convert .ui to .h and .cpp?

[s002wjh]

how do I convert a .ui file to .h and .cpp file? qmake? or...

[kshegunov]

@s002wjh
uic to convert .ui to .h. There's no user interface compilation to .cpp.

[s002wjh]

ok thanks, I thought I watch youtube someone use qtcreator to convert pushbutton created in gui UI, and generate .cpp

[Mr-Workalot]

@kshegunov , I did this and have the .h file now, How do i execute it, sorry im really noob in this,
initially i converted .ui file to .py file and was able to run it in python, but how do i do it in c++, i only have the .h file.

[mrjj]

@Mr-Workalot
Hi and welcome to the forums.

Normally the .h file defines a struct that holds all the QWidget pointers
and you can have an instance of this and pass the parent to the
void setupUi(QMainWindow *MainWindow) function.

However, if the UI is not very complex, you could also cheat and
1: create a default GUI project
2: open the original UI file in Creator and select and copy all
3: Paste it to the new blank ui file in the default project

That way you can use it more normally than starting from a .h file :)

That said, if it has many layouts etc, it might not paste 100% correctly

There is also the option to use
https://doc.qt.io/qt-5/quiloader.html
However, that wont give easy access to the widgets so better for other use cases.

Could you paste the .h file here ?
just want to be sure you have the same as normal since i never used uic manually
so not 100% sure its the same as the default GUI project that comes with ui/h/cpp

[Mr-Workalot]

@mrjj Thanks so much for reply, Actually i used the QTDesigner and created the finalversion_with_buttons.ui file and then got the .h file by using
uic -o finalversion_with_buttons.h finalversion_with_buttons.ui in cmd prompt,,
i don't know what to do next to get the .cpp file???, i have tried QT Creator but it looks too confusing.

[Mr-Workalot]

This is finalversion_with_buttons.h ,, its a complex UI , not a basic one

/********************************************************************************
** Form generated from reading UI file 'finalversion_with_buttons.ui'
**
** Created by: Qt User Interface Compiler version 5.13.2
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef FINALVERSION_WITH_BUTTONS_H
#define FINALVERSION_WITH_BUTTONS_H

#include <QtCore/QVariant>
#include <QtWidgets/QAction>
#include <QtWidgets/QApplication>
#include <QtWidgets/QFrame>
#include <QtWidgets/QGridLayout>
#include <QtWidgets/QLabel>
#include <QtWidgets/QMainWindow>
#include <QtWidgets/QMenu>
#include <QtWidgets/QMenuBar>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QStatusBar>
#include <QtWidgets/QTextEdit>
#include <QtWidgets/QWidget>

QT_BEGIN_NAMESPACE

class Ui_MainWindow
{
public:
QAction *actionNew;
QAction *actionCopy;
QAction *actionPaste;
QAction *actionopen;
QAction *actionSave_2;
QWidget *centralwidget;
QGridLayout *gridLayout_2;
QLabel *Xml_Script_label;
QTextEdit *Cmd_buffer_textbox;
QLabel *Variable_label;
QTextEdit *UI_Sketch_textbox;
QLabel *Command_buffer_label;
QPushButton *playbutton;
QFrame *line;
QGridLayout *gridLayout;
QLabel *UI_sketch_label;
QTextEdit *Xml_Script_textbox;
QPushButton *Save_button;
QTextEdit *Execution_sketch_textbox;
QPushButton *nextstepbutton;
QTextEdit *Variable_textbox;
QLabel *Execution_Sketch_label;
QPushButton *Open_button;
QMenuBar *menubar;
QMenu *menuEdit;
QMenu *menuHelp;
QMenu *menuSettings;
QMenu *menuHelp_2;
QStatusBar *statusbar;

void setupUi(QMainWindow *MainWindow)
{
    if (MainWindow->objectName().isEmpty())
        MainWindow->setObjectName(QString::fromUtf8("MainWindow"));
    MainWindow->resize(800, 458);
    QSizePolicy sizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    sizePolicy.setHorizontalStretch(0);
    sizePolicy.setVerticalStretch(0);
    sizePolicy.setHeightForWidth(MainWindow->sizePolicy().hasHeightForWidth());
    MainWindow->setSizePolicy(sizePolicy);
    MainWindow->setMinimumSize(QSize(0, 285));
    actionNew = new QAction(MainWindow);
    actionNew->setObjectName(QString::fromUtf8("actionNew"));
    actionCopy = new QAction(MainWindow);
    actionCopy->setObjectName(QString::fromUtf8("actionCopy"));
    actionPaste = new QAction(MainWindow);
    actionPaste->setObjectName(QString::fromUtf8("actionPaste"));
    actionopen = new QAction(MainWindow);
    actionopen->setObjectName(QString::fromUtf8("actionopen"));
    actionSave_2 = new QAction(MainWindow);
    actionSave_2->setObjectName(QString::fromUtf8("actionSave_2"));
    centralwidget = new QWidget(MainWindow);
    centralwidget->setObjectName(QString::fromUtf8("centralwidget"));
    gridLayout_2 = new QGridLayout(centralwidget);
    gridLayout_2->setObjectName(QString::fromUtf8("gridLayout_2"));
    Xml_Script_label = new QLabel(centralwidget);
    Xml_Script_label->setObjectName(QString::fromUtf8("Xml_Script_label"));
    QFont font;
    font.setPointSize(12);
    Xml_Script_label->setFont(font);

    gridLayout_2->addWidget(Xml_Script_label, 3, 0, 1, 1);

    Cmd_buffer_textbox = new QTextEdit(centralwidget);
    Cmd_buffer_textbox->setObjectName(QString::fromUtf8("Cmd_buffer_textbox"));
    Cmd_buffer_textbox->setBaseSize(QSize(256, 251));

    gridLayout_2->addWidget(Cmd_buffer_textbox, 4, 3, 4, 2);

    Variable_label = new QLabel(centralwidget);
    Variable_label->setObjectName(QString::fromUtf8("Variable_label"));
    Variable_label->setFont(font);

    gridLayout_2->addWidget(Variable_label, 6, 5, 1, 1);

    UI_Sketch_textbox = new QTextEdit(centralwidget);
    UI_Sketch_textbox->setObjectName(QString::fromUtf8("UI_Sketch_textbox"));
    QSizePolicy sizePolicy1(QSizePolicy::Expanding, QSizePolicy::Expanding);
    sizePolicy1.setHorizontalStretch(250);
    sizePolicy1.setVerticalStretch(150);
    sizePolicy1.setHeightForWidth(UI_Sketch_textbox->sizePolicy().hasHeightForWidth());
    UI_Sketch_textbox->setSizePolicy(sizePolicy1);
    UI_Sketch_textbox->setMaximumSize(QSize(250, 16777215));

    gridLayout_2->addWidget(UI_Sketch_textbox, 2, 5, 1, 1);

    Command_buffer_label = new QLabel(centralwidget);
    Command_buffer_label->setObjectName(QString::fromUtf8("Command_buffer_label"));
    Command_buffer_label->setFont(font);

    gridLayout_2->addWidget(Command_buffer_label, 3, 3, 1, 2);

    playbutton = new QPushButton(centralwidget);
    playbutton->setObjectName(QString::fromUtf8("playbutton"));
    QFont font1;
    font1.setPointSize(10);
    playbutton->setFont(font1);

    gridLayout_2->addWidget(playbutton, 1, 3, 2, 1);

    line = new QFrame(centralwidget);
    line->setObjectName(QString::fromUtf8("line"));
    line->setFrameShape(QFrame::HLine);
    line->setFrameShadow(QFrame::Sunken);

    gridLayout_2->addWidget(line, 8, 0, 1, 6);

    gridLayout = new QGridLayout();
    gridLayout->setObjectName(QString::fromUtf8("gridLayout"));
    gridLayout->setSizeConstraint(QLayout::SetNoConstraint);

    gridLayout_2->addLayout(gridLayout, 0, 0, 1, 1);

    UI_sketch_label = new QLabel(centralwidget);
    UI_sketch_label->setObjectName(QString::fromUtf8("UI_sketch_label"));
    UI_sketch_label->setFont(font);

    gridLayout_2->addWidget(UI_sketch_label, 1, 5, 1, 1);

    Xml_Script_textbox = new QTextEdit(centralwidget);
    Xml_Script_textbox->setObjectName(QString::fromUtf8("Xml_Script_textbox"));
    Xml_Script_textbox->setBaseSize(QSize(256, 251));
    Xml_Script_textbox->setAutoFillBackground(true);

    gridLayout_2->addWidget(Xml_Script_textbox, 4, 0, 4, 3);

    Save_button = new QPushButton(centralwidget);
    Save_button->setObjectName(QString::fromUtf8("Save_button"));
    Save_button->setFont(font1);

    gridLayout_2->addWidget(Save_button, 1, 2, 2, 1);

    Execution_sketch_textbox = new QTextEdit(centralwidget);
    Execution_sketch_textbox->setObjectName(QString::fromUtf8("Execution_sketch_textbox"));
    sizePolicy1.setHeightForWidth(Execution_sketch_textbox->sizePolicy().hasHeightForWidth());
    Execution_sketch_textbox->setSizePolicy(sizePolicy1);
    Execution_sketch_textbox->setMaximumSize(QSize(250, 16777215));

    gridLayout_2->addWidget(Execution_sketch_textbox, 5, 5, 1, 1);

    nextstepbutton = new QPushButton(centralwidget);
    nextstepbutton->setObjectName(QString::fromUtf8("nextstepbutton"));
    nextstepbutton->setFont(font1);

    gridLayout_2->addWidget(nextstepbutton, 1, 4, 2, 1);

    Variable_textbox = new QTextEdit(centralwidget);
    Variable_textbox->setObjectName(QString::fromUtf8("Variable_textbox"));
    sizePolicy1.setHeightForWidth(Variable_textbox->sizePolicy().hasHeightForWidth());
    Variable_textbox->setSizePolicy(sizePolicy1);
    Variable_textbox->setMaximumSize(QSize(250, 16777215));

    gridLayout_2->addWidget(Variable_textbox, 7, 5, 1, 1);

    Execution_Sketch_label = new QLabel(centralwidget);
    Execution_Sketch_label->setObjectName(QString::fromUtf8("Execution_Sketch_label"));
    Execution_Sketch_label->setFont(font);

    gridLayout_2->addWidget(Execution_Sketch_label, 3, 5, 2, 1);

    Open_button = new QPushButton(centralwidget);
    Open_button->setObjectName(QString::fromUtf8("Open_button"));
    Open_button->setFont(font1);

    gridLayout_2->addWidget(Open_button, 1, 1, 2, 1);

    MainWindow->setCentralWidget(centralwidget);
    menubar = new QMenuBar(MainWindow);
    menubar->setObjectName(QString::fromUtf8("menubar"));
    menubar->setGeometry(QRect(0, 0, 800, 18));
    menuEdit = new QMenu(menubar);
    menuEdit->setObjectName(QString::fromUtf8("menuEdit"));
    menuHelp = new QMenu(menubar);
    menuHelp->setObjectName(QString::fromUtf8("menuHelp"));
    menuSettings = new QMenu(menubar);
    menuSettings->setObjectName(QString::fromUtf8("menuSettings"));
    menuHelp_2 = new QMenu(menubar);
    menuHelp_2->setObjectName(QString::fromUtf8("menuHelp_2"));
    MainWindow->setMenuBar(menubar);
    statusbar = new QStatusBar(MainWindow);
    statusbar->setObjectName(QString::fromUtf8("statusbar"));
    MainWindow->setStatusBar(statusbar);

    menubar->addAction(menuEdit->menuAction());
    menubar->addAction(menuHelp->menuAction());
    menubar->addAction(menuSettings->menuAction());
    menubar->addAction(menuHelp_2->menuAction());
    menuEdit->addSeparator();
    menuEdit->addAction(actionCopy);
    menuEdit->addAction(actionPaste);

    retranslateUi(MainWindow);

    QMetaObject::connectSlotsByName(MainWindow);
} // setupUi

void retranslateUi(QMainWindow *MainWindow)
{
    MainWindow->setWindowTitle(QCoreApplication::translate("MainWindow", "UI Tool", nullptr));
    actionNew->setText(QCoreApplication::translate("MainWindow", "New", nullptr));

#if QT_CONFIG(statustip)
actionNew->setStatusTip(QCoreApplication::translate("MainWindow", "Create a New File", nullptr));
#endif // QT_CONFIG(statustip)
#if QT_CONFIG(shortcut)
actionNew->setShortcut(QCoreApplication::translate("MainWindow", "Ctrl+N", nullptr));
#endif // QT_CONFIG(shortcut)
actionCopy->setText(QCoreApplication::translate("MainWindow", "Copy", nullptr));
#if QT_CONFIG(statustip)
actionCopy->setStatusTip(QCoreApplication::translate("MainWindow", "Copy a File", nullptr));
#endif // QT_CONFIG(statustip)
#if QT_CONFIG(shortcut)
actionCopy->setShortcut(QCoreApplication::translate("MainWindow", "Ctrl+C", nullptr));
#endif // QT_CONFIG(shortcut)
actionPaste->setText(QCoreApplication::translate("MainWindow", "Paste", nullptr));
#if QT_CONFIG(statustip)
actionPaste->setStatusTip(QCoreApplication::translate("MainWindow", "Paste a file", nullptr));
#endif // QT_CONFIG(statustip)
#if QT_CONFIG(shortcut)
actionPaste->setShortcut(QCoreApplication::translate("MainWindow", "Ctrl+V", nullptr));
#endif // QT_CONFIG(shortcut)
actionopen->setText(QCoreApplication::translate("MainWindow", "Open", nullptr));
#if QT_CONFIG(statustip)
actionopen->setStatusTip(QCoreApplication::translate("MainWindow", "Open an XML File", nullptr));
#endif // QT_CONFIG(statustip)
#if QT_CONFIG(shortcut)
actionopen->setShortcut(QCoreApplication::translate("MainWindow", "Ctrl+S", nullptr));
#endif // QT_CONFIG(shortcut)
actionSave_2->setText(QCoreApplication::translate("MainWindow", "Save", nullptr));
Xml_Script_label->setText(QCoreApplication::translate("MainWindow", "XML Script", nullptr));
Variable_label->setText(QCoreApplication::translate("MainWindow", "Variable", nullptr));
Command_buffer_label->setText(QCoreApplication::translate("MainWindow", "Command Buffer", nullptr));
playbutton->setText(QCoreApplication::translate("MainWindow", "Play", nullptr));
UI_sketch_label->setText(QCoreApplication::translate("MainWindow", "UI Sketch", nullptr));
Save_button->setText(QCoreApplication::translate("MainWindow", "Save", nullptr));
nextstepbutton->setText(QCoreApplication::translate("MainWindow", "Next Step", nullptr));
Execution_Sketch_label->setText(QCoreApplication::translate("MainWindow", "Execution Sketch", nullptr));
Open_button->setText(QCoreApplication::translate("MainWindow", "Open", nullptr));
menuEdit->setTitle(QCoreApplication::translate("MainWindow", "File", nullptr));
menuHelp->setTitle(QCoreApplication::translate("MainWindow", "Help", nullptr));
menuSettings->setTitle(QCoreApplication::translate("MainWindow", "Settings", nullptr));
menuHelp_2->setTitle(QCoreApplication::translate("MainWindow", "Help", nullptr));
} // retranslateUi

};

namespace Ui {
class MainWindow: public Ui_MainWindow {};
} // namespace Ui

QT_END_NAMESPACE

#endif // FINALVERSION_WITH_BUTTONS_H

[Pl45m4]

@Mr-Workalot said in convert .ui to .h and .cpp?:

i don't know what to do next to get the .cpp file???

What *.cpp are you talking about? You have to write your logic by yourself. You can not design a cpp-file with UI designer. As @kshegunov said 3 1/2 years ago, there is no translation from UI to cpp. The User Interface Compiler (UIC) generates a header to provide all the widgets and settings, you've created or edited with QtDesigner (your UI file).

Tested your header, worked for me. So I guess, you can load it with UiLoader or something else to get your GUI.

btw finalversion_with_buttons.ui is a horrible name for an UI-file inside a project ;-)