ComboBoxProxy - lafe @ ウィキ

フラットコンボボックスを余所でも使うかもしれないので

// CComboBoxProxy.h
 
 
///////////////////////////////////////////////////////////////////////////////////////////
// CComboBoxProxy
 
class CComboBoxProxy
	: public CWindowImpl<CComboBoxProxy, CComboBox>
	, public CTrackMouseLeave<CComboBoxProxy>
{
private:
	enum			 { s_kcxyBorder = 2 };
	enum _ComboState { _comboNormal, _comboHot, _comboPressed };
 
	// Data members
	_ComboState	m_state;
	int			m_nDrawStyle;
	BOOL		m_bExistManifest;
 
public:
	// コンストラクタ
	CComboBoxProxy();
 
	bool	FlatComboBox_Install(HWND hWndCombo);
	void	FlatComboBox_UnInstall();
 
	void	SetDrawStyle(int nStyle);
 
public:
	// メッセージマップ
	BEGIN_MSG_MAP(CComboBoxProxy)
		MSG_WM_PAINT( OnPaint )
		CHAIN_MSG_MAP(CTrackMouseLeave<CComboBoxProxy>)
	END_MSG_MAP()
 
private:
	void	OnPaint(CDCHandle dc);
 
private:
	void	_DoComboPaint(CDCHandle dc);
 
	void	_DrawFlatThumb(CDCHandle &dc);
	void	_DrawFlatCombo(CDCHandle &dc, _ComboState state);
 
	CRect	_GetOriginalThumbRect();
	CRect	_GetFlatThumbInvalidateRect();
	CRect	_GetFlatComboInvalidateRect();
 
	void	_SetUseXPTheme(HWND hWnd, BOOL bUse);
 
};
 
 

// ComboBoxProxy.cpp
 
 
#include "ComboBoxProxy.h"

////////////////////////////////////////////////////////////////////////////////////////
// CComboBoxProxy
 
// コンストラクタ
CComboBoxProxy::CComboBoxProxy()
	: m_state(_comboNormal)
	, m_nDrawStyle(SKN_COMBO_STYLE_DEFAULT)
	, m_bExistManifest(TRUE)
{
}
 
bool CComboBoxProxy::FlatComboBox_Install(HWND hWndCombo)
{
	ATLVERIFY( SubclassWindow(hWndCombo) );
	return true;
}
 
 
void CComboBoxProxy::FlatComboBox_UnInstall()
{
	if ( IsWindow() ) {
		UnsubclassWindow();
	}
}
 
void CComboBoxProxy::SetDrawStyle(int nStyle)
{
	m_nDrawStyle = nStyle;
 
	if (nStyle == SKN_COMBO_STYLE_THEME && m_bExistManifest) {
		_SetUseXPTheme(m_hWnd, TRUE);
	} else {
		_SetUseXPTheme(m_hWnd, FALSE);
	}
}
 
 
/////////////////////////////////////////////////////////////////////////////////////
// メッセージマップ
 
void CComboBoxProxy::OnPaint(CDCHandle dc)
{
	if ( m_nDrawStyle == SKN_COMBO_STYLE_DEFAULT
	 || (m_nDrawStyle == SKN_COMBO_STYLE_THEME && !m_bExistManifest) ) {
		 // スタイルがデフォルトかテーマなのにmanifestファイルが存在しないとき
		 CRect	rc;
		 GetUpdateRect(&rc, FALSE);
 
		 ValidateRect(NULL);	// validate the whole
 
		 // invalidate only the internal rect
		 CRect	rcCombo  = _GetFlatComboInvalidateRect();
		 CRect	rcThumb  = _GetFlatThumbInvalidateRect();
 
		 CRect	rcUpdate = rc & rcCombo;
		 InvalidateRect(&rcUpdate, FALSE);
		 rcUpdate = rc & rcThumb;
		 InvalidateRect(&rcUpdate, FALSE);
 
		 // Update
		 LRESULT	lRet = DefWindowProc();
		 CClientDC	dc(m_hWnd);
		 _DoComboPaint(dc.m_hDC);
	} else {
		SetMsgHandled(FALSE);
	}
}
 
//
//////////////////////////////////////////////////////////////////////////////////////
 
// private:
 
void CComboBoxProxy::_DoComboPaint(CDCHandle dc)
{
	_DrawFlatCombo(dc, m_state);
	_DrawFlatThumb(dc);
}
 
 
void CComboBoxProxy::_DrawFlatThumb(CDCHandle &dc)
{
	CRect	rc = _GetOriginalThumbRect();
 
	dc.DrawEdge(rc, BDR_RAISEDINNER, BF_RECT);
 
	rc.DeflateRect(1, 1);
	COLORREF	clrBtnFace = ::GetSysColor(COLOR_BTNFACE);
	dc.Draw3dRect(rc, clrBtnFace, clrBtnFace);
}
 
void CComboBoxProxy::_DrawFlatCombo(CDCHandle &dc, _ComboState state)
{
	COLORREF	clrBtnFace = ::GetSysColor(COLOR_BTNFACE);
 
	CRect		rc;
	GetClientRect(&rc);
 
	dc.Draw3dRect(rc, clrBtnFace, clrBtnFace);
	rc.DeflateRect(1, 1);
 
	switch (state)
	{
	case _comboNormal:
		dc.DrawEdge(rc, BDR_SUNKENOUTER, BF_RECT);
		break;
 
	case _comboHot:
		dc.DrawEdge(rc, BDR_RAISEDINNER, BF_RECT);
		break;
 
	case _comboPressed:
		break;
	}
}
 
CRect CComboBoxProxy::_GetOriginalThumbRect()
{
	CRect	rc;
 
	GetClientRect(&rc);
	rc.right	-= s_kcxyBorder;
	rc.left		 = rc.right - ::GetSystemMetrics(SM_CXHTHUMB);
	rc.top		+= s_kcxyBorder;
	rc.bottom	-= s_kcxyBorder;
 
	return rc;
}
 
 
CRect CComboBoxProxy::_GetFlatThumbInvalidateRect()
{
	CRect	rc = _GetOriginalThumbRect();
 
	rc.DeflateRect(2, 2);
	return rc;
}
 
CRect CComboBoxProxy::_GetFlatComboInvalidateRect()
{
	CRect	rc;
 
	GetClientRect(&rc);
	rc.DeflateRect(2, 2);
	rc.right -= ::GetSystemMetrics(SM_CXHTHUMB);
	return rc;
}
 
void CComboBoxProxy::_SetUseXPTheme(HWND hWnd, BOOL bUse)
{
	if (bUse) {
		::SetWindowTheme( hWnd, L" ", L"COMBOBOX" );
	} else {
		::SetWindowTheme( hWnd, L" ", L" " );
	}
}