giving a panel focus

giving a panel focus

• Duane Douglas

  You need to call gcnew to create new managed objects.

  
  
  

• ivanL

  Bingo.

  Thanks for bearing with me - and sorry, I should've mentioned Managed C++

  
  

• thmccarthy

  Cool. Try also to consider using a UserControl as it is much lighter than the heavy Form class.
  
  

• Anil Kumar29

  You should set focus to the object itself:

  TextBox txtInput = new TextBox();

  ....

  MyPanel.Controls.Add(txtInput);

  ....

  txtInput->Focus();

  
  
  

• Craig0111

  Ah. I see. This is making sense.

  However, I am still hitting 2 errors (can you tell who is new to this )

  Here is what I did:

  Add->New Item->Windows Form

  I named my new form "frmChildTest"

  Then in "Form1.h" (the parent):

  private: System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e) { Form frm = new frmChildTest(); frm.TopLevel = false; frm.Parent = this; frm.Show(); }

  and I am getting the errors:

  'ModelEditor::frmChildTest' : cannot use 'new' on the reference type; use 'gcnew' instead

  'System::Windows::Forms::Form' : class does not have a copy-constructor

   

  I tried the first line as "Form1 frm = ..." and also "frmChildTest frm = ..." with similar results.

  What am I missing here

  Thanks, again.

   

   edit: thanks for the code tag tip

   

  
  

• QUE??

  Thanks for the reply.

  That makes sense, but it won't seem to let me.

  The object I am adding to the panel is not out of the tool box (it is a seperate graphics display with it's own keyboard input) and when I try your code I get a compile errors about :

  cannot convert 'IObjDisplay*' to 'System::Windows::Forms::Controls^'

  and 'Focus' is not a member of 'IObjDisplay"

  I was trying where the Form is created like this:

  private: System::Void::Form1_Load( etc. etc. ~)

  {

  ObjDisplay = new IObjDisplay(); //This line I already have here works fine

  MyPanel.Controls.Add(ObjDisplay);

  ObjDisplay->Focus();

  }

  Down where the panel is drawn, I am initialising things with:

  private: System::Void MyPanel_Paint_1(etc. etc. ~)

  {

  ObjDisplay->initial((this->MyPanel->Handle.ToPointer()); //my display shows fine in the panel here

  }

  I also tried using your way in that block as well with similar results.

  So I am still a little stuck.

  Any thoughts

  
  

• zaph

  Ah I didn't realize you used Managed C++. As Christian said, use gcnew. This is the code for a child form 'SomeForm' in a parent form 'Form1':

  #include "SomeForm.h" public ref class Form1 : public System::Windows::Forms::Form { private: MCppForm::SomeForm^ m_ChildForm; public: Form1(void) { InitializeComponent(); m_ChildForm = gcnew MCppForm::SomeForm(); m_ChildForm->TopLevel = false; m_ChildForm->Parent = this; m_ChildForm->FormBorderStyle = System::Windows::Forms::FormBorderStyle::None; m_ChildForm->Show(); }

  I've also added the borderstyle code which should be set to none.

  P.s.: the code tags can also take "C++" and "VB" as arguments!

  
  
  

• nmd

  What exactly is the object you are tring to set focus to

  what is its base class

  does a simple textbox instead works with the focus

  
  
  

• Michael K

  First, you should not be using Focus, use Select instead. Read this post on some more information.

  Second, the Panel is a control that is not selectable. It has the ControlStyles.Selectable set to false. Any control derived from panel also cannot be selected. You might want to consider using a different control as a container, like a Form or a UserControl. Forms can also be used as child controls. To do so, set TopLevel to false and Parent to this.

  Form frm = new SomeChildForm(); frm.TopLevel = false; frm.Parent = this; frm.Show();

  P.s.: I saw your comment on the code tags. They work, just use 'code language="C#"' instead of just 'code'.

  
  
  
• giving a panel focus