I have a c# .net 2.0 winForm with a textbox and a trackbar. The textbox Validating event sets e.cancel if the user clicks the trackbar and the validation fails. I am then left with the cursor in the textbox, but the mouse focus is still on the trackbar so moving the mouse moves the trackbar.
I have tried SetFocus in the validating event (bad according to MSDN but I tried anyway) but the mouse stays on the trackbar.
How do I detach the mouse focus from the trackbar?
Are you displaying the validation error message in a message box. If that is the case the mouse release of trackbar wouldnt have fired as the message box would have taken control and that's the reason you are seeing the trackbar moving after you exit the message box.
MessageBox and validating event dont go well with each other. Best way to do it is to use a ErrorProvider.
Related
I have a TextBox and a button: button_InputComplete. When I finished inputting the data in the TextBox I press the button and the button_Click event handler is invoked.
While the button_Click event handler is executing there remains a cursor in the TextBox at the end of the input data (a vertical blinking line).
I would like to hide this cursor. I do not mean the mouse pointer but the cursor in the TextBox (the vertical blinking line). I also need to be able to restore it.
The Cursor.Hide() statement hides the mouse pointer.
I tried to move the focus away from the TextBox with the statement: this.Select(); but the cursor remained in the TextBox.
I also tried the statement: control.Select(); where control is an instance of another control located on the form (not the TextBox), but neither this worked (the cursor remained in the TextBox).
Any help with an idea would be greatly appreciated.
Thank you in advance.
I have a Window with two Image elements: Back and Front. Obviously, Front has higher Z-index then Back. I also have TouchMove handler on Back. But the event is not triggering when Back is overlapped with Front in the touch point. So, how do I make touch to ignore Front?
If you want touch or click events to fall through to an underlying control, set IsHitTestVisible to false on the Front Image.
Here's more information on how hit testing works on UIElements.
I'm trying to write to a status bar the current mouse position and in order to that I took over OnMouseMove() event handler which is triggered when the mouse cursor enters my control. The problem is that in my control I have a WPF control which is has Dock.Fill Dockstyle, meaning, it fills the entire parent control.
When I run the applicaiton I see that nothing happens and the mouse position isn't updated, so I've noticed that the OnMouseMove() event of the WPF control is triggered and not the OnMouseMove() event of my control, which contains the relevant code for updating the mouse location coordinates.
I wanted to know if there's a way (other than implementing the code in the WPF OnMouseMove() event handler, of course) to bypass the WPF control event handler and use always my control's event handler.
I hope I was clear enough in my question, if not please let me know and I'll try to elaborate.
Thanks!
try the PreviewMouseMove-Version of OnMouseMove - this one should fire correct
and you need to have some kind of background (not null) or your controll won't see the mouse - so give it a transparent color or something)
I've created a form that's maximized over the entire screen.
Within that form, and sized to fill the entire form, I've placed a panel with background color set to Red. The form's TransparencyKey is set to Red.
Therefore, the Panel is like a "keyhole" - you can see the desktop that's directly underneath it.
When the user clicks on the panel, OR, presses a key on the keyboard, I want to take action.
But, because the panel is completely transparent, when it is clicked or a key is pressed, nothing happens. If I make the panel non-transparent (setting it's background color to Blue, for example), it does respond to clicks.
What's the best way to get the panel to respond to clicks and keypresses?
Do I have to hook all mouse an keyboard events on the entire system or is there a simpler way?
The panel does not take in text input, you can set your main form to handle the keypress event.
this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.form_KeyPress);
http://screensnapr.com/v/VovWAi.png
As for getting the mouse location on your panel, you can use the mouseclick event
this.panel1.MouseClick += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseClick);
http://screensnapr.com/v/DB3kCQ.png
I have tested it, and it works on a fullsize transparent panel
I've discovered that I can use GetAsyncKeyState to respond to both keypresses and mouse clicks.
[DllImport("user32.dll")]
public static extern int GetAsyncKeyState(System.Windows.Forms.Keys vKey);
Then, I can call GetAsyncKeyState(Keys.LButton) and GetAsyncKeyState(Keys.Escape), for example. Much simpler than hooking all keyboard and mouse events.
Here is the problem:
I have a simple c# form
I have a simple c# user control containing a picturebox and other button.
My form contains one instance of the user control.
I want that when the user do a mouseEnter in the picture box, the mouse cursor change and when the user do a mouseLeave of the picturebox, the mouse go back to normal.
What is happening now is that the events are not fired at all. I put break point into MouseOver, MouseEnter, MouseMove, MouseLeave, etc and none of thems fired. It's the first time I have this problem in C#.
I think it has something to do with the "routed event" but I can't figure it out. If there is another way to achieve what I'm doing, this will also be considered a solution. What is important is that at the end, the user control will be the master of the mouse cursor over his "territory".
Thanks in advance!
What events are you using? The UserController.MouseEnter and UserController.MouseLeave events or the PictureBox.MouseEnter and PictureBox.MouseLeave events?
You should use the latter as the PictureBox will handle the event if the mouse enters the user controller directly through the PictureBox.
As InBetween wrote, PictureBox.MouseXXX should be firing. You can trap those in your UserControl.
If you want the event to be fired on behalf of UserControl, just disable the PictureBox. Be aware though that the event would fire for any mouse position over the UserContrl, not only the PictureBox.