using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Windows.Forms;
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namespace DPumpHydr.WinFrmUI.WenSkin.Controls
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{
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[ToolboxBitmap(typeof(TabControl))]
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public partial class WenTabControl : System.Windows.Forms.TabControl
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{
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public WenTabControl() : base()
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{
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this.DrawMode = TabDrawMode.OwnerDrawFixed;
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this.SizeMode = TabSizeMode.Fixed;
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this.ItemSize = new Size(120, 25);
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base.SetStyle(
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ControlStyles.UserPaint |
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ControlStyles.DoubleBuffer |
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ControlStyles.OptimizedDoubleBuffer |
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ControlStyles.AllPaintingInWmPaint |
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ControlStyles.ResizeRedraw |
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ControlStyles.SupportsTransparentBackColor, true);
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base.UpdateStyles();
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}
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#region 私有属性
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private int mouseMovePageIndex = -1;
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private bool mouseMovePageColse = false;
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private bool closeButtonEnable = true;
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private bool iconEnable=false;
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#endregion
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#region 公有属性
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[Category("Wen")]
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[Description("背景图片")]
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public Image BackImage { get; set; }
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[Category("Wen"), Description("是否显示关闭按钮")]
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public bool CloseButtonEnable { get => closeButtonEnable; set { closeButtonEnable = value; this.Invalidate(); } }
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[Category("Wen"), Description("是否显示图标"), DefaultValue(false)]
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public bool IconEnable { get => iconEnable; set => iconEnable = value; }
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#endregion
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protected override void OnPaint(PaintEventArgs e)
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{
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Graphics g = e.Graphics;
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g.SetGDIHigh();
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//base.OnPaint(e);
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Rectangle rec = this.ClientRectangle;
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Control control = this.Parent;
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Color color = control.BackColor;
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Brush brush = new SolidBrush(color);
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if (BackImage != null)
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{
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g.DrawImage(BackImage, new Rectangle(-2, -2, this.Width + 4, this.Height + 4));
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}
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else
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{
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g.FillRectangle(brush, new Rectangle(-2, -2, this.Width + 4, this.Height + 4));
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}
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StringFormat stringFormat = new StringFormat(StringFormatFlags.NoWrap)
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{
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Alignment = StringAlignment.Near,
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LineAlignment = StringAlignment.Center
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};
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//画一条长底纹实线条
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Rectangle recLine = new Rectangle(0, this.ItemSize.Height + 2, this.Width, 1);
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using (Brush b = new SolidBrush(Color.FromArgb(0, 122, 204)))
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{
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g.FillRectangle(b, recLine);
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}
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//获取当前选中项目索引
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int selectIndex = this.SelectedIndex;
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foreach (TabPage tab in this.TabPages)
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{
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int index = this.TabPages.IndexOf(tab);
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Rectangle rectab = this.GetTabRect(index);
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//背景颜色
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Brush back = new SolidBrush(color);
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if (index == selectIndex)
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back = new SolidBrush(Color.FromArgb(0, 122, 204));
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//绘制选中底纹
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g.FillRectangle(back, rectab);
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////绘制文字区域
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//Rectangle recStr = new Rectangle(rectab.X, rectab.Y, rectab.Width - 20, rectab.Height);
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////绘制文字
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//g.DrawString(tab.Text, tab.Font, new SolidBrush(tab.ForeColor), recStr, stringFormat);
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ImageIcoOrText(tab, g, rectab);
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//绘制关闭按钮
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if (index == selectIndex)
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CloseButton(g, rectab, false);
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//注销内存
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back.Dispose();
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}
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stringFormat.Dispose();
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}
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//画tab图标和文字
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private void ImageIcoOrText(TabPage tabPage, Graphics g, Rectangle rec)
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{
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StringFormat stringFormat = new StringFormat(StringFormatFlags.NoWrap)
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{
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Alignment = StringAlignment.Near,
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LineAlignment = StringAlignment.Center
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};
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if (IconEnable && tabPage is WenTabPage page && page.Image != null)
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{
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//绘制图标区域
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Rectangle recimage = new Rectangle(rec.X + 3, rec.Y + (rec.Height - 16) / 2, 16, 16);
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g.DrawImage(page.Image, recimage);
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//绘制文字区域
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Rectangle recStr = new Rectangle(recimage.X + recimage.Width + 3, rec.Y, rec.Width - 20 - (recimage.Width + 6), rec.Height);
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g.DrawString(page.Text, page.Font, new SolidBrush(page.ForeColor), recStr, stringFormat);
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}
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else
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{
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//绘制文字区域
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Rectangle recStr = new Rectangle(rec.X, rec.Y, rec.Width - 20, rec.Height);
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//绘制文字
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g.DrawString(tabPage.Text, tabPage.Font, new SolidBrush(tabPage.ForeColor), recStr, stringFormat);
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}
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}
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//关闭按钮功能
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protected override void OnMouseDown(MouseEventArgs e)
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{
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base.OnMouseDown(e);
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//关闭按钮不显示，功能取消
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if (!closeButtonEnable)
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return;
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if (e.Button == MouseButtons.Left)
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{
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if (mouseMovePageColse && mouseMovePageIndex > -1)
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{
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this.TabPages.RemoveAt(mouseMovePageIndex);
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}
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}
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}
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//绘制关闭按钮
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private void CloseButton(Graphics g, Rectangle rec, bool close)
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{
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//当不显示关闭按钮直接返回
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if (!closeButtonEnable)
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return;
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int closeSize = 8;
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//获取关闭按钮Y需要移动区域 便于按钮居中
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int yMove = (ItemSize.Height - closeSize) / 2;
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//偏移矩形框
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rec.Offset(rec.Width - closeSize - 5, yMove);
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//重新设置矩形框的大小
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rec.Width = closeSize;
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rec.Height = closeSize;
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//如果关闭为True绘制圆圈背景效果
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if (close)
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g.FillEllipse(Brushes.DarkGray, rec.X - 4, rec.Y - 4, 16, 16);
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//用DrawLine绘制两条线段 实现X 样子效果
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using Pen pen = new Pen(Color.Gray)
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{
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Width = 2
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};
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g.DrawLine(pen, rec.X, rec.Y, rec.X + closeSize, rec.Y + closeSize);
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g.DrawLine(pen, rec.X, rec.Y + closeSize, rec.X + closeSize, rec.Y);
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}
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//鼠标移动事件
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protected override void OnMouseMove(MouseEventArgs e)
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{
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base.OnMouseMove(e);
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int beforeMouseIndex = mouseMovePageIndex;
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foreach (TabPage tab in this.TabPages)
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{
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int index = this.TabPages.IndexOf(tab);
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if (this.GetTabRect(index).Contains(e.Location))
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{
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mouseMovePageIndex = index;
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}
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}
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if (mouseMovePageIndex == -1 || mouseMovePageIndex >= this.TabPages.Count)
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return;
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//获取关闭区域
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int closeSize = 20;
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Rectangle rec = this.GetTabRect(mouseMovePageIndex);
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//检查关闭区域
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Rectangle recClose = this.GetTabRect(mouseMovePageIndex);
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recClose.Offset(recClose.Width - closeSize, 4);
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recClose.Width = closeSize;
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recClose.Height = closeSize;
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bool mouseMovePageColse = this.mouseMovePageColse;
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if (recClose.Contains(e.Location))
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{
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this.mouseMovePageColse = true;
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}
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else
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{
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this.mouseMovePageColse = false;
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}
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//判定鼠标是否已经改变项
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if (beforeMouseIndex == mouseMovePageIndex && mouseMovePageColse == this.mouseMovePageColse)
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{
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return;
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}
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Graphics g = this.CreateGraphics();
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g.SetClip(new Rectangle(rec.X + 1, rec.Y + 1, rec.Width - 2, rec.Height - 2));
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//鼠标移动改变两处重绘
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if (this.mouseMovePageColse)
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{
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DrawTabPageLable(g, this.TabPages[mouseMovePageIndex], rec, Color.FromArgb(28, 151, 234), true);
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}
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else
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{
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DrawTabPageLable(g, this.TabPages[mouseMovePageIndex], rec, Color.FromArgb(28, 151, 234), false);
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}
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int selectIndex = this.SelectedIndex;
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Control control = this.Parent;
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Color color = control.BackColor;
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if (beforeMouseIndex == selectIndex)
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color = Color.DodgerBlue;
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//改变后的上一个信息
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if (beforeMouseIndex != -1 && beforeMouseIndex != mouseMovePageIndex && beforeMouseIndex < this.TabPages.Count)
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{
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Rectangle recBefore = this.GetTabRect(beforeMouseIndex);
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g.SetClip(recBefore);
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DrawTabPageLable(g, this.TabPages[beforeMouseIndex], recBefore, color, null);
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}
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}
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//画标签
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private void DrawTabPageLable(Graphics g, TabPage tab, Rectangle rec, Color color, bool? colse)
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{
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g.SetGDIHigh();
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using StringFormat stringFormat = new StringFormat(StringFormatFlags.NoWrap)
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{
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Alignment = StringAlignment.Near,
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LineAlignment = StringAlignment.Center
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};
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//声明画笔
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using Brush brushe = new SolidBrush(color);
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using Brush brusheStr = new SolidBrush(tab.ForeColor);
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//绘制选中底纹
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g.FillRectangle(brushe, rec);
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////绘制文字区域
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//Rectangle recStr = new Rectangle(rec.X, rec.Y, rec.Width - 20, rec.Height);
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////绘制文字
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//g.DrawString(tab.Text, tab.Font, brusheStr, recStr, stringFormat);
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ImageIcoOrText(tab, g, rec);
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//绘制关闭按钮
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if (colse == null)
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{
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if (this.SelectedTab == tab)
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{
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CloseButton(g, rec, false);
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}
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return;
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}
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if (colse == true)
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CloseButton(g, rec, true);
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else
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CloseButton(g, rec, false);
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}
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//鼠标离开事件
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protected override void OnMouseLeave(EventArgs e)
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{
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base.OnMouseLeave(e);
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if (mouseMovePageIndex == -1 || mouseMovePageIndex >= this.TabPages.Count)
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return;
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Graphics g = this.CreateGraphics();
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int selectIndex = this.SelectedIndex;
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Control control = this.Parent;
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Color color = control.BackColor;
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if (mouseMovePageIndex == selectIndex)
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color = Color.DodgerBlue;
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//设置rec大小
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Rectangle recBefore = this.GetTabRect(mouseMovePageIndex);
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g.SetClip(recBefore);
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DrawTabPageLable(g, this.TabPages[mouseMovePageIndex], recBefore, color, null);
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mouseMovePageIndex = -1;
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}
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protected override void OnControlRemoved(ControlEventArgs e)
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{
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base.OnControlRemoved(e);
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mouseMovePageIndex = -1;
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}
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}
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}
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