Qt/Widgets/Cursor

main.cpp

#include <QApplication>
 
#include "form.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MyForm form;
 
    form.show();
    return app.exec();
}

form.cpp

#include "form.h"
 
#include <QCursor>
 
MyForm::MyForm(QWidget *parent) : QWidget(parent)
{
  setupUi(this);
  connect( this->pushButton, SIGNAL( clicked() ), this, SLOT(pushButton_clicked()) );
  this->isWaiting = false;
}
 
void MyForm::pushButton_clicked()
{
  this->label->setText("hello");
 
  QCursor waitCursor;
  if(!isWaiting)
    {
    waitCursor.setShape(Qt::WaitCursor);
    isWaiting = true;
    }
  else
    {
    waitCursor.setShape(Qt::ArrowCursor);
    isWaiting = false;
    }
  this->setCursor(waitCursor);
}

form.h

#ifndef FORM_H
#define FORM_H
 
#include "ui_form.h"
 
class MyForm : public QWidget, private Ui::Form
{
Q_OBJECT
public:
  MyForm(QWidget *parent = 0);
 
public slots:
  void pushButton_clicked();
 
private:
  bool isWaiting;
};
 
#endif

main.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Form</class>
 <widget class="QWidget" name="Form">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>My Program</string>
  </property>
  <widget class="QPushButton" name="pushButton">
   <property name="geometry">
    <rect>
     <x>130</x>
     <y>100</y>
     <width>91</width>
     <height>28</height>
    </rect>
   </property>
   <property name="text">
    <string>Click me</string>
   </property>
  </widget>
  <widget class="QLabel" name="label">
   <property name="geometry">
    <rect>
     <x>150</x>
     <y>150</y>
     <width>61</width>
     <height>18</height>
    </rect>
   </property>
   <property name="text">
    <string>Before click</string>
   </property>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>

CMakeLists.txt

cmake_minimum_required(VERSION 2.6)
 
PROJECT(Cursor)
 
FIND_PACKAGE(Qt4 REQUIRED)
INCLUDE(${QT_USE_FILE})
 
QT4_WRAP_UI(UISrcs form.ui)
QT4_WRAP_CPP(MOCSrcs form.h)
 
include_directories(${include_directories} ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
 
ADD_EXECUTABLE(Cursor main.cpp form.cpp ${MOCSrcs} ${UISrcs})
TARGET_LINK_LIBRARIES(Cursor ${QT_LIBRARIES})