WPF Discussion Boards

11-Jun-09 2:41

It would. Think about it for a second - when you deploy your application, the help folders are presumably going to exist somewhere under the directory where your executable resides. Hence, you have to replicate this in your application structure. WPF isn't magic, it can't know that you intend to deploy it differently; so copy your subfolder below the bin directory and mimic the live environment.

"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.

Drag and Drop outside main window in WPF

ruellm11-Jun-09 0:52

ruellm

11-Jun-09 0:52

How can i drag an item (list item) from its list and drop it outside the window and still handle the event?

Example: If i have a list controls which contains a list of filenames, then i drag 1 list item outside the main window and drop it, a message box is displayed which displays the filename.

I am planning to develop similar application which performs additional processes when an item is draged(and droped) outside the main window.

Please help.

Re: Drag and Drop outside main window in WPF

Member 47043954-Jan-10 9:21

Member 4704395

4-Jan-10 9:21

yeah, I'm wondering that myself....I'm using an Adorner while DD-ing a listviewitem. Works great inside the app window....but I want to drop it on the desktop and perform some custom tasks there. No luck for now.

How to check Stack panel items

Nekkantidivya11-Jun-09 0:38

Nekkantidivya

11-Jun-09 0:38

Hi,

I am working on WPF stack panel. In this I used to add items dynamically to the stack panel. Now If I click on the stackpanel item some message like the number of the child clicked should be displayed. Will there be any events for thi to checking the selected item of the stack panel.

If any one have any idea how to do this please reply me.

Thanks in advance

Re: How to check Stack panel items

ABitSmart11-Jun-09 3:37

ABitSmart

11-Jun-09 3:37

This might be somewhat complex.

Have a custom Routed event for the Canvas items.
Let the Canvas subscribe to this event.
The Canvas item fire's the routed event whenever it is selected.
When fired, the Canvas event handler gets invoked
In the handler, RoutedEventArgs parameter's OrignalSource property should give you the actual Canvas item that invoked the event.

Formatting XAML for CP Article

Jammer11-Jun-09 0:03

Jammer

11-Jun-09 0:03

Hi All,

I'm having a nightmare getting some XAML snippets adequately formatted for a new CP article. Anyone got any tips / working methods / tools that make this process easier?

Cheers,

Jammer
My Blog | Article(s)

Pete O'Hanlon11-Jun-09 2:10

11-Jun-09 2:10

I use Scrubber in MoXAML PowerToys[^] and the appropriate source language in the article template to accomplish this.

"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.

Jammer11-Jun-09 9:51

Jammer

11-Jun-09 9:51

Nice ...

Jammer
My Blog | Article(s)

Pete O'Hanlon11-Jun-09 11:21

11-Jun-09 11:21

I like it. The next version of MoXAML has something called Babelcode - it converts from VB.NET to C#, and vice versa.

"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.

Jammer11-Jun-09 12:39

Jammer

11-Jun-09 12:39

Now that will be a wicked addition to the tool set. I really must get VS Standard or Pro for me at home. I so miss MoXAML at home with C# Express.

Jammer
My Blog | Article(s)

Multiple UserControls

zauberfisch10-Jun-09 22:56

zauberfisch

10-Jun-09 22:56

Hi,

i have a UserControl (CustomToolbar) with buttons like new, delete, ...
Also i have a UserControl (Customer) with Textboxes, Labels, ...

My UserControl (Customer) looks like this:

<UserControl x:Class="test.ucCustomer"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:mekoOffice">
<local:bDockPanel>
<local:ucCustomToolbar x:Name="tbCustomer" DockPanel.Dock="Top" />
<local:ucStatusbar x:Name="stMain" DockPanel.Dock="Bottom" />
<Grid x:Name="grdMain">

If i click on the button new in my toolbar the new-method in UserControl (Customer) should be fired. In another scenario if i click on the button new in my toolbar the new-method in UserControl (Article) should be fired. How can i accomplish that.

thx,
zauberfisch

Christian Graus10-Jun-09 23:08

10-Jun-09 23:08

You need to have the button call a method which works out which of your two methods to call, and branches from there. OR you can reset the event handler every time, but the first way makes more sense

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

zauberfisch10-Jun-09 23:18

zauberfisch

10-Jun-09 23:18

That Toolbar should be kind of generic. It should be used in all kind of different UserControls. Do you have an example?

thx,
zauberfisch

Pete O'Hanlon10-Jun-09 23:27

10-Jun-09 23:27

You could do this quite easily with a RoutedEvent. Alternatively, you could look into MVVM, and take a look at integrating the Mediator pattern with this here.

"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.

zauberfisch11-Jun-09 0:39

zauberfisch

11-Jun-09 0:39

Can you give me an example with a RoutedEvent, i get crazy because i don't understand how it works.

#realJSOP10-Jun-09 23:31

#realJSOP

10-Jun-09 23:31

Pass the control with the buttons in it into the other controls, and subscribe to its button click events. This violates basic OOP principles, but if that's what needs to be done to process events, then so be it.

"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

Gideon Engelberth11-Jun-09 3:27

Gideon Engelberth

11-Jun-09 3:27

This sounds like a good scenario for Commands. You can make your button trigger the pre-defined New command like so:

<pre><Button Command="New">Click Me</Button></pre>

Then you can wire up a command binding anywhere up the visual chain from the toolbar to handle the New command. That handler will need to be able to determine which control method to call (which is basically CG's first suggestion).

Sound animation

Member 343091110-Jun-09 12:43

Member 3430911

10-Jun-09 12:43

Hi, I need make any animation of sound for my WPF aplication. I don't know how to get any data for my animation. Maybe intensity from left and right canal? I don't know how to get this data. Can anybody help me? Thanks

Re: Sound animation

Christian Graus10-Jun-09 14:49

How do you save a lossless rotation of a JPEG file under WPF?

10-Jun-09 14:49

Yes, balance and volume are about the only things you could animate.

fjparisIII10-Jun-09 4:26

fjparisIII

10-Jun-09 4:26

I searched articles on this site, this forum, and MSDN and could not find an answer, even though the actual code is probably very simple. How do I perform a lossless 90 degree rotation to a JPEG file using strictly WPF API's? I've seen code for using GDI+ only. I can't believe I have to step out of WPF to do this. I also need to preserve metadata.

I'm already accomplishing this with lossy compression but to minimize artifacts I have to set quality at maximum and this is doubling the size of my images.

Re: How do you save a lossless rotation of a JPEG file under WPF?

Christian Graus10-Jun-09 8:50

Re: How do you save a lossless rotation of a JPEG file under WPF?

10-Jun-09 8:50

There is no such thing as lossless JPEG compression, unless you use a JPEG format which .NET does not support. Therefore, you need a third party library to support lossless JPEG, JPEG 2000, etc. If you're starting with a JPEG, then your image is lossy to start with, and a 90 degree rotation should not cause a great amount of additional loss.

fjparisIII10-Jun-09 9:19

fjparisIII

10-Jun-09 9:19

Christian Graus wrote:
There is no such thing as lossless JPEG compression

You're absolutely right about that, but what I was asking about is how to rotate a JPEG or HD Photo image without doing another round of compression. If a JPEG file is rotated in 90 degree increments, theoretically it is possible to rotate it losslessly, and all self-respecting software does this.

I thought this was fairly well known information. In a previous application of mine that used GDI+ instead of WPF, you could rotate and save an image 100 times without the slightest image degradation. There's just got to be a way of doing this with WPF as well.

Conceptually what you have to do is separate the image data from the metadata and do a block by block transformation of the image data without going through the compression algorithm. But I just don't know the right calls to make in WPF to do all this heavy lifting for me. I don't think there's any way to do this if you start with the TransformBitmap and RotateTransform classes.

Re: How do you save a lossless rotation of a JPEG file under WPF?

Christian Graus10-Jun-09 9:24