public override void OnCreate(HookHelper hook)
{
Name = "绘制多边形";
mMapCtrl = hook.MapControl as RgMapControl;
mScreenDisplay = mMapCtrl.ScreenDisplay;
mScreenDisplayDraw = mScreenDisplay as IScreenDisplayDraw;
}
protected override void OnPaint(PaintEventArgs e)
{
e.Graphics.SmoothingMode = m_smoothingMode;
if (mScreenDisplay.IsCacheDirty)
{
mScreenDisplay.StartRecording();
mScreenDisplay.StartDrawing(e.Graphics, 0);
mMap.Draw(mScreenDisplay);
object newObj = mScreenDisplay.NewObject;
if (newObj != null)
{
IScreenDisplayDraw drawNew = mScreenDisplay as IScreenDisplayDraw;
if (newObj is LineString)
{
Pen mpen = new Pen(Color.Blue);
drawNew.DrawLineString(newObj as LineString, mpen);
}
else if (newObj is MultiLineString)
{
Pen mpen = new Pen(Color.Blue);
drawNew.DrawMultiLineString(newObj as MultiLineString, mpen);
}
else if (newObj is Polygon)
{
Brush brush = new SolidBrush(Color.Blue);
drawNew.DrawPolygon(newObj as Polygon, brush, Pens.AliceBlue, false);
}
}
mScreenDisplay.FinishDrawing();
mScreenDisplay.StopRecording();
}
}
public override void Draw(IScreenDisplay display)
{
IScreenDisplayDraw displayDraw = display as IScreenDisplayDraw;
if (ShapeType == RgEnumShapeType.RgPoint)
{
for (int i = 0; i < mGeometries.Count; i++)
{
RGeos.Geometries.Point pt = mGeometries[i] as RGeos.Geometries.Point;
if (pt != null)
{
displayDraw.DrawPoint(pt, new Pen(Color.Red));
}
}
}
if (ShapeType == RgEnumShapeType.RgLineString)
{
for (int i = 0; i < mGeometries.Count; i++)
{
LineString pt = mGeometries[i] as LineString;
if (pt != null)
{
displayDraw.DrawLineString(pt, new Pen(Color.Red));
// display as r
}
}
}
if (ShapeType == RgEnumShapeType.RgMultiLineString)
{
for (int i = 0; i < mGeometries.Count; i++)
{
MultiLineString pt = mGeometries[i] as MultiLineString;
if (pt != null)
{
displayDraw.DrawMultiLineString(pt, new Pen(Color.Red));
}
}
}
if (ShapeType == RgEnumShapeType.RgPolygon)
{
for (int i = 0; i < mGeometries.Count; i++)
{
Polygon pt = mGeometries[i] as Polygon;
if (pt != null)
{
Pen mPen = new Pen(Color.Red);
Brush brush = new SolidBrush(Color.Blue);
displayDraw.DrawPolygon(pt, brush, mPen, false);
}
}
}
}
public override void OnMouseDown(int x, int y, System.Windows.Forms.MouseEventArgs e)
{
RgPoint P1 = mScreenDisplay.DisplayTransformation.ToUnit(new System.Drawing.PointF(x, y));
Graphics g = Graphics.FromHwnd(mMapCtrl.Handle);
mScreenDisplay.StartDrawing(g, 1);
IScreenDisplayDraw mScreenDisplayDraw = mScreenDisplay as IScreenDisplayDraw;
mScreenDisplayDraw.DrawPoint(P1, new System.Drawing.Pen(System.Drawing.Color.Yellow), new System.Drawing.SolidBrush(System.Drawing.Color.Yellow));
mScreenDisplay.FinishDrawing();
g.Dispose();
if (PickUpFinishedEventHandler != null)
{
PickUpFinishedEventHandler(P1);
}
//mMapCtrl.Refresh();
mPickedPoint = P1;
}
protected void DrawPoint(IScreenDisplay canvas, Pen pen, Brush fillBrush)
{
IScreenDisplayDraw canvasDraw = canvas as IScreenDisplayDraw;
Graphics dc = Graphics.FromHwnd(canvas.Handle);
PointF m_point1 = canvas.DisplayTransformation.ToScreen(m_snappoint);
dc.DrawRectangle(pen, m_point1.X - 3, m_point1.Y - 3, 6, 6);
Rectangle screenrect = new Rectangle((int)m_point1.X - 3, (int)m_point1.Y - 3, 6, 6);
screenrect.X++;
screenrect.Y++;
screenrect.Width--;
screenrect.Height--;
if (fillBrush != null)
{
dc.FillRectangle(fillBrush, screenrect);
}
dc.Dispose();
dc = null;
}
public override void Draw(IScreenDisplay display)
{
IScreenDisplayDraw displayDraw = display as IScreenDisplayDraw;
if (ShapeType == RgEnumShapeType.RgPoint)
{
for (int i = 0; i < mGeometries.Count; i++)
{
Feature feat = mGeometries[i];
RGeos.Geometries.RgPoint pt = feat.Shape as RGeos.Geometries.RgPoint;
if (pt != null)
{
if (feat.IsSelected == false)
{
displayDraw.DrawPoint(pt, new Pen(Color.Red), new SolidBrush(Color.Red));
}
else
{
displayDraw.DrawPoint(pt, new Pen(Color.LightBlue), new SolidBrush(Color.LightBlue));
}
}
}
}
if (ShapeType == RgEnumShapeType.RgLineString)
{
for (int i = 0; i < mGeometries.Count; i++)
{
Feature feat = mGeometries[i];
LineString pt = feat.Shape as LineString;
if (pt != null)
{
if (feat.IsSelected == false)
{
displayDraw.DrawLineString(pt, new Pen(Color.Red));
}
else
{
displayDraw.DrawLineString(pt, new Pen(Color.LightBlue));
}
// display as r
}
}
}
if (ShapeType == RgEnumShapeType.RgMultiLineString)
{
for (int i = 0; i < mGeometries.Count; i++)
{
Feature feat = mGeometries[i];
MultiLineString pt = feat.Shape as MultiLineString;
if (pt != null)
{
if (feat.IsSelected == false)
{
displayDraw.DrawMultiLineString(pt, new Pen(Color.Red));
}
else
{
displayDraw.DrawMultiLineString(pt, new Pen(Color.LightBlue));
}
}
}
}
if (ShapeType == RgEnumShapeType.RgPolygon)
{
for (int i = 0; i < mGeometries.Count; i++)
{
Feature feat = mGeometries[i];
Polygon polygon = feat.Shape as Polygon;
if (polygon != null)
{
Pen mPen = new Pen(Color.Red);
Brush brush = new SolidBrush(Color.Blue);
if (feat.IsSelected == false)
{
displayDraw.DrawPolygon(polygon, brush, mPen, false);
}
else
{
displayDraw.DrawPolygon(polygon, brush, new Pen(Color.LightBlue), false);
}
}
}
}
}
