DOCUMENT:Q201009 03-MAY-2001 [visualc] TITLE :Sample: WrapTBar.exe Wraps Toolbar During CFrameWnd Resizing PRODUCT :Microsoft C Compiler PROD/VER:winnt:5.0,6.0 OPER/SYS: KEYWORDS:kbfile kbsample kbMFC kbToolbar kbVC500 kbVC600 kbGrpDSMFCATL ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - The Microsoft Foundation Classes (MFC), included with: - Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0 - Microsoft Visual C++, 32-bit Professional Edition, version 5.0 - Microsoft Visual C++, 32-bit Enterprise Edition, version 6.0 - Microsoft Visual C++, 32-bit Professional Edition, version 6.0 - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 ------------------------------------------------------------------------------- SUMMARY ======= WrapTBar.exe is a sample that demonstrates how to implement a toolbar that wraps according to the parent frame size. When the parent CFrameWnd is resized, the toolbar checks whether the new window width is wide enough to display all the buttons on the same row; if not, the toolbar wraps accordingly. If your application requires that all toolbar buttons be accessible at all times, or if it allows the user to customize the toolbar by adding new buttons, you might decide to use this enhancement. The drawback of this sample is that it requires a fixed-size, nondockable toolbar. If you need to implement this behavior for dockable toolbars too, you might need to subclass the docking bar window, associated with the CDockBar class, and provide a new handler for WM_SIZEPARENT message. MORE INFORMATION ================ The following files are available for download from the Microsoft Download Center: WrapTBar.exe For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base: Q119591 How to Obtain Microsoft Support Files from Online Services Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. Once posted, the file is housed on secure servers that prevent any unauthorized changes to the file. File Name Size --------------------------------------------------------- WrapFixedToolBar.h, Implement the CToolBar-derived class WrapFixedToolBar.cpp that would provide the desired behavior. WrapToolBar.h The main header file (CWrapToolBarApp class). WrapToolBar.cpp The main application source file. WrapToolBar.rc Listing of all Windows resources used. res\WrapToolBar.ico Icon file. res\WrapToolBar.rc2 Resources not edited by the IDE. WrapToolBar.clw Information used by ClassWizard. MainFrm.h, MainFrm.cpp The frame class CMainFrame. res\Toolbar.bmp Used to create tiled images for the toolbar. WrapToolBarDoc.h, WrapToolBarDoc.cpp The document CWrapToolBarDoc. WrapToolBarView.h, WrapToolBarView.cpp The view of the document. StdAfx.h, StdAfx.cpp Used to build a precompiled header (PCH) file. Resource.h Defines new resource IDs. The core of this solution relies on handling the MFC private WM_SIZEPARENT message. This message is sent to all child-windows of CFrameWnd-derived classes when the frame window is resized, ensuring the proper negotiation of the client space. By deriving a new class from CToolBar and providing a handler for WM_SIZEPARENT, we solve the problem. The handler resembles the following: LRESULT CWrapFixedToolBar::OnSizeParent(WPARAM, LPARAM lParam) { AFX_SIZEPARENTPARAMS* lpLayout = (AFX_SIZEPARENTPARAMS*)lParam; DWORD dwStyle = RecalcDelayShow(lpLayout); if ((dwStyle & WS_VISIBLE) && (dwStyle & CBRS_ALIGN_ANY) != 0) { CRect rect; rect.CopyRect(&lpLayout->rect); // Reposition buttons on toolbar according to available space. SetWidth(rect.Width()); // Pass message processing to base class handler. CToolBar::OnSizeParent(0, lParam); } return 0; } The CWrapFixedToolBar::SetWidth() function should be implemented as: void CWrapFixedToolBar::SetWidth(long lWidth) { TBBUTTON* pData; // Read the toolbar buttons. int nCount = GetToolBarCtrl().GetButtonCount(); if (nCount != 0) { pData = new TBBUTTON[nCount]; for (int i = 0; i < nCount; i++) _GetButton(i, &pData[i]); } else return; // Get the toolbar buttons offsets in the toolbar area. CRect rect; rect.SetRectEmpty(); CalcInsideRect(rect, TRUE); // Wrap buttons according to available space. WrapToolBar(pData, nCount, lWidth - abs(rect.Width())); // Save toolbar buttons to underlying toolbar control. if (nCount != 0) for (int i = 0; i < nCount; i++) _SetButton(i, &pData[i]); if (pData) delete [] pData; } Finally, change the toolbar creation code in CMainFrame::OnCreate() to make it CBRS_SIZE_FIXED and to disable the docking capabilities. Additional query words: ====================================================================== Keywords : kbfile kbsample kbMFC kbToolbar kbVC500 kbVC600 kbGrpDSMFCATL Technology : kbAudDeveloper kbMFC Version : winnt:5.0,6.0 Issue type : kbhowto ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.