VS+Qt+Halcon——顯示圖片，實(shí)現(xiàn)鼠標(biāo)縮放、移動(dòng)圖片

#pragma once#include "qlabel.h"#include"QWheelEvent"#include<HalconCpp.h>using namespace HalconCpp;
class Mylabel :    public QLabel{    Q_OBJECT
public:    Mylabel(QWidget* parent = Q_NULLPTR);    ~Mylabel();    //設(shè)置Halcon圖像和Halcon窗口句柄，用戶響應(yīng)鼠標(biāo)事件后實(shí)時(shí)更新圖像    void setHalconWnd(HObject img, HTuple hHalconID, QLabel* label);    //鼠標(biāo)滾輪縮放事件    void wheelEvent(QWheelEvent* ev);    //鼠標(biāo)按下事件    void mousePressEvent(QMouseEvent* ev);    //鼠標(biāo)釋放事件    void mouseReleaseEvent(QMouseEvent* ev);    //鼠標(biāo)移動(dòng)事件    void mouseMoveEvent(QMouseEvent* ev);public:    HTuple m_labelID;            //Qt標(biāo)簽句柄    HTuple m_hHalconID;            //Halcon窗口句柄    HObject m_currentImg;        //當(dāng)前的圖像    //主界面顯示坐標(biāo)的標(biāo)簽    QLabel* m_label;    //鼠標(biāo)按下的位置     HTuple m_tMouseDownRow;    HTuple m_tMouseDownCol;    bool m_bIsMove;                //是否移動(dòng)圖像標(biāo)識(shí)};

#include "Mylabel.h"//定義單步放大倍率#define ZOOMRATIO 2.0
Mylabel::Mylabel(QWidget* parent)    : QLabel(parent){    m_bIsMove = false;    this->setMouseTracking(true);    }Mylabel::~Mylabel(){
}
//設(shè)置Halcon圖像和Halcon窗口句柄，用戶響應(yīng)鼠標(biāo)事件后實(shí)時(shí)更新圖像void Mylabel::setHalconWnd(HObject img, HTuple hHalconID, QLabel* label){    m_hHalconID = hHalconID;    m_currentImg = img;    m_label = label;}
//鼠標(biāo)滾輪縮放事件，用于縮放圖像void Mylabel::wheelEvent(QWheelEvent* ev){    double Zoom;   //放大或縮小倍率    HTuple  mouseRow, mouseCol, Button;    HTuple startRowBf, startColBf, endRowBf, endColBf, Ht, Wt, startRowAft, startColAft, endRowAft, endColAft;    //滾輪前滑，放大    if (ev->delta()>0)    {        Zoom = ZOOMRATIO;    }    else//否則縮小    {        Zoom = 1 / ZOOMRATIO;    }    //獲取光標(biāo)在原圖上的位置，注意是原圖坐標(biāo)，不是Label下的坐標(biāo)    HTuple  hv_Exception, hv_ErrMsg;     try     {         GetMposition(m_hHalconID, &mouseRow, &mouseCol, &Button);
     }     catch (HException& HDevExpDefaultException)     {         return;     }     //獲取原圖顯示的部分，注意也是原圖坐標(biāo)     GetPart(m_hHalconID, &startRowBf, &startColBf, &endRowBf, &endColBf);     //縮放前顯示的圖像寬高     Ht = endRowBf - startRowBf;     Wt = endColBf - startColBf;     //普通版halcon能處理的圖像最大尺寸是32K*32K。如果無限縮小原圖像，導(dǎo)致顯示的圖像超出限制，則會(huì)造成程序崩潰     if (Ht*Wt<20000*20000||Zoom==ZOOMRATIO)     {         //計(jì)算縮放后的圖像區(qū)域         startRowAft = mouseRow - ((mouseRow - startRowBf) / Zoom);         startColAft = mouseCol - ((mouseCol - startColBf) / Zoom);         endRowAft = startRowAft + (Ht / Zoom);         endColAft = startColAft + (Wt / Zoom);         //如果放大過大，則返回         if (endRowAft - startRowAft < 2)         {             return;         }
         if (m_hHalconID != NULL)         {             //如果有圖像，則先清空?qǐng)D像             DetachBackgroundFromWindow(m_hHalconID);         }         SetPart(m_hHalconID, startRowAft, startColAft, endRowAft, endColAft);         AttachBackgroundToWindow(m_currentImg, m_hHalconID);         }}
void Mylabel::mousePressEvent(QMouseEvent* ev){    HTuple mouseRow, mouseCol, Button;    try    {        GetMposition(m_hHalconID, &mouseRow, &mouseCol, &Button);
    }    catch (HException)    {        return;    }    //鼠標(biāo)按下時(shí)的行列坐標(biāo)    m_tMouseDownRow = mouseRow;    m_tMouseDownCol = mouseCol;    m_bIsMove = true;}//鼠標(biāo)釋放事件void Mylabel::mouseReleaseEvent(QMouseEvent* ev){    m_bIsMove = false;}//鼠標(biāo)移動(dòng)事件void Mylabel::mouseMoveEvent(QMouseEvent* ev){    HTuple startRowBf, startColBf, endRowBf, endColBf, mouseRow, mouseCol, Button;    try    {        GetMposition(m_hHalconID, &mouseRow, &mouseCol, &Button);
    }    catch (HException)    {        return;    }    //鼠標(biāo)按下并移動(dòng)時(shí)，移動(dòng)圖像，否則只顯示坐標(biāo)    if (m_bIsMove)    {        //計(jì)算移動(dòng)值        double RowMove = mouseRow[0].D() - m_tMouseDownRow[0].D();        double ColMove = mouseCol[0].D() - m_tMouseDownCol[0].D();        //得到當(dāng)前的窗口坐標(biāo)        GetPart(m_hHalconID, &startRowBf, &startColBf, &endRowBf, &endColBf);        //移動(dòng)圖像        if (m_hHalconID!=NULL)        {            //如果有圖像，則先清空?qǐng)D像            DetachBackgroundFromWindow(m_hHalconID);        }        SetPart(m_hHalconID, startRowBf - RowMove, startColBf - ColMove, endRowBf - RowMove, endColBf - ColMove);        AttachBackgroundToWindow(m_currentImg, m_hHalconID);    }    //獲取灰度值    HTuple pointGray;    try    {        GetGrayval(m_currentImg, mouseRow, mouseCol, &pointGray);    }    catch (HException)    {        m_label->setText(QString::fromLocal8Bit("X坐標(biāo)：-    Y坐標(biāo)：-    灰度值：-"));
        return;    }    //設(shè)置坐標(biāo)    m_label->setText(QString::fromLocal8Bit("X坐標(biāo)：%1    Y坐標(biāo)：%2    灰度值：%3").arg(mouseCol[0].D()).arg(mouseRow[0].D()).arg(pointGray[0].D()));}

#pragma once
#include <QtWidgets/QWidget>#include "ui_BrowsePic.h"#include<HalconCpp.h>#include"qtoolbar.h"using namespace HalconCpp;#pragma execution_character_set("utf-8");
class BrowsePic : public QWidget{    Q_OBJECT
public:    BrowsePic(QWidget *parent = Q_NULLPTR);    ~BrowsePic();    //初始化    void init();
    //顯示圖像    void showImg();    int currentIndex;    //顯示圖像的控件id    HTuple m_hLabelID;            //QLabel控件句柄    HTuple m_hHalconID;            //Halcon顯示窗口句柄
    //原始圖像的尺寸    HTuple m_imgWidth, m_imgHeight;
    //圖片路徑列表    HTuple m_imgFiles;
    //當(dāng)前圖像    HObject m_hCurrentImg;    //縮放后的圖像    HObject m_hResizedImg;    //縮放系數(shù)    HTuple m_hvScaledRate;    //縮放后圖像的大小    HTuple m_scaledHeight, m_scaledWidth;    QToolBar* m_toolBar;public slots:
    //打開圖片    void on_btn_openPic_clicked();
    //瀏覽前一張    void on_btn_prePic_clicked();
    //瀏覽后一張    void on_btn_nextPic_clicked();
    //恢復(fù)圖片    void on_btn_resetPic_clicked();private:    Ui::BrowsePicClass ui;};

#include "browsepic.h"#include"Mylabel.h"#include <QFileDialog>#include <QFileInfo>BrowsePic::BrowsePic(QWidget *parent)    : QWidget(parent){    ui.setupUi(this);
    init();
}BrowsePic::~BrowsePic(){
}
void BrowsePic::init(){    //設(shè)置halcon的文件路徑為utf8，解決中文亂碼    SetSystem("filename_encoding", "utf8");    //生成空?qǐng)D像    GenEmptyObj(&m_hCurrentImg);    m_hHalconID = NULL;    m_hLabelID = (Hlong)ui.label->winId();    currentIndex = -1;}//顯示圖像void BrowsePic::showImg(){    if (m_hHalconID!=NULL)    {        //如果有圖像，則先清空?qǐng)D像        DetachBackgroundFromWindow(m_hHalconID);            }    else    {        //打開窗口        OpenWindow(0, 0, ui.label->width(), ui.label->height(), m_hLabelID, "visible", "", &m_hHalconID);    }    ui.label-> setHalconWnd(m_hCurrentImg, m_hHalconID, ui.label_status);
    //獲取圖像大小    GetImageSize(m_hCurrentImg, &m_imgWidth, &m_imgHeight);    //獲取縮放系數(shù)    TupleMin2(1.0 * ui.label->width() / m_imgWidth, 1.0 * ui.label->height() / m_imgHeight, &m_hvScaledRate);    //縮放圖像    ZoomImageFactor(m_hCurrentImg, &m_hResizedImg, m_hvScaledRate, m_hvScaledRate, "constant");    //獲取縮放后的大小    GetImageSize(m_hResizedImg, &m_scaledWidth, &m_scaledHeight);    //打開窗口    if (1.0 * ui.label->width() / m_imgWidth < 1.0 * ui.label->height() / m_imgHeight)    {        SetWindowExtents(m_hHalconID, ui.label->height() / 2.0 - m_scaledHeight / 2.0, 0, ui.label->width(), m_scaledHeight);    }    else    {        SetWindowExtents(m_hHalconID, 0, ui.label->width() / 2.0 - m_scaledWidth / 2.0, m_scaledWidth, ui.label->height());
    }    SetPart(m_hHalconID, 0, 0, m_imgHeight - 1, m_imgWidth - 1);    AttachBackgroundToWindow(m_hCurrentImg, m_hHalconID);}
//打開圖片void BrowsePic::on_btn_openPic_clicked(){    QString path = QFileDialog::getOpenFileName(this, "加載圖像", "./", "圖像文件(*.bmp *.png *.jpg)");    QFileInfo fileInfo(path);    QString dir = fileInfo.path();
    if (!path.isEmpty())    {        ListFiles(dir.toStdString().c_str(), "files", &m_imgFiles);
        TupleRegexpSelect(m_imgFiles, HTuple("\\.bmp|png|jpg").Append("ignore_case"), &m_imgFiles);

        for (int i = 0; i < m_imgFiles.Length(); i++)        {
            QString currentPath = m_imgFiles[i];            currentPath.replace("\\", "/");
            if (currentPath == path)            {                currentIndex = i;                ReadImage(&m_hCurrentImg, m_imgFiles[i]);                showImg();            }
        }    }
}
//瀏覽前一張void BrowsePic::on_btn_prePic_clicked(){    if (currentIndex > 0)    {        currentIndex--;        ReadImage(&m_hCurrentImg, m_imgFiles[currentIndex]);        showImg();
    }}//瀏覽后一張void BrowsePic::on_btn_nextPic_clicked(){    if (currentIndex >= 0 && currentIndex < m_imgFiles.Length() - 1)    {        currentIndex++;        ReadImage(&m_hCurrentImg, m_imgFiles[currentIndex]);        showImg();    }}//恢復(fù)圖片void BrowsePic::on_btn_resetPic_clicked(){    showImg();}