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UI not seen
Hi
I am beginner in QT and C++ so I'm sorry for my lame question.
I'm using QT designer and I would like to call function from myfile.cpp in
on_pushButton_clicked() function.
The code below generates following error: 2065 'ui' undeclaed idenifier. Replacing by MainWindow.ui.label3(..) generate errors:syntax error:missing ';' before' .' And I don't know how tu call this function properly.
MyFile.h
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void MyFunction(void);
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myfile.cpp
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#include "MyFile.h"
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include
#include
void MyFunction(void)
{
ui.label_3->setPixmap(QPixmap(":/icons/MyImage.JPG"));
}
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.....
mainwindow.cpp:
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#include "MyFile.h"
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include
#include
....
void MainWindow::on_pushButton_clicked() { MyFunction(); }
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read sig (How do we know what 'ui' is if you dont show its definition
).
(p.s. 'ui' is probably a pointer, not an object => use ui-> not ui.)
If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.
Thank You for reply.
Whole my code is below. I use QT designer.
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#ifndef CURRENTSOURCES_H
#define CURRENTSOURCES_H
void CurrentSource1_init(void);
#endif // CURRENTSOURCES_H[code] :pinch:
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[/code]
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#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
friend void CurrentSource1_init();
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();
void on_pushButton_3_clicked();
void on_pushButton_4_clicked();
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
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CurrentSource1.cpp
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#include "CurrentSources.h"
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtGui>
#include <QLabel>
void CurrentSource1_Init(void)
{
MainWindow.ui->label_3->setPixmap(QPixmap(":/ikonki/ikonki/CurrentSource1.JPG"));
}
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main.cpp
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#include <QtGui/QApplication>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
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mainwindow.cpp
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#include "CurrentSources.h"
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtGui>
#include <QLabel>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
CurrentSource1_init();
}
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do you still have a problem?
If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.
Yes, I forgot copy errors:
C:\QT_projekty\Wspomaganie2-build-desktop-Qt_4_8_1_for_Desktop_-_MSVC2010__Qt_SDK__Release\..\Wspomaganie2\CurrentSource1.cpp:9: błąd:C2143: syntax error : missing ';' before '.'
C:\QT_projekty\Wspomaganie2-build-desktop-Qt_4_8_1_for_Desktop_-_MSVC2010__Qt_SDK__Release\..\Wspomaganie2\CurrentSource1.cpp:9: błąd:C2143: syntax error : missing ';' before '.'
MainWindow is class. You cannot call normal member methods or access member variables on a class. You can only access them through a class INSTANCE.
In other words
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MainWindow.ui; // NO!
MainWindow mw; // make the instance!
mw.ui; // ok - but ONLY if 'ui' is public!
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If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.
why the frick are you doing that 'thing' with currentsource1 anyway? Why isn't it normal member method of MainWindow?
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class MainWindow
{
...
private:
void init();
}
// cpp
void
MainWindow::init()
{
ui->label_3->setPixmap(QPixmap(":/ikonki/ikonki/CurrentSource1.JPG"));
}
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If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.
Thanks for Your replies and for Your patience
Making this function member resolved the problem.
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