public Point geoToView(double lat, double lon, iustc.map.data.Rectangle rect)
{
if (geoToViewRect != rect)
{
geoToViewRect = rect;
Point p1 = Toolkit.geoToView(rect.north, rect.west);
Point p2 = Toolkit.geoToView(rect.south, rect.east);
geoToViewX1 = p1.X;
geoToViewY1 = p1.Y;
geoToViewX2 = p2.X;
geoToViewY2 = p2.Y;
}
Point p = Toolkit.geoToView(lat, lon);
float x = (float)((p.X - geoToViewX1) / (geoToViewX2 - geoToViewX1));
float y = (float)((p.Y - geoToViewY1) / (geoToViewY2 - geoToViewY1));
return new Point(x * size, y * size);
}
public bool intersects(Rectangle rect)
{
return !(south > rect.north || north < rect.south || west > rect.east || east < rect.west);
}
// 构造函数
public MainPage()
{
InitializeComponent();
this.lat = 0.0;
this.lon = 0.0;
this.zoomlevel = MIN_ZOOM_LEVEL;
this.targetZoomLevel = 19;
this.scale = 1;
this.threshold = getDPI() * 0.06f;
this.hasTarget = false;
this.isTracking = false;
this.hasPosition = false;
plotterHelper = new PlotterHelper();
westCampus = new iustc.map.data.Rectangle(31.836497, 31.844080, 117.245445, 117.255058);
eastCamput = new iustc.map.data.Rectangle(31.834236, 31.844189, 117.258920, 117.267889);
arrowUri = new Uri("/iUSTCMap;component/resources/map_location_arrow.png", UriKind.Relative);
dotUri = new Uri("/iUSTCMap;component/resources/map_location_dot.png", UriKind.Relative);
arrowBitmap = new BitmapImage(arrowUri);
dotBitmap = new BitmapImage(dotUri);
if (cm == null)
cm = new CacheManager(CACHE_CAPACITY, this);
if (pThread == null)
pThread = new PlotterThread(cm);
watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High); // using high accuracy
LayoutRoot.Background = new SolidColorBrush(Color.FromArgb(255, 236, 236, 236));
isoFile = IsolatedStorageFile.GetUserStoreForApplication();
if (!isoFile.DirectoryExists("cache"))
{
isoFile.CreateDirectory("cache");
}
#region appBar
appBar = new ApplicationBar();
appBar.Opacity = 0.5;
locateButton = new ApplicationBarIconButton(new Uri("resources/appbar.locate.rest.png", UriKind.Relative));
locateButton.Text = "定位";
locateButton.Click += new EventHandler(locateButton_Click);
appBar.Buttons.Add(locateButton);
zoomInButton = new ApplicationBarIconButton(new Uri("resources/appbar.new.rest.png", UriKind.Relative));
zoomInButton.Text = "放大";
zoomInButton.Click += new EventHandler(zoomInButton_Click);
appBar.Buttons.Add(zoomInButton);
zoomOutButton = new ApplicationBarIconButton(new Uri("resources/appbar.minus.rest.png", UriKind.Relative));
zoomOutButton.Text = "缩小";
zoomOutButton.Click += new EventHandler(zoomOutButton_Click);
appBar.Buttons.Add(zoomOutButton);
selectCampusButton = new ApplicationBarIconButton(new Uri("resources/appbar.east.rest.png", UriKind.Relative));
selectCampusButton.Text = "东校区";
selectCampusButton.Click += new EventHandler(selectCampusButton_Click);
appBar.Buttons.Add(selectCampusButton);
ApplicationBar = appBar;
#endregion
}
public iustc.map.data.Rectangle getView(double lat, double lon, int level, float scale)
{
Point p = Toolkit.geoToView(lat, lon);
double size = fullTileSize(level, scale);
double dw = this.getWidth() * 0.5 / size;
double dh = this.getHeight() * 0.5 / size;
GeoPoint g1 = Toolkit.viewToGeo(p.X - dw, p.Y - dh);
GeoPoint g2 = Toolkit.viewToGeo(p.X + dw, p.Y + dh);
iustc.map.data.Rectangle rect = new iustc.map.data.Rectangle(g2.lat, g1.lat, g1.lon, g2.lon);
return rect;
}