DotNet 4.8.1 build of DotNetBar
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324
PROMS/DotNetBar Source Code/AdvTree/ColumnHeaderControl.cs
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324
PROMS/DotNetBar Source Code/AdvTree/ColumnHeaderControl.cs
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using System;
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using System.Text;
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using System.Windows.Forms;
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using System.Drawing;
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using DevComponents.DotNetBar;
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using System.Drawing.Drawing2D;
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using System.Drawing.Text;
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namespace DevComponents.AdvTree
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{
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internal class ColumnHeaderControl : Control
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{
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#region Constructor
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/// <summary>
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/// Initializes a new instance of the ColumnHeaderControl class.
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/// </summary>
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public ColumnHeaderControl()
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{
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this.SetStyle(ControlStyles.UserPaint, true);
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this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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this.SetStyle(ControlStyles.Opaque, true);
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this.SetStyle(ControlStyles.ResizeRedraw, true);
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this.SetStyle(ControlStyles.DoubleBuffer, true);
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this.SetStyle(ControlStyles.Selectable, false);
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this.SetStyle(ControlStyles.StandardDoubleClick | ControlStyles.StandardClick, true);
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}
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#endregion
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#region Internal Implementation
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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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DisplayHelp.FillRectangle(g, this.ClientRectangle, this.BackColor);
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if (_Columns == null)
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{
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return;
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}
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AdvTree tree = GetTree();
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if (tree != null)
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{
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SmoothingMode sm = g.SmoothingMode;
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TextRenderingHint th = g.TextRenderingHint;
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if (tree.AntiAlias)
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{
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g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
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g.TextRenderingHint = DisplayHelp.AntiAliasTextRenderingHint;
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}
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//Creates the drawing matrix with the right zoom;
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if (tree.Zoom != 1)
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{
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System.Drawing.Drawing2D.Matrix mx = GetTranslationMatrix(tree.Zoom);
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//use it for drawing
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g.Transform = mx;
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}
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tree.NodeDisplay.PaintColumnHeaders(_Columns, g, true);
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int columnMoveMarkerIndex = _ColumnMoveMarkerIndex;
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if (columnMoveMarkerIndex >= 0)
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DevComponents.AdvTree.Display.ColumnHeaderDisplay.PaintColumnMoveMarker(g, tree, columnMoveMarkerIndex, _Columns);
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if (tree.AntiAlias)
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{
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g.SmoothingMode = sm;
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g.TextRenderingHint = th;
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}
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}
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base.OnPaint(e);
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}
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private int _ColumnMoveMarkerIndex = -1;
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/// <summary>
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/// Gets or sets the column move marker that marks insertion point for column that is dragged. Marker is drawn before the column specified by this index.
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/// </summary>
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internal int ColumnMoveMarkerIndex
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{
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get { return _ColumnMoveMarkerIndex; }
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set
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{
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_ColumnMoveMarkerIndex = value;
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this.Invalidate();
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}
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}
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/// <summary>
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/// Returns mouse position which is translated if control Zoom is not equal 1
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/// </summary>
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/// <param name="x">X coordinate</param>
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/// <param name="y">Y coordinate</param>
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/// <returns></returns>
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private Point GetLayoutPosition(float zoom, int x, int y)
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{
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if (zoom == 1)
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return new Point(x, y);
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Point[] p = new Point[] { new Point(x, y) };
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using (System.Drawing.Drawing2D.Matrix mx = GetTranslationMatrix(zoom))
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{
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mx.Invert();
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mx.TransformPoints(p);
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}
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return p[0];
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}
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private System.Drawing.Drawing2D.Matrix GetTranslationMatrix(float zoom)
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{
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System.Drawing.Drawing2D.Matrix mx = new System.Drawing.Drawing2D.Matrix(zoom, 0, 0, zoom, 0, 0);
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return mx;
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}
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private AdvTree GetTree()
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{
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return this.Parent as AdvTree;
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}
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private ColumnHeaderCollection _Columns = null;
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/// <summary>
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/// Gets or sets the column header collection to be rendered.
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/// </summary>
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public ColumnHeaderCollection Columns
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{
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get { return _Columns; }
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set { _Columns = value; }
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}
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private Cursor _OldCursor = null;
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private ColumnHeader _MouseOverColumnHeader = null;
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protected override void OnMouseMove(MouseEventArgs e)
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{
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AdvTree tree = GetTree();
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Point p = GetLayoutPosition(tree.Zoom, e.X, e.Y);
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ColumnHeader ch = tree.GetColumnAt(p.X, p.Y, _Columns);
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if (_MouseOverColumnHeader != ch)
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{
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if (_MouseOverColumnHeader != null)
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_MouseOverColumnHeader.InternalMouseLeave(e);
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_MouseOverColumnHeader = ch;
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if (_MouseOverColumnHeader != null)
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{
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_MouseOverColumnHeader.InternalMouseEnter(e);
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Interop.WinApi.ResetHover(this);
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}
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}
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if (ch != null)
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{
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ch.InternalMouseMove(e);
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}
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if (e.Button == MouseButtons.Left && _MouseDownHeader != null && tree.AllowUserToReorderColumns && (Math.Abs(_MouseDownPoint.X-e.X)>1))
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{
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tree.StartColumnReorder(p.X, p.Y);
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return;
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}
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if (tree == null || e.Button != MouseButtons.None || !tree.AllowUserToResizeColumns) return;
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if (tree.CanResizeColumnAt(p.X, p.Y))
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{
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if (_OldCursor == null)
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{
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_OldCursor = this.Cursor;
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this.Cursor = Cursors.VSplit;
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}
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}
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else
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{
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ReleaseCursor();
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}
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base.OnMouseMove(e);
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}
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ColumnHeader _MouseDownHeader = null;
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private Point _MouseDownPoint = Point.Empty;
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protected override void OnMouseDown(MouseEventArgs e)
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{
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AdvTree tree = GetTree();
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Point p = Point.Empty;
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bool canResize = false;
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_MouseDownPoint = e.Location;
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if (tree != null)
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{
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p = GetLayoutPosition(tree.Zoom, e.X, e.Y);
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}
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if (tree != null && tree.AllowUserToResizeColumns && e.Button == MouseButtons.Left)
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canResize = tree.CanResizeColumnAt(p.X, p.Y);
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if (tree != null)
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{
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p = GetLayoutPosition(tree.Zoom, e.X, e.Y);
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ColumnHeader ch = tree.GetColumnAt(p.X, p.Y, _Columns);
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if (ch != null)
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{
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_MouseDownHeader = ch;
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if (!canResize)
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ch.OnMouseDown(e);
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}
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}
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if (tree == null || e.Button != MouseButtons.Left || !tree.AllowUserToResizeColumns) return;
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if (canResize)
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{
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tree.StartColumnResize(p.X, p.Y);
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}
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this.Invalidate();
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base.OnMouseDown(e);
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}
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protected override void OnMouseHover(EventArgs e)
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{
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if (Control.MouseButtons == MouseButtons.None)
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{
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AdvTree tree = GetTree();
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Point p = this.PointToClient(Control.MousePosition);
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p = GetLayoutPosition(tree.Zoom, p.X, p.Y);
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ColumnHeader ch = tree.GetColumnAt(p.X, p.Y, _Columns);
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if (ch != null)
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{
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ch.InternalMouseHover(e);
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}
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}
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base.OnMouseHover(e);
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}
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protected override void OnMouseUp(MouseEventArgs e)
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{
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ReleaseCursor();
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_MouseDownPoint = Point.Empty;
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if (_MouseDownHeader!=null)
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{
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_MouseDownHeader.OnMouseUp(e);
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_MouseDownHeader = null;
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}
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this.Invalidate();
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base.OnMouseUp(e);
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}
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protected override void OnClick(EventArgs e)
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{
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AdvTree tree = GetTree();
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Point p = Point.Empty;
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if (tree != null)
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{
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Point tp = tree.PointToClient(Control.MousePosition);
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p = GetLayoutPosition(tree.Zoom, tp.X, tp.Y);
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ColumnHeader ch = tree.GetColumnAt(p.X, p.Y, _Columns);
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if (ch != null)
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{
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ch.OnClick(e);
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}
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}
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this.Invalidate();
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base.OnClick(e);
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}
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internal DateTime IgnoreDoubleClickTime = DateTime.MinValue;
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protected override void OnDoubleClick(EventArgs e)
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{
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AdvTree tree = GetTree();
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Point p = Point.Empty;
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if (tree != null)
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{
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Point tp = tree.PointToClient(Control.MousePosition);
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p = GetLayoutPosition(tree.Zoom, tp.X, tp.Y);
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ColumnHeader ch = tree.GetColumnAt(p.X, p.Y, _Columns);
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if (ch != null)
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{
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DateTime now = DateTime.Now;
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if (IgnoreDoubleClickTime != DateTime.MinValue && now.Subtract(IgnoreDoubleClickTime).TotalMilliseconds <= SystemInformation.DoubleClickTime)
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{
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IgnoreDoubleClickTime = DateTime.MinValue;
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return;
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}
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IgnoreDoubleClickTime = DateTime.MinValue;
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ch.OnDoubleClick(e);
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}
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}
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this.Invalidate();
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base.OnDoubleClick(e);
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}
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private void ReleaseCursor()
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{
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if (_OldCursor != null)
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{
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this.Cursor = _OldCursor;
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_OldCursor = null;
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}
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}
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protected override void OnMouseLeave(EventArgs e)
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{
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if (_MouseOverColumnHeader != null)
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{
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_MouseOverColumnHeader.InternalMouseLeave(e);
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_MouseOverColumnHeader = null;
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}
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if (Control.MouseButtons != MouseButtons.Left)
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ReleaseCursor();
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base.OnMouseLeave(e);
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}
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#endregion
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}
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}
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