Databases
StackOverflow2013
Postsdbo
POSilverlight - Passing mouse coords from UI View to ViewModel
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POSilverlight - Passing mouse coords from UI View to ViewModel
    primarykey
    data
    text
    <p>I'm using Silverlight with MVVM (using Caliburn.Micro). I've created a simple rectangle in the View as follows:</p> <pre><code>&lt;Rectangle x:Name="Rectangle2" cal:Message.Attach="[Event MouseMove] = [Action MouseMoved($eventArgs)]" Fill="#FFE2F5FF" HorizontalAlignment="Left" Height="220" Margin="195,43,0,0" Stroke="Black" VerticalAlignment="Top" Width="195" /&gt; </code></pre> <p>In the ViewModel I have:</p> <pre><code>public void MouseMoved(MouseEventArgs mouseEventArgs) { var point = mouseEventArgs.GetPosition(null); String str = string.Format("({0}\t{1})",point.X,point.Y); MVVMCoords = str; } </code></pre> <p>The coords that appear are absolute because I put null in GetPosition. How can I make them relative to the rectangle? (So the top left corner of the rectangle is 0,0) As far as I understand, this can be done with out the ViewModel knowing the UIElements in the View.</p> <p>Thanks, Guy</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USGuy Wald
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. CONormally I'd suggest just passing in `Rectangle2` into the `GetPosition` call (`var point = mouseEventArgs.GetPosition(Rectangle2);`) but you're saying you don't have a reference to that object? EDIT: Doesn't the mouse move event pass in a sender? Are you throwing that out when you attach the event? If so, keep the sender and pass that into the `GetPosition` call.
      singulars
      1. POSilverlight - Passing mouse coords from UI View to ViewModel
      1. USChris Sinclair
    2. COI can have a reference, but if i'm not mistaken, the rule is that the ViewModel doesn't know about the elements in the UI and vice versa. I'm trying to find a way to make the coords relative to the UIElement with out passing the UIElement. But now that I think about it, It is not that I am referring to a certain element on the UI, i'm casting to a general UIElement. What do you think?
      singulars
      1. POSilverlight - Passing mouse coords from UI View to ViewModel
      1. USGuy Wald
    3. COAs far as I'm concerned, tracking the mouse position is part of the view anyway. The view would communicate the _relevant_ position down to the view model (if truly necessary). I don't think your "view" _must_ only exist as part of the XAML. Maybe it's _possible_ to do it, but I don't think it's worth bending over backwards for. I don't think it's a violation that when you receive a UI event, that you receive its _sender_ (in fact, that's _standard_). Have the View handle determining the relative coordinates, then send that value to your ViewModel.
      singulars
      1. POSilverlight - Passing mouse coords from UI View to ViewModel
      1. USChris Sinclair
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload