// draggabletoolbutton.cpp
#include "draggabletoolbutton.h"
#include <QMouseEvent>
#include <QApplication>
#include <QDebug>

DraggableToolButton::DraggableToolButton(QWidget *parent)
    : QToolButton(parent)
    , m_dragEnabled(true)
    , m_isDragging(false)
{
    setMouseTracking(true);
}

void DraggableToolButton::setDragEnabled(bool enabled)
{
    m_dragEnabled = enabled;
}

bool DraggableToolButton::dragEnabled() const
{
    return m_dragEnabled;
}

void DraggableToolButton::setToolData(const QString &data)
{
    m_toolData = data;
}

QString DraggableToolButton::toolData() const
{
    return m_toolData;
}

void DraggableToolButton::mousePressEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton && m_dragEnabled) {
        m_pressPos = event->pos();
        m_isDragging = false;
    }

    // 不调用基类，完全自己处理
    event->accept();
}

void DraggableToolButton::mouseMoveEvent(QMouseEvent *event)
{
    if (!m_dragEnabled || !(event->buttons() & Qt::LeftButton)) {
        event->ignore();
        return;
    }

    // 检查是否达到拖拽阈值
    int moveDist = (event->pos() - m_pressPos).manhattanLength();
    if (moveDist >= QApplication::startDragDistance()) {
        if (!m_isDragging) {
            m_isDragging = true;
            emit dragStarted(m_toolData, event->globalPosition().toPoint());
        }
    }

    event->accept();
}

void DraggableToolButton::mouseReleaseEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton) {
        if (!m_isDragging) {
            // 没有拖拽，是点击
            emit clicked();
        }
        m_isDragging = false;
    }

    event->accept();
}