制作类似VS工具条的工具树容器

 十一前就开始准备做了,不过一到放假就发现自己懒了,哈哈,现在就把效果图片发上来给大家看看,并谈谈关键部分的代码.

一.设计时效果

二.运行时效果

1)有3个选项页时的运行效果.

2).选项页比较多的时候,在底端对齐后的效果.

3).变换了渐变色后的效果.

三.谈谈设计的实现原理:

制作这个控件需要由2个主要的部分组成.一是容器,二是容器里面显示的选项页.选项页是一个继承自panel的控件(JcsPage),提供了2种布局方式,也就是我们在设计时期图片中看到2种布局(一种是加号展开,减号折叠,另一种是双箭头向下展开,双箭头向上折叠),主要是在onpaint方法里对不同的布局做相应的处理,同时需要重写按钮相应事件,对鼠标位置是否在指定区域(双箭头或加减号所在的矩形区域)的判断,如果在这个区域将引发一事件.容器控件是一个继承自ContainerControl的控件,主要提供对容器内元素的管理以及布局的处理,关键的代码是如何对高度变化的元素做相应位置上的有效调整.另外，因为设置了autoscroll为真,所以,在出现纵向滚动条的时候,要将所有元素的宽度适当地缩小到(容器工作区 - 滚动条宽度)的值.如果哪位朋友有兴趣或需要源代码,可以联系我([email protected] ),不过因为开发的程序大多数都会适当的(其实很少)收取一些费用,所以也请大家谅解!

部分源代码:

 

using  System;
using  System.Collections.Generic;
using  System.ComponentModel;
using  System.Drawing;
using  System.Data;
using  System.Text;
using  System.Windows.Forms;
using  System.Windows.Forms.VisualStyles;
using  System.Drawing.Drawing2D;
namespace  JcsControlLibrary
... {
    public class BaseContainerPanel : ContainerControl
    ...{
      
Fields#region Fields
        private bool _isfirst = true; //是否为第一次排序
        private static ToolStripProfessionalRenderer renderer;
        private CollectionEvents Items = new CollectionEvents();
        private int _expandpagecount = 0; //展开page的数量
        
#endregion

Events#region Events

        public event EventHandler ThemeChanged;

#endregion

Init#region Init

        //static BaseStyledPanel()
        //{
        //    renderer = new ToolStripProfessionalRenderer();
        //}
        public BaseContainerPanel()
        ...{
            SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
            SetStyle(ControlStyles.ResizeRedraw, true);
            SetStyle(ControlStyles.UserPaint, true);
            renderer = new ToolStripProfessionalRenderer();
        }

#endregion

        Methods#region Methods

        protected override void OnSystemColorsChanged(EventArgs e)
        ...{
            base.OnSystemColorsChanged(e);
            UpdateRenderer();
            Invalidate();
        }

        protected virtual void OnThemeChanged(EventArgs e)
        ...{
            if (ThemeChanged != null)
                ThemeChanged(this, e);
        }

        private void UpdateRenderer()
        ...{
            if (!UseThemes)
            ...{
                renderer.ColorTable.UseSystemColors = true;
            }
            else
            ...{
                renderer.ColorTable.UseSystemColors = false;
            }
        }

        #endregion

        Props#region Props

        [Browsable(false)]
        public ToolStripProfessionalRenderer ToolStripRenderer
        ...{
            get ...{ return renderer; }
        }
        //是否使用主题
        [DefaultValue(true)]
        [Browsable(false)]
        public bool UseThemes
        ...{
            get
            ...{
                return VisualStyleRenderer.IsSupported && VisualStyleInformation.IsSupportedByOS && Application.RenderWithVisualStyles;
            }
        }

        #endregion
        private void InitGetExpandPage()
        ...{
            this._expandpagecount = 0;
            for (int i = 0; i < this.Controls.Count; i++)
            ...{
                JcsPage page = (JcsPage)this.Controls[i];
                if (page.IsExpand)
                ...{
                    this._expandpagecount++;
                }
            }
        }
        /**//// 

        /// 是否全部展开
        /// 

        /// 全部展开：TRUE，否则：FALSE
        private bool GetIsAllExpand()
        ...{
            if (this._expandpagecount == this.Controls.Count)
            ...{
                return true;
            }
            else
            ...{
                return false;
            }
        }
        public void AddPage(JcsPage Pageitem)
        ...{
            AddPage( Pageitem, false);
        }
       
        public void AddPage( JcsPage Pageitem, bool autoSelect)
        ...{
            Pageitem.Width = this.ClientRectangle.Width ;
            Pageitem.IsExpand = false;
            if (this.Controls.Contains(Pageitem ))
            return ;
            Items.Add(Pageitem);
            Pageitem.Buttonclickevent += new JcsPage.Buttonclick(Pageitem_Buttonclickevent);
            this.Controls.Add(Pageitem);
            InitGetExpandPage();
            UpdateLayout();
        }
        private JcsPage _currentpage; 
        void Pageitem_Buttonclickevent(object sender)
        ...{
            if (sender != null)
            ...{
                _currentpage = (JcsPage)sender;
                if (_currentpage.IsExpand)
                ...{
                    this._expandpagecount++;
                    //if (this.Controls.IndexOf(_currentpage) == this.Controls.Count - 1)
                    //{
                    //    if (_currentpage.Bottom < this.Bottom && _currentpage.Top > this.Top )
                    //    {
                    //        _currentpage.Height += this.Bottom - _currentpage.Bottom;
                    //    }
                    //}
                }
                else
                ...{
                    this._expandpagecount--;
                }
            }
            this.UpdateLayout();
        }

      
      
        private void UpdateLayout()
        ...{
            /**/////一个都没有展开的情况
            //if (this._expandpagecount == 0)
            //{
            //    if (!this.VScroll)
            //    {
            //        int sumtop = 0;
            //        for (int i = 0; i < Items.Count; i++)
            //        {
            //            JcsPage page = (JcsPage)Items[i];
            //            page.Left = 0;
            //            page.Top = sumtop;
            //            page.Width = this.ClientRectangle.Width;
            //            sumtop += page.Height;
            //        }
            //    }
            //}
            //else
            //{
            //    for (int i = 0; i < Items.Count; i++)
            //    {
                    
            //        JcsPage page = (JcsPage)Items[i];
            //        if (i == 0)
            //        {
            //            page.Dock = DockStyle.Top;
            //        }
            //        else
            //        {
            //            page.Dock = DockStyle.Bottom;
            //        }
               
            //    }
            //}
            if (Items.Count == 0)
                return;

            int index = 0;
            if (_currentpage != null)
            ...{
                index = this.Controls.IndexOf(_currentpage);
            }
            if (_isfirst)
            ...{
                ((JcsPage)Items[index]).Top = 0;
                _isfirst = false;
            }
            int oldtop = ((JcsPage)Items[index]).Top; ;
            int sumtop = oldtop;
            for (int i = index; i < Items.Count; i++)
            ...{
                JcsPage page = (JcsPage)Items[i];
                page.Left = 0;
                page.Top = sumtop;
                page.Width = this.ClientRectangle.Width;
                sumtop += page.Height;
                //if (this.Controls.IndexOf(_currentpage) == this.Controls.Count - 1)
                //{
                //    if (_currentpage.Bottom < this.Bottom && _currentpage.Top > this.Top)
                //    {
                //        _currentpage.Height += this.Bottom - _currentpage.Bottom;
                //    }
                //}
                if (this.Controls.IndexOf(page) == this.Controls.Count - 1)
                ...{
                    if (page.Bottom < this.Bottom && page.Bottom >= 0 && page.IsExpand)
                    ...{
                        page.Height += this.Bottom - page.Bottom;
                    }
                }
            }
        }
        protected override void OnClientSizeChanged(EventArgs e)
        ...{
            base.OnClientSizeChanged(e);
            for (int i = 0; i < Items.Count; i++)
            ...{
                JcsPage page = (JcsPage)Items[i];
                page.Width = this.ClientRectangle.Width;
            }
        }
        protected override void OnPaint(PaintEventArgs e)
        ...{
            base.OnPaint(e);
            Graphics g = e.Graphics;
            using(Pen p= new Pen(Color.Gray))
            ...{
              g.DrawRectangle(p, 0, 0, this.Width-2, this.Height);
            }
        }
    }
}