I have a WPF window .I want when my mouse cursor is outside the Control area of window and I am clicking on it I want my window to disappear is there any mechanism of achieving it thorough WPF??
Take a look at the Mouse.Capture method. This lets you get mouse events even if the mouse is outside your control.
Be sure to release the mouse once you're done though calling Capture with null.
To release mouse capture, call Capture passing null as the element to capture.
In the constructor place this:
public MyControl()
{
//Other stuff like initialize component
Mouse.Capture(this);
MouseLeftButtonDown += OnMouseLeftButtonDown;
}
Then implement that method:
private void OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if(!this.IsMouseOver)
{
Close(); //your closing implementation here
Mouse.Capture(null);
}
}
Related
I have an application that can moved by dragging the title bar with the typical pattern using DragMove:
private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
DragMove();
}
It works fine, but only if I click in a spot, and then drag. If I click while dragging my mouse over the title bar it doesn't move.
Is there another event than MouseLeftButtonDown I need to hook to?
Try calling MyWindow.CaptureMouse() in the MouseLeftButtonDown event handler and then calling MyWindow.ReleaseMouseCapture() in the MouseLeftButtonUp event handler.
I creating a custonmized box class (inherits from ComboBox). I don't want the text box to react to right mouse clicks. I can get rid of the context menu by setting this to null in ApplyTemplate, but right mouse clicks move the cursor. I tried hooking up PreviewMouseRightButtonDown in ApplyTemplate and setting Handled to True, but the event still gets through which is strange as it seems to work for the left click.
The cursor actually moves when the mouse button is released, so you want mark the MouseRightButtonUp event as handled. You could override OnMouseRightButtonUp:
protected override void OnMouseRightButtonUp(MouseButtonEventArgs e)
{
base.OnMouseRightButtonUp(e);
e.Handled = true;
}
Or you could attach a class handler to the MouseRightButtonUp event to mark it as handled:
static MyComboBox()
{
EventManager.RegisterClassHandler(
typeof(MyComboBox),
MouseRightButtonUpEvent,
new MouseButtonEventHandler(MyComboBox_MouseRightButtonUp));
}
private static void MyComboBox_MouseRightButtonUp(
object sender, MouseButtonEventArgs e)
{
e.Handled = true;
}
That will also prevent the context menu from being created without you having to set it to null explicitly.
I'm building a Windows Presentation Foundation control with Microsoft Blend.
When I leave my control by pressing the left-mouse-button, the MouseLeave-Event is not raised. Why not?
This is intended behaviour: When you are doing mousedown on a control and leaving the control, the control STILL retains its "capture" on the mouse, meaning the control won't fire the MouseLeave-Event. The Mouse-Leave Event instead will be fired, once the Mousebutton is released outside of the control.
To avoid this, you can simple tell your control NOT to capture the mouse at all:
private void ControlMouseDown(System.Object sender, System.Windows.Forms.MouseEventArgs e)
{
Control control = (Control) sender;
control.Capture = false; //release capture.
}
Now the MouseLeave Event will be fired even when moving out while a button is pressed.
If you need the Capture INSIDE the Control, you need to put in more effort:
Start tracking the mouseposition manually, when the mousekey is pressed
Compare the position with the Top, Left and Size Attributes of the control in question.
Decide whether you need to stop the control capturing your mouse or not.
public partial class Form1 : Form
{
private Point point;
private Boolean myCapture = false;
public Form1()
{
InitializeComponent();
}
private void button1_MouseDown(object sender, MouseEventArgs e)
{
myCapture = true;
}
private void button1_MouseMove(object sender, MouseEventArgs e)
{
if (myCapture)
{
point = Cursor.Position;
if (!(point.X > button1.Left && point.X < button1.Left + button1.Size.Width && point.Y > button1.Top && point.Y < button1.Top + button1.Size.Height))
{
button1.Capture = false; //this will release the capture and trigger the MouseLeave event immediately.
myCapture = false;
}
}
}
private void button1_MouseLeave(object sender, EventArgs e)
{
MessageBox.Show("Mouse leaving");
}
}
of course you need to stop the own tracking ( myCapture=false;) on MouseUp. Forgot that one :)
When I don't get mouse events I expect I typically use Snoop to help me understand what is happening.
Here are a couple of links:
1- Snoop (a WPF utility)
2- CodePlex project for Snoop
And for completeness and historical reasons (not the bounty - it doesn't make sense having two duplicate questions - you should probably move it into one if not too late)...
I made a thorough solution using global mouse hook here (approach 2)
WPF: mouse leave event doesn't trigger with mouse down
And simplified its use - you can use it by binding to commands in your view-model - e.g.
my:Hooks.EnterCommand="{Binding EnterCommand}"
my:Hooks.LeaveCommand="{Binding LeaveCommand}"
my:Hooks.MouseMoveCommand="{Binding MoveCommand}"
...more details in there
Old question but I came across the same problem with a Button (MouseLeave does not fire while MouseDown because MouseDown Captures the Mouse...)
This is how I solved it anyway:
element.GotMouseCapture += element_MouseCaptured;
static void element_MouseCaptured(object sender, MouseEventArgs e)
{
FrameworkElement element = (FrameworkElement)sender;
element.ReleaseMouseCapture();
}
Hope that helps someone looking for a quick fix :P
I created a very simple test control that has a Rectangle on a canvas (within other containers, but inconsequential). The Rectangle has event handlers for mouse down, mouse move, and mouse up. If I capture the mouse in the Rectangle's MouseLeftButtonDown event, I do not receive a corresponding MouseLeftButtonUp event.
Some code:
private void rect1_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (_captured = CaptureMouse())
{
_offset = new Point(Canvas.GetLeft(rect1), Canvas.GetTop(rect1));
_origin = e.GetPosition(RootCanvas);
e.Handled = true;
}
}
private void rect1_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (_captured)
{
ReleaseMouseCapture();
_captured = false;
e.Handled = true;
}
}
I attached event handlers for the container elements as well, just to make sure one of them wasn't getting the mouse-up event somehow, but none of them were. Is there an expectation of this in Silverlight that I haven't yet learned?
I think you are little confused about what is actually capturing the mouse events.
Consider when you do this:-
if (_captured = CaptureMouse())
what object is the CaptureMouse actually being called against?
Answer: The user control for which your code is the code-behind. Had you wanted the rectangle to capture the mouse you would do:-
if (_captured = rect1.CaptureMouse())
CaptureMouse(); from mouseDown Event and then try.
I am trying to create a custom scrollbar and am using images as button.
For now a simple
I can handle the MouseLeftButtonDown and Up event just fine but what I'd like to do is while its held down, every so many millisecond trigger an event is fired.
I tried something like this but it isn't quite working. Suggestions?
public delegate void Changed(RangeScrollButtonControl sender, int value);
public event Changed OnChanged;
private System.Threading.Timer Timer;
private void Image_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
this.Timer = new System.Threading.Timer(Timer_Callback, null, 0, 100);
}
private void Image_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
this.Timer = null;
}
private void Timer_Callback(object sender)
{
if (this.OnChanged != null)
{
this.OnChanged(this, 1);
}
}
The piece of functionality you're looking for is a RepeatButton, this will fire it's Click event repeatedly while the mouse button is held down. You can configure the delay and the interval of the events.
You could then style this button to use the image at Silverlight Show
Hope this helps.
Which piece "isn't quite working" ?
Also, could you restyle or retemplate Silverlght's scrollbar similar to what is seen in this blog post to get what you need?
I would use a Storyboard as a timer. Something like:
Then you can do a MouseSTB.Begin. Once the Storyboard is finished you can catch it in the MouseSTB.Completeed Event. In that event you can do what ever you need to do and then just start it over again. It can easilly be controled by setting some flags on the mouseover, mouseenter and mouseleave events. I use these timers in a lot of place and they work just fine and they do not peg the processor.