private void mnuModify_Click(object sender, EventArgs e)
{
// show update panel
pnlUpdate.Show();
if (itemSelected != null)
{
// make editItem the current itemSelected
editItem = itemSelected;
// update the colour of the selected item using the colour palette
lblUpdateColour.BackColor = itemSelected.itemColor;
}
model.UpdateViews();
}
/// <summary> method: pnlView_MouseMove
/// when mouse moves it checks if mouse is down and/or over shape
/// If mouse is down and over shape, it draws border around shape and
/// sets new position for shape based on how far mouse has moved.
/// If mouse is up and over shape, draw border around shape.
/// If mouse if down and not over shape, do nothing.
/// </summary>
private void pnlView_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
// set last position to current position
lastPosition = currentPosition;
// set current position to mouse position
currentPosition = new Point(e.X, e.Y);
// calculate how far mouse has moved
int xMove = currentPosition.X - lastPosition.X;
int yMove = currentPosition.Y - lastPosition.Y;
if (!dragging) // mouse not down
{
// reset variables
itemSelected = null;
bool needsDisplay = false;
// create arrayList of items from model
ArrayList theShoppingList = model.ShoppingList;
// create array of items from array list
AnyItem[] theItems = (AnyItem[])theShoppingList.ToArray(typeof(AnyItem));
// graphics object to draw items when required
Graphics g = this.pnlView.CreateGraphics();
//loop through array checking if mouse is over item
foreach (AnyItem s in theItems)
{
// check if mouse is over shape
if (s.HitTest(new Point(e.X, e.Y)))
{
// if so make item topItem
itemSelected = s;
}
if (s.Highlight == true)
{
// item to be redrawn
needsDisplay = true;
// redraw item
s.Display(g);
s.Highlight = false;
}
}
if (itemSelected != null) // if there is a topItem
{
needsDisplay = true; // need to redisplay
itemSelected.Display(g); // redisplay topItem
itemSelected.Highlight = true;
}
if (needsDisplay)
{
// redisplay model
model.UpdateViews();
}
}
else // mouse is down
{
// reset position of selected item by value of mouse move
itemSelected.x_pos = itemSelected.x_pos + xMove;
itemSelected.y_pos = itemSelected.y_pos + yMove;
model.UpdateViews();
}
}
/// <summary>method: UpdateItem
/// update views
/// </summary>
/// <param name="anItem"></param>
public void UpdateItem(AnyItem anItem)
{
UpdateViews();
}
/// <summary>method: DeleteItem
/// delete item and update views
/// </summary>
/// <param name="anItem"></param>
public void DeleteItem(AnyItem anItem)
{
shoppingList.Remove(anItem);
UpdateViews();
}
/// <summary>method: AddShoppingList
/// add shopping list to the model and update views
/// </summary>
/// <param name="anItem"></param>
public void AddItem(AnyItem anItem)
{
shoppingList.Add(anItem);
UpdateViews();
}