOfDocument, textField.SelectedTextRange.End);
source.TextLength = native.Text.Length;
}
return true;
});
//SetNativeControl(native);
}
}
private void SetTextAlignment(MyEntry view)
{
switch (view.XAlign)
{
case TextAlignment.Center:
Control.TextAlignment = UITextAlignment.Center;
break;
case TextAlignment.End:
Control.TextAlignment = UITextAlignment.Right;
break;
case TextAlignment.Start:
Control.TextAlignment = UITextAlignment.Left;
break;
}
}
void SetPlaceholderTextColor(MyEntry view)
{
/*
UIColor *color = [UIColor lightTextColor];
YOURTEXTFIELD.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"PlaceHolder Text" attributes:@{NSForegroundColorAttributeName: color}];
*/
if (string.IsNullOrEmpty(view.Placeholder) == false && view.PlaceholderTextColor != Xamarin.Forms.Color.Default)
{
NSAttributedString placeholderString = new NSAttributedString(view.Placeholder, new UIStringAttributes() { ForegroundColor = view.PlaceholderTextColor.ToUIColor() });
Control.AttributedPlaceholder = placeholderString;
}
}
private void SetFont(MyEntry view)
{
UIFont uiFont;
if (view.Font != Font.Default && (uiFont = view.Font.ToUIFont()) != null)
Control.Font = uiFont;
else if (view.Font == Font.Default)
Control.Font = UIFont.SystemFontOfSize(17f);
}
private void SetBorder(MyEntry view)
{
Control.BorderStyle = view.HasBorder ? UITextBorderStyle.RoundedRect : UITextBorderStyle.None;
}