How to obtain the focus?

How to obtain the focus?

• muga

  Okay, I had a bit of a play around and I was experiencing the same thing as you were with your code above. 
  
  It seems to be that you are interrupting the mouse processing (by showing a dialog on MouseDown) and causing focus issues.
  
  I found that you could achieve the same thing (without the focus issue), by overridding OnDoubleClick or OnMouseDoubleClick methods instead of the OnMouseDown method. However, these events are only raised when a TreeNode is double-clicked.
  
  

• Kevin MacDonald

  David,
  
  I've solved my issue in a bit interesting way :) I changed inheritance from TreeView to inheritance from PictureBox. That's it. Everything is fine. But very strange solution to me.
  
  By the way, if it's not so hard, please provide me with overriding of OnDoubleClick for possible future using.
  
  Thanks a lot
  truetype
  

• vikasamin

  What has the focus if the MainForm doesn't
  
  Can you post some small code that reproduces it here
  
  

• BillTodd

  
  namespace MainFormNamespace
  {
  public delegate void OpenNewDialogEvent();
  
  public class MainForm : System.Windows.Forms.Form
  {
  private System.ComponentModel.Container components = null;
  private treeViewEnhanced treeView;
  
  public MainForm()
  {
  InitializeComponent();
  }
  
  protected override void Dispose( bool disposing )
  {
  if( disposing )
  {
  if (components != null)
  {
  components.Dispose();
  }
  }
  base.Dispose( disposing );
  }
  
  private void InitializeComponent()
  {
  this.treeView = new treeViewEnhanced();
  
  this.SuspendLayout();
  
  this.treeView.OpenNewDialog += new OpenNewEventDialog(OpenNewDialog);
  
  this.ResumeLayout(false);
  }
  
  private void OpenNewDialog()
  {
  Form NewDialog = new Form();
  
  NewDialog.ShowDialog();
  
  this.Focus();
  }
  
  [STAThread]
  static void Main()
  {
  Application.EnableVisualStyles();
  Application.Run(new MainForm());
  }
  }
  
  public class treeViewEnhanced : System.Windows.Forms.TreeView
  {
  private System.ComponentModel.Container components = null;
  public event OpenNewDialogEvent OpenNewDialog;
  
  public treeViewEnhanced()
  {
  InitializeComponent();
  }
  
  protected override void Dispose( bool disposing )
  {
  if( disposing )
  {
  if(components != null)
  {
  components.Dispose();
  }
  }
  base.Dispose( disposing );
  }
  
  private void InitializeComponent()
  {
  components = new System.ComponentModel.Container();
  }
  
  protected override void OnPaint(PaintEventArgs e)
  {
  e.Graphics.FillRectangle(new SolidBrush(System.Drawing.Color.Olive), new Rectangle(0, 0, 100, 100));
  }
  
  protected override void OnMouseDown(MouseEventArgs e)
  {
  if (e.Clicks == 2)
  {
  if (e.X >= 0 && e.X <= 100 && e.Y >= 0 && e.Y <= 100)
  OpenNewDialog();
  }
  
  this.Invalidate();
  }
  }
  
  }
  
  As I've already stated, if once-clicking is used, then everything is normal.
  
  I didn't put in the code various event handlers (as leave, enter, mouseleave, etc.), as I tried everything and nothing worked properly.
  
  truetype
  

• vvill

  Does this repro without owner drawing the TreeView   Also, could you share the code you're using to launch the dialog
  
  thanks
   - mike
  
  

• musichenryviolin

  Thanks, David
  
  But some problems are still here. I can't find OnMouseDoubleClick method (even in MSDN, by the way, I use .NET 1.x), but OnDoubleClick I do have.
  
  Can't figure out how to use OnDoubleClick or how to override it. Can you help With a little of code.
  
  Also, I noticed that OnDoubleClick has EventArgs as a parameter, but hasn't MouseEventArgs. What if I would desire to determine the coordinates of mouse double-click
  
  truetype
  

• Duckfoot

  Yep, it's the same without owner drawing! But as I stated double-clicking the rectangle in treeview causes dialog to open... Now I've changed double-click to once-click and things worked out. After closing the dialog focus is on the MainForm.
  
  May be this will help helping me... :)
  
  The code of launching the dialog:
  
  myFormClass newDialog = new myFormClass();
  
  DialogResult result = newDialog.ShowDialog();
  
  if (result == DialogResult.OK)
  /*something here*/
  
  this.Focus();
  

• Madhu Ponduru ----MSFT

  David M. Kean wrote:

  What has the focus if the MainForm doesn't <br /><br />Can you post some small code that reproduces it here

  
  
  That is the problem. I can't figure out what has the focus! Can I get by any method, which returns the control that has the focus
  
  I'll post a code in a while...
  
• How to obtain the focus?