JuniorHighClient/HJHomework/BaseComboBox.cpp

// BaseComboBox.cpp : 实现文件
//

#include "stdafx.h"
#include "HJHomework.h"
#include "BaseComboBox.h"


// CBaseComboBox

IMPLEMENT_DYNAMIC(CBaseComboBox, CComboBox)

CBaseComboBox::CBaseComboBox()
{
	m_dwStyle = WS_CHILD | WS_VSCROLL | CBS_DROPDOWNLIST | CBS_OWNERDRAWVARIABLE | CBS_HASSTRINGS | CB_SETITEMHEIGHT;
	m_font.CreatePointFont(80,L"微软雅黑");
	//m_fontmin.CreatePointFont(80,L"微软雅黑");
}

CBaseComboBox::~CBaseComboBox()
{
	m_font.DeleteObject();
}


BEGIN_MESSAGE_MAP(CBaseComboBox, CComboBox)
	ON_CONTROL_REFLECT(CBN_SELCHANGE, &CBaseComboBox::OnCbnSelchange)
	ON_WM_CREATE()
END_MESSAGE_MAP()



// CBaseComboBox 消息处理程序




BOOL CBaseComboBox::Create(CWnd* pParentWnd, UINT nID, const RECT& rect)
{
	// TODO: 在此添加专用代码和/或调用基类
	return CComboBox::Create(m_dwStyle, rect, pParentWnd, nID);
}


void CBaseComboBox::MeasureItem(LPMEASUREITEMSTRUCT lpmis)
{

	// TODO:  添加您的代码以确定指定项的大小

	lpmis->itemHeight = 31;
}


void CBaseComboBox::DrawItem(LPDRAWITEMSTRUCT lpdis)
{

	// TODO:  添加您的代码以绘制指定项

	//	获取绘画环境
	CDC* pDC = CDC::FromHandle(lpdis->hDC);
	COLORREF fontColor, backColor;
	fontColor = RGB(50,50,50);

	//	如果该项被选中,则绘画选中的背景
	if ((lpdis->itemState & ODS_SELECTED) &&                         
		(lpdis->itemAction & (ODA_SELECT | ODA_DRAWENTIRE)))
	{
		backColor = GetSysColor(COLOR_HIGHLIGHT);
		fontColor = RGB(255,255,255);
		pDC->FillRect(&lpdis->rcItem, &CBrush(backColor));
	}

	//	如何该项没有被选中,则绘画一个白背景
	if (!(lpdis->itemState & ODS_SELECTED) &&
		(lpdis->itemAction & ODA_SELECT))
	{
		backColor = RGB(255, 255, 255);
		pDC->FillRect(&lpdis->rcItem, &CBrush(backColor));
	}

	CRect rcItem(lpdis->rcItem.left,lpdis->rcItem.top,lpdis->rcItem.right,lpdis->rcItem.bottom);
	rcItem.left += 5;
	rcItem.right -= 5;

	//	获取当前数据项的字符串
	CString lpszText;
	if((int)(lpdis->itemID) >= 0)
		GetLBText(lpdis->itemID, lpszText);

	pDC->SelectObject(m_font);
	pDC->SetBkMode(TRANSPARENT);
	pDC->SetTextColor(fontColor);
	CSize sz = pDC->GetTextExtent(lpszText);
    if(sz.cx > rcItem.Width())  // 多行
	{
        pDC->DrawText(lpszText,rcItem,DT_LEFT|DT_WORDBREAK);
	}
    else  // 单行
	{
        pDC->DrawText(lpszText,rcItem,DT_SINGLELINE|DT_VCENTER|DT_LEFT);
	}
	//pDC->DrawText(lpszText,rcItem,DT_LEFT|DT_VCENTER|DT_SINGLELINE|DT_END_ELLIPSIS);
}


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

	CComboBox::PreSubclassWindow();
}


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

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


void CBaseComboBox::OnCbnSelchange()
{
	// TODO: 在此添加控件通知处理程序代码
	GetParent()->PostMessage(WM_COMBOBOX_SELCHANGE,0,0);
}


int CBaseComboBox::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CComboBox::OnCreate(lpCreateStruct) == -1)
		return -1;

	// TODO:  在此添加您专用的创建代码

	SetMinVisibleItems(5);

	return 0;
}