using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Windows.Forms;
using System.Drawing;
using System.Windows.Forms.VisualStyles;
using System.Drawing.Imaging;
namespace Aga.Controls.Tree{
[TypeConverter(typeof(TreeColumn.TreeColumnConverter)), DesignTimeVisible(false), ToolboxItem(false)]
public class TreeColumn : Component
{
private class TreeColumnConverter : ComponentConverter
{
public TreeColumnConverter()
: base(typeof(TreeColumn))
{
}
public override bool GetPropertiesSupported(ITypeDescriptorContext context)
{
return false;
}
}
private const int HeaderLeftMargin = 5;
private const int HeaderRightMargin = 5;
private const int SortOrderMarkMargin = 8;
private TextFormatFlags _headerFlags;
private TextFormatFlags _baseHeaderFlags = TextFormatFlags.NoPadding |
TextFormatFlags.EndEllipsis |
TextFormatFlags.VerticalCenter |
TextFormatFlags.PreserveGraphicsTranslateTransform;
#region Properties
private TreeColumnCollection _owner;
internal TreeColumnCollection Owner
{
get { return _owner; }
set { _owner = value; }
}
[Browsable(false)]
public int Index
{
get
{
if (Owner != null)
return Owner.IndexOf(this);
else
return -1;
}
}
private string _header;
[Localizable(true)]
public string Header
{
get { return _header; }
set
{
_header = value;
OnHeaderChanged();
}
}
private string _tooltipText;
[Localizable(true)]
public string TooltipText
{
get { return _tooltipText; }
set { _tooltipText = value; }
}
private int _width;
[DefaultValue(50), Localizable(true)]
public int Width
{
get
{
return _width;
}
set
{
if (_width != value)
{
_width = Math.Max(MinColumnWidth, value);
if (_maxColumnWidth > 0)
{
_width = Math.Min(_width, MaxColumnWidth);
}
OnWidthChanged();
}
}
}
private int _minColumnWidth;
[DefaultValue(0)]
public int MinColumnWidth
{
get { return _minColumnWidth; }
set
{
if (value < 0)
throw new ArgumentOutOfRangeException("value");
_minColumnWidth = value;
Width = Math.Max(value, Width);
}
}
private int _maxColumnWidth;
[DefaultValue(0)]
public int MaxColumnWidth
{
get { return _maxColumnWidth; }
set
{
if (value < 0)
throw new ArgumentOutOfRangeException("value");
_maxColumnWidth = value;
if (value > 0)
Width = Math.Min(value, _width);
}
}
private bool _visible = true;
[DefaultValue(true)]
public bool IsVisible
{
get { return _visible; }
set
{
_visible = value;
OnIsVisibleChanged();
}
}
private HorizontalAlignment _textAlign = HorizontalAlignment.Left;
[DefaultValue(HorizontalAlignment.Left)]
public HorizontalAlignment TextAlign
{
get { return _textAlign; }
set
{
if (value != _textAlign)
{
_textAlign = value;
_headerFlags = _baseHeaderFlags | TextHelper.TranslateAligmentToFlag(value);
OnHeaderChanged();
}
}
}
private bool _sortable = false;
[DefaultValue(false)]
public bool Sortable
{
get { return _sortable; }
set { _sortable = value; }
}
private SortOrder _sort_order = SortOrder.None;
public SortOrder SortOrder
{
get { return _sort_order; }
set
{
if (value == _sort_order)
return;
_sort_order = value;
OnSortOrderChanged();
}
}
public Size SortMarkSize
{
get
{
if (Application.RenderWithVisualStyles)
return new Size(9, 5);
else
return new Size(7, 4);
}
}
#endregion
public TreeColumn():
this(string.Empty, 50)
{
}
public TreeColumn(string header, int width)
{
_header = header;
_width = width;
_headerFlags = _baseHeaderFlags | TextFormatFlags.Left;
}
public override string ToString()
{
if (string.IsNullOrEmpty(Header))
return GetType().Name;
else
return Header;
}
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
}
#region Draw
private static VisualStyleRenderer _normalRenderer;
private static VisualStyleRenderer _pressedRenderer;
private static VisualStyleRenderer _hotRenderer;
private static void CreateRenderers()
{
if (Application.RenderWithVisualStyles && _normalRenderer == null)
{
_normalRenderer = new VisualStyleRenderer(VisualStyleElement.Header.Item.Normal);
_pressedRenderer = new VisualStyleRenderer(VisualStyleElement.Header.Item.Pressed);
_hotRenderer = new VisualStyleRenderer(VisualStyleElement.Header.Item.Hot);
}
}
internal Bitmap CreateGhostImage(Rectangle bounds, Font font)
{
Bitmap b = new Bitmap(bounds.Width, bounds.Height, PixelFormat.Format32bppArgb);
Graphics gr = Graphics.FromImage(b);
gr.FillRectangle(SystemBrushes.ControlDark, bounds);
DrawContent(gr, bounds, font);
BitmapHelper.SetAlphaChanelValue(b, 150);
return b;
}
internal void Draw(Graphics gr, Rectangle bounds, Font font, bool pressed, bool hot)
{
DrawBackground(gr, bounds, pressed, hot);
DrawContent(gr, bounds, font);
}
private void DrawContent(Graphics gr, Rectangle bounds, Font font)
{
Rectangle innerBounds = new Rectangle(bounds.X + HeaderLeftMargin, bounds.Y,
bounds.Width - HeaderLeftMargin - HeaderRightMargin,
bounds.Height);
if (SortOrder != SortOrder.None)
innerBounds.Width -= (SortMarkSize.Width + SortOrderMarkMargin);
Size maxTextSize = TextRenderer.MeasureText(gr, Header, font, innerBounds.Size, TextFormatFlags.NoPadding);
Size textSize = TextRenderer.MeasureText(gr, Header, font, innerBounds.Size, _baseHeaderFlags);
if (SortOrder != SortOrder.None)
{
int tw = Math.Min(textSize.Width, innerBounds.Size.Width);
int x = 0;
if (TextAlign == HorizontalAlignment.Left)
x = innerBounds.X + tw + SortOrderMarkMargin;
else if (TextAlign == HorizontalAlignment.Right)
x = innerBounds.Right + SortOrderMarkMargin;
else
x = innerBounds.X + tw + (innerBounds.Width - tw) / 2 + SortOrderMarkMargin;
DrawSortMark(gr, bounds, x);
}
if (textSize.Width < maxTextSize.Width)
TextRenderer.DrawText(gr, Header, font, innerBounds, SystemColors.ControlText, _baseHeaderFlags | TextFormatFlags.Left);
else
TextRenderer.DrawText(gr, Header, font, innerBounds, SystemColors.ControlText, _headerFlags);
}
private void DrawSortMark(Graphics gr, Rectangle bounds, int x)
{
int y = bounds.Y + bounds.Height / 2 - 2;
x = Math.Max(x, bounds.X + SortOrderMarkMargin);
int w2 = SortMarkSize.Width / 2;
if (SortOrder == SortOrder.Ascending)
{
Point[] points = new Point[] { new Point(x, y), new Point(x + SortMarkSize.Width, y), new Point(x + w2, y + SortMarkSize.Height) };
gr.FillPolygon(SystemBrushes.ControlDark, points);
}
else if (SortOrder == SortOrder.Descending)
{
Point[] points = new Point[] { new Point(x - 1, y + SortMarkSize.Height), new Point(x + SortMarkSize.Width, y + SortMarkSize.Height), new Point(x + w2, y - 1) };
gr.FillPolygon(SystemBrushes.ControlDark, points);
}
}
internal static void DrawDropMark(Graphics gr, Rectangle rect)
{
gr.FillRectangle(SystemBrushes.HotTrack, rect.X-1, rect.Y, 2, rect.Height);
}
internal static void DrawBackground(Graphics gr, Rectangle bounds, bool pressed, bool hot)
{
if (Application.RenderWithVisualStyles)
{
CreateRenderers();
if (pressed)
_pressedRenderer.DrawBackground(gr, bounds);
else if (hot)
_hotRenderer.DrawBackground(gr, bounds);
else
_normalRenderer.DrawBackground(gr, bounds);
}
else
{
gr.FillRectangle(SystemBrushes.Control, bounds);
Pen p1 = SystemPens.ControlLightLight;
Pen p2 = SystemPens.ControlDark;
Pen p3 = SystemPens.ControlDarkDark;
if (pressed)
gr.DrawRectangle(p2, bounds.X, bounds.Y, bounds.Width, bounds.Height);
else
{
gr.DrawLine(p1, bounds.X, bounds.Y, bounds.Right, bounds.Y);
gr.DrawLine(p3, bounds.X, bounds.Bottom, bounds.Right, bounds.Bottom);
gr.DrawLine(p3, bounds.Right - 1, bounds.Y, bounds.Right - 1, bounds.Bottom - 1);
gr.DrawLine(p1, bounds.Left, bounds.Y + 1, bounds.Left, bounds.Bottom - 2);
gr.DrawLine(p2, bounds.Right - 2, bounds.Y + 1, bounds.Right - 2, bounds.Bottom - 2);
gr.DrawLine(p2, bounds.X, bounds.Bottom - 1, bounds.Right - 2, bounds.Bottom - 1);
}
}
}
#endregion
#region Events
public event EventHandler HeaderChanged;
private void OnHeaderChanged()
{
if (HeaderChanged != null)
HeaderChanged(this, EventArgs.Empty);
}
public event EventHandler SortOrderChanged;
private void OnSortOrderChanged()
{
if (SortOrderChanged != null)
SortOrderChanged(this, EventArgs.Empty);
}
public event EventHandler IsVisibleChanged;
private void OnIsVisibleChanged()
{
if (IsVisibleChanged != null)
IsVisibleChanged(this, EventArgs.Empty);
}
public event EventHandler WidthChanged;
private void OnWidthChanged()
{
if (WidthChanged != null)
WidthChanged(this, EventArgs.Empty);
}
#endregion
}
}
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