private int scUpDown_SubClassedWndProc(ref Message m)
{
switch (m.Msg)
{
case CustomWin32.WM_PAINT:
{
//------------------------
// redraw
IntPtr hDC = CustomWin32.GetWindowDC(scUpDown.Handle);
Graphics g = Graphics.FromHdc(hDC);
DrawIcons(g);
g.Dispose();
CustomWin32.ReleaseDC(scUpDown.Handle, hDC);
//------------------------
// return 0 (processed)
m.Result = IntPtr.Zero;
//------------------------
// validate current rect
Rectangle rect = new Rectangle();
CustomWin32.GetClientRect(scUpDown.Handle, ref rect);
CustomWin32.ValidateRect(scUpDown.Handle, ref rect);
//------------------------
}
return(1);
}
return(0);
}
private void UpdateUpDown()
{
if (bUpDown)
{
if (CustomWin32.IsWindowVisible(scUpDown.Handle))
{
Rectangle rect = new Rectangle();
CustomWin32.GetClientRect(scUpDown.Handle, ref rect);
CustomWin32.InvalidateRect(scUpDown.Handle, ref rect, true);
}
}
}
private void FindUpDown()
{
bool bFound = false;
// find the UpDown control
IntPtr pWnd = CustomWin32.GetWindow(this.Handle, CustomWin32.GW_CHILD);
while (pWnd != IntPtr.Zero)
{
//----------------------------
// Get the window class name
char[] className = new char[33];
int length = CustomWin32.GetClassName(pWnd, className, 32);
string s = new string(className, 0, length);
//----------------------------
if (s == "msctls_updown32")
{
bFound = true;
if (!bUpDown)
{
//----------------------------
// Subclass it
this.scUpDown = new SubClass(pWnd, true);
this.scUpDown.SubClassedWndProc += new SubClass.SubClassWndProcEventHandler(scUpDown_SubClassedWndProc);
//----------------------------
bUpDown = true;
}
break;
}
pWnd = CustomWin32.GetWindow(pWnd, CustomWin32.GW_HWNDNEXT);
}
if ((!bFound) && (bUpDown))
{
bUpDown = false;
}
}
internal void DrawControl(Graphics g)
{
if (!Visible)
{
return;
}
Rectangle TabControlArea = this.ClientRectangle;
Rectangle TabArea = this.DisplayRectangle;
// fill client area
RenderControlBackground(g, TabControlArea);
// draw panel border
int nDelta = SystemInformation.Border3DSize.Width;
TabArea.Inflate(nDelta, nDelta);
//RenderTabPanelBorder(g, TabArea);
// clip region for drawing tabs
Region rsaved = g.Clip;
int nWidth = TabArea.Width + nMargin;
if (bUpDown)
{
// exclude updown control for painting
if (CustomWin32.IsWindowVisible(scUpDown.Handle))
{
Rectangle rupdown = new Rectangle();
CustomWin32.GetWindowRect(scUpDown.Handle, ref rupdown);
Rectangle rupdown2 = this.RectangleToClient(rupdown);
nWidth = rupdown2.X;
}
}
// draw tabs
for (int i = 0; i < this.TabCount; i++)
{
DrawTab(g, this.TabPages[i], i);
}
g.Clip = rsaved;
//----------------------------
//----------------------------
// draw background to cover flat border areas
//覆盖tabpage和控件边框的空隙
//if (this.SelectedTab != null)
//{
// TabPage tabPage = this.SelectedTab;
// Color color = tabPage.BackColor;
// Pen border = new Pen(color);
// TabArea.Offset(1, 1);
// TabArea.Width -= 2;
// TabArea.Height -= 2;
// g.DrawRectangle(border, TabArea);
// TabArea.Width -= 1;
// TabArea.Height -= 1;
// g.DrawRectangle(border, TabArea);
// border.Dispose();
//}
//----------------------------
//如果边框是两条线，则这里就只需要覆盖底线和右边的竖线，根据实际观察得知
//if (this.SelectedTab != null)
//{
// TabPage tabPage = this.SelectedTab;
// Color color = tabPage.BackColor;
// Pen border = new Pen(color);
// g.DrawLine(border, new Point(TabArea.X + 2, TabArea.Bottom - 2)
// , new Point(TabArea.Right - 2, TabArea.Bottom - 2));
// g.DrawLine(border, new Point(TabArea.Right - 2, TabArea.Bottom - 2)
// , new Point(TabArea.Right - 2, TabArea.Y + 2));
// border.Dispose();
//}
}