void HScrollViewTouch(object sender, TouchEventArgs e)
{
try{
e.Handled = false;
switch (e.Event.Action)
{
case MotionEventActions.Move:
_deltaXResetTimer.Stop();
_deltaX = _scrollView.ScrollX - _prevScrollX;
_prevScrollX = _scrollView.ScrollX;
UpdateSelectedIndex();
_deltaXResetTimer.Start();
break;
case MotionEventActions.Down:
_motionDown = true;
_scrollStopTimer.Stop();
break;
case MotionEventActions.Up:
_motionDown = false;
SnapScroll();
_scrollStopTimer.Start();
break;
}
}
catch (System.Exception ex)
{
Insights.Send("HScrollViewTouch", ex);
}
}
void UpdateUi(cxLabel view, TextView control)
{
try{
if (!string.IsNullOrEmpty(view.FontFamily))
{
string filename = view.FontFamily;
if (filename.LastIndexOf(".", System.StringComparison.Ordinal) != filename.Length - 4)
{
filename = string.Format("{0}.ttf", filename);
}
control.Typeface = TrySetFont(filename);
}
if (view.FontSize > 0)
{
control.TextSize = (float)view.FontSize;
}
}
catch (System.Exception ex)
{
Insights.Send("UpdateUi", ex);
}
}
private void UpdateUi(cxLabel view)
{
try{
if (view.FontSize > 0)
{
this.Control.Font = UIFont.FromName(this.Control.Font.Name, (float)view.FontSize);
}
if (!string.IsNullOrEmpty(view.FontFamily))
{
var fontName = Path.GetFileNameWithoutExtension(view.FontFamily);
var font = UIFont.FromName(fontName, this.Control.Font.PointSize);
if (font != null)
{
this.Control.Font = font;
}
}
this.Control.AttributedText = new NSMutableAttributedString(view.Text, this.Control.Font);
}
catch (System.Exception ex)
{
Insights.Send("UpdateUi", ex);
}
}
protected override void OnElementChanged(VisualElementChangedEventArgs e)
{
try{
base.OnElementChanged(e);
if (e.NewElement == null)
{
return;
}
_deltaXResetTimer = new Timer(100)
{
AutoReset = false
};
_deltaXResetTimer.Elapsed += (object sender, ElapsedEventArgs args) => _deltaX = 0;
_scrollStopTimer = new Timer(200)
{
AutoReset = false
};
_scrollStopTimer.Elapsed += (object sender, ElapsedEventArgs args2) => UpdateSelectedIndex();
e.NewElement.PropertyChanged += ElementPropertyChanged;
}
catch (System.Exception ex)
{
Insights.Send("OnElementChanged", ex);
}
}
private void SetMaxLength(cxEntry view)
{
try{
Control.SetFilters(new IInputFilter[] { new global::Android.Text.InputFilterLengthFilter(view.MaxLength) });
}
catch (System.Exception ex)
{
Insights.Send("SetMaxLength", ex);
}
}
private void SetBorder(cxPicker view)
{
try{
this.Control.BorderStyle = view.HasBorder ? UITextBorderStyle.RoundedRect : UITextBorderStyle.None;
}
catch (System.Exception ex)
{
Insights.Send("SetBorder", ex);
}
}
void CollectionViewItemClick(object sender, AdapterView.ItemClickEventArgs e)
{
try{
var item = this.Element.ItemsSource.Cast <object>().ElementAt(e.Position);
this.Element.InvokeItemSelectedEvent(this, item);
}
catch (System.Exception ex)
{
Insights.Send("CollectionViewItemClick", ex);
}
}
void NativeScrolled(object sender, EventArgs e)
{
try
{
var center = _native.ContentOffset.X + (_native.Bounds.Width / 2);
((cxCarouselView)Element).SelectedIndex = ((int)center) / ((int)_native.Bounds.Width);
}
catch (System.Exception ex)
{
Insights.Send("NativeScrolled", ex);
}
}
public cxCarouselViewRenderer()
{
try
{
PagingEnabled = true;
ShowsHorizontalScrollIndicator = false;
}
catch (System.Exception ex)
{
Insights.Send("cxCarouselViewRenderer", ex);
}
}
public override void Draw(CoreGraphics.CGRect rect)
{
try
{
base.Draw(rect);
ScrollToSelection(false);
}
catch (System.Exception ex)
{
Insights.Send("Draw", ex);
}
}
void UpdateSelectedIndex()
{
try{
var center = _scrollView.ScrollX + (_scrollView.Width / 2);
var cxCarouselView = (cxCarouselView)this.Element;
cxCarouselView.SelectedIndex = (center / _scrollView.Width);
}
catch (System.Exception ex)
{
Insights.Send("UpdateSelectedIndex", ex);
}
}
protected override void OnConfigurationChanged(Configuration newConfig)
{
try{
base.OnConfigurationChanged(newConfig);
if (newConfig.Orientation != _orientation)
{
OnElementChanged(new ElementChangedEventArgs <cxGridView>(this.Element, this.Element));
}
}
catch (System.Exception ex)
{
Insights.Send("OnConfigurationChanged", ex);
}
}
void UpdateUi(cxEntry view)
{
try{
if (!string.IsNullOrEmpty(view.FontFamily))
{
string filename = view.FontFamily;
if (filename.LastIndexOf(".", System.StringComparison.Ordinal) != filename.Length - 4)
{
filename = string.Format("{0}.ttf", filename);
}
Control.Typeface = TrySetFont(filename);
}
if (view.FontSize > 0)
{
Control.TextSize = (float)view.FontSize;
}
if (view.PlaceholderTextColor != Xamarin.Forms.Color.Default)
{
Control.SetHintTextColor(view.PlaceholderTextColor.ToAndroid());
}
if (view.HasBorder != false)
{
//return;
}
switch (view.Alignment)
{
case Xamarin.Forms.TextAlignment.Center:
Control.Gravity = GravityFlags.CenterHorizontal;
break;
case Xamarin.Forms.TextAlignment.End:
Control.Gravity = GravityFlags.End;
break;
case Xamarin.Forms.TextAlignment.Start:
Control.Gravity = GravityFlags.Start;
break;
}
}
catch (System.Exception ex)
{
Insights.Send("UpdateUi", ex);
}
}
void ElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
try
{
if (e.PropertyName == cxCarouselView.SelectedIndexProperty.PropertyName && !Dragging)
{
ScrollToSelection(false);
}
}
catch (System.Exception ex)
{
Insights.Send("ElementPropertyChanged", ex);
}
}
private void SetMaxLength(cxEntry view)
{
try{
this.Control.ShouldChangeCharacters = (textField, range, replacementString) =>
{
var newLength = textField.Text.Length + replacementString.Length - range.Length;
return(newLength <= view.MaxLength);
};
}
catch (System.Exception ex)
{
Insights.Send("SetMaxLength", ex);
}
}
protected override void OnSizeChanged(int w, int h, int oldw, int oldh)
{
try{
if (_initialized && (w != oldw))
{
_initialized = false;
}
base.OnSizeChanged(w, h, oldw, oldh);
}
catch (System.Exception ex)
{
Insights.Send("OnSizeChanged", ex);
}
}
void ScrollToIndex(int targetIndex)
{
try{
var targetX = targetIndex * _scrollView.Width;
_scrollView.Post(new Runnable(() =>
{
_scrollView.SmoothScrollTo(targetX, 0);
}));
}
catch (System.Exception ex)
{
Insights.Send("ScrollToIndex", ex);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.DatePicker> e)
{
try{
base.OnElementChanged(e);
var view = e.NewElement as cxDatePicker;
SetView(view);
}
catch (System.Exception ex)
{
Insights.Send("OnElementChanged", ex);
}
}
private void UpdateUi(cxEntry view)
{
try{
if (view.FontSize > 0)
{
this.Control.Font = UIFont.FromName(this.Control.Font.Name, (float)view.FontSize);
}
if (!string.IsNullOrEmpty(view.FontFamily))
{
var fontName = Path.GetFileNameWithoutExtension(view.FontFamily);
var font = UIFont.FromName(fontName, this.Control.Font.PointSize);
if (font != null)
{
this.Control.Font = font;
}
}
if (string.IsNullOrEmpty(view.Placeholder) == false && view.PlaceholderTextColor != Color.Default)
{
NSAttributedString placeholderString = new NSAttributedString(view.Placeholder, new UIStringAttributes()
{
ForegroundColor = view.PlaceholderTextColor.ToUIColor()
});
this.Control.AttributedPlaceholder = placeholderString;
}
switch (view.Alignment)
{
case TextAlignment.Center:
Control.TextAlignment = UITextAlignment.Center;
break;
case TextAlignment.End:
Control.TextAlignment = UITextAlignment.Right;
break;
case TextAlignment.Start:
Control.TextAlignment = UITextAlignment.Left;
break;
}
}
catch (System.Exception ex)
{
Insights.Send("UpdateUi", ex);
}
}
private void ElementPropertyChanging(object sender, PropertyChangingEventArgs e)
{
try{
if (e.PropertyName == "ItemsSource")
{
if (this.Element.ItemsSource is INotifyCollectionChanged)
{
(this.Element.ItemsSource as INotifyCollectionChanged).CollectionChanged += DataCollectionChanged;
}
}
}
catch (System.Exception ex)
{
Insights.Send("ElementPropertyChanging", ex);
}
}
public override void Draw(Canvas canvas)
{
try{
base.Draw(canvas);
if (_initialized)
{
return;
}
_initialized = true;
var cxCarouselView = (cxCarouselView)this.Element;
_scrollView.ScrollTo(cxCarouselView.SelectedIndex * Width, 0);
}
catch (System.Exception ex)
{
Insights.Send("Draw", ex);
}
}
void SnapScroll()
{
try{
var roughIndex = (float)_scrollView.ScrollX / _scrollView.Width;
var targetIndex =
_deltaX < 0 ? Java.Lang.Math.Floor(roughIndex)
: _deltaX > 0 ? Java.Lang.Math.Ceil(roughIndex)
: Java.Lang.Math.Round(roughIndex);
ScrollToIndex((int)targetIndex);
}
catch (System.Exception ex)
{
Insights.Send("SnapScroll", ex);
}
}
public global::Android.Views.View GetCell(int position, global::Android.Views.View convertView, ViewGroup parent)
{
try{
var item = this.Element.ItemsSource.Cast <object>().ElementAt(position);
var viewCellBinded = (Element.ItemTemplate.CreateContent() as ViewCell);
viewCellBinded.BindingContext = item;
var view = RendererFactory.GetRenderer(viewCellBinded.View);
view.ViewGroup.LayoutParameters = new Android.Widget.GridView.LayoutParams(Convert.ToInt32(this.Element.ItemWidth), Convert.ToInt32(this.Element.ItemHeight));
view.ViewGroup.SetBackgroundColor(global::Android.Graphics.Color.LightGray);
return(view.ViewGroup);
}
catch (System.Exception ex)
{
Insights.Send("SetMaxLength", ex);
return(null);
}
}
private void UpdateUi(cxDatePicker view)
{
try{
if (view.FontSize > 0)
{
this.Control.Font = UIFont.FromName(this.Control.Font.Name, (float)view.FontSize);
}
if (!string.IsNullOrEmpty(view.FontFamily))
{
var fontName = Path.GetFileNameWithoutExtension(view.FontFamily);
var font = UIFont.FromName(fontName, this.Control.Font.PointSize);
if (font != null)
{
this.Control.Font = font;
}
}
if (view.TextColor != Xamarin.Forms.Color.Default)
{
Control.TextColor = view.TextColor.ToUIColor();
}
switch (view.Alignment)
{
case TextAlignment.Center:
Control.TextAlignment = UITextAlignment.Center;
break;
case TextAlignment.End:
Control.TextAlignment = UITextAlignment.Right;
break;
case TextAlignment.Start:
Control.TextAlignment = UITextAlignment.Left;
break;
}
}
catch (System.Exception ex)
{
Insights.Send("UpdateUi", ex);
}
}
private void Unbind(cxGridView oldElement)
{
try{
if (oldElement != null)
{
oldElement.PropertyChanging += ElementPropertyChanging;
oldElement.PropertyChanged -= ElementPropertyChanged;
if (oldElement.ItemsSource is INotifyCollectionChanged)
{
(oldElement.ItemsSource as INotifyCollectionChanged).CollectionChanged -= DataCollectionChanged;
}
}
}
catch (System.Exception ex)
{
Insights.Send("Unbind", ex);
}
}
private void Bind(cxGridView newElement)
{
try{
if (newElement != null)
{
newElement.PropertyChanging += ElementPropertyChanging;
newElement.PropertyChanged += ElementPropertyChanged;
if (newElement.ItemsSource is INotifyCollectionChanged)
{
(newElement.ItemsSource as INotifyCollectionChanged).CollectionChanged += DataCollectionChanged;
}
}
}
catch (System.Exception ex)
{
Insights.Send("Bind", ex);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Label> e)
{
try{
base.OnElementChanged(e);
var view = e.NewElement as cxLabel;
//UpdateUi(view, this.Control);
if (view != null)
{
SetView(view);
}
}
catch (System.Exception ex)
{
Insights.Send("OnElementChanged", ex);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <cxGridView> e)
{
try{
base.OnElementChanged(e);
var collectionView = new Android.Widget.GridView(Xamarin.Forms.Forms.Context);
collectionView.SetGravity(GravityFlags.Center);
collectionView.SetColumnWidth(Convert.ToInt32(Element.ItemWidth));
collectionView.StretchMode = StretchMode.StretchColumnWidth;
var metrics = Resources.DisplayMetrics;
var spacing = (int)e.NewElement.ColumnSpacing;
var width = metrics.WidthPixels;
var itemWidth = (int)e.NewElement.ItemWidth;
int noOfColumns = width / (itemWidth + spacing);
// If possible add another row without spacing (because the number of columns will be one less than the number of spacings)
if (width - (noOfColumns * (itemWidth + spacing)) >= itemWidth)
{
noOfColumns++;
}
collectionView.SetNumColumns(noOfColumns);
collectionView.SetPadding(Convert.ToInt32(Element.Padding.Left), Convert.ToInt32(Element.Padding.Top), Convert.ToInt32(Element.Padding.Right), Convert.ToInt32(Element.Padding.Bottom));
collectionView.SetBackgroundColor(Element.BackgroundColor.ToAndroid());
collectionView.SetHorizontalSpacing(Convert.ToInt32(Element.RowSpacing));
collectionView.SetVerticalSpacing(Convert.ToInt32(Element.ColumnSpacing));
this.Unbind(e.OldElement);
this.Bind(e.NewElement);
collectionView.Adapter = this.DataSource;
collectionView.ItemClick += CollectionViewItemClick;
base.SetNativeControl(collectionView);
}
catch (System.Exception ex)
{
Insights.Send("OnElementChanged", ex);
}
}
protected override void OnElementPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
try{
base.OnElementPropertyChanged(sender, e);
var view = Element as cxLabel;
if (view != null &&
e.PropertyName == cxLabel.FontFamilyProperty.PropertyName ||
e.PropertyName == cxLabel.FontSizeProperty.PropertyName)
{
SetView(view);
}
}
catch (System.Exception ex)
{
Insights.Send("OnElementPropertyChanged", ex);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <Xamarin.Forms.DatePicker> e)
{
try{
base.OnElementChanged(e);
if (this.Control == null)
{
return;
}
Control.SetBackgroundColor(global::Android.Graphics.Color.Transparent);
var view = (cxDatePicker)Element;
UpdateUi(view);
}
catch (System.Exception ex)
{
Insights.Send("OnElementChanged", ex);
}
}