QT - MAC下QTableWidget的Bug

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bug描述：

在MAC系统下，QTableWidget的实例在setCellWidget()显示时，如果行数超过546，那么从547行起，单元格里的组件将显示不出来了。

系统环境：

MAC OS X 10.5 or MAC OS X 10.6

qt 4.6.2

关于QTableWidget还有一点值得提的是：

使用insertRow(int);插入行的方法速度非常慢，如果事先知道需要插入的行数，那么最好用setRowCount(int);速度快很多倍

下面写了一个实例程序来展示该bug，4个文件：define.h，mainwindow.h，mainwindow.cpp，main.cpp

define.h代码

/** * @brief Test the bug on MAC OS X (Current QT version is 4.6.2) * Bug description: on MAC OS X, the QTableWidget instance's cell widget disappeared begin at row 547 * @file define.h * @date 2010/12/21 22:33 * @author Wison Xu */#ifndef DEFINE_H#define DEFINE_H#include <QTime>#ifndef __TIME__#define __TIME__ qPrintable(QTime::currentTime().toString("hh:mm:ss.zzz"));#endif#endif // DEFINE_H

mainwindow.h代码：

mainwindow.cpp代码：

/** * @brief Test the bug on MAC OS X (Current QT version is 4.6.2) * Bug description: on MAC OS X, the QTableWidget instance's cell widget disappeared begin at row 547 * @file mainwindow.cpp * @class MainWindow * @date 2010/12/21 22:57 * @author Wison Xu */#include "mainwindow.h"#include "define.h"#include <QtGui/QMacStyle>MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , m_iMaxRow(BUG_BEGIN_ROW_ON_MAC) , m_bClear(true) , m_pTable(NULL) , m_pSpinBox(NULL) , m_pButton(NULL){ qDebug("%s: %s: at line:%d %s: constructor Entered ", __TIME__, __FILE__, __LINE__, __FUNCTION__); m_pTable = new QTableWidget(0, 1, this);#ifdef Q_OS_WIN32 m_pTable->setStyle(new QWindowsStyle());#endif#ifdef Q_OS_MAC m_pTable->setStyle(new QMacStyle());#endif m_pTable->resize(600, 300); m_pTable->move(50, 50); m_pSpinBox = new QSpinBox(this); m_pSpinBox->resize(100, 20); m_pSpinBox->move(100, 10); m_pSpinBox->setMaximum(65536); m_pSpinBox->setValue(m_iMaxRow); m_pButton = new QPushButton(BTN_ADD_TEXT, this); m_pButton->resize(100, 20); m_pButton->move(250, 10); QObject::connect(m_pButton, SIGNAL(clicked()), this, SLOT(onButtonClicked())); this->resize(700, 400); qDebug("%s: %s: at line:%d %s: constructor exited ", __TIME__, __FILE__, __LINE__, __FUNCTION__);}MainWindow::~MainWindow(){}/** * slot: onButtonClicked() * @brief slot: onButtonClicked() clear or add cells * @arg void */void MainWindow::onButtonClicked(){ qDebug("%s: %s: at line:%d %s: Entered ", __TIME__, __FILE__, __LINE__, __FUNCTION__); m_bClear = !m_bClear; if (m_bClear) { m_pTable->clear(); m_pTable->setRowCount(0); m_pButton->setText(BTN_ADD_TEXT); qDebug("%s: %s: at line:%d %s: all cells cleared ", __TIME__, __FILE__, __LINE__, __FUNCTION__); return; } m_pButton->setText(BTN_CLEAR_TEXT); m_iMaxRow = m_pSpinBox->value(); m_pTable->setRowCount(m_iMaxRow); // has higher efficiency than insertRow() for (int row=0; row<m_iMaxRow; row++) {// m_pTable->insertRow(row); QCheckBox *item = new QCheckBox(); m_pTable->setCellWidget(row, 0, item); } qDebug("%s: %s: at line:%d %s: exited ", __TIME__, __FILE__, __LINE__, __FUNCTION__);}

main.cpp代码：

/** * @brief Test the bug on MAC OS X (Current QT version is 4.6.2) * Bug description: on MAC OS X, the QTableWidget instance's cell widget disappeared begin at row 547 * @file main.cpp * @date 2010/12/21 22:32 * @author Wison Xu */#include <QtGui/QApplication>#include "mainwindow.h"#include "define.h"int main(int argc, char *argv[]){ qDebug("%s: %s: at line:%d %s: Entered ", __TIME__, __FILE__, __LINE__, __FUNCTION__); QApplication a(argc, argv); MainWindow w; w.show(); int ret = a.exec(); qDebug("%s: %s: at line:%d %s: exited with code %d ", __TIME__, __FILE__, __LINE__, __FUNCTION__, ret); return ret;}