void panel1_MouseWheel(object sender, MouseEventArgs e)
{
try
{
if (layer != null && panel1.Bounds.Contains(e.Location))
{
if (e.Delta > 0)
{
FVertex mouselocation = view.ToMapVertex(new Point(e.X, e.Y));
double ZoomInfactor = 0.85;
double newwidth = view.MyMapExtent.width * ZoomInfactor;
double newheight = view.MyMapExtent.height * ZoomInfactor;
double newminx = mouselocation.getX() - (mouselocation.getX() - view.MyMapExtent.minX) * ZoomInfactor;
double newminy = mouselocation.getY() - (mouselocation.getY() - view.MyMapExtent.minY) * ZoomInfactor;
view.MyMapExtent.setValue(new FVertex(newminx + newwidth, newminy + newheight), new FVertex(newminx, newminy));
DrawMap();
}
else if (e.Delta < 0)
{
FVertex mouselocation = view.ToMapVertex(new Point(e.X, e.Y));
double ZoomInfactor = 0.85;
double newwidth = view.MyMapExtent.width / ZoomInfactor;
double newheight = view.MyMapExtent.height / ZoomInfactor;
double newminx = mouselocation.getX() - (mouselocation.getX() - view.MyMapExtent.minX) / ZoomInfactor;
double newminy = mouselocation.getY() - (mouselocation.getY() - view.MyMapExtent.minY) / ZoomInfactor;
view.MyMapExtent.setValue(new FVertex(newminx + newwidth, newminy + newheight), new FVertex(newminx, newminy));
DrawMap();
}
}
}
catch
{
MessageBox.Show("Error");
}
}
private void panel1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
switch (MouseCommand)
{
case MOUSECOMMAND.Select:
{
if (layer == null)
{
break;
}
layer.ClearSelection();
if (e.X == MouseStartX && e.Y == MouseStartY) //点选
{
FFeature feature = layer.SelectByClick(new Point(e.X, e.Y), view);
if (feature != null)
{
feature.selected = true;
}
}
else //框选
{
FExtent extent = view.RectToExtent(new Rectangle(
Math.Min(e.X, MouseStartX), Math.Min(e.Y, MouseStartY),
Math.Abs(e.X - MouseStartX), Math.Abs(e.Y - MouseStartY)));
List <FFeature> features = layer.SelectByExtent(extent);
for (int j = 0; j < features.Count; j++)
{
features[j].selected = true;
}
}
DrawMap();
if (attributeDialog != null)
{
attributeDialog.UpdataSelection();
}
break;
}
case MOUSECOMMAND.ZoomIn:
{
if (e.X == MouseStartX && e.Y == MouseStartY)
{
FVertex mouselocation = view.ToMapVertex(new Point(e.X, e.Y));
double ZoomInfactor = 0.9;
double newwidth = view.MyMapExtent.width * ZoomInfactor;
double newheight = view.MyMapExtent.height * ZoomInfactor;
double newminx = mouselocation.getX() - (mouselocation.getX() - view.MyMapExtent.minX) * ZoomInfactor;
double newminy = mouselocation.getY() - (mouselocation.getY() - view.MyMapExtent.minY) * ZoomInfactor;
view.MyMapExtent.setValue(new FVertex(newminx + newwidth, newminy + newheight), new FVertex(newminx, newminy));
}
else
{
view.MyMapExtent = view.RectToExtent(new Rectangle(
Math.Min(e.X, MouseStartX), Math.Min(e.Y, MouseStartY),
Math.Abs(e.X - MouseStartX), Math.Abs(e.Y - MouseStartY)));
}
DrawMap();
break;
}
case MOUSECOMMAND.ZoomOut:
{
if (e.X == MouseStartX && e.Y == MouseStartY)
{
FVertex mouselocation = view.ToMapVertex(new Point(e.X, e.Y));
double ZoomInfactor = 0.9;
double newwidth = view.MyMapExtent.width / ZoomInfactor;
double newheight = view.MyMapExtent.height / ZoomInfactor;
double newminx = mouselocation.getX() - (mouselocation.getX() - view.MyMapExtent.minX) / ZoomInfactor;
double newminy = mouselocation.getY() - (mouselocation.getY() - view.MyMapExtent.minY) / ZoomInfactor;
view.MyMapExtent.setValue(new FVertex(newminx + newwidth, newminy + newheight), new FVertex(newminx, newminy));
}
else
{
FExtent extent = view.RectToExtent(new Rectangle(
Math.Min(e.X, MouseStartX), Math.Min(e.Y, MouseStartY),
Math.Abs(e.X - MouseStartX), Math.Abs(e.Y - MouseStartY)));
//新的地图范围
double newwidth = view.MyMapExtent.width * view.MyMapExtent.width / extent.width;
double newheight = view.MyMapExtent.height * view.MyMapExtent.height / extent.height;
double newminx = extent.minX - (extent.minX - view.MyMapExtent.minX) * newwidth / view.MyMapExtent.width;
double newminy = extent.minY - (extent.minY - view.MyMapExtent.minY) * newheight / view.MyMapExtent.height;
view.MyMapExtent.setValue(new FVertex(newminx + newwidth, newminy + newheight), new FVertex(newminx, newminy));
}
DrawMap();
break;
}
case MOUSECOMMAND.Pan:
{
FVertex C1 = view.MyMapExtent.mapcenter;
FVertex M1 = view.ToMapVertex(new Point(MouseStartX, MouseStartY));
FVertex M2 = view.ToMapVertex(new Point(e.X, e.Y));
FVertex C2 = new FVertex(C1.getX() - (M2.getX() - M1.getX()), C1.getY() - (M2.getY() - M1.getY()));
view.MyMapExtent.SetMapCenter(C2);
DrawMap();
break;
}
}
}
}
