使用soui4实现一个打印排版软件（十一）二维码元素控件实现

二维码元素的移动、拉伸参考rect的实现，这里我们主要看看二维码的绘制部分代码

#pragma once
#include "CEleBase.h"

class CEleQRcode : public CEleBase
{
	DEF_SOBJECT(SWindow, L"ele_qrcode")
public:
	CEleQRcode();
	~CEleQRcode();
public:
	void OnPaint(IRenderTarget* pRT);
protected:
	LRESULT OnCreate(LPVOID);

	void OnLButtonDown(UINT nFlags, SOUI::CPoint point);
	void OnLButtonUp(UINT nFlags, SOUI::CPoint point);
	void OnMouseMove(UINT nFlags, SOUI::CPoint point);
	void OnLButtonDblClk(UINT nFlags, SOUI::CPoint point);
	void OnRButtonUp(UINT nFlags, CPoint point);

protected:
	SOUI_MSG_MAP_BEGIN()
		MSG_WM_CREATE(OnCreate)
		MSG_WM_PAINT_EX(OnPaint)

		MSG_WM_LBUTTONDOWN(OnLButtonDown)
		MSG_WM_LBUTTONUP(OnLButtonUp)
		MSG_WM_LBUTTONDBLCLK(OnLButtonDblClk)
		MSG_WM_RBUTTONUP(OnRButtonUp)
		MSG_WM_MOUSEMOVE(OnMouseMove)

		SOUI_MSG_MAP_END()

private:
	CPoint  m_ptDown;
	EcPosType m_curEcPosType;

};

#include "stdafx.h"
#include "CEleQRcode.h"


CEleQRcode::CEleQRcode()
{
	//
}

CEleQRcode::~CEleQRcode()
{
	//
}

void CEleQRcode::OnPaint(IRenderTarget* pRT)
{
	SetMsgHandled(FALSE);
	pRT->SetAntiAlias(TRUE);
	CRect rcWindow = GetWindowRect();
	//QRCode
	SStringW sstrContent = L"12359ABCDE";
	std::string strContent = S_CW2A(sstrContent);
	struct zint_symbol* symbol;
	symbol = ZBarcode_Create();
	symbol->symbology = BARCODE_QRCODE;
	symbol->input_mode = DATA_MODE; //编码格式

	//symbol->option_1;  //设置QRCode的EccLevel
	//symbol->option_2;  //设置QRCode的Version
	//symbol->option_3;  //设置QRCode的掩码

	int nRet = ZBarcode_Encode_and_Buffer_Vector(symbol, (unsigned char*)strContent.c_str(), strContent.size(), 0);
	if (nRet == 0)
	{
		ZBarcode_Print(symbol, 0);
		std::vector<CRect> vecRects;
		if (symbol->vector)
		{
			struct zint_vector_rect* rect = symbol->vector->rectangles;
			while (rect)
			{
				CRect rcTmp;
				rcTmp.left = rect->x;
				rcTmp.top = rect->y;
				rcTmp.right = rcTmp.left + rect->width;
				rcTmp.bottom = rcTmp.top + rect->height;
				vecRects.push_back(rcTmp);
				rect = rect->next;
			}
		}

		double dDrawXUint = (double)rcWindow.Width() / symbol->width;
		double dDrawYUint = (double)rcWindow.Height() / symbol->rows;
		double dXUint = (double)symbol->bitmap_width / symbol->width;
		double dYUint = (double)symbol->bitmap_height / symbol->rows;
		std::vector<CRect> vecDrawRects;  
		for (int i = 0; i < vecRects.size(); i++)
		{
			CRect rcTmp(vecRects[i]);
			rcTmp.left = (rcTmp.left / dXUint * dDrawXUint);
			rcTmp.right = (rcTmp.right / dXUint * dDrawXUint);
			rcTmp.top = (rcTmp.top / dYUint * dDrawYUint);
			rcTmp.bottom = (rcTmp.bottom / dYUint * dDrawYUint);
			rcTmp.InflateRect(0, 1, 0, 1);
			vecDrawRects.push_back(rcTmp);
		}
		CAutoRefPtr<IPath> path;
		GETRENDERFACTORY->CreatePath(&path);
		for (int i = 0; i < vecDrawRects.size(); i++)
		{
			CRect rcRect;
			rcRect.left += vecDrawRects[i].left + rcWindow.left;
			rcRect.top += vecDrawRects[i].top + rcWindow.top;
			rcRect.right = rcRect.left + vecDrawRects[i].Width();
			rcRect.bottom = rcRect.top + vecDrawRects[i].Height();
			path->addRect(rcRect);
		}

		COLORREF clrFrgnd = GETCOLOR(L"RGB(0,0,0)");
		CAutoRefPtr<IBrush> brush, oldbrush;
		pRT->CreateSolidColorBrush(clrFrgnd, &brush);

		pRT->SelectObject(brush, (IRenderObj**)&oldbrush);
		pRT->FillPath(path);
		pRT->SelectObject(oldbrush, NULL);
	}
}

LRESULT CEleQRcode::OnCreate(LPVOID)
{
	SetMsgHandled(FALSE);
	//生成元素ID
	std::string strUUID = CGlobalUnits::GetInstance()->GenerateUUID();
	m_strUUID = strUUID;

	return __super::OnCreate(NULL);
}

void CEleQRcode::OnLButtonDown(UINT nFlags, SOUI::CPoint point)
{
	SetMsgHandled(FALSE);
	SetCapture();
	//...
}

void CEleQRcode::OnLButtonUp(UINT nFlags, SOUI::CPoint point)
{
	SetMsgHandled(FALSE);
	ReleaseCapture();
	//...
}

void CEleQRcode::OnMouseMove(UINT nFlags, SOUI::CPoint point)
{
	SetMsgHandled(FALSE);
	//...
}

void CEleQRcode::OnLButtonDblClk(UINT nFlags, SOUI::CPoint point)
{
	SetMsgHandled(FALSE);
}

void CEleQRcode::OnRButtonUp(UINT nFlags, CPoint point)
{
	SetMsgHandled(FALSE);
}

控件使用：
先注册，再在容器中创建元素

m_theApp->RegisterWindowClass<CEleQRcode>();

CEleQRcode* pEle = (CEleQRcode*)SApplication::getSingleton().CreateWindowByName(L"ele_qrcode");
SASSERT(pEle);
SApplication::getSingleton().SetSwndDefAttr(pEle);
this->InsertChild(pEle);
pEle->SSendMessage(WM_CREATE);
CPoint ptReal(point);
ptReal.x -= rcContainer.left;
ptReal.y -= rcContainer.top;

SStringT sstrRectPos;
sstrRectPos.Format(_T("%d,%d,@%d,@%d"), ptReal.x, ptReal.y, 100, 100);
pEle->SetAttribute(L"pos", sstrRectPos);

CPoint ptRB(ptReal.x + 100, ptReal.y + 100);
pEle->m_ptLT = ptReal;
pEle->m_ptRB = ptRB;

以上就是二维码控件的实现以及使用，此处只实现了QRCODE码，其他的诸如DATAMATRIX、PDF417等码制可参考二维码的实现方式实现。
效果如下：