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(C++) QtExample16

 

QtQt CreatorLubuntuUbuntu

 

This Qt example shows how to using resources, like this screenshot (png).

 

 

 

 

 

 

Using resources in Qt Creator 2.0.0

 

Here follows a step-by-step guide to add a bitmap as a resource to a Qt Creator project:

 

  1. View screenshot
  2. In the Project Manager, right-click on the project name on on the 'Sources' folder. Click 'Add New'
  3. View screenshot
  4. In the 'New File' dialog, select to create a new 'Qt Resource file'
  5. View screenshot
  6. In the 'New Qt Resource file -> Location' dialog, give the resource file a name. For example, 'MyResources'
  7. View screenshot
  8. In the 'New Qt Resource file -> Project management' dialog, click 'Finish'
  9. View screenshot
  10. As you can see, 'MyResources.qrc' has now been added to the Project Manager. Double-click on 'MyResources.qrt' and click 'Add -> Add Prefix' (which is all there is to choose yet)
  11. View screenshot
  12. Change the prefix to a more fitting name, for example 'MyImages'.
  13. View screenshot
  14. Click 'Add -> Add Files' and add an image. In this example, this is a file called 'BeerSmall.bmp' (a sprite from BeerWanter)
  15. View screenshot
  16. Now, the file has been added to your resources. The image can be accessed with the filename ':/MyImages/BeerSmall.bmp'
  17. View screenshot
  18. Copy-paste the example code below
  19. View final screenshot

Technical facts

 

Application type(s)

Operating system(s) or programming environment(s)

IDE(s):

Project type:

C++ standard:

Compiler(s):

Libraries used:

 

 

 

 

 

Qt project file: ./CppQtExample16/CppQtExample16.pro

 

exists(../../DesktopApplication.pri) {
  include(../../DesktopApplication.pri)
}
!exists(../../DesktopApplication.pri) {
  QT += core gui
  greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
  TEMPLATE = app

  CONFIG(debug, debug|release) {
    message(Debug mode)
  }

  CONFIG(release, debug|release) {
    message(Release mode)
    DEFINES += NDEBUG NTRACE_BILDERBIKKEL
  }

  QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra

  unix {
    QMAKE_CXXFLAGS += -Werror
  }
}

exists(../../Libraries/Boost.pri) {
  include(../../Libraries/Boost.pri)
}
!exists(../../Libraries/Boost.pri) {
  win32 {
    INCLUDEPATH += \
      ../../../Projects/Libraries/boost_1_55_0
  }
}

SOURCES += main.cpp

RESOURCES += MyResources.qrc

 

 

 

 

 

./CppQtExample16/main.cpp

 

#include <cassert>

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#include <boost/shared_ptr.hpp>
#include <QApplication>
#include <QDialog>
#include <QLabel>
#include <QVBoxLayout>
#pragma GCC diagnostic pop

int main(int argc, char *argv[])
{
  QApplication a(argc, argv);

  //Load the resource in a pixmap
  const QPixmap pixmap(":/MyImages/BeerSmall.bmp");
  assert(!pixmap.isNull() && "Assume bitmap is found");

  //Put the pixmap in a label
  boost::shared_ptr<QLabel> label(new QLabel);
  label->setPixmap(pixmap);

  //Add label in a layout
  boost::shared_ptr<QVBoxLayout> layout(new QVBoxLayout);
  layout->addWidget( label.get() );

  //Create and show a window
  boost::shared_ptr<QDialog> dialog(new QDialog);
  dialog->setLayout(layout.get());
  dialog->show();

  return a.exec();
}

 

 

 

 

 

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