改變CMFCRibbonBar高度

本文作者：無幻
測試環境：Windows XP
開發環境：Visual Studio 2010

      要改變CMFCRibbonBar的高度，需要重載CalcFixedLayout函數，例如如下：

標頭檔：

#pragma once//////////////////////////////////////////////////////////////////////////// CKofMFCRibbonQuickAccessToolBarclass CKofMFCRibbonQuickAccessToolBar : public CMFCRibbonQuickAccessToolBar{friend class CKofMFCRibbonBar;};//////////////////////////////////////////////////////////////////////////// CKofMFCRibbonBarclass CKofMFCRibbonBar : public CMFCRibbonBar{DECLARE_DYNAMIC(CKofMFCRibbonBar)public:CKofMFCRibbonBar(BOOL bReplaceFrameCaption = TRUE);virtual ~CKofMFCRibbonBar();protected:virtual CSize CalcFixedLayout(BOOL bStretch, BOOL bHorz);DECLARE_MESSAGE_MAP()};

實現檔案：

#include "stdafx.h"#include "KofMFCRibbonBar.h"static const int nXTabMargin = 14;static const int nYTabMargin = 5;static const int nXMargin = 2;static const int nYMargin = 2;//////////////////////////////////////////////////////////////////////////// CKofMFCRibbonBarIMPLEMENT_DYNAMIC(CKofMFCRibbonBar, CMFCRibbonBar)CKofMFCRibbonBar::CKofMFCRibbonBar(BOOL bReplaceFrameCaption /*= TRUE*/): CMFCRibbonBar(bReplaceFrameCaption){}CKofMFCRibbonBar::~CKofMFCRibbonBar(){}BEGIN_MESSAGE_MAP(CKofMFCRibbonBar, CMFCRibbonBar)END_MESSAGE_MAP()CSize CKofMFCRibbonBar::CalcFixedLayout( BOOL bStretch, BOOL bHorz ){ASSERT_VALID(this);CClientDC dc(this);CFont* pOldFont = dc.SelectObject(GetFont());ENSURE(pOldFont != NULL);TEXTMETRIC tm;dc.GetTextMetrics(&tm);//“標題”的高度m_nCaptionHeight = 0;if (m_bReplaceFrameCaption){m_nCaptionHeight = GetSystemMetrics(SM_CYCAPTION) + 1;if (afxGlobalData.DwmIsCompositionEnabled()){m_nCaptionHeight += GetSystemMetrics(SM_CYSIZEFRAME);}}int cy = 0;CSize sizeMainButton = m_sizeMainButton;double scale = afxGlobalData.GetRibbonImageScale();if (scale > 1.){sizeMainButton.cx = (int)(.5 + scale * sizeMainButton.cx);sizeMainButton.cy = (int)(.5 + scale * sizeMainButton.cy);}if (m_dwHideFlags & AFX_RIBBONBAR_HIDE_ALL){cy = m_nCaptionHeight;}else{if (m_bRecalcCategoryHeight){m_nCategoryHeight = 0;}//“選項卡”的高度m_nTabsHeight = tm.tmHeight + 2 * nYTabMargin;if (m_bRecalcCategoryHeight){for (int i = 0; i < m_arCategories.GetSize(); i++){CMFCRibbonCategory* pCategory = m_arCategories [i];ASSERT_VALID(pCategory);m_nCategoryHeight = max(m_nCategoryHeight, pCategory->GetMaxHeight(&dc));}m_bRecalcCategoryHeight = FALSE;}CKofMFCRibbonQuickAccessToolBar *pQAToolbar = (CKofMFCRibbonQuickAccessToolBar *)&m_QAToolbar;const CSize sizeAQToolbar = pQAToolbar->GetRegularSize(&dc);if (IsQuickAccessToolbarOnTop()){m_nCaptionHeight = max(m_nCaptionHeight, sizeAQToolbar.cy + (IsWindows7Look() ? 0 : (2 * nYMargin)));}//“快速存取工具列”的高度const int nQuickAceesToolbarHeight = IsQuickAccessToolbarOnTop() ? 0 : sizeAQToolbar.cy;//“分類”的高度const int nCategoryHeight = (m_dwHideFlags & AFX_RIBBONBAR_HIDE_ELEMENTS) ? 0 : m_nCategoryHeight;cy = nQuickAceesToolbarHeight + nCategoryHeight + max( m_nCaptionHeight + m_nTabsHeight, m_sizeMainButton.cy + nYMargin);}if (afxGlobalData.DwmIsCompositionEnabled()){if (GetParent()->IsZoomed() && m_bReplaceFrameCaption){cy += ::GetSystemMetrics(SM_CYSIZEFRAME) - 2;}}dc.SelectObject(pOldFont);return CSize(32767, cy);}

在MainFrm.h檔案裡面修改如下：

#include "KofMFCRibbonBar.h"class CMainFrame : public CMDIFrameWndEx{//...protected: //CMFCRibbonBar m_wndRibbonBar;CKofMFCRibbonBar m_wndRibbonBar;}

這樣子，運行結果還是原樣，如所示：

現在試著改變高度，修改上面的代碼，改動82行為如下：

m_nCategoryHeight = max(m_nCategoryHeight, pCategory->GetMaxHeight(&dc) + 80);

改動98行為如下：

const int nCategoryHeight = (m_dwHideFlags & AFX_RIBBONBAR_HIDE_ELEMENTS) ? 0 : m_nCategoryHeight + 20;

重新編譯運行，效果如所示：