BitmapImage Constructor Overloads - WPF Discussion Boards

Re: Capture mouse event on slider track

15-Jun-09 0:19

So, I have a custom slider.   The body of the slider is all buttons, and these are at the top of the Z order.   However, my tracker hangs below the slider, so it has a main tracking area, which is not on top of these buttons, in the sense of z, it's below them, in the sense of y.

This is my template:

                                                <Track.Thumb>
                                                      <Thumb >
                                                            <Thumb.Template>
                                                                  <ControlTemplate>
                                                                        <Grid Margin="0,0,0,0">
                                                                              <Grid.RowDefinitions>
                                                                                    <RowDefinition Height="*" />
                                                                              </Grid.RowDefinitions>
                                                                              <Image Grid.Row="0" Width="30" Margin="-8,0,-8,-25">

Where-ever in this tree I place an event for mouse up, it fires only for the right button, not the left.   How do I catch the left button ? What I am doing is, I have a slider which moves smoothly, but when the user stops scrolling, I want to animate to one of a number of fixed positions.   I am also animating a slide up when the user clicks one of the buttons ( this part works fine ).

Christian Graus

Driven to the arms of OSX by Vista.

"! i don't exactly like or do programming and it only gives me a headache." - spotted in VB forums.

I can do things with my brain that I can't even google. I can flex the front part of my brain instantly anytime I want. It can be exhausting and it even causes me vision problems for some reason. - CaptainSeeSharp

modified on Monday, June 15, 2009 6:28 AM

Pete O'Hanlon15-Jun-09 0:21

15-Jun-09 0:21

Christian Graus wrote:
This is my template:

<Image Grid.Row="0" Width="30" Margin="-8,0,-8,-25">

And it's invisible, I see.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

Re: Capture mouse event on slider track

Christian Graus15-Jun-09 0:30

Re: Capture mouse event on slider track

15-Jun-09 0:30

Just spotted it. I hate when people do that....

Pete O'Hanlon15-Jun-09 1:33

15-Jun-09 1:33

Have you tried handling the PreviewMouseButtonUp event instead?

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

BitmapImage Constructor Overloads

#realJSOP15-Jun-09 0:11

#realJSOP

15-Jun-09 0:11

I'm observing some pretty bizarre behavior here. When I do this, it's okay:

BitmapImage img = new BitmapImage(new Uri(System.IO.Path.Combine(this.ImagePath, this.Images[0]), UriKind.Absolute));

However, when I change it to one of these two, the available constructor overloads CHANGE and the one I was using is no longer acceptable by the compiler:

// this doesn't work
string nextFileName = System.IO.Path.Combine(ImagePath, Images[index]);
BitmapImage img = new BitmapImage(new Uri(nextFileName), UriKind.Absolute);

// this doesn't work either
Uri imageUri = new Uri(System.IO.Path.Combine(ImagePath, Images[index]);
BitmapImage img = new BitmapImage(imageUri, UriKind.Absolute);

Why is this?

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Christian Graus15-Jun-09 0:16

15-Jun-09 0:16

If you replace index with 0, does it work ? Because I see that as an obvious difference in your code ? What if you make sure index is zero ?

Pete O'Hanlon15-Jun-09 0:19

15-Jun-09 0:19

The problem's with the way he declares the Uri.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

Christian Graus15-Jun-09 0:45

15-Jun-09 0:45

Ah - of course. It's late, and I'm going cross eyed. I looked for an obvious difference, although I didn't see how that would just not work, instead of giving an error.

Pete O'Hanlon15-Jun-09 0:16

15-Jun-09 0:16

It's different because you assign the Uri in your first version with UriKind.Absolute as one of the parameters. In other words, it's a parameter of the Uri, not the BitmapImage. Here's an example of the second version:

string nextFileName = System.IO.Path.Combine(ImagePath, Images[index]);
BitmapImage img = new BitmapImage(new Uri(nextFileName, UriKind.Absolute));

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

Silverlight 3, WPF will be thrown away then??

#realJSOP15-Jun-09 1:04

#realJSOP

15-Jun-09 1:04

GAk! You're right! Blush | :O

(my face is red)

Seraph_summer15-Jun-09 0:03

Seraph_summer

15-Jun-09 0:03

I read the following from one news:http://infoworld.com/print/79216

Silverlight 3 applications can run in or out of the browser, online or offline.

If so, WPF will be thrown away? It seems not, but if Silverlight 3 can be run in or out of the browser,
why WPF will be chosen?

thanks

Cross post. Please ignore.

Pete O'Hanlon15-Jun-09 0:13

15-Jun-09 0:13

Already answered in the C# forum.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

WPF Image List viewer problem

ruellm14-Jun-09 23:58

ruellm

14-Jun-09 23:58

hi,

Im having trouble figuring out on how to implement my Image List viewer with the following specs;

- The image viewer loads more than 1000 files but must take less memory. It is given that each files is atleast 1mb each.

Therefore loading 1000 image alone already takes 1GB of memory.

My current implementaion simply loads all images to a Listbox binded to a List of images, and this list box is inside a scrollviewer (vertical scroll). This implementation obvoiusly is using more memory since it loads all images.

My plan is to load image only if visible in the scrollviewer, if not visible then image is dereference or not loaded at all.

DO you have any idea on how to implement this type of requirement?
Thanks in advance,

Re: WPF Image List viewer problem

Pete O'Hanlon15-Jun-09 1:19

15-Jun-09 1:19

If I were you, I'd look at using a virtualised ListBox then.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

about Silverlight 3!!

Seraph_summer14-Jun-09 23:48

Seraph_summer

14-Jun-09 23:48

I read the following from one news:http://infoworld.com/print/79216

Silverlight 3 applications can run in or out of the browser, online or offline.

If so, WPF will be throwed away? It seems not, but if Silverlight 3 can be run in or out of the browser,
why WPF will be chosen?

thanks

Cross post.

Pete O'Hanlon15-Jun-09 0:20

15-Jun-09 0:20

Please don't do this. Pick one place to post and stick with it.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

Re: about Silverlight 3!!

Re: Cross post.

Seraph_summer15-Jun-09 0:25

Seraph_summer

15-Jun-09 0:25

sorry, I do this mainly because such question will be interested by
all of these forums and moreover I really want to be clarified in considering
I want to learn Silverlight and/or WPF.

thanks agian for your comments.

Michael Sync23-Jul-09 20:25

Michael Sync

23-Jul-09 20:25

Both Silverlight inbrowser or out-of-browser Application run on the sandbox. So, you can't access a lot of things (e.g. system tray, registry, user file system except Isolated Storage. ) You can't re-use old .NET class library that you wrote long time ago.

But with WPF, you can do a lot of things.

Please read the differences between Silverlight and WPF here[^]

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

Microsoft MVP (Silverlight), WPF/Silverlight Insiders

Animation timelines

Christian Graus14-Jun-09 23:20

14-Jun-09 23:20

I've just discovered you can do this, which is cool:

slider.BeginAnimation(Slider.ValueProperty,
new DoubleAnimation(slider.Value, newValue, animationDuration, FillBehavior.Stop));

Just like Core Animation, I had no idea that was possible. The question is, when I do this, is there any way to make the animation more in a non linear way, so it starts slow and gets faster, or vice versa ?

Amusingly, I just found a class called AnimationTimeline. But, it doesn't seem to take To and From properties, and generally doesn't respond well to googling, so, still need help....

Re: Animation timelines

Pete O'Hanlon14-Jun-09 23:56

14-Jun-09 23:56

John - I've started to use Bling[^] to work with animations. You might find this useful. Alternatively, Blend allows you to specify easings by manipulating the keyframe spline.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

Re: Animation timelines

Christian Graus15-Jun-09 0:14

15-Jun-09 0:14

JOHN ???? :P

Re: Animation timelines

Pete O'Hanlon15-Jun-09 0:18

15-Jun-09 0:18

Sorry mate. I was reading his post below, and then replied to yours. From now on, I declare that all posters are to be referred to as John.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.