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Rectangle drawing

#1

Hi,


I have to draw a rectangle( transparent)  on mouse click selection. How to proceed for this ? ?



#2

Sneha,


Thanks for your post and questions.
 
Try following code snippet shows how to track a transparent rectangle; also, I attached the result for it.
 

 
Any more questions please feel free to let me know.
 
Thanks.
 
Yale

#3

Hi, 
  
 I didn’t receive your code . Will you please attach it again !! 
  
 Thanks, 
 Sneha

#4

Sneha,


I'm sorry that Yale forgot to attach the code snippet to you, here is the code snippet below for your requirements:



    public AddFeaturesFromAFeatureLayer()
        {
            InitializeComponent();

            winformsMap1.MapClick += new EventHandler<MapClickWinformsMapEventArgs>(winformsMap1_MapClick);
        }

        private void AddFeaturesFromAFeatureLayer_Load(object sender, EventArgs e)
        {
            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;

            winformsMap1.CurrentExtent = new RectangleShape(0, 100, 100, 0);
            winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.StandardColors.White);

            InMemoryFeatureLayer inMemoryLayer = new InMemoryFeatureLayer();

            inMemoryLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.FillSolidBrush.Color = GeoColor.FromArgb(100, GeoColor.StandardColors.Transparent);
            inMemoryLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.OutlinePen.Color = GeoColor.StandardColors.Blue;
            inMemoryLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle.OuterPen = new GeoPen(GeoColor.FromArgb(200, GeoColor.StandardColors.Red), 5);
            inMemoryLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle.SymbolPen = new GeoPen(GeoColor.FromArgb(255, GeoColor.StandardColors.Green), 8);
            inMemoryLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

            LayerOverlay staticOverlay = new LayerOverlay();
            staticOverlay.Layers.Add("InMemoryFeatureLayer", inMemoryLayer);
            winformsMap1.Overlays.Add("InMemoryOverlay", staticOverlay);

            winformsMap1.Refresh();
        }

        private void winformsMap1_MapClick(object sender, MapClickWinformsMapEventArgs e)
        {
            InMemoryFeatureLayer inMemoryLayer = (InMemoryFeatureLayer)winformsMap1.FindFeatureLayer("InMemoryFeatureLayer");

            PointShape clickPoint = new PointShape(e.WorldX, e.WorldY);
            PointShape upperLeftPoint = new PointShape(clickPoint.X - 20, clickPoint.Y + 20);
            PointShape lowerRightPoint = new PointShape(clickPoint.X + 20, clickPoint.Y - 20);
            RectangleShape rectanglShape = new RectangleShape(upperLeftPoint, lowerRightPoint);

            if (inMemoryLayer.InternalFeatures.Count > 0)
            {
                inMemoryLayer.InternalFeatures.Clear();
            }

            inMemoryLayer.InternalFeatures.Add(new Feature(rectanglShape));

            winformsMap1.Refresh();
        }

Thanks,


Scott,



#5

Hi, 
  
 Thanks for your feedback. 
  
 In the above code, the rectangle drawn is fixed . I need to draw the rectangle according to the user’s  mouse click or drag events. 
 How to achieve this ??

#6

Sneha,


Here is the code snippet for your requirements below:



                        winformsMap1.TrackOverlay.TrackMode = TrackMode.Rectangle;
                        winformsMap1.TrackOverlay.TrackShapeLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.FillSolidBrush.Color = GeoColor.FromArgb(100, GeoColor.StandardColors.Transparent);
                        winformsMap1.TrackOverlay.TrackShapeLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.OutlinePen.Color = GeoColor.StandardColors.Blue;
                        winformsMap1.TrackOverlay.TrackShapeLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

The code above allows you to draw the transparent rectangle according to your mouse drag event.


Thanks,


Scott,



#7

Hi, 
  
 Thanks for the feedback…

#8

Sneha, 
  
 Any more questions please let us know again, 
  
 Thanks, 
  
 Scott,

#9

Hi, 
  
 The above code draws a rectangle. But as soon as the mouse button is up the rectangle also goes off. I want the rectangle to remain. It should go off on mouse double click… 
  


#10

Sneha, 
  
 I tested it, when the mouse button is up the rectangle would not be disappear. Please get the latest version to try again, 
  
 Thanks, 
  
 Scott,