1 #include "mainwindow.h" 2 #include <QApplication> 3 #include <QtGui/QLabel> 4 #include <QtCore> 5  6 int main(int argc, char *argv[]) 7 { 8     QApplication app(argc, argv); 9 10         QTextCodec *codec=QTextCodec::codecForName("GBK");11         if(codec==NULL)12             codec=QTextCodec::codecForLocale();13 14         QTextCodec::setCodecForLocale(codec);15         QTextCodec::setCodecForTr(codec);16         QTextCodec::setCodecForCStrings(codec);17 18         QTranslator translator( 0 );19         translator.load( "qt_zh_CN.qm", "." );20         app.installTranslator( &translator );21 22         QFont font;23         font.setFamily(QString::fromUtf8("\345\256\213\344\275\223"));24         font.setPointSize(9);25         app.setFont(font);26 27         CImageDisplayDlg MainWindow;28         app.setActiveWindow(&MainWindow);29         MainWindow.show();30 31         QString myStylesheet = "QDialog,QMainWindow,QSplitter\32                                {background-color: qlineargradient(x1:0,y1:0,x2:0,y2:1,stop:0 rgb(193,219,255) stop:1 rgb(227,239,255));}33                                QMenuBar{background-color: rgb(193,219,255);}";34         app.setStyleSheet(myStylesheet);35 36         return app.exec();37 }

 1 /*************************************************************************** 2 * 3 * Time: 2012-05-28 4 * Project: 遥感图像显示Demo 5 * Purpose: 遥感图像显示Demo 6 * Author:  李民录 7 * Copyright (c) 2011, liminlu0314@163.com 8 * Describe:遥感图像显示Demo 9 *10 ****************************************************************************/11 #ifndef MAINWINDOW_H12 #define MAINWINDOW_H13 14 #include "ui_MainWindow.h"15 #include <string>16 using namespace std;17 18 class GDALDataset;19 20 QT_BEGIN_NAMESPACE21 class QCheckBox;22 class QComboBox;23 class QLabel;24 class QSpinBox;25 QT_END_NAMESPACE26 27 class CImageDisplayDlg :28     public QDialog,29     private Ui::ImageDisplayDlg30 {31     Q_OBJECT32 33 public:34     CImageDisplayDlg(QWidget* parent = 0);35     ~CImageDisplayDlg(void);36 37 private:38     bool CheckInputData(const char* pszRaster, const char* pszVector, QString& strMsg);39 40     private slots:41         void LoadInputRaster();42         void soltApply();43         void OnOK();44 45 private:46     bool ShowRasterFile();47     void ShowRaster();48 private:49     string m_strInputRaster;50     GDALDataset *m_pDataset;51     double m_dScale;52     int m_iMinx;53     int m_iMiny;54     int m_iMaxx;55     int m_iMaxy;56 };57 58 #endif /*MAINWINDOW_H*/

  1 /***************************************************************************  2 *  3 * Time: 2012-05-28  4 * Project: 遥感图像显示Demo  5 * Purpose: 遥感图像显示Demo  6 * Author:  李民录  7 * Copyright (c) 2011, liminlu0314@163.com  8 * Describe:遥感图像显示Demo  9 * 10 ****************************************************************************/ 11 #include "MainWindow.h" 12  13 #include <QFileDialog> 14 #include <QMessageBox> 15 #include <QSettings> 16  17 #include "gdal_priv.h" 18  19 CImageDisplayDlg::CImageDisplayDlg(QWidget* parent) 20 : QDialog( parent ) 21 { 22     setupUi(this); 23  24     QObject::connect(buttonBox, SIGNAL(accepted()), this, SLOT(OnOK())); 25     QObject::connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject())); 26     QObject::connect(pushButtonInput, SIGNAL(clicked()), this, SLOT(LoadInputRaster())); 27     QObject::connect(pushButtonApply, SIGNAL(clicked()), this, SLOT(soltApply())); 28  29     labelView->clear(); 30     m_pDataset = NULL; 31 } 32  33 CImageDisplayDlg::~CImageDisplayDlg(void) 34 { 35     if(m_pDataset != NULL) 36     { 37         GDALClose((GDALDatasetH) m_pDataset); 38         m_pDataset = NULL; 39     } 40 } 41  42 bool CImageDisplayDlg::ShowRasterFile() 43 { 44     GDALAllRegister(); 45     m_pDataset = (GDALDataset*)GDALOpen(m_strInputRaster.c_str(), GA_ReadOnly); 46     if (m_pDataset == NULL) 47     { 48         QMessageBox::information(this,tr("提示"),tr("指定的文件不能打开！")); 49         return false; 50     } 51     //设置投影坐标范围 52     int    dataWidth = m_pDataset->GetRasterXSize(); 53     int dataHeight = m_pDataset->GetRasterYSize(); 54  55     double padfTransform[6] = {0.0}; 56     m_pDataset->GetGeoTransform(padfTransform); 57  58     //设置行列号范围 59     spinStartCol->setRange(0, dataWidth-1); 60     spinStartRow->setRange(0, dataHeight-1); 61     spinEndCol->setRange(0, dataWidth-1); 62     spinEndRow->setRange(0, dataHeight-1); 63  64     spinStartCol->setValue(0); 65     spinStartRow->setValue(0); 66     spinEndCol->setValue(dataWidth-1); 67     spinEndRow->setValue(dataHeight-1); 68  69     ShowRaster(); 70     return true; 71 } 72  73 void CImageDisplayDlg::LoadInputRaster() 74 { 75     QFileDialog::Options options; 76     QString selectedFilter; 77     QString fileName = QFileDialog::getOpenFileName(this, 78         tr("打开原始图像"), 79         ".", 80         tr("所有文件(*.*);;Erdas Image (*.img);;PCIDSK (*.pix);;GTiff (*.tif *.tiff);;ENVI (*.*)"), 81         &selectedFilter, 82         options); 83  84     if (!fileName.isEmpty()) 85     { 86         if(m_pDataset != NULL) 87         { 88             GDALClose((GDALDatasetH) m_pDataset); 89             m_pDataset = NULL; 90         } 91  92         lineInput->setText(fileName); 93         m_strInputRaster = QFile::encodeName( fileName ).constData(); 94  95         if(!ShowRasterFile()) 96         { 97             lineInput->setText(""); 98             m_strInputRaster = ""; 99         }100     }101 }102 103 void CImageDisplayDlg::ShowRaster()104 {105     int iStartCol = spinStartCol->value();106     int iStartRow = spinStartRow->value();107 108     int dataWidth = spinEndCol->value() - iStartCol;109     int dataHeight = spinEndRow->value() - iStartRow;110     int    dataBands =  m_pDataset->GetRasterCount();111 112     int    band_list[3] = {1,2,3};113 114     m_dScale = dataHeight > dataWidth ? dataHeight : dataWidth;115     int iViewHeight = 541;116     m_dScale = iViewHeight/m_dScale;117 118     int iSize = GDALGetDataTypeSize(GDT_Byte) / 8;119     int iScaleWidth = static_cast<int>(dataWidth*m_dScale+0.5);120     int iScaleHeight = static_cast<int>(dataHeight*m_dScale+0.5);121 122     iScaleWidth = (iScaleWidth*8+31)/32*4;123 124     unsigned char* pBuffer = new unsigned char[iScaleWidth*iScaleHeight*dataBands];125     CPLErr err = m_pDataset->RasterIO(GF_Read, 0, 0, dataWidth, dataHeight, pBuffer, iScaleWidth, iScaleHeight,126         GDT_Byte, dataBands, band_list, iSize*dataBands, iSize*iScaleWidth*dataBands, iSize);127     unsigned char* pDataBuffer = NULL;128     if (dataBands >=3 )129     {130         pDataBuffer = pBuffer;131     }132     else133     {134         pDataBuffer = new unsigned char[iScaleWidth*iScaleHeight*3];135         for (int i=0; i<iScaleWidth*iScaleHeight*3; i++)136             pDataBuffer[i] = pBuffer[i/3];137 138         delete []pBuffer;139     }140 141     QImage QImg(pDataBuffer, iScaleWidth, iScaleHeight, QImage::Format_RGB888);142     QPixmap pixmap = QPixmap::fromImage(QImg);143     delete []pDataBuffer;144 145     labelView->setPixmap(pixmap);146 }147 148 void CImageDisplayDlg::OnOK()149 {150     accept();151 }152 153 void CImageDisplayDlg::soltApply()154 {155     ShowRaster();156 }