protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
mouseX = e.X;
mouseY = e.Y;
using (var g = CreateGraphics())
{
var handler = new DrawItemHandler(g, -1, -1, this);
DrawItems(handler);
handler.Evaluate(this);
}
if (e.Button != MouseButtons.Left)
{
return;
}
if (hovered.Index == -1)
{
return;
}
if (selecting)
{
selectRangeEnd = hovered.Index;
}
if (e.Y < 0)
{
marginScrollSpeed = e.Y;
if (!marginScrollTimer.Enabled)
{
smoothScrollY = VerticalScroll.Value;
}
marginScrollTimer.Start();
}
else if (e.Y > Height)
{
marginScrollSpeed = e.Y - Height;
if (!marginScrollTimer.Enabled)
{
smoothScrollY = VerticalScroll.Value;
}
marginScrollTimer.Start();
}
else
{
marginScrollTimer.Stop();
}
Invalidate();
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
var min = Math.Min(selectRangeStart, selectRangeEnd);
var max = Math.Max(selectRangeStart, selectRangeEnd);
var handler = new DrawItemHandler(e.Graphics, min, max, this);
DrawItems(handler);
handler.Evaluate(this);
}
/// <summary>
/// Draw this item and all child items
/// </summary>
/// <param name="g"></param>
public void DrawItems(ItemPaintEventArgs e, DrawItemHandler drawHandler)
{
Graphics g = e.Graphics;
GraphicsState saved = g.Save();
try
{
var visibleRect = e.VisibleRectangle;
SetupDrawItemsTransform(g, ref visibleRect);
foreach (VCItemPlacement placement in items.OrderBy(x => x.Item.Priority))
{
if (placement.Item.Visible)
{
var placementBounds = placement.Bounds;
if (placementBounds.IntersectsWith(visibleRect))
{
// Save transformation matrix
Matrix tx = g.Transform;
try
{
// Translate graphics
g.MultiplyTransform(placement.Transform);
// Calculate visible rectangle of placement
var placementVisRect = Rectangle.Intersect(placementBounds, visibleRect);
var localVisRect = placement.ToLocal(placementVisRect);
// Draw placement
drawHandler(new ItemPaintEventArgs(g, localVisRect), placement);
}
finally
{
g.Transform = tx;
}
}
}
}
}
finally
{
if (null != saved)
{
g.Restore(saved);
}
}
}
public void SetDrawItemDelegate(DrawItemHandler func)
{
DrawItemDelegate = func;
}
/// <summary>
/// Draw all child items using the given draw handler.
/// </summary>
/// <param name="g"></param>
void IVCItemContainer.DrawItems(ItemPaintEventArgs e, DrawItemHandler drawHandler)
{
rootContainer.DrawItems(e, drawHandler);
}
protected abstract void DrawItems(DrawItemHandler handler);