private void UpdatePosition(NavBarItemWrapper item, ref int y, int ident = 0)
{
int itemIconPadding = (_itemHeight - _itemIconSize) / 2;
int dropdownPadding = (_itemHeight - _dropdownSize) / 2;
int actualIdent = _collapsing ? 0 : ident;
item.IdentPixel = actualIdent;
item.Boundary = new Rectangle(0, y, Width - 1, _itemHeight);
item.DropDownButtonBoundary = new Rectangle(item.Boundary.Right - dropdownPadding - _dropdownSize, item.Boundary.Top + dropdownPadding, _dropdownSize, _dropdownSize);
item.IconBoundary = new Rectangle(itemIconPadding + actualIdent, y + itemIconPadding, _itemIconSize, _itemIconSize);
item.TextPosition = new Point(itemIconPadding * 2 + _itemIconSize + actualIdent, y + (_itemHeight - TextRenderer.MeasureText(item.Text, Font).Height) / 2);
y += _itemHeight;
if (ItemHasChild(item))
{
if (item.IsExpanded)
{
foreach (var childItem in item.Items)
{
UpdatePosition(childItem, ref y, actualIdent + _identWidth);
}
}
else
{
// Reset position -- prevent hit test
foreach (var childItem in item.Items)
{
childItem.Boundary = Rectangle.Empty;
childItem.DropDownButtonBoundary = Rectangle.Empty;
childItem.TextPosition = Point.Empty;
}
}
}
}
private NavBarItemWrapper GetClickedItem(List <NavBarItemWrapper> items, Point hit)
{
NavBarItemWrapper hitTest = null;
foreach (var item in items)
{
if (item.Boundary.Contains(hit))
{
hitTest = item;
}
else // check child
{
if (ItemHasChild(item))
{
hitTest = GetClickedItem(item.Items, hit);
}
}
// if hitTest found, return
if (hitTest != null)
{
return(hitTest);
}
}
return(hitTest);
}
//
private void HandleMouseClick(MouseEventArgs e)
{
if (e.Button != System.Windows.Forms.MouseButtons.Left)
{
return;
}
var clickedItem = GetClickedItem(this._navBarItems, e.Location);
if (clickedItem != null)
{
if (clickedItem == _collapseExpandItem)
{
_collapseExpandItem.Clicked(this, e);
}
else
{
if (_lastHitTestItem != null)
{
_lastHitTestItem.IsClicked = false;
}
clickedItem.IsExpanded = ItemHasChild(clickedItem) && !clickedItem.IsExpanded;
clickedItem.IsClicked = true;
_lastHitTestItem = clickedItem;
UpdatePosition();
if (clickedItem.Clicked != null)
{
clickedItem.Clicked(_navBarItems, e);
}
}
}
Invalidate();
}
//
public NavigationBar()
{
_enableHighlightReveal = false;
//
_navBarItems = new List <NavBarItemWrapper>();
//
// add collapse button
_collapsingImage = SvgPath8x8Mgr.Get("M5 1v2h-5v2h5v2l3-3.03-3-2.97z" /*=>*/, 4, Brushes.Black, SmoothingMode.HighQuality);
_expadingImage = SvgPath8x8Mgr.Get("M3 1l-3 3.03 3 2.97v-2h5v-2h-5v-2z" /*<=*/, 4, Brushes.Black, SmoothingMode.HighQuality);
_collapseExpandItem = new NavBarItemWrapper(new NavBarItem
{
Icon = _expadingImage,
Clicked = (s, e) =>
{
_collapsing = !_collapsing;
_collapseExpandItem.Icon = _collapsing ? _collapsingImage : _expadingImage;
this.Width = _collapsing ? _itemHeight : _expandedWidth;
UpdatePosition();
if (OnCollapseExpandStateChanged != null)
{
OnCollapseExpandStateChanged(this, EventArgs.Empty);
}
}
});
_expandedWidth = 200;
//
_navBackgroundBrush = BrushCreator.CreateSolidBrush();
_navItemBackgroundBrush = BrushCreator.CreateSolidBrush();
_navClickedItemBrush = BrushCreator.CreateSolidBrush();
_navItemTextBrush = BrushCreator.CreateSolidBrush("255, 0, 0, 0");
_navItemBorderPen = PenCreator.Create();
DoubleBuffered = true;
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
}
private void PaintItem(NavBarItemWrapper item, Graphics g)
{
if (item != _collapseExpandItem && (item.IsHovered || item.IsClicked))
{
_navItemBackgroundBrush.Color = ExColorTranslator.Get("128, 128, 128, 128");
_navItemBorderPen.Color = ExColorTranslator.Get("128, 93, 93, 93");
g.FillRectangle(_navItemBackgroundBrush, item.Boundary);
g.DrawRectangle(_navItemBorderPen, new Rectangle(-1, item.Boundary.Y, this.Width, item.Boundary.Height));
}
if (item.IsClicked)
{
g.FillRectangle(_navClickedItemBrush, new Rectangle(0, item.Boundary.Y + 1, 3 /*px*/, item.Boundary.Height - 1));
}
// Draw reveal highlight
if (item.IsHovered && item != _collapseExpandItem)
{
if (_enableHighlightReveal)
{
int halfRebelSize = 100;
// TODO:
// Brush created everytime so render performance will be decreased
// Replace with Translate matrix stuff
if (_navLeftRevealHighlightBrush != null)
{
_navLeftRevealHighlightBrush.Dispose();
_navLeftRevealHighlightBrush = null;
}
if (_navRightRevealHighlightBrush != null)
{
_navRightRevealHighlightBrush.Dispose();
_navRightRevealHighlightBrush = null;
}
Rectangle leftRevealHighlightRect = new Rectangle(_mouseLocation.X - halfRebelSize, item.Boundary.Y, halfRebelSize, item.Boundary.Height + 1);
Rectangle rightRevealHighlightRect = new Rectangle(_mouseLocation.X, item.Boundary.Y, halfRebelSize, item.Boundary.Height + 1);
_navLeftRevealHighlightBrush = new LinearGradientBrush(
leftRevealHighlightRect,
ExColorTranslator.Get("0, 200, 200, 200"),
ExColorTranslator.Get("100, 255, 255, 255"), 0f);
_navRightRevealHighlightBrush = new LinearGradientBrush(
rightRevealHighlightRect,
ExColorTranslator.Get("100, 255, 255, 255"),
ExColorTranslator.Get("0, 200, 200, 200"), 0f);
g.FillRectangle(_navLeftRevealHighlightBrush, leftRevealHighlightRect);
g.FillRectangle(_navRightRevealHighlightBrush, rightRevealHighlightRect);
}
}
if (item.Icon != null)
{
g.DrawImage(item.Icon, item.IconBoundary);
}
if (item != _collapseExpandItem)
{
g.DrawString(item.Text, Font, _navItemTextBrush, item.TextPosition);
}
// draw arrow and child item if needed
if (item != _collapseExpandItem && item.Items != null)
{
if (item.IsExpanded)
{
// Draw dropdown arrow only mouse enter nav bar
if (_isMouseIn && !_collapsing)
{
g.DrawImage(SvgPath8x8Mgr.Get("M0,0H8L4,8z", 1, Brushes.Black), item.DropDownButtonBoundary);
}
foreach (var childItem in item.Items)
{
PaintItem(childItem, g);
}
}
else
{
// Draw dropdown arrow only mouse enter nav bar
if (_isMouseIn && !_collapsing)
{
g.DrawImage(SvgPath8x8Mgr.Get("M0,8H8L4,0z", 1, Brushes.Black), item.DropDownButtonBoundary);
}
}
}
}
private bool ItemHasChild(NavBarItemWrapper item)
{
return(item.Items != null && item.Items.Count > 0);
}
