/// <summary>
/// Handles the <c>Click</c> event of the scatter items button.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="RoutedEventArgs"/> instance containing the event data.</param>
private void OnScatterItemsClick(object sender, RoutedEventArgs e)
{
foreach (ProductListBoxItem item in this.listBox.Items)
{
// Randomly place the item
double left = random.NextDouble() * (this.listBox.ActualWidth - item.MinWidth);
double top = random.NextDouble() * (this.listBox.ActualHeight - item.MinHeight);
AnimatedCanvas.SetLeft(item, left);
AnimatedCanvas.SetTop(item, top);
}
}
/// <summary>
/// Handles the <c>MouseLeftButtonDown</c> event of a <see cref="ProductListBoxItem"/>control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="MouseButtonEventArgs"/> instance containing the event data.</param>
private void OnProductListBoxItemMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
// Don't start dragging if a button has the capture, since it's probably being pressed
if (!(Mouse.Captured is ButtonBase))
{
ProductListBoxItem item = (ProductListBoxItem)sender;
if (item.CaptureMouse())
{
this.dragPoint = e.GetPosition(item.Parent as Panel);
this.dragLeft = AnimatedCanvas.GetLeft(item);
this.dragTop = AnimatedCanvas.GetTop(item);
e.Handled = true;
}
}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// NON-PUBLIC PROCEDURES
/////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Creates a new <see cref="ProductListBoxItem"/> instance.
/// </summary>
/// <returns>A new <see cref="ProductListBoxItem"/> instance.</returns>
private ProductListBoxItem CreateItem()
{
bool isDock = (1 == this.ActiveIndex);
ProductListBoxItem item = new ProductListBoxItem()
{
IsDockable = isDock, IsMovable = !isDock
};
// Randomly place the item in Canvas
double left = random.NextDouble() * (this.listBox.ActualWidth - item.MinWidth);
double top = random.NextDouble() * (this.listBox.ActualHeight - item.MinHeight);
AnimatedCanvas.SetLeft(item, left);
AnimatedCanvas.SetTop(item, top);
return(item);
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// NON-PUBLIC PROCEDURES
/////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Creates a new <see cref="ProductListBoxItem"/> instance.
/// </summary>
/// <returns>A new <see cref="ProductListBoxItem"/> instance.</returns>
private ProductListBoxItem CreateItem()
{
ProductListBoxItem item = new ProductListBoxItem();
// Randomly place the item
double left = random.NextDouble() * (this.listBox.ActualWidth - item.MinWidth);
double top = random.NextDouble() * (this.listBox.ActualHeight - item.MinHeight);
AnimatedCanvas.SetLeft(item, left);
AnimatedCanvas.SetTop(item, top);
// Hook up dragging
item.AddHandler(ProductListBoxItem.MouseLeftButtonDownEvent, (MouseButtonEventHandler)this.OnProductListBoxItemMouseLeftButtonDown, true);
item.MouseMove += this.OnProductListBoxItemMouseMove;
item.MouseLeftButtonUp += this.OnProductListBoxItemMouseLeftButtonUp;
return(item);
}
/// <summary>
/// Handles the <c>MouseMove</c> event of a <see cref="ProductListBoxItem"/>control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="MouseEventArgs"/> instance containing the event data.</param>
private void OnProductListBoxItemMouseMove(object sender, MouseEventArgs e)
{
ProductListBoxItem item = (ProductListBoxItem)sender;
if (this.dragPoint != null && item.IsMouseCaptured)
{
// Get the current point and the difference with the drag point
Point currentPoint = e.GetPosition(item.Parent as Panel);
double diffX = currentPoint.X - this.dragPoint.Value.X;
double diffY = currentPoint.Y - this.dragPoint.Value.Y;
// Ensure the mouse has moved a minimum distance
if (Math.Abs(diffX) >= 3 || Math.Abs(diffY) >= 3)
{
AnimatedCanvas.SetLeft(item, this.dragLeft + diffX);
AnimatedCanvas.SetTop(item, this.dragTop + diffY);
e.Handled = true;
}
}
}
/// <summary>
/// Handles the <c>Click</c> event of the arrange items button.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="RoutedEventArgs"/> instance containing the event data.</param>
private void OnArrangeItemsClick(object sender, RoutedEventArgs e)
{
double rowHeight = 0;
double x = 0;
double y = 0;
foreach (ProductListBoxItem item in this.listBox.Items)
{
// Perform wrap-panel type layout
if (x + item.MinWidth > this.listBox.ActualWidth)
{
// Start a new row
x = 0;
y += rowHeight;
rowHeight = 0;
}
AnimatedCanvas.SetLeft(item, x);
AnimatedCanvas.SetTop(item, y);
x += item.MinWidth;
rowHeight = Math.Max(rowHeight, item.MinHeight);
}
}
