Hii I am making a windows Form application
I added a user control in that application
Is there a way to disable the right click event.
because if I use
Button.click += SomeMethod
It is going to someMethod in case of both (left and right) clicks.
I want to do this action in case of left click only.
Can't you handle which button has been clicked inside of the event?
private void uc_MouseClick(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
//more logic here
}
}
You can detect which button of mouse was clicked inside event handler.
Check MouseEventArgs e argument of handler
You can check the button and call the native onClick for cases of left-button click.
[pseudo code]
SomeMethod(e){
if (e.Button == left){
control.onClick(e);
}
}
you could do number of ways;
1) if you want to use your button.click event then do the code below:
Button.Click += SomeMethod;
private void SomeMethod(object sender, EventArgs e)
{
System.Windows.Forms.Button bt = sender as System.Windows.Forms.Button;
if (bt != null)
{
if (bt.Equals(System.Windows.Forms.MouseButtons.Left))
{
// do something;
}
}
}
2) Or use the mouse clicked event in windows form "button.MouseClick".
Button.MouseClick += SomeMethod;
private void SomeMethod(object sender, MouseEventArgs e)
{
if (!e.Button.Equals(System.Windows.Forms.MouseButtons.Right))
{
// do work
}
}
I was hoping that we could use the e.Handled = true, but in this case neither of the event argument has the Handled property, therefore you have to manually check them.
Related
Just out of curiosity, how do you stop the DataGridView.Click event from stealing the "thunder" from the RowHeaderMouseClick event?
When I click the ROW HEADER, the DataGridView.Click event is fired.
When I DISABLE the DataGridView.Click event, the RowHeaderMouseClick event is fired, as desired.
Apparently, the ROW HEADER is part of the DataGridView--therefore, I guess, technically, it is performing as it should.
Instead of the Click event, you may use the MouseClick event, which will allow you to easily perform a HitTest() to get information about where the click has occurred.
Here's an example:
private void dataGridView1_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
Console.WriteLine("RowHeaderMouseClick");
}
private void dataGridView1_MouseClick(object sender, MouseEventArgs e)
{
var hitTestInfo = dataGridView1.HitTest(e.X, e.Y);
if (hitTestInfo.Type == DataGridViewHitTestType.RowHeader) return;
// Row header clicks won't trigger the following line.
Console.WriteLine("MouseClick");
}
Technically, you could do the same thing with the Click event:
private void dataGridView1_Click(object sender, EventArgs e)
{
var cursorPos = dataGridView1.PointToClient(Cursor.Position);
var hitTestInfo = dataGridView1.HitTest(cursorPos.X, cursorPos.Y);
if (hitTestInfo.Type == DataGridViewHitTestType.RowHeader) return;
Console.WriteLine("Click");
}
But there's really no reason to since MouseClick already gives you the location of the cursor out of the box.
In a form I have a tab container in which I dynamically add tabs through the use of a button. As there is no easy way that I know of (then again I'm a WinForms newbie) to close the selected tab, I'd like to set up an event handler for handling a right click through which the tab will close. In simple words I want to right-click on the selected tab in order to close it.
This is the event handler which I have written (yet doesn't work):
private void tab_Click(object sender, EventArgs e)
{
MouseEventArgs me = (MouseEventArgs)e;
if (sender == tabControl1.SelectedTab && me.Button == MouseButtons.Right)
{
tabControl1.TabPages.Remove(tabControl1.SelectedTab);
}
}
I guess it's too naive of an approach? The handler does not even register the right click when I click on the tab. Any suggestions how to make this work?
private void tabControl1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
Application.Exit();
}
else
{
}
}
You've got very iffy code here. Don't blindly cast an EventArgs object, simply use the MouseClick event instead. Don't blindly hope that the SelectedTab is the one that was clicked, that happen later. And never, never use the Remove() method like that, it is super-duper important to dispose the TabPage and its controls. If you don't then those controls will permanently leak, the kind of bug that eventually crashes your program with an undebuggable exception like "Error creating window".
Make it look like this instead:
private void tabControl1_MouseClick(object sender, MouseEventArgs e) {
if (e.Button == MouseButtons.Right) {
for (int ix = 0; ix < tabControl1.TabCount; ++ix) {
if (tabControl1.GetTabRect(ix).Contains(e.Location)) {
tabControl1.TabPages[ix].Dispose();
break;
}
}
}
}
I am new to WinForms events and I am getting a strange error.Well I write when I start my control:
this.MouseUp += MouseUpMethod;
But the problem is, when I release the mouse button out of my control, the program recognize as I release the mouse over the Control. I am not able to understand this error.
Did ever someone got this error?
It's because, by default, your control captures mouse. Just set Control.Capture to false somewhere in your MouseDown event handler, for example:
void MouseDown(object sender, MouseEventArgs e) {
this.Capture = false;
}
As alternative just check in MouseUp that mouse is still inside your control:
void MouseUp(object sender, MouseEventArgs e) {
if (ClientRectangle.Contains(PointToClient(Cursor.Position))) {
// Your code here
}
}
see, you need to associate event with event handler just after your InitializeComponent()
public Form1()
{
InitializeComponent();
this.button2.MouseUp += new System.Windows.Forms.MouseEventHandler(this.button2_MouseUp);
}
then your event handler should be
private void button2_MouseUp(object sender, MouseEventArgs e)
{
//Do stuff here
}
I need to determine if the value of a NumericUpDown control was changed by a mouseUp event.
I need to call an expensive function when the value of a numericupdown has changed. I can't just use "ValueChanged", I need to use MouseUp and KeyUp events.
Basically, I need to know:
Did the value of the numericUpDown change when the user let go of the
mouse? If any area which is not highlighted in red is clicked, the
answer is no. I need to IGNORE the mouse up event, when ANYWHERE but the red area is clicked.
How can I determine this by code? I find events a little confusing.
This will fire when the user releases the mouse button. You might want to investigate which mousebutton was released.
EDIT
decimal numvalue = 0;
private void numericUpDown1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && numvalue != numericUpDown1.Value)
{
//expensive routines
MessageBox.Show(numericUpDown1.Value.ToString());
}
numvalue = numericUpDown1.Value;
}
EDIT 2
This will determine if the left mousebutton is still down, if it is exit before performing expensive routine, doesn't help with keyboard button down.
private void numericUpDown1_ValueChanged(object sender, EventArgs e)
{
if ((Control.MouseButtons & MouseButtons.Left) == MouseButtons.Left)
{
return;
}
//expensive routines
}
Edit 3
How to detect the currently pressed key?
Will help solve the Any key down, Though I think the only ones that matter are the arrow keys
Problem - I need to IGNORE the mouse up event, when ANYWHERE but the red area is clicked.
Derive a custom numeric control as shown below. Get the TextArea of the Numeric Control and ignore the KeyUp.
class UpDownLabel : NumericUpDown
{
private Label mLabel;
private TextBox mBox;
public UpDownLabel()
{
mBox = this.Controls[1] as TextBox;
mBox.Enabled = false;
mLabel = new Label();
mLabel.Location = mBox.Location;
mLabel.Size = mBox.Size;
this.Controls.Add(mLabel);
mLabel.BringToFront();
mLabel.MouseUp += new MouseEventHandler(mLabel_MouseUp);
}
// ignore the KeyUp event in the textarea
void mLabel_MouseUp(object sender, MouseEventArgs e)
{
return;
}
protected override void UpdateEditText()
{
base.UpdateEditText();
if (mLabel != null) mLabel.Text = mBox.Text;
}
}
In the MainForm, update your designer with this control i.e. UpDownLabel:-
private void numericUpDown1_MouseUp(object sender, MouseEventArgs e)
{
MessageBox.Show("From Up/Down");
}
Referred from - https://stackoverflow.com/a/4059473/763026 & handled the MouseUp event.
Now, use this control instead of the standard one and hook on the
KeyUp event. You will always get the KeyUp event from the Up/Down button only i.e. RED AREA when you click the
spinner [Up/Down button, which is again a different control derived
from UpDownBase].
I think you should use Leave event that when the focus of NumericUpDown control gone, it would called.
int x = 0;
private void numericUpDown1_Leave(object sender, EventArgs e)
{
x++;
label1.Text = x.ToString();
}
I have a button that I trigger OnClick whenever there is a click on that button. I would like to know which Mouse button clicked on that button?
When I use the Mouse.LeftButton or Mouse.RightButton, both tell me "realsed" which is their states after the click.
I just want to know which one clicked on my button. If I change EventArgs to MouseEventArgs, I receive errors.
XAML: <Button Name="myButton" Click="OnClick">
private void OnClick(object sender, EventArgs e)
{
//do certain thing.
}
You can cast like below:
MouseEventArgs myArgs = (MouseEventArgs) e;
And then get the information with:
if (myArgs.Button == System.Windows.Forms.MouseButtons.Left)
{
// do sth
}
The solution works in VS2013 and you do not have to use MouseClick event anymore ;)
If you're just using the Button's Click event, then the only mouse button that will fire it is the primary mouse button.
If you still need to know specifically whether it was the left or right button, then you can use the SystemInformation to obtain it.
void OnClick(object sender, RoutedEventArgs e)
{
if (SystemParameters.SwapButtons) // Or use SystemInformation.MouseButtonsSwapped
{
// It's the right button.
}
else
{
// It's the standard left button.
}
}
Edit: The WPF equivalent to SystemInformation is SystemParameters, which can be used instead. Though you can include System.Windows.Forms as a reference to obtain the SystemInformation without adversely effecting the application in any way.
You're right, Jose, it's with MouseClick event. But you must add a little delegate:
this.button1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.MyMouseDouwn);
And use this method in your form:
private void MyMouseDouwn(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
this.Text = "Right";
if (e.Button == MouseButtons.Left)
this.Text = "Left";
}