Add missing qpainter methods (#834)

* Add missing qpainter methods

* Remove unsafe endNativePainting/beginNativePainting + rename method

crates/cxx-qt-lib/src/gui/qpainter.rs

@@ -119,6 +119,10 @@ mod ffi {
         #[rust_name = "draw_polyline"]
         fn drawPolyline(self: Pin<&mut QPainter>, points: &QPolygon);
 
+        /// Draws the current rectangle with the current pen and brush.
+        #[rust_name = "draw_rect_f"]
+        fn drawRect(self: Pin<&mut QPainter>, rectangle: &QRectF);
+
         /// Draws the given text with the currently defined text direction, beginning at the given position.
         #[rust_name = "draw_text"]
         fn drawText(self: Pin<&mut QPainter>, point: &QPoint, text: &QString);
@@ -212,6 +216,10 @@ mod ffi {
         /// Translates the coordinate system by the given offset.
         fn translate(self: Pin<&mut QPainter>, offset: &QPoint);
 
+        /// Returns true if view transformation is enabled; otherwise returns false.
+        #[rust_name = "view_transform_enabled"]
+        fn viewTransformEnabled(self: &QPainter) -> bool;
+
         /// Returns the window rectangle.
         fn window(self: &QPainter) -> QRect;
     }