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KenjiTab.cs
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KenjiTab.cs
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using System;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace UyghurEditPP
{
public delegate void delgRemoveTab(int TabIndex);
public class KenjiTab : System.Windows.Forms.TabControl
{
private int _hotTabIndex = -1;
public delgRemoveTab RemoveTab=null;
public KenjiTab(): base()
{
this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.UserPaint, true);
}
#region Properties
private int CloseButtonHeight
{
get{ return 14; }
}
private int HotTabIndex
{
get{ return _hotTabIndex; }
set
{
if (_hotTabIndex != value)
{
_hotTabIndex = value;
this.Invalidate();
}
}
}
#endregion
#region Overridden Methods
// protected override void OnCreateControl()
// {
// base.OnCreateControl();
// this.OnFontChanged(EventArgs.Empty);
// }
// protected override void OnFontChanged(EventArgs e)
// {
// base.OnFontChanged(e);
// IntPtr hFont = this.Font.ToHfont();
// SendMessage(this.Handle, WM_SETFONT, hFont, new IntPtr(-1));
// SendMessage(this.Handle, WM_FONTCHANGE, IntPtr.Zero, IntPtr.Zero);
// this.UpdateStyles();
// }
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
TCHITTESTINFO HTI = new TCHITTESTINFO(e.X, e.Y);
HotTabIndex = SendMessage(this.Handle, TCM_HITTEST, IntPtr.Zero, ref HTI);
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
HotTabIndex = -1;
}
protected override void OnPaintBackground(PaintEventArgs pevent)
{
base.OnPaintBackground(pevent);
for (int id = 0; id < this.TabCount; id++)
DrawTabBackground(pevent.Graphics, id);
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
for (int id = 0; id < this.TabCount; id++)
DrawTabContent(e.Graphics, id);
}
protected override void WndProc(ref Message m)
{
if (m.Msg == TCM_SETPADDING)
m.LParam = MAKELPARAM(this.Padding.X + CloseButtonHeight / 2, this.Padding.Y);
if (m.Msg == WM_MOUSEDOWN && !this.DesignMode && HotTabIndex>=0)
{
Point pt = this.PointToClient(Cursor.Position);
Rectangle closeRect = GetCloseButtonRect(HotTabIndex);
if (closeRect.Contains(pt))
{
//TabPages.RemoveAt(HotTabIndex);
//m.Msg = WM_NULL;
if(RemoveTab!=null){
RemoveTab(HotTabIndex);
}
}
}
base.WndProc(ref m);
}
#endregion
#region Private Methods
private IntPtr MAKELPARAM(int lo, int hi)
{
return new IntPtr((hi << 16) | (lo & 0xFFFF));
}
private void DrawTabBackground(Graphics graphics, int id)
{
if (id == SelectedIndex){
graphics.FillRectangle(Brushes.White, GetTabRect(id));
}
else if (id == HotTabIndex)
{
Rectangle rc = GetTabRect(id);
rc.Width--;
rc.Height--;
graphics.DrawRectangle(Pens.DarkGray, rc);
}
}
private void DrawTabContent(Graphics graphics, int id)
{
bool selectedOrHot = id == this.SelectedIndex || id == this.HotTabIndex;
bool vertical = this.Alignment >= TabAlignment.Left;
Image tabImage = null;
if (this.ImageList != null)
{
TabPage page = this.TabPages[id];
if (page.ImageIndex > -1 && page.ImageIndex < this.ImageList.Images.Count)
tabImage = this.ImageList.Images[page.ImageIndex];
if (page.ImageKey.Length > 0 && this.ImageList.Images.ContainsKey(page.ImageKey))
tabImage = this.ImageList.Images[page.ImageKey];
}
Rectangle tabRect = GetTabRect(id);
Rectangle contentRect = vertical ? new Rectangle(0, 0, tabRect.Height, tabRect.Width) : new Rectangle(Point.Empty, tabRect.Size);
Rectangle textrect = contentRect;
textrect.Width -= FontHeight;
if (tabImage != null)
{
textrect.Width -= tabImage.Width;
textrect.X += tabImage.Width;
}
Color frColor = id == SelectedIndex ? Color.Black : this.ForeColor;
Color bkColor = id == SelectedIndex ? Color.White : this.BackColor;
using (Bitmap bm = new Bitmap(contentRect.Width, contentRect.Height))
{
using (Graphics bmGraphics = Graphics.FromImage(bm))
{
TextRenderer.DrawText(bmGraphics, this.TabPages[id].Text, this.Font, textrect, frColor, bkColor);
if (selectedOrHot)
{
Rectangle closeRect = new Rectangle(contentRect.Right - CloseButtonHeight, 0, CloseButtonHeight, CloseButtonHeight);
closeRect.Offset(-2, (contentRect.Height - closeRect.Height) / 2);
DrawCloseButton(bmGraphics, closeRect);
}
if (tabImage != null)
{
Rectangle imageRect = new Rectangle(Padding.X, 0, tabImage.Width, tabImage.Height);
imageRect.Offset(0, (contentRect.Height - imageRect.Height) / 2);
bmGraphics.DrawImage(tabImage, imageRect);
}
}
graphics.DrawImage(bm, tabRect);
}
}
private void DrawCloseButton(Graphics graphics, Rectangle bounds)
{
graphics.FillRectangle(Brushes.Red, bounds);
using (Font closeFont = new Font("Tahoma", 9, FontStyle.Bold))
TextRenderer.DrawText(graphics, "X", closeFont, bounds, Color.White, Color.Red, TextFormatFlags.HorizontalCenter | TextFormatFlags.NoPadding | TextFormatFlags.SingleLine | TextFormatFlags.VerticalCenter);
}
private Rectangle GetCloseButtonRect(int id)
{
Rectangle tabRect = GetTabRect(id);
Rectangle closeRect = new Rectangle(tabRect.Left, tabRect.Top, CloseButtonHeight, CloseButtonHeight);
switch (Alignment)
{
case TabAlignment.Left:
closeRect.Offset((tabRect.Width - closeRect.Width) / 2, 0);
break;
case TabAlignment.Right:
closeRect.Offset((tabRect.Width - closeRect.Width) / 2, tabRect.Height - closeRect.Height);
break;
default:
closeRect.Offset(tabRect.Width - closeRect.Width, (tabRect.Height - closeRect.Height) / 2);
break;
}
return closeRect;
}
#endregion
#region Interop
[DllImport("user32.dll")]
private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll")]
private static extern int SendMessage(IntPtr hwnd, int msg, IntPtr wParam, ref TCHITTESTINFO lParam);
[StructLayout(LayoutKind.Sequential)]
private struct TCHITTESTINFO
{
public Point pt;
public TCHITTESTFLAGS flags;
public TCHITTESTINFO(int x, int y)
{
pt = new Point(x, y);
flags = TCHITTESTFLAGS.TCHT_NOWHERE;
}
}
[Flags()]
private enum TCHITTESTFLAGS
{
TCHT_NOWHERE = 1,
TCHT_ONITEMICON = 2,
TCHT_ONITEMLABEL = 4,
TCHT_ONITEM = TCHT_ONITEMICON | TCHT_ONITEMLABEL
}
private const int WM_NULL = 0x0;
private const int WM_SETFONT = 0x30;
private const int WM_FONTCHANGE = 0x1D;
private const int WM_MOUSEDOWN = 0x201;
private const int TCM_FIRST = 0x1300;
private const int TCM_HITTEST = TCM_FIRST + 13;
private const int TCM_SETPADDING = TCM_FIRST + 43;
#endregion
}
class MyRenderer : ToolStripProfessionalRenderer
{
protected override void OnRenderButtonBackground(ToolStripItemRenderEventArgs e)
{
var btn = e.Item as ToolStripButton;
if (btn != null && btn.CheckOnClick && btn.Checked)
{
Rectangle bounds = new Rectangle(Point.Empty, e.Item.Size);
Color c = Color.FromArgb(0, 147, 230); //Your custom color here
var brush = new SolidBrush(c);
e.Graphics.FillRectangle(brush, bounds);
}
else base.OnRenderButtonBackground(e);
}
}
}