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(C++) QtExample24

 

QtQt CreatorLubuntuUbuntu

 

Qt example 24: create a simple text positioning widget is a Qt Example that uses QGraphicsView to create a simple text positioning widget: in the constructor the different std::strings are specified, upon which the widget puts these overlapping in the center. Then, the std::strings can dragged.

 

 

 

 

 

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Qt project file: ./CppQtExample24/CppQtExample24.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 += \
    qtmain.cpp \
    tooltesttextpositionwidgetdialog.cpp \
    qttextpositionwidget.cpp

HEADERS += \
    tooltesttextpositionwidgetdialog.h \
    qttextpositionwidget.h

FORMS += tooltesttextpositionwidgetdialog.ui

 

 

 

 

 

./CppQtExample24/qtmain.cpp

 

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#include <QApplication>
#include "tooltesttextpositionwidgetdialog.h"
#pragma GCC diagnostic pop

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

 

 

 

 

 

./CppQtExample24/qttextpositionwidget.h

 

#ifndef QTTEXTPOSITIONWIDGET_H
#define QTTEXTPOSITIONWIDGET_H

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#include <QGraphicsView>
#pragma GCC diagnostic pop

struct QtTextPositionWidget : public QGraphicsView
{
  QtTextPositionWidget(const std::vector<std::string>& items);
};

#endif // QTTEXTPOSITIONWIDGET_H

 

 

 

 

 

./CppQtExample24/qttextpositionwidget.cpp

 

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#include <cassert>
#include <QGraphicsScene>
#include <QGraphicsTextItem>
#include "qttextpositionwidget.h"
#pragma GCC diagnostic pop

QtTextPositionWidget::QtTextPositionWidget(const std::vector<std::string>& items)
{
  QGraphicsScene * const scene = new QGraphicsScene(this);
  this->setScene(scene);

  std::for_each(items.begin(),items.end(),
    [this,scene](const std::string& s)
    {
      QGraphicsTextItem * item = new QGraphicsTextItem;
      item->setPlainText(s.c_str());
      item->setFlags(QGraphicsItem::ItemIsMovable);
      item->setPos(this->width() / 2.0, this->height() / 2.0);
      scene->addItem(item);
    }
  );
}

 

 

 

 

 

./CppQtExample24/tooltesttextpositionwidgetdialog.h

 

#ifndef TOOLTESTTEXTPOSITIONWIDGETDIALOG_H
#define TOOLTESTTEXTPOSITIONWIDGETDIALOG_H

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#include <QDialog>
#pragma GCC diagnostic pop

namespace Ui {
  class ToolTestTextPositionWidgetDialog;
}

class ToolTestTextPositionWidgetDialog : public QDialog
{
  Q_OBJECT
    
public:
  explicit ToolTestTextPositionWidgetDialog(QWidget *parent = 0);
  ToolTestTextPositionWidgetDialog(const ToolTestTextPositionWidgetDialog&) = delete;
  ToolTestTextPositionWidgetDialog& operator=(const ToolTestTextPositionWidgetDialog&) = delete;
  ~ToolTestTextPositionWidgetDialog();
    
private:
  Ui::ToolTestTextPositionWidgetDialog *ui;
};

#endif // TOOLTESTTEXTPOSITIONWIDGETDIALOG_H

 

 

 

 

 

./CppQtExample24/tooltesttextpositionwidgetdialog.cpp

 

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#include "qttextpositionwidget.h"
#include "tooltesttextpositionwidgetdialog.h"
#include "ui_tooltesttextpositionwidgetdialog.h"
#pragma GCC diagnostic pop

ToolTestTextPositionWidgetDialog::ToolTestTextPositionWidgetDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::ToolTestTextPositionWidgetDialog)
{
  ui->setupUi(this);
  ui->layout->addWidget(new QtTextPositionWidget( { "A", "B", "C", "D", "E", "F" } ));
}

ToolTestTextPositionWidgetDialog::~ToolTestTextPositionWidgetDialog()
{
  delete ui;
}

 

 

 

 

 

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