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搭建PVB架构，实现前端的基础布局、菜单、表格、图示等功能
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lixiaoyuan
146
libs/pvb/include/rllib/rlsvgvdi.h
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146
libs/pvb/include/rllib/rlsvgvdi.h
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/***************************************************************************
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rlsvgvdi.h - description
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-------------------
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begin : Tu Mar 22 2016
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copyright : (C) 2016 by R. Lehrig
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email : lehrig@t-online.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef _RL_SVGVDI_H_
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#define _RL_SVGVDI_H_
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#include <stdio.h>
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#include "rlstring.h"
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#include "rlspawn.h"
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#define MAXARRAY 1024*4 // maximum array size for line(x,y,n)
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#ifndef PROCESSVIEWSERVER_H
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/* font alignment */
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enum rlFontAlignment { /* */
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ALIGN_LEFT=0, /* example */
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ALIGN_CENTER, /* example */
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ALIGN_RIGHT, /* example */
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ALIGN_VERT_CENTER /* e */
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}; /* x */
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/* a */
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/* m */
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/* p */
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/* l */
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/* e */
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/* */
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/* linestyle for lines in axis */
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enum rlLinestyle {
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LINESTYLE_NONE=0,
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LINESTYLE_CIRCLE,
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LINESTYLE_CROSS,
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LINESTYLE_RECT,
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LINESTYLE_CIRCLE_NO_LINE,
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LINESTYLE_CROSS_NO_LINE,
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LINESTYLE_RECT_NO_LINE
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};
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#endif
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/*! <pre>
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class for drawing xy-graphics and any svg graphics either on the client or on the server.
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SVG (Tiny) is a flexible and powerfull graphics format.
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- It can be rendered on a pvbrowser DrawWidget on the client,
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where the user will also be able to interact with the SVG (example: clicking on named objects within the SVG)
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- It can be rendered into another format by SVG converters on the server and/or the client
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- It can be used to implement scalable user interfaces especially when using on mobile devices
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rlSvgVdi brings some conveniance functions to draw xy-graphics with SVG and
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some general SVG interface functions, that produce SVG content directly.
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The Output might be send to File/Socket/stdout or simply collected as a rlString with all the generated SVG.
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See example within pvbaddon/demos/rlsvgvdi
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HINT 1: Use rlSpawn and the rlsvgcat utility to read static SVG templates and insert the content generated by rlSvgVdi dynamically into the output stream.
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You might use comment strings within the SVG for controlling the filter pipeline.
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HINT 2: Use this class for the purpose of generating reports in pdf
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HINT 3: Use SVG converters with a commandline interface to convert SVG to png, jpg, pdf ...
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Examples: rsvg, imagemagick
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https://wiki.gnome.org/action/show/Projects/LibRsvg
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http://imagemagick.org/script/index.php
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</pre> */
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class rlSvgVdi
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{
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public:
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rlSvgVdi();
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~rlSvgVdi();
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int setOutput(int *socket_out, int idForPvbrowser=0);
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int setOutput(FILE *fout);
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int setOutput(const char *outputfilename);
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int setOutput(rlSpawn *pipe);
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int endOutput();
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const char *svgHeader(int width=1280, int height=1024, int rbackground=255, int gbackground=255, int bbackground=255);
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const char *svgTrailer();
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const char *drawEllipse(int x, int y, int rx, int ry);
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const char *moveTo(int x, int y);
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const char *lineTo(int x, int y);
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const char *line(int x1, int y1, int x2, int y2);
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const char *text(int x, int y, const char *text, int alignment=ALIGN_LEFT);
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const char *textInAxis(float x, float y, const char *text, int alignment);
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const char *box(int x, int y, int w, int h);
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const char *boxWithText(int x, int y, int w, int h, int fontsize, const char *xlabel, const char *ylabel, const char * rylabel);
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const char *rect(int x, int y, int w, int h);
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const char *xAxis(float start, float delta, float end, int draw=1);
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const char *yAxis(float start, float delta, float end, int draw=1);
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const char *xGrid();
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const char *yGrid();
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const char *rightYAxis(float start, float delta, float end, int draw=1);
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const char *drawSymbol(int x, int y, int type);
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const char *line(float *x, float *y, int n, int linestayle=LINESTYLE_NONE);
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const char *setColor(int r, int g, int b);
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const char *setFont(const char *family, int size, int weight, int italic);
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const char *setWidth(int w);
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const char *setLinestyle(const char *dasharray);
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const char *comment(const char *text);
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const char *svg_put(const char *text);
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const char *svg_printf(const char *format, ...);
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const char *svg_d(int *x, int *y, int count);
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const char *svg_points(int *x, int *y, int count);
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int outputState;
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int getFontsize();
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int getBoxX();
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int getBoxY();
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int getBoxW();
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int getBoxH();
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private:
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int *sout;
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FILE *fout;
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rlSpawn *pipe;
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rlString filename, outputfilename;
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int idForPvbrowser;
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rlString svg, svg2, svg3, fontstring;
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char stroke[16];
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int width;
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rlString dasharray;
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rlString lineoptions, textoptions;
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int perhapsSend(const char *text);
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int xold, yold;
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float xmin,dx,xmax;
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float ymin,dy,ymax;
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int tx(float x);
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int ty(float y);
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int boxx,boxy,boxw,boxh;
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int fontsize;
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int sr; // symbol radius
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char floatFormat[80];
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};
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#endif
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