MouseObserver.cpp

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// ======================================================================
//  MouseObserver.h --
// ======================================================================
//                   This file is a part of the book 
//             "Qt 5.10 Professional programming with C++"
//                       http://qt-book.com
// ======================================================================
//  Copyright (c) 2017 by Max Schlee
// ======================================================================

#include "MouseObserver.h"

// ----------------------------------------------------------------------
MouseObserver::MouseObserver(QWidget* pwgt /*= 0*/) : QLabel(pwgt) 
{
    setAlignment(Qt::AlignCenter);
    setText("Mouse interactions\n(Press a mouse button)");
}   

// ----------------------------------------------------------------------
/*virtual*/void MouseObserver::mousePressEvent(QMouseEvent* pe)
{
    dumpEvent(pe, "Mouse Pressed");
}

// ----------------------------------------------------------------------
/*virtual*/void MouseObserver::mouseReleaseEvent(QMouseEvent* pe)
{
    dumpEvent(pe, "Mouse Released");
}
// ----------------------------------------------------------------------
/*virtual*/ void MouseObserver::mouseMoveEvent(QMouseEvent* pe)
{
    dumpEvent(pe, "Mouse Is Moving");
}

// ----------------------------------------------------------------------
void MouseObserver::dumpEvent(QMouseEvent* pe, const QString& strMsg)
{
    setText(strMsg
            + "\n buttons()=" + buttonsInfo(pe)
            + "\n x()=" + QString::number(pe->x())
            + "\n y()=" + QString::number(pe->y())
            + "\n globalX()=" + QString::number(pe->globalX())
            + "\n globalY()=" + QString::number(pe->globalY())
            + "\n modifiers()=" + modifiersInfo(pe)
           );
}

// ----------------------------------------------------------------------
QString MouseObserver::modifiersInfo(QMouseEvent* pe)
{
    QString strModifiers;

    if(pe->modifiers() & Qt::ShiftModifier) {
        strModifiers += "Shift ";
    }
    if(pe->modifiers() & Qt::ControlModifier) {
        strModifiers += "Control ";
    }
    if(pe->modifiers() & Qt::AltModifier) {
        strModifiers += "Alt";
    }
    return strModifiers;
}

// ----------------------------------------------------------------------
QString MouseObserver::buttonsInfo(QMouseEvent* pe)
{
    QString strButtons;

    if(pe->buttons() & Qt::LeftButton) {
        strButtons += "Left ";
    }
    if(pe->buttons() & Qt::RightButton) {
        strButtons += "Right ";
    }
    if(pe->buttons() & Qt::MidButton) {
        strButtons += "Middle";
    }
    return strButtons;        
}