Pipette and "On Preview Widgets" branch. See issue 227

The pipette part is already working quite nice but need to be finished. The widgets part needs more work...

rtgui/myflatcurve.h

@@ -0,0 +1,125 @@
+/*
+ *  This file is part of RawTherapee.
+ *
+ *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+ *
+ *  RawTherapee is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  RawTherapee is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _MYFLATCURVE_
+#define _MYFLATCURVE_
+
+#include <gtkmm.h>
+#include <vector>
+#include "curvelistener.h"
+#include "cursormanager.h"
+#include "mycurve.h"
+
+// For compatibility and simplicity reason, order shouldn't change, and must be identical to the order specified in the curveType widget
+enum FlatCurveType {
+	FCT_Empty = -1,		// Also used for identity curves
+	FCT_Linear,			// 0
+	FCT_MinMaxCPoints,	// 1
+	//FCT_Parametric,	// 2
+	// Insert new curve type above this line
+	FCT_Unchanged		// Must remain the last of the enum
+};
+
+enum MouseOverAreas {
+	FCT_Area_None       = 1<<0,		// over a zone that don't have any
+	FCT_Area_Insertion  = 1<<1,		// where the user can insert a new point
+	FCT_Area_Point      = 1<<2,		// over an existing point
+	FCT_Area_H          = 1<<3,		// cursor is on the horizontal line going through the edited control point
+	FCT_Area_V          = 1<<4,		// cursor is on the vertical   line going through the edited control point
+	FCT_Area_LeftTan    = 1<<5,		// in the left tangent edition area
+	FCT_Area_RightTan   = 1<<6		// in the right tangent edition area
+};
+
+enum EditedHandle {
+	FCT_EditedHandle_None     = 1<<0,
+	FCT_EditedHandle_CPointUD = 1<<1,	// UD stands for Unknown Direction
+	FCT_EditedHandle_CPoint   = 1<<2,
+	FCT_EditedHandle_CPointX  = 1<<3,
+	FCT_EditedHandle_CPointY  = 1<<4,
+	FCT_EditedHandle_LeftTan  = 1<<5,
+	FCT_EditedHandle_RightTan = 1<<6
+};
+
+class FlatCurveDescr {
+
+	public:
+		FlatCurveType type;
+		std::vector<double> x,				// Range: [0.0 - 1.0]
+							y,				// Range: [0.0 - 1.0], default value = 0.5
+							leftTangent,	// Range: [0.0 - 1.0], where 1.0 = distance from previous to this point
+							rightTangent;	// Range: [0.0 - 1.0], where 1.0 = distance from this to next point
+};
+
+class HandlePosition {
+
+	public:
+		double centerX;
+		double centerY;
+};
+
+class MyFlatCurve : public MyCurve {
+
+	protected:
+		FlatCurveDescr curve;
+		int closest_point;	// the point that is the closest from the cursor
+		int lit_point;		// the point that is lit when the cursor is near it
+		double clampedX;	// clamped grabbed point X coordinates in the [0;1] range
+		double clampedY;	// clamped grabbed point Y coordinates in the [0;1] range
+		double deltaX;		// signed X distance of the cursor between two consecutive MOTION_NOTIFY
+		double deltaY;		// signed Y distance of the cursor between two consecutive MOTION_NOTIFY
+		double distanceX;	// X distance from the cursor to the closest point
+		double distanceY;	// Y distance from the cursor to the closest point
+		double ugpX;		// unclamped grabbed point X coordinate in the graph
+		double ugpY;		// unclamped grabbed point Y coordinate in the graph
+		double leftTanX;	// X position of the left tangent handle
+		double rightTanX;	// X position of the right tangent handle
+		double preciseCursorX;		// X coordinate in the graph of the cursor, as a double value
+		double preciseCursorY;		// Y coordinate in the graph of the cursor, as a double value
+		double minDistanceX;    	// X minimal distance before point suppression
+		double minDistanceY;    	// Y minimal distance before point suppression
+		double deletedPointX;		// Backup of the X value of the edited point, when deleted while being dragged
+		HandlePosition leftTanHandle;	// XY coordinate if the upper left and bottom right corner of the left tangent handle
+		HandlePosition rightTanHandle;	// XY coordinate if the upper left and bottom right corner of the right tangent handle
+		bool tanHandlesDisplayed;	// True if the tangent handles are displayed
+		bool periodic;			// Flat curves are periodic by default
+		enum EditedHandle editedHandle;
+		bool draggingElement;
+		enum MouseOverAreas area;
+
+		void draw ();
+		void movePoint(bool moveX, bool moveY);
+		void defaultCurve (double iVal=0.5);
+		void interpolate ();
+		void getCursorPosition(GdkEvent* event);
+		void getMouseOverArea ();
+		bool getHandles(int n);
+		std::vector<double> get_vector (int veclen);
+
+	public:
+		MyFlatCurve ();
+		//~MyFlatCurve ();
+		std::vector<double> getPoints ();
+		void setPeriodicity (bool isPeriodic) { periodic = isPeriodic; };
+		void setPoints (const std::vector<double>& p);
+		void setType (FlatCurveType t);
+		bool handleEvents (GdkEvent* event);
+		void reset (double identityValue=0.5);
+		//void updateBackgroundHistogram (unsigned int* hist);
+};
+
+#endif