Porting a WPF App to Mac ... - WPF Discussion Boards

Member 253938127-Mar-08 22:34

27-Mar-08 22:34

Hi all,

i try to create a style for a menu/menuitems (changing background, fonts and so forth...). Everything works well except the background of the separators. Has anyone an idea where to specify that the background is not the windows default gray but the brush i define?

thanks Rainer

Re: WPF - Separator Style

User 27100928-Mar-08 2:56

User 271009

28-Mar-08 2:56

Take a look at the separator control template. I left the default control tempate in place without modifying it.

You'll notice that although the Separartor has various public properties exposed, the template does not consume them. This is why your attempts to change it didn't work.

So you can take this simple XAML and play around witht control template to get the look you desire.

<Window
	xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
	x:Class="Window1"
	x:Name="Window"
	Title="Window1"
	Width="640" Height="480">
	<Window.Resources>
		<Style x:Key="SeparatorStyle1" TargetType="{x:Type Separator}">
			<Setter Property="Template">
				<Setter.Value>
					<ControlTemplate TargetType="{x:Type Separator}">
						<Grid Margin="0,6,0,4" SnapsToDevicePixels="true">
							<Rectangle Margin="30,0,1,1" Height="1" Fill="#E0E0E0"/>
							<Rectangle Margin="30,1,1,0" Height="1" Fill="White"/>
						</Grid>
					</ControlTemplate>
				</Setter.Value>
			</Setter>
		</Style>
	</Window.Resources>

	<Grid x:Name="LayoutRoot">
		<Menu HorizontalAlignment="Left" VerticalAlignment="Top" Width="Auto" Height="Auto">
			<MenuItem Header="File">
				<MenuItem Header="New"/>
				<Separator Style="{StaticResource SeparatorStyle1}"/>
				<MenuItem Header="Exit"/>
			</MenuItem>
		</Menu>
	</Grid>
</Window>

Cheers, Karl

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modified 27-Feb-21 21:01pm.

Performance Issue in WPF

devneeraj27-Mar-08 19:58

devneeraj

27-Mar-08 19:58

I have WPF application that performs scrolling of three xaml controls in circular manner.

If I use simple control without much styles or instead use a simple image in the element, then scrolling goes fine and application performance is good.

However, if I load the control with heavy WPF styles,then at very high resolution say (1400 * 900) systems, scrolling gets jerky and CPU usage increases.The problem exists with machines with low graphic card.

I studied this and found that WPF can take advantage of hardware rendering pipeline but couldn't find any working example.

Is there some way in WPF by which we can use heavy styled xaml controls with good performance on PCs with UMA graphic card?

Re: Performance Issue in WPF

Pete O'Hanlon27-Mar-08 22:54

Pete O'Hanlon

27-Mar-08 22:54

Why do you think you are going to get an answer to the one I gave below? Didn't you believe me? Did you somehow think that I was pulling this information out of my a*se just to yank your chain?

You've been told the solution. Now actually get off your a*se and do something about it. Mad | :mad:

Deja View - the feeling that you've seen this post before.

My blog | My articles

Re: Performance Issue in WPF

Jammer27-Mar-08 23:57

Jammer

27-Mar-08 23:57

Pete's right ...

WPF unlike winforms uses the graphics engine of the machine to 'paint' screens. This is all done throuh the MILCORE and DirectX ...

"The major components of WPF are illustrated in the figure below. The red sections of the diagram (PresentationFramework, PresentationCore, and milcore) are the major code portions of WPF. Of these, only one is an unmanaged component – milcore. Milcore is written in unmanaged code in order to enable tight integration with DirectX. All display in WPF is done through the DirectX engine, allowing for efficient hardware and software rendering. WPF also required fine control over memory and execution. The composition engine in milcore is extremely performance sensitive, and required giving up many advantages of the CLR to gain performance."

Get a better machine ...

To be fair WPF is arguably very 'Vista' related meaning that you should really say to users that minimum specs of machine are more ot less what you would expect in order to run Vista.

That is certainly what we are going to be doing when we roll out our new software ...

Jammer

Going where everyone here has gone before! Smile | :)

My Blog

Re: Performance Issue in WPF

devneeraj31-Mar-08 20:18

devneeraj

31-Mar-08 20:18

Thanks for the reply.

I have already lowered the Bitmap effect and applied the caching still in need more performance, can you suggest something ?

Can i somehow further reduce the rendering quality while doing doing some particular task?

Thanks

Re: Performance Issue in WPF

Jammer2-Apr-08 8:24

Jammer

2-Apr-08 8:24

Since WFP is practically DirectX it might be worth investigating down this route ...

Maybe experiment with you images as well. I can't imagine a scenario where I would want to degrade quality though so i've never looked into this.

Jammer

Going where everyone here has gone before! Smile | :)

My Blog

Porting a WPF App to Mac ...

Jammer27-Mar-08 10:08

Jammer

27-Mar-08 10:08

Hi All,

This is a way off yet but its something I have to think about.

My current project has a large enough potential Mac user base to make a mac version a viable effort. Have any of you here undertaken such a task? I'm not even sure what languages you can use to program for a Mac. I know that its a Unix based system which is significantly different platform and would require a stack of effort to learn but it would be worth it.

I need to have a read up but has anyone got any useful info on this topic?

Cheers,

Jammer

Going where everyone here has gone before! Smile | :)