1 // panel.hxx - generic support classes for a 2D panel.
3 // Written by David Megginson, started January 2000.
5 // This program is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU General Public License as
7 // published by the Free Software Foundation; either version 2 of the
8 // License, or (at your option) any later version.
10 // This program is distributed in the hope that it will be useful, but
11 // WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 # error This library requires C++
33 #include <simgear/compiler.h>
42 #include <simgear/math/interpolater.hxx>
43 #include <simgear/misc/props.hxx>
44 #include <simgear/timing/timestamp.hxx>
50 #include <Main/fgfs.hxx>
55 class FGPanelInstrument;
59 ////////////////////////////////////////////////////////////////////////
60 // Texture manager (should migrate out into FGFS).
62 // This class ensures that no texture is loaded more than once.
63 ////////////////////////////////////////////////////////////////////////
65 class FGTextureManager
68 static ssgTexture * createTexture(const string &relativePath);
70 static map<string,ssgTexture *> _textureMap;
75 ////////////////////////////////////////////////////////////////////////
76 // Cropped texture (should migrate out into FGFS).
78 // This structure wraps an SSG texture with cropping information.
79 ////////////////////////////////////////////////////////////////////////
81 class FGCroppedTexture
86 FGCroppedTexture (const string &path,
87 float _minX = 0.0, float _minY = 0.0,
88 float _maxX = 1.0, float _maxY = 1.0);
89 virtual ~FGCroppedTexture ();
91 virtual void setPath (const string &path) { _path = path; }
93 virtual const string &getPath () const { return _path; }
95 virtual ssgTexture * getTexture ();
97 virtual void setCrop (float minX, float minY, float maxX, float maxY) {
98 _minX = minX; _minY = minY; _maxX = maxX; _maxY = maxY;
101 virtual float getMinX () const { return _minX; }
102 virtual float getMinY () const { return _minY; }
103 virtual float getMaxX () const { return _maxX; }
104 virtual float getMaxY () const { return _maxY; }
109 ssgTexture * _texture;
110 float _minX, _minY, _maxX, _maxY;
115 ////////////////////////////////////////////////////////////////////////
116 // Instrument panel class.
118 // The panel is a container that has a background texture and holds
119 // zero or more instruments. The panel will order the instruments to
120 // redraw themselves when necessary, and will pass mouse clicks on to
121 // the appropriate instruments for processing.
122 ////////////////////////////////////////////////////////////////////////
124 class FGPanel : public FGSubsystem
128 FGPanel (int window_x, int window_y, int window_w, int window_h);
131 // Update the panel (every frame).
132 virtual void init ();
133 virtual void bind ();
134 virtual void unbind ();
135 virtual void update ();
137 // transfer pointer ownership!!!
138 virtual void addInstrument (FGPanelInstrument * instrument);
140 // Background texture.
141 virtual void setBackground (ssgTexture * texture);
143 // Make the panel visible or invisible.
144 virtual bool getVisibility () const;
145 virtual void setVisibility (bool visibility);
147 // Full width of panel.
148 virtual void setWidth (int width) { _width = width; }
149 virtual int getWidth () const { return _width; }
151 // Full height of panel.
152 virtual void setHeight (int height) { _height = height; }
153 virtual int getHeight () const { return _height; }
156 virtual void setXOffset (int offset);
157 virtual int getXOffset () const { return _x_offset; }
160 virtual void setYOffset (int offset);
161 virtual int getYOffset () const { return _y_offset; }
164 virtual void setViewHeight (int height) { _view_height = height; }
165 virtual int getViewHeight () const { return _view_height; }
167 // Handle a mouse click.
168 virtual bool doMouseAction (int button, int updown, int x, int y);
171 mutable bool _visibility;
172 mutable bool _mouseDown;
173 mutable int _mouseButton, _mouseX, _mouseY;
174 mutable int _mouseDelay;
175 mutable FGPanelInstrument * _mouseInstrument;
176 typedef vector<FGPanelInstrument *> instrument_list_type;
177 int _winx, _winy, _winw, _winh;
185 // List of instruments in panel.
186 instrument_list_type _instruments;
191 ////////////////////////////////////////////////////////////////////////
192 // Base class for user action types.
194 // Individual instruments can have actions associated with a mouse
195 // click in a rectangular area. Current concrete classes include
196 // FGAdjustAction, FGSwapAction, and FGToggleAction.
197 ////////////////////////////////////////////////////////////////////////
203 FGPanelAction (int button, int x, int y, int w, int h);
204 virtual ~FGPanelAction ();
207 virtual int getButton () const { return _button; }
208 virtual int getX () const { return _x; }
209 virtual int getY () const { return _y; }
210 virtual int getWidth () const { return _w; }
211 virtual int getHeight () const { return _h; }
214 virtual void setButton (int button) { _button = button; }
215 virtual void setX (int x) { _x = x; }
216 virtual void setY (int y) { _y = y; }
217 virtual void setWidth (int w) { _w = w; }
218 virtual void setHeight (int h) { _h = h; }
220 // Check whether we're in the area.
221 virtual bool inArea (int button, int x, int y)
223 return (button == _button &&
230 // Perform the action.
231 virtual void doAction () = 0;
243 ////////////////////////////////////////////////////////////////////////
244 // Adjustment action.
246 // This is an action to increase or decrease an FGFS value by a certain
247 // increment within a certain range. If the wrap flag is true, the
248 // value will wrap around if it goes below min or above max; otherwise,
249 // it will simply stop at min or max.
250 ////////////////////////////////////////////////////////////////////////
252 class FGAdjustAction : public FGPanelAction
255 FGAdjustAction (int button, int x, int y, int w, int h,
256 SGValue * value, float increment,
257 float min, float max, bool wrap=false);
258 virtual ~FGAdjustAction ();
259 virtual void doAction ();
271 ////////////////////////////////////////////////////////////////////////
274 // This is an action to swap two values. It's currently used in the
275 // navigation radios.
276 ////////////////////////////////////////////////////////////////////////
278 class FGSwapAction : public FGPanelAction
281 FGSwapAction (int button, int x, int y, int w, int h,
282 SGValue * value1, SGValue * value2);
283 virtual ~FGSwapAction ();
284 virtual void doAction ();
293 ////////////////////////////////////////////////////////////////////////
296 // This is an action to toggle a boolean value.
297 ////////////////////////////////////////////////////////////////////////
299 class FGToggleAction : public FGPanelAction
302 FGToggleAction (int button, int x, int y, int w, int h,
304 virtual ~FGToggleAction ();
305 virtual void doAction ();
313 ////////////////////////////////////////////////////////////////////////
314 // Abstract base class for a panel instrument.
316 // A panel instrument consists of zero or more actions, associated
317 // with mouse clicks in rectangular areas. Currently, the only
318 // concrete class derived from this is FGLayeredInstrument, but others
319 // may show up in the future (some complex instruments could be
320 // entirely hand-coded, for example).
321 ////////////////////////////////////////////////////////////////////////
323 class FGPanelInstrument
326 FGPanelInstrument ();
327 FGPanelInstrument (int x, int y, int w, int h);
328 virtual ~FGPanelInstrument ();
330 virtual void draw () = 0;
332 virtual void setPosition(int x, int y);
333 virtual void setSize(int w, int h);
335 virtual int getXPos () const;
336 virtual int getYPos () const;
337 virtual int getWidth () const;
338 virtual int getHeight () const;
340 // Coordinates relative to centre.
341 // Transfer pointer ownership!!
342 virtual void addAction (FGPanelAction * action);
344 // Coordinates relative to centre.
345 virtual bool doMouseAction (int button, int x, int y);
349 typedef vector<FGPanelAction *> action_list_type;
350 action_list_type _actions;
355 ////////////////////////////////////////////////////////////////////////
356 // Abstract base class for an instrument layer.
358 // The FGLayeredInstrument class builds up instruments by using layers
359 // of textures or text. Each layer can have zero or more
360 // transformations applied to it: for example, a needle layer can
361 // rotate to show the altitude or airspeed.
362 ////////////////////////////////////////////////////////////////////////
366 * A transformation for a layer.
368 class FGPanelTransformation {
377 FGPanelTransformation ();
378 virtual ~FGPanelTransformation ();
381 const SGValue * value;
386 SGInterpTable * table;
392 * A single layer of a multi-layered instrument.
394 * Each layer can be subject to a series of transformations based
395 * on current FGFS instrument readings: for example, a texture
396 * representing a needle can rotate to show the airspeed.
398 class FGInstrumentLayer
402 FGInstrumentLayer (int w = -1, int h = -1);
403 virtual ~FGInstrumentLayer ();
405 virtual void draw () = 0;
406 virtual void transform () const;
408 virtual int getWidth () const { return _w; }
409 virtual int getHeight () const { return _h; }
410 virtual void setWidth (int w) { _w = w; }
411 virtual void setHeight (int h) { _h = h; }
413 // Transfer pointer ownership!!
415 virtual void addTransformation (FGPanelTransformation * transformation);
420 typedef vector<FGPanelTransformation *> transformation_list;
421 transformation_list _transformations;
426 ////////////////////////////////////////////////////////////////////////
427 // An instrument composed of layers.
429 // This class represents an instrument which is simply a series of
430 // layers piled one on top of the other, each one undergoing its own
431 // set of transformations. For example, one layer can represent
432 // the instrument's face (which doesn't move), while the next layer
433 // can represent a needle that rotates depending on an FGFS variable.
434 ////////////////////////////////////////////////////////////////////////
438 * An instrument constructed of multiple layers.
440 * Each individual layer can be rotated or shifted to correspond
441 * to internal FGFS instrument readings.
443 class FGLayeredInstrument : public FGPanelInstrument
446 FGLayeredInstrument (int x, int y, int w, int h);
447 virtual ~FGLayeredInstrument ();
449 virtual void draw ();
451 // Transfer pointer ownership!!
452 virtual int addLayer (FGInstrumentLayer *layer);
453 virtual int addLayer (FGCroppedTexture &texture, int w = -1, int h = -1);
455 // Transfer pointer ownership!!
456 virtual void addTransformation (FGPanelTransformation * transformation);
459 typedef vector<FGInstrumentLayer *> layer_list;
465 ////////////////////////////////////////////////////////////////////////
466 // A textured layer of an instrument.
468 // This is a layer holding a single texture. Normally, the texture's
469 // backgound should be transparent so that lower layers and the panel
470 // background can show through.
471 ////////////////////////////////////////////////////////////////////////
473 class FGTexturedLayer : public FGInstrumentLayer
476 FGTexturedLayer (int w = -1, int h = -1) : FGInstrumentLayer(w, h) {}
477 FGTexturedLayer (const FGCroppedTexture &texture, int w = -1, int h = -1);
478 virtual ~FGTexturedLayer ();
480 virtual void draw ();
482 virtual void setTexture (const FGCroppedTexture &texture) {
485 virtual FGCroppedTexture &getTexture () { return _texture; }
486 virtual const FGCroppedTexture &getTexture () const { return _texture; }
489 mutable FGCroppedTexture _texture;
494 ////////////////////////////////////////////////////////////////////////
495 // A text layer of an instrument.
497 // This is a layer holding a string of static and/or generated text.
498 // It is useful for instruments that have text displays, such as
499 // a chronometer, GPS, or NavCom radio.
500 ////////////////////////////////////////////////////////////////////////
502 class FGTextLayer : public FGInstrumentLayer
505 typedef enum ChunkType {
513 Chunk (const string &text, const string &fmt = "%s");
514 Chunk (ChunkType type, const SGValue * value,
515 const string &fmt = "", float mult = 1.0);
517 const char * getValue () const;
521 const SGValue * _value;
524 mutable char _buf[1024];
527 FGTextLayer (int w = -1, int h = -1);
528 virtual ~FGTextLayer ();
530 virtual void draw ();
532 // Transfer pointer!!
533 virtual void addChunk (Chunk * chunk);
534 virtual void setColor (float r, float g, float b);
535 virtual void setPointSize (float size);
536 virtual void setFont (fntFont * font);
540 void recalc_value () const;
542 typedef vector<Chunk *> chunk_list;
548 mutable string _value;
549 mutable SGTimeStamp _then;
550 mutable SGTimeStamp _now;
555 ////////////////////////////////////////////////////////////////////////
556 // A layer that switches between two other layers.
557 ////////////////////////////////////////////////////////////////////////
559 class FGSwitchLayer : public FGInstrumentLayer
562 // Transfer pointers!!
563 FGSwitchLayer (int w, int h, const SGValue * value,
564 FGInstrumentLayer * layer1,
565 FGInstrumentLayer * layer2);
566 virtual ~FGSwitchLayer ();
568 virtual void draw ();
571 const SGValue * _value;
572 FGInstrumentLayer * _layer1, * _layer2;
577 ////////////////////////////////////////////////////////////////////////
579 ////////////////////////////////////////////////////////////////////////
581 bool fgPanelVisible ();
585 ////////////////////////////////////////////////////////////////////////
586 // The current panel, if any.
587 ////////////////////////////////////////////////////////////////////////
589 extern FGPanel * current_panel;
593 #endif // __PANEL_HXX