public void InitControl()
{
foreach (var star in StarList)
{
var behavior = (StarBehavior)star.Behaviors[0];
behavior.PropertyChanged -= RatingchangedEvent;
star.Behaviors.Remove(behavior);
Children.Remove(star);
}
for (int x = 0; x < this.Count; x++)
{
var behavior = new StarBehavior()
{
GroupName = "starGrouping"
};
behavior.Index = (x + 1);
var gd = new Grid();
var unSelectedImg = new Image();
unSelectedImg.SetBinding(Image.SourceProperty, new Binding(source: this, path: "UnSelectedImage"));
var selectedImg = new Image();
selectedImg.SetBinding(Image.SourceProperty, new Binding(source: this, path: "SelectedImage"));
selectedImg.SetBinding(Image.IsVisibleProperty, new Binding(source: behavior, path: "IsStarred"));
gd.Children.Add(unSelectedImg, 0, 0);
gd.Children.Add(selectedImg, 0, 0);
if (x == (Count - 1))
{
behavior.PropertyChanged += RatingchangedEvent;
}
gd.Behaviors.Add(behavior);
Children.Add(gd);
}
}
static void OnGroupNameChanged(BindableObject bindable, object oldValue, object newValue)
{
StarBehavior behavior = (StarBehavior)bindable;
string oldGroupName = (string)oldValue;
string newGroupName = (string)newValue;
// Remove existing behavior from Group
if (String.IsNullOrEmpty(oldGroupName))
{
defaultBehaviors.Remove(behavior);
}
else
{
List <StarBehavior> behaviors = starGroups[oldGroupName];
behaviors.Remove(behavior);
if (behaviors.Count == 0)
{
starGroups.Remove(oldGroupName);
}
}
// Add New Behavior to the group
if (String.IsNullOrEmpty(newGroupName))
{
defaultBehaviors.Add(behavior);
}
else
{
List <StarBehavior> behaviors = null;
if (starGroups.ContainsKey(newGroupName))
{
behaviors = starGroups[newGroupName];
}
else
{
behaviors = new List <StarBehavior>();
starGroups.Add(newGroupName, behaviors);
}
behaviors.Add(behavior);
}
}
static void OnIsStarredChanged(BindableObject bindable, object oldValue, object newValue)
{
StarBehavior behavior = (StarBehavior)bindable;
if ((bool)newValue)
{
string groupName = behavior.GroupName;
List <StarBehavior> behaviors = null;
if (string.IsNullOrEmpty(groupName))
{
behaviors = defaultBehaviors;
}
else
{
behaviors = starGroups[groupName];
}
bool itemReached = false;
foreach (var item in behaviors)
{
if (item != behavior && !itemReached)
{
item.IsStarred = true;
}
if (item == behavior)
{
itemReached = true;
item.IsStarred = true;
}
if (item != behavior && itemReached)
{
item.IsStarred = false;
}
item.Rating = behavior.Index;
}
}
}