using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Text;
using System.Windows.Forms;
using System.Windows.Forms.VisualStyles;
using System.Runtime.InteropServices;
namespace CommonTools
{
public class VisualStyleItemBackground // can't find system provided visual style for this.
{
[StructLayout(LayoutKind.Sequential)]
public class RECT
{
public int left;
public int top;
public int right;
public int bottom;
public RECT()
{
}
public RECT(Rectangle r)
{
this.left = r.X;
this.top = r.Y;
this.right = r.Right;
this.bottom = r.Bottom;
}
/*
public COMRECT(int left, int top, int right, int bottom)
{
this.left = left;
this.top = top;
this.right = right;
this.bottom = bottom;
}
public static COMRECT FromXYWH(int x, int y, int width, int height)
{
return new COMRECT(x, y, x + width, y + height);
}
public override string ToString()
{
return string.Concat(new object[] { "Left = ", this.left, " Top ", this.top, " Right = ", this.right, " Bottom = ", this.bottom });
}
* */
}
[DllImport("uxtheme.dll", CharSet=CharSet.Auto)]
public static extern int DrawThemeBackground(IntPtr hTheme, IntPtr hdc, int partId, int stateId, [In] RECT pRect, [In] RECT pClipRect);
[DllImport("uxtheme.dll", CharSet=CharSet.Auto)]
public static extern IntPtr OpenThemeData(IntPtr hwnd, [MarshalAs(UnmanagedType.LPWStr)] string pszClassList);
[DllImport("uxtheme.dll", CharSet=CharSet.Auto)]
public static extern int CloseThemeData(IntPtr hTheme);
//http://www.ookii.org/misc/vsstyle.h
//http://msdn2.microsoft.com/en-us/library/bb773210(VS.85).aspx
enum ITEMSTATES
{
LBPSI_HOT = 1,
LBPSI_HOTSELECTED = 2,
LBPSI_SELECTED = 3,
LBPSI_SELECTEDNOTFOCUS = 4,
};
enum LISTBOXPARTS
{
LBCP_BORDER_HSCROLL = 1,
LBCP_BORDER_HVSCROLL = 2,
LBCP_BORDER_NOSCROLL = 3,
LBCP_BORDER_VSCROLL = 4,
LBCP_ITEM = 5,
};
public enum Style
{
Normal,
Inactive, // when not focused
}
Style m_style;
public VisualStyleItemBackground(Style style)
{
m_style = style;
}
public void DrawBackground(Control owner, Graphics dc, Rectangle r)
{
IntPtr themeHandle = OpenThemeData(owner.Handle, "Explorer");
if (themeHandle != IntPtr.Zero)
{
DrawThemeBackground(themeHandle, dc.GetHdc(), (int)LISTBOXPARTS.LBCP_ITEM, (int)ITEMSTATES.LBPSI_SELECTED, new RECT(r), new RECT(r));
dc.ReleaseHdc();
CloseThemeData(themeHandle);
return;
}
Color selectedColor = Color.FromArgb(150, 220, 250);
if (m_style == Style.Inactive)
selectedColor = Color.FromArgb(217, 217, 217);
Pen pen = new Pen(selectedColor);
GraphicsPath path = new GraphicsPath();
path.AddLine(r.Left + 2, r.Top, r.Right - 2, r.Top);
path.AddLine(r.Right, r.Top + 2, r.Right, r.Bottom - 2);
path.AddLine(r.Right - 2, r.Bottom, r.Left + 2, r.Bottom);
path.AddLine(r.Left, r.Bottom - 2, r.Left, r.Top + 2);
path.CloseFigure();
dc.DrawPath(pen, path);
r.Inflate(-1, -1);
LinearGradientBrush brush = new LinearGradientBrush(r, Color.White, Color.FromArgb(90, selectedColor), 90);
dc.FillRectangle(brush, r);
// for some reason in some cases the 'white' end of the gradient brush is drawn with the starting color
// therefore this redraw of the 'top' line of the rectangle
dc.DrawLine(Pens.White, r.Left + 1, r.Top, r.Right - 1, r.Top);
pen.Dispose();
brush.Dispose();
path.Dispose();
}
}
class TreeListPainter
{
static Pen m_gridLinePen = SystemPens.Control;
public static Pen GridLinePen
{
get { return m_gridLinePen; }
}
}
public class CellPainter
{
protected TreeListView m_owner;
public CellPainter(TreeListView owner)
{
m_owner = owner;
}
public virtual void DrawSelectionBackground(Graphics dc, Rectangle nodeRect, Node node)
{
if (m_owner.NodesSelection.Contains(node) || m_owner.FocusedNode == node)
{
if (!Application.RenderWithVisualStyles)
{
// have to fill the solid background only before the node is painted
dc.FillRectangle(SystemBrushes.FromSystemColor(SystemColors.Highlight), nodeRect);
}
else
{
// have to draw the transparent background after the node is painted
VisualStyleItemBackground.Style style = VisualStyleItemBackground.Style.Normal;
if (m_owner.Focused == false)
style = VisualStyleItemBackground.Style.Inactive;
VisualStyleItemBackground rendere = new VisualStyleItemBackground(style);
rendere.DrawBackground(m_owner, dc, nodeRect);
}
}
if (m_owner.Focused && (m_owner.FocusedNode == node))
{
nodeRect.Height += 1;
nodeRect.Inflate(-1,-1);
ControlPaint.DrawFocusRectangle(dc, nodeRect);
}
}
public virtual void PaintCell(Graphics dc,
Rectangle cellRect,
Node node,
TreeListColumn column,
TreeList.TextFormatting format,
object data)
{
if (format.BackColor != Color.Transparent)
{
Rectangle r = cellRect;
r.X = column.CalculatedRect.X;
r.Width = column.CalculatedRect.Width;
SolidBrush brush = new SolidBrush(format.BackColor);
dc.FillRectangle(brush, r);
brush.Dispose();
}
if (data != null)
{
cellRect = CommonTools.Util.AdjustRectangle(cellRect, format.Padding);
//dc.DrawRectangle(Pens.Black, cellRect);
Color color = format.ForeColor;
if (m_owner.FocusedNode == node && Application.RenderWithVisualStyles == false)
color = SystemColors.HighlightText;
TextFormatFlags flags= TextFormatFlags.EndEllipsis | format.GetFormattingFlags();
TextRenderer.DrawText(dc, data.ToString(), m_owner.Font, cellRect, color, flags);
}
}
public virtual void PaintCellPlusMinus(Graphics dc, Rectangle glyphRect, Node node)
{
if (!Application.RenderWithVisualStyles)
{
return;
}
VisualStyleElement element = VisualStyleElement.TreeView.Glyph.Closed;
if (node.Expanded)
element = VisualStyleElement.TreeView.Glyph.Opened;
if (VisualStyleRenderer.IsElementDefined(element))
{
VisualStyleRenderer renderer = new VisualStyleRenderer(element);
renderer.DrawBackground(dc, glyphRect);
}
}
}
public class ColumnHeaderPainter
{
public virtual void DrawHeaderFiller(Graphics dc, Rectangle r)
{
if (!Application.RenderWithVisualStyles)
{
ControlPaint.DrawButton(dc, r, ButtonState.Flat);
return;
}
VisualStyleElement element = VisualStyleElement.Header.Item.Normal;
if (VisualStyleRenderer.IsElementDefined(element))
{
VisualStyleRenderer renderer = new VisualStyleRenderer(element);
renderer.DrawBackground(dc, r);
}
}
public virtual void DrawHeader(Graphics dc, Rectangle cellRect, TreeListColumn column, TreeList.TextFormatting format, bool isHot)
{
if (!Application.RenderWithVisualStyles)
{
ControlPaint.DrawButton(dc, cellRect, ButtonState.Flat);
return;
}
VisualStyleElement element = VisualStyleElement.Header.Item.Normal;
if (isHot)
element = VisualStyleElement.Header.Item.Hot;
if (VisualStyleRenderer.IsElementDefined(element))
{
VisualStyleRenderer renderer = new VisualStyleRenderer(element);
renderer.DrawBackground(dc, cellRect);
if (format.BackColor != Color.Transparent)
{
SolidBrush brush = new SolidBrush(format.BackColor);
dc.FillRectangle(brush, cellRect);
brush.Dispose();
}
cellRect = CommonTools.Util.AdjustRectangle(cellRect, format.Padding);
//dc.DrawRectangle(Pens.Black, cellRect);
Color color = format.ForeColor;
TextFormatFlags flags= TextFormatFlags.EndEllipsis | format.GetFormattingFlags();
TextRenderer.DrawText(dc, column.Caption, column.Font, cellRect, color, flags);
}
}
public virtual void DrawVerticalGridLines(TreeListColumnCollection columns, Graphics dc, Rectangle r, int hScrollOffset)
{
foreach (TreeListColumn col in columns.VisibleColumns)
{
int rightPos = col.CalculatedRect.Right - hScrollOffset;
if (rightPos < 0)
continue;
dc.DrawLine(TreeListPainter.GridLinePen, rightPos, r.Top, rightPos, r.Bottom);
}
}
}
public class RowPainter
{
public void DrawHeader(Graphics dc, Rectangle r, bool isHot)
{
if (!Application.RenderWithVisualStyles)
{
ControlPaint.DrawButton(dc, r, ButtonState.Flat);
return;
}
VisualStyleElement element = VisualStyleElement.Header.Item.Normal;
if (isHot)
element = VisualStyleElement.Header.Item.Hot;
if (VisualStyleRenderer.IsElementDefined(element))
{
VisualStyleRenderer renderer = new VisualStyleRenderer(element);
renderer.DrawBackground(dc, r);
}
}
public void DrawHorizontalGridLine(Graphics dc, Rectangle r)
{
dc.DrawLine(TreeListPainter.GridLinePen, r.Left, r.Bottom, r.Right, r.Bottom);
}
}
}
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