/// <summary>
/// 图片左键按下
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void IMG1_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
var img = sender as ContentControl;
if (img == null)
{
return;
}
var group = IMG.FindResource("Imageview") as TransformGroup;
var transform = group.Children[1] as TranslateTransform;
var transform2 = group.Children[0] as ScaleTransform;
GeneralTransform generalTransform1 = IMG1.TransformToAncestor(borderWin);
Point currentPoint = generalTransform1.Transform(new Point(0, 0));
double left = currentPoint.X;
double top = currentPoint.Y;
double right = borderWin.ActualWidth - left - IMG1.ActualWidth * transform2.ScaleX;
double bottom = borderWin.ActualHeight - top - IMG1.ActualHeight * transform2.ScaleY;
if (left >= 0 && right >= 0 && top >= 0 && bottom >= 0)
{
mouseDown = false;
imgIsDown = true;
this.DragMove();
}
else
{
e.Handled = true;
img.CaptureMouse();
mouseXY = e.GetPosition(img);
imgIsDown = true;
mouseDown = true;
}
}
/// <summary>
/// 执行缩放操作
/// </summary>
/// <param name="group"></param>
/// <param name="point"></param>
/// <param name="delta"></param>
private void DowheelZoom(TransformGroup group, Point point, double delta)
{
var pointToContent = group.Inverse.Transform(point);
//var pointToContent = ScaleCenter;
var transform = group.Children[0] as ScaleTransform;
if (transform.ScaleX + delta < 0.1)
{
return;
}
transform.ScaleX += delta;
transform.ScaleY += delta;
var transform1 = group.Children[1] as TranslateTransform;
GeneralTransform generalTransform1 = IMG1.TransformToAncestor(borderWin);
Point currentPoint = generalTransform1.Transform(new Point(0, 0));
double left = currentPoint.X;
double top = currentPoint.Y;
double right = borderWin.ActualWidth - left - IMG1.ActualWidth * transform.ScaleX;
double bottom = borderWin.ActualHeight - top - IMG1.ActualHeight * transform.ScaleY;
if (transform.ScaleX > 1 && delta < 0 && IMG1.ActualHeight >= this.MinHeight)
{
bool XIsContinue = true;
bool YIsContinue = true;
//-------X
if (right >= 0 && left < 0)
{
transform1.X = borderWin.ActualWidth - IMG1.ActualWidth * transform.ScaleX;
XIsContinue = false;
}
if (left >= 0 && right < 0)
{
transform1.X = 0;
XIsContinue = false;
}
if (XIsContinue)
{
transform1.X = -1 * ((pointToContent.X * transform.ScaleX) - point.X);
}
//-------Y
if (bottom >= 0 && top < 0)
{
transform1.Y = borderWin.ActualHeight - IMG1.ActualHeight * transform.ScaleY;
YIsContinue = false;
}
if (top >= 0 && bottom < 0)
{
transform1.Y = 0;
YIsContinue = false;
}
if (top < 0 && bottom < 0)
{
transform1.Y = -1 * ((pointToContent.Y * transform.ScaleY) - point.Y);
}
if (YIsContinue)
{
transform1.Y = -1 * ((pointToContent.Y * transform.ScaleY) - point.Y);
}
}
else
{
transform1.X = -1 * ((pointToContent.X * transform.ScaleX) - point.X);
transform1.Y = -1 * ((pointToContent.Y * transform.ScaleY) - point.Y);
}
this.gridProgress.Visibility = Visibility.Visible;
int percent = (int)(transform.ScaleX * 100);
if (percent == 100)
{
transform1.X = 0;
transform1.Y = 0;
transform.ScaleX = 1;
transform.ScaleY = 1;
}
txtProgress.Text = string.Format("{0}%", percent);
(this.Resources["ShowProgress"] as Storyboard).Begin();
}
/// <summary>
/// 执行移动操作
/// </summary>
/// <param name="img"></param>
/// <param name="e"></param>
private void Domousemove(MainWindow img, MouseEventArgs e)
{
if (e.LeftButton != MouseButtonState.Pressed)
{
return;
}
var group = IMG.FindResource("Imageview") as TransformGroup;
var transform = group.Children[1] as TranslateTransform;
var transformScale = group.Children[0] as ScaleTransform;
var position = e.GetPosition(img);
GeneralTransform generalTransform1 = IMG1.TransformToAncestor(borderWin);
Point currentPoint = generalTransform1.Transform(new Point(0, 0));
double left = currentPoint.X;
double top = currentPoint.Y;
double right = borderWin.ActualWidth - left - IMG1.ActualWidth * transformScale.ScaleX;
double bottom = borderWin.ActualHeight - top - IMG1.ActualHeight * transformScale.ScaleY;
bool IsFresh = false;
if ((mouseXY.X - position.X < 0 && left < 0) || (mouseXY.X - position.X > 0 && right < 0))
{
if (this.MinWidth > IMG1.ActualWidth)
{
if (mouseXY.X - position.X < 0 && transform.X - mouseXY.X + position.X > 0)
{
transform.X = 0;
}
else if (mouseXY.X - position.X > 0 && right + mouseXY.X - position.X > 0)
{
transform.X = borderWin.ActualWidth - IMG1.ActualWidth * transformScale.ScaleX;
}
else
{
transform.X -= mouseXY.X - position.X;
}
IsFresh = true;
}
else
{
if (mouseXY.X - position.X < 0 && transform.X - mouseXY.X + position.X > 0)
{
transform.X = 0;
}
else if (mouseXY.X - position.X > 0 && right + mouseXY.X - position.X > 0)
{
transform.X = borderWin.ActualWidth - IMG1.ActualWidth * transformScale.ScaleX;
}
else
{
transform.X -= mouseXY.X - position.X;
}
IsFresh = true;
}
}
if ((mouseXY.Y - position.Y < 0 && top < 0) || (mouseXY.Y - position.Y > 0 && bottom < 0))
{
if (this.MinWidth > IMG1.ActualWidth)
{
if (mouseXY.Y - position.Y < 0 && transform.Y - mouseXY.Y + position.Y > 0)
{
transform.Y = 0;
}
else if (mouseXY.Y - position.Y > 0 && bottom + mouseXY.Y - position.Y > 0)
{
transform.Y = borderWin.ActualHeight - IMG1.ActualHeight * transformScale.ScaleY;
}
else
{
transform.Y -= mouseXY.Y - position.Y;
}
IsFresh = true;
}
else
{
if (mouseXY.Y - position.Y < 0 && transform.Y - mouseXY.Y + position.Y > 0)
{
transform.Y = 0;
}
else if (mouseXY.Y - position.Y > 0 && transform.Y - mouseXY.Y + position.Y < borderWin.ActualHeight - IMG1.ActualHeight * transformScale.ScaleY)
{
transform.Y = borderWin.ActualHeight - IMG1.ActualHeight * transformScale.ScaleY;
}
else
{
transform.Y -= mouseXY.Y - position.Y;
}
IsFresh = true;
}
}
mouseXY = position;
}