I have multiple buttons that are using a single command with a command parameter to act on their "down" event among all types of interactions (click, keypress, touch). Turns out this isn't enough for my application, and I must also know when the button is released. How do I do something similar for these buttons "up" event?
Look at the OnIsPressedChanged() method. You may have to derive a class from Button to be able to handle it.
Also, you may handle the MouseLeftButtonUp event, but it will fire only if the button is pressed by a mouse click. If you want to catch keyboard, you will have to process KeyUp events and determine if the the button was clicked as a result of that key (Space, Enter in some cases, a shortcut key, etc.)
Unfortuntely there's no special command for the UP-event.
But you can use EventToCommand behavior
I've found a combination of events are required to listen to:
PointerReleased, PointerCanceled, PointerCaptureLost should all be listened to in a touch environment for "up" events.
Related
Im working on an app to control some stuff over bluetooth.
Currently I have a form with some buttons. On each button I want to trigger an event when the button is pressed down and fire a different event when the button is released.
Is this possible?
Not sure what the "bluetooth" info should tell me.
But in C# Winforms, yes that is possible. See the MouseDown and MouseUp Events: http://msdn.microsoft.com/en-us/library/system.windows.forms.button_events.aspx
(You may need to combine them with the keyboard events to capture them as well)
I have few buttons in my windows application which has mnemonics.Now if i press multiple keys the events of the button clicks gets fired as i have used mnemonics.
But the behaviour is not as expected,because second button event handler is getting executed before the first button event handler has finished its execution,and also i have written my code in such a way that in the event handler of first button i am disabling my second button,still the second button event handler is getting executed.The problem here is due to mnemonics.PLease suggest me a better way to handle mnemonics as soon as possible.
Thanks in advance.
If your logic is tied to your buttons, change that. Let your buttons merely manipulations an object that implements your logic. You can then check in this object whether the requested action is allowed (i.e. whether the previous operation has finished.
Alternatively you can just disable buttons when running and re-enable then when.finished.
So I'm making a simple program where I need to know if a button is pressed, and I need to know when a button is released after it's been released. I need to be able to complete an action when it's released
Winforms/WPF: MouseUp
WebForms: onkeyup
It's not really clear if you're working with webforms or winforms, but .NET provides event handlers for pretty much any event that could happen.
Here's a listing of the events Buttons handle.
The one you're looking for is 'Click'. This method will be fired whenever the user clicks on the button.
If you need to do something when the user pushes down on the mouse and again when he releases, Button isn't right for you. Many other objects implement the 'OnMouseDown' and 'OnMouseUp' events, though.
If you're talking about a winform and a keyboard press use the KeyUp event ( http://msdn.microsoft.com/en-us/library/system.windows.forms.control.keyup.aspx ) If you're talking about a mouse click use MouseUp ( http://msdn.microsoft.com/en-us/library/system.windows.forms.control.mouseup(v=vs.71).aspx ).
I'm having a problem with release a captured mouse. My application demand that I make a sequence of actions (means that they will run automatically one after another). The sequences are:
_ Select an object
_ Enter a value on a message box for the object to rotate according to the entered value.
At run time: I click on the object, it activate the MouseLeftButtonDown event of the selected object. Then the message box appears. This message box blocks my mouse to activate MouseLeftButtonUp event of that object. So I have to click the object one more time to activate the MouseLeftButtonUp event or my application cannot continue running.
Can anyone helps me with this?
That's why a lot of controls only take action on the MouseUp event. They use the MouseDown event to do something like indicating state or selection. And use mouse capture (Capture property in Winforms) to ensure that they'll get the MouseUp event even if the mouse is moved outside of the window. Try it in your browser right now, press and hold the right mouse button, nothing happens, let it go. Exact same behavior when you left-click a link or button.
Sounds like that's what you want to do as well.
So how to begin.
I am asking when you make a game for example and you add a controlls how do I make the form's key events run when the focus isnt on the form but on some of the controlls and when i call this.Focus() or this.Select() it doesnt't happen anything, but if I use a empty form(with no controls) it works(the events respond).And when i have for example 2 buttons and call button1.focus() and press a key the button1's event handler responds (only it) adn then when i call button2.Focus() it responds for button2.How is focus distributed througt the controlls?
I know for muttons you have to click them once to put the focus on them automaticly and for textboxtes too,but when i click the form it doesnt move the focus on the form.
Im have almost no experience with Key events please explayn me how to use them and how they function understandly.
PS: sorry for the long questin
You can set the Form.KeyPreview to true to have the form react to key events.