//------------------------------------------------------------------------//
//UI operation: we need to find a neat way, as to do this operation async and tie this with UI thread later on
async void dbupdateUI(scrolloptions sclopt)
{
if( null == mItemList)
mItemList = new ObservableCollection<ShopItem>();
//create the db helper class
var dbhelper = new DBHelper(DBGlobal.DatabasebFilePath, this);
//create or open shopitem database
var result = dbhelper.create_database();
if (!result)
{
Toast.MakeText(this, "Failed to open / create the database ", ToastLength.Long).Show();
return;
}
var db_list = dbhelper.query_selected_values("select * from ShopItem");
//if there were no entries then we might hv got a null, in that case, take them to add a new entry
if (db_list != null)
{
mItemList.Clear();
foreach (var shopping_item in db_list)
{
mItemList.Add(shopping_item);
}
}
if( mfiltered_list.Count > 0 )
{
mfiltered_list.Clear();
foreach(var newitem in mItemList)
{
mfiltered_list.Add(newitem);
}
}
m_adapter.NotifyDataSetChanged();
switch (sclopt)
{
case scrolloptions.scroll_to_bottom:
await Task.Delay(1000);
mListview.SmoothScrollToPosition(m_adapter.Count - 1);
break;
case scrolloptions.scroll_to_top:
await Task.Delay(1000);
mListview.SmoothScrollToPosition(0);
break;
default:
case scrolloptions.scroll_none:
break;
}
}
private void HLayot_Click(object sender, EventArgs e)
{
var layout = sender as LinearLayout;
Console.WriteLine("selected:{0}", layout.Tag);
var builder = new AlertDialog.Builder(this)
.SetTitle("Shopping Completed")
.SetMessage("Have you purchased this item already??")
.SetNegativeButton("No", (EventHandler<DialogClickEventArgs>)null)
.SetPositiveButton("Yes", (EventHandler<DialogClickEventArgs>)null);
var dialog = builder.Create();
dialog.Window.Attributes.WindowAnimations = Resource.Style.dialog_animation;
dialog.Show();
// Get the buttons.
var yesBtn = dialog.GetButton((int)DialogButtonType.Positive);
var noBtn = dialog.GetButton((int)DialogButtonType.Negative);
// Assign our handlers.
yesBtn.Click += delegate
{
//create the db helper class
var dbhelper = new DBHelper(DBGlobal.DatabasebFilePath, this);
//create or open shopitem database
var result = dbhelper.create_database();
double cost = dbhelper.delete_rows(Int32.Parse(layout.Tag.ToString()));
refreshUI();
reduce_budget((int)cost);
dialog.Dismiss();
};
noBtn.Click += delegate
{
// Dismiss dialog.
Console.WriteLine("I will dismiss now!");
refreshUI();
dialog.Dismiss();
};
}
//------------------------------------------------------------------------//
//bundled all the delete options together
private void delete_item(deleteoptions dopt,int ID)
{
string represent_items = "";
List<int> ids_to_delete = new List<int>();
try
{
switch (dopt)
{
case deleteoptions.delete_this_item:
represent_items = " this item ";
ids_to_delete.Add(ID);
break;
case deleteoptions.delete_selected_items:
represent_items = " those selected items ";
if (0 == m_queue_for_deletion.Count)
{
Toast.MakeText(this, "No items were selected", ToastLength.Long).Show();
return;
}
foreach(var kvc in m_queue_for_deletion)
{
if( kvc.Value == true)
ids_to_delete.Add(kvc.Key);
}
break;
case deleteoptions.delete_all_items:
represent_items = " all your items ";
if (0 == mItemList.Count)
{
Toast.MakeText(this, "No items are present", ToastLength.Long).Show();
return;
}
foreach (var i in mItemList)
ids_to_delete.Add(i.ID);
break;
default:
break;
}
m_queue_for_deletion.Clear();
var builder = new AlertDialog.Builder(this)
.SetTitle("Action Required")
.SetMessage("Do you want to remove" + represent_items + "from the list?")
.SetNegativeButton("No", (EventHandler<DialogClickEventArgs>)null)
.SetPositiveButton("Yes", (EventHandler<DialogClickEventArgs>)null);
var dialog = builder.Create();
dialog.Window.Attributes.WindowAnimations = Resource.Style.dialog_animation;
dialog.Show();
// Get the buttons.
var yesBtn = dialog.GetButton((int)DialogButtonType.Positive);
var noBtn = dialog.GetButton((int)DialogButtonType.Negative);
// Assign our handlers.
yesBtn.Click += delegate
{
//create the db helper class
var dbhelper = new DBHelper(DBGlobal.DatabasebFilePath, this);
//create or open shopitem database
var result = dbhelper.create_database();
if (!result)
{
Toast.MakeText(this, "Failed to open / create the database ", ToastLength.Long).Show();
return;
}
foreach (var item_id in ids_to_delete)
{
dbhelper.delete_rows(item_id);
}
dbupdateUI(scrolloptions.scroll_to_top);
dialog.Dismiss();
};
noBtn.Click += delegate
{
// Dismiss dialog.
Console.WriteLine("I will dismiss now!");
m_adapter.NotifyDataSetChanged();
dialog.Dismiss();
};
}
catch(Exception ex)
{
Console.WriteLine("ExceptioHandled:{0}" + ex.Message);
}
}
private List<ShopItem> get_all_shopitems()
{
List<ShopItem> shop_items = new List<ShopItem>();
//create the db helper class
var dbhelper = new DBHelper(DBGlobal.DatabasebFilePath,this);
//create or open shopitem database
var result = dbhelper.create_database();
var db_list = dbhelper.query_selected_values("select * from ShopItem");
//if there were no entries then we might hv got a null, in that case, take them to add a new entry
if (db_list != null)
{
shop_items.Clear();
foreach (var shopping_item in db_list)
{
shop_items.Add(shopping_item);
}
}
return shop_items;
}