I am new in Silverlight. I need to fill a rectangle partially with a SolidColorBrush (like a Bar, I need the border). With GradientBrush, the change of color is not sharp.
I can add two rectangles for this, but there has to be a better way.
Any suggestion would be appreciated.
I am using Silverlight 4.0.
Thanks for reading.
-Rakib
What about using gradient brush with gradient stops very close to each other, something like this:
<LinearGradientBrush x:Key="_backgroundBrush" StartPoint="0.5,0" EndPoint="0.5,1">
<GradientStop Color="Yellow" Offset="0" />
<GradientStop Color="Yellow" Offset="0.65" />
<GradientStop Color="Blue" Offset="0.66" />
<GradientStop Color="Blue" Offset="1" />
</LinearGradientBrush>
Related
I am trying to create an array of gradient brushes in xaml but I would like to point each array element back to a static resource that is the gradient brush. So, far I've been unable to achieve this. Can someone provide guidance on how I might accomplish this?
I want to add them to an x:Array but point to the resource rather than having to re-define the brushes as I've had to do here. I use the brushes in several places in addition to an array of them so I only want to define the brushes once.
<LinearGradientBrush x:Key="OrangeLinearGradientBrush" StartPoint="0.5,0" EndPoint="0.5,1">
<GradientStop Offset="0" Color="#FFF7941D" />
<GradientStop Offset="1" Color="#FFF26522" />
</LinearGradientBrush>
<LinearGradientBrush x:Key="RedLinearGradientBrush" StartPoint="0.5,0" EndPoint="0.5,1">
<GradientStop Offset="0" Color="#F26263" />
<GradientStop Offset="1" Color="#B80303" />
</LinearGradientBrush>
<x:Array x:Key="BrushArray" Type="LinearGradientBrush">
<LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
<GradientStop Offset="0" Color="#FFF7941D" />
<GradientStop Offset="1" Color="#FFF26522" />
</LinearGradientBrush>
<LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
<GradientStop Offset="0" Color="#F26263" />
<GradientStop Offset="1" Color="#B80303" />
</LinearGradientBrush>
</x:Array>
You may use StaticResourceExtensions:
<x:Array x:Key="BrushArray" Type="LinearGradientBrush">
<StaticResourceExtension ResourceKey="OrangeLinearGradientBrush"/>
<StaticResourceExtension ResourceKey="RedLinearGradientBrush"/>
</x:Array>
I have a LinearGradientBrush defined for use in plotting a texture in a MeshGeometry3D, as follows. The idea is that values at the absolute ends of the brush should be plotted in Silver:
<LinearGradientBrush x:Key="GrayOmitOutOfRangeIncreasing" StartPoint="0,0.5"
EndPoint="1,0.5" >
<GradientStop Color="Silver" Offset="0.00" />
<GradientStop Color="#000064" Offset="0.00000000000000014" />
<GradientStop Color="#000091" Offset="0.043" />
<GradientStop Color="#0000BE" Offset="0.087" />
<GradientStop Color="#3C00B2" Offset="0.130" />
<GradientStop Color="#7800A5" Offset="0.173" />
... and other gradient stops...
<GradientStop Color="#FCE800" Offset="0.913" />
<GradientStop Color="#FCF200" Offset="0.957" />
<GradientStop Color="#FCFC00" Offset="0.99999" />
<GradientStop Color="Silver" Offset="0.99999979" />
<GradientStop Color="Silver" Offset="1" />
</LinearGradientBrush>
Instead, the values, which are transformed to a range between 0 and 1 before being plotted, are taking on a shading of the neighboring color, as in the picture below:
How can I get the image I want?
Look at how they're defined:
<GradientStop Color="#FCFC00" Offset="0.99999" />
<GradientStop Color="Silver" Offset="0.99999979" />
<GradientStop Color="Silver" Offset="1" />
This means that ... what, 0.001% of the mesh will be a gradient from FCFC00 to silver. That's not going to be detectable. Move the penultimate silver gradient stop to maybe 0.98 or something, and see if that gets you closer.
How can I create a WPF control (similar to a TextBlock) so that any overflowing text is faded out to transparent rather than simply clipping or wrapping?
I need to keep my control fixed-width, so expanding the width of the control to fit the text is not an option. I also do not want to make the text font smaller.
Not quite sure exactly what you are trying to achieve, but you could do something like this:
<TextBlock Text="Some long text here that should fade out">
<TextBlock.Foreground>
<LinearGradientBrush>
<GradientStop Offset="0" Color="Black"/>
<GradientStop Offset="0.7" Color="Black"/>
<GradientStop Offset="1" Color="Transparent"/>
</LinearGradientBrush>
</TextBlock.Foreground>
</TextBlock>
But your control still needs to be wide enough to accommodate all the text for it to display.
<TextBlock Text="fgdfgfdgfddgfdgdfgfdgfdgd" Width="129" TextWrapping="NoWrap">
<TextBlock.Foreground>
<LinearGradientBrush EndPoint="0.661,0.399" StartPoint="0.008,0.496">
<GradientStop Color="Black" Offset="0"/>
<GradientStop Color="#7F000000" Offset="0.803"/>
<GradientStop Color="#4C0A0909" Offset="0.95"/>
<GradientStop Color="#BF000000" Offset="0.729"/>
<GradientStop Color="#F8000000" Offset="0.699"/>
</LinearGradientBrush>
</TextBlock.Foreground>
</TextBlock>
The trick on the gradient is that even though all colors are all based off black, The fade is achieved through opacity of each gradient by playing with A part of RGBA, in pseudo-code:
GradientStop Color="Black" A=100%
GradientStop Color="Black" A=97% Offset="0.803"
GradientStop Color="Black" A=75% Offset="0.95"
GradientStop Color="Black" A=80% Offset="0.729"
GradientStop Color="Black" A=30% Offset="0.699"
Thanks guys, but I found the answer I needed on MSDN.
I want to apply some gradient to my image how can I achieve that?
Thanx
You could host your image within a Border, applying the gradient to the border background:
<Border>
<Border.Background>
<LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="Red" Offset="0" />
<GradientStop Color="Blue" Offset="1" />
</LinearGradientBrush>
</StackPanel.Background>
<Image Source=..your image source .." />
</Border>
This assumes that your image has some opaque regions which will show the gradient beneath it.
In the gradient you can use one or more colours. Any it is very easy to set the gradient using either VS2010 or expression blend. The following is the sample code of a two-colour gradient with blue and white.
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<LinearGradientBrush.RelativeTransform> <CompositeTransform CenterY="0.5" CenterX="0.5" Rotation="-90"/>
</LinearGradientBrush.RelativeTransform>
<GradientStop Color="#FFB6D3F9"/>
<GradientStop Color="#FFFDFDFD" Offset="1"/>
</LinearGradientBrush>
I'm trying to use one LinearGradientBrush in the Definition of another LinearGradientBrush. But I've no idea weather this would even work, and if it works, I need to know how.
For Example:
<LinearGradientBrush x:Key="ComboBoxFocusBackgroundBrush" EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFFDEEB3" Offset="0"/>
<GradientStop Color="#FFFBF2CD" Offset="1"/>
<GradientStop Color="#FFFCE48A" Offset="0.5"/>
<GradientStop Color="#FFFBE388" Offset="0.75"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="FilterPopupTitleBrush" EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#B45988" Offset="0.75"/>
//Code here to use ComboBoxFocusBackgroundBrush
<GradientStop Color="#990088" Offset="0.75"/>
</LinearGradientBrush>
thanking you in anticipation for your answers
Edit:
To get things a bit more clear in the example I want to use "ComboBoxFocusBackgroundBrush" in the "FilterPopupTitleBrush" as a "template".So that I've the same color gradient in both brushes without a copy of the "<GradientStop...>"-tags
You can share the list of gradient stops between multiple brushes, like this:-
<GradientStopCollection x:Key="MyGradient">
<GradientStop Color="#FFFDEEB3" Offset="0"/>
<GradientStop Color="#FFFBF2CD" Offset="1"/>
<GradientStop Color="#FFFCE48A" Offset="0.5"/>
<GradientStop Color="#FFFBE388" Offset="0.75"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="ComboBoxFocusBackgroundBrush" EndPoint="0.5,1" StartPoint="0.5,0"
GradientStops="StaticResource MyGradient}" />
<LinearGradientBrush x:Key="FilterPopupTitleBrush" EndPoint="0.5,1" StartPoint="0.5,0"
GradientStops="{StaticResource MyGradient}" />
Now you can vary the EndPoint, StartPoint and other properties create different variants of the same basic gradient.
You can even supply the same set to RadialGradientBrush.
Sharing another way of doing this, you don't need to create a separate collection, you can also reuse the existing brush like
<LinearGradientBrush x:Key="FilterPopupTitleBrush" GradientStops="{Binding GradientStops, Source={StaticResource ComboBoxFocusBackgroundBrush}}"/>
This way of creating a custom brush based on existing brush will be helpful specially when you want to extend predefined themes like Telerik themes, where it would not be good approach to change the XAML from telerik.