protected void DrawHandle(Graphics canvas, KeyPoint kp, uint index, float size, Color color, Color bordercolor)
{
DrawHandle(canvas, kp.Time, kp.GetValue(index), size, color, bordercolor);
}
// ctrl+左键为在指定折线上添加一个细分，alt+左键为删除当前操作手柄对应的时间点，左键点击操作手柄为选择操作手柄，可以上下移动被选中的手柄
protected override void OnMouseDown(MouseEventArgs e)
{
Focus();
m_X = e.X;
m_Y = e.Y;
if (e.Button == MouseButtons.Left)
{
float size = 6.0f * m_GridScale;
//如果按下ctrl键则视为在所选位置增加节点
if ((Control.ModifierKeys & Keys.Control) == Keys.Control)
{
if (m_Stream == null)
{
return;
}
PointF pt = ScreenToWorld(e.X, e.Y);
m_Stream.AddKeyPoint(pt.X);
Invalidate();
}
if ((Control.ModifierKeys & Keys.Alt) == Keys.Alt)
{
if (m_Stream == null)
{
return;
}
//否则检测是否选中了操作器
for (int j = 0; j < m_Stream.GetStreamCount(); ++j)
{
if (!m_Stream.GetStreamEnable(j))
{
continue;
}
List <KeyPoint> list = m_Stream.GetStream();
for (int k = list.Count - 1; k >= 0; --k)
{
RectangleF rect = new RectangleF(list[k].Time - size, list[k].GetValue((uint)j) - size, size * 2, size * 2);
PointF pt = ScreenToWorld(e.X, e.Y);
if (rect.Contains(pt))
{
if (list.Count <= 2)
{
m_CurrentKeyPoint = list[k];
m_CurrentStreamIndex = j;
m_CurrentKeyPointIndex = k;
Invalidate();
base.OnMouseDown(e);
return;
}
m_Stream.RemoveKeyPoint(k);
Invalidate();
m_CurrentKeyPoint = null;
base.OnMouseDown(e);
return;
}
}
}
m_CurrentKeyPoint = null;
Invalidate();
}
else
{
if (m_Stream == null)
{
return;
}
//否则检测是否选中了操作器
for (int j = 0; j < m_Stream.GetStreamCount(); ++j)
{
if (!m_Stream.GetStreamEnable(j))
{
continue;
}
List <KeyPoint> list = m_Stream.GetStream();
for (int k = list.Count - 1; k >= 0; --k)
{
RectangleF rect = new RectangleF(list[k].Time - size, list[k].GetValue((uint)j) - size, size * 2, size * 2);
PointF pt = ScreenToWorld(e.X, e.Y);
if (rect.Contains(pt))
{
m_CurrentKeyPoint = list[k];
m_CurrentStreamIndex = j;
m_CurrentKeyPointIndex = k;
Invalidate();
base.OnMouseDown(e);
return;
}
}
}
m_CurrentKeyPoint = null;
Invalidate();
}
}
base.OnMouseDown(e);
}
protected void DrawLine(Graphics canvas, Pen pen, KeyPoint st, KeyPoint ed, uint index)
{
{
DrawLine(canvas, pen, st.Time, st.GetValue(index), ed.Time, ed.GetValue(index));
}
}