Bind a value to other in WPF UserControl - wpf

I have an WPF UserControl that has a property IsSelected. In that control I have a Border(the control is circular, si I have a circle-Ellipse) around, that should appear only if the control IsSelected.
<GeometryDrawing>
<GeometryDrawing.Pen>
<!-- HERE ==> Thickness = IIF(IsSelected, 2, 0) -->
<Pen Brush="blue" Thickness="2"/>
</GeometryDrawing.Pen>
<GeometryDrawing.Geometry>
<GeometryGroup>
<EllipseGeometry x:Name="Border"
Center="0,0" RadiusX="5" RadiusY="5"/>
</GeometryGroup>
</GeometryDrawing.Geometry>
</GeometryDrawing>
How can I bind the pen's thickness?


You'll need a Control Template with TemplateBinding. You will also need a TypeConverter that will transform boolean value into thickness integer.
Something like:
<Pen Thickness="{TemplateBinding IsSelected,
Converter={StaticResource BooleanToSizeConverter}" />

Related

Wpf canvas grid with coordinates

I have following canvas Code:
<Canvas>
<Canvas.Background>
<DrawingBrush TileMode="Tile" Viewport="0,0,40,40"
ViewportUnits="Absolute">
<DrawingBrush.Drawing>
<GeometryDrawing>
<GeometryDrawing.Geometry>
<RectangleGeometry Rect="0,0,400,400"/>
</GeometryDrawing.Geometry>
<GeometryDrawing.Pen>
<Pen Brush="Red" Thickness="1"/>
</GeometryDrawing.Pen>
</GeometryDrawing>
</DrawingBrush.Drawing>
</DrawingBrush>
</Canvas.Background>
</Canvas>
This canvas generates a grid like you can find it on excel.Now I want to know if ist possible to generate the coordinates too. With cooridnates I mean that the first top row in the first fiels has a tiny text in it that says "A0" and the next one has "B0" and so every cell has coordinates like Excel.Would this be possible?

Fixing blurred lines that are drawn by DrawingBrush

This is my drawing brush:
<DrawingBrush x:Key="GridBrush" TileMode="Tile"
Viewport="0,0,60,30" ViewportUnits="Absolute"
Viewbox="0,0,60,30" ViewboxUnits="Absolute">
<DrawingBrush.Drawing>
<GeometryDrawing>
<GeometryDrawing.Geometry>
<GeometryGroup>
<LineGeometry EndPoint="0,30"/>
<LineGeometry EndPoint="60,0"/>
</GeometryGroup>
</GeometryDrawing.Geometry>
<GeometryDrawing.Pen>
<Pen Brush="DarkGray" Thickness="1" DashCap="Flat" >
<Pen.DashStyle>
<DashStyle Dashes="2,2"/>
</Pen.DashStyle>
</Pen>
</GeometryDrawing.Pen>
</GeometryDrawing>
</DrawingBrush.Drawing>
</DrawingBrush>
This is where I use it:
<Border Width="721" Background="{StaticResource GridBrush}" UseLayoutRounding="True" SnapsToDevicePixels="True" >
And the effects is:
Basically the middle line is "okish" the other two are wider then they should. I tried using UseLayoutRounding, SnapsToDevicePixels but with or without those options nothing changes. I ran out of ideas by now :/

XAML graphic vector as image source

Now many graphics designers provide the images as xaml file not ico, png, ..., How can I use a xaml file as image source?
Thanks

From the MSDN
<Image>
<Image.Source>
<DrawingImage PresentationOptions:Freeze="True">
<DrawingImage.Drawing>
<GeometryDrawing>
<GeometryDrawing.Geometry>
<GeometryGroup>
<EllipseGeometry Center="50,50" RadiusX="45" RadiusY="20" />
<EllipseGeometry Center="50,50" RadiusX="20" RadiusY="45" />
</GeometryGroup>
</GeometryDrawing.Geometry>
<GeometryDrawing.Brush>
<LinearGradientBrush>
<GradientStop Offset="0.0" Color="Blue" />
<GradientStop Offset="1.0" Color="#CCCCFF" />
</LinearGradientBrush>
</GeometryDrawing.Brush>
<GeometryDrawing.Pen>
<Pen Thickness="10" Brush="Black" />
</GeometryDrawing.Pen>
</GeometryDrawing>
</DrawingImage.Drawing>
</DrawingImage>
</Image.Source>
</Image>
Instead of in-lining the GeometryDrawing you could refer to it as a static resource that you keep in a Resourcedictionary.
<Image>
<Image.Source>
<DrawingImage PresentationOptions:Freeze="True"
Drawing="{StaticResource myDrawing}">
</Image.Source>
</Image>
You will also find that you can show the drawing only once this way. So if you want this image to be present in the UI in multiple places, put the Image in a control template and style the controls with the template.

Thanks too all, this approach I know, my question was what happens when I have 100 xaml graphics files provided by a designer, now I have to extract the content from each file to move in a resource dictionary and set a key for each. I ask only if a more easy way as time.

Thank again too all.
I got a graphic like this
<Viewbox xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" Width="128" Height="128">
<Canvas Width="10240" Height="10240">
<Path Data="M5986 6814l828 -828c124,-124 328,-124 452,0l2428 2428c124,124 124,328 0,452l-828 828c-124,124 -328,124 -452,0l-2428 -2428c-124,-124 -124,-328 0,-452z" Fill="#EDC87E"/>
<Path Data="M6082 5442l412 412 -640 640 -412 -412c-534,401 -1197,638 -1916,638 -1764,0 -3194,-1430 -3194,-3194 0,-1764 1430,-3194 3194,-3194 1764,0 3194,1430 3194,3194 0,719 -237,1382 -638,1916zm-2556 -4471c-1411,0 -2555,1144 -2555,2555 0,1411 1144,2555 2555,2555 1411,0 2555,-1144 2555,-2555 0,-1411 -1144,-2555 -2555,-2555z" Fill="#808080"/>
</Canvas>
</Viewbox>
This can be user very easy as a content to a Content control, but to youse this for a control which requires Image source I cannot I have to transform to:
<DrawingImage>
<DrawingImage.Drawing>
<DrawingGroup>
<DrawingGroup.Children>
<GeometryDrawing Geometry="M5986 6814l828 -828c124,-124 328,-124 452,0l2428 2428c124,124 124,328 0,452l-828 828c-124,124 -328,124 -452,0l-2428 -2428c-124,-124 -124,-328 0,-452z" Brush="#EDC87E">
<GeometryDrawing.Pen>
<Pen Thickness="1000" Brush="Blue"></Pen>
</GeometryDrawing.Pen>
</GeometryDrawing>
<GeometryDrawing Geometry="M6082 5442l412 412 -640 640 -412 -412c-534,401 -1197,638 -1916,638 -1764,0 -3194,-1430 -3194,-3194 0,-1764 1430,-3194 3194,-3194 1764,0 3194,1430 3194,3194 0,719 -237,1382 -638,1916zm-2556 -4471c-1411,0 -2555,1144 -2555,2555 0,1411 1144,2555 2555,2555 1411,0 2555,-1144 2555,-2555 0,-1411 -1144,-2555 -2555,-2555z" Brush="#808080"/>
</DrawingGroup.Children>
</DrawingGroup>
</DrawingImage.Drawing>
</DrawingImage>
The work in to trivial :(

DrawingBrush to WPF DataGrid cells as Background

I'd like to set a DrawingBrush to DataGridCelland I use
<DrawingBrush TileMode="Tile" ViewportUnits="RelativeToBoundingBox" Viewport="0,0,0.05,1">
<DrawingBrush.Drawing>
<DrawingGroup>
<GeometryDrawing>
<GeometryDrawing.Pen>
<Pen Brush="Gray" Thickness="0.05"/>
</GeometryDrawing.Pen>
<GeometryDrawing.Geometry>
<LineGeometry StartPoint="0,1" EndPoint="1,0" />
</GeometryDrawing.Geometry>
</GeometryDrawing>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
I have undesired result when DataGridCells have unequal widths like below.
How should I change the Brush so that regardles of the widht of the individual cells the result would look like this.

Change ViewportUnits from RelativeToBoundingBox to Absolute and adjust Viewport.
The coordinate system is not relative to a bounding box. Values are interpreted directly in local space.
Something like this:
<DrawingBrush
x:Key="DrawingBrush"
TileMode="Tile"
ViewportUnits="Absolute"
Viewport="0,0,5,15">
which looks like this

How to create a Brush with a background in WPF?

I want to create a brush that draws a ellipse on the top-right corner, I tried this:
<DrawingBrush Stretch="None" AlignmentX="Right" AlignmentY="Top">
<DrawingBrush.Drawing>
<GeometryDrawing Brush="Green">
<GeometryDrawing.Geometry>
<EllipseGeometry RadiusX="60.0" RadiusY="60.0" />
</GeometryDrawing.Geometry>
</GeometryDrawing>
</DrawingBrush.Drawing>
</DrawingBrush>
The ellipse is in its position, but the rest area is transparent. Can I create a brush that draws an ellipse on the top-right corner with a non-transparent background? Can I use another brush as background?

Your DrawingBrush can contain a DrawingGroup with multiple drawings, each with its own brush. Here I have added a pale green RectangleGeometry that fits behind your ellipse and serves as the background:
<DrawingBrush Stretch="None" AlignmentX="Right" AlignmentY="Top">
<DrawingBrush.Drawing>
<DrawingGroup>
<GeometryDrawing Brush="PaleGreen">
<GeometryDrawing.Geometry>
<RectangleGeometry Rect="-60,-60,120,120" />
</GeometryDrawing.Geometry>
</GeometryDrawing>
<GeometryDrawing Brush="Green">
<GeometryDrawing.Geometry>
<EllipseGeometry RadiusX="60.0" RadiusY="60.0" />
</GeometryDrawing.Geometry>
</GeometryDrawing>
</DrawingGroup>
</DrawingBrush.Drawing>
</DrawingBrush>
Given the requirement to have the background fill all available space, I recommend giving the Window.Background the fill brush and then overlaying another element in the upper right corner to contain the ellipse.

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