Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Language: C++
Expertise: Beginner
Mar 25, 1997



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Can I programmatically move a control in a window in Visual C++?

I'm beginning the design of an application where it would be advantageous to be able to programmatically move the position of a control on its form. Is it possible to do this using Visual C++?

Yes, all control classes (ie CEdit, CListBox, CStatic, etc) in Visual C++ are derived from CWnd, the base class containing all the fundamental functionality of a Window. Please keep in mind that neither CWnd nor any of its decendents are Window Controls but are merely C++ classes that strongly wrap Window API functions that permit communication with Window Controls such as sending a message to control to reposition itself. Hence having said that, to reposition a control on a window using Visual C++ with MFC, you could call either CWnd:: MoveWindow or CWnd:: SetWindowPos depending your needs. MoveWindow allows you to change the position and dimensions of a specified Window Control, and SetWindowPos allows you to change the position, dimensions and Z-order of a child, popup and top level windows. Z-order is the order of window on a stack of windows that reside on the Z axis which is an imaginary line that sticks straight out from the screen. For example if you want to move a button control on a CFormView derived class 26 screen units (pixels) down the Y axis from its current position you could do the following: 1. void CMyFormView::OnInitialUpdate() 2. { 3. CFormView::OnInitialUpdate(); 4. 5. // Retrieve a pointer to the button control. 6. CButton* pBtn = (CButton*)GetDlgItem(IDC_BUTTON1); 7. ASSERT(pBtn); 8. // Structure used to store the button control's dimensions. 9. RECT rect; 10. // Get button control's dimensions with respect to the screen. 11. pBtn->GetWindowRect(&rect); 12. // Convert the button control's dimensions with respect to its parent window. 13. ScreenToClient(&rect); 14. // Adjust button control's dimensions +26 pixels down the Y axis. 15. rect.top +=26; 16. rect.bottom +=26; 17. 18. // Move the button control 26 pixels down the Y axis. 19. pBtn->MoveWindow(&rect); 20. }

DevX Pro
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



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