Shifted from a custom QWidget to a subclass of QGraphicalView and connected it to the Main UI

1 files changed, 85 insertions, 147 deletions

diff --git a/src-qt5/desktop-utils/lumina-pdf/PrintWidget.cpp b/src-qt5/desktop-utils/lumina-pdf/PrintWidget.cpp
index 3fa87367..7a25357a 100644
--- a/src-qt5/desktop-utils/lumina-pdf/PrintWidget.cpp
+++ b/src-qt5/desktop-utils/lumina-pdf/PrintWidget.cpp
@@ -1,114 +1,46 @@
 #include "PrintWidget.h"
 
-class PageItem : public QGraphicsItem
-{
-public:
-    PageItem(int _pageNum, const QPicture* _pagePicture, QSize _paperSize, QRect _pageRect)
-        : pageNum(_pageNum), pagePicture(_pagePicture),
-          paperSize(_paperSize), pageRect(_pageRect)
-    {
-        qreal border = qMax(paperSize.height(), paperSize.width()) / 25;
-        brect = QRectF(QPointF(-border, -border),
-                       QSizeF(paperSize)+QSizeF(2*border, 2*border));
-        setCacheMode(DeviceCoordinateCache);
-    }
-
-    QRectF boundingRect() const Q_DECL_OVERRIDE
-    { return brect; }
-
-    inline int pageNumber() const
-    { return pageNum; }
-
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget) Q_DECL_OVERRIDE;
-
-private:
-    int pageNum;
-    const QPicture* pagePicture;
-    QSize paperSize;
-    QRect pageRect;
-    QRectF brect;
-};
-
-void PageItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
-{
-    Q_UNUSED(widget);
-
-    QRectF paperRect(0,0, paperSize.width(), paperSize.height());
-
-    // Draw shadow
-    painter->setClipRect(option->exposedRect);
-    qreal shWidth = paperRect.width()/100;
-    QRectF rshadow(paperRect.topRight() + QPointF(0, shWidth),
-                   paperRect.bottomRight() + QPointF(shWidth, 0));
-    QLinearGradient rgrad(rshadow.topLeft(), rshadow.topRight());
-    rgrad.setColorAt(0.0, QColor(0,0,0,255));
-    rgrad.setColorAt(1.0, QColor(0,0,0,0));
-    painter->fillRect(rshadow, QBrush(rgrad));
-    QRectF bshadow(paperRect.bottomLeft() + QPointF(shWidth, 0),
-                   paperRect.bottomRight() + QPointF(0, shWidth));
-    QLinearGradient bgrad(bshadow.topLeft(), bshadow.bottomLeft());
-    bgrad.setColorAt(0.0, QColor(0,0,0,255));
-    bgrad.setColorAt(1.0, QColor(0,0,0,0));
-    painter->fillRect(bshadow, QBrush(bgrad));
-    QRectF cshadow(paperRect.bottomRight(),
-                   paperRect.bottomRight() + QPointF(shWidth, shWidth));
-    QRadialGradient cgrad(cshadow.topLeft(), shWidth, cshadow.topLeft());
-    cgrad.setColorAt(0.0, QColor(0,0,0,255));
-    cgrad.setColorAt(1.0, QColor(0,0,0,0));
-    painter->fillRect(cshadow, QBrush(cgrad));
-
-    painter->setClipRect(paperRect & option->exposedRect);
-    painter->fillRect(paperRect, Qt::white);
-    if (!pagePicture)
-        return;
-    painter->drawPicture(pageRect.topLeft(), *pagePicture);
-
-    // Effect: make anything drawn in the margins look washed out.
-    QPainterPath path;
-    path.addRect(paperRect);
-    path.addRect(pageRect);
-    painter->setPen(QPen(Qt::NoPen));
-    painter->setBrush(QColor(255, 255, 255, 180));
-    painter->drawPath(path);
-}
-PrintWidget::PrintWidget(QPrinter *printer, QWidget *parent) : QWidget(parent), scene(0), curPage(1), viewMode(SinglePageView), zoomMode(FitInView), zoomFactor(1), initialized(false), fitting(true) {
-	this->printer = printer;
+PrintWidget::PrintWidget(QPrinter* printer, QWidget *parent) : QGraphicsView(parent), scene(0), curPage(1), 
+  viewMode(SinglePageView), zoomMode(FitInView), zoomFactor(1), initialized(false), fitting(true) {
+
+  this->printer = printer;
   this->setMouseTracking(true);
   QList<QWidget*> children = this->findChildren<QWidget*>("",Qt::FindChildrenRecursively);
   for(int i=0; i<children.length(); i++){
     children[i]->setContextMenuPolicy(Qt::CustomContextMenu);
     connect(children[i], SIGNAL(customContextMenuRequested(const QPoint&)), this, SIGNAL(customContextMenuRequested(const QPoint&)) );
   }
-	graphicsView = new GraphicsView;
-	graphicsView->setInteractive(false);
-	graphicsView->setDragMode(QGraphicsView::ScrollHandDrag);
-	graphicsView->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
-	QObject::connect(graphicsView->verticalScrollBar(), SIGNAL(valueChanged(int)),
+	this->setInteractive(false);
+	this->setDragMode(QGraphicsView::ScrollHandDrag);
+	this->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
+  this->setFocusPolicy(Qt::NoFocus);
+	QObject::connect(this->verticalScrollBar(), SIGNAL(valueChanged(int)),
 									 this, SLOT(updateCurrentPage()));
-	QObject::connect(graphicsView, SIGNAL(resized()), this, SLOT(fit()));
+	QObject::connect(this, SIGNAL(resized()), this, SLOT(fit()));
 
-	scene = new QGraphicsScene(graphicsView);
+	scene = new QGraphicsScene(this);
 	scene->setBackgroundBrush(Qt::gray);
-	graphicsView->setScene(scene);
+	this->setScene(scene);
 
-	QVBoxLayout *layout = new QVBoxLayout;
+	/*QVBoxLayout *layout = new QVBoxLayout;
 	setLayout(layout);
 	layout->setContentsMargins(0, 0, 0, 0);
-	layout->addWidget(graphicsView);
+	layout->addWidget(this);*/
 }
 
 PrintWidget::~PrintWidget() {
-	//Nothing here for now
+  //delete scene;
+  //delete items in pages(?)
 }
 
 //Public Slots
 
-void PrintWidget::fitInView() {
-  setZoomMode(FitToWidth);
+void PrintWidget::fitView() {
+  setZoomMode(FitInView);
 }
 
-void PrintWidget::fitToWidget() {
-  setZoomMode(FitInView);
+void PrintWidget::fitToWidth() {
+  setZoomMode(FitToWidth);
 }
 
 void PrintWidget::setZoomMode(ZoomMode mode) {
@@ -133,11 +65,10 @@ void PrintWidget::setViewMode(ViewMode mode) {
 	viewMode = mode;
 	layoutPages();
 	if (viewMode == AllPagesView) {
-		graphicsView->fitInView(scene->itemsBoundingRect(), Qt::KeepAspectRatio);
+		this->fitInView(scene->itemsBoundingRect(), Qt::KeepAspectRatio);
 		fitting = false;
 		zoomMode = CustomZoom;
-		zoomFactor = graphicsView->transform().m11() * (double(printer->logicalDpiY()) / logicalDpiY());
-		emit previewChanged();
+		zoomFactor = this->transform().m11() * (double(printer->logicalDpiY()) / logicalDpiY());
 	} else {
 		fitting = true;
 		fit();
@@ -148,31 +79,26 @@ void PrintWidget::zoomIn(double factor) {
 	fitting = false;
 	zoomMode = CustomZoom;
 	zoomFactor *= factor;
-	graphicsView->scale(factor, factor);
+	this->scale(factor, factor);
 }
 
 void PrintWidget::zoomOut(double factor) {
 	fitting = false;
 	zoomMode = CustomZoom;
 	zoomFactor *= factor;
-	graphicsView->scale(1/factor, 1/factor);
+	this->scale(1/factor, 1/factor);
 }
 
 void PrintWidget::updatePreview() {
   initialized = true;
   generatePreview();
-  graphicsView->updateGeometry();
-}
-
-void PrintWidget::setOrientation(QPrinter::Orientation orientation) {
-	printer->setOrientation(orientation);
-	generatePreview();
+  this->updateGeometry();
 }
 
 void PrintWidget::setVisible(bool visible) {
 	if(visible and !initialized)
 		updatePreview();
-	QWidget::setVisible(visible);
+	QGraphicsView::setVisible(visible);
 }
 
 void PrintWidget::setCurrentPage(int pageNumber) {
@@ -184,13 +110,13 @@ void PrintWidget::setCurrentPage(int pageNumber) {
 
 	if (lastPage != curPage && lastPage > 0 && lastPage <= pages.count()) {
 		if (zoomMode != FitInView) {
-			QScrollBar *hsc = graphicsView->horizontalScrollBar();
-			QScrollBar *vsc = graphicsView->verticalScrollBar();
-			QPointF pt = graphicsView->transform().map(pages.at(curPage-1)->pos());
+			QScrollBar *hsc = this->horizontalScrollBar();
+			QScrollBar *vsc = this->verticalScrollBar();
+			QPointF pt = this->transform().map(pages.at(curPage-1)->pos());
 			vsc->setValue(int(pt.y()) - 10);
 			hsc->setValue(int(pt.x()) - 10);
 		} else {
-			graphicsView->centerOn(pages.at(curPage-1));
+			this->centerOn(pages.at(curPage-1));
 		}
 	}
 }
@@ -198,16 +124,25 @@ void PrintWidget::setCurrentPage(int pageNumber) {
 //Private functions
 
 void PrintWidget::generatePreview() {
-	//printer->d_func()->setPreviewMode(true);
+  qDebug() << "generating preview";
+  if(!previewEngine)
+    previewEngine = new QPreviewPaintEngine();
+  if(!pdfEngine) 
+    pdfEngine = new QPdfPrintEngine(QPrinter::HighResolution);
+
+  printer->setEngines(previewEngine, previewEngine);
+  previewEngine->setProxyEngines(pdfEngine, pdfEngine);
+
 	emit paintRequested(printer);
-	//printer->d_func()->setPreviewMode(false);
-	//pictures = printer->previewPages();
+
+  printer->setEngines(pdfEngine, pdfEngine);
+
+  qDebug() << "Populating Scene";
 	populateScene(); // i.e. setPreviewPrintedPictures() e.l.
 	layoutPages();
 	curPage = qBound(1, curPage, pages.count());
 	if (fitting)
 			fit();
-	emit previewChanged();	
 }
 
 void PrintWidget::layoutPages() {
@@ -220,27 +155,26 @@ void PrintWidget::layoutPages() {
 	if (viewMode == AllPagesView) {
 		if (printer->orientation() == QPrinter::Portrait)
 			cols = qCeil(qSqrt(numPages));
-		else
-			cols = qFloor(qSqrt(numPages));
-		cols += cols % 2;  // Nicer with an even number of cols
-	}
-	else if (viewMode == FacingPagesView) {
-		cols = 2;
-		numPagePlaces += 1;
-	}
-	int rows = qCeil(double(numPagePlaces) / cols);
-
-	double itemWidth = pages.at(0)->boundingRect().width();
-	double itemHeight = pages.at(0)->boundingRect().height();
-	int pageNum = 1;
-	for (int i = 0; i < rows && pageNum <= numPages; i++) {
-		for (int j = 0; j < cols && pageNum <= numPages; j++) {
-			if (!i && !j && viewMode == FacingPagesView) {
-				continue;
-			} else {
-				pages.at(pageNum-1)->setPos(QPointF(j*itemWidth, i*itemHeight));
-				pageNum++;
-			}
+    else
+      cols = qFloor(qSqrt(numPages)); 
+    cols += cols % 2;  // Nicer with an even number of cols 
+  } 
+  else if (viewMode == FacingPagesView) { 
+    cols = 2;
+    numPagePlaces += 1; 
+  } 
+  int rows = qCeil(double(numPagePlaces) / cols);
+
+  double itemWidth = pages.at(0)->boundingRect().width(); 
+  double itemHeight = pages.at(0)->boundingRect().height(); 
+  int pageNum = 1; for (int i = 0; i < rows && pageNum <= numPages; i++) { 
+    for (int j = 0; j < cols && pageNum <= numPages; j++) { 
+      if (!i && !j && viewMode == FacingPagesView) {
+          continue; 
+      } else { 
+        pages.at(pageNum-1)->setPos(QPointF(j*itemWidth, i*itemHeight)); 
+        pageNum++; 
+      }
 		}
 	}
 	scene->setSceneRect(scene->itemsBoundingRect());
@@ -252,13 +186,15 @@ void PrintWidget::populateScene()
 		scene->removeItem(pages.at(i));
 	qDeleteAll(pages);
 	pages.clear();
+  qDebug() << "Pages cleared";
 
-	int numPages = pictures.count();
+	int numPages = pictures->count();
 	QSize paperSize = printer->pageLayout().fullRectPixels(printer->resolution()).size();
 	QRect pageRect = printer->pageLayout().paintRectPixels(printer->resolution());
+  qDebug() << "Fields set";
 
 	for (int i = 0; i < numPages; i++) {
-		PageItem* item = new PageItem(i+1, pictures.at(i), paperSize, pageRect);
+		PageItem* item = new PageItem(i+1, (*pictures)[i], paperSize, pageRect);
 		scene->addItem(item);
 		pages.append(item);
 	}
@@ -273,18 +209,17 @@ void PrintWidget::updateCurrentPage() {
 	int newPage = calcCurrentPage();
 	if (newPage != curPage) {
 		curPage = newPage;
-		emit previewChanged();
 	}
 }
 
 int PrintWidget::calcCurrentPage() {
 	int maxArea = 0;
 	int newPage = curPage;
-	QRect viewRect = graphicsView->viewport()->rect();
-	QList<QGraphicsItem*> items = graphicsView->items(viewRect);
+	QRect viewRect = this->viewport()->rect();
+	QList<QGraphicsItem*> items = this->items(viewRect);
 	for (int i=0; i<items.size(); ++i) {
 		PageItem* pg = static_cast<PageItem*>(items.at(i));
-		QRect overlap = graphicsView->mapFromScene(pg->sceneBoundingRect()).boundingRect() & viewRect;
+		QRect overlap = this->mapFromScene(pg->sceneBoundingRect()).boundingRect() & viewRect;
 		int area = overlap.width() * overlap.height();
 		if (area > maxArea) {
 			maxArea = area;
@@ -303,9 +238,9 @@ void PrintWidget::fit(bool doFitting) {
 		return;
 
 	if (doFitting && fitting) {
-		QRect viewRect = graphicsView->viewport()->rect();
+		QRect viewRect = this->viewport()->rect();
 		if (zoomMode == FitInView) {
-			QList<QGraphicsItem*> containedItems = graphicsView->items(viewRect, Qt::ContainsItemBoundingRect);
+			QList<QGraphicsItem*> containedItems = this->items(viewRect, Qt::ContainsItemBoundingRect);
 			foreach(QGraphicsItem* item, containedItems) {
 				PageItem* pg = static_cast<PageItem*>(item);
 				if (pg->pageNumber() == curPage)
@@ -330,23 +265,26 @@ void PrintWidget::fit(bool doFitting) {
 
 	if (zoomMode == FitToWidth) {
 		QTransform t;
-		qreal scale = graphicsView->viewport()->width() / target.width();
+		qreal scale = this->viewport()->width() / target.width();
 		t.scale(scale, scale);
-		graphicsView->setTransform(t);
+		this->setTransform(t);
 		if (doFitting && fitting) {
-			QRectF viewSceneRect = graphicsView->viewportTransform().mapRect(graphicsView->viewport()->rect());
+			QRectF viewSceneRect = this->viewportTransform().mapRect(this->viewport()->rect());
 			viewSceneRect.moveTop(target.top());
-			graphicsView->ensureVisible(viewSceneRect); // Nah...
+			this->ensureVisible(viewSceneRect); // Nah...
 		}
 	} else {
-		graphicsView->fitInView(target, Qt::KeepAspectRatio);
+		this->fitInView(target, Qt::KeepAspectRatio);
 		if (zoomMode == FitInView) {
-			int step = qRound(graphicsView->matrix().mapRect(target).height());
-			graphicsView->verticalScrollBar()->setSingleStep(step);
-			graphicsView->verticalScrollBar()->setPageStep(step);
+			int step = qRound(this->matrix().mapRect(target).height());
+			this->verticalScrollBar()->setSingleStep(step);
+			this->verticalScrollBar()->setPageStep(step);
 		}
 	}
 
-	zoomFactor = graphicsView->transform().m11() * (float(printer->logicalDpiY()) / this->logicalDpiY());
-	emit previewChanged();
+	zoomFactor = this->transform().m11() * (float(printer->logicalDpiY()) / this->logicalDpiY());
 }
+
+void PrintWidget::setPictures(QHash<int, QImage> *hash) {
+  pictures = hash;
+}