private void UpdateSelectedSegmentLayout(SegmentControlItem item)
{
// Get old item
var oldItem = ItemsSource.FirstOrDefault(x => x.IsSelected);
var selectedIndex = ItemsSource.IndexOf(item);
var unselectIndex = oldItem == null ? -1 : ItemsSource.IndexOf(oldItem);
if (unselectIndex != -1)
{
oldItem.IsSelected = false;
SegmentItems.Children.RemoveAt(unselectIndex);
SegmentItems.Children.Insert(unselectIndex, GetView(oldItem, unselectIndex));
}
item.IsSelected = true;
SegmentItems.Children.RemoveAt(selectedIndex);
SegmentItems.Children.Insert(selectedIndex, GetView(item, selectedIndex));
Device.BeginInvokeOnMainThread(() =>
{
this.MainContent = item.Content;
});
}
private void UpdateSelectedSegmentLayout(SegmentControlItem item)
{
// Unmark old value
var oldItem = ItemsSource.FirstOrDefault(x => x.IsSelected);
if (oldItem != null)
{
oldItem.IsSelected = false;
Grid oldSelectedView = (Grid)segmentControlItems.Children.FirstOrDefault(x => (x as Grid)?.Children?.Any(c => (c as Label)?.Text == oldItem.Text) == true);
if (oldSelectedView != null)
{
if (UserBorder)
{
oldSelectedView.Children[0].BackgroundColor = SegmentBackgroundColor;
(oldSelectedView.Children[1] as Label).TextColor = SegmentTextColor;
}
else
{
(oldSelectedView.Children[0] as BoxView).Color = Color.Transparent;
(oldSelectedView.Children[1] as Label).TextColor = SegmentTextColor;
}
}
}
// Mark new value
item.IsSelected = true;
Grid newSelectedView = (Grid)segmentControlItems.Children.FirstOrDefault(x => (x as Grid)?.Children?.Any(c => (c as Label)?.Text == item.Text) == true);
if (newSelectedView != null)
{
if (UserBorder)
{
newSelectedView.Children[0].BackgroundColor = SelectedBackgroundColor;
(newSelectedView.Children[1] as Label).TextColor = SelectedTextColor;
}
else
{
(newSelectedView.Children[0] as BoxView).Color = SelectedBackgroundColor;
(newSelectedView.Children[1] as Label).TextColor = SelectedTextColor;
}
}
Device.BeginInvokeOnMainThread(async() =>
{
await MainContent.FadeTo(0, length: 150);
this.MainContent = item.Content;
await MainContent.FadeTo(1, length: 150);
});
}
private View GetView(SegmentControlItem item, int index)
{
// Get view
View view;
if (SectionTemplate != null && SelectedSectionTemplate != null)
{
view = item.IsSelected ? SelectedSectionTemplate.CreateContent() as View : SectionTemplate.CreateContent() as View;
}
else
{
if (SelectedSectionBackground == Color.Transparent)
{
view = new StackLayout
{
Padding = SectionPadding,
Children =
{
new Label
{
FontSize = Device.GetNamedSize(FontSize, typeof(Label)),
FontFamily = App.Current.Get <string>("OpenSansSemiBold"),
Opacity = item.IsSelected ? 1 : 0.8,
Text = item.Text,
HorizontalOptions = SectionTextHorizontalLayout,
TextColor = item.IsSelected ? SelectedSectionTextColor : SectionTextColor
},
new BoxView
{
Color = item.IsSelected ? SelectedSectionTextColor : Color.Transparent,
HeightRequest = 3,
HorizontalOptions = LayoutOptions.FillAndExpand,
}
}
};
}
else
{
var stackLayout = new StackLayout
{
Orientation = item.ItemOrientation,
Padding = SectionPadding,
HorizontalOptions = LayoutOptions.FillAndExpand,
Spacing = item.Spacing,
BackgroundColor = item.IsSelected ? SelectedSectionBackground : SectionBackground
};
if (!string.IsNullOrEmpty(item.IconSource))
{
stackLayout.Children.Add(new Label
{
Text = item.IconSource,
VerticalOptions = LayoutOptions.Center,
FontFamily = item.IconFontFamily,
TextColor = item.IsSelected ? SelectedSectionTextColor : SectionTextColor,
FontSize = Device.GetNamedSize(FontSize, typeof(Label)),
InputTransparent = true
});
}
if (!string.IsNullOrEmpty(item.Text))
{
stackLayout.Children.Add(new Label
{
VerticalOptions = LayoutOptions.Center,
HorizontalOptions = SectionTextHorizontalLayout,
HorizontalTextAlignment = TextAlignment.Center,
FontSize = Device.GetNamedSize(FontSize, typeof(Label)),
FontFamily = App.Current.Get <string>("OpenSansSemiBold"),
Text = item.Text,
Margin = SectionControlMargin,
InputTransparent = true,
TextColor = item.IsSelected ? SelectedSectionTextColor : SectionTextColor
});
}
view = stackLayout;
}
}
view.BindingContext = item;
// Adding tap gesture
view.GestureRecognizers.Add(new TapGestureRecognizer()
{
Command = TapGestureCommand,
CommandParameter = item
});
if (SectionOrientation == StackOrientation.Horizontal)
{
Grid.SetColumn(view, index);
}
else
{
Grid.SetRow(view, index);
}
return(view);
}
private View GetView(SegmentControlItem item)
{
// Check if item should be selected
var isSelected =
item.IsSelected ||
(SelectedTag != null && SelectedTag?.ToString() == item.Tag?.ToString());
Grid view = new Grid()
{
Padding = new Thickness(1)
};
if (UserBorder)
{
view.Children.Add(new BoxView
{
BackgroundColor = isSelected ? SelectedBackgroundColor : SegmentBackgroundColor
});
}
var label = new Label
{
Text = item.Text,
VerticalOptions = LayoutOptions.Center,
HorizontalOptions = TextAlignment,
FontSize = Device.GetNamedSize(FontSize, typeof(Label)),
TextColor = isSelected ? SelectedTextColor : SegmentTextColor,
Margin = TextMargin,
InputTransparent = true
};
if (!UserBorder)
{
view.RowDefinitions.Add(new RowDefinition()
{
Height = GridLength.Auto
});
view.RowDefinitions.Add(new RowDefinition()
{
Height = GridLength.Auto
});
BoxView boxView = new BoxView
{
HeightRequest = 4,
BackgroundColor = Color.Transparent,
HorizontalOptions = LayoutOptions.Fill,
Color = isSelected ? SelectedBackgroundColor : Color.Transparent
};
Grid.SetRow(boxView, 1);
Grid.SetRow(label, 0);
view.Children.Add(boxView);
}
view.Children.Add(label);
item.IsSelected = isSelected;
if (item.IsSelected)
{
this.MainContent = item.Content;
}
view.GestureRecognizers.Add(new TapGestureRecognizer()
{
Command = TapGestureCommand,
CommandParameter = item
});
return(view);
}
