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//===========================================
// Lumina Desktop source code
// Copyright (c) 2017, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
// Simple subclass of QPrintPreviewWidget to provide
// notification when a context menu is requested
//===========================================
#ifndef _PRINT_GRAPHICS_H
#define _PRINT_GRAPHICS_H
#include "Renderer.h"
#include "TextData.h"
#include "graphicsitems.h"
#include <QApplication>
#include <QBoxLayout>
#include <QDebug>
#include <QGraphicsItem>
#include <QGraphicsView>
#include <QMouseEvent>
#include <QPageLayout>
#include <QScrollBar>
#include <QStyleOptionGraphicsItem>
#include <QTextDocument>
#include <QtMath>
class PrintWidget : public QGraphicsView {
Q_OBJECT
public:
enum ViewMode { SinglePageView, FacingPagesView, AllPagesView };
enum ZoomMode { CustomZoom, FitToWidth, FitInView };
private:
void generatePreview();
void layoutPages();
void populateScene();
void setViewMode(ViewMode);
void setZoomMode(ZoomMode);
QGraphicsScene *scene;
int curPage, publicPageNum;
ViewMode viewMode;
ZoomMode zoomMode;
QPageLayout::Orientation orientation;
double zoomFactor;
bool initialized, fitting;
QList<QGraphicsItem *> pages;
QHash<int, QList<QGraphicsItem *>> links;
QHash<int, QList<QGraphicsItem *>> annots;
int degrees;
Renderer *BACKEND;
public:
PrintWidget(Renderer *backend, QWidget *parent = 0);
~PrintWidget();
double getZoomFactor() const { return this->zoomFactor; }
ZoomMode getZoomMode() const { return this->zoomMode; }
int currentPage() const {
return curPage;
//return publicPageNum;
}
signals:
void resized();
void customContextMenuRequested(const QPoint &);
void currentPageChanged();
public slots:
void zoomIn(double factor = 1.2);
void zoomOut(double factor = 1.2);
void setCurrentPage(int);
void setVisible(bool) Q_DECL_OVERRIDE;
void highlightText(TextData *);
void goToPosition(int, float, float);
void updatePreview();
void fitView();
void fitToWidth();
void setAllPagesViewMode();
void setSinglePageViewMode();
void setFacingPagesViewMode();
private slots:
void updateCurrentPage();
int calcCurrentPage();
void fit(bool doFitting = false);
protected:
void resizeEvent(QResizeEvent *e) Q_DECL_OVERRIDE {
/*{
const QSignalBlocker blocker(verticalScrollBar()); // Don't change page,
QTBUG-14517 QGraphicsView::resizeEvent(e);
}*/
QGraphicsView::resizeEvent(e);
emit resized();
}
void clearItems(QList<QGraphicsItem *> itemList, QGraphicsItem *item) {
foreach (QGraphicsItem *graphicsItem, itemList) {
if (item == graphicsItem)
continue;
if (graphicsItem == dynamic_cast<LinkItem *>(graphicsItem))
graphicsItem->setOpacity(0.1);
if (graphicsItem == dynamic_cast<PopupItem *>(graphicsItem))
graphicsItem->setVisible(false);
}
}
void mouseMoveEvent(QMouseEvent *e) Q_DECL_OVERRIDE {
QGraphicsView::mouseMoveEvent(e);
static bool cursorSet = false;
if (QGraphicsItem *item =
scene->itemAt(mapToScene(e->pos()), transform())) {
QList<QGraphicsItem *> linkList;
if (item == dynamic_cast<PopupItem *>(item))
item = item->parentItem();
if (PageItem *page = dynamic_cast<PageItem *>(item))
linkList = page->childItems();
else if (item != dynamic_cast<QGraphicsRectItem *>(item))
linkList = item->parentItem()->childItems();
if (LinkItem *link = dynamic_cast<LinkItem *>(item)) {
item->setOpacity(1);
if (!cursorSet) {
QApplication::setOverrideCursor(QCursor(Qt::PointingHandCursor));
cursorSet = true;
}
} else if (cursorSet) {
QApplication::restoreOverrideCursor();
cursorSet = false;
}
if (AnnotZone *annotZone = dynamic_cast<AnnotZone *>(item)) {
if (annotZone->hasText() or annotZone->hasAuthor())
annotZone->annotation()->setVisible(true);
item = annotZone->annotation();
}
clearItems(linkList, item);
}
}
void mouseReleaseEvent(QMouseEvent *e) Q_DECL_OVERRIDE {
QGraphicsView::mouseReleaseEvent(e);
QPointF scenePoint = mapToScene(e->pos());
QGraphicsItem *item = scene->itemAt(scenePoint, transform());
if (LinkItem *link = dynamic_cast<LinkItem *>(item)) {
BACKEND->handleLink(this, link->getData()->text());
link->setOpacity(0.1);
}
}
void showEvent(QShowEvent *e) Q_DECL_OVERRIDE {
QGraphicsView::showEvent(e);
emit resized();
}
};
#endif
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