added comments but gui

src/Layer/PaintingArea.h

@@ -176,36 +176,91 @@ void colorPickerSetSecondColor();
  */
 void colorPickerSwapColors();
 
+/*!
+ * \brief createPenTool creates a Pen Tool.
+ */
 void createPenTool();
+
+/*!
+ * \brief createPlainTool creates a Plain Tool.
+ */
 void createPlainTool();
+
+/*!
+ * \brief createLineTool creates a Line Tool.
+ */
 void createLineTool();
+
+/*!
+ * \brief createRectangleTool creates a Rectangle Tool.
+ */
 void createRectangleTool();
+
+/*!
+ * \brief createCircleTool creates a Circle Tool.
+ */
 void createCircleTool();
+
+/*!
+ * \brief createPolygonTool creates a Polygon Tool.
+ */
 void createPolygonTool();
+
+/*!
+ * \brief createFloodFillTool creates a Floodfill Tool.
+ */
 void createFloodFillTool();
+
+/*!
+ * \brief createGradientTool creates a Gradient Tool.
+ */
 void createGradientTool();
 
 /*!
- * \brief The getWidthOfActive gets the horizontal dimensions of the active layer
- * \return Returns the horizontal pixle count of the active layer
+ * \brief The getWidthOfActive gets the horizontal dimensions of the active layer.
+ * \return Returns the horizontal pixle count of the active layer.
  */
 int getWidthOfActive();
 /*!
- * \brief The getHeightOfActive gets the vertical dimensions of the active layer
- * \return Returns the vertical pixle count of the active layer
+ * \brief The getHeightOfActive gets the vertical dimensions of the active layer.
+ * \return Returns the vertical pixle count of the active layer.
  */
 int getHeightOfActive();
 
+/*!
+ * \brief getMaxWidth gets the max width of the Canvas.
+ * \return return the width of the Canvas.
+ */
 int getMaxWidth();
 
+/*!
+ * \brief getMaxHeight gets the max height of the Canvas.
+ * \return return the height of the Canvas.
+ */
 int getMaxHeight();
 
-ImageType getTypeOfImageRealLayer();
+/*!
+ * \brief getTypeOfImageActiveLayer get the type of the active Layer.
+ * \return returns the image type of the active layer.
+ */
+ImageType getTypeOfImageActiveLayer();
 
-std::vector<QPoint> getPolygonDataOfRealLayer();
+/*!
+ * \brief getPolygonDataOfActiveLayer get the polygon data of the active Layer.
+ * \return return the polygon data of the active Layer.
+ */
+std::vector<QPoint> getPolygonDataOfActiveLayer();
 
-int getNumberOfActiveLayer();
+/*!
+ * \brief getIndexOfActiveLayer returns the index of athe active Layer.
+ * \return return the index of the active Layer.
+ */
+int getIndexOfActiveLayer();
 
+/*!
+ * \brief getImageOfActiveLayer returns the image of the active Layer.
+ * \return return the image of the active Layer.
+ */
 IntelliImage* getImageOfActiveLayer();
 
 /*!
@@ -220,16 +275,44 @@ QImage getImageDataOfActiveLayer();
  */
 std::vector<LayerObject>* getLayerBundle();
 
+/*!
+ * \brief Toolsettings - a class to manage Tool settings.
+ */
 IntelliToolsettings Toolsettings;
+
+/*!
+ * \brief colorPicker a class to manage Tool color.
+ */
 IntelliColorPicker colorPicker;
 
+/*!
+ * \brief historyGoBack a function to return the previous state of the project.
+ */
 void historyGoBack();
+
+/*!
+ * \brief historyGoForward a function to undo the return of the previous state of the project.
+ */
 void historyGoForward();
 
-void setLayerDimensions(int maxWidth, int maxHeight);
+/*!
+ * \brief setCanvasDimensions sets the dimension of the Canvas
+ * \param maxWidth  - the width of the Canvas.
+ * \param maxHeight - the height of the Canvas.
+ */
+void setCanvasDimensions(int maxWidth, int maxHeight);
 
-void setPixelToActive(QColor color, QPoint point);
+/*!
+ * \brief drawPixelOntoActive draws a pixel onto the image data of the active Layer.
+ * \param color - the color of the Pixel, which should be created.
+ * \param point - the Pixelposition.
+ */
+void drawPixelOntoActive(QColor color, QPoint point);
 
+/*!
+ * \brief setPolygonDataToActive sets polygondata to the active Layer.
+ * \param points - the points of the polygon data.
+ */
 void setPolygonDataToActive(std::vector<QPoint> points);
 public slots:
 /*!