Improve drawing experiance

cropeditor/drawing/lineitem.cpp

@@ -9,15 +9,20 @@ LineItem::~LineItem()
     delete path;
 }
 
-void LineItem::mouseDragEvent(QGraphicsSceneMouseEvent *e, CropScene *)
+void LineItem::mouseDragEvent(QGraphicsSceneMouseEvent *e, CropScene *scene)
 {
     if (path == nullptr)
+    {
         path = new QPainterPath(e->scenePos());
+        pathItem = scene->addPath(*path, scene->pen(), scene->brush());
+    }
     else
+    {
         path->lineTo(e->scenePos());
+        pathItem->setPath(*path);
+    }
 }
 
-void LineItem::mouseDragEndEvent(QGraphicsSceneMouseEvent *, CropScene *scene)
+void LineItem::mouseDragEndEvent(QGraphicsSceneMouseEvent *, CropScene *)
 {
-    scene->addPath(*path, scene->pen(), scene->brush());
 }

cropeditor/drawing/lineitem.hpp

@@ -18,6 +18,7 @@ class LineItem : public DrawItem
 
     private:
     QPainterPath *path = nullptr;
+    QGraphicsPathItem *pathItem = nullptr;
 };
 
 #endif // LINEITEM_HPP

main.cpp

@@ -1,7 +1,7 @@
 #include "mainwindow.hpp"
 #include <QApplication>
 #include <QCommandLineParser>
-#include <QDebug>
+#include <QTimer>
 #include <QtGlobal>
 #include <stdio.h>
 
@@ -51,6 +51,8 @@ int main(int argc, char *argv[])
 
     MainWindow w;
     w.show();
-    if (parser.isSet(h)) w.hide();
+    QTimer::singleShot(0, [&] {
+        if (parser.isSet(h)) w.hide();
+    });
     return a.exec();
 }