//Enable "edit" and "delete" buttons if the Selected Index is valid
private void EnableCommands(object sender, SelectionChangedEventArgs e)
{
if (SelectedIndexIsValid())
{
GuiChanges.Enable(btnEdit, btnDelete);
}
}
/// <summary>
/// Manipulation with the GUI Elements depending on selection that user made
/// </summary>
/// <returns>Selected Item Index if it's in valid range</returns>
public int GridSelected()
{
//Creating the Array of elements for simple handling of GUI,
//instead of passing to GuiChanges class Methods each one of the controls,
//pass only one array variable. Simple and Effective
UIElement[] controlsForDataGrid = { btnEdit, btnDetails, btnDelete, btnBorrow, btnQuantity };
//if user clicks in the DataGrid - check if the click Event
//Occurred in the valid range to prevent Exception
if (dataLib.SelectedIndex >= 0 && dataLib.SelectedIndex < mainLibrary.Items.Count)
{
//Enable the buttons
GuiChanges.Enable(controlsForDataGrid);
//Fine tuning the controls depending on current user Rights
ButtonsAvailable();
//Temp variable for Changing the controls text
var tmpItem = (AbstractItem)dataLib.SelectedItem;
//------------ Changing the controls Caption depending ------------//
//------------ on the current Item choosed from the Library ------------//
btnDelete.Content = $"Delete this {tmpItem.ItemType}";
btnDetails.Content = $"Details of this {tmpItem.ItemType}";
btnEdit.Content = $"Edit this {tmpItem.ItemType}";
btnQuantity.Content = $"Quantity of this {tmpItem.ItemType}";
//------------ Changing the controls Caption depending ------------//
//------------ on the current Item choosed from the Library ------------//
//Switch for Borrowing Button - depends on current Item "IsBorrowed" State
switch (tmpItem.IsBorrowed)
{
case true:
btnBorrow.Content = $"Return this {tmpItem.ItemType}";
break;
case false:
btnBorrow.Content = $"Borrow this {tmpItem.ItemType}";
break;
}
//Return Selected Item index
return(dataLib.SelectedIndex);
}
//If the Selected Index is in invalid range
else
{
//Disable the related controls
GuiChanges.Disable(controlsForDataGrid);
//Fine tuning the controls depending on current user Rights
ButtonsAvailable();
//Return the index (even tough it's invalid)
return(dataLib.SelectedIndex);
}
}
//checks the validity of input from the user and enables
//or disables the login button relatively
private void CanLogin()
{
if (!Validity.StringOK(pswPassword.Password) || !Validity.StringOK(txtUserName.Text))
{
GuiChanges.Disable(btnLogin);
}
else
{
GuiChanges.Enable(btnLogin);
}
}
//init all elements depending on current working state
private void InitEditItemWindow()
{
this.WindowStyle = WindowStyle.SingleBorderWindow;
this.ResizeMode = ResizeMode.NoResize;
this.WindowStartupLocation = WindowStartupLocation.CenterScreen;
lblISBN.TextAlignment = TextAlignment.Center;
if (!EditMode) //showing details mode
{
this.Title = "Item Details";
//Show check button for Telling to the user if the item is borrowed or not
GuiChanges.Show(chkBorrowed);
//Disable all the controls because we're in "Show Details" mode
foreach (UIElement item in this.grdWindowGrid.Children)
{
GuiChanges.Disable(item);
}
//Button caption changed to "Exit"
btnSaveExit.Content = "Exit";
//After all controls being disabled because of "Show Details" mode,
//Enable the Exit button
GuiChanges.Enable(btnSaveExit);
}
else //editing Item Mode
{
//Button caption changed to "Save Changes"
btnSaveExit.Content = "Save Changes";
//Hide "Item is Borrowed" indicator CheckBox
GuiChanges.Hide(chkBorrowed);
}
}
//Fills inner category relative to base that user chooses
//and enables the combo for Inner
private void FillInnerCombo(object sender, SelectionChangedEventArgs e)
{
GuiChanges.Enable(cmbInnerCat);
GuiChanges.FillComboWithInnerCategory(cmbInnerCat, cmbBaseCat.SelectedItem);
cmbInnerCat.SelectedIndex = 0;
}