Mouse Wheel scrolling support for MFC application.
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Hi sir, i am working on MFC VC++ and i am very new to MFC application development. kindly please help me. our application tool have a vertical scrollbar. it's working with the dragging.but not working with the mouse wheel. kindly please let me know what kind of code support have to give for mouse wheel. i am using the below classes for creating the frame window. 1.class CMainFrame : public CFrameWndEx { ....... CMainFrame(); // main SDI frame window ........... } int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (!CreateToolBar()) { TRACE0("Failed to create Ribbon bar\n"); return -1; // fail to create } if (!m_wndStatusBar.Create(this) ) { TRACE0("Failed to create status bar\n"); return -1; // fail to create }
m_wndStatusBar.AddElement(new CMFCRibbonStatusBarPane(ID_STATUSBAR_STATUS, csStatus, TRUE), csStatus);
m_wndStatusBar.AddSeparator();
m_wndStatusBar.AddElement(new CMFCRibbonStatusBarPane(ID_STATUSBAR_VER, csVersion, TRUE), csVersion);
m_wndStatusBar.AddSeparator();
m_wndStatusBar.AddElement(new CMFCRibbonStatusBarPane(ID_STATUSBAR_MEMORY, csMemory, TRUE), csMemory);
m_wndStatusBar.AddSeparator();
m_wndStatusBar.AddElement(new CMFCRibbonStatusBarPane(ID_STATUSBAR_SECURITY, csSecurity, TRUE), csSecurity);theApp.SetMainFrame(this);}
kindly please let me know how to handle the mouse wheel messages and what are steps have to follow to enable this.
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Hi sir, i am working on MFC VC++ and i am very new to MFC application development. kindly please help me. our application tool have a vertical scrollbar. it's working with the dragging.but not working with the mouse wheel. kindly please let me know what kind of code support have to give for mouse wheel. i am using the below classes for creating the frame window. 1.class CMainFrame : public CFrameWndEx { ....... CMainFrame(); // main SDI frame window ........... } int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (!CreateToolBar()) { TRACE0("Failed to create Ribbon bar\n"); return -1; // fail to create } if (!m_wndStatusBar.Create(this) ) { TRACE0("Failed to create status bar\n"); return -1; // fail to create }
m_wndStatusBar.AddElement(new CMFCRibbonStatusBarPane(ID_STATUSBAR_STATUS, csStatus, TRUE), csStatus);
m_wndStatusBar.AddSeparator();
m_wndStatusBar.AddElement(new CMFCRibbonStatusBarPane(ID_STATUSBAR_VER, csVersion, TRUE), csVersion);
m_wndStatusBar.AddSeparator();
m_wndStatusBar.AddElement(new CMFCRibbonStatusBarPane(ID_STATUSBAR_MEMORY, csMemory, TRUE), csMemory);
m_wndStatusBar.AddSeparator();
m_wndStatusBar.AddElement(new CMFCRibbonStatusBarPane(ID_STATUSBAR_SECURITY, csSecurity, TRUE), csSecurity);theApp.SetMainFrame(this);}
kindly please let me know how to handle the mouse wheel messages and what are steps have to follow to enable this.
The wheel scrolling has to be performed by the window which content should be scrolled by handling the WM_MOUSEWHEEL message | Microsoft Docs[^]. If that window is
CWndbased, just override theOnMouseWheel()function. I can not give more information because you did not give any information about your window. With frame based MFC applications, that are usually theCViewderived classes. -
The wheel scrolling has to be performed by the window which content should be scrolled by handling the WM_MOUSEWHEEL message | Microsoft Docs[^]. If that window is
CWndbased, just override theOnMouseWheel()function. I can not give more information because you did not give any information about your window. With frame based MFC applications, that are usually theCViewderived classes.hi sir, i wrote the code below, the code is hitting whenever my mouse wheel scrolling. but the vertical scroll bar not moving.could you please give me your input please. Header file: class CMainFrame : public CFrameWndEx { protected: // create from serialization only CMainFrame(); DECLARE_DYNCREATE(CMainFrame) public: afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt); }; source file : IMPLEMENT_DYNCREATE(CMainFrame, CFrameWndEx) BEGIN_MESSAGE_MAP(CMainFrame, CFrameWndEx) ON_WM_MOUSEWHEEL() END_MESSAGE_MAP() BOOL CMainFrame::OnMouseWheel(UINT fFlags, short zDelta, CPoint point) { TRACE0("in CMainFrame:: OnMouseWheel function"); return CWnd :: OnMouseWheel(fFlags, zDelta, point); } here CMainFrame is derived from CFrameWndEx, CFrameWndEx id derived from the CFrameWnd, CFrameWnd class is derived from the CWnd. could you please help me if did any wrong.
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hi sir, i wrote the code below, the code is hitting whenever my mouse wheel scrolling. but the vertical scroll bar not moving.could you please give me your input please. Header file: class CMainFrame : public CFrameWndEx { protected: // create from serialization only CMainFrame(); DECLARE_DYNCREATE(CMainFrame) public: afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt); }; source file : IMPLEMENT_DYNCREATE(CMainFrame, CFrameWndEx) BEGIN_MESSAGE_MAP(CMainFrame, CFrameWndEx) ON_WM_MOUSEWHEEL() END_MESSAGE_MAP() BOOL CMainFrame::OnMouseWheel(UINT fFlags, short zDelta, CPoint point) { TRACE0("in CMainFrame:: OnMouseWheel function"); return CWnd :: OnMouseWheel(fFlags, zDelta, point); } here CMainFrame is derived from CFrameWndEx, CFrameWndEx id derived from the CFrameWnd, CFrameWnd class is derived from the CWnd. could you please help me if did any wrong.
Member 13903818 wrote:
here CMainFrame is derived from CFrameWndEx, CFrameWndEx id derived from the CFrameWnd, CFrameWnd class is derived from the CWnd.
But do your application also have one or more Views (CView/CScrollView/CForView/... derived classes)?
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Member 13903818 wrote:
here CMainFrame is derived from CFrameWndEx, CFrameWndEx id derived from the CFrameWnd, CFrameWnd class is derived from the CWnd.
But do your application also have one or more Views (CView/CScrollView/CForView/... derived classes)?
yes ..... (class CFormView : public CScrollView class CScrollView : public CView) in our application we are deriving the class from the CView like below. class CCommonEDM_AVitarView : public CView in above derived call i have handled the OnMouseWheel function. but it's not hitting the code while scrolling the mouse wheel. code : Header file: class CCommonEDM_AVitarView : public CView { protected: // create from serialization only CCommonEDM_AVitarView(); DECLARE_DYNCREATE(CCommonEDM_AVitarView) public: afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt); }; source file : IMPLEMENT_DYNCREATE(CCommonEDM_AVitarView, CView) BEGIN_MESSAGE_MAP(CCommonEDM_AVitarView, CView) ON_WM_MOUSEWHEEL() END_MESSAGE_MAP() BOOL CCommonEDM_AVitarView::OnMouseWheel(UINT fFlags, short zDelta, CPoint point) { TRACE0("in CCommonEDM_AVitarView:: OnMouseWheel function"); return CView :: OnMouseWheel(fFlags, zDelta, point); } i am not understanding how internal child windows are working with mouse wheel scrolling. but main window is not working..
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yes ..... (class CFormView : public CScrollView class CScrollView : public CView) in our application we are deriving the class from the CView like below. class CCommonEDM_AVitarView : public CView in above derived call i have handled the OnMouseWheel function. but it's not hitting the code while scrolling the mouse wheel. code : Header file: class CCommonEDM_AVitarView : public CView { protected: // create from serialization only CCommonEDM_AVitarView(); DECLARE_DYNCREATE(CCommonEDM_AVitarView) public: afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt); }; source file : IMPLEMENT_DYNCREATE(CCommonEDM_AVitarView, CView) BEGIN_MESSAGE_MAP(CCommonEDM_AVitarView, CView) ON_WM_MOUSEWHEEL() END_MESSAGE_MAP() BOOL CCommonEDM_AVitarView::OnMouseWheel(UINT fFlags, short zDelta, CPoint point) { TRACE0("in CCommonEDM_AVitarView:: OnMouseWheel function"); return CView :: OnMouseWheel(fFlags, zDelta, point); } i am not understanding how internal child windows are working with mouse wheel scrolling. but main window is not working..
The MFC document - view concept is a little bit complicated regarding the parent and child windows and their interaction. But the message is sent to the control / window that has the focus. If your view contains controls then one of them probably has the focus and gets the message. It is still unclear to which window your scroll bars belong. If they are for the view: why is your view not
CScrollViewbased? If your view contains a single control: handle the message there. -
The MFC document - view concept is a little bit complicated regarding the parent and child windows and their interaction. But the message is sent to the control / window that has the focus. If your view contains controls then one of them probably has the focus and gets the message. It is still unclear to which window your scroll bars belong. If they are for the view: why is your view not
CScrollViewbased? If your view contains a single control: handle the message there.Hello sir, i have written the below code for my each child frame. this class is derived from the CScrollView. my mouse wheel is working fine for each individual window class. but i am trying to implement same support from my main window class.but mouse wheel is not working. could you please give me your valuable inputs. My intention is instead of writing mouse wheel code for all the child class. if i implement mouse wheel function for my main frame. i would have been worth to all child classes. my individual window class code : mouse while is working with below code with below class.. Header file: class CAboutView : public CFormView { ----------- afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt); } Source file : BEGIN_MESSAGE_MAP(CAboutView, CFormView) //ON_WM_MOUSEWHEEL() END_MESSAGE_MAP() BOOL CAboutView::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt) { return DoMouseWheel(nFlags, zDelta, pt); } This is my main frame: with the below code my mouse wheel not working. Header file : class CMainFrame : public CFrameWndEx { ----------- afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt); } Source file : BEGIN_MESSAGE_MAP(CMainFrame, CFrameWndEx) ON_WM_MOUSEWHEEL() END_MESSAGE_MAP() BOOL CMainFrame::OnMouseWheel(UINT fFlags, short zDelta, CPoint point) { CScrollView *wnd = NULL; BOOL mValue; mValue = wnd->DoMouseWheel(fFlags, zDelta, point); return mValue; }
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Hello sir, i have written the below code for my each child frame. this class is derived from the CScrollView. my mouse wheel is working fine for each individual window class. but i am trying to implement same support from my main window class.but mouse wheel is not working. could you please give me your valuable inputs. My intention is instead of writing mouse wheel code for all the child class. if i implement mouse wheel function for my main frame. i would have been worth to all child classes. my individual window class code : mouse while is working with below code with below class.. Header file: class CAboutView : public CFormView { ----------- afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt); } Source file : BEGIN_MESSAGE_MAP(CAboutView, CFormView) //ON_WM_MOUSEWHEEL() END_MESSAGE_MAP() BOOL CAboutView::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt) { return DoMouseWheel(nFlags, zDelta, pt); } This is my main frame: with the below code my mouse wheel not working. Header file : class CMainFrame : public CFrameWndEx { ----------- afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt); } Source file : BEGIN_MESSAGE_MAP(CMainFrame, CFrameWndEx) ON_WM_MOUSEWHEEL() END_MESSAGE_MAP() BOOL CMainFrame::OnMouseWheel(UINT fFlags, short zDelta, CPoint point) { CScrollView *wnd = NULL; BOOL mValue; mValue = wnd->DoMouseWheel(fFlags, zDelta, point); return mValue; }
It is still unclear for which window you want to handle the scrolling. If it is working in the views, all should be fine. Because the views show the content which might be scrolled. The frame windows are parents of the views providing the frame and the caption bar. They did not know about the content of the client area (the view) and can therefore not know how to scroll the content. I suggest to read about about the MFC document view architecture. Some links: Document-View Architecture[^] Multiple Document Types, Views, and Frame Windows[^] Frame Windows[^] Relationships Among MFC Objects[^]