Merge pull request #1301 from ispyisail/fix/zoom-content-hidden-items

Fix #1281: Zoom to content includes hidden wire texts

sources/diagram.cpp

@@ -929,7 +929,7 @@ bool Diagram::toPaintDevice(QPaintDevice &pix,
 	// determine la zone source =  contenu du schema + marges
 	QRectF source_area;
 	if (!use_border_) {
-		source_area = itemsBoundingRect();
+		source_area = visibleItemsBoundingRect();
 		source_area.translate(-margin, -margin);
 		source_area.setWidth (source_area.width () + 2.0 * margin);
 		source_area.setHeight(source_area.height() + 2.0 * margin);
@@ -997,7 +997,7 @@ QSize Diagram::imageSize() const
 	// determine la zone source =  contenu du schema + marges
 	qreal image_width, image_height;
 	if (!use_border_) {
-		QRectF items_rect = itemsBoundingRect();
+		QRectF items_rect = visibleItemsBoundingRect();
 		image_width  = items_rect.width();
 		image_height = items_rect.height();
 	} else {
@@ -2838,10 +2838,29 @@ void Diagram::adjustSceneRect()
 {
 	QRectF old_rect = sceneRect();
 	setSceneRect(border_and_titleblock.borderAndTitleBlockRect().united(
-			     itemsBoundingRect()));
+			     visibleItemsBoundingRect()));
 	update(old_rect.united(sceneRect()));
 }
 
+/**
+	@brief Diagram::visibleItemsBoundingRect
+	Same as QGraphicsScene::itemsBoundingRect(), but only counts items that
+	are shown. A hidden item keeps whatever position it last had: the text of
+	a single-line wire, and the wire texts hidden by "one text per potential",
+	are never positioned again and can sit far outside the drawing (#1281).
+	@return the bounding rect of the visible items, in scene coordinates
+*/
+QRectF Diagram::visibleItemsBoundingRect() const
+{
+	QRectF rect;
+	const auto scene_items = items();
+	for (QGraphicsItem *item : scene_items) {
+		if (item->isVisible())
+			rect |= item->sceneBoundingRect();
+	}
+	return rect;
+}
+
 /**
 	@brief Diagram::applyProperties
 	This method allows you to apply new rendering options while

sources/diagram.h

@@ -258,6 +258,7 @@ class Diagram : public QGraphicsScene
 		bool toPaintDevice(QPaintDevice &, int = -1, int = -1,
 				   Qt::AspectRatioMode = Qt::KeepAspectRatio);
 		QSize imageSize() const;
+		QRectF visibleItemsBoundingRect() const;
 		
 		bool isEmpty() const;
 	

sources/diagramview.cpp

@@ -479,8 +479,9 @@ void DiagramView::zoomFit()
 */
 void DiagramView::zoomContent()
 {
-	fitInView(m_diagram -> itemsBoundingRect(), Qt::KeepAspectRatio);
-	adjustGridToZoom();
+	const QRectF content = m_diagram->visibleItemsBoundingRect();
+	if (!content.isNull())
+		zoomToRect(content);
 }
 
 /**