I want to display data from and XML document in a tree-like display but I don't need items to be selectable and I don't want them to be collapsible.
Any way to do this with TreeView? Is TreeView even the right control to use?
Thanks!
You can handle the PreviewMouseDown and cancel the event. If you need to allow scrolling, you can do a HitTest and see if it is over the "ScrollerChrome". If you need more details, I can provide code.
Related
I need to build a custom items control in WPF, where the user can drag/drop the items. Normally I would just maintain a list of view models and use a data template to define how the items should be displayed (in this case, a button). But I am concerned that this will make the drag/drop difficult as the ItemsSource objects will be view model objects , not the actual button.
My other potential approach is when an object is added to the ItemsSource, create a button in c# and add it manually, that way I can access the button directly to do drag/drop.
What would your advice be?
I have solved my issue. I found a way to get the control being render from the data template
I am currently working on a WPF project in C# using MVVM. In this project I have a list box that loads a user control for each row of data in my items source.
The user control that gets added for each item in my collection also contains a list box that is filled from a database. This second list box often grows and therefore makes each item larger than the view of the first listbox.
My question is, how to I make my listbox have smooth scrolling. Right now it jumps from the top of one item the the top of the next. Since each item is bigger than the view of the listbox I need to be able to scroll without jumping from the top of each item to the next.
I have used a scrollview to achieve this but the list box then intercepts the mouse wheel event and will not allow me to scroll without hovering over the scroll bar.
Is there a better way to do this?
UPDATE:
I can get smooth scrolling using the scrollview control but I cannot scroll while my mouse is inside the scrollview. I have to have my mouse over the scrollbar in order to scroll.
It is like something is intercepting my mousewheel event.
I was able to achieve what I was trying to do by using a ItemsControl rather than the ListBox. It loaded just like the ListBox control and pulled all of my data into it and let the ScrollView handle the scrolling. It did not intercept the mousewheel even like the listbox did.
If you do not need to be able to select an item, I highly recommend using the ItemsControl.
You can set on the Listbox the following Property ScrollViewer.CanContentScroll="False".
I have a listbox that might contain thousands of items. I need a way to select a subset of those with only one control redraw. Right now I'm using the SetSelected method and it forces the control to redraw itself after it selects one item.
Can I use reflection to edit the selecteditems list? Or can I set the control to not redraw itself somehow, select the items, and the turn on redrawing again?
Anyone have any other ideas?
-Isaac
Use the ListBox.BeginUpdate() / ListBox.EndUpdate brackets for this purpose.
I want to create my own expandable/collapsable tree-like UserControl, which nodes are the Border elements with any content. And this control should have the single SelectedItem. When I select one of the nodes I want to see details information about selected item.
I've done the control's presentation and a piece of logic:
I can see all the tree of elements, collaps any node(s), select one of them and see details. But I can't do bidirectional binding. I.e. I want to have an opportunity to change fields in details panel and immidiately see changes in the tree-control.
Help me please either call force update (rebind data) of the control (just give a tip how to perform this) or give an advise how to create my own List-like UserControl.
I tried to make my control inherit from some ListBox class but I couldn't.
PS. Sorry for my bad English...
Use the TreeView control.
I've got a list of things that I want the user to easily edit the order of. Right now I'm binding them to a ListBox with a custom ItemTemplate. Within that template I have an UP & DOWN button. My goal was to move the item up/down based on the button clicked.
However I'm having trouble associating the button's click event with the actual item in the list. I've seen some folks setup a drag/drop for ordering items but that that would be too complex for this app (it's target user base =1, just me).
I assume this is possible with a ListBox. Maybe someone has a beter idea on how to implement this? It's not a huge set of data... less than 25 items.
The DataContext of the button (of the entire template, thus inherited by the button) is the item itself. Simply cast it to your desired type.