ComboBox with Tree Dropdown

Environment:VC6, Win200, ME (has not test on other OS)

Using the Class

  1. Just as you normally would, place a ComboBox on the dialog. And name it m_comboBoxFolder.
  2. Add the files ComboBoxFolder.cpp, ComboBoxFolder.h, TreeCtrlFolder.cpp, TreeCtrlFolder.h, Folder.cpp and Folder.h to your project.
  3. Import the bitmap files folder0.bmp and give them resource Ids of "IDB_FOLDER".
  4. In the header file for the dialog, add an include for ComboBoxFolder.h at the top. Manually change variable from CComboBox m_comboBoxFolder; in step 1 to CComboBoxFolder m_comboBoxFolder;
  5. In the dialog's OnInitDialog() function, call m_comboBoxFolder.Init(0, 300) for setting dropped width and height of a tree dropdown.
  • To add path to tree-dropped-down call:
  • m_comboBoxFolder.AddPath("C:\\Windows\\temp");
    
  • Whenever a user selects an item in the tree-dropped-down, a message, WM_SELECTITEM_CHANGE, will be sent to Dialog: A small demo below shows how to catch the message and get parameter has been passed.
    ON_MESSAGE(WM_SELECTITEM_CHANGE, OnSelectItemChange)
    
    long CTestDlg::OnSelectItemChange(WPARAM w, LPARAM l)
    { CString path = "";
     CFolder* folder = (CFolder*) w;
     if (folder != NULL)
       path = folder->m_path;
    
     return 0;
    }
  • To get path selected in the tree-dropped-down call:
    m_comboBoxFolder.GetSelectedPath()
    
I haven't added too much here insofar as explanation of code because the code is included and very easy to understand.


Downloads

Comments

  • There are no comments yet. Be the first to comment!

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  • Your email address will not be published.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

Top White Papers and Webcasts

  • According to a 2014 Javelin Strategy & Research Study, there is a new victim of fraud every two seconds – and that's just in the U.S. With identity theft and consumer fraud rising, and more frequent and sizable data breaches in the news, financial institutions need to work harder than ever to protect their customers and their business. Download this white paper to learn how you can use multi-channel communications to minimize the costs of fraud while also increasing customer loyalty.

  • Today, users, applications, and data exist in more places than ever before, creating an unprecedented challenge for IT. How can IT achieve the flexibility and agility it needs to offer multiple types of applications in multiple locations? To better serve business demands for information everywhere, enterprises must develop new strategies for optimizing multiple kinds of networks. Read this white paper to learn how hybrid networks provide an unprecedented level of network dynamism, enterprise agility, and the …

Most Popular Programming Stories

More for Developers

RSS Feeds

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