private void HandlePaintBackground(PaintEventArgs e)
{
var bufferImage = new ImageWithDeviceContext(Size);
Graphics g = Graphics.FromHdc(bufferImage.Dc);
DrawBackground(bufferImage);
int last = LastScrollableItemIndex;
var mousePos = _form.PointToClient(Cursor.Position);
var currentHoverred = mousePos.Y / ItemHeight;
int relativeIndex = 0;
for (int i = FirstScrollableItemIndex; i <= last; i++)
{
LayeredPopupMenuItem item = Items[i];
DrawItem(bufferImage, g, item, relativeIndex, currentHoverred == relativeIndex);
relativeIndex++;
}
NativeMethods.BitBlt(e.Graphics.GetHdc(), 0, 0, Width, Height, bufferImage.Dc, 0, 0, CopyPixelOperation.SourceCopy);
e.Graphics.ReleaseHdc();
bufferImage.Dispose();
g.Dispose();
}
private void HandleMouseClick(MouseEventArgs e)
{
var mousePos = _form.PointToClient(Cursor.Position);
var currentHoverred = mousePos.Y / ItemHeight;
LayeredPopupMenuItem clicked = Items[currentHoverred];
OnItemClicked((String)clicked.Tag);
}
private void DrawText(Graphics g, LayeredPopupMenuItem item, Rectangle textBounds)
{
Font font = item.Bold ? FontBold : Font;
g.TextContrast = 0;
g.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;
g.DrawString(item.Text, font, ForeColorBrush, textBounds, DefaultStringFormat);
}
private void DrawImage(IDeviceContext destImage, LayeredPopupMenuItem item, Rectangle bounds, bool hovered)
{
ImageWithDeviceContext itemImage = ItemBackgroundImage;
if (item.Checked || hovered)
{
itemImage = ItemHoveredBackgroundImage;
}
ImageRenderer.StretchImageWithOutMargin(destImage, bounds.X, bounds.Y, bounds.Width, bounds.Height,
itemImage, 0, itemImage.Width, itemImage.Height,
StretchMargin, 255);
}
protected virtual void DrawItem(ImageWithDeviceContext destImage, Graphics g, LayeredPopupMenuItem item, int index, bool hovered)
{
var bounds = new Rectangle();
bounds.Width = Width - (ContentMargin.Right + ContentMargin.Left + ItemContentRight);
bounds.Height = ItemBackgroundImage.Height;
bounds.X = ContentMargin.Left;
bounds.Y = ContentMargin.Top + index * bounds.Height;
DrawImage(destImage, item, bounds, hovered);
Rectangle textBounds = bounds;
textBounds.X += ItemContent.Left;
textBounds.Y += ItemContent.Top;
textBounds.Width -= ItemContent.Left + ItemContent.Right + ItemContentRight;
textBounds.Height -= ItemContent.Top + ItemContent.Bottom;
DrawText(g, item, textBounds);
if (hovered && item.HoveredImage != null)
{
g.DrawImage(item.HoveredImage, ItemIconLocation.X + bounds.X, ItemIconLocation.Y + bounds.Y);
}
else if (item.Image != null)
{
g.DrawImage(item.Image, ItemIconLocation.X + bounds.X, ItemIconLocation.Y + bounds.Y);
}
}