利用widget重构parkinglot

ParkingLotWidget.cpp

@@ -0,0 +1,111 @@
+#include "ParkingLotWidget.h"
+
+#include <QFile>
+#include <QMessageBox>
+#include <QDomDocument>
+#include <QDebug>
+#include "Road.h"
+#include "ParkingSpaceInfo.h"
+#include <QPainter>
+
+ParkingLotWidget::ParkingLotWidget(QWidget *parent, const QString& xml) : QWidget(parent)
+{
+	resize(1000, 1000);
+	parse_xml(xml);
+	if (rootLayoutDirection == horizontal)
+		setLayout(hBoxLayout);
+	else
+		setLayout(vBoxLayout);
+
+}
+
+
+void ParkingLotWidget::paintEvent(QPaintEvent * event)
+{
+	
+}
+
+ParkingLotWidget::~ParkingLotWidget()
+{
+}
+
+void ParkingLotWidget::parse_xml(const QString & xml)
+{
+	QFile file(xml);
+	if (!file.open(QFile::ReadOnly | QFile::Text)) {
+		QMessageBox::critical(this, QObject::tr("Error"),
+			QObject::tr("Cannot read file %1").arg(xml));
+	}
+
+	QString errorStr;
+	int errorLine;
+	int errorColumn;
+	QDomDocument doc;
+	if (!doc.setContent(&file, false, &errorStr, &errorLine, &errorColumn)) {
+		QMessageBox::critical(this, QObject::tr("Error"),
+			QObject::tr("Parse error at line %1, column %2: %3")
+			.arg(errorLine).arg(errorColumn).arg(errorStr));
+	}
+	QDomElement element = doc.documentElement().firstChild().toElement();
+	QString name = element.tagName();
+	if (element.tagName() == "vLayout")
+	{
+		rootLayoutDirection = vertical;
+		vBoxLayout = parseVbox(element);
+	} else if (element.tagName() == "hLayout")
+	{
+		rootLayoutDirection = horizontal;
+		hBoxLayout = parseHbox(element);
+	} else
+	{
+		qDebug() << this -> objectName() << "布局文件错误";
+	}
+}
+
+inline QHBoxLayout * ParkingLotWidget::parseHbox(const QDomElement & element)
+{
+	return static_cast<QHBoxLayout*>(parseLayout(element));
+}
+
+inline QVBoxLayout * ParkingLotWidget::parseVbox(const QDomElement & element)
+{
+	return static_cast<QVBoxLayout*>(parseLayout(element));;
+}
+
+QBoxLayout * ParkingLotWidget::parseLayout(const QDomElement & element)
+{
+	QBoxLayout* layout;
+	if (element.tagName() == "hLayout")
+		layout = new QHBoxLayout;
+	else
+		layout = new QVBoxLayout;
+	
+	QDomElement child = element.firstChild().toElement();
+	while (!child.isNull())
+	{
+		QString name = child.tagName();
+		if (name == "road")
+		{
+			const int l = child.attribute("length").toInt();
+			if (child.attribute("direction") == "vertical")
+				layout->addWidget(new Road(this, l, Road::vertical));
+			else
+				layout->addWidget(new Road(this, l, Road::horizontal));
+		}
+		else if (name == "room")
+		{
+			const auto n = child.attribute("number", "1").toInt();
+			layout->addLayout(ParkingSpaceInfo::makeParkingSapceGroup(
+				this, child.attribute("direction"), n, child.attribute("expendDirection")));
+		}
+		else if ((name.at(0) == 'v' ||  name.at(0) == 'h' )&& name.contains("Layout"))
+			layout->addLayout(parseHbox(child));
+		else
+			qDebug() << this->objectName() << "错误的xml标签";
+		child = child.nextSiblingElement();
+	}
+	layout->setMargin(0);
+	layout->setSpacing(0);
+	layout->setContentsMargins(0, 0, 0, 0);
+	return layout;
+}