topic Re: DrawGraphics Tools...can text be added? in ArcGIS API for Silverlight Questions

DrawGraphics Tools...can text be added?

ChristineZeller — Mon, 30 Jul 2012 16:29:47 GMT

Is there a way to write Text (similar to Flex draw graphic tools)

http://resources.arcgis.com/en/help/silverlight-api/samples/start.htm#DrawGraphics

Thanks
Christine

Re: DrawGraphics Tools...can text be added?

TerryGiles — Sat, 11 Dec 2021 20:18:19 GMT

What I've done is set the DrawMode to Point and then put the text the user types in a textbox at that point - code snippet below. Might work for other DrawMode geometry types too, just haven't tried it.

void Draw_DrawComplete(object sender, DrawEventArgs e)
        {
            GraphicsLayer gl = _Map.Layers[_glayer] as GraphicsLayer;

            if (_bolText)  //if user selected text from drawing options
            {
                (_symbol as TextSymbol).Text = txtText.Text;
                txtText.Text = string.Empty;
                spText.Visibility = Visibility.Collapsed;
            }

            Graphic g = new Graphic() 
            {
                Geometry = e.Geometry,
                Symbol = _symbol
            };

            gl.Graphics.Add(g);

            gl.Refresh();

            _Draw.IsEnabled = false;
            _Draw.DrawMode = DrawMode.None;
        }

Re: DrawGraphics Tools...can text be added?

nakulmanocha — Tue, 31 Jul 2012 22:07:57 GMT

You can add the TextSymbol as Graphic to the Map. Here is a sample

http://resources.arcgis.com/en/help/silverlight-api/samples/start.htm#AddGraphicsXAML

               <esri:Graphic>
                        <esri:Graphic.Symbol>
                            <esri:TextSymbol FontFamily="Arial" FontSize="14" Foreground="Black" Text="My Text" />
                        </esri:Graphic.Symbol>
                        <esri:MapPoint X="-10.609" Y="23.729">
                            <esri:Geometry.SpatialReference >
                                <esri:SpatialReference WKID="4326" />
                            </esri:Geometry.SpatialReference>
                        </esri:MapPoint>
                    </esri:Graphic>

Another way to use a ElementLayer and add a textBox. Here is a sample using ElementLayer
http://resources.arcgis.com/en/help/silverlight-api/samples/start.htm#ElementLayer

Re: DrawGraphics Tools...can text be added?

ChristineZeller — Sat, 11 Dec 2021 20:18:22 GMT

void Draw_DrawComplete(object sender, DrawEventArgs e)
        {
            GraphicsLayer gl = _Map.Layers[_glayer] as GraphicsLayer;

            if (_bolText)  //if user selected text from drawing options
            {
                (_symbol as TextSymbol).Text = txtText.Text;
                txtText.Text = string.Empty;
                spText.Visibility = Visibility.Collapsed;
            }

            Graphic g = new Graphic() 
            {
                Geometry = e.Geometry,
                Symbol = _symbol
            };

            gl.Graphics.Add(g);

            gl.Refresh();

            _Draw.IsEnabled = false;
            _Draw.DrawMode = DrawMode.None;
        }

Terry thanks for the post. I step away from this awhile but I'm back and I'm having trouble figure out what is

if (_bolText) //if user selected text from drawing options

Base on your comment it is checking to see if the user selected the text draw button but I'm not sure how and where to set and define _bolText?

Also what is spText?
spText.Visibility = Visibility.Collapsed;

Thanks Christine

Re: DrawGraphics Tools...can text be added?

ChristineZeller — Sun, 12 Dec 2021 16:29:56 GMT

Terry, Sorry for all the post I think I have the bool but still running into a empty error so I'm wondering if you are binding the text somehow. I figured I would paste my code and maybe you would have time to take a look.

It is failing at the line (_activeSymbol as TextSymbol).Text = txtText.Text; and stating object null but i have text in my textbox so I'm wonding what I"m missing.
XAML

  <StackPanel Orientation="Vertical" Margin="3">
                        <StackPanel x:Name="MyStackPanel" Orientation="Horizontal">
                            <Button Tag="DrawPoint" Margin="5" Click="Tool_Click" 
                                ToolTipService.ToolTip="Add a point">
                                <Image Source="images/DrawPoint.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawPolyline" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a polyline">
                                <Image Source="images/DrawPolyline.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawPolygon" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a polygon">
                                <Image Source="images/DrawPolygon.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawRectangle" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a rectangle">
                                <Image Source="images/DrawRectangle.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawFreehand" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a freehand line">
                                <Image Source="images/DrawFreehand.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawArrow" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add an arrow">
                                <Image Source="images/DrawArrow2.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawTriangle" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a triangle">
                                <Image Source="images/DrawTriangle2.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawCircle" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a circle">
                                <Image Source="images/DrawCircle2.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawEllipse" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add an ellipse">
                                <Image Source="images/DrawEllipse2.png" Margin="2" />
                            </Button>
                            <Button Tag="EnterText" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add text">
                                <Image Source="images/text.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawNothing" Margin="5" Click="Tool_Click"
                                 Style="{x:Null}"
                                ToolTipService.ToolTip="Unselect Current Tool">
                                <Image Source="images/dismiss.png" Margin="2" />
                            </Button>
                            <Button Tag="ClearStopDraw" Margin="5" Click="Tool_Click"
                                Style="{x:Null}"
                                ToolTipService.ToolTip="Clear graphics">
                                <Image Source="images/StopDraw.png" Margin="2" />
                            </Button>
                        </StackPanel>

                        <CheckBox x:Name="EnableEditVerticesScaleRotate" Content="Click on geometry to edit" 
                          IsChecked="False" Foreground="Black" FontWeight="Bold" Margin="10,5,5,5" />

                        <TextBox x:Name="txtText" Text="" />
                        
                    </StackPanel>

CODE BEHIND



 private void MyDrawObjectGraphic_DrawComplete(object sender, ESRI.ArcGIS.Client.DrawEventArgs args)
        {

            if (_bolText)  //if user selected text from drawing options
            {
                (_activeSymbol as TextSymbol).Text = txtText.Text;  //FAILING HERE STATING NULL
                txtText.Text = string.Empty;
               // spText.Visibility = Visibility.Collapsed;
            }

            ESRI.ArcGIS.Client.Graphic graphic = new ESRI.ArcGIS.Client.Graphic()
            {
                Geometry = args.Geometry,
                Symbol = _activeSymbol,
            };
            graphicsLayer.Graphics.Add(graphic);


            graphicsLayer.Refresh();

            
        }

        private void GraphicsLayerG_MouseLeftButtonUp(object sender, GraphicMouseButtonEventArgs e)
        {
            if (EnableEditVerticesScaleRotate.IsChecked.Value)
            {
                MyDrawObjectGraphic.DrawMode = DrawMode.None;
                UnSelectTools();
                Editor editor = LayoutRoot.Resources["MyGraphicEditor"] as Editor;
                if (e.Graphic != null && !(e.Graphic.Geometry is ESRI.ArcGIS.Client.Geometry.MapPoint))
                    editor.EditVertices.Execute(e.Graphic);
            }
        }

        private void UnSelectTools()
        {
            foreach (UIElement element in MyStackPanel.Children)
                if (element is Button)
                    VisualStateManager.GoToState((element as Button), "UnSelected", false);
        }

        private void Tool_Click(object sender, RoutedEventArgs e)
        {
            UnSelectTools();

            VisualStateManager.GoToState(sender as Button, "Selected", false);

            switch ((sender as Button).Tag as string)
            {
                case "DrawPoint":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Point;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicMarkerSymbol"] as Symbol;
                    break;
                case "DrawPolyline":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Polyline;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicLineSymbol"] as Symbol;
                    break;
                case "DrawPolygon":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Polygon;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "DrawRectangle":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Rectangle;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "DrawFreehand":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Freehand;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicLineSymbol"] as Symbol;
                    break;
                case "DrawArrow":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Arrow;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "DrawTriangle":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Triangle;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "DrawCircle":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Circle;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "DrawEllipse":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Ellipse;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "EnterText":
                     MyDrawObjectGraphic.DrawMode = DrawMode.Point;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicMarkerSymbol"] as Symbol;
                    _bolText = true;
                    break;
                case "DrawNothing":
                    MyDrawObjectGraphic.DrawMode = DrawMode.None;
                    break;
                default:
                    MyDrawObjectGraphic.DrawMode = DrawMode.None;
                    graphicsLayer.ClearGraphics();
                    break;
            }
            MyDrawObjectGraphic.IsEnabled = (MyDrawObjectGraphic.DrawMode != DrawMode.None);
        }

Re: DrawGraphics Tools...can text be added?

TerryGiles — Fri, 02 Nov 2012 14:50:46 GMT

Hi Christine,

Before you get into the Switch statement in the Tool_Click routine, reset _bolText to false, otherwise, if the user draws some text and then tries to draw a point/line/ploy afterwards _bolText will still be true it will pass your if _bolText test.

Hope that helps, Terry

Re: DrawGraphics Tools...can text be added?

ChristineZeller — Sat, 11 Dec 2021 20:18:25 GMT

Hi Christine,

Before you get into the Switch statement in the Tool_Click routine, reset _bolText to false, otherwise, if the user draws some text and then tries to draw a point/line/ploy afterwards _bolText will still be true it will pass your if _bolText test.

Hope that helps, Terry

I type text in my text box, click on the text button - it goes through the Tool_Click, goes through my switch and finds the

case "EnterText":
                     MyDrawObjectGraphic.DrawMode = DrawMode.Point;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicMarkerSymbol"] as Symbol;
                    _bolText = true;
                    break;

Then It allows me to click where I want to place the text and it fails on MyDrawObjectGraphic_DrawComplete at at the line (_activeSymbol as TextSymbol).Text = txtText.Text; and states it null

 private void MyDrawObjectGraphic_DrawComplete(object sender, ESRI.ArcGIS.Client.DrawEventArgs args)
        {

            if (_bolText)  //if user selected text from drawing options
            {
                (_activeSymbol as TextSymbol).Text = txtText.Text;
                txtText.Text = string.Empty;
               // spText.Visibility = Visibility.Collapsed;
            }

            ESRI.ArcGIS.Client.Graphic graphic = new ESRI.ArcGIS.Client.Graphic()
            {
                Geometry = args.Geometry,
                Symbol = _activeSymbol,
            };
            graphicsLayer.Graphics.Add(graphic);


            graphicsLayer.Refresh();

            
        }

Hey Terry I added the reset for _bolText before the switch but I'm still running into the same error, I've attached a screen shot in debug mode...any other ideas?

Re: DrawGraphics Tools...can text be added?

TerryGiles — Mon, 26 Nov 2012 14:56:35 GMT

Christine,

In your switch statement, it looks like _activeSymbol is getting set to a MarkerSymbol for the 'EnterText' case. Try making a TextSymbol instead, example below.

                    activeSymbol = new TextSymbol()                     {                         Text = "",                         FontSize = 12,                         Foreground = new SolidColorBrush(clr),                         FontFamily = new FontFamily("Arial"),                     };

Re: DrawGraphics Tools...can text be added?

ChristineZeller — Mon, 26 Nov 2012 17:08:52 GMT

Terry,

Thanks that worked! I was hoping to maybe ask you one more thing?

If I add text (ex. Test) and then add text again (ex. 2nd Text) the first text (Test) gets changed to the second text (2nd Text) upon adding the 2nd text item. Is there a way to stop this and preserve the first text item?

Thanks a bunch
Christine.

Re: DrawGraphics Tools...can text be added?

TerryGiles — Tue, 27 Nov 2012 13:08:38 GMT

Christine,

Can you post your revised code for the DrawComplete & button click methods?

Re: DrawGraphics Tools...can text be added?

ChristineZeller — Sat, 11 Dec 2021 20:18:28 GMT

Here's my xmal toolbar:

        <!-- Selectable Tools Window-->

        <userControls:DraggableWindow IsOpen="False" x:Name="DrawGraphicToolbar" IsDraggable="True" VerticalAlignment="Top" 
            HorizontalAlignment="Left" Margin="450,110,0,15" 
                                      Effect="{StaticResource dropShadow}" 
                                      Background="Black" Title="DRAW GRAPHIC TOOLS">




            <Grid HorizontalAlignment="Left" VerticalAlignment="Top" Width="Auto" Height="Auto" >

                <Border Effect="{StaticResource miniDropShadow}" Style="{StaticResource RibbonElementBorder}" Padding="15" Margin="10">


                    <!--<Grid Margin="10" Background="White">-->
                    <StackPanel Orientation="Vertical" Margin="3">
                        <StackPanel x:Name="MyStackPanel" Orientation="Horizontal">
                            <Button Tag="DrawPoint" Margin="5" Click="Tool_Click" 
                                ToolTipService.ToolTip="Add a point">
                                <Image Source="images/DrawPoint.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawPolyline" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a polyline">
                                <Image Source="images/DrawPolyline.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawPolygon" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a polygon">
                                <Image Source="images/DrawPolygon.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawRectangle" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a rectangle">
                                <Image Source="images/DrawRectangle.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawFreehand" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a freehand line">
                                <Image Source="images/DrawFreehand.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawArrow" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add an arrow">
                                <Image Source="images/DrawArrow2.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawTriangle" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a triangle">
                                <Image Source="images/DrawTriangle2.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawCircle" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add a circle">
                                <Image Source="images/DrawCircle2.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawEllipse" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add an ellipse">
                                <Image Source="images/DrawEllipse2.png" Margin="2" />
                            </Button>
                            <Button Tag="EnterText" Margin="5" Click="Tool_Click"
                                ToolTipService.ToolTip="Add text">
                                <Image Source="images/text.png" Margin="2" />
                            </Button>
                            <Button Tag="DrawNothing" Margin="5" Click="Tool_Click"
                                 Style="{x:Null}"
                                ToolTipService.ToolTip="Unselect Current Tool">
                                <Image Source="images/dismiss.png" Margin="2" />
                            </Button>
                            <Button Tag="ClearStopDraw" Margin="5" Click="Tool_Click"
                                Style="{x:Null}"
                                ToolTipService.ToolTip="Clear graphics">
                                <Image Source="images/StopDraw.png" Margin="2" />
                            </Button>
                        </StackPanel>

                        <CheckBox x:Name="EnableEditVerticesScaleRotate" Content="Click on geometry to edit" 
                          IsChecked="False" Foreground="Black" FontWeight="Bold" Margin="10,5,5,5" />

                        <TextBox x:Name="txtText" Text="test" />
                        
                    </StackPanel>
                    
                    <!--</Grid>-->


                </Border>

            </Grid>

        </userControls:DraggableWindow>

Here's my code behind:

 private void MyDrawObjectGraphic_DrawComplete(object sender, ESRI.ArcGIS.Client.DrawEventArgs args)
        {
           

            if (_bolText)  //if user selected text from drawing options
            {
                //MessageBox.Show(txtText.Text);
                //_activeSymbol = LayoutRoot.Resources["DefaultGraphicMarkerSymbol"] as Symbol;
                //string test = txtText.Text;
                //(_activeSymbol as TextSymbol).Text = test;
                //MessageBox.Show(test);
                (_activeSymbol as TextSymbol).Text = txtText.Text;
                txtText.Text = string.Empty;
               // spText.Visibility = Visibility.Collapsed;
            }

            ESRI.ArcGIS.Client.Graphic graphic = new ESRI.ArcGIS.Client.Graphic()
            {
                Geometry = args.Geometry,
                Symbol = _activeSymbol,
            };
            graphicsLayer.Graphics.Add(graphic);


            graphicsLayer.Refresh();
  }

  private void Tool_Click(object sender, RoutedEventArgs e)
        {
            UnSelectTools();

            VisualStateManager.GoToState(sender as Button, "Selected", false);
            _bolText = false;

            switch ((sender as Button).Tag as string)
            {
                case "DrawPoint":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Point;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicMarkerSymbol"] as Symbol;
                    break;
                case "DrawPolyline":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Polyline;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicLineSymbol"] as Symbol;
                    break;
                case "DrawPolygon":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Polygon;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "DrawRectangle":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Rectangle;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "DrawFreehand":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Freehand;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicLineSymbol"] as Symbol;
                    break;
                case "DrawArrow":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Arrow;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "DrawTriangle":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Triangle;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "DrawCircle":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Circle;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "DrawEllipse":
                    MyDrawObjectGraphic.DrawMode = DrawMode.Ellipse;
                    _activeSymbol = LayoutRoot.Resources["DefaultGraphicFillSymbol"] as Symbol;
                    break;
                case "EnterText":
                     MyDrawObjectGraphic.DrawMode = DrawMode.Point;
                    //_activeSymbol = LayoutRoot.Resources["DefaultGraphicMarkerSymbol"] as Symbol;
                     _activeSymbol = new TextSymbol()
                     {
                         Text = "",
                         FontSize = 12,
                     //    Foreground = new SolidColorBrush(clr),
                         FontFamily = new FontFamily("Arial"),
                     };
                    _bolText = true;
                    break;
                case "DrawNothing":
                    MyDrawObjectGraphic.DrawMode = DrawMode.None;
                    break;
                default:
                    MyDrawObjectGraphic.DrawMode = DrawMode.None;
                    graphicsLayer.ClearGraphics();
                    break;
            }
            MyDrawObjectGraphic.IsEnabled = (MyDrawObjectGraphic.DrawMode != DrawMode.None);
        }

Thanks

Re: DrawGraphics Tools...can text be added?

TerryGiles — Sat, 11 Dec 2021 20:18:31 GMT

Christine,

I can reproduce the same behavior here. The only difference in you DrawComplete handler and mine is I have the following 2 lines after I refresh the graphicslayer -

_Draw.IsEnabled = false;
_Draw.DrawMode = DrawMode.None;

Where _Draw is my Draw object. If I comment these 2 lines out, I see the behavior you're describing. My guess it's related to the re-use of the global _activesymbol variable here -

(_activesymbol as TextSymbol).Text = txtText.Text;

any graphic referencing _activesymbol will get changed.

With the 2 lines above added to disable the Draw object, I'm forcing my users to click a button again (point, line, poly, or text) which recreates _activesymbol as a new Symbol instead of just altering it's properties.

I'm sure there's a much better way to explain that, but that's what I see happening.

Hope that helps, Terry