#include "WindowAppBlockComment.h"
#include "DialogEditComment.h"
#include <QAbstractTextDocumentLayout>


WindowAppBlockComment::WindowAppBlockComment(QGraphicsItem* parent)
	: QGraphicsTextItem(parent)
	, m_bSel(false)
	, m_strComment(COMM_DEFAULT_TEXT)
	, resizing(false)
{
	// 初始化UI风格
	this->initStyle();

	// 设置注释控件的默认宽度
	blockRect.setRect(
		0,
		0,
		COMM_BASIC_WIDTH,
		COMM_BASIC_HEIGHT
	);

	// 更新矩形区域的尺寸
	this->updateRect();

	reDirection = ResizeNone;
}

WindowAppBlockComment::~WindowAppBlockComment()
{
}


/// <summary>
/// 初始化UI风格
/// </summary>
void WindowAppBlockComment::initStyle()
{
	// 允许移动
	setFlag(QGraphicsItem::ItemIsMovable);
	// 允许选中
	setFlag(QGraphicsItem::ItemIsSelectable);
	// 允许发送尺寸变更通知
	setFlag(QGraphicsItem::ItemSendsGeometryChanges);

	// 设置字体
	this->setFont(FONT_COMM);
	// 设置文字颜色
	this->setDefaultTextColor(COLOR_COMM_TEXT);

	// 允许文字交互
	this->setTextInteractionFlags(Qt::TextEditorInteraction);

	// 置于最底层
	this->setZValue(1000.0);

	// 设置默认注释文本
	this->setPlainText(m_strComment);

	// 设置其他参数（左上角对齐，文字最大宽度等等）
	auto document = this->document();
	auto option = document->defaultTextOption();
	option.setAlignment(Qt::AlignLeft | Qt::AlignTop);
	document->setDefaultTextOption(option);
	//this->setTextWidth(110);

	

	// 绑定文本变更信号，自动调整边距
	connect(this->document(), SIGNAL(contentsChanged()), this, SLOT(onContentsChanged()));

}



///// <summary>
///// 设置注释的文字
///// </summary>
///// <param name="strComm"></param>
//void WindowAppBlockComment::setComment(const QString& strComm)
//{
//	this->m_strComment = strComm;
//}


/// <summary>
/// 绘制注释功能块
/// </summary>
/// <param name="painter"></param>
/// <param name="option"></param>
/// <param name="widget"></param>
void WindowAppBlockComment::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
	m_bSel = isSelected();

	painter->setRenderHints(QPainter::HighQualityAntialiasing | QPainter::TextAntialiasing);

	painter->save();

	// 绘制边框
	this->drawFrame(painter);

	paintSelected(painter, 1);

	//// 绘制文字
	//this->drawContent(painter);

	painter->restore();

	// 去掉黑色虚线框
	//QStyleOptionGraphicsItem op(*option);
	//op.state = QStyle::State_None;
	//QGraphicsTextItem::paint(painter, &op, widget);


		//// 编辑状态按原来的执行
		//if (hasFocus())
		//{
		//	QItem::paint(painter, option, widget);
		//}
		//// 选中状态去掉虚线
		//else
		//{
		//	// 原来什么属性就要什么属性,只不过去掉多余的选中状态
		//	QStyleOptionGraphicsItem optionx(*option);
		//	optionx.state &= ~QStyle::State_Selected;
		//	QItem::paint(painter, &optionx, widget);
		//}



	QGraphicsTextItem::paint(painter, option, widget);
}


QVariant WindowAppBlockComment::itemChange(GraphicsItemChange change,
	const QVariant& value)
{
	if (change == QGraphicsItem::ItemSelectedHasChanged)
	{
		emit selectedChange(this);
	}

	return value;
}


void WindowAppBlockComment::focusOutEvent(QFocusEvent* event)
{
	setTextInteractionFlags(Qt::NoTextInteraction);
	emit lostFocus(this);
	QGraphicsTextItem::focusOutEvent(event);
}


/// <summary>
/// 在文本内容变更时触发，自动更新边距
/// </summary>
void WindowAppBlockComment::onContentsChanged()
{
	// 有内容变更时，更新一下外边界
	this->updateRect();
	this->update();
}


/// <summary>
/// 响应双击事件，激活文本编辑模式
/// </summary>
/// <param name="event"></param>
void WindowAppBlockComment::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event)
{
	if (event->button() == Qt::LeftButton && textInteractionFlags() == Qt::NoTextInteraction)
	{
		setTextInteractionFlags(Qt::TextEditorInteraction);
	}

	QGraphicsTextItem::mouseDoubleClickEvent(event);
}


/// <summary>
/// 绘制边框
/// </summary>
/// <param name="painter"></param>
void WindowAppBlockComment::drawFrame(QPainter* painter)
{
	//if (!m_bSel)
	//{
	//	painter->setPen(QPen(COLOR_TBD_FRAME1, PEN_LINE_WIDTH));
	//}
	//else
	//{
	//	painter->setPen(QPen(COLOR_TBD_FRAME1, PEN_LINE_WIDTH_SEL));
	//}


	// 设置画笔
	painter->setPen(QPen(COLOR_COMM_FRAME, PEN_WIDTH_FRAME));
	// 设置透明
	//painter->setBrush(Qt::transparent);
	// 绘制边框
	painter->drawRoundedRect(blockRect, 10, 10);

}


/// <summary>
/// 更新矩形区域的尺寸
/// </summary>
void WindowAppBlockComment::updateRect()
{
	m_strComment = this->toPlainText();

	// Reason：由于将 boundingRect 强制设定成了和 blockRect 一样的大小(方便做拉伸)，
	// 所以在有文字内容变动的时候，需要手动扩大一下矩形区域
	QRectF textRect = QFontMetrics(FONT_COMM).boundingRect(m_strComment);
	float xFix = textRect.width() - blockRect.width();
	float yFix = textRect.height() - blockRect.width();

	if (xFix > 0.0)
	{
		blockRect.setRight(blockRect.right() + xFix);
	}
	if (yFix > 0.0)
	{
		blockRect.setBottom(blockRect.bottom() + yFix);
	}



	//blockBoundingRect = boundingRect();

	//if (blockBoundingRect.width() > blockRect.width())
	//{
	//	blockRect.setWidth(blockBoundingRect.width());

	//	// 然后微调一下外边框，方便拖放操作
	//	blockRect.adjust(0, 0, 2, 0);
	//}

	//if (blockBoundingRect.height() > blockRect.height())
	//{
	//	blockRect.setHeight(blockBoundingRect.height());

	//	// 然后微调一下外边框，方便拖放操作
	//	blockRect.adjust(0, 0, 0, 2);
	//}

}


//void WindowAppBlockComment::hoverEnterEvent(QGraphicsSceneHoverEvent* event)
//{
//	update();
//	QGraphicsObject::hoverEnterEvent(event);
//}
//
//
//void WindowAppBlockComment::hoverLeaveEvent(QGraphicsSceneHoverEvent* event)
//{
//	setCursor(QCursor(Qt::ArrowCursor));
//	scene()->update(sceneBoundingRect());
//	update();
//	QGraphicsObject::hoverLeaveEvent(event);
//}

void WindowAppBlockComment::hoverMoveEvent(QGraphicsSceneHoverEvent* event)
{
	if (this->isSelected())
	{
		QPointF mousePoint = event->pos();
		QPointF mouseHandler = QPointF(5, 5);
		QPointF topLeft = blockRect.topLeft();
		QPointF topRight = blockRect.topRight();
		QPointF bottomLeft = blockRect.bottomLeft();
		QPointF bottomRight = blockRect.bottomRight();

		// resize top
		if (mousePoint.x() >= (topLeft.x() + mouseHandler.x()) &&
			mousePoint.x() <= (topRight.x() - mouseHandler.x()) &&
			mousePoint.y() >= (topLeft.y() - mouseHandler.y()) &&
			mousePoint.y() <= (topLeft.y() + mouseHandler.y())) {
			setCursor(Qt::SizeVerCursor);
		}
		// resize bottom
		else if (mousePoint.x() >= (bottomLeft.x() + mouseHandler.x()) &&
			mousePoint.x() <= (bottomRight.x() - mouseHandler.x()) &&
			mousePoint.y() >= (bottomLeft.y() - mouseHandler.y()) &&
			mousePoint.y() <= (bottomLeft.y() + mouseHandler.y())) {
			setCursor(Qt::SizeVerCursor);
		}
		// resize left
		else if (mousePoint.x() >= (topLeft.x() - mouseHandler.x()) &&
			mousePoint.x() <= (topLeft.x() + mouseHandler.x()) &&
			mousePoint.y() >= (topLeft.y() + mouseHandler.y()) &&
			mousePoint.y() <= (bottomLeft.y() - mouseHandler.y())) {
			setCursor(Qt::SizeHorCursor);
		}
		// resize right
		else if (mousePoint.x() >= (topRight.x() - mouseHandler.x()) &&
			mousePoint.x() <= (topRight.x() + mouseHandler.x()) &&
			mousePoint.y() >= (topRight.y() + mouseHandler.y()) &&
			mousePoint.y() <= (bottomRight.y() - mouseHandler.y())) {
			setCursor(Qt::SizeHorCursor);
		}
		// resize top left
		else if (mousePoint.x() <= (topLeft.x() + mouseHandler.x()) &&
			mousePoint.x() >= (topLeft.x() - mouseHandler.x()) &&
			mousePoint.y() <= (topLeft.y() + mouseHandler.y()) &&
			mousePoint.y() >= (topLeft.y() - mouseHandler.y())) {
			setCursor(Qt::SizeFDiagCursor);
		}
		// resize bottom right
		else if (mousePoint.x() <= (bottomRight.x() + mouseHandler.x()) &&
			mousePoint.x() >= (bottomRight.x() - mouseHandler.x()) &&
			mousePoint.y() <= (bottomRight.y() + mouseHandler.y()) &&
			mousePoint.y() >= (bottomRight.y() - mouseHandler.y())) {
			setCursor(Qt::SizeFDiagCursor);
		}
		// resize bottom left
		else if (mousePoint.x() <= (bottomLeft.x() + mouseHandler.x()) &&
			mousePoint.x() >= (bottomLeft.x() - mouseHandler.x()) &&
			mousePoint.y() >= (bottomLeft.y() - mouseHandler.y()) &&
			mousePoint.y() <= (bottomLeft.y() + mouseHandler.y())) {
			setCursor(Qt::SizeBDiagCursor);
		}
		// resize top right
		else if (mousePoint.x() <= (topRight.x() + mouseHandler.x()) &&
			mousePoint.x() >= (topRight.x() - mouseHandler.x()) &&
			mousePoint.y() >= (topRight.y() - mouseHandler.y()) &&
			mousePoint.y() <= (topRight.y() + mouseHandler.y())) {
			setCursor(Qt::SizeBDiagCursor);
		}
		else {
			setCursor(Qt::ArrowCursor);
		}
	}
	QGraphicsObject::hoverMoveEvent(event);
}

void WindowAppBlockComment::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
{
	//if (!isSelected()) 
	//{

	//	return;
	//}

	QPointF mousePoint = event->pos();

	if (resizing)
	{
		QTextDocument* doc = this->document();
		QAbstractTextDocumentLayout* layout = doc->documentLayout();
		//int pixelsWidth = layout->documentSize().width();
		//int pixelsHeight = layout->documentSize().height();

		//qDebug() << "layout: " << pixelsWidth << "," << pixelsHeight;

		

		if (reDirection & ResizeLeft)
		{
			blockRect.setLeft(mousePoint.x());
			//setElementXPos(static_cast<int>(mapToScene(blockRect.topLeft()).x()));
			//setElementWidth(static_cast<int>(qAbs(mapToScene(blockRect.topLeft()).x() - mapToScene(blockRect.topRight()).x())));

			// document->setDocumentLayout()

			//QSizeF size(200, 200);
			//doc->setPageSize(size);
		}

		if (reDirection & ResizeRight)
		{
			blockRect.setRight(mousePoint.x());
			//setElementWidth(static_cast<int>(qAbs(mapToScene(blockRect.topLeft()).x() - mapToScene(blockRect.topRight()).x())));
		}

		if (reDirection & ResizeTop)
		{
			blockRect.setTop(mousePoint.y());
			//setElementYPos(static_cast<int>(mapToScene(blockRect.topLeft()).y()));
			//setElementHeight(static_cast<int>(qAbs(mapToScene(blockRect.topLeft()).y() - mapToScene(blockRect.bottomLeft()).y())));
		}

		if (reDirection & ResizeBottom)
		{
			blockRect.setBottom(mousePoint.y());
			// setElementHeight(static_cast<int>(qAbs(blockRect.topLeft().y() - blockRect.bottomLeft().y())));
		}

		scene()->update();

		

		return;
	}




	QGraphicsItem::mouseMoveEvent(event);

}

void WindowAppBlockComment::mousePressEvent(QGraphicsSceneMouseEvent* event)
{
	QPointF mousePoint = event->pos();
	QPointF mouseHandler = QPointF(5, 5);
	QPointF topLeft = blockRect.topLeft();
	QPointF topRight = blockRect.topRight();
	QPointF bottomLeft = blockRect.bottomLeft();
	QPointF bottomRight = blockRect.bottomRight();

	reDirection = ResizeNone;
	resizing = false;

	// resize top
	if (mousePoint.x() >= (topLeft.x() + 0) &&
		mousePoint.x() <= (topRight.x() - 0) &&
		mousePoint.y() >= (topLeft.y() - mouseHandler.y()) &&
		mousePoint.y() <= (topLeft.y() + mouseHandler.y())) {
		reDirection |= ResizeTop;
		resizing = true;
	}

	// resize bottom
	if (mousePoint.x() >= (bottomLeft.x() + 0) &&
		mousePoint.x() <= (bottomRight.x() - 0) &&
		mousePoint.y() >= (bottomLeft.y() - mouseHandler.y()) &&
		mousePoint.y() <= (bottomLeft.y() + mouseHandler.y())) {
		reDirection |= ResizeBottom;
		resizing = true;
	}

	// resize left
	if (mousePoint.x() >= (topLeft.x() - mouseHandler.x()) &&
		mousePoint.x() <= (topLeft.x() + mouseHandler.x()) &&
		mousePoint.y() >= (topLeft.y() + 0) &&
		mousePoint.y() <= (bottomLeft.y() - 0)) {
		reDirection |= ResizeLeft;
		resizing = true;
	}

	// resize right
	if (mousePoint.x() >= (topRight.x() - mouseHandler.x()) &&
		mousePoint.x() <= (topRight.x() + mouseHandler.x()) &&
		mousePoint.y() >= (topRight.y() + 0) &&
		mousePoint.y() <= (bottomRight.y() - 0)) {
		reDirection |= ResizeRight;
		resizing = true;
	}

	switch (reDirection)
	{
	case ResizeRight:
	case ResizeLeft:
		setCursor(Qt::SizeHorCursor);
		break;
	case ResizeBottom:
	case ResizeTop:
		setCursor(Qt::SizeVerCursor);
		break;
	case ResizeRight | ResizeBottom:
	case ResizeLeft | ResizeTop:
		setCursor(Qt::SizeFDiagCursor);
		break;
	case ResizeLeft | ResizeBottom:
	case ResizeRight | ResizeTop:
		setCursor(Qt::SizeBDiagCursor);
		break;
	default:
		setCursor(Qt::ArrowCursor);
		break;
	}

	oldPos = pos();
	oldWidth = blockRect.width();
	oldHeight = blockRect.height();

	QGraphicsObject::mousePressEvent(event);
}


void WindowAppBlockComment::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
{
	setCursor(Qt::ArrowCursor);
	//elementXPos = static_cast<int>(pos().x());
	//elementYPos = static_cast<int>(pos().y());
	//updatePropertyModel();

	//if (oldPos != pos()) 
	//{
	//	emit elementMoved(oldPos);
	//}

	//if (resizing) 
	//{
	//	emit elementResized(oldWidth, oldHeight, oldPos);
	//}
	resizing = false;
	reDirection = ResizeNone;

	QGraphicsObject::mouseReleaseEvent(event);
}

/**
 * @brief Element::paintSelected
 * @details 绘制选中状态
 * @param painter
 * @param iLineWidth 线宽
 */
void WindowAppBlockComment::paintSelected(QPainter* painter, int iLineWidth)
{
	if (isSelected())
	{
		painter->save();

		painter->setBrush(Qt::NoBrush);

		//QPen pen(Qt::green, iLineWidth, Qt::DashLine);
		//painter->setPen(pen);
		QRectF rect = blockRect.adjusted(-1, -1, 1, 1);
		// painter->drawRect(rect);

		QPen pen2(Qt::green, iLineWidth, Qt::SolidLine);
		painter->setPen(pen2);
		QPointF pt = QPointF(3, 3);

		painter->drawRect(QRectF(rect.topLeft() - pt, rect.topLeft() + pt));
		QPointF ptMid = QPointF(rect.left() + rect.width() / 2, rect.top());
		painter->drawRect(QRectF(ptMid - pt, ptMid + pt));
		painter->drawRect(QRectF(rect.topRight() - pt, rect.topRight() + pt));

		ptMid = QPointF(rect.left(), rect.top() + rect.height() / 2);
		painter->drawRect(QRectF(ptMid - pt, ptMid + pt));
		ptMid = QPointF(rect.right(), rect.top() + rect.height() / 2);
		painter->drawRect(QRectF(ptMid - pt, ptMid + pt));

		painter->drawRect(QRectF(rect.bottomLeft() - pt, rect.bottomLeft() + pt));
		ptMid = QPointF(rect.left() + rect.width() / 2, rect.bottom());
		painter->drawRect(QRectF(ptMid - pt, ptMid + pt));
		painter->drawRect(QRectF(rect.bottomRight() - pt, rect.bottomRight() + pt));

		painter->restore();
	}
}


/// <summary>
/// 计算区域边界
/// </summary>
/// <returns></returns>
QRectF WindowAppBlockComment::boundingRect() const
{
	return blockRect;
}


/// <summary>
/// 重写Shape函数，使其没有文字的空白部分也可以响应消息
/// </summary>
/// <returns></returns>
QPainterPath WindowAppBlockComment::shape() const
{
	QPainterPath path;
	path.addRect(blockRect);
	return path;
}

//
//
///// <summary>
///// 刷新全部（包括文字和尺寸）
///// </summary>
//void WindowAppBlockComment::updateAll()
//{
//
//}
















//====================================================
//
//					Del
//
//====================================================




///// <summary>
///// 键盘按下时（回车键结束编辑）
///// </summary>
///// <param name="event"></param>
//void WindowAppBlockComment::keyPressEvent(QKeyEvent* event)
//{
//	// 点击回车失去焦点，编辑完成，后续给FocusOutEvent处理
//	if (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter)
//	{
//		clearFocus();
//
//		return;
//	}
//
//	QGraphicsTextItem::keyPressEvent(event);
//}

///// <summary>
///// 返回边界矩形区域
///// </summary>
///// <returns></returns>
//QRectF WindowAppBlockComment::boundingRect() const
//{
//	return blockBoundingRect;
//}


///// <summary>
///// 响应双击事件，弹出编辑注释文字对话框
///// </summary>
///// <param name="event"></param>
//void WindowAppBlockComment::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event)
//{
//	// 只有鼠标左键才响应
//	if (event->button() == Qt::LeftButton)
//	{
//		DialogEditComment dialogComm(m_strComment);
//
//		if (dialogComm.exec() == QDialog::Accepted)
//		{
//			this->m_strComment = dialogComm.m_strComment;
//
//			// 刷新整个界面
//			this->updateAll();
//		}
//	}
//}



///// <summary>
///// 绘制文字（文字左上角对齐）
///// </summary>
///// <param name="painter"></param>
//void WindowAppBlockComment::drawContent(QPainter* painter)
//{
//	// 设置画笔
//	painter->setPen(QPen(COLOR_COMM_FRAME, PEN_WIDTH_FRAME));
//
//	// 绘制文字
//	painter->setFont(FONT_COMM);
//	QRectF textRect = QFontMetrics(FONT_COMM).boundingRect(m_strComment);
//	int textX = blockRect.left() + COMM_SIDE_SPACING;
//	int textY = blockRect.top() + COMM_SIDE_SPACING + textRect.height() / 2;
//	painter->drawText(textX, textY, m_strComment);
//}


//void WindowAppBlockComment::keyReleaseEvent(QKeyEvent* event)
//{
//	// 编译完毕后，更新一下外边界
//	this->updateRect();
//	this->update();
//
//	QGraphicsTextItem::keyReleaseEvent(event);
//}