#include "WindowAppPouView.h"
#include "WindowAppPouScene.h"
#include "DragMimeData.h"
#include "WindowAppTreeTool.h"
#include "WindowAppPouFrame.h"
#include "VPCommand.h"
#include "Pou.h"

WindowAppPouView::WindowAppPouView(QWidget* parent /*= nullptr*/)
	: QGraphicsView()
	, m_pPouScene(nullptr)
{
	this->setParent(parent);
	this->m_fZoom = 0;
	this->m_pBkImage = nullptr;
}


/// <summary>
/// 初始化
/// </summary>
void WindowAppPouView::initView(const QString& strGroup, QWidget* pParent)
{
	// 设置为可接收拖拽
	this->setAcceptDrops(true);
	//// 设置视图的重绘方式（默认也是这种方式）
	//this->setViewportUpdateMode(QGraphicsView::MinimalViewportUpdate);

	// 取消滚动条
	//this->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	//this->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

	// 绘图窗口的场景类
	// 2022-1-8 修改，此处将父控件WindowAppPouView*传递给Scene，用于实现点击调用函数
	m_pPouScene = new WindowAppPouScene(strGroup, this, pParent);

	// 设置为固定大小
	// 将自身设置得比scene略大，防止出现滚动条
	this->resize(POU_VIEW_WIDTH + 1, POU_VIEW_HEIGHT + 1);
	m_pPouScene->setSceneRect(QRectF(0, 0, POU_VIEW_WIDTH, POU_VIEW_HEIGHT));
	this->setScene(m_pPouScene);

	// 由于默认是居中显示，此处需要设置为默认左上角显示
	this->centerOn(0, 0);

	// 防止窗口中的对象拖尾
	this->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);

	// 初始化方格背景
	this->initBkImage();

	//设置橡皮筋选择选项
	this->setDragMode(QGraphicsView::RubberBandDrag);

	// 设置抗锯齿（解决link 拖拽的时候，预览线有锯齿）
	this->setRenderHint(QPainter::Antialiasing, true);

	// 初始化与Zoom相关操作
	this->initZoom();
}


/// <summary>
/// 初始化与缩放相关的操作
/// </summary>
void WindowAppPouView::initZoom()
{
	//用于缩放视图的滑动条
	QSlider* slider = new QSlider;
	slider->setOrientation(Qt::Horizontal);
	slider->setRange(1, 100);
	slider->setTickInterval(10);
	slider->setValue(50);
	slider->setMaximumSize(80, 20);
	connect(slider, SIGNAL(valueChanged(int)), this, SLOT(slotZoom(int)));


	QGridLayout* gridLayout = new QGridLayout(this);

	QSpacerItem* horizontalSpacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
	gridLayout->addItem(horizontalSpacer, 1, 0, 1, 1);
	QSpacerItem* verticalSpacer = new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding);


	gridLayout->addItem(verticalSpacer, 0, 0, 1, 1);
	m_pZooomLabel = new QLabel();
	m_pZooomLabel->setText("Zoom  0   ");
	gridLayout->addWidget(slider, 1, 1, 1, 1);
	gridLayout->addWidget(m_pZooomLabel, 1, 2, 1, 1);

	setLayout(gridLayout);

	m_fZoom = 50;

	connect(horizontalScrollBar(), &QScrollBar::valueChanged, this, &WindowAppPouView::viewportRectChanged);
	connect(verticalScrollBar(), &QScrollBar::valueChanged, this, &WindowAppPouView::viewportRectChanged);
}
//
//#include "LoadingManager.h"
//void myFunction()
//{
//	Utility::qSleep(10000);
//
//	qDebug() << "myFunction finished";
//
//	emit g_pLoadingManager->sigLoadingFinished();
//}


/// <summary>
/// 在拖拽事件中获取拖动进来的工具信息
/// </summary>
/// <param name="event"></param>
void WindowAppPouView::dropEvent(QDropEvent* event)
{
	// 确定是从树形控件拖拽来的
	WindowAppTreeTool* source = qobject_cast<WindowAppTreeTool*>(event->source());
	if (source)
	{
		const DragMimeData* pMimeData = (const DragMimeData*)(event->mimeData());

		// 确认MimeData中有对应的数据字段
		if (pMimeData->hasFormat(FORMAT_DRAG_TOOL))
		{
			// 取出拖动的工具信息
			const STATIC_TOOL* pDragTool = pMimeData->DragItemData();

			// 2021/4/17 处理了一个拖动tool为空的bug
			if (pDragTool == nullptr)
			{
				return;
			}

			//// 取出节点信息
			//qDebug() << pDragTool->strName;

			qDebug() << "[TOOL] Drag " << pDragTool->strName << " to WindowAppDiagramView.";

			// 按照拖动的工具信息在Pou中进行创建对应的运行时工具
			// ((WindowAppPouScene*)this->scene())->addNewItem(pDragTool, mapToScene( event->pos()));

			// 2022-10-1，将Pou工具的添加整合进Undo体系
			PouToolAddCommand* toolAddCommand = new PouToolAddCommand((WindowAppPouScene*)this->scene(), pDragTool, mapToScene(event->pos()));
			((WindowAppPouScene*)scene())->m_CommandManager.executeCommand(toolAddCommand);

			//emit g_pLoadingManager->sigLoading();

			//QFuture<void> future = QtConcurrent::run(myFunction);

			//while (true)
			//{
			//	QCoreApplication::processEvents();

			//	if (future.isFinished())
			//	{
			//		break;
			//	}

			//	Utility::qSleep(100);
			//}

			//emit g_pLoadingManager->sigLoadingFinished();

		}

		event->accept();
	}
}


/// <summary>
/// 拖拽动作处理
/// </summary>
/// <param name="event"></param>
void WindowAppPouView::dragMoveEvent(QDragMoveEvent* event)
{
	// 只接收从toolTree的拖动操作
	WindowAppTreeTool* source = qobject_cast<WindowAppTreeTool*> (event->source());

	if (source)
	{
		event->acceptProposedAction();
		event->accept();
	}
}


///// <summary>
///// 直接添加Tool功能块（from序列化文件）
///// </summary>
///// <param name="newTool"></param>
//void WindowAppPouView::addToolDirectly(TOOL* newTool, QPointF pos)
//{
//	((WindowAppPouScene*)this->scene())->addNewItem(newTool, pos, true);
//}


///// <summary>
///// 在界面中添加新的Link（from序列化文件）
///// </summary>
///// <param name="strStartInf"></param>
///// <param name="strEndInf"></param>
//void WindowAppPouView::addLinkDirectly(const QString& strStartInf, const QString& strEndInf, LINK_MODE linkMode)
//{
//	((WindowAppPouScene*)this->scene())->addLink(strStartInf, strEndInf, linkMode);
//}


/// <summary>
/// 在界面中添加棋盘格背景
/// </summary>
/// <param name="painter"></param>
/// <param name="rect"></param>
void WindowAppPouView::drawBackground(QPainter* painter, const QRectF& rect)
{
	if (m_pBkImage)
	{
		painter->drawTiledPixmap(rect, *m_pBkImage);
	}
}


/// <summary>
/// 自动缩放
/// </summary>
/// <param name="resizeEvent"></param>
void WindowAppPouView::resizeEvent(QResizeEvent* resizeEvent)
{
	Q_UNUSED(resizeEvent);

	//QRect rect = this->geometry();
	//m_pDiagramScene->setSceneRect(0, 0, rect.width(), rect.height());
	emit navigatorViewRequired(true, transform());
}


void WindowAppPouView::slotZoom(int value)
{
	qreal scaleFactor;
	if (value > m_fZoom)//放大
	{
		scaleFactor = pow(1.05, (value - m_fZoom));
	}
	else {
		scaleFactor = pow(1 / 1.05, (m_fZoom - value));
	}
	scale(scaleFactor, scaleFactor);
	m_fZoom = value;

	QString strZoom = "Zoom " + QString::number(value - 50) + "   ";
	m_pZooomLabel->setText(strZoom);

	emit navigatorViewRequired(true , transform());
}


/// <summary>
/// 初始化方格背景
/// </summary>
void WindowAppPouView::initBkImage()
{
	m_pBkImage = new QPixmap(16, 16);
	QColor color1(60, 60, 60);
	QColor color2(45, 45, 45);
	m_pBkImage->fill(color1);
	QPainter painter1(m_pBkImage);
	painter1.fillRect(0, 0, 8, 8, color2);
	painter1.fillRect(8, 8, 8, 8, color2);
	painter1.end();
}