Ellipse with CombinedGeometry - wpf

I have this ellipse:
<Ellipse Name="backgroundEllipse1" Fill="Pink">
<Ellipse.Clip>
<CombinedGeometry GeometryCombineMode="Exclude">
<CombinedGeometry.Geometry1>
<EllipseGeometry x:Name="backgroundEllipseMask1" Center="150,150" RadiusX="300" RadiusY="300"></EllipseGeometry>
</CombinedGeometry.Geometry1>
<CombinedGeometry.Geometry2>
<EllipseGeometry x:Name="backgroundEllipseMask2" Center="150,150" RadiusX="130" RadiusY="130"></EllipseGeometry>
</CombinedGeometry.Geometry2>
</CombinedGeometry>
</Ellipse.Clip>
</Ellipse>
How can I make something like this?
I'm trying to combine the center and Radius values but something escapes me.


You need an ArcSegment
<Canvas>
<Path Stroke="Pink" StrokeThickness="10" >
<Path.Data>
<PathGeometry>
<PathFigure StartPoint="400,400">
<ArcSegment IsLargeArc="True"
Size="100, 100"
Point="480, 410"
SweepDirection="Counterclockwise" />
</PathFigure>
</PathGeometry>
</Path.Data>
</Path>
</Canvas>
Note that the arc starts form (400,400) and ends in (480,410). It moves Counterclockwise and is a large arc. Size="100, 100" determines the size of the Ellipse (or Circle if they are equal) This post can help you.

Related

shared area of two shapes in wpf

I'm making an app that is a venn diagram and I don't know how to do the first step. There are to ellipses and I want to color the shared area of two ellipses.
The green area is the shared area I meant.

You can use intersect mode on a combinedgeometry to find the parts overlap:
<Grid>
<Grid.Background>
<VisualBrush Stretch="None">
<VisualBrush.Visual>
<Canvas>
<Path Fill="Yellow">
<Path.Data>
<EllipseGeometry Center="150,50" RadiusX="75" RadiusY="75" />
</Path.Data>
</Path>
<Path Fill="Yellow">
<Path.Data>
<EllipseGeometry Center="50,50" RadiusX="75" RadiusY="75" />
</Path.Data>
</Path>
<Path Fill="Green">
<Path.Data>
<CombinedGeometry GeometryCombineMode="Intersect">
<CombinedGeometry.Geometry1>
<EllipseGeometry Center="150,50" RadiusX="75" RadiusY="75"/>
</CombinedGeometry.Geometry1>
<CombinedGeometry.Geometry2>
<EllipseGeometry Center="50,50" RadiusX="75" RadiusY="75"/>
</CombinedGeometry.Geometry2>
</CombinedGeometry>
</Path.Data>
</Path>
</Canvas>
</VisualBrush.Visual>
</VisualBrush>
</Grid.Background>
Position textblocks in the grid on top of the background shapes using rows and columns.
Or just put everything in a canvas rather than using a visualbrush.
Use Canvas.Left and Canvas.Top to position some textblocks on top of the ellipses.

How to draw a circle with x mark?

I'm trying to draw a circle with perfect X mark.
I managed to draw a circle with half of the X mark. I'm not sure how to draw the second half.
Thank you
<Path Stroke="Black"
StrokeThickness="4" Fill="Red" VerticalAlignment="Center" HorizontalAlignment="Center">
<Path.Data>
<PathGeometry>
<PathGeometry.Figures>
<PathFigure StartPoint="0,0">
<PathFigure.Segments>
<LineSegment Point="100,100" />
<ArcSegment Size="50,50"
RotationAngle="45"
IsLargeArc="True"
SweepDirection="Clockwise"
Point="0,0" />
<ArcSegment Size="50,50"
RotationAngle="45"
IsLargeArc="True"
SweepDirection="Clockwise"
Point="100,100" />
</PathFigure.Segments>
</PathFigure>
</PathGeometry.Figures>
</PathGeometry>
</Path.Data>
</Path>

You can "simplify" this, or at least make it take up less space in the XAML editor, by using Path Markup Syntax. The portion of Data before the blank line reproduces what you've already got: M for "move", L for "line to", A for "arc". The "Move" and "Line To" commands after the blank line add the second line.
<Path
Stroke="Black"
StrokeThickness="4"
Fill="Red"
Data="
M 0,0
L 100,100
A 50,50 45 1 1 0,0
A 50,50 45 1 1 100,100
M 100,0
L 0,100"
/>
You don't need to format it with newlines like that; I just inserted the newlines to clarify how it maps onto your version. Fortunately, you added the attributes to your ArcSegment elements in the same order as the corresponding arguments to A in the markup syntax.
This is how it's usually done, though it's arguably less readable:
Data="M 0,0 L 100,100 A 50,50 45 1 1 0,0 A 50,50 45 1 1 100,100 M 100,0 L 0,100"
Alternatively, to finish it the same way you started, just add the second line as another PathFigure:
<Path
Stroke="Black"
StrokeThickness="4"
Fill="Red"
VerticalAlignment="Center"
HorizontalAlignment="Center">
<Path.Data>
<PathGeometry>
<PathGeometry.Figures>
<PathFigure StartPoint="0,0">
<PathFigure.Segments>
<LineSegment Point="100,100" />
<ArcSegment
Size="50,50"
RotationAngle="45"
IsLargeArc="True"
SweepDirection="Clockwise"
Point="0,0"
/>
<ArcSegment
Size="50,50"
RotationAngle="45"
IsLargeArc="True"
SweepDirection="Clockwise"
Point="100,100"
/>
</PathFigure.Segments>
</PathFigure>
<!-- Second line -->
<PathFigure StartPoint="100,0">
<PathFigure.Segments>
<LineSegment Point="0,100" />
</PathFigure.Segments>
</PathFigure>
<!-- /Second line -->
</PathGeometry.Figures>
</PathGeometry>
</Path.Data>
</Path>

use this...https://materialdesignicons.com/
<Viewbox Width="48" Height="48">
<Canvas Width="24" Height="24">
<Path Data="M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20,12C20,16.41 16.41,20 12,20M12,2C6.47,2 2,6.47 2,12C2,17.53 6.47,22 12,22C17.53,22 22,17.53 22,12C22,6.47 17.53,2 12,2M14.59,8L12,10.59L9.41,8L8,9.41L10.59,12L8,14.59L9.41,16L12,13.41L14.59,16L16,14.59L13.41,12L16,9.41L14.59,8Z" Fill="Black" />
</Canvas>

Fill for EllipseGeometry

I need to have some drawing (triangle and circle) as one object (to set it as content). Triangle should be filled and circle shouldn't be filled with color. The problem is that EllipseGeometry doesn't have IsFilled property. If I remove Fill property at Path both wouldn't be filled. How can I have filled PathFigure and not filled Ellipse having them both in one Path parent?
<Path Stroke="#FFF633FF"
StrokeThickness="1"
Fill="#FFF633FF">
<Path.Data>
<GeometryGroup>
<EllipseGeometry Center="6,0"
RadiusX="4"
RadiusY="4">
</EllipseGeometry>
<PathGeometry >
<PathGeometry.Figures>
<PathFigure StartPoint="6,-15"
IsClosed="True">
<LineSegment Point="1,-25" />
<LineSegment Point="11,-25" />
</PathFigure>
</PathGeometry.Figures>
</PathGeometry>
</GeometryGroup>
</Path.Data>
</Path>

A simple trick would be to replace the EllipseGeometry by a non-filled PathGeometry with two ArcSegments:
<PathGeometry >
<PathGeometry.Figures>
<PathFigure StartPoint="2,0" IsFilled="False">
<ArcSegment Point="10,0" Size="4,4" />
<ArcSegment Point="2,0" Size="4,4" />
</PathFigure>
</PathGeometry.Figures>
</PathGeometry>

The whole point of a geometry is to describe a shape. Stroke and fill are always taken from the owning Path since the Path is responsible for drawing the shape. So what you're asking is not possible. You need to use two Paths here.

WPF Callout Anchor start position

I have implement Callout control of Blend. Problem which I am facing is anchor point of the Callout starts with some margin from the top, While I want to have anchor from the top left of the callout.
Any help will be appreciated.
What I have now:
What I would like to have:

You seem to be mistaken about using this control. From MSDN, the Callout.AnchorPoint property Gets or sets the position of the callout relative to the top and left corner. It is used for positioning the control and does not alter the shape of the Callout.
UPDATE >>>
Dude!!! That's a really simple shape... just draw your own one with a Path... then you can make it any shape you want:
<Path Stroke="Black" StrokeThickness="1" Fill="#CCCCFF">
<Path.Data>
<CombinedGeometry GeometryCombineMode="Union">
<CombinedGeometry.Geometry1>
<RectangleGeometry RadiusX="20" RadiusY="20" Rect="0,0,300,200">
<RectangleGeometry.Transform>
<TranslateTransform X="30" />
</RectangleGeometry.Transform>
</RectangleGeometry>
</CombinedGeometry.Geometry1>
<CombinedGeometry.Geometry2>
<PathGeometry>
<PathFigure StartPoint="0,30">
<LineSegment Point="50,10" />
<LineSegment Point="50,50" />
</PathFigure>
</PathGeometry>
</CombinedGeometry.Geometry2>
</CombinedGeometry>
</Path.Data>
<Path.Effect>
<DropShadowEffect Color="Black" Opacity="0.4" Direction="-135"
ShadowDepth="10" />
</Path.Effect>
</Path>

Drawing an arrow end on a Quadratic Bezier Segment using xaml

What's the easiest way to draw an arrow at the end of a QuadraticBezierSegment? The tricky part is to get the correct rotation to mach the incoming line segment.
Any ideas on how to go about this? Should I extend PathSegment?
I've got this for drawing a simple bezier line.
<Path Stroke="Black" StrokeThickness="1">
<Path.Data>
<PathGeometry>
<PathGeometry.Figures>
<PathFigureCollection>
<PathFigure StartPoint="100,430">
<PathFigure.Segments>
<PathSegmentCollection>
<QuadraticBezierSegment Point1="150,250" Point2="250,300" />
</PathSegmentCollection>
</PathFigure.Segments>
</PathFigure>
</PathFigureCollection>
</PathGeometry.Figures>
</PathGeometry>
</Path.Data>
</Path>

You could define the geometry for the arrow head....but it would take trial and error to correctly orientate it on the end of the bezier curve.
Instead you could use this control and define the endcap you wanted using geometry and it properly places it on the end of the "line".
http://blogs.msdn.com/b/mrochon/archive/2011/01/10/custom-line-caps-in-wpf.aspx
<loc:CappedLine Stroke="Red" StrokeThickness="1" Canvas.Left="40" Canvas.Top="200" RenderTransformOrigin="0.5,0.5" Height="107" Width="195">
<loc:CappedLine.EndCap>
<GeometryGroup>
<LineGeometry StartPoint="0,0" EndPoint="10,10"/>
<LineGeometry StartPoint="0,0" EndPoint="10,-10"/>
</GeometryGroup>
</loc:CappedLine.EndCap>
<loc:CappedLine.LinePath>
<PathGeometry Figures="M0,0 C1,1 10.5,75.5 48.5,66.5 86.5,57.5 5,3.5000146 105.5,16.500091 157.5,29.500166 164.5,87.500505 164.5,87.500505" />
</loc:CappedLine.LinePath>
</loc:CappedLine>
<loc:CappedLine Stroke="Red" StrokeThickness="1" Canvas.Left="180" Canvas.Top="200" RenderTransformOrigin="0.5,0.5" Height="107" Width="195">
<loc:CappedLine.EndCap>
<GeometryGroup>
<LineGeometry StartPoint="0,0" EndPoint="10,10"/>
<LineGeometry StartPoint="0,0" EndPoint="10,-10"/>
</GeometryGroup>
</loc:CappedLine.EndCap>
<loc:CappedLine.LinePath>
<PathGeometry Figures="M0,0 C1,1 10.5,75.5 48.5,66.5 86.5,57.5 5,3.5000146 105.5,16.500091" />
</loc:CappedLine.LinePath>
</loc:CappedLine>

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