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

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  • Your email address will not be published.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

Top White Papers and Webcasts

  • Tintri smart storage addresses the mismatch between storage and the demands of virtualization. Built on the industry's first and leading intelligent application-aware architecture, VMstore and Tintri Global Center have the intelligence to deliver unparalleled performance and efficiency and end-to-end insights into the infrastructure, while allowing for unmatched VM control.

  • The 3rd Platform of computing, based around the four pillars of mobile computing, social media, big data and analytics, and cloud, is redefining what IT infrastructure needs to provide. Endpoint solutions must meet not only traditional data protection requirements, but also a new set of requirements driven by the explosion in mobile computing. This IDC white paper explores the customer challenges associated with safeguarding data residing on various endpoint devices, including laptops, tablets, and …

Most Popular Programming Stories

More for Developers

RSS Feeds

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