private async Task OnSelectCategory(IRokredListChildDataSource category)
{
SelectedChildCategory = category;
SetInternalSelectedStates();
base.AddContext(category);
(App.Current as App).NavigateTo(new CategoryView(base.DataSourceContext, category as CategoryVmi));
}
private async Task OnSelectOpinion(IRokredListChildDataSource vmi)
{
SelectedChildOpinion = vmi;
SetInternalSelectedStates();
base.AddContext(vmi);
(App.Current as App).NavigateTo(new OpinionView(base.DataSourceContext, CurrentSubject, vmi as OpinionVmi));
}
private async Task OnSelectSubject(IRokredListChildDataSource subject)
{
SelectedChildSubject = subject;
SelectedChildCategory = null;
SetInternalSelectedStates();
base.AddContext(subject);
(App.Current as App).NavigateTo(page: new SubjectView(base.DataSourceContext, subject as SubjectVmi));
}
protected void SelectedItemChanged(IRokredListChildDataSource val)
{
foreach (var child in StackChildren.Children)
{
if (child is RokredButton button)
{
if (button.Content is IRokredListChildView view)
{
view.SetIsSelected(val == view.DataSource);
}
}
}
}
protected void AddContext(IRokredListChildDataSource item)
{
if (DataSourceContext == null)
{
DataSourceContext = new DataSourceContext();
}
while (DataSourceContext.ContextItems.Count >= DataSourceContextIndex + 1)
{
DataSourceContext.ContextItems.RemoveAt(DataSourceContext.ContextItems.Count - 1);
}
DataSourceContext.ContextItems.Add(item);
}
public static string GetImageBasedOnContext(this IRokredListChildDataSource val, bool isSelected)
{
var result = string.Empty;
if (val is CategoryVmi)
{
result = isSelected ? "category-icon-selected.svg" : "category-icon.svg";
}
if (val is SubjectVmi)
{
result = isSelected ? "subject-icon-selected.svg" : "subject-icon.svg";
}
if (val is OpinionVmi)
{
result = isSelected ? "opinion-icon-selected.svg" : "opinion-icon.svg";
}
return(result);
}
public static IRokredListChildView CreateDynamicListItem(this IRokredListChildDataSource val, bool isSelected)
{
IRokredListChildView result;
if (val is CategoryVmi)
{
result = new CategoryListItem(val as CategoryVmi);
}
else if (val is SubjectVmi)
{
result = new SubjectListItem(val as SubjectVmi);
}
else if (val is OpinionVmi)
{
result = new OpinionListItem(val as OpinionVmi);
}
else
{
throw new NotImplementedException();
}
result.SetHasChevron(false);
return(result);
}
protected BaseViewModel(IRokredListChildDataSource currentContext = null)
{
_currentContext = currentContext;
Initialize();
}
public static View CreateBreadcrumbView(this IRokredListChildDataSource context, ICommand command = null)
{
//if there is no command, this is the outside most view
var mainStackLayout = new StackLayout
{
Orientation = StackOrientation.Horizontal, Spacing = 0,
HorizontalOptions = LayoutOptions.Start,
VerticalOptions = LayoutOptions.Fill
};
var insideView = new RoundedView {
CornerRadius = 5
};
// this stack contains the bordered text of the item plus the chevron
var insideStack = new StackLayout
{
Orientation = StackOrientation.Horizontal,
Spacing = 0, VerticalOptions = LayoutOptions.Center
};
var label = new RokredLabel
{
FontSize = 16, IsBold = true,
Margin = new Thickness(15, 5, 15, 5),
VerticalOptions = LayoutOptions.Center
};
var chevron = new SvgCachedImage
{
Source = "chevron-dark.svg", WidthRequest = 10, HeightRequest = 15,
Margin = new Thickness(15, 5, 0, 5)
};
if (context is CategoryVmi category)
{
insideView.BackgroundColor = Color.White;
label.TextColor = Color.Black;
label.Text = category.Name;
label.Margin = new Thickness(5, 5, 10, 5);
label.FontSize = 12;
// category has an icon
var categoryIcon = new SvgCachedImage
{
WidthRequest = 15, HeightRequest = 20, Margin = new Thickness(10, 5, 5, 5),
Source = context.GetImageBasedOnContext(false)
};
insideStack.Children.Add(categoryIcon);
}
else if (context is SubjectVmi)
{
insideView.BackgroundColor = Color.FromHex("4A44F2");
label.TextColor = Color.White;
label.Text = "S";
}
else if (context is OpinionVmi && !(context as OpinionVmi).IsDirty)
{
insideView.BackgroundColor = Color.FromHex("F2BE22");
label.TextColor = Color.Black;
label.Text = "O";
}
else if (context is OpinionVmi && (context as OpinionVmi).IsDirty)
{
chevron.IsVisible = false;
label.IsVisible = false;
insideView.BackgroundColor = Color.Transparent;
var star = new SvgCachedImage
{
Source = "star-icon.svg", WidthRequest = 35, HeightRequest = 35,
Margin = new Thickness(0, 0, 0, 0)
};
insideStack.Children.Add(star);
}
insideStack.Children.Add(label);
mainStackLayout.HorizontalOptions = LayoutOptions.Start;
mainStackLayout.VerticalOptions = LayoutOptions.Center;
mainStackLayout.Margin = new Thickness(10);
insideView.Content = insideStack;
mainStackLayout.Children.Add(insideView);
mainStackLayout.Children.Add(chevron);
if (command != null)
{
var button = new RokredButton();
button.Content = mainStackLayout;
button.Command = command;
button.CommandParameter = context;
return(button);
}
return(mainStackLayout);
}
public DynamicListItem(IRokredListChildDataSource data)
{
BoundDataSource = data;
}
protected void BoundDataSourceChanged(IRokredListChildDataSource val)
{
var view = val.CreateDynamicListItem(true);
Content = view as View;
}