/// <summary>
/// Creates a new instance of an ItemMouseEventArgs
/// </summary>
/// <param name="inButton">The Mouse Buttons</param>
/// <param name="inClicks">The number of clicks</param>
/// <param name="inX">The X coordinate</param>
/// <param name="inY">The Y coordinate</param>
/// <param name="inDelta">The delta of the mouse wheel</param>
/// <param name="inItemBox">A LegendBox for comparision</param>
public ItemMouseEventArgs(MouseButtons inButton, int inClicks, int inX, int inY, int inDelta, LegendBox inItemBox)
: base(inButton, inClicks, inX, inY, inDelta)
{
_box = inItemBox;
}
/// <summary>
/// Creates a new instance of ItemMouseEventArgs from an existing MouseEventArgs.
/// </summary>
/// <param name="args">The existing arguments</param>
/// <param name="inItemBox">A LegendBox for comparison</param>
public ItemMouseEventArgs(MouseEventArgs args, LegendBox inItemBox)
: base(args.Button, args.Clicks, args.X, args.Y, args.Delta)
{
_box = inItemBox;
}
// Draw the symbol for a particualr item
private void DrawSymbol(Graphics g, ref PointF topLeft, LegendBox itemBox)
{
ILegendItem item = itemBox.Item;
// Align symbols so that their right side is about 20 pixels left
// of the top-left X, but allow up to 128x128 sized symbols
Size s = item.GetLegendSymbolSize();
int h = s.Height;
if (h < 1) h = 1;
if (h > 128) h = 128;
int w = s.Width;
if (w < 1) w = 1;
if (w > 128) w = 128;
int tH = ItemHeight;
int x = (int)topLeft.X + tH - w;
int y = (int)topLeft.Y;
if (tH > h) y += (tH - h) / 2;
Rectangle box = new Rectangle(x, y, w, h);
itemBox.SymbolBox = box;
item.LegendSymbol_Painted(g, box);
topLeft.X += tH + 6;
}
// Draw the plus or minus visible for controlling expansion
private void DrawPlusMinus(Graphics g, ref PointF topLeft, LegendBox itemBox)
{
ILegendItem item = itemBox.Item;
if (item == null) return;
if (item.LegendSymbolMode == SymbolMode.Symbol) return; // don't allow symbols to expand
Point tl = new Point((int)topLeft.X, (int)topLeft.Y);
tl.Y += (ItemHeight - 8) / 2;
tl.X += 3;
Rectangle box = new Rectangle(tl.X, tl.Y, 8, 8);
itemBox.ExpandBox = box;
Point center = new Point(tl.X + 4, (int)topLeft.Y + ItemHeight / 2);
g.FillRectangle(Brushes.White, box);
g.DrawRectangle(Pens.Gray, box);
if (item.IsExpanded)
{
g.DrawRectangle(Pens.Gray, box);
}
else if (item.LegendItems != null && item.LegendItems.Any())
{
g.DrawLine(Pens.Black, center.X, center.Y - 2, center.X, center.Y + 2);
}
g.DrawLine(Pens.Black, center.X - 2, center.Y, center.X + 2, center.Y);
topLeft.X += 13;
}
/// <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);
}
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;
}
}
}
private void HideEditBox()
{
if (_editBox.Visible && _ignoreHide == false)
{
_ignoreHide = true;
_previousMouseDown.Item.LegendText = _editBox.Text;
_previousMouseDown = null;
_editBox.Visible = false;
_editBox.Text = string.Empty;
_ignoreHide = false;
IsInitialized = false;
Invalidate();
}
}
/// <summary>
///
/// </summary>
/// <param name="e"></param>
protected virtual PointF OnInitializeItem(DrawLegendItemArgs e)
{
if (e.Item.LegendItemVisible == false) return e.TopLeft;
PointF topLeft = e.TopLeft;
PointF tempTopLeft = topLeft;
if (topLeft.Y > ControlRectangle.Bottom)
{
return topLeft; // drawing would be below the screen
}
if (topLeft.Y > ControlRectangle.Top - ItemHeight)
{
// Draw the item itself
// Point tl = new Point((int)topLeft.X, (int)topLeft.Y);
LegendBox itemBox = new LegendBox();
_legendBoxes.Add(itemBox);
itemBox.Item = e.Item;
itemBox.Bounds = new Rectangle(0, (int)topLeft.Y, Width, ItemHeight);
itemBox.Indent = (int)topLeft.X / _indentation;
DrawPlusMinus(e.Graphics, ref tempTopLeft, itemBox);
int ih = ItemHeight;
if (e.Item.LegendSymbolMode == SymbolMode.Symbol)
{
Size s = e.Item.GetLegendSymbolSize();
if (s.Height > ih) tempTopLeft.Y += 3;
}
if (e.Item.LegendSymbolMode == SymbolMode.Symbol || e.Item.LegendSymbolMode == SymbolMode.GroupSymbol)
{
DrawSymbol(e.Graphics, ref tempTopLeft, itemBox);
}
if (e.Item.LegendSymbolMode == SymbolMode.Checkbox)
{
DrawCheckBoxes(e.Graphics, ref tempTopLeft, itemBox);
}
int width = (int)e.Graphics.MeasureString(e.Item.LegendText, Font).Width;
int dY = 0;
if (e.Item.LegendSymbolMode == SymbolMode.Symbol)
{
Size s = e.Item.GetLegendSymbolSize();
if (s.Height > ih) dY = (s.Height - ih) / 2;
tempTopLeft.Y += dY;
}
tempTopLeft.Y += (ih - Font.Height) / (float)2;
itemBox.Textbox = new Rectangle((int)tempTopLeft.X, (int)topLeft.Y + dY, width, ItemHeight);
if (itemBox.Item.IsSelected)
{
if (_selection.Contains(itemBox) == false) _selection.Add(itemBox);
Rectangle innerBox = itemBox.Textbox;
innerBox.Inflate(-1, -1);
Brush b = HighlightBrush(innerBox);
e.Graphics.FillRectangle(b, innerBox);
b.Dispose();
SymbologyGlobal.DrawRoundedRectangle(e.Graphics, _highlightBorderPen, itemBox.Textbox);
e.Graphics.DrawString(e.Item.LegendText, Font, _selectionFontBrush, tempTopLeft);
}
else
{
e.Graphics.DrawString(e.Item.LegendText, Font, Brushes.Black, tempTopLeft);
}
}
int h = ItemHeight;
if (e.Item.LegendSymbolMode == SymbolMode.Symbol)
{
Size s = e.Item.GetLegendSymbolSize();
if (s.Height > h) h = s.Height + 6;
}
topLeft.Y += h;
if (e.Item.IsExpanded)
{
topLeft.X += _indentation;
if (e.Item.LegendItems != null)
{
List<ILegendItem> items = e.Item.LegendItems.ToList();
if (e.Item is IGroup) items.Reverse(); // reverse layers because of drawing order, don't bother reversing categories.
foreach (ILegendItem item in items)
{
DrawLegendItemArgs args = new DrawLegendItemArgs(e.Graphics, item, e.ClipRectangle, topLeft);
topLeft = OnInitializeItem(args);
if (topLeft.Y > ControlRectangle.Bottom) break;
}
}
topLeft.X -= _indentation;
}
return topLeft;
}
/// <summary>
/// Given the current list of Maps or 3DMaps, it
/// rebuilds the treeview nodes
/// </summary>
public void RefreshNodes()
{
// do any code that needs to happen if content changes
_previousMouseDown = null; // to avoid memory leaks, because LegendBox contains reference to Layer
IsInitialized = false;
Invalidate();
}
// Draw the checkbox for an item
private void DrawCheckBoxes(Graphics g, ref PointF topLeft, LegendBox itemBox)
{
ILegendItem item = itemBox.Item;
if (item == null) return;
if (item.LegendSymbolMode != SymbolMode.Checkbox) return;
if (item.Checked)
{
int top = (int)topLeft.Y + (ItemHeight - _icoChecked.Height) / 2;
int left = (int)topLeft.X + 6;
g.DrawIcon(_icoChecked, left, top);
Rectangle box = new Rectangle(left, top, _icoChecked.Width, _icoChecked.Height);
itemBox.CheckBox = box;
}
else
{
int top = (int)topLeft.Y + (ItemHeight - _icoUnchecked.Height) / 2;
int left = (int)topLeft.X + 6;
g.DrawIcon(_icoUnchecked, left, top);
Rectangle box = new Rectangle(left, top, _icoChecked.Width, _icoChecked.Height);
itemBox.CheckBox = box;
}
topLeft.X += 22;
}
private void HideEditBox()
{
if (_editBox.Visible && _ignoreHide == false)
{
_ignoreHide = true;
_previousMouseDown.Item.LegendText = _editBox.Text;
_previousMouseDown = null;
_editBox.Visible = false;
_editBox.Text = string.Empty;
_ignoreHide = false;
RefreshNodes();
}
}
/// <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>
/// Draws the legend item from the DrawLegendItemArgs with all its child items.
/// </summary>
/// <param name="e">DrawLegendItemArgs that are needed to draw the legend item.</param>
/// <returns>The position where the next LegendItem can be drawn.</returns>
protected virtual PointF OnInitializeItem(DrawLegendItemArgs e)
{
if (e.Item.LegendItemVisible == false)
{
return(e.TopLeft);
}
UpdateActions(e.Item);
PointF topLeft = e.TopLeft;
PointF tempTopLeft = topLeft;
if (topLeft.Y > ControlRectangle.Bottom)
{
return(topLeft); // drawing would be below the screen
}
if (topLeft.Y > ControlRectangle.Top - ItemHeight)
{
// Draw the item itself
// Point tl = new Point((int)topLeft.X, (int)topLeft.Y);
var itemBox = new LegendBox();
_legendBoxes.Add(itemBox);
itemBox.Item = e.Item;
itemBox.Bounds = new Rectangle(0, (int)topLeft.Y, Width, ItemHeight);
itemBox.Indent = (int)topLeft.X / Indentation;
DrawPlusMinus(e.Graphics, ref tempTopLeft, itemBox);
int ih = ItemHeight;
if (e.Item.LegendSymbolMode == SymbolMode.Symbol)
{
Size s = e.Item.GetLegendSymbolSize();
if (s.Height > ih)
{
tempTopLeft.Y += 3;
}
}
if (e.Item.LegendSymbolMode == SymbolMode.Symbol || e.Item.LegendSymbolMode == SymbolMode.GroupSymbol)
{
DrawSymbol(e.Graphics, ref tempTopLeft, itemBox);
}
if (e.Item.LegendSymbolMode == SymbolMode.Checkbox)
{
DrawCheckBoxes(e.Graphics, ref tempTopLeft, itemBox);
}
int width = (int)e.Graphics.MeasureString(e.Item.LegendText, Font).Width;
int dY = 0;
if (e.Item.LegendSymbolMode == SymbolMode.Symbol)
{
Size s = e.Item.GetLegendSymbolSize();
if (s.Height > ih)
{
dY = (s.Height - ih) / 2;
}
tempTopLeft.Y += dY;
}
tempTopLeft.Y += (ih - Font.Height) / (float)2;
itemBox.Textbox = new Rectangle((int)tempTopLeft.X, (int)topLeft.Y + dY, width, ItemHeight);
if (itemBox.Item.IsSelected)
{
_selection.Add(itemBox.Item);
Rectangle innerBox = itemBox.Textbox;
innerBox.Inflate(-1, -1);
using (var b = HighlightBrush(innerBox))
{
e.Graphics.FillRectangle(b, innerBox);
}
SymbologyGlobal.DrawRoundedRectangle(e.Graphics, _highlightBorderPen, itemBox.Textbox);
e.Graphics.DrawString(e.Item.LegendText, Font, _selectionFontBrush, tempTopLeft);
}
else
{
e.Graphics.DrawString(e.Item.LegendText, Font, Brushes.Black, tempTopLeft);
}
}
int h = ItemHeight;
if (e.Item.LegendSymbolMode == SymbolMode.Symbol)
{
Size s = e.Item.GetLegendSymbolSize();
if (s.Height > h)
{
h = s.Height + 6;
}
}
topLeft.Y += h;
if (e.Item.IsExpanded)
{
topLeft.X += Indentation;
if (e.Item.LegendItems != null)
{
List <ILegendItem> items = e.Item.LegendItems.ToList();
if (e.Item is IGroup)
{
items.Reverse(); // reverse layers because of drawing order, don't bother reversing categories.
}
foreach (var item in items)
{
var args = new DrawLegendItemArgs(e.Graphics, item, e.ClipRectangle, topLeft);
topLeft = OnInitializeItem(args);
if (topLeft.Y > ControlRectangle.Bottom)
{
break;
}
}
}
topLeft.X -= Indentation;
}
return(topLeft);
}
/// <summary>
/// Initializes a new instance of the <see cref="ItemMouseEventArgs"/> class from an existing MouseEventArgs.
/// </summary>
/// <param name="args">The existing arguments</param>
/// <param name="inItemBox">A LegendBox for comparison</param>
public ItemMouseEventArgs(MouseEventArgs args, LegendBox inItemBox)
: base(args.Button, args.Clicks, args.X, args.Y, args.Delta)
{
ItemBox = inItemBox;
}
/// <summary>
/// Initializes a new instance of the <see cref="ItemMouseEventArgs"/> class.
/// </summary>
/// <param name="inButton">The Mouse Buttons</param>
/// <param name="inClicks">The number of clicks</param>
/// <param name="inX">The X coordinate</param>
/// <param name="inY">The Y coordinate</param>
/// <param name="inDelta">The delta of the mouse wheel</param>
/// <param name="inItemBox">A LegendBox for comparision</param>
public ItemMouseEventArgs(MouseButtons inButton, int inClicks, int inX, int inY, int inDelta, LegendBox inItemBox)
: base(inButton, inClicks, inX, inY, inDelta)
{
ItemBox = inItemBox;
}