protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case NativeMethods.WM_PAINT:
if (!_bPainting)
{
NativeMethods1.PAINTSTRUCT ps =
new NativeMethods1.PAINTSTRUCT();
_bPainting = true;
NativeMethods1.BeginPaint(m.HWnd, ref ps);
DrawUpDownButton();
NativeMethods1.EndPaint(m.HWnd, ref ps);
_bPainting = false;
m.Result = NativeMethods1.TRUE;
}
else
{
base.WndProc(ref m);
}
break;
default:
base.WndProc(ref m);
break;
}
}
private IntPtr FindUpDownButton()
{
return(NativeMethods1.FindWindowEx(
base.Handle,
IntPtr.Zero,
UpDownButtonClassName,
null));
}
private bool LeftKeyPressed()
{
if (SystemInformation.MouseButtonsSwapped)
{
return(NativeMethods1.GetKeyState(NativeMethods1.VK_RBUTTON) < 0);
}
else
{
return(NativeMethods1.GetKeyState(NativeMethods1.VK_LBUTTON) < 0);
}
}
private void DrawUpDownButton()
{
bool mouseOver = false;
bool mousePress = LeftKeyPressed();
bool mouseInUpButton = false;
NativeMethods1.RECT rect = new NativeMethods1.RECT();
NativeMethods1.GetClientRect(base.Handle, ref rect);
Rectangle clipRect = Rectangle.FromLTRB(
rect.Top, rect.Left, rect.Right, rect.Bottom);
Point cursorPoint = new Point();
NativeMethods1.GetCursorPos(ref cursorPoint);
NativeMethods1.GetWindowRect(base.Handle, ref rect);
mouseOver = NativeMethods1.PtInRect(ref rect, cursorPoint);
cursorPoint.X -= rect.Left;
cursorPoint.Y -= rect.Top;
mouseInUpButton = cursorPoint.X < clipRect.Width / 2;
using (Graphics g = Graphics.FromHwnd(base.Handle))
{
UpDownButtonPaintEventArgs e =
new UpDownButtonPaintEventArgs(
g,
clipRect,
mouseOver,
mousePress,
mouseInUpButton);
_owner.OnPaintUpDownButton(e);
}
}
private void DrawBorder(Graphics g)
{
if (SelectedIndex != -1)
{
Rectangle tabRect = GetTabRect(SelectedIndex);
Rectangle clipRect = ClientRectangle;
Point[] points = new Point[6];
IntPtr upDownButtonHandle = UpDownButtonHandle;
bool hasUpDown = upDownButtonHandle != IntPtr.Zero;
if (hasUpDown)
{
if (NativeMethods1.IsWindowVisible(upDownButtonHandle))
{
NativeMethods1.RECT upDownButtonRect = new NativeMethods1.RECT();
NativeMethods1.GetWindowRect(
upDownButtonHandle,
ref upDownButtonRect);
Rectangle upDownRect = Rectangle.FromLTRB(
upDownButtonRect.Left,
upDownButtonRect.Top,
upDownButtonRect.Right,
upDownButtonRect.Bottom);
upDownRect = RectangleToClient(upDownRect);
tabRect.X = tabRect.X > upDownRect.X ?
upDownRect.X : tabRect.X;
tabRect.Width = tabRect.Right > upDownRect.X ?
upDownRect.X - tabRect.X : tabRect.Width;
}
}
switch (Alignment)
{
case TabAlignment.Top:
points[0] = new Point(
tabRect.X,
tabRect.Bottom);
points[1] = new Point(
clipRect.X,
tabRect.Bottom);
points[2] = new Point(
clipRect.X,
clipRect.Bottom - 1);
points[3] = new Point(
clipRect.Right - 1,
clipRect.Bottom - 1);
points[4] = new Point(
clipRect.Right - 1,
tabRect.Bottom);
points[5] = new Point(
tabRect.Right,
tabRect.Bottom);
break;
case TabAlignment.Bottom:
points[0] = new Point(
tabRect.X,
tabRect.Y);
points[1] = new Point(
clipRect.X,
tabRect.Y);
points[2] = new Point(
clipRect.X,
clipRect.Y);
points[3] = new Point(
clipRect.Right - 1,
clipRect.Y);
points[4] = new Point(
clipRect.Right - 1,
tabRect.Y);
points[5] = new Point(
tabRect.Right,
tabRect.Y);
break;
case TabAlignment.Left:
points[0] = new Point(
tabRect.Right,
tabRect.Y);
points[1] = new Point(
tabRect.Right,
clipRect.Y);
points[2] = new Point(
clipRect.Right - 1,
clipRect.Y);
points[3] = new Point(
clipRect.Right - 1,
clipRect.Bottom - 1);
points[4] = new Point(
tabRect.Right,
clipRect.Bottom - 1);
points[5] = new Point(
tabRect.Right,
tabRect.Bottom);
break;
case TabAlignment.Right:
points[0] = new Point(
tabRect.X,
tabRect.Y);
points[1] = new Point(
tabRect.X,
clipRect.Y);
points[2] = new Point(
clipRect.X,
clipRect.Y);
points[3] = new Point(
clipRect.X,
clipRect.Bottom - 1);
points[4] = new Point(
tabRect.X,
clipRect.Bottom - 1);
points[5] = new Point(
tabRect.X,
tabRect.Bottom);
break;
}
using (Pen pen = new Pen(_borderColor))
{
g.DrawLines(pen, points);
}
}
}
private void DrawTabPages(Graphics g)
{
Rectangle tabRect;
Point cusorPoint = PointToClient(MousePosition);
bool hover;
bool selected;
bool hasSetClip = false;
bool alignHorizontal =
(Alignment == TabAlignment.Top ||
Alignment == TabAlignment.Bottom);
LinearGradientMode mode = alignHorizontal ?
LinearGradientMode.Vertical : LinearGradientMode.Horizontal;
if (alignHorizontal)
{
IntPtr upDownButtonHandle = UpDownButtonHandle;
bool hasUpDown = upDownButtonHandle != IntPtr.Zero;
if (hasUpDown)
{
if (NativeMethods1.IsWindowVisible(upDownButtonHandle))
{
NativeMethods1.RECT upDownButtonRect = new NativeMethods1.RECT();
NativeMethods1.GetWindowRect(
upDownButtonHandle, ref upDownButtonRect);
Rectangle upDownRect = Rectangle.FromLTRB(
upDownButtonRect.Left,
upDownButtonRect.Top,
upDownButtonRect.Right,
upDownButtonRect.Bottom);
upDownRect = RectangleToClient(upDownRect);
switch (Alignment)
{
case TabAlignment.Top:
upDownRect.Y = 0;
break;
case TabAlignment.Bottom:
upDownRect.Y =
ClientRectangle.Height - DisplayRectangle.Height;
break;
}
upDownRect.Height = ClientRectangle.Height;
g.SetClip(upDownRect, CombineMode.Exclude);
hasSetClip = true;
}
}
}
for (int index = 0; index < base.TabCount; index++)
{
TabPage page = TabPages[index];
tabRect = GetTabRect(index);
hover = tabRect.Contains(cusorPoint);
selected = SelectedIndex == index;
Color baseColor = _baseColor;
Color borderColor = _borderColor;
if (selected)
{
baseColor = GetColor(_baseColor, 0, -45, -30, -14);
}
else if (hover)
{
baseColor = GetColor(_baseColor, 0, 35, 24, 9);
}
RenderTabBackgroundInternal(
g,
tabRect,
baseColor,
borderColor,
.45F,
mode);
bool hasImage = DrawTabImage(g, page, tabRect);
DrawtabText(g, page, tabRect, hasImage);
}
if (hasSetClip)
{
g.ResetClip();
}
}