winform 自定义布局器实现对默认布局器dock的改善qq48238667的博客-

winform中带有默认布局器Dock可以对控件进行简单的布局，但是，在布局过程中，控件的布局效果与控件的添加顺序有着密切的关系。
先添加button1（left），再添加button2（fill）
先添加button1（fill），再添加button2（left）
可见布局效果存在巨大差异，这就使得Dock布局器只适合进行简单的布局，在这里介绍一种布局器，可以消除布局顺序对布局效果的影响，同时可以自己进行四角的设定。

代码实现如下

 public class DockLayout : Panel { // 左、上、右、下 private int[] dockFlags = new int[8]; protected override void OnLayout(LayoutEventArgs levent) { base.OnLayout(levent); int w = this.Width; int h = this.Height; // 考虑容器本身的 Padding Padding pad = this.Padding;             w -= (pad.Left + pad.Right);             h -= (pad.Top + pad.Bottom); DockControl dcTop = new DockControl(); DockControl dcRight = new DockControl(); DockControl dcBottom = new DockControl(); DockControl dcLeft = new DockControl(); Control center = null; // 中央控件 // 判断4个边的宽度 foreach (Control c in this.Controls) { Padding m = c.Margin; // 须考虑Margin设置 // 左 if (c.Dock == DockStyle.Left && c.Visible) { DockControl dc = dcLeft; ;                     dc.c = c;                     dc.size = c.Width;                     dc.size += (m.Left + m.Right);                     dc.flag1 = dockFlags[0];                     dc.flag2 = dockFlags[1]; } if (c.Dock == DockStyle.Top && c.Visible) { DockControl dc = dcTop; ;                     dc.c = c;                     dc.size = c.Height;                     dc.size += (m.Top + m.Bottom);                     dc.flag1 = dockFlags[2];                     dc.flag2 = dockFlags[3]; } if (c.Dock == DockStyle.Right && c.Visible) { DockControl dc = dcRight; ;                     dc.c = c;                     dc.size = c.Width;                     dc.size += (m.Left + m.Right);                     dc.flag1 = dockFlags[4];                     dc.flag2 = dockFlags[5]; } if (c.Dock == DockStyle.Bottom && c.Visible) { DockControl dc = dcBottom; ;                     dc.c = c;                     dc.size = c.Height;                     dc.size += (m.Top + m.Bottom);                     dc.flag1 = dockFlags[6];                     dc.flag2 = dockFlags[7]; } if (c.Dock == DockStyle.Fill && c.Visible) {                     center = c; } } // 依次布局 if (dcLeft.c != null) { DockControl dc = dcLeft; int x1 = 0, y1 = 0; int x2 = dc.size, y2 = h; if (dc.flag1 == 0)                     y1 += dcTop.size; if (dc.flag2 == 0)                     y2 -= dcBottom.size; SetSizeLocation(dc.c, x1, y1, x2, y2); } if (dcTop.c != null) { DockControl dc = dcTop; int x1 = 0, y1 = 0; int x2 = w, y2 = dc.size; if (dc.flag1 == 0)                     x1 += dcLeft.size; if (dc.flag2 == 0)                     x2 -= dcRight.size; SetSizeLocation(dc.c, x1, y1, x2, y2); } if (dcRight.c != null) { DockControl dc = dcRight; int x1 = w - dc.size, y1 = 0; int x2 = w, y2 = h; if (dc.flag1 == 0)                     y1 += dcTop.size; if (dc.flag2 == 0)                     y2 -= dcBottom.size; SetSizeLocation(dc.c, x1, y1, x2, y2); } if (dcBottom.c != null) { DockControl dc = dcBottom; int x1 = 0, y1 = h - dc.size; int x2 = w, y2 = h; if (dc.flag1 == 0)                     x1 += dcLeft.size; if (dc.flag2 == 0)                     x2 -= dcRight.size; SetSizeLocation(dc.c, x1, y1, x2, y2); } if (center != null) { int x1 = dcLeft.size, y1 = dcTop.size; int x2 = w - dcRight.size, y2 = h - dcBottom.size; SetSizeLocation(center, x1, y1, x2, y2); //Console.WriteLine("center{0},{1},{2},{3}", x1, y1, x2, y2); } } public void SetSizeLocation(Control c, int x1, int y1, int x2, int y2) { // 控件的布局尺寸 (包含了控件的Margin) int width = x2 - x1, height = y2 - y1; // 容器本身的 Padding Padding pad = this.Padding;             x1 += pad.Left;             y1 += pad.Top; // 考虑控件本身的 Margin Padding margin = c.Margin;             x1 += margin.Left;             y1 += margin.Top;             width -= (margin.Left + margin.Right);             height -= (margin.Top + margin.Bottom);              c.Location = new Point(x1, y1);             c.Size = new Size(width, height); } public class DockControl { public Control c; public int size; public int flag1 = 0; // 1占据 0 退让 public int flag2 = 0; } [Browsable(true)] [Editor(typeof(DockFlagEditorType), typeof(UITypeEditor))] public int[] DockFlags         { get { return dockFlags; } set { this.dockFlags = value; PerformLayout(); } } } /// <summary> /// 按照Winform框架的要求，定义一个属性编辑器器 /// </summary> class DockFlagEditorType : UITypeEditor { public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value) { IWindowsFormsEditorService editorService = null; if (context != null && context.Instance != null && provider != null) {                 editorService = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService)); if (editorService != null) { // 自定义控件 DockLayout owner = (DockLayout)context.Instance; DockFlagEditor editorUi = new DockFlagEditor();                     editorUi.SetValue(owner.DockFlags); //editorUi.Size = editorUi.grid.PreferredSize; // 显示 （阻塞方式，直到界面关闭)                     editorService.DropDownControl(editorUi); // 新的值 int[] newValue = editorUi.GetValue(); //owner.Partition = newPartition; return newValue; } } return value; } public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context) { return UITypeEditorEditStyle.DropDown; } } /// <summary> /// 定义一个编辑器，将出现在属性面板里 /// </summary> [ToolboxItem(false)] class DockFlagEditor : UserControl { private DataGridViewTextBoxColumn Column1; private DataGridViewTextBoxColumn Column2; private DataGridViewTextBoxColumn Column3; public DataGridView grid; private static string T = "✔"; private static string F = "☐"; public DockFlagEditor() { InitializeComponent();              grid.Rows.Add(new object[] { "左 Left", F, F });             grid.Rows.Add(new object[] { "上 Top", F, F });             grid.Rows.Add(new object[] { "右 Right", F, F });             grid.Rows.Add(new object[] { "下 Bottom", F, F }); } private void InitializeComponent() { System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle4 = new System.Windows.Forms.DataGridViewCellStyle(); System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle5 = new System.Windows.Forms.DataGridViewCellStyle(); System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle6 = new System.Windows.Forms.DataGridViewCellStyle(); this.grid = new System.Windows.Forms.DataGridView(); this.Column1 = new System.Windows.Forms.DataGridViewTextBoxColumn(); this.Column2 = new System.Windows.Forms.DataGridViewTextBoxColumn(); this.Column3 = new System.Windows.Forms.DataGridViewTextBoxColumn(); ((System.ComponentModel.ISupportInitialize)(this.grid)).BeginInit(); this.SuspendLayout(); //  // grid //  this.grid.AllowUserToAddRows = false; this.grid.AllowUserToDeleteRows = false; this.grid.AllowUserToResizeColumns = false; this.grid.AllowUserToResizeRows = false; this.grid.AutoSizeRowsMode = System.Windows.Forms.DataGridViewAutoSizeRowsMode.DisplayedCells; this.grid.BackgroundColor = System.Drawing.Color.FromArgb(((int)(((byte)(252)))), ((int)(((byte)(252)))), ((int)(((byte)(252))))); this.grid.BorderStyle = System.Windows.Forms.BorderStyle.None; this.grid.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize; this.grid.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] { this.Column1, this.Column2, this.Column3}); this.grid.Dock = System.Windows.Forms.DockStyle.Fill; this.grid.Location = new System.Drawing.Point(3, 3); this.grid.Name = "grid"; this.grid.ReadOnly = true; this.grid.RowHeadersVisible = false; this.grid.RowTemplate.Height = 23; this.grid.Size = new System.Drawing.Size(225, 120); this.grid.TabIndex = 0; this.grid.CellClick += new System.Windows.Forms.DataGridViewCellEventHandler(this.grid_CellClick); //  // Column1 //              dataGridViewCellStyle4.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(252)))), ((int)(((byte)(252)))), ((int)(((byte)(252))))); this.Column1.DefaultCellStyle = dataGridViewCellStyle4; this.Column1.HeaderText = "方位"; this.Column1.Name = "Column1"; this.Column1.ReadOnly = true; this.Column1.SortMode = System.Windows.Forms.DataGridViewColumnSortMode.NotSortable; this.Column1.Width = 80; //  // Column2 //  this.Column2.AutoSizeMode = System.Windows.Forms.DataGridViewAutoSizeColumnMode.Fill;             dataGridViewCellStyle5.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleCenter; this.Column2.DefaultCellStyle = dataGridViewCellStyle5; this.Column2.FillWeight = 50F; this.Column2.HeaderText = "Flag1"; this.Column2.Name = "Column2"; this.Column2.ReadOnly = true; this.Column2.Resizable = System.Windows.Forms.DataGridViewTriState.True; this.Column2.SortMode = System.Windows.Forms.DataGridViewColumnSortMode.NotSortable; //  // Column3 //  this.Column3.AutoSizeMode = System.Windows.Forms.DataGridViewAutoSizeColumnMode.Fill;             dataGridViewCellStyle6.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleCenter; this.Column3.DefaultCellStyle = dataGridViewCellStyle6; this.Column3.FillWeight = 50F; this.Column3.HeaderText = "Flag2"; this.Column3.Name = "Column3"; this.Column3.ReadOnly = true; this.Column3.Resizable = System.Windows.Forms.DataGridViewTriState.True; this.Column3.SortMode = System.Windows.Forms.DataGridViewColumnSortMode.NotSortable; //  // AfDockFlagEditor //  this.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(252)))), ((int)(((byte)(252)))), ((int)(((byte)(252))))); this.Controls.Add(this.grid); this.Name = "AfDockFlagEditor"; this.Padding = new System.Windows.Forms.Padding(3); this.Size = new System.Drawing.Size(231, 126); ((System.ComponentModel.ISupportInitialize)(this.grid)).EndInit(); this.ResumeLayout(false); } private bool IsTrue(string value) { return value.Equals(T); } private bool Cell(int col, int row) { return IsTrue((string)grid[col, row].Value); } public void Cell(int col, int row, bool value) {             grid[col, row].Value = value ? T : F; } public void SetValue(int[] flags) { Cell(1, 0, flags[0] > 0); Cell(2, 0, flags[1] > 0); Cell(1, 1, flags[2] > 0); Cell(2, 1, flags[3] > 0); Cell(1, 2, flags[4] > 0); Cell(2, 2, flags[5] > 0); Cell(1, 3, flags[6] > 0); Cell(2, 3, flags[7] > 0); } public int[] GetValue() { int[] flags = new int[8];             flags[0] = Cell(1, 0) ? 1 : 0;             flags[1] = Cell(2, 0) ? 1 : 0;             flags[2] = Cell(1, 1) ? 1 : 0;             flags[3] = Cell(2, 1) ? 1 : 0;             flags[4] = Cell(1, 2) ? 1 : 0;             flags[5] = Cell(2, 2) ? 1 : 0;             flags[6] = Cell(1, 3) ? 1 : 0;             flags[7] = Cell(2, 3) ? 1 : 0; return flags; } private void grid_CellClick(object sender, DataGridViewCellEventArgs e) { int row = e.RowIndex, col = e.ColumnIndex; if (col == 0) return; bool value = Cell(col, row);             Console.WriteLine("click at: {0},{1} value={2}", row, col, value);              grid[col, row].Value = value ? F : T; if (!value) { CheckOnEdit(row, col, value); } } // 左上 grid[1,0]  左下 grid[2,0] // 上左 grid[1,1]  上右 grid[2,1] // 右上 grid[1,2]  右下 grid[2,2] // 下左 grid[1,3]  下右 grid[2,3] private void CheckOnEdit(int row, int col, bool value) { if (row == 0) // 左 { if (col == 1) Cell(1, 1, false); if (col == 2) Cell(1, 3, false); } if (row == 1) // 上 { if (col == 1) Cell(1, 0, false); if (col == 2) Cell(1, 2, false); } if (row == 2) // 右 { if (col == 1) Cell(2, 1, false); if (col == 2) Cell(2, 3, false); } if (row == 3) // 下 { if (col == 1) Cell(2, 0, false); if (col == 2) Cell(2, 2, false); } } }