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#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);
}
}
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