未知类型名称错误 Qt C++

Question

我有 2 个 Qt 窗口，即MainWindow和GraphWindow;GraphWindow类具有一系列QCustomPlot小部件，其中将绘制来自其他类的数据。在MainWindow实现文件中，我实例化了一个GraphWindow对象并将其地址传递给其他类，以便在同一窗口中生成所有绘图。但我的问题是，当我尝试传递GraphWindow对象的地址时，Qt 会抛出以下错误;

Unknown type name GraphWindow

我已经在所有使用GraphWindow对象的类中包含graphwindow.h。

这是类声明GraphWindow;

#ifndef GRAPHWINDOW_H
#define GRAPHWINDOW_H
#include <QDialog>
#include <mainwindow.h>
#include <incomestatement.h>
#include <balancesheet.h>
#include <cashflow.h>
#include <dcf.h>
#include <QList>
#include <QStringList>
#include <QString>
#include <qcustomplot.h>
#include <QSharedPointer>
#include <QHash>
namespace Ui
{
class GraphWindow;
}

class GraphWindow : public QDialog
{
Q_OBJECT
public:
explicit GraphWindow(QWidget *parent = 0);
~GraphWindow();
void plotData(QStringList labels, QList<double> yData,QString xLabel, QString yLabel, QString slot);
private:
Ui::GraphWindow *ui;
QHash<QString, QCustomPlot* > dynamicWidgetHash;
QStringList widgetStringList;
QVector<double> setupXAxis(QStringList labels, QString slot, QString xLabel);
void setupYAxis(QVector<double> yData, QString slot, QString yLabel);
void setupLegend(QString slot);
void setHash(QStringList widgetStringList);
};
#endif // GRAPHWINDOW_H

这是创建 GrapWindow 对象的mainwindow.cpp;

void MainWindow::on_runButton_clicked()
{
//Create grapher object and pass the address to all sub-classes to plot on the same widget
GraphWindow graphWindow;
if(globalPath.isEmpty() == false)
{
//Create input QXlsx::Document Object
QXlsx::Document inputDoc(globalPath);
//      QString fileName = QFileDialog::getSaveFileName(this, tr("Save File"),
//                                   "/home/jana/untitled.png",
//                                   tr("Images (*.png *.xpm *.jpg)"));
//Create financial statement objects and compute values
IncomeStatement incState(inputDoc,graphWindow);
incState.computePoints(MainWindow::pointsListINC_ST,MainWindow::incSettingList,
MainWindow::incItemList,inputDoc);
}
}

这是incomestatement.h，一个是使用GraphWindow对象的类。

#ifndef INCOMESTATEMENT_H
#define INCOMESTATEMENT_H
#include <QString>
#include <xlsxdocument.h>
#include <xlsxformat.h>
#include <QVector>
#include <QList>
#include <pointssystem.h>
#include <graphwindow.h>
class IncomeStatement
{
//Declare PointsSystem as FRIEND of IncomeStatement to access private members
friend class PointsSystem;
public:
IncomeStatement(QXlsx::Document& inputDoc, GraphWindow& grapher);
//Public member function to be called from mainwindow.cpp
double computePoints(QList<QList<bool> > userSettings, QList<QStringList> itemStringList,
QStringList comboBoxItems, QXlsx::Document& inputDoc);
private:
int cursorRow;
int cursorCol;
double scoredPoints;
double totalPoints;
QStringList timelineList;
QList<double> revenueGrowthArr;
QList<double>costOfRevenGrowthArr;
QList<double>operIncGrowthArr;
QList<double>netIncGrowthArr;
QList<double>totOperExpGrowthArr;
QList<double>grossMarginArr;
QList<double>opIncMarginArr;
QList<double>netIncMarginArr;

QXlsx::Format format(QXlsx::Document& inputDoc, int mode);
bool setSheetName(QXlsx::Document& inputDoc);
void process(QXlsx::Document& inputDoc, GraphWindow& grapher);
int searchKey(QString key,QXlsx::Document& inputDoc);
int findCursorPointRow(QXlsx::Document& inputDoc);
int findCursorPointCol(QXlsx::Document& inputDoc);
void revenueGrowth(QXlsx::Document& inputDoc);
void growthComputation(QXlsx::Document& inputDoc, QString criterion, QList<double>&storageList);
void marginComputation(QXlsx::Document& inputDoc, QString criterion, QList<double>&storageList);
QStringList extractTimeline(QXlsx::Document& inputDoc);
void writeStockAnalysis(QXlsx::Document& inputDoc, QList<QList<QVariant> > data);
void writeStockAnalysisHeader(QXlsx::Document& inputDoc);
void writePointsSumData(QXlsx::Document& inputDoc);
#endif // INCOMESTATEMENT_H

这是怎么回事？

Answer 1

你不应该从graphwindow.h#include <mainwindow.h>，如果主窗口使用图形窗口是没有意义的。

如果你需要包含，你的设计有问题。 在这种情况下，您可以通过包含来自graphwindow.cpp的mainwindow.h来规避该问题，并为graphwindow.h中的主窗口所需的所有内容提供前向声明。 无论如何，与其规避问题，不如重新考虑设计......