gmenuitem.cs

语音视频功能 里面实现了基本的QQ与语音对话

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;using System.Drawing.Drawing2D;

namespace gowk.controls
{
	/// <summary>
	/// GMenuItem 的摘要说明。
	/// </summary>
	public class GMenuItem : System.Windows.Forms.MenuItem
	{
		Image image;int itemheight=0;
		public GMenuItem():base()
		{
			this.OwnerDraw=true;
		}
		public GMenuItem(string text,Image img,System.EventHandler onclick):base(text,onclick)
		{
			this.OwnerDraw=true;
			this.image=img;
		}
		public Image Image
		{
			get{return this.image;}
			set
			{
				this.image=value;
				if(this.image!=null)
				{
					this.image=Image.GetThumbnailImage(ControlSetting.MenuItemImageWidth,ControlSetting.MenuItemImageHeight,null,IntPtr.Zero);
				}
			}
		}
		protected override void OnDrawItem(DrawItemEventArgs e)
		{
		//	base.OnDrawItem(e);
			Graphics g=e.Graphics;	
			Rectangle rect=e.Bounds;
			Color foreColor=ControlSetting.ForeColor;
			Color backColor=ControlSetting.BackColor;
			Font font=e.Font;

			g.SmoothingMode=SmoothingMode.AntiAlias;


			if(this.Parent.GetType()==typeof(GContextMenu))
			{
				rect.X+=ControlSetting.ContextMenuBannerWidth;
				rect.Width-=ControlSetting.ContextMenuBannerWidth;
				if(e.Index==0)
				{
					int total=this.GetTotalHeight(g);
					g.TranslateTransform(0,total);
					g.RotateTransform(270);
					Rectangle bannerRect=new Rectangle(0,0,total,ControlSetting.ContextMenuBannerWidth);
					g.FillRectangle(new SolidBrush(Color.White),bannerRect);
					GContextMenu gcm=(GContextMenu)this.Parent;
					if(gcm.Image!=null)
					{
						g.DrawImage(gcm.Image,bannerRect);
					}
					else
					{
						Font f=new Font(font.Name,16,FontStyle.Bold);
						g.DrawString("GOWK",f,new SolidBrush(Color.LightBlue),bannerRect);
					}
					g.ResetTransform();
				}
			}
			if(this.Text=="-")
			{
				g.FillRectangle(new SolidBrush(backColor),rect);
				Color c=Color.FromArgb((int)((backColor.R+foreColor.R)/2)+(int)((backColor.G+foreColor.G)/2)+(int)((backColor.B+foreColor.B)/2));
				g.DrawLine(new Pen(c),rect.X+ControlSetting.ItemOffset,rect.Y+2,rect.Right-ControlSetting.ItemOffset,rect.Y+2);
				return;
			}

			Rectangle imgRect=new Rectangle();
			imgRect.X=rect.X+ControlSetting.ItemOffset;
			imgRect.Y=rect.Y+(int)((rect.Height-ControlSetting.MenuItemImageHeight)/2);
			imgRect.Width=ControlSetting.MenuItemImageWidth;
			imgRect.Height=ControlSetting.MenuItemImageHeight;
	
			PointF strPoint=new PointF();
			strPoint.X=imgRect.Right+ControlSetting.ItemOffset;
			strPoint.Y=rect.Y+(rect.Height-font.Height)/2;

			Rectangle checkBtnRect=new Rectangle();
			checkBtnRect.Width=checkBtnRect.Height=16;
			checkBtnRect.Y=rect.Y+4;
			checkBtnRect.X=rect.Right-checkBtnRect.Width-15;

			if((e.State & DrawItemState.Selected)==DrawItemState.Selected)
			{
				backColor=ControlSetting.SelectedBackColor;
				foreColor=ControlSetting.SelectedForeColor;
				imgRect.Offset(-1,-1);
				strPoint.X-=1;
				strPoint.Y-=1;
			}

//draw the background
			g.FillRectangle(new SolidBrush(backColor),rect);
//draw the icon
			if(this.image!=null)
			{
				g.DrawImage(this.image,imgRect);
			}
			//draw text
			g.DrawString(this.Text,font,new SolidBrush(foreColor),strPoint);
//if this item has child ,draw .......
	/*		if(this.IsParent)
			{
				PointF[] ps=new PointF[3];
				ps[0].X=rect.Right-4;
				ps[0].Y=rect.Y+rect.Height/2;
				ps[1].X=ps[2].X=ps[0].X-3;
				ps[1].Y=ps[0].Y-3;
				ps[2].Y=ps[0].Y+3;
				g.FillPolygon(new SolidBrush(Color.DarkGreen),ps);
			}*/
			//draw the checkbox
			if(this.Checked)
			{
				Pen pen=new Pen(Color.Black,1);
				//		g.DrawRectangle(pen,checkBtnRect);
				g.DrawLine(pen,checkBtnRect.X+2,checkBtnRect.Y+9,checkBtnRect.X+6,checkBtnRect.Bottom-2);
				g.DrawLine(pen,checkBtnRect.X+6,checkBtnRect.Bottom-2,checkBtnRect.X+12,checkBtnRect.Y);
			}

		}
		protected override void OnMeasureItem(MeasureItemEventArgs e)
		{
		//	base.OnMeasureItem (e);
			if(this.Text!="-")
			{
				e.ItemHeight=20;
				this.itemheight=20;
				e.ItemWidth=2*ControlSetting.ItemOffset+ControlSetting.MenuItemImageWidth+(int)(e.Graphics.MeasureString(this.Text,System.Windows.Forms.SystemInformation.MenuFont).Width);
				if(this.Parent.GetType()==typeof(GContextMenu))e.ItemWidth+=ControlSetting.ContextMenuBannerWidth;
				e.ItemWidth+=35;
			}
			else
			{
				e.ItemHeight=3;
				this.itemheight=3;
			}
		}
		int GetTotalHeight(Graphics g)
		{
			int t=0;
		/*	for(int i=0;i<this.Parent.MenuItems.Count;i++)
			{
				MeasureItemEventArgs arg=new MeasureItemEventArgs(g,i);
				this.OnMeasureItem(arg);
				t+=arg.ItemHeight;

			}*/
			foreach(GMenuItem item in this.Parent.MenuItems)
			{
				t+=item.itemheight;
			}
			return t;
		}
	}
}