private void UpdateLayoutFromRealtimeStack()
{
// iterate through all the positions in the icon stack and animate the blocks
// to move to their specified locations
for (int index = 0; index < IconStack_Realtime.Count; index++)
{
// there could be nothing in this position, if so then skip this index/position
IIcon icon = IconStack_Realtime[index];
if (icon == null)
{
continue;
}
// if there is an icon currently being moved then we don't want to update it
if (MouseCapturedIcon != null && index == IconStack_Realtime.IndexOf(MouseCapturedIcon))
{
continue;
}
// get a handle on the icon UIElement and where it should go for this index
UIElement iconElement = icon as UIElement;
Point iconPosition = GridCalculator.GetPosition(index);
// build a moving storyboard and start it
Storyboard sbMove = TransitionHelper.BuildTranslateTransformTransition(iconElement,
iconPosition, CommonConstants.CANVAS_ICON_MOVING_TIMING, false);
sbMove.Begin();
}
}
public void AddIcon(IIcon icon, int pos)
{
if (pos >= CellCount)
{
RowCount += 1;
for (int i = 0; i < ColumnCount; i++)
{
IconStack_Realtime.Add(null);
IconStack_LastChanged.Add(null);
IconStack_LastCommitted.Add(null);
}
this.Height += IconSize.Y;
GridCalculator.PanelHeight += IconSize.Y;
GridCalculator.RowCount = RowCount;
GridCalculator.ColumnCount = ColumnCount;
}
// TODO:: sanity check that position is within bounds
// TODO:: sanity check that IIcon is a UIElement
UIElement iconUIElement = icon as UIElement;
iconUIElement.SetValue(Canvas.ZIndexProperty, 0);
this.Children.Add(iconUIElement);
IconStack_Realtime[pos] = icon;
IconStack_LastChanged[pos] = icon;
IconStack_LastCommitted[pos] = icon;
int position = GetIconStackPosition(icon);
Point canvasPosition = GridCalculator.GetPosition(position);
UIElement iconElement = icon as UIElement;
// we do an initial render transform so that later when we animate it no exception is thrown
TransformGroup tg = TransitionHelper.GetTransformGroupForXYOffset(canvasPosition.X, canvasPosition.Y, 1.00D, 1.00D);
iconElement.RenderTransform = tg;
iconUIElement.MouseLeftButtonDown += new MouseButtonEventHandler(iconUIElement_MouseLeftButtonDown);
iconUIElement.MouseLeftButtonUp += new MouseButtonEventHandler(iconUIElement_MouseLeftButtonUp);
iconUIElement.MouseMove += new MouseEventHandler(iconUIElement_MouseMove);
iconUIElement.Drop += new DragEventHandler(iconUIElement_Drop);
}
void iconUIElement_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (!IsEditing)
{
return;
}
// TODO:: use constants for ZIndex
UIElement element = sender as UIElement;
TransformGroup tg = TransitionHelper.GetTransformGroupForXYOffset(
e.GetPosition(this).X - MouseCapturedClickPosition.X,
e.GetPosition(this).Y - MouseCapturedClickPosition.Y,
1.0D, 1.0D);
element.RenderTransform = tg;
element.Opacity = 1.00D;
element.SetValue(Canvas.ZIndexProperty, 0); // move the block back down to the common zindex
element.ReleaseMouseCapture();
Point mousePosition = e.GetPosition(this);
// get a handle on the icon the mouse is over
CellPosition cellPosition = GetCellPositionFromMousePoint(mousePosition);
// if the cell position is null then the user is out of bounds, assume the icon
// will go to the last position
if (cellPosition == null)
{
cellPosition = GridCalculator.GetCellFromCellIndex(CellCount - 1);
}
// take the Icon which was captured by the mouse
// and put it into the Icon stack at the provided position
UpdateIconStack(ref IconStack_LastChanged, MouseCapturedIcon, cellPosition);
// the icon is no longer being dragged by the mouse, so clear out the captured icon
MouseCapturedIcon = null;
// transition to this stack (and update the realtime stack)
TransitionToIconStack(IconStack_LastChanged);
}
void iconUIElement_MouseMove(object sender, MouseEventArgs e)
{
if (!IsEditing)
{
return;
}
if (MouseCapturedIcon != null)
{
// update the icon being dragged around's position
UIElement iconElement = MouseCapturedIcon as UIElement;
TransformGroup tg = TransitionHelper.GetTransformGroupForXYOffset(
e.GetPosition(this).X - MouseCapturedClickPosition.X,
e.GetPosition(this).Y - MouseCapturedClickPosition.Y,
1.2D, 1.2D);
iconElement.RenderTransform = tg;
Point mousePosition = e.GetPosition(this);
// get a handle on the icon the mouse is over
CellPosition cellPosition = GetCellPositionFromMousePoint(mousePosition);
// if the cell position is null then the user is out of bounds, assume the icon
// will go to the last position
if (cellPosition == null)
{
cellPosition = GridCalculator.GetCellFromCellIndex(CellCount - 1);
}
// take the Icon which was captured by the mouse
// and put it into the Icon stack at the provided position
UpdateIconStack(ref IconStack_Realtime, MouseCapturedIcon, cellPosition);
// transition to this stack (and update the realtime stack)
TransitionToIconStack(IconStack_Realtime);
}
}
