我在主窗口的QMdi区域设置了一个子风向。然后我做了一个QDialog,我希望用户输入Sub窗口的标题名称。但是在尝试将windowTitle()更改为该变量时,我总是遇到错误。
有没有办法更新windowTitle()?
moduleName.cpp
#include "stdafx.h"
#include "moduleName.h"
#include "iwb4.h"
#include <Windows.h>
#include <QtGui/QAction>
#include <qdom.h>
#include <qmdiarea.h>
#include "ui_module_name.h"
#include "ui_iwb4.h"
#include <qmdisubwindow.h>
moduleName::moduleName(QDialog *parent)
: QDialog(parent)
{
ui.setupUi(this);
show();
// connect ok button to save the module name
connect(ui.okButton, SIGNAL(pressed()), this, SLOT(okClicked()));
}
moduleName::~moduleName()
{
}
void moduleName::okClicked()
{
iwb4 iwb;
QTextDocument* tName = ui.textEdit->document();
iwb.p_name = tName->toPlainText();
moduleName::close();
iwb.name();
}
moduleName.h
#ifndef MODULENAME_H
#define MODULENAME_H
#include <QtGui/QWidget>
#include "ui_module_name.h"
class moduleName : public QDialog
{
Q_OBJECT
public:
moduleName(QDialog *parent = 0);
~moduleName();
public slots:
void okClicked();
protected:
Ui::Dialog ui;
};
#endif // MODULENAME_H
iwb4.cpp
#include "stdafx.h"
#include "iwb4.h"
#include <Windows.h>
#include "ui_iwb4.h"
#include <QtGui/QAction>
#include <qdom.h>
#include <qmdiarea.h>
#include "ui_module_name.h"
#include "moduleName.h"
#include <qmdisubwindow.h>
iwb4::iwb4(QWidget *parent, Qt::WFlags flags)
: QMainWindow(parent, flags)
{
ui.setupUi(this);
iwb4::showMaximized();
p_name = " ";
// new module button
connect(ui.actionNewModule, SIGNAL(triggered()), this, SLOT(makeModule()));
}
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
iwb4::~iwb4()
{
}
void iwb4::newModule(QString name)
{
m_file = new QFile("C:\\Users\\Hanna\\Desktop\\iwb\\Projekt\\iwb4\\iwb4\\Datenmodell\\module.xml");
m_file->open(QFile::ReadWrite | QFile::Text);
QDomDocument doc;
doc.setContent(m_file);
m_file->close();
m_dockWidget = new QDockWidget(m_parent);
m_dockWidget->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea | Qt::BottomDockWidgetArea | Qt::TopDockWidgetArea);
m_dockWidget->showMaximized();
m_dockWidget->setTitleBarWidget(new QWidget());
m_pTableWidget = new QTableWidget(m_dockWidget);
m_dockWidget->setWidget(m_pTableWidget);
addDockWidget(Qt::LeftDockWidgetArea, m_dockWidget);
m_pTableWidget->setRowCount(10);
QDomElement elem = doc.documentElement();
m_pTableWidget->setColumnCount(elem.childNodes().count());
for (int i = 0; i < elem.childNodes().count(); i++)
{
QString header = elem.childNodes().at(i).toElement().attribute("Name");
m_TableHeader += header;
}
m_pTableWidget->setHorizontalHeaderLabels(m_TableHeader);
m_pTableWidget->horizontalHeader()->setResizeMode(QHeaderView::Stretch);
m_pTableWidget->verticalHeader()->setVisible(false);
m_pTableWidget->setSelectionBehavior(QAbstractItemView::SelectRows);
m_pTableWidget->setSelectionMode(QAbstractItemView::SingleSelection);
m_pTableWidget->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
m_pTableWidget->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
m_pTableWidget->setShowGrid(true);
m_pTableWidget->resizeColumnsToContents();
m_pTableWidget->resizeRowsToContents();
m_pTableWidget->setMaximumWidth(400);
m_pTableWidget->setMaximumHeight(300);
connect( m_pTableWidget, SIGNAL( cellDoubleClicked (int, int) ),
this, SLOT( cellSelected( int, int ) ) );
}
void iwb4::makeModule()
{
QString name;
name = p_name;
newModule(name);
QDockWidget *dock = m_dockWidget;
m_subWindow = ui.mdiArea->addSubWindow(dock);
ui.mdiArea->DontMaximizeSubWindowOnActivation;
dock->show();
dock->activateWindow();
// make rename option in right click menu
QMenu *menu = m_subWindow->systemMenu();
rename = new QAction(tr("Rename"),menu);
menu->addAction(rename);
connect(rename, SIGNAL(triggered()), this, SLOT(newName()));
}
void iwb4::newName()
{
moduleName* p_nameDialog = new moduleName();
}
void iwb4::name()
{
QString name = p_name;
m_subWindow->setWindowTitle(name);
}
iwb4.h
#ifndef IWB4_H
#define IWB4_H
#include <QtGui/QMainWindow>
#include "ui_iwb4.h"
class iwb4 : public QMainWindow
{
Q_OBJECT
public:
iwb4(QWidget *parent = 0, Qt::WFlags flags = 0);
~iwb4();
private:
private slots:
void makeModule();
public slots:
void newName();
public:
void newModule(QString name);
void name();
QFile* m_file;
QDockWidget* m_dockWidget;
QTableWidget* m_pTableWidget;
QMdiSubWindow* m_subWindow;
QStringList m_TableHeader;
QString p_name;
QAction *rename;
protected:
Ui::iwb4Class ui;
};
#endif // IWB4_H
感谢您的帮助。
答案 0 :(得分:0)
windowTitle()
会返回一个副本,因此这行无用(您只修改副本):
window->windowTitle() = name;
相反,只需直接使用setWindowTitle
:
window->setWindowTitle(name);
答案 1 :(得分:0)
windowTitle()只返回窗口标题的另一个副本,因此更改它不会更改要更改的标题。
如果需要更改标题,则直接使用setWindowTitle(name);
窗口 - &GT; setWindowTitle(窗口 - &GT; WINDOWTITLE());是无用的声明,因为你再次将窗口的标题设置为其原始标题。
答案 2 :(得分:0)
void iwb4::name()
{
QString name;
name = p_name;
QMdiSubWindow* window;
window = m_subWindow;
window->windowTitle() = name;
window->setWindowTitle(window->windowTitle());
}
window->windowTitle( )
是一个吸气剂。
window->setWindowTitle( )
是一个制定者。
getter的工作是获取值,而setter的工作是更新值。
所以运行它会起作用:
void iwb4::name()
{
QString name;
name = "MyNewWindowName";
m_subWindow->setWindowTitle( name );
}
你在这里遇到同样的问题:
void iwb4::makeModule()
{
QString name;
name = p_name;
newModule(name);
QDockWidget *dock = m_dockWidget;
m_subWindow = ui.mdiArea->addSubWindow(dock);
ui.mdiArea->DontMaximizeSubWindowOnActivation;
ui.mdiArea->windowTitle() = name;
ui.mdiArea->setWindowTitle(ui.mdiArea->windowTitle());
dock->show();
dock->activateWindow();
// make rename option in right click menu
QMenu *menu = m_subWindow->systemMenu();
rename = new QAction(tr("Rename"),menu);
menu->addAction(rename);
connect(rename, SIGNAL(triggered()), this, SLOT(newName()));
}
将其更改为:
void iwb4::makeModule()
{
QString name;
name = p_name;
newModule(name);
QDockWidget *dock = m_dockWidget;
m_subWindow = ui.mdiArea->addSubWindow(dock);
ui.mdiArea->DontMaximizeSubWindowOnActivation;
//ui.mdiArea->windowTitle() = name; // <--
ui.mdiArea->setWindowTitle(name); // <--
dock->show();
dock->activateWindow();
// make rename option in right click menu
QMenu *menu = m_subWindow->systemMenu();
rename = new QAction(tr("Rename"),menu);
menu->addAction(rename);
connect(rename, SIGNAL(triggered()), this, SLOT(newName()));
}