void OnMapControlViewportChanged(object sender, PrjRectangleF oldviewport, PrjRectangleF newviewport)
{
if (_viewport.Width < double.Epsilon || _viewport.Height < double.Epsilon)
{
return;
}
_resolutionX = _viewport.Width / mapImage.ActualWidth;
_resolutionY = _viewport.Height / mapImage.ActualHeight;
double res = _resolutionY;
double x = (newviewport.MinX - _viewport.MinX) / res;
double y = (_viewport.MaxY - newviewport.MaxY) / res;
double w = newviewport.Width / res;
double h = newviewport.Height / res;
Canvas.SetLeft(foucusBox, x + cstLeftBanks / 2);
Canvas.SetTop(foucusBox, y + cstTopBanks / 2 + 4);
foucusBox.Width = w;
if (h > 8)
{
foucusBox.Height = h - 8;
}
else
{
foucusBox.Height = h;
}
}
void OnMapControlViewportChanged(object sender, PrjRectangleF oldviewport, PrjRectangleF newviewport)
{
IMapControl mapcontrol = sender as IMapControl;
txtDistance.Text = (ActualWidth * mapcontrol.Resolution / 1000).ToString("0.###") + "公里";
txtScale.Text = "1:" + mapcontrol.Scale.ToString();
txtResolution.Text = mapcontrol.Resolution.ToString("0.00") + "米";
}
protected override void HandleRectBox(Point prjLeftUp, Point prjRightBottom)
{
PrjRectangleF viewport = new PrjRectangleF();
viewport.MinX = prjLeftUp.X;
viewport.MaxX = prjRightBottom.X;
viewport.MinY = prjRightBottom.Y;
viewport.MaxY = prjLeftUp.Y;
_mapcontrol.SetViewportByPrj(viewport);
}
public static PrjRectangleF FromLTRB(double left, double top, double right, double bottom)
{
PrjRectangleF rect = new PrjRectangleF();
rect.MinX = left;
rect.MaxX = right;
rect.MinY = bottom;
rect.MaxY = top;
return(rect);
}
public void ZoomOut()
{
PrjRectangleF _viewport = _mapcontrol.Viewport;
double zoomWidthAmount = _viewport.Width * panzoomFactor;
double zoomHeightAmount = _viewport.Height * panzoomFactor;
PrjRectangleF newViewport = _viewport;
newViewport.Inflate(zoomWidthAmount, zoomHeightAmount);
//
_mapcontrol.SetViewportByPrj(newViewport);
}
private void foucusBox_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (_dragingBox)
{
//
PrjRectangleF viewport = new PrjRectangleF();
double x = Canvas.GetLeft(foucusBox);
double y = Canvas.GetTop(foucusBox);
viewport.MinX = x * _resolutionX + _viewport.MinX;
viewport.MaxY = _viewport.MaxY - y * _resolutionY;
viewport.MaxX = viewport.MinX + foucusBox.Width * _resolutionX;
viewport.MinY = viewport.MaxY - foucusBox.Height * _resolutionY;
//
_mapcontrol.SetViewportByPrj(viewport);
}
_dragingBox = false;
}
private void ComputePrjTransfrom()
{
PrjRectangleF newViewport = _viewport;
//如果_offsetX与_offsetY不为0，则表示地图正在漫游
newViewport.Offset(-_offsetX, _offsetY);
if (_onMapControlViewportChanged != null)
{
_onMapControlViewportChanged(this, _viewport, newViewport);
}
TranslateTransform translateMatrix = null;
ScaleTransform scaleMatrix = null;
if (_prj2PixelTransform == null)
{
TransformGroup tran = new TransformGroup();
translateMatrix = new TranslateTransform();
scaleMatrix = new ScaleTransform();
ScaleTransform negMatrix = new ScaleTransform();
negMatrix.ScaleX = 1;
negMatrix.ScaleY = -1;
tran.Children.Add(negMatrix);
tran.Children.Add(translateMatrix);
tran.Children.Add(scaleMatrix);
//
translateMatrix.X = -newViewport.MinX; //left
translateMatrix.Y = newViewport.MaxY; //top
scaleMatrix.ScaleX = 1d / _resolutionX;
scaleMatrix.ScaleY = 1d / _resolutionY;
//
_prj2PixelTransform = tran;
}
else
{
translateMatrix = (_prj2PixelTransform as TransformGroup).Children[1] as TranslateTransform;
scaleMatrix = (_prj2PixelTransform as TransformGroup).Children[2] as ScaleTransform;
//
translateMatrix.X = -newViewport.MinX;
translateMatrix.Y = newViewport.MaxY;
scaleMatrix.ScaleX = 1d / _resolutionX;
scaleMatrix.ScaleY = 1d / _resolutionY;
}
_pixel2PrjTransform = _prj2PixelTransform.Inverse as Transform;
}
protected override void HandleRectBox(Point prjLeftUp, Point prjRightBottom)
{
PrjRectangleF rect = new PrjRectangleF();
rect.MinX = prjLeftUp.X;
rect.MaxX = prjRightBottom.X;
rect.MinY = prjRightBottom.Y;
rect.MaxY = prjLeftUp.Y;
//
PrjRectangleF oldrect = _mapcontrol.Viewport;
double panzoomFactor = Math.Min(oldrect.Width / rect.Width, oldrect.Height / rect.Height);
double zoomWidthAmount = oldrect.Width * panzoomFactor;
double zoomHeightAmount = oldrect.Height * panzoomFactor;
//
rect.Inflate(zoomWidthAmount, zoomHeightAmount);
//
_mapcontrol.SetViewportByPrj(rect);
}
void MapServiceClient_GeoEnvelope2PrjEnvelopeCompleted(object sender, AgileMapServiceProxy.GeoEnvelope2PrjEnvelopeCompletedEventArgs e)
{
if (!IsResponseFromInsideRequested(e.UserState))
{
return;
}
string rect = e.Result;
if (string.IsNullOrEmpty(rect))
{
return;
}
string[] ds = rect.Split(',');
PrjRectangleF fullViewport = new PrjRectangleF();
fullViewport.MinX = double.Parse(ds[0]);
fullViewport.MaxX = fullViewport.MinX + double.Parse(ds[2]);
fullViewport.MinY = double.Parse(ds[1]);
fullViewport.MaxY = fullViewport.MinY + double.Parse(ds[3]);
RequestMap(fullViewport);
}
private void RequestMap(PrjRectangleF fullViewport)
{
_mapcontrol.MapServerAgent.MapServiceClient.GetMapImageAsync(fullViewport.MinX,
fullViewport.MinY, fullViewport.Width, fullViewport.Height, (int)ActualWidth, (int)ActualHeight, null, cstInsideRequestIdentify);
}
public void SetViewportByPrj(PrjRectangleF viewport)
{
_viewport = viewport;
RefreshMap();
}
