A VisualStudio-like ListBox class

Sample Image

Environment: VC6 SP1, NT4 SP5, WIN 95/98

This article presents an extended listbox control. Its look and feel resembles the one that you can find in the Tools->Options dialog of Visual Studio environment.
As you can see from the picture, this new listbox allows in-place item editing, and adds also the possibility to show a "browse" button near the edit field.
Moreover, since it is derived from a drag listbox, it is also possible to reorder items through drag and drop, or through Alt+Up/Alt+Down keys.

I also wrote a simple "buddy" class, that you can see in the upper part of the picture, that makes the control even easier to use.

How To Use It

To use this listbox class, simply drop a normal listbox on a dialog and associate it with a CListBoxEx class:

// This class overrides the OnBrowseButton method.
class CMyListBoxEx: public CListBoxEx
{
public:

 virtual void OnBrowseButton( int iItem )
 {
  iItem;
  CSHBrowseDlg dlgBrowse;
  if ( dlgBrowse.DoModal() ) SetEditText( dlgBrowse.GetFullPath() );
 };
};

class CListBoxExDemoDlg : public CDialog
{
// Construction
public:
 // standard constructor
 CListBoxExDemoDlg(CWnd* pParent = NULL);	

// Dialog Data
 //{{AFX_DATA(CListBoxExDemoDlg)
 enum { IDD = IDD_LISTBOXEXDEMO_DIALOG };
 CMyListBoxEx	m_ListBoxEx;
 //}}AFX_DATA
};
It's as easy as that! The OnBrowseButton() is called synchronously when the user clicks on the "..." button. Other events that are called are OnBeginEditing() and OnEndEditing().

If you want to use also the buddy class, drop a button on the dialog, change its properties and make it owner-draw and with a client edge.
Then, in your dialog OnInitDialog() subclass the button control in this way:
// Add the listbox buddy
m_ListBoxExBuddy.SubclassDlgItem( IDC_LISTBUDDY, this );
m_ListBoxExBuddy.SetListbox( &m_ListBoxEx );


Other improvements

I added a lot of (I think) useful methods, that add quite a bit of functionality to the raw listbox and make it a bit more user-friendly:

// Editing & drag are anabled by default
void AllowEditing( BOOL bAllowEditing = TRUE )
{
m_bAllowEditing = bAllowEditing;
};

void AllowDrag( BOOL bAllowDrag = TRUE )
{
m_bAllowDrag = bAllowDrag;
};

// Editing methods
void BeginEditing( int iItem );
void EndEditing( BOOL fCancel );

// Add a new empty string and begin editing
void EditNew();

void SetEditStyle( DWORD dwEditStyle );

HWND GetEditHandle() const;

void SetEditText( const CString & strNewText ) const;

// Item methods
int MoveItemUp( int iItem );
int MoveItemDown( int iItem );
void SwapItems( int iFirstItem, int iSecondItem );

void SetItem( int iItem, LPCTSTR szItemText, DWORD dwItemData );
void SetItemText( int iItem, LPCTSTR szItemText );

// Virtual (overridables) events
virtual BOOL OnBeginEditing( int iItem );
virtual BOOL OnEndEditing( int iItem, BOOL fCanceled );

virtual void OnBrowseButton( int iItem );

Downloads

Download demo project - 50 Kb
Download source - 17 Kb


Comments

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Thanks to the Internet of Things (IoT), physical assets are turning into participants in real-time global digital markets. The countless types of assets around us will become as easily indexed, searched and traded as any online commodity. While some industries will be tougher to transform than others – those with physical limitations, such as manufacturing, will be harder to digitize – untold economic opportunities exist for growth and advancement. Our research shows this will create a new "Economy …

  • U.S. companies are desperately trying to recruit and hire skilled software engineers and developers, but there's simply not enough quality talent to go around. In response, companies often resort to inferior solutions -- hiring substandard developers and engineers, recruiting talent on a part-time or temporary basis, poaching people from competitors, or burdening an already stressed IT staff for more of their labor. Fortunately, there's a better solution. Read this white paper to learn the business value of …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date