Added "copy coordinates to clipboard"

closes #291

src/GUI/coordinatesitem.h

@@ -15,6 +15,8 @@ public:
 	void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
 	  QWidget *widget);
 
+	CoordinatesFormat format() const {return _format;}
+
 	void setCoordinates(const Coordinates &c);
 	void setFormat(const CoordinatesFormat &format);
 	void setDigitalZoom(qreal zoom);

src/GUI/gui.cpp

@@ -720,7 +720,10 @@ void GUI::keys()
 	  + "</i></td></tr><tr><td>" + tr("Zoom out") + "</td><td><i>"
 	  + QKeySequence(ZOOM_OUT).toString() + "</i></td></tr><tr><td>"
 	  + tr("Digital zoom") + "</td><td><i>" + QKeySequence(MODIFIER).toString()
-	  + tr("Zoom") + "</i></td></tr></table></div>");
+	  + tr("Zoom") + "</i></td></tr><tr><td></td><td></td></tr><tr><td>"
+	  + tr("Copy coordinates") + "</td><td><i>"
+	  + QKeySequence(MODIFIER).toString() + tr("Left Click")
+	  + "</i></td></tr></table></div>");
 
 	msgBox.exec();
 }

src/GUI/keys.h

@@ -8,6 +8,7 @@
 #define PREV_KEY                Qt::Key_Backspace
 #define FIRST_KEY               Qt::Key_Home
 #define LAST_KEY                Qt::Key_End
+#define MODIFIER_KEY            Qt::Key_Shift
 #define MODIFIER                Qt::ShiftModifier
 #define ZOOM_IN                 Qt::Key_Plus
 #define ZOOM_OUT                Qt::Key_Minus

src/GUI/mapview.cpp

@@ -3,6 +3,7 @@
 #include <QWheelEvent>
 #include <QApplication>
 #include <QScrollBar>
+#include <QClipboard>
 #include "data/poi.h"
 #include "data/data.h"
 #include "map/map.h"
@@ -522,7 +523,12 @@ void MapView::keyPressEvent(QKeyEvent *event)
 	else if (_digitalZoom && event->key() == Qt::Key_Escape) {
 		digitalZoom(0);
 		return;
-	} else {
+	} else  {
+		if (event->key() == MODIFIER_KEY) {
+			_cursor = viewport()->cursor();
+			viewport()->setCursor(Qt::CrossCursor);
+		}
+
 		QGraphicsView::keyPressEvent(event);
 		return;
 	}
@@ -530,6 +536,23 @@ void MapView::keyPressEvent(QKeyEvent *event)
 	zoom(z, pos);
 }
 
+void MapView::keyReleaseEvent(QKeyEvent *event)
+{
+	if (event->key() == MODIFIER_KEY && viewport()->cursor() == Qt::CrossCursor)
+		viewport()->setCursor(_cursor);
+
+	QGraphicsView::keyReleaseEvent(event);
+}
+
+void MapView::mousePressEvent(QMouseEvent *event)
+{
+	if (event->button() == Qt::LeftButton && event->modifiers() & MODIFIER)
+		QGuiApplication::clipboard()->setText(Format::coordinates(
+		  _map->xy2ll(mapToScene(event->pos())), _coordinates->format()));
+	else
+		QGraphicsView::mousePressEvent(event);
+}
+
 void MapView::plot(QPainter *painter, const QRectF &target, qreal scale,
   PlotFlags flags)
 {

src/GUI/mapview.h

@@ -123,13 +123,15 @@ private:
 	void updatePOIVisibility();
 	void skipColor() {_palette.nextColor();}
 
+	void mouseMoveEvent(QMouseEvent *event);
+	void mousePressEvent(QMouseEvent *event);
 	void mouseDoubleClickEvent(QMouseEvent *event);
 	void wheelEvent(QWheelEvent *event);
 	void keyPressEvent(QKeyEvent *event);
+	void keyReleaseEvent(QKeyEvent *event);
 	void drawBackground(QPainter *painter, const QRectF &rect);
 	void paintEvent(QPaintEvent *event);
 	void scrollContentsBy(int dx, int dy);
-	void mouseMoveEvent(QMouseEvent *event);
 	void leaveEvent(QEvent *event);
 
 	GraphicsScene *_scene;
@@ -163,6 +165,7 @@ private:
 
 	int _digitalZoom;
 	bool _plot;
+	QCursor _cursor;
 
 #ifdef ENABLE_HIDPI
 	qreal _deviceRatio;