How to detect if a Surface Contact is over a ScatterView?

Posted by Bart Roozendaal on Stack Overflow See other posts from Stack Overflow or by Bart Roozendaal
Published on 2009-04-05T16:17:29Z Indexed on 2010/03/08 13:06 UTC
Read the original article Hit count: 725

Filed under:

surface

|

visualtreehelper

|

microsoft-surface

This is a (kind of) similar situation as in the SDK Sample Shopping Cart for MS Surface.

I have an application with two ScatterViews. The first covers the complete Surface window ('surface'). The second resides in a TagVisualization object ('pod'). There might be more than one pod available (if more than one tag is down on the table).

I would like to be able to drag a ScatterViewItem from the 'pod' to the 'surface' or another 'pod'. I have no problems in detecting if a ScatterViewItem is leaving its ScatterView parent. Also, no problems in reparenting the ScatterViewItem.

However, I want to detect which ScatterView the item is being dragged on. In the SDK Sample they have used a visual element (an ellipse in this case) which is below the ScatterViews. VisualTreeHelper.HitTest is used to determine if the contact is over the ellipse. If so, the 'connected' ScatterView is found.

I don't think this is a very elegant solution. I wouldn't want a visual element put in there, just to detect if a contact is over a ScatterView.

Are there betterwways to accomplish this kind of 'hittesting'?

Thanks, Bart

© Stack Overflow or respective owner

Related posts about surface

Surface of Revolution with 3D surface

as seen on Game Development - Search for 'Game Development'
I have to use this function to get a Surface of Revolution (homework). newVertex = (oldVertex.y, someFunc1(oldVertex.x, oldVertex.y), someFunc2(oldVertex.x, oldVertex.y)); As far as I know (FIXME) Surface of Revolution means rotations of a (2D)curve around an axis in 3D. But this vertex computing… >>> More
ScatterViewItems Containing Surface Interactive Elements

as seen on Stack Overflow - Search for 'Stack Overflow'
This is an age old problem of interactive elements inside interactive elements, but I want a ScatterViewItem to contain other surface interactive elements such as a SurfaceButton or SurfaceCheckBox. I've got all my elements in there and they react to taps etc. The problem is that I only get the… >>> More
Conversion from Iphone Core Surface RGB Frame into ffmepg AVFarme

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I am trying to convert Core Surface RGB frame buffer(Iphone) to ffmpeg Avfarme to encode into a movie file. But I am not getting the correct video output (video showing colors dazzling not the correct picture) I guess there is something wrong with converting from core surface frame buffer… >>> More
Surface development: it’s just like software development

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
Surface is magic. Everyone using it seems to think that way. And I have to be honest, after working for almost 2 years with the platform I still get that special feeling the moment I turn on the unit to do some more work. The whole user experience, the rich environment of the SDK, the touch, even… >>> More
Pygame surfaces and their Rects

as seen on Game Development - Search for 'Game Development'
I am trying to understand how pygame surfaces work. I am confused about Rect position of Surface object. If I try blit surface on screen at some position then Surface is drawn at right position, but Rect of the surface is still at position (0, 0)... I tried write my own surface class with new rect… >>> More

Related posts about visualtreehelper

ListBoxItem.Parent returns nothing, unable to get it thru VisualTreeHelper.GetParent either

as seen on Stack Overflow - Search for 'Stack Overflow'
How do I extract the parent container of a ListBoxItem? In the following example I can go till the ListBoxItem, higher than that I get Nothing: <ListBox Name="lbAddress"> <ListBox.ItemTemplate> <DataTemplate> <Button Click="Button_Click"/> </DataTemplate> … >>> More
How to detect if a Surface Contact is over a ScatterView?

as seen on Stack Overflow - Search for 'Stack Overflow'
This is a (kind of) similar situation as in the SDK Sample Shopping Cart for MS Surface. I have an application with two ScatterViews. The first covers the complete Surface window ('surface'). The second resides in a TagVisualization object ('pod'). There might be more than one pod available (if more… >>> More
Finding the TextBlock that is part of the default control template ComboBox generated through code.

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to find the TextBlock that is inside the control template of a comboBox. using VisualTreeHelpar.GetChildrenCount is working only if the comboBox is declared in XAML.In that case GetChildrenCount returns 1 and a recursive search is possible. However, if I declare the combo as a member… >>> More
Mouse interaction in ListBoxItem children (WPF)

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a ListBox with an ItemTemplate that contains a control that interacts with the mouse. This interfers with the selection functionality of the ListBox, i.e. clicking a control does not select the item. This is because ListBoxItem sets the Handled property of the mouse event to true in OnMouseLeftButtonDown… >>> More
WPF Accessing Items inside Listbox which has a UserControl as ItemTemplate

as seen on Stack Overflow - Search for 'Stack Overflow'
I have Window that has a ListBox ListBox(MyListBox) has a DataTable for its DataContext ListBox's ItemSource is : {Binding} Listbox has a UserControl(MyUserControl) as DataTemplate UserControl has RadioButtons and TextBoxes (At first They're filled with values from DataTable and then user can change… >>> More