Fix grid and guide startup behavior and update german translation

sources/diagram.cpp

@@ -39,7 +39,7 @@
 #include "qetxml.h"
 #include "undocommand/addelementtextcommand.h"
 #include "qetinformation.h"
-
+#include "qetproject.h"
 #include <cassert>
 #include <math.h>
 
@@ -65,7 +65,6 @@ QColor		Diagram::background_color = Qt::white;
 Diagram::Diagram(QETProject *project) :
 	QGraphicsScene           (project),
 	m_project                (project),
-	draw_grid_               (true),
 	use_border_              (true),
 	draw_terminals_          (true),
 	draw_colored_conductors_ (true),
@@ -73,6 +72,11 @@ Diagram::Diagram(QETProject *project) :
 	m_freeze_new_elements    (false),
 	m_freeze_new_conductors_ (false)
 {
+
+	QSettings settings;
+	draw_grid_ = settings.value(QStringLiteral("diagrameditor/grid_display_startup"), true).toBool();
+	draw_guides_ = settings.value(QStringLiteral("diagrameditor/guides_display_startup"), false).toBool();
+
 	setItemIndexMethod(QGraphicsScene::NoIndex);
 	/* Set to no index,
 	 * because they can be the source of the crash with conductor and shape ghost.
@@ -121,8 +125,30 @@ Diagram::Diagram(QETProject *project) :
 	connect(this, &Diagram::diagramActivated,
 		this, &Diagram::loadCndFolioSeq);
 	adjustSceneRect();
-}
 
+	m_guides_list.clear();
+	if (m_project) {
+		for (const auto &pg : m_project->defaultGuides()) {
+			Diagram::Guide g;
+			g.orientation = static_cast<Diagram::Guide::Orientation>(pg.orientation);
+			g.position = pg.position;
+			g.color = pg.color;
+			m_guides_list.append(g);
+		}
+	} else {
+		QSettings settings;
+		int size = settings.beginReadArray(QStringLiteral("diagrameditor/defaultguides"));
+		for (int i = 0; i < size; ++i) {
+			settings.setArrayIndex(i);
+			Diagram::Guide g;
+			g.orientation = static_cast<Diagram::Guide::Orientation>(settings.value(QStringLiteral("orientation"), 0).toInt());
+			g.position = settings.value(QStringLiteral("position"), 0.0).toReal();
+			g.color = QColor(settings.value(QStringLiteral("color"), QStringLiteral("#ff0000")).toString());
+			m_guides_list.append(g);
+		}
+		settings.endArray();
+	}
+}
 /**
 	@brief Diagram::~Diagram
 	Destructor
@@ -186,6 +212,14 @@ void Diagram::drawBackground(QPainter *p, const QRectF &r) {
 	p -> setBrush(Diagram::background_color);
 	p -> drawRect(r);
 
+	QSettings settings;
+	QRectF rect = settings.value(
+				QStringLiteral("diagrameditor/zoom-out-beyond-of-folio"),
+				false).toBool() ? r
+						: border_and_titleblock
+						  .insideBorderRect()
+						  .intersected(r);
+
 	if (draw_grid_) {
 			/* Draw the points of the grid
 			 * if background color is black,
@@ -200,19 +234,10 @@ void Diagram::drawBackground(QPainter *p, const QRectF &r) {
 
 		p -> setBrush(Qt::NoBrush);
 
-		// If user allow zoom out beyond of folio,
-		// we draw grid outside of border.
-		QSettings settings;
 		int xGrid = settings.value(QStringLiteral("diagrameditor/Xgrid"),
 								   Diagram::xGrid).toInt();
 		int yGrid = settings.value(QStringLiteral("diagrameditor/Ygrid"),
 								   Diagram::yGrid).toInt();
-		QRectF rect = settings.value(
-					QStringLiteral("diagrameditor/zoom-out-beyond-of-folio"),
-					false).toBool() ? r
-							: border_and_titleblock
-							  .insideBorderRect()
-							  .intersected(r);
 
 		qreal limit_x = rect.x() + rect.width();
 		qreal limit_y = rect.y() + rect.height();
@@ -252,7 +277,23 @@ void Diagram::drawBackground(QPainter *p, const QRectF &r) {
 				p -> drawPoints(points);
 	}
 
-	if (use_border_) border_and_titleblock.draw(p);
+	if (draw_guides_) {
+		for (const Diagram::Guide &guide : m_guides_list) {
+			QPen guidePen(guide.color, 1, Qt::DashLine);
+			guidePen.setCosmetic(true);
+			p->setPen(guidePen);
+
+			if (guide.orientation == Diagram::Guide::Vertical) {
+				p->drawLine(guide.position, rect.top(), guide.position, rect.bottom());
+			} else {
+				p->drawLine(rect.left(), guide.position, rect.right(), guide.position);
+			}
+		}
+	}
+	if (use_border_) {
+		border_and_titleblock.draw(p);
+	}
+
 	p -> restore();
 }
 
@@ -2635,3 +2676,24 @@ void Diagram::restoreText(Element* elmt)
 		}
 	}
 }
+
+QUndoStack &Diagram::undoStack() {
+	return *(project()->undoStack());
+}
+
+/**
+ * @brief Diagram::updateProjectGuides
+ * Aktualisiert die internen Hilfslinien dieses Schaltplans
+ * basierend auf den Projekt-Einstellungen und erzwingt ein Neuzeichnen.
+ */
+void Diagram::updateProjectGuides(const QList<GuideProperties> &guides) {
+	m_guides_list.clear();
+	for (const GuideProperties &pg : guides) {
+		Diagram::Guide g;
+		g.orientation = static_cast<Diagram::Guide::Orientation>(pg.orientation);
+		g.position = pg.position;
+		g.color = pg.color;
+		m_guides_list.append(g);
+	}
+	update();
+}