First patch of the LockableColorPicker tool.

Still Work In Progress, but can be used without too much hassle.

rtgui/lockablecolorpicker.h

@@ -0,0 +1,85 @@
+/*
+ *  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 __COLORPICKER__
+#define __COLORPICKER__
+
+
+#include "../rtengine/coord.h"
+#include "guiutils.h"
+#include "edit.h"
+
+class CropWindow;
+
+class LockablePickerToolListener {
+public:
+    virtual ~LockablePickerToolListener () {}
+
+    /// Callback on Color Picker's visibility switch
+    virtual void switchPickerVisibility (bool isVisible) {}
+};
+
+class LockableColorPicker : BackBuffer
+{
+public:
+    enum class PickerSize {
+        S5=5,
+        S10=10,
+        S15=15,
+        S20=20,
+        S25=25,
+        S30=30
+    };
+private:
+    enum class ColorPickerType {
+        RGB,
+        HSV
+    };
+    CropWindow* cropWindow;  // the color picker is displayed in a single cropWindow, the one that the user has clicked in
+    ColorPickerType displayedValues;
+    rtengine::Coord position;  // Coordinate in image space
+    rtengine::Coord anchorOffset;
+    PickerSize size;
+    bool isValid;
+    float r, g, b;  // red green blue in [0;1] range
+    float h, s, v;  // hue saturation value in [0;1] range
+
+    void updateBackBuffer ();
+
+public:
+
+    LockableColorPicker (CropWindow* cropWindow);
+    LockableColorPicker (int x, int y, PickerSize size, const float R, const float G, const float B, CropWindow* cropWindow);
+
+    void draw (Cairo::RefPtr<Cairo::Context> &cr);
+
+    // Used to update the RGB color, the HSV values will be updated accordingly
+    void setPosition (const rtengine::Coord &newPos, const float R, const float G, const float B);
+    void setRGB (const float R, const float G, const float B);
+    void getImagePosition (rtengine::Coord &imgPos);
+    void getScreenPosition (rtengine::Coord &screenPos);
+    PickerSize getSize ();
+    bool isOver (int x, int y);
+    void setValidity (bool isValid);
+    void setSize (PickerSize newSize);
+    void incSize ();
+    void decSize ();
+};
+
+#endif