/// <summary>
/// reverts the last additions
/// keep imaginary "history"-product with properties WhereTo(to the Basket or back from the basket) Quantity Name
/// well, since the controls inside of a panel are generated based on the array they should share the same indexes
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnUndo_Click(object sender, EventArgs e)
{
// keep imaginary "history"-product with properties WhereTo(to the Basket or back from the basket) Quantity Name
// well, since the controls inside of a panel are generated based on the array they should share the same indexes
if (actions.Count > 0)
{
HistoryProduct temp = this.actions.Pop();
this.ModifyControlQuantity(temp.Name, temp.Quantity);
// done adjusting
// make it objects
Product prodInBasket = this.chosenShop.getProductByName(temp.Name, this.chosenShop.Basket);
if (prodInBasket != null)
{
prodInBasket.LowerQuantityBy(temp.Quantity);
if (prodInBasket.Quantity == 0)
{
this.chosenShop.Basket.Remove(prodInBasket);
}
}
temp.ChangeStack(undoneActions);
// very bad to do - since will a lot of time, but for now - it's okay
this.UpdateBasket();
}
else
{
this.LogMessage("Nothing to undo.");
}
}
/// <summary>
/// Generally we undo the undone actions
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnRedo_Click(object sender, EventArgs e)
{
// keep imaginary "history"-product with properties WhereTo(to the Basket or back from the basket) Quantity Name
// well, since the controls inside of a panel are generated based on the array they should share the same indexes
if (undoneActions.Count > 0)
{
HistoryProduct historyProd = this.undoneActions.Pop();
int prodAndControlId = this.chosenShop.Stock.FindIndex(p => p.Name == historyProd.Name);
// managing the quantity in the display
this.ModifyControlQuantity(historyProd.Name, -(historyProd.Quantity));
// done adjusting
chosenShop.AddToBasket(new Product(historyProd));
historyProd.ChangeStack(actions);
// very bad to do - since will a lot of time, but for now - it's okay
this.UpdateBasket();
}
else
{
this.LogMessage("Nothing to redo.");
}
}