DDD里面的错误是这样的，我觉得很奇怪。我原本没有定义statusBar，后来定义了并且加上
statusBar = new QStatusBar;
statusBar-> showMessage(tr("ready"));
还是出错。
Program received signal SIGSEGV, Segmentation fault.
0xf6d91d5e in QMainWindowLayout::statusBar (this=0x9036890) at widgets/qmainwindowlayout.cpp:219
/home/jing/programming/qt-x11-opensource-src-4.0.1/src/gui/widgets/qmainwindowlayout.cpp:219:5963:beg:0xf6d91d5e
此错误发生在点击菜单（比如&Help)然后选择下拉项（比如About）的时候
不知道有没有人发生过这样的情况呢？我开始是怀疑有没有东西没有被初始化，但是好像没有。
代码贴在下面了，希望能有高手指点一二。谢谢了。
- #ifndef _MAINWINDOW_H
- #define _MAINWINDOW_H
- #include <QMainWindow>
- #include <QMenu>
- #include <QGroupBox>
- #include <QPushButton>
- #include <string>
- #include "renderarea.h"
- #include "../core/export.h"
- using std::string;
- class MainWindow : public QMainWindow {
- Q_OBJECT
- public:
- MainWindow();
- private slots:
- void open();
- //bool save();
- void about();
- private:
- void createActions();
- void createMenus();
- void createShapeGroupBox();
- void createAttributeGroupBox();
-
- void loadFile(const QString &fullFileName);
- //bool saveFile(const QString &fileName);
- Scene *currentScene;
- RenderArea *renderarea;
- QMenuBar *menuBar;
- QStatusBar *statusBar;
- QMenu *fileMenu;
- QMenu *helpMenu;
- QAction *openAct;
- //QAction *saveAct;
- QAction *aboutAct;
-
- QGroupBox *shapeGroupBox;
- QGroupBox *attributeGroupBox;
-
- QPushButton *sphereButton;
- QPushButton *triangleButton;
- };
- #endif //_MAINWINDOW_H
- #include <QtGui>
- #include "mainwindow.h"
- MainWindow::MainWindow() {
- renderarea = new RenderArea;
- createActions();
- createMenus();
- createShapeGroupBox();
- createAttributeGroupBox();
-
- QGridLayout *mainLayout = new QGridLayout;
- delete layout(); //clean existing layout
- mainLayout->setMenuBar(menuBar);
- mainLayout->addWidget(renderarea,0,0,2,1);
- mainLayout->addWidget(shapeGroupBox,0,1);
- mainLayout->addWidget(attributeGroupBox,1,1);
- setLayout(mainLayout);
- setWindowTitle(tr("Fray - Frist Ray Tracer"));
- statusBar = new QStatusBar;
- statusBar-> showMessage(tr("ready"));
- }
- void MainWindow::open() {
- QString fileName =QFileDialog::getOpenFileName(this);
- if (!fileName.isEmpty()) {
- loadFile(fileName);
- }
- }
- /*
- bool MainWindow::save() {
- }
- */
- void MainWindow::about() {
- QMessageBox::about(this, tr("About Fray"), tr("Ray tracer"));
- }
- void MainWindow::createActions() {
- openAct = new QAction(QIcon("./images/open.png"), tr("&Open..."), this);
- openAct->setShortcut(tr("Ctrl+O"));
- openAct->setStatusTip(tr("Open an existing scene"));
- connect(openAct,SIGNAL(triggered()), this, SLOT(open()));
- aboutAct = new QAction(tr("About Fray"),this);
- aboutAct->setStatusTip(tr("About this application"));
- connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
- }
- void MainWindow::createMenus() {
- menuBar = new QMenuBar;
- fileMenu = menuBar->addMenu(tr("&File"));
- fileMenu->addAction(openAct);
- menuBar->addSeparator();
- helpMenu = menuBar->addMenu(tr("&Help"));
- helpMenu->addAction(aboutAct);
- }
- void MainWindow::createShapeGroupBox() {
- shapeGroupBox = new QGroupBox(tr("Primitive Shapes"));
- sphereButton = new QPushButton(tr("Sphere"));
- triangleButton = new QPushButton(tr("Triangle"));
-
- QGridLayout *layout = new QGridLayout;
- layout->addWidget(sphereButton,0,0);
- layout->addWidget(triangleButton,0,1);
- delete shapeGroupBox->layout();
- shapeGroupBox->setLayout(layout);
- shapeGroupBox->setFixedSize(200,100);
- }
- void MainWindow::createAttributeGroupBox() {
- attributeGroupBox = new QGroupBox(tr("Attributes"));
- }
- void MainWindow::loadFile(const QString &fullFileName) {
- currentScene = new Scene(fullFileName);
-
- QApplication::setOverrideCursor(Qt::WaitCursor);
- renderarea->loadScene(currentScene);
- QApplication::restoreOverrideCursor();
-
- //set current file
- }
[ 此贴被XChinux在2005-10-17 02:42重新编辑 ]
