I have canvas with listbox inside it.
each child element of listbox sets eventhandler for Click event.
On canvas I set eventhandlers for
ManipulationStarted="canvas_ManipulationStarted"
ManipulationDelta="canvas_ManipulationDelta"
ManipulationCompleted="canvas_ManipulationCompleted"
My code for swiping works perfect accept one thing, it fires Click eventhandler before ManipulationCompleted eventhandler.
But for example listbox in the same time scrolls perfectly and do not fire Click event.
So basically what I need is to handle manipulation events in same way listbox do.
If this condition is true:
private void canvas_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
e.DeltaManipulation.Translation.X > [some value]
....
}
I need to disable firing Click event on any child element of canvas, doesn't matter if it is inside listbox or not.
Why are you setting click handlers if you don't want them to fire?
Click fires on pointer pressed, so there's no way to tell if the user wanted to Click or to start a manipulation. You'll need to either decide based on the location clicked or a later event if you want to differentiate between "clicks" and swipes.
Instead of Click you can handle the Tap gesture along with the manipulation events. Since Tap fires on the pointer released the manipulation system will fire it if the user tap and releases in one spot and it will trigger the manipulations if the user presses and moves the pointer.
See How to handle manipulation events for Windows Phone 8 for more details.
Related
I want to be able to hold down a button (i.e. MouseLeftButtonDown) and have it's event repeat fire.
I code Mouse.Capture(button) in the MouseLeftButtonDown event and Mouse.Capture(null) in MouseLeftButtonUp event.
If I hold the mouse button down, the MouseLeftButtonDown only fires once. I can see this not by setting a breakpoint but by using Console.Writeline().
I had this very code working at some point. Then I refactored and put the mouse events in an Interface. Everything still works except this repeat action now!
Update - More information:
Here is the before call which was in a specific class:
Mouse.Capture(sender as MenuGelButton)
MenuGelButton is a xaml creation of ellipses and text to make a cool button.
Since adding the interface (which is common code for several xaml creations all of which inherit the interface), here is the current call from within the interface:
Mouse.Capture(sender as UIElement)
Update of Update:
A mouse click event is not designed to auto repeat fire. A keyboard event is. I had this working (and it continues to work) on a keyboard event not the mouse event. Sorry for the confusion...
I believe you are looking for Microsoft's RepeatButton. You can use it in XAML just like you would use a Button, and it fires a click event multiple times.
From their documentation:
A RepeatButton is a button that raises Click events repeatedly from the time it is pressed until it is released. Set the Delay property to specify the time that the RepeatButton waits after it is pressed before it starts repeating the click action. Set the Interval property to specify the time between repetitions of the click action. Times for both properties are specified in milliseconds.
Try doing something like this:
mouse button --> fires event
in the event, set a timer of your liking (how many times per second would you like the action to happen?)
in a loop, every time timer fires, check to see if mouse button is still "down". If yes, fire. If not, don't fire.
you'll probably want to add another event of mouse button up, that will stop the timer, so it won't fire anymore (or bind to a bool that will let you know if you want to fire ... up to you ..)
Hope it helps.
I have a Grid and inside the grid, I have Buttons. I need PointerEntered and PointerReleased events as I need to track which buttons are hovered. The problem is that, I need my Grid to handle the click events. Even though I don't have a click/tap/press handler for the button, my button captures the click and doesn't bubble it up to its parent (Grid). If I disable the button by settin IsEnabled to false, the click event is bubbled up to the Grid correctly, but then PointerEntered and PointerReleased events aren't fired, which I need to handle on the button. How can I handle enter/release events on the button and at the same time, pass the click event to its parent? I need my Grid to go onto "clicked" state as I also listen for the PointerReleased event on it. If click doesn't fire, released doesn't fire even if I do release the mouse button when on the Grid.
Thanks,
Can.
Try using AddHandler to attach a click event to grid and see if it works for you.
http://msdn.microsoft.com/en-us/library/windows/apps/windows.ui.xaml.uielement.addhandler.aspx
Remember to remove the event using RemoveHandler when done.
I'm trying to put together a drag & drop solution in WPF TreeView control, using these techniques:
Dragging and dropping to a TreeView, finding the index where to insert the dropped item
When the user clicks on a TreeViewItem, first the treeViewItem_MouseLeftButtonDown gets executed, then the treeViewItem_Drop also. At every single click.
It sounds like you're calling DragDrop.DoDragDrop() from the treeViewItem_MouseLeftButton handler. The treeViewItem_Drop even is raised when the mouse button is released, so you're getting a drop event on every mouse click. Try calling DoDragDrop from a treeViewItem_MouseMove handler instead. Just make sure that the left mouse button is pressed before calling DroDragDrop. You may also want to make sure the mouse has moved a minimum distance before starting the DragDrop operation as well, such as
if(e.LeftButton == MouseButtonState.Pressed
&& horizontal_move > SystemParameters.MinimumHorizontalDragDistance)
{
DragDrop.DoDragDrop();
}
I was wonder how can I fire an event when the user double click on my webbrowser component. Since it has no such event how it could be possible...
Thanks in advance
Sounds like a WPF matter :-)
There you would go with an Behaviour attached to the browser. See this link for more information about this approach if you can alter your application (dependends on what you have done yet).
If you can't apply this solution, just bind a event handler to the click event and count click per time with respect to the mouse movement since the last click and if both conditions are true (two clicks in 0.2 secs, mouse hasn't moved more than 2px, for example) execute your double click code. The events you should use are previewMOUSEdown or MOUSEdown, not KEYdown.
// Call this where you want to create the event (let's say on the form load for example).
webBrowser1.DoubleClick += new EventHandler(webBrowser1_DoubleClick);
// This happens when the event is fired (so when you double click on the webbrowser control).
void webBrowser1_DoubleClick(object sender, EventArgs e)
{
// Code
}
Try this.
I don't know why you can't set this event via the designer :(, but this should work.
I'm making a calendar From in C# using WinForms.
I've put it together using a two-dimensional array of Panels, and inside them I have a List<> of custom controls which represent appointments.
The user needs to be able to drag appointment controls from one Panel to another (from day to day).
The custom control has a MouseDown and MouseUp event, which passes a message up from the control to the Parent.Parent (custom control -> day panel -> calendar form) and calls public methods StartDragging() and StopDragging() respectively.
Inside these methods, I make a clone of the custom control and add it to the Form, and store it in a global variable in the form which is called DraggedControl.
The Form has an event handler for MouseMove which goes like this:
void Calendar_MouseMove(object sender, MouseEventArgs e)
{
if (DraggedControl == null)
return;
DraggedControl.Location = PointToClient(MousePosition);
Refresh();
}
There are two problems, however:
First of all, the custom control is under everything else. I can see it being added and removed on MouseDown and MouseUp, but it is being added at 0,0 under the panels and day Labels.
Secondly, it does not appear to be moving with the MouseMove at all. I have a feeling this might be because I am moving the mouse with the button pressed, and this would represent a drag action rather than a basic MouseMove.
If I remove the MouseUp code, the control does drag with the mouse, however as soon as the mouse enters the panels (which the control is, sadly, underneath), the drag action stops.
What would you suggest I do?
I suspect there is probably a better way to do what I am trying to do.
custom control is under everything
else
bring it on top:
DraggedControl.BringToFront();
it does not appear to be moving with
the MouseMove at all
Control, which handled MouseDown event, captures mouse input and receives all following MouseMove events until it releases mouse input on MouseUp event, that's why Calendar_MouseMove() is not called. Handle MouseMove event for the same control, which generated MouseDown event.