SmartPDCode/Qt/Qt_Test_Pro_5inch/mousemovewidget.cpp

#include "mousemovewidget.h"
#include <QMouseEvent>
MouseMoveWidget::MouseMoveWidget(QWidget *parent) : QWidget(parent),m_pMouseStart(0,0),m_pHScrollBar(nullptr),m_pVScrollBar(nullptr)
{

}

void MouseMoveWidget::SetScrollBar(QScrollBar *pHScrollBar, QScrollBar *pVScrollBar)
{
    m_pHScrollBar=pHScrollBar;
    m_pVScrollBar=pVScrollBar;
}

void MouseMoveWidget::mouseMoveEvent(QMouseEvent *event)
{
    if (event->buttons()&Qt::MouseButton::LeftButton)
    {
        QPoint delta = m_pMouseStart - event->pos();
        if(m_pHScrollBar)
        {
            int hValue =m_pHScrollBar->value();
            m_pHScrollBar->setValue(delta.x() + hValue);
        }
        if(m_pVScrollBar)
        {
            int vValue = m_pVScrollBar->value();
            m_pVScrollBar->setValue(delta.y() + vValue);
        }
        m_pMouseStart = event->pos();
    }
}

void MouseMoveWidget::mousePressEvent(QMouseEvent *event)
{
    if (event->buttons() & Qt::MouseButton::LeftButton)
    {
        m_pMouseStart = event->pos();
    }
    QWidget::mousePressEvent(event);
}