Using a cad file for a floor plan

[stevez]

I'm using Delphi 7 and ould like to illustrate the state of some sensors on a plant floor.

We would like to have 2 layers
1- floor plan,
2- a layer containing all the sensors as rectangles

I would like to be able to fill the rectangles with green if OK and Red if error.
I would also like to llow the user to click on a spreasheet and have the drawing zoom in on the selected sensor.

Thanks

[stevez]

Just a clarification,

The CAD drawings will be creted in AutoCAD, we mearly wish to manipulate objects on a specific layer - the sensor layer. [:D]

[support]

Hello,

The following code demonstrates how to get access to entities of the necessary layer ('WWW' in this example), how to make a simple action with them (for example to fill entity by red color) and how to zoom by mous click.

Code: Select all

<b>uses</b>
  ..., SGImage, DXFImage, DXFConv, sgConsts;

<b>type</b>
  TForm1 = <b>class</b>(TForm)
    ...
    sgImage1: TsgImage;
    ...
  <b>private</b>
    ...
    Img: TsgDXFImage;
    FCADParams: TsgCADIterate;
    <b>procedure</b> DoCADEntities(Entity: TsgDXFEntity);
    ...
  <b>end</b>;

//open file
<b>procedure</b> TForm1.Open1Click(Sender: TObject);
<b>begin
  if not</b> OpenDialog1.Execute <b>then</b> Exit;

  sgImage1.LoadFromFile(OpenDialog1.FileName);
  <b>if</b> sgImage1.Picture.Graphic <b>is</b> TsgDXFImage <b>then</b>
    Img := TsgDXFImage(sgImage1.Picture.Graphic)
  <b>else</b>
    Img := <b>nil</b>;
<b>end</b>;

//iterate through the all entities of the file
<b>procedure</b> TForm1.FindSensors1Click(Sender: TObject);
<b>begin</b>
  ...
  <b>if</b> Img = <b>nil then</b> Exit;
  Img.Converter.Params := @FCADParams;
  Img.CurrentLayout.Iterate(Img.Converter, DoCADEntities);
  ...
<b>end</b>;

//check whether rectangle belongs to the necessary layer ('WWW' for instance) and fill it by red color
<b>procedure</b> TForm1.DoCADEntities(Entity: TsgDXFEntity);
<b>var</b>
  L: TsgDXFLayer;
  vHighlightArea: array of TPoint;
  I: Integer;
  vPoint: TPoint;
<b>begin</b>
  L := EntLayer(Entity, FCADParams.Insert);
  <b>if</b> Entity <b>is</b> TsgDXFPolyLine <b>then
  begin
    if</b> L.Name = 'www' <b>then
    begin</b>
      SetLength(vHighlightArea, 0);
      <b>for</b> I := 0 <b>to</b> TsgDXFPolyline(Entity).PolyPoints.Count - 1 <b>do
      begin</b>
        vPoint := Img.GetPoint(TFPoint(TsgDXFPolyline(Entity).PolyPoints.Items[I]^));
        SetLength(vHighlightArea, Length(vHighlightArea) + 1);
        vHighlightArea[Length(vHighlightArea) - 1] := vPoint;
      <b>end</b>;
      sgImage1.Canvas.Brush.Color := clRed;
      sgImage1.Canvas.Polygon(vHighlightArea);
      sgImage1.Canvas.Brush.Color := clWhite;
    <b>end</b>;
  <b>end</b>;
<b>end</b>;

//zoom on left mouse click
<b>procedure</b> TForm1.sgImage1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
<b>var</b>
  vPoint: TPoint;
<b>begin</b>
  sgImage1.Zoom := false;
  vPoint.X := X;
  vPoint.Y := Y;
  <b>if</b> (Button = mbLeft) <b>and</b> (<b>not</b> sgImage1.Empty) <b>then</b>
    sgImage1.ChangeScale(False, 2, vPoint);

<b>end</b>;

Sergey

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