用重绘的滚动条控制ListBox的滚动

用重绘的滚动条控制ListBox的滚动查了很多资料，都找不到直接重写ListBox滚动条的方法，只能曲线救国，先自己重绘一个带皮肤的滚动条,然后让它取代ListBox现有的滚动条.老习惯，先传个效果图，你觉得感兴趣就继续看下去，不喜欢的话就此打住，懒得耽误你宝贵的时间，嘿嘿注意，此图中的滚动条宽度明显小于ListBox本身滚动条的宽度，我目前只顾着实现功能了，毕竟，宽度调整相当简单哈。下面简单介绍下重绘系统滚动条的详细步骤：在项目中添加新项--用户控件，我们命名为CustomScrollbar.cs准备几张图片添加进项目资源作为滚动条重绘时要用的背景我用的图片如下：uparrow.png资源名称为uparrow ，滚动条的上箭头ThumbBottom.png资源名称为ThumbBottom，滚动条中间滑道的背景ThumbMiddle.png资源名称为ThumbMiddle，滚动条的中间的拖动块downarrow.png资源名称为downarrow ，滚动条的下箭头3.然后就是利用上面图片做背景重画滚动条背景了，直接给出CustomScrollbar.cs的代码吧CodeusingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Drawing;usingSystem.Data;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Windows.Forms.Design;usingSystem.Diagnostics;namespaceWinamp{[Designer(typeof(ScrollbarControlDesigner))]publicpartialclassCustomScrollbar:UserControl{protectedColormoChannelColor=Color.Empty;protectedImagemoUpArrowImage=null;//上箭头//protectedImagemoUpArrowImage_Over=null;//protectedImagemoUpArrowImage_Down=null;protectedImagemoDownArrowImage=null;//T箭头//protectedImagemoDownArrowImage_Over=null;//protectedImagemoDownArrowImage_Down=null;protectedImagemoThumbArrowImage=null;protectedImagemoThumbTopImage=null;protectedImagemoThumbTopSpanImage=null;protectedImagemoThumbBottomImage=null;protectedImagemoThumbBottomSpanImage=null;protectedImagemoThumbMiddleImage=null;protectedintmoLargeChange=10;protectedintmoSmallChange=1;protectedintmoMinimum=0;protectedintmoMaximum=100;protectedintmoValue=0;privateintnClickPoint;protectedintmoThumbTop=0;protectedboolmoAutoSize=false;privateboolmoThumbDown=false;privateboolmoThumbDragging=false;publicneweventEventHandlerScroll=null;publiceventEventHandlerValueChanged=null;privateintGetThumbHeight(){intnTrackHeight=(this.Height-(UpArrowImage.Height+DownArrowImage.Height));floatfThumbHeight=((float)LargeChange/(float)Maximum)*nTrackHeight;intnThumbHeight=(int)fThumbHeight;if(nThumbHeight>nTrackHeight){nThumbHeight=nTrackHeight;fThumbHeight=nTrackHeight;}if(nThumbHeight<56){nThumbHeight=56;fThumbHeight=56;}returnnThumbHeight;}publicCustomScrollbar(){InitializeComponent();SetStyle(ControlStyles.ResizeRedraw,true);SetStyle(ControlStyles.AllPaintingInWmPaint,true);SetStyle(ControlStyles.DoubleBuffer,true);moChannelColor=Color.FromArgb(51,166,3);UpArrowImage=BASSSkin.uparrow;//上箭头DownArrowImage=BASSSkin.downarrow;//T肩头ThumbBottomImage=BASSSkin.ThumbBottom;ThumbMiddleImage=BASSSkin.ThumbMiddle;this.Width=UpArrowImage.Width;//18pxbase.MinimumSize=newSize(UpArrowImage.Width,UpArrowImage.Height+DownArrowImage.Height+GetThumbHeight());}[EditorBrowsable(EditorBrowsableState.Always),Browsable(true),DefaultValue(false),Category("Behavior"),Description("LargeChange")]publicintLargeChange{get{returnmoLargeChange;}set{moLargeChange=value;Invalidate();}}[EditorBrowsable(EditorBrowsableState.Always),Browsable(true),DefaultValue(false),Category("Behavior"),Description("SmallChange")]publicintSmallChange{get{returnmoSmallChange;}set{moSmallChange=value;Invalidate();}}[EditorBrowsable(EditorBrowsableState.Always),Browsable(true),DefaultValue(false),Category("Behavior"),Description("Minimum")]publicintMinimum{get{returnmoMinimum;}set{moMinimum=value;Invalidate();}}[EditorBrowsable(EditorBrowsableState.Always),Browsable(true),DefaultValue(false),Category("Behavior"),Description("Maximum")]publicintMaximum{get{returnmoMaximum;}set{moMaximum=value;Invalidate();}}[EditorBrowsable(EditorBrowsableState.Always),Browsable(true),DefaultValue(false),Category("Behavior"),Description("Value")]publicintValue{get{returnmoValue;}set{moValue=value;intnTrackHeight=(this.Height-(UpArrowImage.Height+DownArrowImage.Height));floatfThumbHeight=((float)LargeChange/(float)Maximum)*nTrackHeight;intnThumbHeight=(int)fThumbHeight;if(nThumbHeight>nTrackHeight){nThumbHeight=nTrackHeight;fThumbHeight=nTrackHeight;}if(nThumbHeight<56){nThumbHeight=56;fThumbHeight=56;}//figureoutvalueintnPixelRange=nTrackHeight-nThumbHeight;intnRealRange=(Maximum-Minimum)-LargeChange;floatfPerc=0.0f;if(nRealRange!=0){fPerc=(float)moValue/(float)nRealRange;floatfTop=fPerc*nPixelRange;moThumbTop=(int)fTop;Invalidate();}}[EditorBrowsable(EditorBrowsableState.Always),Browsable(true),DefaultValue(false),Category("Skin"),Description("ChannelColor")]publicColorChannelColor{get{returnmoChannelColor;}set{moChannelColor=value;}}[EditorBrowsable(EditorBrowsableState.Always),Browsable(true),DefaultValue(false),Category("Skin"),Description("UpArrowGraphic")]publicImageUpArrowImage{get{returnmoUpArrowImage;}set{moUpArrowImage=value;}}[EditorBrowsable(EditorBrowsableState.Always),Browsable(true),DefaultValue(false),Category("Skin"),Description("UpArrowGraphic")]publicImageDownArrowImage{get{returnmoDownArrowImage;}set{moDownArrowImage=value;}}[EditorBrowsable(EditorBrowsableState.Always),Browsable(true),DefaultValue(false),Category("Skin"),Description("UpArrowGraphic")]publicImageThumbBottomImage{get{returnmoThumbBottomImage;}set{moThumbBottomImage=value;}}[EditorBrowsable(EditorBrowsableState.Always),Browsable(true),DefaultValue(false),Category("Skin"),Description("UpArrowGraphic")]publicImageThumbMiddleImage{get{returnmoThumbMiddleImage;}set{moThumbMiddleImage=value;}}protectedoverridevoidOnPaint(PaintEventArgse){e.Graphics.InterpolationMode =System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;if(UpArrowImage!=null){e.Graphics.DrawImage(UpArrowImage,newRectangle(newPoint(0,0),newSize(this.Width,UpArrowImage.Height)));}BrushoBrush=newSolidBrush(moChannelColor);BrushoWhiteBrush=newSolidBrush(Color.FromArgb(255,255,255));// 函数名:rectangle〃功能：画一个矩形//用法:voidfarrectangle(intleft,inttop,intright,intbottom);//drawchannelleftandrightbordercolorse.Graphics.FillRectangle(oWhiteBrush,newRectangle(0,UpArrowImage.Height,1,(this.Height-DownArrowImage.Height)));e.Graphics.FillRectangle(oWhiteBrush,newRectangle(this.Width- 1,UpArrowImage.Height,1,(this.Height-DownArrowImage.Height)));//drawchannel//e.Graphics.FillRectangle(oBrush,newRectangle(1,UpArrowImage.Height,this.Width-2,(this.Height-DownArrowImage.Height)));e.Graphics.DrawImage(ThumbBottomImage, new Rectangle(0,UpArrowImage.Height,this.Width,(this.Height-DownArrowImage.Height)));//drawthumbintnTrackHeight=(this.Height-(UpArrowImage.Height+DownArrowImage.Height));floatfThumbHeight=((float)LargeChange/(float)Maximum)*nTrackHeight;intnThumbHeight=(int)fThumbHeight;if(nThumbHeight>nTrackHeight){nThumbHeight=nTrackHeight;fThumbHeight=nTrackHeight;}//MessageBox.Show(nThumbHeight.ToString());if(nThumbHeight<56){nThumbHeight=56;fThumbHeight=56;}//Debug.WriteLine(nThumbHeight.ToString());//floatfSpanHeight=(fThumbHeight-(ThumbMiddleImage.Height+ThumbTopImage.Height+ThumbBottomImage.Height))/2.0f;//intnSpanHeight=(int)fSpanHeight;intnTop=moThumbTop;//0nTop+=UpArrowImage.Height;//9px//drawtop画上面的按钮//e.Graphics.DrawImage(ThumbTopImage,newRectangle(0,nTop,this.Width,ThumbTopImage.Height));//nTop+=ThumbTopImage.Height;//10px//drawtopspan//Rectanglerect=newRectangle(1,nTop,this.Width-2,nSpanHeight);//e.Graphics.DrawImage(ThumbTopSpanImage, 1.0f,(float)nTop,(float)this.Width-2.0f,(float)fSpanHeight*2);//nTop+=nSpanHeight;//11px//drawmiddlee.Graphics.DrawImage(ThumbMiddleImage,newRectangle(0,nTop,this.Width,ThumbMiddleImage.Height));//nTop+=ThumbMiddleImage.Height;//drawtopspan//rect=newRectangle(1,nTop,this.Width-2,nSpanHeight*2);//e.Graphics.DrawImage(ThumbBottomSpanImage,rect);//nTop+=nSpanHeight;//drawbottom//e.Graphics.DrawImage(ThumbBottomImage,newRectangle(1,nTop,this.Width-2,nSpanHeight));if(DownArrowImage!=null){e.Graphics.DrawImage(DownArrowImage,newRectangle(newPoint(0,(this.Height-DownArrowImage.Height)),newSize(this.Width,DownArrowImage.Height)));}}publicoverrideboolAutoSize{get{returnbase.AutoSize;}set{base.AutoSize=value;if(base.AutoSize){this.Width=moUpArrowImage.Width;}}}privatevoidInitializeComponent(){this.SuspendLayout();////CustomScrollbar//this.Name="CustomScrollbar";this.MouseDown += newSystem.Windows.Forms.MouseEventHandler(this.CustomScrollbar_MouseDown);this.MouseMove += newSystem.Windows.Forms.MouseEventHandler(this.CustomScrollbar_MouseMove);this.MouseUp += newSystem.Windows.Forms.MouseEventHandler(this.CustomScrollbar_MouseUp);this.ResumeLayout(false);privatevoidCustomScrollbar_MouseDown(objectsender,MouseEventArgse){PointptPoint=this.PointToClient(Cursor.Position);intnTrackHeight=(this.Height-(UpArrowImage.Height+DownArrowImage.Height));floatfThumbHeight=((float)LargeChange/(float)Maximum)*nTrackHeight;intnThumbHeight=(int)fThumbHeight;if(nThumbHeight>nTrackHeight){nThumbHeight=nTrackHeight;fThumbHeight=nTrackHeight;}if(nThumbHeight<56){nThumbHeight=56;fThumbHeight=56;}intnTop=moThumbTop;nTop+=UpArrowImage.Height;Rectanglethumbrect=newRectangle(newPoint(1,nTop),newSize(ThumbMiddleImage.Width,nThumbHeight));if(thumbrect.Contains(ptPoint)){//hitthethumbnClickPoint=(ptPoint.Y-nTop);//MessageBox.Show(Convert.ToString((ptPoint.Y-nTop)));this.moThumbDown=true;}Rectangleuparrowrect=newRectangle(newPoint(1,0),newSize(UpArrowImage.Width,UpArrowImage.Height));if(uparrowrect.Contains(ptPoint)){intnRealRange=(Maximum-Minimum)-LargeChange;intnPixelRange=(nTrackHeight-nThumbHeight);if(nRealRange>0){if(nPixelRange>0){if((moThumbTop-SmallChange)<0)moThumbTop=0;elsemoThumbTop-=SmallChange;//figureoutvaluefloatfPerc=(float)moThumbTop/(float)nPixelRange;floatfValue=fPerc*(Maximum-LargeChange);moValue=(int)fValue;Debug.WriteLine(moValue.ToString());if(ValueChanged!=null)ValueChanged(this,newEventArgs());if(Scroll!=null)Scroll(this,newEventArgs());Invalidate();}}}Rectangledownarrowrect=newRectangle(newPoint(1,UpArrowImage.Height+nTrackHeight),newSize(UpArrowImage.Width,UpArrowImage.Height));if(downarrowrect.Contains(ptPoint)){intnRealRange=(Maximum-Minimum)-LargeChange;intnPixelRange=(nTrackHeight-nThumbHeight);if(nRealRange>0){if(nPixelRange>0){if((moThumbTop+SmallChange)>nPixelRange)moThumbTop=nPixelRange;elsemoThumbTop+=SmallChange;//figureoutvaluefloatfPerc=(float)moThumbTop/(float)nPixelRange;floatfValue=fPerc*(Maximum-LargeChange);moValue=(int)fValue;Debug.WriteLine(moValue.ToString());if(ValueChanged!=null)ValueChanged(this,newEventArgs());$$$$$$$$$$$$$$$$4为ListBox控件添加水平滚动条下面我来为这个列表控件来添加水平滚动条，首先需要在资源的设计中为这个列表控件设置水平滚动条，然后就可以通过向列表控件发送一条LB_SETHORIZONTALEXTENT消息来向它添加水平滚动条了。在这条消息的附加参数中，wParam参数就是以像素为单位的水平滚动条长度，IParam不使用。那么，可以为这个滚动条设置一个足够的长度(假设为500)，有以下的代码：caseWM_INITDIALOG:(HDChdc;inti;TCHARstr[100];for(i=0;i<100;i++)(wsprintf(str,"Thisisaveryveryveryveryverylongsentence-line%d",i+1);SendDlgItemMessage(hDlg,IDC_LIST,LB_ADDSTRING,0,(LPARAM)str);}SendDlgItemMessage(hDlg,IDC_LIST,LB_SETHORIZONTALEXTENT,500,0);//设置长度为500像素的水平滚动