112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
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//
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// Written by David Megginson, started January 2000.
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// Adopted for standalone fgpanel application by Torsten Dreyer, August 2009
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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#ifndef FGTEXTLAYER_HXX
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#define FGTEXTLAYER_HXX
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#include <string>
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#include <simgear/timing/timestamp.hxx>
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#include "FGFontCache.hxx"
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#include "FGInstrumentLayer.hxx"
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using namespace std;
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/**
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* A text layer of an instrument.
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*
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* This is a layer holding a string of static and/or generated text.
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* It is useful for instruments that have text displays, such as
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* a chronometer, GPS, or NavCom radio.
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*/
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class FGTextLayer : public FGInstrumentLayer {
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public:
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enum ChunkType {
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TEXT,
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TEXT_VALUE,
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DOUBLE_VALUE
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};
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class Chunk : public SGConditional {
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public:
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Chunk (const string &text,
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const string &fmt = "%s");
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Chunk (const ChunkType type,
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const SGPropertyNode *node,
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const string &fmt = "",
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const float mult = 1.0,
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const float offs = 0.0,
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const bool truncation = false);
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const char *getValue () const;
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private:
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ChunkType m_type;
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string m_text;
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SGConstPropertyNode_ptr m_node;
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string m_fmt;
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float m_mult;
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float m_offs;
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bool m_trunc;
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mutable char m_buf[1024];
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};
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static bool Init ();
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FGTextLayer (const int w = -1, const int h = -1);
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virtual ~FGTextLayer ();
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virtual void draw ();
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// Transfer pointer!!
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virtual void addChunk (Chunk * const chunk);
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virtual void setColor (const float r,
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const float g,
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const float b);
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virtual void setPointSize (const float size);
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virtual void setFontName (const string &name);
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private:
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void recalc_value () const;
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typedef vector<Chunk *> chunk_list;
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chunk_list m_chunks;
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float m_color[4];
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float m_pointSize;
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static SGPath The_Font_Path;
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mutable string m_font_name;
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mutable string m_value;
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mutable SGTimeStamp m_then;
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mutable SGTimeStamp m_now;
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static FGFontCache The_Font_Cache;
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static GLuint Text_Layer_Program_Object;
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static GLint Text_Layer_Position_Loc;
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static GLint Text_Layer_Tex_Coord_Loc;
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static GLint Text_Layer_MVP_Loc;
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static GLint Text_Layer_Sampler_Loc;
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static GLint Text_Layer_Color_Loc;
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};
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#endif
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