Height (DrawingAttributes)
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Gets or sets the height of the associated stroke.
<object Height="Double" .../>
value = object.Height
object.Height = value
Property Value
Type: Double
The height of the associated stroke.
This property is read/write. The default value is 3.0.
Remarks
The discrete Height and Width properties on the DrawingAttributes object supports creating an ink pen that has a horizontal/vertical stroke bias.
Example
The following JavaScript example simulates three pen types (pen, marker and highlighter) by setting the Color, Height, OutlineColor, and Width properties of a DrawingAttributes object. A DrawingAttributes object is first created, and then appended to the Stroke object. The DrawingAttributes properties are then set by one of the three events that simulate a pen type. The EraseCanvas event handler clears all the Strokes from the Canvas.
var agCtrl;
var inkPresenter; // Corresponds to InkPresenter element in XAML.
var newStroke = null; // The Stroke variable we'll use here in mouse handlers.
// DrawingAttributes variables
var daWidth = 2;
var daHeight = 2;
var daColor = "Black";
var daOutlineColor = "Black";
function root_Loaded(sender, args)
{
// Get the HTML object that contains the Silverlight plug-in.
agCtrl = sender.GetHost();
inkPresenter = sender.findname("inkPresenterElement");
}
// Capture mouse movement when the left button is pressed and create the stroke.
function InkPresenterMouseDown(sender,args)
{
inkPresenter.CaptureMouse();
newStroke = agCtrl.content.createFromXaml('<Stroke/>');
var da = agCtrl.content.CreateFromXaml('<DrawingAttributes/>');
newStroke.DrawingAttributes = da;
// Set the drawing attributes properties.
newStroke.DrawingAttributes.Width = daWidth;
newStroke.DrawingAttributes.Height = daHeight;
newStroke.DrawingAttributes.Color = daColor;
newStroke.DrawingAttributes.OutlineColor = daOutlineColor;
newStroke.StylusPoints.AddStylusPoints(args.GetStylusPoints(inkPresenter));
inkPresenter.Strokes.Add(newStroke);
}
// Add the new points to the Stroke we're working with.
function InkPresenterMouseMove(sender,args)
{
if (newStroke != null)
{
newStroke.StylusPoints.AddStylusPoints(args.GetStylusPoints(inkPresenter));
}
}
// Release the mouse.
function InkPresenterMouseUp(sender,args)
{
newStroke = null;
inkPresenter.ReleaseMouseCapture();
}
// Set the drawing attributes for a pen.
function SelectPen(sender, args)
{
daWidth = 1;
daHeight = 1;
daColor = "Black";
daOutlineColor = "Black";
}
// Set the drawing attributes for a marker.
function SelectMarker(sender, args)
{
daWidth = 10;
daHeight = 4;
daColor = "Blue";
daOutlineColor = "Blue";
}
// Set the drawing attributes for a highlighter.
function SelectHighlighter(sender, args)
{
daWidth = 25;
daHeight = 5;
daColor = "Yellow";
daOutlineColor = "Yellow";
}
// Erase all strokes from the canvas
function EraseCanvas(sender, args)
{
inkPresenter.Strokes.Clear();
}
The XAML sample below creates the canvas, the four buttons that are used to select the different pen types, and the Erase All feature that is simulated by the Javascript events in the preceding example.
<Canvas xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
Loaded="root_Loaded"
x:Name="root"
Width="600" Height="400">
<InkPresenter
x:Name="inkPresenterElement"
Background="transparent"
Width="600" Height="400"
MouseLeftButtonDown="InkPresenterMouseDown"
MouseMove="InkPresenterMouseMove"
MouseLeftButtonUp="InkPresenterMouseUp"/>
<!-- Pen Button -->
<Rectangle
Height="30" Width="125"
Canvas.Top="375" Canvas.Left="40"
Stroke="Gray" Fill="Black" StrokeThickness="1.5"
RadiusX="2" RadiusY="2"
Opacity="1.0"/>
<TextBlock
Height="21" Width="78"
Canvas.Top="380" Canvas.Left="71"
Foreground="Gray"
FontFamily="Verdana" FontSize="12">Select Pen</TextBlock>
<Rectangle
Height="30" Width="125"
Canvas.Top="375" Canvas.Left="40"
x:Name="selectPen" MouseLeftButtonDown="SelectPen"
Stroke="Transparent" Fill="Transparent" StrokeThickness="1.5"
RadiusX="2" RadiusY="2"
Opacity="1.0"/>
<!-- Marker Button -->
<Rectangle
Height="30" Width="125"
Canvas.Top="375" Canvas.Left="170"
Stroke="Gray" Fill="Black" StrokeThickness="1.5"
RadiusX="2" RadiusY="2"
Opacity="1.0"/>
<TextBlock
Height="21" Width="78"
Canvas.Top="380" Canvas.Left="191"
Foreground="Gray"
FontFamily="Verdana" FontSize="12">Select Marker</TextBlock>
<Rectangle
Height="30" Width="125"
Canvas.Top="375" Canvas.Left="170"
x:Name="selectMarker" MouseLeftButtonDown="SelectMarker"
Stroke="Transparent" Fill="Transparent" StrokeThickness="1.5"
RadiusX="2" RadiusY="2"
Opacity="1.0"/>
<!-- Highlighter Button -->
<Rectangle
Height="30" Width="125"
Canvas.Top="375" Canvas.Left="300"
Stroke="Gray" Fill="Black" StrokeThickness="1.5"
RadiusX="2" RadiusY="2"
Opacity="1.0"/>
<TextBlock
Height="21" Width="78"
Canvas.Top="380" Canvas.Left="310"
Foreground="Gray"
FontFamily="Verdana" FontSize="12">Select Highlighter</TextBlock>
<Rectangle
Height="30" Width="125"
Canvas.Top="375" Canvas.Left="300"
x:Name="selectHighlighter" MouseLeftButtonDown="SelectHighlighter"
Stroke="Transparent" Fill="Transparent" StrokeThickness="1.5"
RadiusX="2" RadiusY="2"
Opacity="1.0"/>
<!-- Erase Canvas Button -->
<Rectangle
Height="30" Width="125"
Canvas.Top="375" Canvas.Left="430"
Stroke="Gray" Fill="Black" StrokeThickness="1.5"
RadiusX="2" RadiusY="2"
Opacity="1.0"/>
<TextBlock
Height="21" Width="78"
Canvas.Top="380" Canvas.Left="463"
Foreground="Gray"
FontFamily="Verdana" FontSize="12">Erase All</TextBlock>
<Rectangle
Height="30" Width="125"
Canvas.Top="375" Canvas.Left="430"
x:Name="eraseCanvas" MouseLeftButtonDown="EraseCanvas"
Stroke="Transparent" Fill="Transparent" StrokeThickness="1.5"
RadiusX="2" RadiusY="2"
Opacity="1.0"/>
</Canvas>