tags:

views:

158

answers:

1
Q: 

WPF position and dimensions wrong

Hey

I'm currently using a semi-transparent WPF form with no border as a camera style device in a program of mine. However, when I access the position (top, left) and dimension (height, width) properties of the form, it would appear they are wrong.

The top property reported to be roughly 26 pixels higher than it actually is in relation to the desktop. IE if I put the forms top and left at (0,0) the properties will report (0, -26).

The height is also incorrect, reporting about 50-60 pixels shorter than it actually is.

Has anybody experienced this problem in the past and have a solution?

Regards, Andy Hunt

A: 

Hi,

if I understand correctly, this is no problem at all but the expected behavior. WPF uses DPI-independent virtual units for measuring size and position, not actual pixels.

There are many sources like this explaining this.

If I understood the question wrong (its late and I am tired ;) could you provide a code sample illustrating the issue?

Andrej

Andrej  2009-07-05 23:23:56
Ah, well it would appear my problem is with converting the position reported by the WPF form in to the pixel co-ordinates in relation to the desktop then. Do you know of any solution for this?
 2009-07-06 11:21:31
You can convert WPF Units to pixels and vice versa quite easy, have a look at this:http://stackoverflow.com/questions/611427/wpf-canvas-height-in-pixels
Andrej  2009-07-18 16:28:45
Thanks a lot! That worked just fine :)
 2009-07-18 20:05:17

related questions

Displaying Flash content in a C# WinForms application
How to get the value of built, encoded ViewState?
Unhandled Exception Handler in .NET 1.1
How do I connect to a database and loop over a recordset in C#?
How do I most elegantly express left join with aggregate SQL as LINQ query
Get a new object instance from a Type in C#
.NET Testing Framework Advice
Automatically update version number
What is the difference between an int and an Integer in Java/C#?
How to write to Web.Config in Medium Trust ?
WinForms ComboBox data binding gotcha
How do you sort a C# dictionary by value?
Adding Scripting functionality to .NET applications
Floating Point Number parsing: Is there a Catch All algorithm?
How do I print an HTML document from a web service?
Decoding T-SQL CAST in C#/VB.net
Anatomy of a "Memory Leak"
How do I get a distinct, ordered list of names from a DataTable using Linq
Reliable Timer in a Console Application
How do I fill a DataSet or a DataTable from a LINQ query resultset ?
What's the difference between Math.Floor() and Math.Truncate() in .NET?
How do I calculate relative time?
How do I calculate someone's age in C#?
Are there any conversion tools for porting Visual J# code to C#?
When setting a form's opacity should I use a decimal or double?