I have a ListView in the middle of my page in my WPF application. The problem is when the mouse cursor or my finger is above that ListView then I can't scroll down on that page (the ListView has auto size, no vertical scrolling is needed for it). How can I fix this?
Here's what I tried so far:
setting the Focusable property
setting the ScrollViewer.VerticalScrollBarVisibility to all possible values
changing the size of the ListView from auto to a fixed size
Actually, what happens(and why what you tried didnt work), was that the inner ScrollViewer inside the ListView recieved the MouseScroll events.
It handled them and the set for the RoutedEventArgs Handled="True", meaning the Page's ScrollViewer didnt get the scrolling events.
Bubbling scroll events from a ListView to its parent
You could take the above and implement it as a Behavior on your ListView.
Related
As per requirement need in C# WPF application , We want to load Data on scrollViewer while moving Horizontal scroll bar.
As we have tried by scrollViewer_ScrollChanged event. But It fired automatically every time while loading of scrollViewer.
In our case we have one grid control inside scrollViewer.
Please help me, looking for positive reply.
I have a listview of just one column in my winform. My requirement is.....when item/data inside listview exceeds listview capacity(width)....need to display horizantal scroll bar automatically. I've set my listview's View property to Details. Im not even able to scroll using keyboard key's
I've tried the following
listview1.scrollable = true;
listview1.view=view.details;
Thanks in advance
I'Ve replaced ListView with RichtextBox. Richtextbox is embedded with horizantal scrollbar when data exceeds width of control.
To attain column header(similar to as in Listview header), i've used an button control shaped/dragged it like header to Richtextbox's width and set its view to 3D which exactly carved as Listview.
Note: ListView control is not provided with horizantal scrollbar but has vertical Scrollbar. My solution serves only if controls holds
only 1 column and is subjected for Display purpose. Worked like charm
I have the situation that my C# WPF application contains a ListView whose elements are Expanders. Each of those expanders contains a ListView with ListViewItems. Here is a picture:
On the right you can see a Scrollbar. And that ScrollBar is my problem. It has got two issues:
The ScrollBar does not work when using the MouseWheel over the expanded list. By that I mean the area from "Controller" down to "FullInstallation". If hovering over the header ("All Tests"), the ScrollBar does scroll. I think that the ListView inside the Expander by default has a ScrollBar which "steals" the MouseWheel event. However, I don't know what to do against it.
The ScrollBar scrolls over the Expander items and not the content of the expanders. By that I mean, that it is not possible to scroll a little bit down, instead you always scroll at least 1 Expander item down. I would like the scrollbar to scroll such that it is possible to see for instance one half of the "All Tests" Expander.
The picture shows a disabled scrollbar, but by making the window smaller, the scrollbar gets enabled.
What I have tried so far:
ScrollViewer outside the outer ListView: This solves Problem 1, however it means that the MouseWheel does not work at all! That is because the outer ListView generates its own ScrollViewer (used Snoop to find this out) which "steals" the MouseWheel events.
Redirected all the MouseWheel events of all the controls (ListView, Expander, ListViewItem) to the ScrollViewer: Again I used a ScrollViewer outside of the outer ListView and this time I used the MouseWheel event for all my controls to call the MouseWheel event of the outer ScrollViewer. This did work, however for some locations of the mouse pointer it didn't. For instance between two ListViewItems there is a small 1 millimeter space where the MouseWheel event is not catched. Or at the bottom after the last Expander ("Short Tests"). There I do not get any event.
I tried a couple more things but did not get any further.
Does anyone have an idea how to solve this?
Best wishes,
Christian
1) For how to write an attached behavior to control mousewheel behavior when you have nested itemscontrols, see: WPF Nested ScrollViewer / ListBox Scrolling
2) Non virtualized itemscontrol supports smooth scrolling, see: Is it possible to implement smooth scroll in a WPF listview?
I was kind of expecting my ScrollViewer's child controls to hand the MouseWheel events back up the the ScrollViewer automatically, and that's not the case.
I have a ScrollViewer with a ListBox in it. If I manually resize the width of the ListBox to be less than the ScrollViewer, the MouseWheel works on all of the ScrollViewer but has no effect when the mouse is positioned above the ListBox.
What's the standard way to do this? Do I put an event trigger on the ListBox that fires the event on the parent? Do I handle and reroute the event in the code behind?
The ListBox's template has a ScrollViewer in it, so that ScrollViewer will be handling the events and stopping them from propagating up the visual tree.
What exactly are you trying to achieve by having a ListBox inside a ScrollViewer? Perhaps you need to re-template the ListBox, but it's impossible to say without further info.
I have a WPF ListView which currently scrolls everytime I click on an item which is only partially visible. How can I keep the control from scrolling that item into view (instead simply selecting the partially visible one)? This behavior is very annoying when doing a drag from this control.
Thanks.
Added: I am looking for a solution to keep the control itself from scrolling when contents are clicked that the control believes are not fully visible. Often this is by a few pixels and the scroll is not necessary.
The items scroll into view because the default behavior on list item click is to call BringIntoView(). You can add an event handler for the RequestBringIntoView event and catch it before it bubbles up from the ListViewItems to the ScrollViewer. In your handler, check the bounds of the sender against the visible region and if you decide that you don't need to scroll, set the event's Handled flag to true.
Since I'm currently on the road, I cannot try this, but have you tried playing around with CanContentScroll, and/or wrapping the scrollable content into a Panel, as suggested by the ScrollViewer Overview on MSDN?
In the worst case, you might want to replace the ListView's ItemsPanel by a hacked ScrollViewer with a "fuzz" factor, e.g. by capturing the RequestBringIntoView event.
have you tried this approach?
just as an addon, I don't know how much you know about the subject, but here is a good place to read more about it.
added:
I just found that you can prevent the mouse wheel of scrolling as well.