Source/TabStripRoundHeaderDisplay.cs

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using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Text;

namespace DevComponents.DotNetBar
{
	/// <summary>
	/// Represents class performing the display of tabs with RoundHeader style.
	/// </summary>
	internal class TabStripRoundHeaderDisplay:TabStripBaseDisplay
	{
		#region Methods
		public override void Paint(Graphics g, TabStrip tabStrip)
		{
			base.Paint(g,tabStrip);

			TabsCollection tabs=tabStrip.Tabs;
			TabColorScheme colorScheme=tabStrip.ColorScheme;
			Rectangle clientRect=tabStrip.ClientRectangle;
			
			Rectangle r=tabStrip.DisplayRectangle;
			r.Inflate(2,2);
			using(SolidBrush brush=new SolidBrush(tabStrip.BackColor))
				g.FillRectangle(brush,r);
			//g.Clear(tabStrip.BackColor);

			TabItem lastTab=GetLastVisibleTab(tabs);

            Rectangle selectedRect = Rectangle.Empty;
            if (tabStrip.SelectedTab != null)
                selectedRect = tabStrip.SelectedTab.DisplayRectangle;
            DrawBackground(tabStrip, clientRect, g, colorScheme, GetTabsRegion(tabs, lastTab), tabStrip.TabAlignment, selectedRect);

			bool bFirstVisible=true;

			foreach(TabItem tab in tabs)
			{
				if(!tab.Visible)
					continue;
                if(tab.DisplayRectangle.IntersectsWith(clientRect))
				    PaintTab(g,tab,bFirstVisible,(tab==lastTab));
				
				bFirstVisible=false;
			}
		}

		protected override Region GetTabsRegion(TabsCollection tabs, TabItem lastTab)
		{
			bool bFirstVisible=true;
			Region tabRegion=new Region();
			tabRegion.MakeEmpty();
			foreach(TabItem tab in tabs)
			{
				if(!tab.Visible)
					continue;				
				GraphicsPath path=GetTabItemPath(tab,bFirstVisible,(tab==lastTab));
				tabRegion.Union(path);
				bFirstVisible=false;
			}
			return tabRegion;