Spot Removal tool

It is not working yet, but the GUI is (almost) done.
See issue #2239.

rtgui/spot.h

@@ -0,0 +1,101 @@
+/*
+ *  This file is part of RawTherapee.
+ */
+#ifndef _SPOT_H_
+#define _SPOT_H_
+
+#include <gtkmm.h>
+#include "toolpanel.h"
+#include "edit.h"
+
+/**
+ * @brief Let the user create/edit/delete points for Spot Removal tool
+ *
+ * User Interface:
+ *
+ * For the rest of this documentation, T represent a "target" point (where the image is edited) and
+ * S represent the "source" location (where the edition takes its source data).
+ *
+ * When the edit button is active, all T points are shown by a small "dot". When the user
+ * move the cursor over one of them, a circle is displayed to show the radius of the brush, as well
+ * as a second circle representing the source data (S point). The user can then use the left mouse button
+ * over the icon to drag the T point. The left mouse button can be used over the S circle or the right
+ * mouse button can be used over the T point to move the S point.
+ *
+ * Using the left mouse button over the circle of the T point will let the user adjust its radius.
+ *
+ * Using the left mouse button over the feather circle will let the user adjust its radius by setting
+ * a coefficient (0.0 = same radius than the inner circle ; 1.0 = 2 times the inner radius).
+ *
+ * To create a new point, just move over a free area, and press the left mouse button while holding
+ * the CTRL key. This will create a new S and T pair of points. The CTRL key can be released, but keep
+ * the left mouse button pressed and move away to position the S point.
+ *
+ * To delete a point, move your mouse over any of its geometry press the middle or right mouse button
+ * (the point will be deleted on button release).
+ */
+class Spot : public ToolParamBlock, public FoldableToolPanel, public EditSubscriber
+{
+
+private:
+    int lastObject;                // current object that is hovered
+    int activeSpot;                // currently active spot, being edited
+    std::vector<rtengine::SpotEntry> spots; // list of edited spots
+    OPIcon sourceIcon;             // to show the source location
+    Circle sourceCircle;           // to show and change the Source radius
+    Circle sourceMODisc;           // to change the Source position
+    Circle targetCircle;           // to show and change the Target radius
+    Circle targetMODisc;           // to change the Target position
+    Circle sourceFeatherCircle;    // to show the Feather radius at the Source position
+    Circle targetFeatherCircle;    // to show the Feather radius at the Target position
+    Line link;                     // to show the link between the Source and Target position
+
+    OPIcon *getActiveSpotIcon ();
+    void updateGeometry ();
+    void createGeometry ();
+    void addNewEntry ();
+    void deleteSelectedEntry ();
+    void resetPressed ();
+
+protected:
+    Gtk::HBox* labelBox;
+    Gtk::CheckButton* editedCheckBox;
+    Gtk::Label* countLabel;
+    Gtk::ToggleButton* edit;
+    Gtk::Button* reset;
+    sigc::connection editConn, editedConn;
+
+    void editToggled ();
+    void editedToggled ();
+    Geometry* getVisibleGeometryFromMO (int MOID);
+
+public:
+
+    Spot ();
+    ~Spot ();
+
+    void read (const rtengine::procparams::ProcParams* pp, const ParamsEdited* pedited = NULL);
+    void write (rtengine::procparams::ProcParams* pp, ParamsEdited* pedited = NULL);
+
+    void enabledChanged ();
+
+    void setEditProvider (EditDataProvider* provider);
+
+    void setBatchMode (bool batchMode);
+
+    // EditSubscriber interface
+    CursorShape getCursor (const int objectID);
+    bool mouseOver (const int modifierKey);
+    bool button1Pressed (const int modifierKey);
+    bool button1Released ();
+    bool button2Pressed (const int modifierKey);
+    bool button3Pressed (const int modifierKey);
+    bool button3Released ();
+    bool drag1 (const int modifierKey);
+    bool drag3 (const int modifierKey);
+    bool pick2 (const bool picked);
+    bool pick3 (const bool picked);
+    void switchOffEditMode ();
+};
+
+#endif