//按下鼠标
private void UserControl_MouseDown(object sender, MouseButtonEventArgs e)
{
this.MouseLocation = MouseLocationEnum.None;
if (e.OriginalSource.GetType() == typeof(Rectangle))
{
Rectangle Act = e.OriginalSource as Rectangle;
switch (Act.Name)
{
case "R_Left": MouseLocation = MouseLocationEnum.Left; break;
case "R_LeftUp": MouseLocation = MouseLocationEnum.LeftUp; break;
case "R_Up": MouseLocation = MouseLocationEnum.Up; break;
case "R_RightUp": MouseLocation = MouseLocationEnum.RightUp; break;
case "R_Right": MouseLocation = MouseLocationEnum.Right; break;
case "R_RightDown": MouseLocation = MouseLocationEnum.RightDown; break;
case "R_Down": MouseLocation = MouseLocationEnum.Down; break;
case "R_LeftDown": MouseLocation = MouseLocationEnum.LeftDown; break;
default: MouseLocation = MouseLocationEnum.None; break;
}
this.Action = MouseActionEx.Drag;
}
else
{
this.MouseDownPoint = Mouse.GetPosition(e.Source as FrameworkElement);//WPF方法
this.MouseDownLocate = this.ImageArea.TransformToAncestor((UIElement)this.MainGrid).Transform(new Point(0, 0));
if ((this.MouseDownLocate.X < this.MouseDownPoint.X && this.MouseDownPoint.X < this.MouseDownLocate.X + this.ImageArea.ActualWidth) &&
(this.MouseDownLocate.Y < this.MouseDownPoint.Y && this.MouseDownPoint.Y < this.MouseDownLocate.Y + this.ImageArea.ActualHeight)
)
{
this.Action = MouseActionEx.DragMove;
}
}
}
//鼠标离开
private void UserControl_MouseLeave(object sender, MouseEventArgs e)
{
this.Action = MouseActionEx.None;
}
//弹起鼠标
private void UserControl_MouseUp(object sender, MouseButtonEventArgs e)
{
this.Action = MouseActionEx.None;
this.Cursor = Cursors.Arrow;
}
//移动鼠标
private void UserControl_MouseMove(object sender, MouseEventArgs e)
{
//鼠标相对空间区域位置
Point MousePoint = e.GetPosition((IInputElement)this.MainGrid);
Point ImageLocate = this.ImageArea.TransformToAncestor((UIElement)this.MainGrid).Transform(new Point(0, 0));
if (ImageLocate.X <= MousePoint.X && MousePoint.X <= ImageLocate.X + this.ImageArea.ActualWidth &&
ImageLocate.Y <= MousePoint.Y && MousePoint.Y <= ImageLocate.Y + this.ImageArea.ActualHeight)
{
this.Cursor = Cursors.Hand;
}
else
{
this.Cursor = Cursors.Arrow;
}
//边框拉伸
if (this.Action == MouseActionEx.Drag)
{
this.Cursor = this.MouseCursor;
//剪辑图片区域宽高
double ImageAreaWidth = this.ImageArea.ActualWidth;
double ImageAreaHeight = this.ImageArea.ActualHeight;
//裁剪区域理论位置
RectangleAreaModel Model = this.CalculatedArea(MousePoint, false);
if (Model != null)
{
//不能超出边界区域
if (Model.X + Model.Width + MaxMargin > this.ActualWidth ||
Model.Y + Model.Height + MaxMargin > this.ActualHeight ||
Model.X < MaxMargin ||
Model.Y < MaxMargin
)
{
this.Cursor = Cursors.Arrow;
this.Action = MouseActionEx.None;
return;
}
if (Model.Width < 0 || Model.Height < 0)
{
this.Cursor = Cursors.Arrow;
this.Action = MouseActionEx.None;
return;
}
this.ImageArea.Width = Model.Width;
this.ImageArea.Height = Model.Height;
this.ImageArea.SetValue(HorizontalAlignmentProperty, HorizontalAlignment.Left);
this.ImageArea.SetValue(VerticalAlignmentProperty, VerticalAlignment.Top);
this.ImageArea.SetValue(MarginProperty, new Thickness(Model.X, Model.Y, 0, 0));
// CutImage();
}
}
else if (this.Action == MouseActionEx.DragMove)//拖动
{
double Left = this.MouseDownLocate.X + (MousePoint.X - MouseDownPoint.X);
double Top = this.MouseDownLocate.Y + (MousePoint.Y - MouseDownPoint.Y);
//不能超出边界区域
if (Left < MaxMargin ||
Top < MaxMargin ||
(Left + this.ImageArea.ActualWidth + MaxMargin) > this.ActualWidth ||
(Top + this.ImageArea.ActualHeight + MaxMargin) > this.ActualHeight)
{
this.Cursor = Cursors.Arrow;
this.Action = MouseActionEx.None;
return;
}
this.ImageArea.Width = this.ImageArea.ActualWidth;
this.ImageArea.Height = this.ImageArea.ActualHeight;
this.ImageArea.SetValue(HorizontalAlignmentProperty, HorizontalAlignment.Left);
this.ImageArea.SetValue(VerticalAlignmentProperty, VerticalAlignment.Top);
this.ImageArea.SetValue(MarginProperty, new Thickness(Left, Top, 0, 0));
//CutImage();
}
else
{
//this.Cursor = Cursors.Arrow;
}
}
