JuniorHighClient/HJHomework/ComboBoxExt.cpp

// ComboBoxExt.cpp : 实现文件
//

#include "stdafx.h"
#include "HJHomework.h"
#include "ComboBoxExt.h"
#include "CacheDC.h"

extern void LoadImageFromResID(int id, CImageEx*& pImage);

IMPLEMENT_DYNAMIC(CComboBoxExt, CWnd)

CComboBoxExt::CComboBoxExt()
{
	m_dwStyle = WS_CHILD | SS_NOTIFY;
	m_dwConfig = NULL;
	m_lpszIcon = L"res\\skin\\icon-drop.png";
	m_font.CreatePointFont(100,L"微软雅黑");
	m_lpszText = L"";
	m_bError = FALSE;
}

CComboBoxExt::~CComboBoxExt()
{
}


BEGIN_MESSAGE_MAP(CComboBoxExt, CWnd)
	ON_WM_PAINT()
	ON_WM_CREATE()
END_MESSAGE_MAP()



// CComboBoxExt 消息处理程序




BOOL CComboBoxExt::Create(
	CWnd* pParentWnd
	, UINT nID
	, CRect& rect
	, LPCTSTR lpszText/* = NULL*/
	, DWORD dwStyle/* = NULL*/
	, ENUM_COMBOBOX_TYPE combo_type/* = COMBOBOX_SELECT*/
	)
{
	// TODO: 在此添加专用代码和/或调用基类

	m_lpszDefault = lpszText;
	m_dwStyle |= dwStyle;
	m_combo_type = combo_type;

	return CWnd::Create(L"STATIC", NULL, m_dwStyle, rect, pParentWnd, nID);
}



BOOL CComboBoxExt::Create(
	CWnd* pParentWnd
	, UINT nID
	, CPoint& point
	, CSize& size
	, LPCTSTR lpszText/* = NULL*/
	, DWORD dwStyle/* = NULL*/
	, ENUM_COMBOBOX_TYPE combo_type/* = COMBOBOX_SELECT*/
	)
{
	// TODO: 在此添加专用代码和/或调用基类

	return Create(pParentWnd, nID, CRect(point.x, point.y, point.x + size.cx, point.y + size.cy), lpszText, dwStyle,combo_type);
}


void CComboBoxExt::PreSubclassWindow()
{
	// TODO: 在此添加专用代码和/或调用基类

	CWnd::PreSubclassWindow();
}

void SelectFolder(HWND hwnd, CString& lpszFolder)
{
	TCHAR szFolderPath[MAX_PATH];
	szFolderPath[0] = 0;
	BROWSEINFO	sInfo;
	::ZeroMemory(&sInfo, sizeof(BROWSEINFO));
	sInfo.pidlRoot = 0;
	sInfo.lpszTitle = _T("请选择一个文件夹");
	sInfo.ulFlags = BIF_DONTGOBELOWDOMAIN | BIF_RETURNONLYFSDIRS | BIF_NEWDIALOGSTYLE | BIF_EDITBOX;
	sInfo.lpfn = NULL;
	sInfo.hwndOwner = hwnd;
	LPITEMIDLIST  lpidlBrowse = ::SHBrowseForFolder(&sInfo);

	if (lpidlBrowse != NULL){
		if (::SHGetPathFromIDList(lpidlBrowse, szFolderPath)){
			lpszFolder = szFolderPath;
			lpszFolder.Replace('\\', '/');
		}
		::CoTaskMemFree(lpidlBrowse);
	}
}

LRESULT CComboBoxExt::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
	// TODO: 在此添加专用代码和/或调用基类

	switch(message)
	{
	case WM_LBUTTONDOWN:
	case WM_LBUTTONUP:
	case WM_LBUTTONDBLCLK:
	case WM_MOUSEMOVE:
		{
			CPoint point(GET_X_LPARAM(lParam),GET_Y_LPARAM(lParam));
			if(m_rcIconAction.PtInRect(point))
				::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_HAND));

			if(message == WM_LBUTTONDOWN)
			{
				switch(m_combo_type)
				{
				case COMBOBOX_FOLDER:
					SelectFolder(this->GetSafeHwnd(),m_lpszText);
					m_bError = m_lpszText.GetLength() < 1;
					InvalidateRect(m_rcText,FALSE);
					break;
				case COMBOBOX_SELECT:
					if(GetCount() > 0)
						ShowDropDown(!GetDroppedState());
					break;
				}
			};
		}
		return 0L;

	case WM_COMBOBOX_SELCHANGE:
		OnCbnSelchange();
		return 0L;
	}

	return CWnd::WindowProc(message, wParam, lParam);
}


void CComboBoxExt::OnPaint()
{
	CPaintDC dc(this);
	GetClientRect(m_rcClient);
	CCacheDC pCacheDC(&dc,m_rcClient);

	pCacheDC->FillSolidRect(m_rcClient,RGB(255,255,255));						//	画背景
	pCacheDC->FrameRect(m_rcClient,&CBrush(RGB(201,201,201)));					//	画边框

	//	绘制标准图标框和图标
	CPen pen(PS_SOLID, 1, RGB(201,201,201));									//	创建一个画笔
	CPen* pOldPen=pCacheDC->SelectObject(&pen);									//	保存原始的CPen.
	pCacheDC->MoveTo(m_rcIconAction.left - 1, m_rcClient.top);					//	移动到指定位置
	pCacheDC->LineTo(m_rcIconAction.left - 1, m_rcClient.bottom);				//	画直接到指定位置
	m_pIcon->DrawImage(pCacheDC,m_rcIcon.left,m_rcIcon.top, m_rcIcon.Width(),m_rcIcon.Height(),0, 0);

	//	画文本
	m_rcClient.left += 5;
	pCacheDC->SelectObject(m_font);
	pCacheDC->SetBkMode(TRANSPARENT);

	if(m_bError)
	{
		pCacheDC->SetTextColor(RGB(224,27,90));
		pCacheDC->DrawText(m_lpszDefault,m_rcText,DT_LEFT | DT_SINGLELINE | DT_VCENTER | DT_END_ELLIPSIS);
	}
	else
	{
		//pCacheDC->SetTextColor(RGB(150,150,150));
		pCacheDC->SetTextColor(RGB(51,51,51));
		if(m_lpszText.GetLength() < 1)
			pCacheDC->DrawText(m_lpszDefault,m_rcText,DT_LEFT | DT_SINGLELINE | DT_VCENTER | DT_END_ELLIPSIS);
		else
			pCacheDC->DrawText(m_lpszText,m_rcText,DT_LEFT | DT_SINGLELINE | DT_VCENTER | DT_END_ELLIPSIS);
	}

	this->OnPaint(pCacheDC);

}


int CComboBoxExt::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CWnd::OnCreate(lpCreateStruct) == -1)
		return -1;

	m_combobox.Create(this, 0x0010, CRect(0,0,lpCreateStruct->cx, lpCreateStruct->cy));

	if(m_combo_type == COMBOBOX_FOLDER)
		LoadImageFromResID(IDB_PNG_ICON_SELECT, m_pIcon);
	else
		LoadImageFromResID(IDB_PNG_ICON_DROP, m_pIcon);

	GetClientRect(m_rcClient);										//	获取控件大小
	//m_pIcon = new CImageEx(m_lpszIcon);						    //	加载图标
	UINT nIconHeight = m_pIcon->GetHeight();						//	图标高度
	UINT nIconWidth = m_pIcon->GetWidth();							//	图标高度
	UINT nIconMargins = (m_rcClient.Height() - nIconHeight) / 2;	//	边距大小

	//	设置图标位置
	m_rcIcon.SetRect(m_rcClient.right - nIconMargins - nIconHeight , nIconMargins , m_rcClient.right - nIconMargins, nIconMargins + nIconHeight);
	m_rcIconAction.CopyRect(m_rcIcon);
	m_rcIconAction.InflateRect(nIconMargins,nIconMargins,nIconMargins,nIconMargins);

	//	设置文本的位置
	m_rcText.SetRect(nIconMargins * 2, nIconMargins, m_rcIconAction.left - nIconMargins, m_rcClient.bottom - nIconMargins);

	// TODO:  在此添加您专用的创建代码
	if(!InitComboBox())
		return -1;

	return 0;
}


BOOL CComboBoxExt::InitComboBox()
{
	return TRUE;
}


void CComboBoxExt::OnCbnSelchange()
{
	if(m_combo_type != COMBOBOX_SELECT)
		return ;

	m_bError = FALSE;
	m_combobox.GetWindowText(m_lpszText);
	Invalidate(FALSE);	
	int nSel = GetCurSel();
	int nData = -1;
	if (nSel >=0 )
	{
		nData = m_combobox.GetItemData(nSel);
	}
	GetParent()->PostMessage(WM_COMBOBOX_SELCHANGE, nData, (LPARAM)GetSafeHwnd());
}


BOOL CComboBoxExt::GetValidate()
{
	if(m_combo_type == COMBOBOX_FOLDER)
		m_bError = m_lpszText.GetLength() < 1;
	else
		m_bError = GetCount() <= 0;
	
	Invalidate(FALSE);
	return !m_bError;
}


void CComboBoxExt::GetWindowText(CString& rString)
{
	rString = m_lpszText;
}


void CComboBoxExt::SetWindowText(CString rString)
{
	m_lpszText = rString;
}

void CComboBoxExt::ResetContent()
{
	if(m_combo_type != COMBOBOX_SELECT)
		return ;
	return m_combobox.ResetContent();
};


int CComboBoxExt::AddString(LPCTSTR lpszString)
{
	if(m_combo_type != COMBOBOX_SELECT)
		return -1;
	return m_combobox.AddString(lpszString);
};

void CComboBoxExt::Clear()
{
	m_combobox.Clear();
}

int CComboBoxExt::InsertString(int nIndex, LPCTSTR lpszString)
{
	if(m_combo_type != COMBOBOX_SELECT)
		return -1;
	return m_combobox.InsertString(nIndex,lpszString);
}


int CComboBoxExt::SetItemDataPtr(int nIndex, void* pData)
{
	if(m_combo_type != COMBOBOX_SELECT)
		return -1;
	return m_combobox.SetItemDataPtr(nIndex,pData);
};


void* CComboBoxExt::GetItemDataPtr(int nIndex) const
{
	if(m_combo_type != COMBOBOX_SELECT)
		return nullptr;
	return m_combobox.GetItemDataPtr(nIndex);
};

int CComboBoxExt::SetItemData(int nIndex, DWORD_PTR dwItemData)
{
	if(m_combo_type != COMBOBOX_SELECT)
		return -1;
	return m_combobox.SetItemData(nIndex,dwItemData);
}
DWORD_PTR CComboBoxExt::GetItemData(int nIndex)
{
	if(m_combo_type != COMBOBOX_SELECT)
		return -1;
	return m_combobox.GetItemData(nIndex);
}

int CComboBoxExt::GetCount() const
{
	if(m_combo_type != COMBOBOX_SELECT)
		return -1;
	return m_combobox.GetCount();
};


int CComboBoxExt::GetCurSel() const
{
	if(m_combo_type != COMBOBOX_SELECT)
		return -1;
	return m_combobox.GetCurSel();
};


int CComboBoxExt::SetCurSel(int nSelect)
{
	if(m_combo_type != COMBOBOX_SELECT)
		return -1;
	int index = m_combobox.SetCurSel(nSelect);
	m_combobox.GetWindowText(m_lpszText);
	InvalidateRect(m_rcText,FALSE);
	return index;
}


void CComboBoxExt::ShowDropDown(BOOL bShowIt/* = TRUE*/)
{
	if(m_combo_type != COMBOBOX_SELECT)
		return ;
	m_combobox.ShowDropDown(bShowIt);
}


BOOL CComboBoxExt::GetDroppedState() const
{
	if(m_combo_type != COMBOBOX_SELECT)
		return TRUE;
	return m_combobox.GetDroppedState();
}