windowdragger.cpp

/*
###############################################################################
#                                                                             #
# The MIT License                                                             #
#                                                                             #
# Copyright (C) 2017 by Juergen Skrotzky (JorgenVikingGod@gmail.com)          #
#               >> https://github.com/Jorgen-VikingGod                        #
#                                                                             #
# Sources: https://github.com/Jorgen-VikingGod/Qt-Frameless-Window-DarkStyle  #
#                                                                             #
###############################################################################
*/

#include "windowdragger.h"
#include <QPainter>
#include <QStyleOption>

WindowDragger::WindowDragger(QWidget *parent) : QWidget(parent) {
  mousePressed = false;
}

void WindowDragger::mousePressEvent(QMouseEvent *event) {
  mousePressed = true;
  mousePos = event->globalPos();

  QWidget *parent = parentWidget();
  if (parent) parent = parent->parentWidget();

  if (parent) wndPos = parent->pos();
}

void WindowDragger::mouseMoveEvent(QMouseEvent *event) {
  QWidget *parent = parentWidget();
  if (parent) parent = parent->parentWidget();

  if (parent && mousePressed)
    parent->move(wndPos + (event->globalPos() - mousePos));
}

void WindowDragger::mouseReleaseEvent(QMouseEvent *event) {
  Q_UNUSED(event);
  mousePressed = false;
}

void WindowDragger::paintEvent(QPaintEvent *event) {
  Q_UNUSED(event);
  QStyleOption styleOption;
  styleOption.init(this);
  QPainter painter(this);
  style()->drawPrimitive(QStyle::PE_Widget, &styleOption, &painter, this);
}

void WindowDragger::mouseDoubleClickEvent(QMouseEvent *event) {
  Q_UNUSED(event);
  emit doubleClicked();
}