实例介绍
功能可根据需要自行扩展。
图标尺寸20×20像素,大图标尺寸35×20像素,可自定义,在代码资源文件里查看。
图标库选用vs2017图标库,
在https://www.haolizi.net/example/view_25474.html下载(无需积分)。
using System; using System.Collections.Generic; using System.Drawing; using System.Drawing.Imaging; using System.Windows.Forms; public class ConextMenuItem { public Color Select_boxColor = Color.FromArgb(229, 195, 101); public Color Select_backColor = Color.FromArgb(253, 244, 191); public List<bool> menuEnable = new List<bool>(); public List<Point> points = new List<Point>(); public int Count = 0; private bool itemSelect = true; private ToolTip toolTip = new ToolTip(); private class MenuItem { public string Item_Name; public string Item_Tooltips; public Size Item_Size; public Bitmap Item_Icon; public Point Item_Location; public bool Item_Enable; public bool Item_ShowTips; public Bitmap Item_DisableImage; public MenuItem(string _Name, string _Tips, Size _Size, Bitmap _Icon, bool _Enable, Point _Location, bool _showTips) { Item_Name = _Name; Item_Tooltips = _Tips; Item_Size = _Size; Item_Icon = _Icon; Item_Enable = _Enable; Item_Location = _Location; Item_ShowTips = _showTips; ImageAttributes attr = new ImageAttributes(); attr.SetColorMatrix(new ColorMatrix() { Matrix33 = 0.26f }); Item_DisableImage = new Bitmap(_Icon.Width, _Icon.Height); Graphics g = Graphics.FromImage(Item_DisableImage); g.DrawImage(_Icon, new Rectangle(0, 0, _Icon.Width, _Icon.Height), 0, 0, _Icon.Width, _Icon.Height, GraphicsUnit.Pixel, attr); g.Dispose(); } } private List<MenuItem> Menu_Items = new List<MenuItem>(); public void Clear() { Menu_Items.Clear(); menuEnable.Clear(); points.Clear(); Count = 0; } public void SetItemEnable(Control obj, int _num, bool _enable) { Menu_Items[_num].Item_Enable = _enable; menuEnable[_num] = _enable; if (_enable) { (obj.Controls[Menu_Items[_num].Item_Name].Controls[0] as PictureBoxEx).BackgroundImage = Menu_Items[_num].Item_Icon; } else { (obj.Controls[Menu_Items[_num].Item_Name].Controls[0] as PictureBoxEx).BackgroundImage = Menu_Items[_num].Item_DisableImage; } } public void SetTipsEnable(Control obj, int _num, bool _enable) { Menu_Items[_num].Item_ShowTips = _enable; if (_enable) { toolTip.SetToolTip( obj.Controls[Menu_Items[_num].Item_Name].Controls[0] as PictureBoxEx, Menu_Items[_num].Item_Tooltips ); } else { toolTip.SetToolTip( obj.Controls[Menu_Items[_num].Item_Name].Controls[0] as PictureBoxEx, null ); } } public void SetLocation(Control obj, int _num, Point _location) { obj.Controls[Menu_Items[_num].Item_Name].Location = _location; points[_num] = _location; } public void Add( Control _Inobj, string _Name, string _tipsText, Size _Size, Bitmap _Icon, Point _Location, EventHandler MouseClick, bool _Enable = true, bool _showTips = true ) { Menu_Items.Add(new MenuItem(_Name, _tipsText, _Size, _Icon, _Enable, _Location, _showTips)); Bitmap icon = new Bitmap(_Icon.Width, _Icon.Height); if (_Enable) { icon = _Icon; } else { icon = Menu_Items[Menu_Items.Count - 1].Item_DisableImage; } PictureBoxEx Icon = new PictureBoxEx() { Name = _Name, Location = new Point(1, 1), Size = _Size, BackgroundImage = icon, BackgroundImageLayout = ImageLayout.Center, BackColor = Color.Transparent, Tag = Menu_Items.Count - 1 }; Icon.MouseEnter = Item_MouseEnter; Icon.MouseLeave = Item_MouseLeave; Icon.Click = MouseClick; if (_showTips) { toolTip.SetToolTip(Icon, _tipsText); } PanelEx ToolBar = new PanelEx() { Name = _Name, Size = new Size(_Size.Width 2, _Size.Height 2), Location = _Location, BackColor = Color.Transparent, Tag = Menu_Items.Count - 1 }; ToolBar.Controls.Add(Icon); _Inobj.Controls.Add(ToolBar); menuEnable.Add(_Enable); points.Add(_Location); Count = Menu_Items.Count; } public void Item_MouseEnter(object sender, EventArgs e) { PictureBoxEx pL = (PictureBoxEx)sender; if (Menu_Items[(int)pL.Tag].Item_Enable) { pL.Parent.BackColor = Select_boxColor; pL.BackColor = Select_backColor; pL.Cursor = Cursors.Hand; } else { pL.Cursor = Cursors.Default; } } public void Item_MouseLeave(object sender, EventArgs e) { PictureBoxEx pL = (PictureBoxEx)sender; if (itemSelect) { pL.Parent.BackColor = Color.Transparent; pL.BackColor = Color.Transparent; pL.Cursor = Cursors.Default; } } public void Select_Stay() { itemSelect = false; } public void Select_Restore(Control obj) { itemSelect = true; obj.Parent.BackColor = Color.Transparent; obj.BackColor = Color.Transparent; } }
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