+#ifndef __PANEL_HXX
+#define __PANEL_HXX
+
+#include <osg/ref_ptr>
+#include <osg/StateSet>
+#include <osg/Texture2D>
+
+#include <simgear/compiler.h>
+#include <simgear/props/props.hxx>
+#include <simgear/structure/subsystem_mgr.hxx>
+#include <simgear/structure/SGBinding.hxx>
+#include <simgear/math/interpolater.hxx>
+#include <simgear/timing/timestamp.hxx>
+
+#include <cmath>
+#include <vector>
+#include <map>
+
+#include <Main/fg_props.hxx>
+
+class FGPanelInstrument;
+class fntFont;
+class DCLGPS;
+
+////////////////////////////////////////////////////////////////////////
+// Texture management.
+////////////////////////////////////////////////////////////////////////
+
+
+/**
+ * Texture manager (should migrate out into FGFS).
+ *
+ * This class ensures that no texture is loaded more than once.
+ */
+class FGTextureManager
+{
+public:
+ static osg::Texture2D* createTexture(const std::string &relativePath,
+ bool staticTexture = true);
+ static void addTexture(const std::string &relativePath, osg::Texture2D* texture);
+private:
+ static std::map<std::string,osg::ref_ptr<osg::Texture2D> > _textureMap;
+};
+
+
+/**
+ * Cropped texture (should migrate out into FGFS).
+ *
+ * This structure wraps an SSG texture with cropping information.
+ */
+class FGCroppedTexture
+{
+public:
+
+ FGCroppedTexture ();
+ FGCroppedTexture (const std::string &path,
+ float _minX = 0.0, float _minY = 0.0,
+ float _maxX = 1.0, float _maxY = 1.0);
+ virtual ~FGCroppedTexture ();
+
+ virtual void setPath (const std::string &path) { _path = path; }
+
+ virtual const std::string &getPath () const { return _path; }
+
+ virtual osg::StateSet* getTexture ();
+
+ virtual void setCrop (float minX, float minY, float maxX, float maxY) {
+ _minX = minX; _minY = minY; _maxX = maxX; _maxY = maxY;
+ }
+
+ virtual float getMinX () const { return _minX; }
+ virtual float getMinY () const { return _minY; }
+ virtual float getMaxX () const { return _maxX; }
+ virtual float getMaxY () const { return _maxY; }
+
+
+private:
+ std::string _path;
+ osg::ref_ptr<osg::StateSet> _texture;
+ float _minX, _minY, _maxX, _maxY;
+};
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Top-level panel.
+////////////////////////////////////////////////////////////////////////
+
+
+/**
+ * Instrument panel class.
+ *
+ * The panel is a container that has a background texture and holds
+ * zero or more instruments. The panel will order the instruments to
+ * redraw themselves when necessary, and will pass mouse clicks on to
+ * the appropriate instruments for processing.
+ */
+class FGPanel : public SGSubsystem
+{
+public:
+
+ FGPanel ();
+ virtual ~FGPanel ();
+
+ // Update the panel (every frame).
+ virtual void init ();
+ virtual void bind ();
+ virtual void unbind ();
+ virtual void draw (osg::State& state);
+ virtual void update (double);
+ void update (osg::State& state);
+ virtual void update (osg::State& state, GLfloat winx, GLfloat winw, GLfloat winy, GLfloat winh);
+
+ virtual void updateMouseDelay();
+
+ // transfer pointer ownership!!!
+ virtual void addInstrument (FGPanelInstrument * instrument);
+
+ // Background texture.
+ virtual void setBackground (osg::Texture2D* texture);
+
+ // Background multiple textures.
+ virtual void setMultiBackground (osg::Texture2D* texture, int idx);
+
+ // Make the panel visible or invisible.
+ virtual bool getVisibility () const;
+ virtual void setVisibility (bool visibility);
+
+ // Full width of panel.
+ virtual void setWidth (int width) { _width = width; }
+ virtual int getWidth () const { return _width; }
+
+ // Full height of panel.
+ virtual void setHeight (int height) { _height = height; }
+ virtual int getHeight () const { return _height; }
+
+ // X-offset
+ virtual void setXOffset (int offset);
+ virtual int getXOffset () const { return _x_offset->getIntValue(); }
+
+ // Y-offset.
+ virtual void setYOffset (int offset);
+ virtual int getYOffset () const { return _y_offset->getIntValue(); }
+
+ // View height.
+ virtual void setViewHeight (int height) { _view_height = height; }
+ virtual int getViewHeight () const { return _view_height; }
+
+ // Handle a mouse click.
+ virtual bool doMouseAction (int button, int updown, int x, int y);
+ virtual bool doLocalMouseAction(int button, int updown, int x, int y);
+
+ virtual void setDepthTest (bool enable);
+
+ bool getAutohide(void) const { return _autohide; };
+ void setAutohide(bool enable) { _autohide = enable; };
+
+private:
+ void setupVirtualCockpit();
+ void cleanupVirtualCockpit();
+
+ mutable bool _mouseDown;
+ mutable int _mouseButton, _mouseX, _mouseY;
+ mutable int _mouseDelay;
+ mutable FGPanelInstrument * _mouseInstrument;
+ typedef std::vector<FGPanelInstrument *> instrument_list_type;
+ int _width;
+ int _height;
+ int _view_height;
+
+ SGPropertyNode_ptr _visibility;
+ SGPropertyNode_ptr _x_offset;
+ SGPropertyNode_ptr _y_offset;
+ SGPropertyNode_ptr _jitter;
+ SGPropertyNode_ptr _flipx;
+
+ SGConstPropertyNode_ptr _xsize_node;
+ SGConstPropertyNode_ptr _ysize_node;
+
+ osg::ref_ptr<osg::StateSet> _bg;
+ osg::ref_ptr<osg::StateSet> _mbg[8];
+ // List of instruments in panel.
+ instrument_list_type _instruments;
+ bool _enable_depth_test;
+ bool _autohide;
+};
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Actions
+////////////////////////////////////////////////////////////////////////
+
+
+/**
+ * Class for user actions.
+ *
+ * The actions are command bindings, like bindings for the keyboard
+ * or joystick, but they are tied to specific mouse actions in
+ * rectangular areas of the panel.
+ */
+class FGPanelAction : public SGConditional
+{
+public:
+ FGPanelAction ();
+ FGPanelAction (int button, int x, int y, int w, int h, bool repeatable);
+ virtual ~FGPanelAction ();
+
+ // Getters.
+ virtual int getButton () const { return _button; }
+ virtual int getX () const { return _x; }
+ virtual int getY () const { return _y; }
+ virtual int getWidth () const { return _w; }
+ virtual int getHeight () const { return _h; }
+
+ // Setters.
+
+ // transfer pointer ownership
+ virtual void addBinding (SGBinding * binding, int updown);
+ virtual void setButton (int button) { _button = button; }
+ virtual void setX (int x) { _x = x; }
+ virtual void setY (int y) { _y = y; }
+ virtual void setWidth (int w) { _w = w; }
+ virtual void setHeight (int h) { _h = h; }
+
+ // Check whether we're in the area.
+ virtual bool inArea (int button, int x, int y)
+ {
+ return (button == _button &&
+ x >= _x &&
+ x < _x + _w &&
+ y >= _y &&
+ y < _y + _h);
+ }
+
+ // Perform the action.
+ virtual bool doAction (int updown);
+
+private:
+ typedef std::vector<SGBinding *> binding_list_t;
+
+ int _button;
+ int _x;
+ int _y;
+ int _w;
+ int _h;
+ bool _repeatable;
+ int _last_state;
+ binding_list_t _bindings[2];
+};
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Transformations.
+////////////////////////////////////////////////////////////////////////
+
+
+/**
+ * A transformation for a layer.
+ */
+class FGPanelTransformation : public SGConditional
+{
+public:
+
+ enum Type {
+ XSHIFT,
+ YSHIFT,
+ ROTATION
+ };
+
+ FGPanelTransformation ();
+ virtual ~FGPanelTransformation ();
+
+ Type type;
+ SGConstPropertyNode_ptr node;
+ float min;
+ float max;
+ bool has_mod;
+ float mod;
+ float factor;
+ float offset;
+ SGInterpTable * table;
+};
+
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Layers
+////////////////////////////////////////////////////////////////////////
+
+
+/**
+ * A single layer of a multi-layered instrument.
+ *
+ * Each layer can be subject to a series of transformations based
+ * on current FGFS instrument readings: for example, a texture
+ * representing a needle can rotate to show the airspeed.
+ */
+class FGInstrumentLayer : public SGConditional
+{
+public:
+
+ FGInstrumentLayer (int w = -1, int h = -1);
+ virtual ~FGInstrumentLayer ();
+
+ virtual void draw (osg::State& state) = 0;
+ virtual void transform () const;
+
+ virtual int getWidth () const { return _w; }
+ virtual int getHeight () const { return _h; }
+ virtual void setWidth (int w) { _w = w; }
+ virtual void setHeight (int h) { _h = h; }
+
+ // Transfer pointer ownership!!
+ // DEPRECATED
+ virtual void addTransformation (FGPanelTransformation * transformation);
+
+protected:
+ int _w, _h;
+
+ typedef std::vector<FGPanelTransformation *> transformation_list;
+ transformation_list _transformations;
+};
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Instruments.
+////////////////////////////////////////////////////////////////////////
+
+
+/**
+ * Abstract base class for a panel instrument.
+ *
+ * A panel instrument consists of zero or more actions, associated
+ * with mouse clicks in rectangular areas. Currently, the only
+ * concrete class derived from this is FGLayeredInstrument, but others
+ * may show up in the future (some complex instruments could be
+ * entirely hand-coded, for example).
+ */
+class FGPanelInstrument : public SGConditional
+{
+public:
+ FGPanelInstrument ();
+ FGPanelInstrument (int x, int y, int w, int h);
+ virtual ~FGPanelInstrument ();
+
+ virtual void draw (osg::State& state) = 0;
+ virtual void drawHotspots(osg::State& state);
+
+ virtual void setPosition(int x, int y);
+ virtual void setSize(int w, int h);
+
+ virtual int getXPos () const;
+ virtual int getYPos () const;
+ virtual int getWidth () const;
+ virtual int getHeight () const;
+
+ // Coordinates relative to centre.
+ // Transfer pointer ownership!!
+ virtual void addAction (FGPanelAction * action);
+
+ // Coordinates relative to centre.
+ virtual bool doMouseAction (int button, int updown, int x, int y);
+
+protected:
+ int _x, _y, _w, _h;
+ typedef std::vector<FGPanelAction *> action_list_type;
+ action_list_type _actions;
+};
+
+
+/**
+ * An instrument constructed of multiple layers.
+ *
+ * Each individual layer can be rotated or shifted to correspond
+ * to internal FGFS instrument readings.
+ */
+class FGLayeredInstrument : public FGPanelInstrument
+{
+public:
+ FGLayeredInstrument (int x, int y, int w, int h);
+ virtual ~FGLayeredInstrument ();
+
+ virtual void draw (osg::State& state);
+
+ // Transfer pointer ownership!!
+ virtual int addLayer (FGInstrumentLayer *layer);
+ virtual int addLayer (const FGCroppedTexture &texture, int w = -1, int h = -1);
+
+ // Transfer pointer ownership!!
+ virtual void addTransformation (FGPanelTransformation * transformation);
+
+protected:
+ typedef std::vector<FGInstrumentLayer *> layer_list;
+ layer_list _layers;