From a69e97943539a8abc4d2762638c169dc19c88516 Mon Sep 17 00:00:00 2001
From: Javier <dev.git@javispedro.com>
Date: Sun, 7 Jun 2015 21:22:45 +0200
Subject: initial import

---
 notebookview.cc | 194 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 194 insertions(+)
 create mode 100644 notebookview.cc

(limited to 'notebookview.cc')

diff --git a/notebookview.cc b/notebookview.cc
new file mode 100644
index 0000000..2605792
--- /dev/null
+++ b/notebookview.cc
@@ -0,0 +1,194 @@
+#include <QtCore/QDebug>
+#include <QtGui/QResizeEvent>
+#include "notebookview.h"
+
+#define VIEW_MARGIN 2
+#define PAGE_SEPARATION 100
+
+NotebookView::NotebookView(QWidget *parent) :
+    QGraphicsView(parent), _nb(new AfdNotebook(this)),
+    _zoom(100), _curPage(0)
+{
+	setScene(new QGraphicsScene(this));
+	setTransformationAnchor(AnchorUnderMouse);
+	setDragMode(ScrollHandDrag);
+	setRenderHints(QPainter::Antialiasing);
+}
+
+void NotebookView::setNotebook(const QString &path)
+{
+	removePages();
+	if (!path.isEmpty()) {
+		if (_nb->open(path)) {
+			_nbPath = path;
+			if (_zoom > 100) {
+				_zoom = 100;
+				emit zoomChanged();
+			}
+			createPages();
+			emit pageNumbersChanged();
+			if (!_pages.isEmpty()) {
+				_curPage = _pages.begin().key();
+				centerOn(_pages[_curPage]);
+				emit curPageChanged();
+			}
+		} else {
+			qWarning() << "Could not open notebook:" << _nbPath;
+		}
+	}
+}
+
+QString NotebookView::notebook() const
+{
+	return _nbPath;
+}
+
+QList<int> NotebookView::pageNumbers() const
+{
+	return _pages.keys();
+}
+
+int NotebookView::curPage() const
+{
+	return _curPage;
+}
+
+void NotebookView::setCurPage(int page)
+{
+	if (page != _curPage) {
+		_curPage = page;
+		if (_zoom > 100) {
+			setZoom(100);
+		}
+		if (_pages.contains(_curPage)) {
+			centerOn(_pages[_curPage]);
+		}
+		emit curPageChanged();
+	}
+}
+
+int NotebookView::zoom() const
+{
+	return _zoom;
+}
+
+void NotebookView::setZoom(int zoom)
+{
+	if (zoom != _zoom) {
+		_zoom = zoom;
+		calculateScale();
+	}
+}
+
+void NotebookView::clear()
+{
+	removePages();
+	emit pageNumbersChanged();
+}
+
+void NotebookView::prevPage()
+{
+	QMap<int, PageItem*>::iterator it = _pages.lowerBound(_curPage);
+	if (it != _pages.end() && it != _pages.begin()) {
+		--it;
+		setCurPage(it.key());
+	}
+}
+
+void NotebookView::nextPage()
+{
+	QMap<int, PageItem*>::iterator it = _pages.upperBound(_curPage);
+	if (it != _pages.end()) {
+		setCurPage(it.key());
+	}
+}
+
+void NotebookView::resizeEvent(QResizeEvent *event)
+{
+	QGraphicsView::resizeEvent(event);
+	calculateScale();
+}
+
+void NotebookView::scrollContentsBy(int dx, int dy)
+{
+	QGraphicsView::scrollContentsBy(dx, dy);
+	QGraphicsItem *item = itemAt(size().width() / 2, size().height() / 2);
+	while (item && item->type() != PageItem::Type) {
+		item = item->parentItem();
+	}
+	if (item && item->type() == PageItem::Type) {
+		PageItem * page = static_cast<PageItem*>(item);
+		int centerPage = page->pageNum();
+		if (centerPage != _curPage) {
+			_curPage = centerPage;
+			emit curPageChanged();
+		}
+	}
+}
+
+void NotebookView::removePages()
+{
+	_pages.clear();
+	scene()->clear();
+	scene()->setSceneRect(QRectF());
+	_nb->close();
+	_nbPath.clear();
+	_maxPageSize.setWidth(0);
+	_maxPageSize.setHeight(0);
+	resetTransform();
+}
+
+void NotebookView::createPages()
+{
+	QStringList pens = _nb->penSerials();
+	if (pens.isEmpty()) return;
+
+	QList<int> pagesWithStrokes = _nb->pagesWithStrokes(pens.first());
+	Q_ASSERT(_pages.isEmpty());
+
+	_maxPageSize.setWidth(0);
+	_maxPageSize.setHeight(0);
+	foreach (int pageNum, pagesWithStrokes) {
+		PageItem *page = new PageItem(_nb, pageNum);
+		QRectF box = page->boundingRect();
+		if (box.width() > _maxPageSize.width()) {
+			_maxPageSize.setWidth(box.width());
+		}
+		if (box.height() > _maxPageSize.height()) {
+			_maxPageSize.setHeight(box.height());
+		}
+		_pages.insert(pageNum, page);
+	}
+
+	calculateScale();
+
+	qreal curY = 0;
+	foreach (PageItem *page, _pages) {
+		QRectF box = page->boundingRect();
+		page->setPos((_maxPageSize.width() - box.width()) / 2.0, curY);
+		curY += box.height();
+		curY += PAGE_SEPARATION;
+
+		scene()->addItem(page);
+	}
+
+	scene()->setSceneRect(0, 0, _maxPageSize.width(), curY);
+}
+
+void NotebookView::calculateScale()
+{
+	if (_pages.isEmpty() || _maxPageSize.isEmpty()) return;
+	const int margin = VIEW_MARGIN;
+	QRectF viewRect = viewport()->rect().adjusted(margin, margin, -margin, margin);
+	qreal baseScale = qMin(viewRect.width() / _maxPageSize.width(),
+	                       viewRect.height() / _maxPageSize.height());
+	resetTransform();
+	scale(baseScale, baseScale);
+	if (_zoom < 100) {
+		qreal s = 0.25 + ((_zoom / 100.0) * 0.75);
+		scale(s, s);
+	} else if (_zoom > 100) {
+		qreal s = 1.0 + (_zoom - 100) * 0.015;
+		scale(s, s);
+	}
+}
-- 
cgit v1.2.3