If I register a class handler like so:
EventManager.RegisterClassHandler(
typeof(ListBoxItem),
DropEvent,
new RoutedEventHandler(OnListBoxItemDropEvent));
The following method signature is expected:
private void OnListBoxItemDropEvent(object sender, RoutedEventArgs e)
The standard Drop method signature is the following:
private void Drop(object sender, DragEventArgs e)
i.e. it gives you access to the DragEventArgs e
Is there a way for me to access the DragEventArgs e when registering a routed event handler?
How about creating a DragEventHandler (instead of a RoutedEventHandler)?:
EventManager.RegisterClassHandler(
typeof(ListBoxItem),
DropEvent,
new DragEventHandler(Drop));
Related
I have added a DataGridViewCheckBoxColumn in a datagridview and want to commit changes in database on checking and unchecking this checkboxcolumn. Please assist.
Thanks.
try this:
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
}
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
Debug.WriteLine(dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value);
}
in CellValueChanged Event you can retrieve the changed value only if you called CommitEdit before ...
I am working on a windows form that is covered in panels representing a grid.
I'm trying to create an event handler that handles all mouse clicks regardless of which panel the click occurs on and then moves a PictureBox to the location of the panel.
I managed to find a topic that covered the event handler, but I am unable to get the location of the mouse click from the event handler. Below is the code I have so far (mostly pinched from another post):
private void Form1_Load(object sender, EventArgs e)
{
foreach (Control c in this.Controls)
{
c.MouseClick += new MouseEventHandler(myEvent_handler_click);
}
}
public void myEvent_handler_click(object sender, EventArgs e)
{
Point point = new Point(e.X, e.Y);
game.MoveToSquare(point);
}
The line of code Point point = new Point(e.X, e.Y); doesn't work because I can't refer to the X of e or the Y of e.
How can I get the location of the mouse at the time it is clicked?
Any help is appreciated. Feel free to ask me more questions if I wasn't clear enough!
The delegate for the event handler is defined like so:
public delegate void MouseEventHandler(object sender, MouseEventArgs e);
MouseEventArgs inherits from EventArgs, that's why your code is working. If you change the definition of your EventHandler, you should be able to access the coordinates:
public void myEvent_handler_click(object sender, MouseEventArgs e)
{
Point point = new Point(e.X, e.Y);
}
You can also simply access e.Location to get point:
Point point = e.Location;
I'm newbie in Silverlight and I need to activate MouseRightButtonDown(object sender, MouseButtonEventArgs e) from an another event handler in my application.
I have found, that in WPF it is possible to do somthing like this:
public void OnContextMenuOpened(object sender, RoutedEventArgs e) {
MouseButtonEventArgs args = new MouseButtonEventArgs(
InputManager.Current.PrimaryMouseDevice,
0,
MouseButton.Right);
MouseRightButtonDown(sender, args);
}
But I have in Silverlight neither InputManager-Class nor MouseButton-Class... It is generally possible to realise something like that?
I want to do it, because I try to select an DataGridRow(within an custom control) with help of right-mouse-button. Without context menu it is easily possible, but when I switch context menu on, then context menu opens and event will not fired...
My code snippet:
public override void OnApplyTemplate() {
DataGrid = (DataGrid)GetTemplateChild("DataGrid");
DataGrid.MouseRightButtonDown += DataGridMouseRightButtonDown;
ContextMenu = (ContextMenu)GetTemplateChild("ContextMenu");
ContextMenu.Opened += OnContextMenuOpened;
}
private void DataGridMouseRightButtonDown(object sender, MouseButtonEventArgs e) {
//My code to select an DataGridRow
}
public void OnContextMenuOpened(object sender, RoutedEventArgs e) {
//This event-handler now will be always activated if I do
//right-mouse-button-click
}
Thanks a lot for help!
The Results of my research has shown, that it is impossible in silverlight -.-
Right now, I'm calling the win32 createcaret/showcaret in the keypress event of my masked textbox. That changes it fine. I want the caret to change when the box is entered, though, either by tab or by click.
Unfortunately the enter event or even the invalidate event aren't suitable places to change that caret. It doesn't change, maybe because they fire too early.
So anyway, how can I get the caret to change on textbox enter without handling it in the enter event?
You need to add DestroyCaret to your routine, too:
private void Form1_Load(object sender, EventArgs e)
{
textBox1.GotFocus += new EventHandler(textBox1_GotFocus);
textBox1.LostFocus += new EventHandler(textBox1_LostFocus);
}
private void textBox1_GotFocus(object sender, EventArgs e)
{
CreateCaret(textBox1.Handle, IntPtr.Zero, 6, textBox1.Height);
ShowCaret(textBox1.Handle);
}
private void textBox1_LostFocus(object sender, EventArgs e)
{
DestroyCaret();
}
WPF : How to get mouse position in Window_Loaded(object sender, RoutedEventArgs e) event
Have you tried using PointToScreen(Mouse.GetPosition(this)) ?
(in the System.Windows.Input namespace)