Solution because other scenarios will likely break the model.ĭefinitely come up with a custom TreeView class (and TVI class) that providesĬonfigurable properties to help the user establish the correct navigationĮxperience. If you have a simple sample that illustrates what youĪre doing, I can take a look, but again, I would hesitate to propose a generic You may find that you need to override behavior of (and your own TreeView that uses your custom TVI as its item container).Īttached event handlers only get called after class handlers, so there's only If you really do want to move focus, then youĪre probably getting to the point where I'd recommend deriving your own TVI And although you might want thisīehavior in one app, you might not want it in another app (where you might have If you need to support this, then you'd have to handle tunneled keyĮvents and move focus programmatically. TVI, the user may still expect the up and down arrow keys to move them between I'm not sure you can solve it with aįor example, if you have a TextBox in your Programmatically is always a hard thing because you have to think about all the Than one child control, this provides an odd user experience. Your scenario, you would have to decide if you really want the TVI, itself, toīe so strongly associated with a single control in the TVI. Mouse click handler, but that won't get called in this scenario because TVI hasĪ class handler that marks the bubbled mousedown event as handled.) State and to support toggling via the mouse. The CheckBox just becomes a way to visualize the checked Yes, this approach is really a way to turn the TVI, itself, Any solution will likely require that because you'll never want theĪdditional navigation stop for the CheckBox.Ĭode if you'd like. You will still need to set Focusable to false on theĬheckBox. (Although, it doesn't include the ButtonBase events or properties. Supports the IsThreeState property and raises all the expected toggle buttonĮvents (Checked, Unchecked, and Indeterminate) on the target element. Press or mouse click will update the attached IsChecked property. Presses) and responds to those events just like a toggle button. The class monitors the TreeViewItem for input events (mouse clicks or key IsVirtualToggleButton property is attached to the TreeViewItem and set to true, Order to add support for yada yada yada.) Wordy description about leveraging an attached property to extend a class in Guess the en vogue term for this type of thing is "attachedīehavior". This doesn't work either, because focus never leaves the first CheckBox.Īnyone ever figured this out before? If so, what's the trick? This seems like it should be a simple XAML-only solution, but I can't figure it out! :( I also tried writing some code that handles GotFocus and GotKeyboardFocus of all TreeViewItems and then use FindName to get at the CheckBox and give it focus. I tried setting Focusable on the ItemContainerStyle to false, but then the keyboard navigation does not work properly. I find that the TreeViewItems want to take focus first, requiring me to press an arrow key twice to bring focus to the contained CheckBox. I want it so that the user can easily navigate through the tree and press Spacebar to check/uncheck an item's CheckBox. Suppose I have a TreeView where items should all contain CheckBoxs. I just can't find a way to do this, even after trying several hacks. I have a WPF programming question for you all.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |