how to call Mainwindow method from a childwindow.cpp
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i tried placing connect function in both the constructors separately but there is no effect, here is my sample code.
MainWindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H#include <QMainWindow>
#include <create_config.h>
#include <QTableView>
#include <QStandardItemModel>
#include "JailHouseCell.h"
#include "JailHouseCellList.h"
#include "import.h"namespace Ui {
class MainWindow;
}class MainWindow : public QMainWindow
{
Q_OBJECTpublic:
explicit MainWindow(QWidget *parent = 0);
void get_cell_data(JailHouseCellList &jlist) ;
void get_mem_data (JailHouseCell &j) ;
void get_pci_data (JailHouseCell &j) ;
void get_irq_data (JailHouseCell &j) ;~MainWindow();private slots:
void on_pushButton_Create_Config_clicked();void on_pushButton_6_clicked(); void on_pushButton_Mem_Config_Add_clicked(); void on_pushButton_Mem_config_Delete_clicked(); void on_pushButton_IRQ_Chips_Add_clicked(); void on_pushButton_IRQ_Chips_Delete_clicked(); void on_pushButton_PCI_Devices_Add_clicked(); void on_pushButton_PCI_Devices_Delete_clicked(); void on_pushButton_Bootfile_clicked(); void on_lineEdit_HM_size_editingFinished();// void on_lineEdit_HM_size_returnPressed();
void on_lineEdit_Size_DC_editingFinished();// void on_lineEdit_Size_DC_returnPressed();
void on_pushButton_View_Configuration_clicked(); void on_pushButton_Create_clicked();// void on_lineEdit_NO_CELLS_editingFinished();
void on_comboBox_CellList_activated(QString index); void on_pushButton_Update_clicked(); void on_pushButton_Destroy_clicked(); void on_lineEdit_NO_CELLS_textChanged(const QString &arg1) ; void on_pushButton_GenerateConfigFile_clicked(); void on_lineEdit_HM_size_textChanged(const QString &arg1); void on_pushButton_import_clicked(); void slot_load_cell_dropdownlist();private:
Create_Config *cc ;
Ui::MainWindow *ui;
Import *imp ;
QTableView *view = new QTableView;
// QStandardItemModel *model; = new QStandardItemModel(25,5,this); //
JailHouseCell create_cell () ;
RootCell create_root_cell() ;
void add_mem(JailHouseCell &j) ;
void add_irq(JailHouseCell &j) ;
void add_pci(JailHouseCell &j) ;
void load_cell(int index) ;
void load_cell(std::string) ;
void load_mem(JailHouseCell &j) ;
void load_irq(JailHouseCell &j) ;
void load_pci(JailHouseCell &j) ;
void Enable_Root_Tabs() ;
void Disable_Root_Tabs() ;
void Enable_LS_Buttons() ;
void Disable_LS_Buttons() ;
void clear_cpu_config() ;
void load_cell_dropdownlist () ;
void load_cell_dropdownlist (std::string) ;
void add_Hypervisor_Memory(RootCell &r);
void add_Debug_Console(RootCell &r) ;
void add_Platform_Info(RootCell &r) ;
void load_Hypervisor_Memory(RootCell &r) ;
void load_Debug_Console(RootCell &r) ;
void load_Platform_Info(RootCell &r) ;};
#endif // MAINWINDOW_H
MainWindow.cpp (constructor)
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{ui->setupUi(this); QFont font("Plastique",10);// font.setStyleHint(QFont::Monospace);
QApplication::setFont(font);
ui->tabWidget_Main->setHidden(true);ui->tabWidget_CELL_CONFIG->setHidden(true); ui->tableWidget_cell_config_2->setColumnWidth(4,250); Disable_Root_Tabs(); Disable_LS_Buttons();// Import *temp = new Import() ;
// connect(temp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));}
Import.h (child window)
#ifndef IMPORT_H
#define IMPORT_H#include <QDialog>
namespace Ui {
class Import;
}class Import : public QDialog
{
Q_OBJECTpublic:
explicit Import(QWidget *parent = 0);
~Import();private slots:
void on_pushButton_import_config_clicked();void on_pushButton_import_dump_clicked(); void on_pushButton_create_imported_config_clicked();signals:
void after_import();private:
Ui::Import *ui;
};#endif // IMPORT_H
import.cpp (child window)
#include "import.h"
#include "ui_import.h"
#include <QFileDialog>
#include <QMessageBox>
#include "JailHouseCellList.h"
#include "readfromdump/ReadDmp.h"
#include "mainwindow.h"
#include <iostream>Import::Import(QWidget *parent) :
QDialog(parent),
ui(new Ui::Import)
{
ui->setupUi(this);
MainWindow *temp = new MainWindow() ;
connect(this, SIGNAL(after_import()),temp, SLOT(slot_load_cell_dropdownlist()));}
Import::~Import()
{
delete ui;
}void Import::on_pushButton_import_config_clicked()
{
QString filepath = QFileDialog::getOpenFileName(this, tr("Import file"), "/home","Config_Files(*.info)") ;
ui->lineEdit_config_File->setText(filepath);
}void Import::on_pushButton_import_dump_clicked()
{
QString filepath = QFileDialog::getOpenFileName(this, tr("Import file"), "/home","Dump_Files(*.dmp)") ;
ui->lineEdit_Dump_File->setText(filepath);
}void Import::on_pushButton_create_imported_config_clicked()
{
try{
std::string info_file = ui->lineEdit_config_File->text().toStdString() ;
std::string dump_file = ui->lineEdit_Dump_File->text().toStdString() ;
JailHouseCellList & JL = JailHouseCellList::getJailHouseCellList();
ReadDmp jt(info_file,dump_file);
JailHouseCell * jc = jt.get_cell();
if( RootCell * j = dynamic_cast<RootCell * >(jc) )
JL.add_rootcell_no_validation(*j);
else
JL.add_cell_no_validation(*jc);
}
catch(JailHouseCell_error & e)
{
std::string s = e.what();
QMessageBox::warning(this,"Wrong input",e.what()) ;
}
catch(std::exception & e)
{
std::string s = e.what();
QMessageBox::warning(this,"Wrong input",e.what()) ;
}
catch(...)
{
QMessageBox::warning(this,"unknownerror","unknownerror");
}
emit after_import();}
//void Import::after_import() {
// std::cout << "calling load_dropdownList() function" << std::endl ;
//}Pls help me into this
@moyin said in how to call Mainwindow method from a childwindow.cpp:
MainWindow *temp = new MainWindow() ;
Why do you create a new MainWindow instance in Import constructor?!
You should connect signals/slots in MainWindow where you create Import instance.
This is completely wrong as you create a new Import instance:// Import *temp = new Import() ; // connect(temp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));It should be
imp = new Import() ; connect(imp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist())); -
@jsulm thnks for reply,
I tried your sugesstion, but it does't resolve my issue.
while debugging into emit after_import() , i found this below lines of code can u just clear me what does it mean.// SIGNAL 0
void Import::after_import()
{
QMetaObject::activate(this, &staticMetaObject, 0, 0);
}
QT_END_MOC_NAMESPACE -
@jsulm thnks for reply,
I tried your sugesstion, but it does't resolve my issue.
while debugging into emit after_import() , i found this below lines of code can u just clear me what does it mean.// SIGNAL 0
void Import::after_import()
{
QMetaObject::activate(this, &staticMetaObject, 0, 0);
}
QT_END_MOC_NAMESPACE@moyin Your problem is for sure not in this code. Either the signal is not emitted, or not connected to slot, or (like I suggested before) you actually use the wrong Import instance (as you create a new temporary instance which you connect then)...
Can you show your code after applying my suggestion? -
@moyin Your problem is for sure not in this code. Either the signal is not emitted, or not connected to slot, or (like I suggested before) you actually use the wrong Import instance (as you create a new temporary instance which you connect then)...
Can you show your code after applying my suggestion?@jsulm thnks for rply,
this is my mainwindow.cpp (constructor)MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{ui->setupUi(this); QFont font("Plastique",10);// font.setStyleHint(QFont::Monospace);
QApplication::setFont(font);
ui->tabWidget_Main->setHidden(true);ui->tabWidget_CELL_CONFIG->setHidden(true); ui->tableWidget_cell_config_2->setColumnWidth(4,250); Disable_Root_Tabs(); Disable_LS_Buttons();// Import *temp = new Import() ;
// connect(temp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));
imp = new Import() ;
connect(imp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));}
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@jsulm thnks for rply,
this is my mainwindow.cpp (constructor)MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{ui->setupUi(this); QFont font("Plastique",10);// font.setStyleHint(QFont::Monospace);
QApplication::setFont(font);
ui->tabWidget_Main->setHidden(true);ui->tabWidget_CELL_CONFIG->setHidden(true); ui->tableWidget_cell_config_2->setColumnWidth(4,250); Disable_Root_Tabs(); Disable_LS_Buttons();// Import *temp = new Import() ;
// connect(temp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));
imp = new Import() ;
connect(imp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));}
@moyin said in how to call Mainwindow method from a childwindow.cpp:
@jsulm thnks for rply,
this is my mainwindow.cpp (constructor)MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{ui->setupUi(this); QFont font("Plastique",10);// font.setStyleHint(QFont::Monospace);
QApplication::setFont(font);
ui->tabWidget_Main->setHidden(true);ui->tabWidget_CELL_CONFIG->setHidden(true); ui->tableWidget_cell_config_2->setColumnWidth(4,250); Disable_Root_Tabs(); Disable_LS_Buttons();// Import *temp = new Import() ;
// connect(temp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));
imp = new Import() ;
connect(imp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));}
this is my import.cpp where i'm emitting signal.
#include "import.h"
#include "ui_import.h"
#include <QFileDialog>
#include <QMessageBox>
#include "JailHouseCellList.h"
#include "readfromdump/ReadDmp.h"
#include "mainwindow.h"
#include <iostream>Import::Import(QWidget *parent) :
QDialog(parent),
ui(new Ui::Import)
{
ui->setupUi(this);
QFont font("Plastique",10);
// font.setStyleHint(QFont::Monospace);
QApplication::setFont(font);}
Import::~Import()
{
delete ui;
}void Import::on_pushButton_import_config_clicked()
{
QString filepath = QFileDialog::getOpenFileName(this, tr("Import file"), "/home","Config_Files(*.info)") ;
ui->lineEdit_config_File->setText(filepath);
}void Import::on_pushButton_import_dump_clicked()
{
QString filepath = QFileDialog::getOpenFileName(this, tr("Import file"), "/home","Dump_Files(*.dmp)") ;
ui->lineEdit_Dump_File->setText(filepath);
}void Import::on_pushButton_create_imported_config_clicked()
{
try{
std::string info_file = ui->lineEdit_config_File->text().toStdString() ;
std::string dump_file = ui->lineEdit_Dump_File->text().toStdString() ;
JailHouseCellList & JL = JailHouseCellList::getJailHouseCellList();
ReadDmp jt(info_file,dump_file);
JailHouseCell * jc = jt.get_cell();
if( RootCell * j = dynamic_cast<RootCell * >(jc) )
JL.add_rootcell_no_validation(*j);
else
JL.add_cell_no_validation(*jc);
}
catch(JailHouseCell_error & e)
{
std::string s = e.what();
QMessageBox::warning(this,"Wrong input",e.what()) ;
}
catch(std::exception & e)
{
std::string s = e.what();
QMessageBox::warning(this,"Wrong input",e.what()) ;
}
catch(...)
{
QMessageBox::warning(this,"unknownerror","unknownerror");
}
emit after_import();}
//void Import::after_import() {
// std::cout << "calling load_dropdownList() function" << std::endl ;
//} -
@moyin said in how to call Mainwindow method from a childwindow.cpp:
@jsulm thnks for rply,
this is my mainwindow.cpp (constructor)MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{ui->setupUi(this); QFont font("Plastique",10);// font.setStyleHint(QFont::Monospace);
QApplication::setFont(font);
ui->tabWidget_Main->setHidden(true);ui->tabWidget_CELL_CONFIG->setHidden(true); ui->tableWidget_cell_config_2->setColumnWidth(4,250); Disable_Root_Tabs(); Disable_LS_Buttons();// Import *temp = new Import() ;
// connect(temp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));
imp = new Import() ;
connect(imp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));}
this is my import.cpp where i'm emitting signal.
#include "import.h"
#include "ui_import.h"
#include <QFileDialog>
#include <QMessageBox>
#include "JailHouseCellList.h"
#include "readfromdump/ReadDmp.h"
#include "mainwindow.h"
#include <iostream>Import::Import(QWidget *parent) :
QDialog(parent),
ui(new Ui::Import)
{
ui->setupUi(this);
QFont font("Plastique",10);
// font.setStyleHint(QFont::Monospace);
QApplication::setFont(font);}
Import::~Import()
{
delete ui;
}void Import::on_pushButton_import_config_clicked()
{
QString filepath = QFileDialog::getOpenFileName(this, tr("Import file"), "/home","Config_Files(*.info)") ;
ui->lineEdit_config_File->setText(filepath);
}void Import::on_pushButton_import_dump_clicked()
{
QString filepath = QFileDialog::getOpenFileName(this, tr("Import file"), "/home","Dump_Files(*.dmp)") ;
ui->lineEdit_Dump_File->setText(filepath);
}void Import::on_pushButton_create_imported_config_clicked()
{
try{
std::string info_file = ui->lineEdit_config_File->text().toStdString() ;
std::string dump_file = ui->lineEdit_Dump_File->text().toStdString() ;
JailHouseCellList & JL = JailHouseCellList::getJailHouseCellList();
ReadDmp jt(info_file,dump_file);
JailHouseCell * jc = jt.get_cell();
if( RootCell * j = dynamic_cast<RootCell * >(jc) )
JL.add_rootcell_no_validation(*j);
else
JL.add_cell_no_validation(*jc);
}
catch(JailHouseCell_error & e)
{
std::string s = e.what();
QMessageBox::warning(this,"Wrong input",e.what()) ;
}
catch(std::exception & e)
{
std::string s = e.what();
QMessageBox::warning(this,"Wrong input",e.what()) ;
}
catch(...)
{
QMessageBox::warning(this,"unknownerror","unknownerror");
}
emit after_import();}
//void Import::after_import() {
// std::cout << "calling load_dropdownList() function" << std::endl ;
//} -
@jsulm thanks for rply,
i dont how to confirm the signal is emitted or not but when i run the application in debug mode and step into emit after_import(); it takes me into this code snippet. that i already shared you./ SIGNAL 0
void Import::after_import()
{
QMetaObject::activate(this, &staticMetaObject, 0, 0);
}
QT_END_MOC_NAMESPACE -
@jsulm thanks for rply,
i dont how to confirm the signal is emitted or not but when i run the application in debug mode and step into emit after_import(); it takes me into this code snippet. that i already shared you./ SIGNAL 0
void Import::after_import()
{
QMetaObject::activate(this, &staticMetaObject, 0, 0);
}
QT_END_MOC_NAMESPACE@moyin You can just put a breakpoint in your slot. Or when you're in that code block then just go further (step) to see what is happening.
Also doqDebug() << connect(imp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));to see whether the connection was actually successful.
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@jsulm , yes! that is
qDebug() << connect(imp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));
returning true.And if i put BreakPoint in slot_load_cell_dropdownlist(). debugger not reaching to that BreakPoint.
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@moyin Do you by any chance have more than one Import instance?
And what are you doing in slot_load_cell_dropdownlist()? -
@jsulm
@ Do you by any chance have more than one Import instance?
YES!
Actually i have 2 import instance to the same pointer (imp) .@what are you doing in slot_load_cell_dropdownlist()?
i am just reinitialising a Qcombobox.@moyin said in how to call Mainwindow method from a childwindow.cpp:
Actually i have 2 import instance to the same pointer (imp) .
What?! Why? Then the first one is lost as you overwrite the pointer when you create the second instance. And which of them did you actually connected?
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@moyin said in how to call Mainwindow method from a childwindow.cpp:
Actually i have 2 import instance to the same pointer (imp) .
What?! Why? Then the first one is lost as you overwrite the pointer when you create the second instance. And which of them did you actually connected?
@jsulm Now i changed my code like,
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{ui->setupUi(this); QFont font("Plastique",10);// font.setStyleHint(QFont::Monospace);
QApplication::setFont(font);
ui->tabWidget_Main->setHidden(true);ui->tabWidget_CELL_CONFIG->setHidden(true); ui->tableWidget_cell_config_2->setColumnWidth(4,250); Disable_Root_Tabs(); Disable_LS_Buttons();// Import *temp = new Import() ;
// connect(temp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));
imp2 = new Import(this) ;
std::cout << "just before connect" << std::endl;
qDebug() << connect(imp2, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));
std::cout << "just after connect" << std::endl;
} -
@jsulm Now i changed my code like,
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{ui->setupUi(this); QFont font("Plastique",10);// font.setStyleHint(QFont::Monospace);
QApplication::setFont(font);
ui->tabWidget_Main->setHidden(true);ui->tabWidget_CELL_CONFIG->setHidden(true); ui->tableWidget_cell_config_2->setColumnWidth(4,250); Disable_Root_Tabs(); Disable_LS_Buttons();// Import *temp = new Import() ;
// connect(temp, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));
imp2 = new Import(this) ;
std::cout << "just before connect" << std::endl;
qDebug() << connect(imp2, SIGNAL(after_import()),this, SLOT(slot_load_cell_dropdownlist()));
std::cout << "just after connect" << std::endl;
}
