public static void generateClip(ref Graphics graphics, Rectangle rcItem, ref RenderClip clip)
{
RectangleF rcClip = graphics.ClipBounds;
clip.mOldRgn = new Region(rcClip);
clip.mRgn = new Region(rcItem);
//graphics.IntersectClip(clip.mRgn);
graphics.SetClip(clip.mRgn, CombineMode.Replace);
clip.mGraphics = graphics;
clip.mRectItem = rcItem;
}
public override void doPaint(ref Graphics graphics, ref Bitmap bitmap, Rectangle rectPaint)
{
Rectangle rcTemp;
if (rectPaint.IntersectsWith(mRectItem) == false)
{
return;
}
rcTemp = rectPaint;
rcTemp.Intersect(mRectItem);
RenderClip clip = new RenderClip();
RenderClip.generateClip(ref graphics, rcTemp, ref clip);
base.doPaint(ref graphics, ref bitmap, rectPaint);
if (mItems.Count > 0)
{
Rectangle rc = mRectItem;
int newLeft = rc.Left + mRectInset.Left;
int newRight = rc.Right - mRectInset.Right;
int newTop = rc.Top + mRectInset.Top;
int newBottom = rc.Bottom - mRectInset.Bottom;
rc.X = newLeft;
rc.Width = newRight - newLeft;
rc.Y = newTop;
rc.Height = newBottom - newTop;
// 绘制滚动条
if (mVerticalScrollbar != null && mVerticalScrollbar.isVisible())
{
rc.Width = rc.Right - mVerticalScrollbar.getFixedWidth() - rc.Left;
}
if (mHorizontalScrollbar != null && mHorizontalScrollbar.isVisible())
{
rc.Height = rc.Bottom - mHorizontalScrollbar.getFixedHeight() - rc.Top;
}
// 绘制子控件
if (rectPaint.IntersectsWith(rc) == false)
{
for (int i = mItems.Count - 1; i >= 0; i--)
{
ControlUI item = mItems[i];
if (item.isVisible() == false)
{
continue;
}
if (rectPaint.IntersectsWith(item.getPos()) == false)
{
continue;
}
if (item.isFloat())
{
if (mRectItem.IntersectsWith(item.getPos()) == false)
{
continue;
}
item.doPaint(ref graphics, ref bitmap, rectPaint);
}
}
}
else
{
RenderClip childClip = new RenderClip();
RenderClip.generateClip(ref graphics, rcTemp, ref childClip);
for (int i = mItems.Count - 1; i >= 0; i--)
{
ControlUI item = mItems[i];
if (item.isVisible() == false)
{
continue;
}
if (rectPaint.IntersectsWith(item.getPos()) == false)
{
continue;
}
if (item.isFloat())
{
if (mRectItem.IntersectsWith(item.getPos()) == false)
{
continue;
}
RenderClip.useOldClipBegin(ref graphics, ref childClip);
item.doPaint(ref graphics, ref bitmap, rectPaint);
RenderClip.useOldClipEnd(ref graphics, ref childClip);
}
else
{
if (rc.IntersectsWith(item.getPos()) == false)
{
continue;
}
item.doPaint(ref graphics, ref bitmap, rectPaint);
}
}
}
}
if (mVerticalScrollbar != null &&
mVerticalScrollbar.isVisible())
{
if (rectPaint.IntersectsWith(mVerticalScrollbar.getPos()))
{
mVerticalScrollbar.doPaint(ref graphics, ref bitmap, rectPaint);
}
}
if (mHorizontalScrollbar != null &&
mHorizontalScrollbar.isVisible())
{
if (rectPaint.IntersectsWith(mHorizontalScrollbar.getPos()))
{
mHorizontalScrollbar.doPaint(ref graphics, ref bitmap, rectPaint);
}
}
}
public static void useOldClipEnd(ref Graphics graphics, ref RenderClip clip)
{
graphics.Clip = clip.mRgn;
}
public static void useOldClipBegin(ref Graphics graphics, ref RenderClip clip)
{
graphics.Clip = clip.mOldRgn;
}