protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (base.Panel1Collapsed || base.Panel2Collapsed)
{
return;
}
Graphics g = e.Graphics;
Rectangle rect = base.SplitterRectangle;
bool bHorizontal = base.Orientation == Orientation.Horizontal;
LinearGradientMode gradientMode = bHorizontal ?
LinearGradientMode.Vertical : LinearGradientMode.Horizontal;
using (LinearGradientBrush brush = new LinearGradientBrush(
rect, Color.FromArgb(206, 238, 255),
Color.FromArgb(105, 200, 254), gradientMode))
{
Blend blend = new Blend();
blend.Positions = new float[] { 0f, .5f, 1f };
blend.Factors = new float[] { .5F, 1F, .5F };
brush.Blend = blend;
g.FillRectangle(brush, rect);
}
if (_collapsePanel == CollapsePanel.None)
{
return;
}
Rectangle arrowRect;
Rectangle topLeftRect;
Rectangle bottomRightRect;
CalculateRect(
CollapseRect,
out arrowRect,
out topLeftRect,
out bottomRightRect);
ArrowDirection direction = ArrowDirection.Left;
switch (_collapsePanel)
{
case CollapsePanel.Panel1:
if (bHorizontal)
{
direction =
_spliterPanelState == SpliterPanelState.Collapsed ?
ArrowDirection.Down : ArrowDirection.Up;
}
else
{
direction =
_spliterPanelState == SpliterPanelState.Collapsed ?
ArrowDirection.Right : ArrowDirection.Left;
}
break;
case CollapsePanel.Panel2:
if (bHorizontal)
{
direction =
_spliterPanelState == SpliterPanelState.Collapsed ?
ArrowDirection.Up : ArrowDirection.Down;
}
else
{
direction =
_spliterPanelState == SpliterPanelState.Collapsed ?
ArrowDirection.Left : ArrowDirection.Right;
}
break;
}
Color foreColor = _mouseState == ControlState.Hover ?
Color.FromArgb(21, 66, 139) : Color.FromArgb(80, 136, 228);
using (SmoothingModeGraphics sg = new SmoothingModeGraphics(g))
{
RenderHelper.RenderGrid(g, topLeftRect, new Size(3, 3), foreColor);
RenderHelper.RenderGrid(g, bottomRightRect, new Size(3, 3), foreColor);
using (Brush brush = new SolidBrush(foreColor))
{
RenderHelper.RenderArrowInternal(
g,
arrowRect,
direction,
brush);
}
}
}