Method startManualPress

app/src/UI/WindowManager.cpp:1881–1941

* @brief Manual-mode press logic: hit-tests the topmost window at pos, raises it, * and starts a resize or drag. Returns true when the press is consumed. */

 *        and starts a resize or drag. Returns true when the press is consumed.
 */
bool UI::WindowManager::startManualPress(const QPointF& pos, Qt::MouseButton button)
{
  if (autoLayoutEnabled())
    return false;

  m_dragWindow      = nullptr;
  m_targetWindow    = nullptr;
  m_resizeWindow    = nullptr;
  m_focusedWindow   = nullptr;
  m_resizeEdge      = ResizeEdge::None;
  m_initialMousePos = pos.toPoint();

  m_focusedWindow = manualResizeTargetAt(m_initialMousePos);
  if (!m_focusedWindow)
    m_focusedWindow = topmostWindowAt(m_initialMousePos);

  if (!m_focusedWindow)
    return false;

  const bool wasFocused = m_taskbar && m_taskbar->activeWindow() == m_focusedWindow;

  if (m_taskbar)
    m_taskbar->setActiveWindow(m_focusedWindow);

  bringToFront(m_focusedWindow);

  if (button != Qt::LeftButton || m_focusedWindow->state() != "normal")
    return false;

  m_resizeEdge = detectResizeEdge(m_focusedWindow, m_initialMousePos);
  if (m_resizeEdge != ResizeEdge::None) {
    m_resizeWindow    = m_focusedWindow;
    m_initialGeometry = extractGeometry(m_focusedWindow);
    grabMouse();
    return true;
  }

  const auto local     = m_focusedWindow->mapFromItem(this, m_initialMousePos);
  const int captionH   = m_focusedWindow->property("captionHeight").toInt();
  const int externcW   = m_focusedWindow->property("externControlWidth").toInt();
  const int buttonsW   = m_focusedWindow->property("windowControlsWidth").toInt();
  const bool onCaption = local.y() <= captionH && local.x() > externcW
                      && local.x() <= m_focusedWindow->width() - buttonsW;
  const bool onControls = local.y() <= captionH && !onCaption;
  if (onControls)
    return false;

  if (wasFocused && local.y() > captionH)
    return false;

  m_dragWindow      = m_focusedWindow;
  m_initialGeometry = extractGeometry(m_focusedWindow);
  if (m_snapIndicatorVisible) {
    m_snapIndicatorVisible = false;
    Q_EMIT snapIndicatorChanged();
  }

  grabMouse();