CODEWITHSUNDEEP
c++mfcoverridingeventhandlerribbon-control
Nika_Rika
Nika_Rika

Reputation: 627

Visual C++ How to override event handler of parant class?

I need to override event wm_lbuttonup of CMFCRibbonSlider class

    class CMyRibbonSlider : public CMFCRibbonSlider
    {
     public:
       virtual void OnLButtonUp(CPoint point); // need this event handler!
    };

    void CMyRibbonSlider::OnLButtonUp(CPoint point)
    {
        AfxMessageBox(_T("Works!"))
        return;
    }

Use CMyRibbonSlider object in MainFrame class 

    class CMainFrame : public CMDIFrameWndEx
    {
    ....
    CMyRibbonSlider*  SliderLine;
    }

When CMFCRibbonSlider control apears and I click left mousebutton, nothing happens. What do I do wrong?

EDIT:

initialization

CArray<CMFCRibbonBaseElement*, CMFCRibbonBaseElement*> ar;
m_wndRibbonBar.GetElementsByID(ID_SLIDER2, RibbonElementsArray);

m_wndRibbonBar.GetElementsByID(ID_START_BTN, ar);
RibbonElementsArray.Append(ar);

m_wndRibbonBar.GetElementsByID(ID_STOP_BTN, ar);
RibbonElementsArray.Append(ar);

m_wndRibbonBar.GetElementsByID(ID_SLIDER_LINE, ar); //HERE!
RibbonElementsArray.Append(ar);

m_wndRibbonBar.GetElementsByID(IDC_STATIC_TT, ar);
RibbonElementsArray.Append(ar);

Slider = DYNAMIC_DOWNCAST(CMFCRibbonSlider, RibbonElementsArray[0]);
btnStart = DYNAMIC_DOWNCAST(CMFCRibbonButton, RibbonElementsArray[1]);
btnStop = DYNAMIC_DOWNCAST(CMFCRibbonButton, RibbonElementsArray[2]);
SliderLine = (CMyRibbonSlider*)DYNAMIC_DOWNCAST(CMFCRibbonSlider, RibbonElementsArray[3]); //and HERE!
TmpLable = DYNAMIC_DOWNCAST(CMFCRibbonLabel, RibbonElementsArray[4]);

also I have these event handlers in Mainframe class and they work:

ON_UPDATE_COMMAND_UI(ID_SLIDER_LINE, &CMainFrame::OnUpdateSliderLine)
ON_COMMAND(ID_SLIDER_LINE, &CMainFrame::OnSliderLine)

SliderLine->GetPos() also returns right slider position, so I think initialization is right...

Upvotes: 0

Views: 804

Answers (1)

Victor
Victor

Reputation: 8950

It is seem like the CMFCRibbonSlider control isn't added correctly to CMFCRibbonPanel and therefore CMainFrame class does not expose slider’s messages through message map. Try to use a method described in the following article: Walkthrough: Creating a New Ribbon Application By Using MFC

The code will be look like below.

MyRibbonSlider.h 

#include "afxribbonslider.h"
#pragma once

class CMyRibbonSlider : public CMFCRibbonSlider
{
    DECLARE_DYNCREATE(CMyRibbonSlider)
public:
    CMyRibbonSlider();
    CMyRibbonSlider(UINT nID, int nWidth = 100);

// Implementation
public:
    virtual ~CMyRibbonSlider();
    virtual void OnLButtonUp(CPoint point); 
};

MyRibbonSlider.cpp 

#include "stdafx.h"
#include "MyRibbonSlider.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

IMPLEMENT_DYNCREATE(CMyRibbonSlider, CMFCRibbonSlider)

CMyRibbonSlider::CMyRibbonSlider()
{
}

CMyRibbonSlider::CMyRibbonSlider(UINT nID, int nWidth)
    : CMFCRibbonSlider(nID, nWidth)
{   
}

CMyRibbonSlider::~CMyRibbonSlider()
{
}

void CMyRibbonSlider::OnLButtonUp(CPoint point)
{
    TRACE("\nCMyRibbonSlider::OnLButtonUp()");
    return;
}

Related declarations in the CMainFrame.h

afx_msg void OnSliderLine();
afx_msg void OnUpdateSliderLine(CCmdUI* pCmdUI);

CMainFrame.cpp

BEGIN_MESSAGE_MAP(CMainFrame, CMDIFrameWndEx)
    ...
    ON_COMMAND(ID_SLIDER, &CMainFrame::OnSliderLine)
    ON_UPDATE_COMMAND_UI(ID_SLIDER, &CMainFrame::OnUpdateSliderLine)
END_MESSAGE_MAP()

void CMainFrame::InitializeRibbon()
{
    ...
    bNameValid = strTemp.LoadString(*your title*);
    ASSERT(bNameValid);
    CMFCRibbonPanel* pPanelAdvanced = pCategoryHome->AddPanel(strTemp, m_PanelImages.ExtractIcon (*your icon*));    
    strTemp = _T("Slider"); 
    CMyRibbonSlider* pRibbonSlider = new CMyRibbonSlider(ID_SLIDER);
    pPanelAdvanced->Add(pRibbonSlider);
    ...
}

void CMainFrame::OnSliderLine()
{
    // TODO
}

void CMainFrame::OnUpdateSliderLine(CCmdUI* pCmdUI)
{
    // TODO
}

Upvotes: 1

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