private void movingVideo(Point pos)
{
TransformParam st = ViewModel.DisplayModel.VideoTransform;
Vector vec = pos - _downPoint;
if (vec.X > _mvLeft.X)
{
vec.X = _mvLeft.X;
}
if (vec.Y > _mvLeft.Y)
{
vec.Y = _mvLeft.Y;
}
if (vec.X < _mvRight.X)
{
vec.X = _mvRight.X;
}
if (vec.Y < _mvRight.Y)
{
vec.Y = _mvRight.Y;
}
Point p = _mvLeft - vec;
st.TranslateX = -p.X;
st.TranslateY = -p.Y;
}
private void Button_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
_moving = true;
Button btn = e.Source as Button;
if (btn == null)
{
return;
}
Console.WriteLine(btn);
m_startPos = e.GetPosition(gridArcBall);
btn.AddHandler(Button.MouseMoveEvent, new RoutedEventHandler(Button_MouseMove), true);
//计算控制按钮的平移
GeneralTransform gt = btn.TransformToVisual(gridArcBall);
Point center = gt.Transform(new Point(btn.ActualWidth / 2, btn.ActualHeight / 2));
//获取旋转角度。
double angle = getRotateAngle(center);
//计算相对中心点偏移量。
Point refCenter = new Point(center.X - gridArcBall.ActualWidth / 2, center.Y - gridArcBall.ActualHeight / 2);
double maxLen = (gridArcBall.ActualHeight - btn.ActualHeight) / 2;
TransformParam tp = (TransformParam)btnCtrlArrow.DataContext;
tp.TranslateX = center.X - btnCtrlArrow.ActualWidth / 2;
tp.TranslateY = center.Y - btnCtrlArrow.ActualHeight / 2;
tp.RotateAngle = angle;
if (!btn.Equals(btnCenter))
{
SetPTZSpeed(refCenter.X / maxLen, refCenter.Y / maxLen);
}
Console.WriteLine("MouseDown");
}
//重新计算缩放和平移。
private void GridMain_SizeChanged(object sender, SizeChangedEventArgs e)
{
TransformParam tp = ViewModel.DisplayModel.VideoTransform;
Vector transVec = new Vector(tp.TranslateX, tp.TranslateY);
transVec = calcTranslate(transVec, tp);
tp.TranslateX = transVec.X;
tp.TranslateY = transVec.Y;
}
private bool beginMoveVideo()
{
TransformParam st = ViewModel.DisplayModel.VideoTransform;
if (st.ScaleX <= 1 && st.ScaleY <= 1)
{
return(false);
}
else
{
_mvLeft = gridMain.TranslatePoint(new Point(), videoDisp);
_mvRight = gridMain.TranslatePoint(new Point(gridMain.ActualWidth, gridMain.ActualHeight), videoDisp);
_mvRight = new Point(_mvRight.X - videoDisp.ActualWidth, _mvRight.Y - videoDisp.ActualHeight);
_mvLeft = new Point(_mvLeft.X * st.ScaleX, _mvLeft.Y * st.ScaleY);
_mvRight = new Point(_mvRight.X * st.ScaleX, _mvRight.Y * st.ScaleY);
return(true);
}
}
private Vector calcTranslate(Vector vec, TransformParam tp)
{
if (vec.X > 0)
{
vec.X = 0;
}
if (vec.Y > 0)
{
vec.Y = 0;
}
double realW = videoDisp.ActualWidth * tp.ScaleX;
double realH = videoDisp.ActualHeight * tp.ScaleY;
if (vec.X + realW < gridMain.ActualWidth)
{
vec.X = gridMain.ActualWidth - realW;
}
if (vec.Y + realH < gridMain.ActualHeight)
{
vec.Y = gridMain.ActualHeight - realH;
}
return(vec);
}
private void scaleVideo(MouseWheelEventArgs e)
{
TransformParam tp = ViewModel.DisplayModel.VideoTransform;
Point p = e.GetPosition(videoDisp);
if (e.Delta > 0 && tp.ScaleX <= 4.9)
{
tp.ScaleY = tp.ScaleX = tp.ScaleX + 0.1;
}
else if (e.Delta < 0 && tp.ScaleX > 1)
{
tp.ScaleY = tp.ScaleX = tp.ScaleX - 0.1;
}
p = new Point(p.X * tp.ScaleX, p.Y * tp.ScaleY);
Point parentPos = e.GetPosition(gridMain);
Vector transVec = parentPos - p;
transVec = calcTranslate(transVec, tp);
tp.TranslateX = transVec.X;
tp.TranslateY = transVec.Y;
}
private void Button_MouseMove(object sender, RoutedEventArgs e)
{
if (!_moving)
{
return;
}
Button btn = e.Source as Button;
if (btn == null)
{
return;
}
Point pnt = ((MouseEventArgs)e).GetPosition(gridArcBall);
Point temp = new Point(pnt.X - m_startPos.X, pnt.Y - m_startPos.Y);
//计算控制按钮的平移
GeneralTransform gt = btn.TransformToVisual(gridArcBall);
Point center = gt.Transform(new Point(btn.ActualWidth / 2, btn.ActualHeight / 2));
center = new Point(center.X + temp.X, center.Y + temp.Y);
//计算相对中心点偏移量。
Point refCenter = new Point(center.X - gridArcBall.ActualWidth / 2, center.Y - gridArcBall.ActualHeight / 2);
double len = Math.Sqrt(refCenter.X * refCenter.X + refCenter.Y * refCenter.Y);
double maxLen = (gridArcBall.ActualHeight - btn.ActualHeight) / 2;
if (len >= maxLen)
{
double scale = maxLen / len;
refCenter.X *= scale;
refCenter.Y *= scale;
len = maxLen;
}
//获取旋转角度。
double angle = getRotateAngle(center);
//计算速度提示条的平移量。
double ratio = 1d - (btn.ActualWidth + speedBar1.ActualWidth) / 2 / len;
Point speedCenter = new Point(refCenter.X * ratio, refCenter.Y * ratio);
speedCenter = new Point(speedCenter.X + gridArcBall.ActualWidth / 2, speedCenter.Y + gridArcBall.ActualHeight / 2);
//变换速度提示条。
TransformParam scTP = (TransformParam)speedBar1.DataContext;
scTP.TranslateX = speedCenter.X - speedBar1.ActualWidth / 2;
scTP.TranslateY = speedCenter.Y - speedBar1.ActualHeight / 2;
scTP.RotateAngle = angle;
center = new Point(refCenter.X + gridArcBall.ActualWidth / 2, refCenter.Y + gridArcBall.ActualHeight / 2);
TransformParam tp = (TransformParam)btnCtrlArrow.DataContext;
tp.TranslateX = center.X - btnCtrlArrow.ActualWidth / 2;
tp.TranslateY = center.Y - btnCtrlArrow.ActualHeight / 2;
tp.RotateAngle = angle;
//设置速度
if (Math.Abs(temp.X) > 0 || Math.Abs(temp.Y) > 0)
{
lock (_obj)
_curPosition = new Point(refCenter.X / maxLen, refCenter.Y / maxLen);
//SetPTZSpeed(refCenter.X / maxLen, refCenter.Y / maxLen);
}
speedBar1.Speed = len / maxLen;
}