如何在DuiLib中绘制用户数据
一、如何在DuiLib中绘制用户数据
在DuiLib中有时需要在窗口中绘制图形或图像，如画相关的曲线或OpenCV处理图像的Mat数据，此时DuiLib就没有直接的函数可对界面进行操作，本文描述了一种基于Win窗口的折中方法。
1、定义CWndUI类，使其能够加入到DuiLib中
class CWndUI: public CControlUI
{
public:
CWndUI(): m_hWnd(NULL){}
virtual void SetVisible(bool bVisible = true)
{
__super::SetVisible(bVisible);
::ShowWindow(m_hWnd, bVisible);
}
virtual void SetInternVisible(bool bVisible = true)
{
__super::SetInternVisible(bVisible);
::ShowWindow(m_hWnd, bVisible);
}
virtual void SetPos(RECT rc)
{
__super::SetPos(rc);
::SetWindowPos(m_hWnd, NULL, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, SWP_NOZORDER | SWP_NOACTIVATE);
}
BOOL Attach(HWND hWndNew)
{
if (! ::IsWindow(hWndNew))
{
return FALSE;
}
m_hWnd = hWndNew;
return TRUE;
}
HWND Detach()
{
HWND hWnd = m_hWnd;
m_hWnd = NULL;
return hWnd;
}
HWND GetHWND()
{
return m_hWnd;
}
protected:
HWND m_hWnd;
};
2、定义并注册窗口和窗口处理函数
ATOM MyRegisterWnd(TCHAR szClsName, WNDPROC WndProc)
{WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = GetModuleHandle(NULL);
wcex.hIcon = NULL;// LoadIcon(hInstance, MAKEINTRESOURCE(IDI_TEST));
wcex.hCursor = NULL;//LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = GetStockBrush(LTGRAY_BRUSH); //(HBRUSH)(COLOR_WINDOW + 1);
wcex.lpszMenuName = NULL;// MAKEINTRESOURCE(IDC_TEST);
wcex.lpszClassName = szClsName;
wcex.hIconSm = NULL;// LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassEx(&wcex);
}
窗口处理函数为：
LRESULT CALLBACK CallbackImageCalibration(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
// int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc; HBRUSH hRedBrush;
static int cxClient, cyClient;
RECT rect;
HBRUSH hbrush;
switch (message)
{
case WM_SIZE:
cxClient = LOWORD(lParam);
cyClient = HIWORD(lParam);
::PostMessage(hWnd, WM_PAINT, NULL, NULL);
return 0;
case WM_ERASEBKGND:
hdc = GetDC(hWnd);//要十分注意局部变量的使用，假如在这里没有获取dc，那么就会擦除失败。
hbrush = CreateSolidBrush(RGB(0, 0, 0));//新建画刷
GetClientRect(hWnd, &rect);
FillRect(hdc, &rect, hbrush);
ReleaseDC(hWnd, hdc);
return TRUE;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
m_fc.DrawriginImage(hWnd);// m_fc为鱼眼图像校正的类
EndPaint(hWnd, &ps);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
在主程序中注册窗口
TCHAR szClsName[256] = _T(“#32775”);
MyRegisterWnd(szClsName, CallbackImageCalibration);
3、定义DuiLib界面XML文件中的要素并创建
创建名称为Wnd1的窗口
CControlUI CFIPFrameWnd::CreateControl(LPCTSTR pstrClassName)
{
if (_tcsicmp(pstrClassName, _T(“Wnd1”)) == 0)
{
CWndUI *pUI = new CWndUI;
m_hwndImageCalibration = CreateWindow(_T(“#32775”), _T(“WndImageCalibration”), WS_VISIBLE | WS_CHILD, 0, 0, 0, 0, m_PaintManager.GetPaintWindow(), (HMENU)0, NULL, NULL);
pUI->Attach(m_hwndImageCalibration);
pUI->SetVisible(true);
::ShowWindow(m_hwndImageCalibration, true);
::UpdateWindow(m_hwndImageCalibration);
return pUI;
}
Return pUI;
}
4、重新绘制窗口
这里展示的是一段鱼眼图像校正的函数。
CControlUI pbtnWnd = m_PaintManager.FindControl(_T(“wndImageCalibration”));
pbtnWnd->SetVisible(true);
//按照DuiLib的模式获取控件的实体类
CListUI pListUI = static_cast(m_PaintManager.FindControl(_T(“imageCalibrationlist”)));
int nSel = pListUI->GetCurSel();//获得左边的
m_fc.fix_data = NULL;// m_fc为鱼眼图像校正的类
if (nSel >= 0)
{
string_t filename = m_imageCalibrationList.at(nSel);
Mat mat = imread(filename);
CComboBoxUI* pComboboxUI = static_cast(m_PaintManager.FindControl(_T(“calibrationMethodlist”)));
int nMethod = pComboboxUI->GetCurSel();//获得校正方法，经度、双精度、经纬、柱面等
m_fc.Init(mat.cols, mat.rows, CalibrationType(nMethod));
m_fc.org_mat = mat.clone();
float time = m_fc.Calibration();//开始校正鱼眼图像
CLabelUI pLabelUI = static_cast(m_PaintManager.FindControl(_T(“ImageCalibrationInfo”)));
CDuiString strTmp;
strTmp.Format(_T(“图像校正时间：%f秒”), time);
pLabelUI->SetText(strTmp);
RECT r;
::GetWindowRect(m_hwndImageCalibration, &r);
::InvalidateRect(m_hwndImageCalibration,&r,true);//重新绘制
}
其中重绘的函数是在鱼眼校正的类中，m_fc. DrawriginImage函数
void FisheyeCalibration::DrawriginImage(HWND hwnd)
{
if (fix_mat.data)
{
WinShowMatImage(fix_mat, hwnd);
}
}
void FisheyeCalibration::WinShowMatImage(const cv::Mat& img, HWND hwnd)
{
if (!::IsWindow(hwnd)) return;
HDC hdc = ::GetWindowDC(hwnd);
RECT rect;
GetWindowRect(hwnd, &rect);
RECT destRect;
destRect.left = 0; destRect.top = 0;
destRect.right = rect.right - rect.left;
destRect.bottom = rect.bottom - rect.top;
//判断长和宽
if ( img.cols<(rect.right - rect.left) && img.rows<(rect.bottom - rect.top))
{
int tmp1 = ((rect.right - rect.left) - img.cols) / 2;
int tmp2 = ((rect.bottom - rect.top) - img.rows) / 2;
destRect.left = tmp1; destRect.right = tmp1 + img.cols;
destRect.top = tmp2; destRect.bottom = tmp2 + img.rows;
}
else
{
if (rect.bottom == rect.top) return;
float ratio1 = (float)(rect.right - rect.left) / (float)(rect.bottom - rect.top);
float ratio2 = (float)img.cols / (float)img.rows;
if (ratio1 > ratio2)
{
int w = ratio2(rect.bottom - rect.top);
int h = rect.bottom - rect.top;// ratio2*img.rows;
destRect.left = (rect.right - rect.left - w) / 2; destRect.right = (rect.right - rect.left - w) / 2 + w;
destRect.top = 0; destRect.bottom = h;
}
else
{
int w = rect.right - rect.left;// ratio1*img.cols;
int h = (rect.right - rect.left) / ratio2;// ratio1img.rows;
destRect.left = 0; destRect.right = w;
destRect.top = (rect.bottom - rect.top - h) / 2; destRect.bottom = (rect.bottom - rect.top - h) / 2 + h;
}
}
CvMat _img = img;
const CvArr arr = &_img;
CvMat stub;
CvMat* image = cvGetMat(arr, &stub);
// 构造BITMAPINFO头
SIZE size = { image->width, image->height };
int channels = 3;
BITMAPINFO binfo;
memset(&binfo, 0, sizeof(binfo));
BITMAPINFOHEADER& bmih = binfo.bmiHeader;
bmih.biSize = sizeof(BITMAPINFOHEADER);
bmih.biWidth = size.cx;
bmih.biHeight = abs(size.cy);
bmih.biPlanes = 1;
bmih.biBitCount = (unsigned short)(channels * 8);
bmih.biCompression = BI_RGB;
void* dst_ptr = 0;
HBITMAP hb = CreateDIBSection(hdc, &binfo, DIB_RGB_COLORS, &dst_ptr, 0, 0);
HDC windowdc = ::CreateCompatibleDC(hdc);
SelectObject(windowdc, hb);
CvMat dst;
cvInitMatHeader(&dst, size.cy, size.cx, CV_8UC3, dst_ptr, (size.cxchannels + 3)&-4);
int origin = ((IplImage)arr)->origin;
cvConvertImage(image, &dst, 1/origin == 0 ? CV_CVTIMG_FLIP : 0/);
// 显示
SetStretchBltMode(hdc, COLORONCOLOR);
StretchBlt(hdc, destRect.left+1, destRect.top+1, destRect.right - destRect.left, destRect.bottom - destRect.top, windowdc, 0, 0, size.cx, size.cy, SRCCOPY);
}
二、duilib.dll是什么东西
1、打开腾讯电脑管家找到工具箱；2、打开工具箱找到“电脑诊所”3、打开电脑诊所后在右上角的搜索内输入dll找到需要修复的文件后点击一键修复或者可以点击详情查看原因并点击立即修复
