Resizing problems, dragging when it is not allowed

[Krakenus00]

Hello, I am creating a borderless resizable window. I have constraints for minimum size and trying to prevent a user from any making the window smaller than it is allowed to be. But when I press LMB on the border when the window is at the minimum size and try to make it slightly smaller, it is being dragged. I can drag my window for about 11-15 px per one attempt. If I drag it a bit more than 11-15px, it jumps to the proper position. I checked my code with a debugger and it sets the proper values, however, the window is still being dragged.
So I have the next code:

void CustomizableWindow::mousePressEvent(QMouseEvent* event)
{
	if (isMaximized())
		return;
	m_bMousePressed = true;
	m_bCanChangeCursor = false;
	m_StartGeometry = this->geometry();
}

bool CustomizableWindow::eventFilter(QObject* obj, QEvent* event)
{
	if (!isMaximized())
	{
		// Check mouse moving
		if (event->type() == QEvent::MouseMove)
		{
			QMouseEvent* pMouse = dynamic_cast<QMouseEvent*>(event);
			if (pMouse)
			{
				if (!m_bMousePressed)
					checkMousePos(pMouse->globalPos());
				else checkBorderDragging(pMouse);
			}
		}

		// Check mouse pressing on frame
		else if (event->type() == QEvent::MouseButtonPress && obj == this)
		{
			QMouseEvent* pMouse = dynamic_cast<QMouseEvent*>(event);
			if (pMouse)
				mousePressEvent(pMouse);
		}
		....
	}
	return QWidget::eventFilter(obj, event);
}

void CustomizableWindow::checkBorderDragging(QMouseEvent* event)
{
	if (isMaximized())
		return;

	QPoint globalMousePos = event->globalPos();
	if (m_bMousePressed)
	{
		QRect newGeometry = m_StartGeometry;
		calculateDragging(newGeometry, globalMousePos);
		setGeometry(newGeometry);
		m_StartGeometry = newGeometry;
	}
}

void CustomizableWindow::calculateDragging(QRect& windowGeometry, const QPoint& globalMousePos)
{
	int horDiff = 0, verDiff = 0;
	int newX = windowGeometry.x(), newY = windowGeometry.y();

	// Calculate difference
	if (m_bDragLeft)
	{
		horDiff = windowGeometry.x() - globalMousePos.x();
		newX = globalMousePos.x();
	}
	else if (m_bDragRight)
	{
		horDiff = globalMousePos.x() - (windowGeometry.x() + windowGeometry.width());
	}
	if (m_bDragTop)
	{
		verDiff = windowGeometry.y() - globalMousePos.y();
		newY = globalMousePos.y();
	}
	else if (m_bDragBottom)
	{
		verDiff = globalMousePos.y() - (windowGeometry.y() + windowGeometry.height());
	}

	// Calculate new size
	int newWidth = windowGeometry.width() + horDiff;
	int newHeight = windowGeometry.height() + verDiff;

	// Check if all is good
	if (newWidth < WIND_MIN_W)
	{
		newWidth = WIND_MIN_W;
		newX = windowGeometry.x();
	}
	if (newHeight < WIND_MIN_H)
	{
		newHeight = WIND_MIN_H;
		newY = windowGeometry.y();
	}

	// Set new values
	windowGeometry.setX(newX);
	windowGeometry.setY(newY);
	windowGeometry.setWidth(newWidth);
	windowGeometry.setHeight(newHeight);
}

[mrjj]

Hi
so
SetMinimumSize()
Is not honored when one is doing custom resizing + boderless ?

[Krakenus00]

SetMinimumSize() does not work for me. I think it is because I change the window's position. However, the problem was in my form file. For an unknown reason, it changed the window's size to 802x600 when I was checking for 800x600. Maybe there was some another way out, but now all works just fine.