我用编码方式在qt创建一个窗口,为什么除了窗口的标题显示正常外,其余地方窗口都没有显示?

我用编码方式在qt创建一个窗口,为什么除了窗口的标题显示正常外,其余地方窗口都没有显示?求指教!
代码:#ifndef CALENDER_H
#define CALENDER_H

#include
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QT_BEGIN_NAMESPACE
class QTextBrowser;
QT_END_NAMESPACE
class Calender : public QDialog
{
Q_OBJECT

public:
explicit Calender(QWidget *parent = 0);
~Calender();

QTextCharFormat getBoldFormat() const;

public slots:
void setFontSize(int size);
void setMonth(int month);
void setYear(QDate date);

private:
void insertCalendar();

int fontSize;
QDate selectedDate;
QTextBrowser *editor;
QWidget *centralWidget;
QLabel *dateLabel;
QComboBox *monthCombo;
QDateTimeEdit *yearEdit;
QLabel *fontSizeLabel;
QSpinBox *fontSizeSpinBox;
QHBoxLayout *controlsLayout;
QVBoxLayout *centralLayout;
QTextTable *table;
QTextFrame *frame;
QTextFrameFormat frameFormat;
QTextCharFormat format;
QTextCharFormat boldFormat;
QTextCharFormat highlightedFormat;
QTextTableCell cell;
QTextCursor cellCursor;
QVector<QTextLength> constraints;
QTextTableFormat tableFormat;
QTextCursor cursor;

};

#endif // CALENDER_H
#include "calender.h"
#include

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Calender::Calender(QWidget *parent)
:QDialog(parent)
{
selectedDate = QDate::currentDate();
fontSize = 10;

QWidget *centralWidget = new QWidget;

//! [0]

//! [1]
QLabel *dateLabel = new QLabel(tr("Date:"));
QComboBox *monthCombo = new QComboBox;

for (int month = 1; month <= 12; ++month)
    monthCombo->addItem(QDate::longMonthName(month));

QDateTimeEdit *yearEdit = new QDateTimeEdit;
yearEdit->setDisplayFormat("yyyy");
yearEdit->setDateRange(QDate(1753, 1, 1), QDate(8000, 1, 1));

//! [1]

monthCombo->setCurrentIndex(selectedDate.month() - 1);
yearEdit->setDate(selectedDate);

//! [2]
QLabel *fontSizeLabel = new QLabel(tr("Font size:"));
QSpinBox *fontSizeSpinBox = new QSpinBox;
fontSizeSpinBox->setRange(1, 64);

editor = new QTextBrowser;
insertCalendar();

//! [2]

//! [3]
connect(monthCombo, SIGNAL(activated(int)), this, SLOT(setMonth(int)));
connect(yearEdit, SIGNAL(dateChanged(QDate)), this, SLOT(setYear(QDate)));
connect(fontSizeSpinBox, SIGNAL(valueChanged(int)),
this, SLOT(setFontSize(int)));
//! [3]

fontSizeSpinBox->setValue(10);

//! [4]
QHBoxLayout *controlsLayout = new QHBoxLayout;
controlsLayout->addWidget(dateLabel);
controlsLayout->addWidget(monthCombo);
controlsLayout->addWidget(yearEdit);
controlsLayout->addSpacing(24);
controlsLayout->addWidget(fontSizeLabel);
controlsLayout->addWidget(fontSizeSpinBox);
controlsLayout->addStretch(1);

QVBoxLayout *centralLayout = new QVBoxLayout;
centralLayout->addLayout(controlsLayout);
centralLayout->addWidget(editor, 1);
centralWidget->setLayout(centralLayout);

//! [4]
}

//! [5]
void Calender:: insertCalendar()
{
editor->clear();
QTextCursor cursor = editor->textCursor();
cursor.beginEditBlock();

QDate date(selectedDate.year(), selectedDate.month(), 1);

//! [5]

//! [6]
QTextTableFormat tableFormat;
tableFormat.setAlignment(Qt::AlignHCenter);
tableFormat.setBackground(QColor("#e0e0e0"));
tableFormat.setCellPadding(2);
tableFormat.setCellSpacing(4);
//! [6] //! [7]
QVector constraints;
constraints << QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14);
tableFormat.setColumnWidthConstraints(constraints);
//! [7]

//! [8]
QTextTable *table = cursor.insertTable(1, 7, tableFormat);
//! [8]

//! [9]
QTextFrame *frame = cursor.currentFrame();
QTextFrameFormat frameFormat = frame->frameFormat();
frameFormat.setBorder(1);
frame->setFrameFormat(frameFormat);
//! [9]

//! [10]
QTextCharFormat format = cursor.charFormat();
format.setFontPointSize(fontSize);

QTextCharFormat boldFormat = format;
boldFormat.setFontWeight(QFont::Bold);

QTextCharFormat highlightedFormat = boldFormat;
highlightedFormat.setBackground(Qt::yellow);

//! [10]

//! [11]
for (int weekDay = 1; weekDay <= 7; ++weekDay) {
QTextTableCell cell = table->cellAt(0, weekDay-1);
//! [11] //! [12]
QTextCursor cellCursor = cell.firstCursorPosition();
cellCursor.insertText(QString("%1").arg(QDate::longDayName(weekDay)), boldFormat);
}
//! [12]

//! [13]
table->insertRows(table->rows(), 1);
//! [13]

while (date.month() == selectedDate.month()) {
    int weekDay = date.dayOfWeek();
    QTextTableCell cell = table->cellAt(table->rows()-1, weekDay-1);
    QTextCursor cellCursor = cell.firstCursorPosition();

    if (date == QDate::currentDate())
        cellCursor.insertText(QString("%1").arg(date.day()), highlightedFormat);
    else
        cellCursor.insertText(QString("%1").arg(date.day()), format);

    date = date.addDays(1);
    if (weekDay == 7 && date.month() == selectedDate.month())
        table->insertRows(table->rows(), 1);
}

cursor.endEditBlock();

//! [14]
setWindowTitle(tr("Calendar for %1 %2"
).arg(QDate::longMonthName(selectedDate.month())
).arg(selectedDate.year()));
}

QTextCharFormat Calender:: getBoldFormat() const
{
return boldFormat;
}
//! [14]

//! [15]
void Calender::setFontSize(int size)
{
fontSize = size;
insertCalendar();
}
//! [15]

//! [16]
void Calender::setMonth(int month)
{
selectedDate = QDate(selectedDate.year(), month + 1, selectedDate.day());
insertCalendar();
}
//! [16]

//! [17]
void Calender::setYear(QDate date)
{
selectedDate = QDate(date.year(), selectedDate.month(), selectedDate.day());
insertCalendar();
}

//! [17]

Calender::~Calender()
{

}

2个回答

主程序下的calender菜单项仍然不能显示正常,这是不是因为我在实现calender的时候使用了这种简单粗暴的方式图片说明图片说明

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