private void Form1_MouseClick(object sender, MouseEventArgs e)
{//点击空间对象显示属性信息
//根据鼠标的点击创建节点信息
if (features.Count == 0)
{
return;
}
GISVertex mouselocation = view.ToMapVertex(e.Location);
double mindistance = Double.MaxValue;
int id = -1;
//通过遍历找出features数组中元素的中心点与点击位置最近的点
for (int i = 0; i < features.Count; i++)
{
double onedistance = features[i].spatialpart.centroid.Distance(mouselocation);
if (onedistance < mindistance)
{
mindistance = onedistance;
id = i;
}
}
//判断是否存在空间对象
if (id == -1)
{
MessageBox.Show("没有任何空间对象！！");
return;//结束了
}
Point nearestpoint = view.ToScreenPoint(features[id].spatialpart.centroid);
if (ScreenDistance(e.Location, nearestpoint) < 5)
{
MessageBox.Show(features[id].getAttribute(0).ToString());
}
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
if (layer == null)
{
return;
}
GISVertex v = view.ToMapVertex(e.Location);
Console.WriteLine("mapvertex @" + v.x.ToString() + "|" + v.y.ToString()); //此处鼠标点到地图点的转换???
//创建点选粗选矩形
GISSelect s = new GISSelect();
GISExtent MinSelectExtent = s.BuildExtent(v, view);
Point bottomleft = view.ToScreenPoint(MinSelectExtent.bottomleft);
Point upleft = view.ToScreenPoint(new GISVertex(MinSelectExtent.bottomleft.x, MinSelectExtent.upright.y));
Point upright = view.ToScreenPoint(MinSelectExtent.upright);
Point bottomright = view.ToScreenPoint(new GISVertex(MinSelectExtent.upright.x, MinSelectExtent.bottomleft.y));
Point[] points = new Point[] { bottomleft, upleft, upright, bottomright };
Graphics graphics = this.CreateGraphics();
graphics.DrawPolygon(new Pen(GISConst.PolygonBoundaryColor, GISConst.PolygonBoundaryWidth), points);
SelectResult sr = layer.Select(v, view);
if (sr == SelectResult.OK)
{
UpdateMap();
//toolStripStatusLabel1.Text = layer.Selection.Count.ToString();
toolStripStatusLabel2.Text = "click @" + v.x.ToString() + "|" + v.y.ToString();
UpdateAttributeWindow();
//statusStrip1.Text = layer.Selection.Count.ToString();
}
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
GISVertex mouselocation = view.ToMapVertex(new Point(e.X, e.Y));
double mindistance = Double.MaxValue;
int id = -1;
for (int i = 0; i < features.Count; i++)
{
double onedistance = features[i].getSpatial().getCentroid().Distance(mouselocation);
if (onedistance < mindistance)
{
id = i;
mindistance = onedistance;
}
}
if (id == -1)
{
MessageBox.Show("points is an empty set!");
return;
}
int screendistance = view.ToScreenPoint(new GISVertex(mindistance, 0)).X -
view.ToScreenPoint(new GISVertex(0, 0)).X;
if (screendistance > 5)
{
MessageBox.Show("please click one point closely!");
return;
}
MessageBox.Show("attribute is " + features[id].getAttributeValue(0));
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
if (layer == null)
{
return;
}
GISVertex v = view.ToMapVertex(e.Location);
Console.WriteLine("mapvertex @" + v.x.ToString() + "|" + v.y.ToString()); //此处鼠标点到地图点的转换???
SelectResult sr = layer.Select(v, view);
if (sr == SelectResult.OK)
{
UpdateMap();
//toolStripStatusLabel1.Text = layer.Selection.Count.ToString();
//toolStripStatusLabel2.Text = "click @" + v.x.ToString() + "|" + v.y.ToString();
UpdateAttributeWindow();
//statusStrip1.Text = layer.Selection.Count.ToString();
}
}
void pictureBox1_MouseWheel(object sender, MouseEventArgs e)
{
try
{
if (e.Location.X > 0 && e.Location.X < pictureBox1.Width && e.Location.Y > 0 && e.Location.Y < pictureBox1.Height)
{
if (e.Delta > 0)
{
GISVertex MouseLocation = view.ToMapVertex(new Point(e.X, e.Y));
double ZoomInfactor = 0.8;
double newwidth = view.CurrentMapExtent.Width * ZoomInfactor;
double newheight = view.CurrentMapExtent.Height * ZoomInfactor;
double newminx = MouseLocation.x - (MouseLocation.x - view.CurrentMapExtent.MinX) * ZoomInfactor;
double newminy = MouseLocation.y - (MouseLocation.y - view.CurrentMapExtent.MinY) * ZoomInfactor;
view.CurrentMapExtent.SetValue(new GISVertex(newminx, newminy), new GISVertex(newminx + newwidth, newminy + newheight));
}
if (e.Delta < 0)
{
GISVertex MouseLocation = view.ToMapVertex(new Point(e.X, e.Y));
double ZoomOutfactor = 0.8;
double newwidth = view.CurrentMapExtent.Width / ZoomOutfactor;
double newheight = view.CurrentMapExtent.Height / ZoomOutfactor;
double newminx = MouseLocation.x - (MouseLocation.x - view.CurrentMapExtent.MinX) / ZoomOutfactor;
double newminy = MouseLocation.y - (MouseLocation.y - view.CurrentMapExtent.MinY) / ZoomOutfactor;
view.CurrentMapExtent.SetValue(new GISVertex(newminx, newminy), new GISVertex(newminx + newwidth, newminy + newheight));
}
if (Delaunay.Checked || Tyson.Checked)
{
updateview2();
}
else
{
updateview();
}
}
}
catch
{
MessageBox.Show("操作错误");
}
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
if (layer == null)
{
return;
}
GISVertex v = view.ToMapVertex(e.Location);
Console.WriteLine("mapvertex @" + v.x.ToString() + "|" + v.y.ToString()); //此处鼠标点到地图点的转换???
GISSelect gs = new GISSelect();
if (gs.Select(v, layer.GetAllFeatures(), layer.ShapeType, view)
== SelectResult.OK)
{
Console.WriteLine(gs.SelectedFeature.getAttribute(0).ToString());
MessageBox.Show(gs.SelectedFeature.getAttribute(0).ToString());
}
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
if (document.IsEmpty())
{
return;
}
if (MouseOnMap == false)
{
return;
}
MouseOnMap = false;
switch (MouseCommand)
{
case MOUSECOMMAND.Select:
//如果CTRL没被按住，就清空选择集 按住CTRL键表示选择多个 即向选择集中新增空间对象
if (Control.ModifierKeys != Keys.Control)
{
document.ClearSelection();
}
//初始化选择结果
SelectResult sr = SelectResult.UnknownType;
if (e.X == MouseStartX && e.Y == MouseStartY)
{
//点选
GISVertex v = view.ToMapVertex(e.Location);
sr = document.Select(v, view);
}
else
{
//框选
GISExtent extent = view.Rect2Extent(e.X, MouseStartX, e.Y, MouseStartY);
sr = document.Select(extent);
}
if (sr == SelectResult.OK || Control.ModifierKeys != Keys.Control)
{
UpdateMap();
UpdateAttributeWindow();
}
break;
case MOUSECOMMAND.Zoomin:
if (e.X == MouseStartX && e.Y == MouseStartY)
{
//单点放大
GISVertex MouseLocation = view.ToMapVertex(e.Location);
GISExtent E1 = view.getRealExtent();
double newwidth = E1.getWidth() * GISConst.ZoominFactor;
double newheight = E1.getHeight() * GISConst.ZoominFactor;
double newminx = MouseLocation.x - (MouseLocation.x - E1.getMinX()) * GISConst.ZoominFactor;
double newminy = MouseLocation.y - (MouseLocation.y - E1.getMinY()) * GISConst.ZoominFactor;
view.UpdateExtent(new GISExtent(newminx, newminx + newwidth, newminy, newminy + newheight));
}
else
{
//拉框放大
view.UpdateExtent(view.Rect2Extent(e.X, MouseStartX, e.Y, MouseStartY));
}
UpdateMap();
break;
case MOUSECOMMAND.Zoomout:
if (e.X == MouseStartX && e.Y == MouseStartY)
{
//单点缩小
GISExtent e1 = view.getRealExtent();
GISVertex mouselocation = view.ToMapVertex(e.Location);
double newwidth = e1.getWidth() / GISConst.ZoomoutFactor;
double newheight = e1.getHeight() / GISConst.ZoomoutFactor;
double newminx = mouselocation.x - (mouselocation.x - e1.getMinX()) / GISConst.ZoomoutFactor;
double newminy = mouselocation.y - (mouselocation.y - e1.getMinY()) / GISConst.ZoomoutFactor;
view.UpdateExtent(new GISExtent(newminx, newminx + newwidth, newminy, newminy + newheight));
}
else
{
//拉框缩小
GISExtent e3 = view.Rect2Extent(e.X, MouseStartX, e.Y, MouseStartY);
GISExtent e1 = view.getRealExtent();
double newwidth = e1.getWidth() * e1.getWidth() / e3.getWidth();
double newheight = e1.getHeight() * e1.getHeight() / e3.getHeight();
double newminx = e3.getMinX() - (e3.getMinX() - e1.getMinX()) * newwidth / e1.getWidth();
double newminy = e3.getMinY() - (e3.getMinY() - e1.getMinY()) * newheight / e1.getHeight();
view.UpdateExtent(new GISExtent(newminx, newminx + newwidth, newminy, newminy + newheight));
}
UpdateMap();
break;
case MOUSECOMMAND.Pan:
if (e.X != MouseStartX && e.Y != MouseStartY)
{
GISExtent e1 = view.getRealExtent();
GISVertex m1 = view.ToMapVertex(new Point(MouseStartX, MouseStartY));
GISVertex m2 = view.ToMapVertex(e.Location);
double newwidth = e1.getWidth();
double newheight = e1.getHeight();
double newminx = e1.getMinX() - (m2.x - m1.x);
double newminy = e1.getMinY() - (m2.y - m1.y);
view.UpdateExtent(new GISExtent(newminx, newminx + newwidth, newminy, newminy + newheight));
UpdateMap();
}
break;
}
}