RasterProcessTool/RasterMainWidgetGUI/RasterMainWidget/mapcanvasmap.cpp

#include <QtCore/QDebug>
#include <QtGui/QPainter>
#include <QtWidgets/QGraphicsSceneMouseEvent>

#include <mapcanvasmap.h>
#include <mapcanvas.h>
#include <maplayer.h>
#include <QDateTime>
#pragma execution_character_set("utf-8")

namespace LAMPMainWidget {

	/// <summary>
	/// 重写paint函数，绘制图层的内容
	/// </summary>
	/// <param name="painter"></param>
	/// <param name="option"></param>
	/// <param name="widget"></param>
	void MapCanvasMap::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget) {
		if (!mLayer->provider().hasContent()) {
			return;
		}
		painter->drawImage(mViewExtent.topLeft(), mLayer->provider().preparedImage());
	}

	QRectF MapCanvasMap::boundingRect() const {
		auto width = mViewExtent.size().width();
		auto height = mViewExtent.size().height();
		return mViewExtent + QMarginsF(1024, 1024, 1024, 1024);
	}

	void MapCanvasMap::setViewExtent(const QRectF& rect) {
		//qDebug() << "更新图层显示对象边界=>" << rect;
		if (rect != mViewExtent) {
			prepareGeometryChange();
			mViewExtent = rect;
		}
	}

}