private void DrawUpDownButton()
{
bool mouseOver = false;
bool mousePress = LeftKeyPressed();
bool mouseInUpButton = false;
Rectangle clipRect = _upDownButton.ClientRectangle;
RECT windowRect = new RECT();
Point cursorPoint = new Point();
GetCursorPos(ref cursorPoint);
GetWindowRect(_upDownButtonWnd, ref windowRect);
mouseOver = PtInRect(ref windowRect, cursorPoint);
cursorPoint.X -= windowRect.Left;
cursorPoint.Y -= windowRect.Top;
mouseInUpButton = cursorPoint.Y < clipRect.Height / 2;
using (Graphics g = Graphics.FromHwnd(_upDownButtonWnd))
{
UpDownButtonPaintEventArgs e =
new UpDownButtonPaintEventArgs(
g,
clipRect,
mouseOver,
mousePress,
mouseInUpButton);
_owner.OnPaintUpDownButton(e);
}
}
protected virtual void OnPaintUpDownButton(
UpDownButtonPaintEventArgs e)
{
Graphics g = e.Graphics;
Rectangle rect = e.ClipRectangle;
Color upButtonBaseColor = _baseColor;
Color upButtonBorderColor = _borderColor;
Color upButtonArrowColor = _arrowColor;
Color downButtonBaseColor = _baseColor;
Color downButtonBorderColor = _borderColor;
Color downButtonArrowColor = _arrowColor;
Rectangle upButtonRect = rect;
upButtonRect.Y += 1;
upButtonRect.Width -= 2;
upButtonRect.Height = rect.Height / 2 - 2;
Rectangle downButtonRect = rect;
downButtonRect.Y = upButtonRect.Bottom + 2;
downButtonRect.Height = rect.Height - upButtonRect.Bottom - 4;
downButtonRect.Width -= 2;
if (Enabled)
{
if (e.MouseOver)
{
if (e.MousePress)
{
if (e.MouseInUpButton)
{
upButtonBaseColor = GetColor(_baseColor, 0, -35, -24, -9);
}
else
{
downButtonBaseColor = GetColor(_baseColor, 0, -35, -24, -9);
}
}
else
{
if (e.MouseInUpButton)
{
upButtonBaseColor = GetColor(_baseColor, 0, 35, 24, 9);
}
else
{
downButtonBaseColor = GetColor(_baseColor, 0, 35, 24, 9);
}
}
}
}
else
{
upButtonBaseColor = SystemColors.Control;
upButtonBorderColor = SystemColors.ControlDark;
upButtonArrowColor = SystemColors.ControlDark;
downButtonBaseColor = SystemColors.Control;
downButtonBorderColor = SystemColors.ControlDark;
downButtonArrowColor = SystemColors.ControlDark;
}
g.SmoothingMode = SmoothingMode.AntiAlias;
Color backColor = Enabled ? base.BackColor : SystemColors.Control;
using (SolidBrush brush = new SolidBrush(base.BackColor))
{
rect.Inflate(1, 1);
g.FillRectangle(brush, rect);
}
RenderButton(
g,
upButtonRect,
upButtonBaseColor,
upButtonBorderColor,
upButtonArrowColor,
ArrowDirection.Up);
RenderButton(
g,
downButtonRect,
downButtonBaseColor,
downButtonBorderColor,
downButtonArrowColor,
ArrowDirection.Down);
UpDownButtonPaintEventHandler handler =
base.Events[EventPaintUpDownButton] as UpDownButtonPaintEventHandler;
if (handler != null)
{
handler(this, e);
}
}