enable shortcuts using Designer

[szisziszilvi]

Hi all,

I would like to use shortcuts in my GUI application. In the Big Book (C++-GUI Programming with Qt4 - 1st ed) I found an example, which works very well, in which the author suggests to enable the shortcut simply by declarating like this:

findButton = new QPushButton(tr("&Find"));

But in this example we don't use the Designer. My application on the other hand was created with the help of the Designer embedded into QtCreator. I tryed to define the text variable like "&next" (ect), and in the designer I can see the underlined letters, but they disappear when I try to run the program, as if it has never been set.

Thanks for future help
Szilvi

[wysota]

It's not because you use Designer but rather because you use a label. Labels need to be associated with other widgets using the "buddy" mechanism for accelerators to work.

[szisziszilvi]

No, the goal is to use the shortcuts for my buttons. Maybe this printscreen helps to see better what I might misundertand.

[wysota]

When the program is running press "alt" (or was it "ctrl"?) and see if you get your underscore. If it doesn't work, post your ui file.

[szisziszilvi]

I tried that alt-thing, because I've read that in some description, but that does not work.

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>kepMegjelenito</class>
 <widget class="QWidget" name="kepMegjelenito">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>800</width>
    <height>600</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>kepMegjelenito</string>
  </property>
  <property name="autoFillBackground">
   <bool>false</bool>
  </property>
  <widget class="QLabel" name="tartalomLabel">
   <property name="geometry">
    <rect>
     <x>20</x>
     <y>330</y>
     <width>361</width>
     <height>20</height>
    </rect>
   </property>
   <property name="text">
    <string>Itt lesz majd a file tartalma.</string>
   </property>
  </widget>
  <widget class="QLabel" name="infoLabel">
   <property name="geometry">
    <rect>
     <x>60</x>
     <y>370</y>
     <width>491</width>
     <height>16</height>
    </rect>
   </property>
   <property name="text">
    <string>Az  a cĂ©l, hogy a jobb oldali listában file-ok legyenek, amiknek elsĹ‘ sorát a bal oldalon megjelenĂ*tem.</string>
   </property>
  </widget>
  <widget class="QPushButton" name="closeButton">
   <property name="geometry">
    <rect>
     <x>10</x>
     <y>10</y>
     <width>141</width>
     <height>61</height>
    </rect>
   </property>
   <property name="text">
    <string>&amp;KLĂ“Z</string>
   </property>
  </widget>
  <widget class="QWidget" name="layoutWidget">
   <property name="geometry">
    <rect>
     <x>630</x>
     <y>30</y>
     <width>161</width>
     <height>321</height>
    </rect>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QPushButton" name="kvtButton">
      <property name="text">
       <string>&amp;Valasztok Konyvtarat</string>
      </property>
     </widget>
    </item>
    <item>
     <widget class="QLabel" name="listLabel">
      <property name="text">
       <string>A kiválasztott kvt tartalma:</string>
      </property>
     </widget>
    </item>
    <item>
     <widget class="QListWidget" name="myListWidget"/>
    </item>
   </layout>
  </widget>
  <widget class="QLabel" name="staticPicLabel">
   <property name="geometry">
    <rect>
     <x>180</x>
     <y>10</y>
     <width>141</width>
     <height>91</height>
    </rect>
   </property>
   <property name="text">
    <string>TextLabel</string>
   </property>
  </widget>
  <widget class="QLabel" name="imageLabel">
   <property name="geometry">
    <rect>
     <x>40</x>
     <y>110</y>
     <width>411</width>
     <height>201</height>
    </rect>
   </property>
   <property name="text">
    <string>TextLabel</string>
   </property>
  </widget>
  <widget class="QPushButton" name="nextButton">
   <property name="geometry">
    <rect>
     <x>440</x>
     <y>300</y>
     <width>75</width>
     <height>23</height>
    </rect>
   </property>
   <property name="text">
    <string>&amp;next</string>
   </property>
  </widget>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections>
  <connection>
   <sender>closeButton</sender>
   <signal>clicked()</signal>
   <receiver>kepMegjelenito</receiver>
   <slot>close()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>90</x>
     <y>34</y>
    </hint>
    <hint type="destinationlabel">
     <x>156</x>
     <y>11</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>myListWidget</sender>
   <signal>itemClicked(QListWidgetItem*)</signal>
   <receiver>kepMegjelenito</receiver>
   <slot>listaelemKivalasztva(QListWidgetItem*)</slot>
   <hints>
    <hint type="sourcelabel">
     <x>685</x>
     <y>225</y>
    </hint>
    <hint type="destinationlabel">
     <x>371</x>
     <y>36</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>myListWidget</sender>
   <signal>itemActivated(QListWidgetItem*)</signal>
   <receiver>kepMegjelenito</receiver>
   <slot>listaelemKivalasztva(QListWidgetItem*)</slot>
   <hints>
    <hint type="sourcelabel">
     <x>657</x>
     <y>272</y>
    </hint>
    <hint type="destinationlabel">
     <x>567</x>
     <y>198</y>
    </hint>
   </hints>
  </connection>
 </connections>
 <slots>
  <slot>listaelemKivalasztva(QListWidgetItem*)</slot>
 </slots>
</ui>

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>kepMegjelenito</class>
 <widget class="QWidget" name="kepMegjelenito">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>800</width>
    <height>600</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>kepMegjelenito</string>
  </property>
  <property name="autoFillBackground">
   <bool>false</bool>
  </property>
  <widget class="QLabel" name="tartalomLabel">
   <property name="geometry">
    <rect>
     <x>20</x>
     <y>330</y>
     <width>361</width>
     <height>20</height>
    </rect>
   </property>
   <property name="text">
    <string>Itt lesz majd a file tartalma.</string>
   </property>
  </widget>
  <widget class="QLabel" name="infoLabel">
   <property name="geometry">
    <rect>
     <x>60</x>
     <y>370</y>
     <width>491</width>
     <height>16</height>
    </rect>
   </property>
   <property name="text">
    <string>Az  a cĂ©l, hogy a jobb oldali listában file-ok legyenek, amiknek elsĹ‘ sorát a bal oldalon megjelenĂ*tem.</string>
   </property>
  </widget>
  <widget class="QPushButton" name="closeButton">
   <property name="geometry">
    <rect>
     <x>10</x>
     <y>10</y>
     <width>141</width>
     <height>61</height>
    </rect>
   </property>
   <property name="text">
    <string>&amp;KLĂ“Z</string>
   </property>
  </widget>
  <widget class="QWidget" name="layoutWidget">
   <property name="geometry">
    <rect>
     <x>630</x>
     <y>30</y>
     <width>161</width>
     <height>321</height>
    </rect>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QPushButton" name="kvtButton">
      <property name="text">
       <string>&amp;Valasztok Konyvtarat</string>
      </property>
     </widget>
    </item>
    <item>
     <widget class="QLabel" name="listLabel">
      <property name="text">
       <string>A kiválasztott kvt tartalma:</string>
      </property>
     </widget>
    </item>
    <item>
     <widget class="QListWidget" name="myListWidget"/>
    </item>
   </layout>
  </widget>
  <widget class="QLabel" name="staticPicLabel">
   <property name="geometry">
    <rect>
     <x>180</x>
     <y>10</y>
     <width>141</width>
     <height>91</height>
    </rect>
   </property>
   <property name="text">
    <string>TextLabel</string>
   </property>
  </widget>
  <widget class="QLabel" name="imageLabel">
   <property name="geometry">
    <rect>
     <x>40</x>
     <y>110</y>
     <width>411</width>
     <height>201</height>
    </rect>
   </property>
   <property name="text">
    <string>TextLabel</string>
   </property>
  </widget>
  <widget class="QPushButton" name="nextButton">
   <property name="geometry">
    <rect>
     <x>440</x>
     <y>300</y>
     <width>75</width>
     <height>23</height>
    </rect>
   </property>
   <property name="text">
    <string>&amp;next</string>
   </property>
  </widget>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections>
  <connection>
   <sender>closeButton</sender>
   <signal>clicked()</signal>
   <receiver>kepMegjelenito</receiver>
   <slot>close()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>90</x>
     <y>34</y>
    </hint>
    <hint type="destinationlabel">
     <x>156</x>
     <y>11</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>myListWidget</sender>
   <signal>itemClicked(QListWidgetItem*)</signal>
   <receiver>kepMegjelenito</receiver>
   <slot>listaelemKivalasztva(QListWidgetItem*)</slot>
   <hints>
    <hint type="sourcelabel">
     <x>685</x>
     <y>225</y>
    </hint>
    <hint type="destinationlabel">
     <x>371</x>
     <y>36</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>myListWidget</sender>
   <signal>itemActivated(QListWidgetItem*)</signal>
   <receiver>kepMegjelenito</receiver>
   <slot>listaelemKivalasztva(QListWidgetItem*)</slot>
   <hints>
    <hint type="sourcelabel">
     <x>657</x>
     <y>272</y>
    </hint>
    <hint type="destinationlabel">
     <x>567</x>
     <y>198</y>
    </hint>
   </hints>
  </connection>
 </connections>
 <slots>
  <slot>listaelemKivalasztva(QListWidgetItem*)</slot>
 </slots>
</ui>

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[wysota]

It seems to work fine for me, the accelerator on the "next" is shown correctly.

This is my test application:

#include "ui_tst.h"                                                                                                                                                                            
#include <QtGui>                                                                                                                                                                               
 
int main(int argc, char **argv) {                                                                                                                                                              
  QApplication app(argc, argv);                                                                                                                                                                
  QWidget w;                                                                                                                                                                                   
  Ui::kepMegjelenito ui;                                                                                                                                                                       
  ui.setupUi(&w);                                                                                                                                                                              
  w.show();                                                                                                                                                                                    
  return app.exec();                                                                                                                                                                           
}

#include "ui_tst.h"                                                                                                                                                                            
#include <QtGui>                                                                                                                                                                               
                                                                                                                                                                                               
int main(int argc, char **argv) {                                                                                                                                                              
  QApplication app(argc, argv);                                                                                                                                                                
  QWidget w;                                                                                                                                                                                   
  Ui::kepMegjelenito ui;                                                                                                                                                                       
  ui.setupUi(&w);                                                                                                                                                                              
  w.show();                                                                                                                                                                                    
  return app.exec();                                                                                                                                                                           
}

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[szisziszilvi]

I use my own class, maybe there is some difference then in the usage. I usually use the creator's templates. (I don't post here everything, just the relevant parts.)

main.cpp:

#include <QtGui/QApplication>
#include "kepmegjelenito.h"
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    kepMegjelenito w;
    w.show();
    return a.exec();
}

#include <QtGui/QApplication>
#include "kepmegjelenito.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    kepMegjelenito w;
    w.show();
    return a.exec();
}

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kepmegjelenito.h:

#ifndef KEPMEGJELENITO_H
#define KEPMEGJELENITO_H
 
#include <QWidget>
#include (... some other included classes ...)
 
namespace Ui {
    class kepMegjelenito;
}
 
class kepMegjelenito : public QWidget {
    Q_OBJECT
public:
    kepMegjelenito(QWidget *parent = 0);
    ~kepMegjelenito();
 
private:
    Ui::kepMegjelenito *ui;
    (...)
 
public slots:    (..)
 
 signals:(...)
};
 
#endif // KEPMEGJELENITO_H

#ifndef KEPMEGJELENITO_H
#define KEPMEGJELENITO_H

#include <QWidget>
#include (... some other included classes ...)

namespace Ui {
    class kepMegjelenito;
}

class kepMegjelenito : public QWidget {
    Q_OBJECT
public:
    kepMegjelenito(QWidget *parent = 0);
    ~kepMegjelenito();

private:
    Ui::kepMegjelenito *ui;
    (...)
    
public slots:    (..)

 signals:(...)
};

#endif // KEPMEGJELENITO_H

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I gues there is no point showing the other codes, there is no other file, just the form, the main, this header and the "kepmegjelenito.cpp".
in case it is still not enough info, here is the whole work: http://szisziszilvi.lima-city.de/temp/kepMegjelenitozip (which is a normal renamed zip, I could not copy to the webspace when there was that '.' character. 8.711 k)

[wysota]

Sorry, I'm not going to look through 8MB of code First of all try putting your ui into the same code I used for testing and see if it works or not.

[szisziszilvi]

you're right, I was simply too stupid, no excuse... so now I changed the file to another with the same name, but without the compile outputs... 5 k sounds better, eh?
(this is a testwork for testing some functionalities, so not a very clever code, pretty easy to reach unexpected exit, but the main goal is not that.)

I'll try your one as well (probably just tomorrow), but I'm still interested wat's wrong with my version. might be a useful lecture

anyway I've made now a very simple application with a single close-button, ant this feature works just as it should. I'm trying to find the key difference.