private void DoItemMouseUp(ItemMouseEventArgs e)
{
Point loc = new Point(e.X + ControlRectangle.X, e.Location.Y + ControlRectangle.Top);
if (e.Button == MouseButtons.Left)
{
if (e.ItemBox.Item.LegendSymbolMode == SymbolModes.Checkbox)
{
if (e.ItemBox.CheckBox.Contains(loc))
{
IRenderableLegendItem rendItem = e.ItemBox.Item as IRenderableLegendItem;
if (rendItem != null)
{
// force a re-draw in the case where we are talking about layers.
rendItem.IsVisible = !rendItem.IsVisible;
}
else
{
e.ItemBox.Item.Checked = !e.ItemBox.Item.Checked;
}
if (CheckBoxMouseUp != null) CheckBoxMouseUp(this, e);
IsInitialized = false;
Invalidate();
}
}
if (e.ItemBox.Textbox.Contains(loc))
{
if (e.ItemBox == _previousMouseDown)
{
_isDragging = false;
// Edit via text box
_editBox.Left = e.ItemBox.Textbox.Left;
_editBox.Width = e.ItemBox.Textbox.Width + 10;
_editBox.Top = e.ItemBox.Bounds.Top;
_editBox.Height = e.ItemBox.Bounds.Height;
_editBox.SelectedText = e.ItemBox.Item.LegendText;
_editBox.Font = Font;
_editBox.Visible = true;
}
}
}
if (e.Button == MouseButtons.Right)
{
if (e.ItemBox.Item.ContextMenuItems == null) return;
foreach (MenuItem mi in e.ItemBox.Item.ContextMenuItems)
{
_contextMenu.MenuItems.Add(mi);
}
_contextMenu.Show(this, e.Location);
_contextMenu.MenuItems.Clear();
}
}
private void DoItemMouseDown(ItemMouseEventArgs e)
{
Point loc = new Point(e.X + ControlRectangle.X, e.Location.Y + ControlRectangle.Top);
// Toggle expansion
if (e.ItemBox.ExpandBox.Contains(loc))
{
e.ItemBox.Item.IsExpanded = !e.ItemBox.Item.IsExpanded;
if (ExpandBoxMouseDown != null) ExpandBoxMouseDown(this, e);
IsInitialized = false;
SizePage();
ResetScroll();
Invalidate();
return;
}
if (e.ItemBox.Item.IsSelected)
{
// if we are already selected, prepare to edit in textbox
_previousMouseDown = e.ItemBox;
// Start dragging
if (e.Button == MouseButtons.Left)
{
_isDragging = true;
ILegendItem li = e.ItemBox.Item;
while (li != null && li as ILayer == null)
{
li = li.GetParentItem();
}
ILayer lyr = li as ILayer;
if (lyr != null)
{
_dragItem = BoxFromItem(lyr);
}
else
{
_isDragging = false;
}
}
}
else
{
// Check for textbox clicking
if (e.ItemBox.Textbox.Contains(loc))
{
if (ModifierKeys != Keys.Shift)
{
ClearSelection();
}
e.ItemBox.Item.IsSelected = true;
//_selection.Add(e.ItemBox);
//IsInitialized = false;
//Invalidate();
//return;
}
}
}
/// <summary>
/// Fires the ItemMouseMove Event, which handles the mouse moving over one of the legend items.
/// </summary>
/// <param name="e">An ItemMouseEventArgs</param>
protected virtual void OnItemMouseMove(ItemMouseEventArgs e)
{
if (ItemMouseMove != null) ItemMouseMove(this, e);
}
private void DoItemMouseMove(ItemMouseEventArgs e)
{
OnItemMouseMove(e);
}
/// <summary>
/// The coordinates are in legend coordinates, but a LegendBox is provided to define the
/// coordinates of the specified object.
/// </summary>
/// <param name="e">An ItemMouseEventArgs</param>
protected virtual void OnItemMouseDown(ItemMouseEventArgs e)
{
if (ItemMouseDown != null) ItemMouseDown(this, e);
}
/// <summary>
/// Performs the default handling for mouse movememnt, and decides
/// whether or not to fire an ItemMouseMove event.
/// </summary>
/// <param name="e">A MouseEventArgs</param>
protected override void OnMouseMove(MouseEventArgs e)
{
if (_legendBoxes == null) return;
bool cursorHandled = false;
LegendBox currentBox = null;
Point loc = new Point(e.X + ControlRectangle.X, e.Location.Y + ControlRectangle.Top);
foreach (LegendBox box in _legendBoxes)
{
if (box.Bounds.Contains(loc))
{
currentBox = box;
ItemMouseEventArgs args = new ItemMouseEventArgs(e, box);
DoItemMouseMove(args);
}
}
if (_isDragging)
{
_dragTarget = null;
if (currentBox != null) _dragTarget = currentBox;
if (ClientRectangle.Contains(e.Location))
{
if (currentBox == null) _dragTarget = BottomBox;
}
if (_previousLine.IsEmpty == false) Invalidate(_previousLine);
_previousLine = Rectangle.Empty;
if (_dragTarget != null && _dragItem != null && _dragTarget != _dragItem)
{
LegendBox boxOverLine;
int left = 0;
LegendBox container = BoxFromItem(_dragTarget.Item.GetValidContainerFor(_dragItem.Item));
if (container != null)
{
left = (container.Indent + 1) * _indentation;
}
if (_dragTarget.Item.CanReceiveItem(_dragItem.Item))
{
boxOverLine = _dragTarget;
}
else
{
boxOverLine = BoxFromItem(_dragTarget.Item.BottomMember());
}
if (boxOverLine == null)
{
_previousLine = Rectangle.Empty;
Cursor = Cursors.No;
cursorHandled = true;
}
else
{
_previousLine = new Rectangle(left, boxOverLine.Bounds.Bottom, Width - left, 4);
Cursor = Cursors.Hand;
cursorHandled = true;
Invalidate(_previousLine);
}
}
if (cursorHandled == false)
{
Cursor = Cursors.No;
cursorHandled = true;
}
}
if (cursorHandled == false)
{
Cursor = Cursors.Arrow;
}
base.OnMouseMove(e);
}
/// <summary>
/// Checks for checkbox changes and fires the ItemMouseUp event.
/// </summary>
/// <param name="e"></param>
protected virtual void OnItemMouseUp(ItemMouseEventArgs e)
{
if (ItemMouseUp != null) ItemMouseUp(this, e);
}
/// <summary>
/// Checks the Mouse Up event to see if it occurs inside a legend item.
/// </summary>
/// <param name="e"></param>
protected override void OnMouseUp(MouseEventArgs e)
{
Point loc = new Point(e.X + ControlRectangle.X, e.Location.Y + ControlRectangle.Top);
if (!_wasDoubleClick)
{
foreach (LegendBox box in _legendBoxes)
{
if (!box.Bounds.Contains(loc)) continue;
ItemMouseEventArgs args = new ItemMouseEventArgs(e, box);
DoItemMouseUp(args);
}
}
if (_isDragging && _dragItem != null)
{
if (_dragTarget != null && _dragTarget.Item != _dragItem.Item)
{
ILegendItem potentialParent = _dragTarget.Item.GetValidContainerFor(_dragItem.Item);
if (potentialParent != null)
{
potentialParent.ParentMapFrame().SuspendEvents();
// A dragable container must be a group, and the item must be a layer.
ILayer lyr = _dragItem.Item as ILayer;
if (lyr != null)
{
IGroup grp = _dragItem.Item.GetParentItem() as IGroup;
if (grp != null) grp.Remove(lyr);
int index = _dragTarget.Item.InsertIndex(_dragItem.Item);
if (index == -1) index = 0;
grp = potentialParent as IGroup;
if (grp != null) grp.Insert(index, lyr);
}
potentialParent.ParentMapFrame().ResumeEvents();
OnOrderChanged();
}
}
Cursor = Cursors.Arrow;
_isDragging = false;
Invalidate();
}
_wasDoubleClick = false;
base.OnMouseUp(e);
}
/// <summary>
/// Handles the case where the mouse down occurs.
/// </summary>
/// <param name="e">A MouseEventArgs</param>
protected override void OnMouseDown(MouseEventArgs e)
{
HideEditBox();
if (_legendBoxes == null || _legendBoxes.Count == 0) return;
Point loc = new Point(e.X + ControlRectangle.X, e.Location.Y + ControlRectangle.Top);
foreach (LegendBox box in _legendBoxes)
{
if (box.Bounds.Contains(loc))
{
ItemMouseEventArgs args = new ItemMouseEventArgs(e, box);
DoItemMouseDown(args);
}
}
base.OnMouseDown(e);
}