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/*
* Copyright (c) 1991,1993 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory.
* 4. Neither the name of the University nor of the Laboratory may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#) $Header: /cvsroot/nsnam/nam-1/view.cc,v 1.31 2011/11/02 16:08:04 tom_henderson Exp $ (LBL)
*/
#include <stdlib.h>
#ifdef WIN32
#include <windows.h>
#endif
#include <ctype.h>
#include <math.h>
#include <tclcl.h>
#include "view.h"
#include "bbox.h"
#include "netview.h"
#include "netmodel.h"
#include "tclcl.h"
#include "paint.h"
#include "packet.h"
// Create list of font names and sizes
static char * fontName[NFONT] = {
"-adobe-times-medium-r-normal-*-8-*-*-*-*-*-*-*",
"-adobe-times-medium-r-normal-*-10-*-*-*-*-*-*-*",
"-adobe-times-medium-r-normal-*-12-*-*-*-*-*-*-*",
"-adobe-times-medium-r-normal-*-14-*-*-*-*-*-*-*",
"-adobe-times-medium-r-normal-*-18-*-*-*-*-*-*-*",
"-adobe-times-medium-r-normal-*-20-*-*-*-*-*-*-*",
"-adobe-times-medium-r-normal-*-24-*-*-*-*-*-*-*",
"-adobe-times-medium-r-normal-*-34-*-*-*-*-*-*-*"
};
// Convert a string to world coordinates
int View::getCoord(char *strx, char *stry, float &dx, float &dy) {
Tcl& tcl = Tcl::instance();
double tx, ty;
if ((Tk_GetScreenMM(tcl.interp(), tk_, strx, &tx) != TCL_OK) ||
(Tk_GetScreenMM(tcl.interp(), tk_, stry, &ty) != TCL_OK)) {
return TCL_ERROR;
}
tx *= pixelsPerMM_;
ty *= pixelsPerMM_;
dx = tx, dy = ty;
matrix_.imap(dx, dy);
return TCL_OK;
}
void View::zoom(float mag)
{
magnification_ *= mag;
resize(width_, height_);
}
//---------------------------------------------------------------------
// void
// View::resize(int width, int height)
// - resize the display canvas and setup the mapping between
// world and screen coordinate systems
//---------------------------------------------------------------------
void View::resize(int width, int height) {
width_ = width;
height_ = height;
matrix_.clear();
BBox bb;
// a model can choose to use these values, or can set its own
// NetModel sets it to bb.clear(), while GraphView use this
bb.xmin = 0;
bb.ymin = 0;
bb.xmax = width;
bb.ymax = height;
// WorldBox refers to the boundaries for the network model world
// Basically NetView and EditView used to return the bounding box
// for NetModel not for themselves so now BoundingBox returns
// values based on the canvas size and getWorldBox returns the
// NetModel values.
getWorldBox(bb);
// BoundingBox(bb);
double x = (0.0 - panx_) * width;
double y = (0.0 - pany_) * height;
double w = width;
double h = height;
/*
* Set up a transform that maps bb -> canvas. I.e,
* bb -> unit square -> allocation, but which retains
* the aspect ratio. Also, add a margin.
*/
double world_width = bb.xmax - bb.xmin;
double world_height = bb.ymax - bb.ymin;
/*
* Grow a margin if we asked for square aspect ratio.
*/
double bbw;
double bbh;
if (aspect_ == SQUARE) {
bbw = 1.1 * world_width;
bbh = 1.1 * world_height;
// bbw = world_width;
// bbh = world_width*height/width;
// if (bbh < world_height) {
// Need to scale in the other direction
// bbw = world_height*width/height;
// bbh = world_height;
// }
} else {
bbw = world_width;
bbh = world_height;
}
// Calculate the width and height for translating x and y axis
double tx = bb.xmin - 0.5 * (bbw - world_width);
double ty = bb.ymin - 0.5 * (bbh - world_height);
// move base coordinate system to origin
matrix_.translate(-tx, -ty);
// flip vertical axis because Y is backwards.
matrix_.scale(1.0, -1.0);
matrix_.translate(0., bbh);
double ws = w / bbw;
double hs = h / bbh;
// The matrix_.translate(x expression, y expression) takes care of
// scrolling when clicking on the scroll bars
if (aspect_ == SQUARE) {
if (ws <= hs) {
matrix_.scale(ws, ws);
matrix_.translate(x, y + 0.5 * (h - ws * bbh));
} else {
matrix_.scale(hs, hs);
matrix_.translate(x + 0.5 * (w - hs * bbw), y);
}
} else {
matrix_.scale(ws, hs);
matrix_.translate(x, y);
}
if (offscreen_ != 0)
Tk_FreePixmap(Tk_Display(tk_), offscreen_);
if ((width_<=0) || (height_<=0))
abort();
// Create a new offscreen canvas for double buffered drawing
offscreen_ = Tk_GetPixmap(Tk_Display(tk_), Tk_WindowId(tk_),
width_, height_, Tk_Depth(tk_));
// Scale for any magnification
matrix_.scale(magnification_, magnification_);
if (xscroll_ != NULL) {
Tcl& tcl = Tcl::instance();
tcl.evalf("%s set %f %f", xscroll_, panx_,
panx_+(1.0/magnification_));
}
if (yscroll_ != NULL) {
Tcl& tcl = Tcl::instance();
tcl.evalf("%s set %f %f", yscroll_, pany_,
pany_+(1.0/magnification_));
}
pixelsPerMM_ = WidthOfScreen(Tk_Screen(tk_)) /
WidthMMOfScreen(Tk_Screen(tk_));
if (!bClip_) {
clip_.xmin = 0;
clip_.ymin = 0;
clip_.xmax = width_;
clip_.ymax = height_;
}
}
//---------------------------------------------------------------------
// void
// View::draw()
// - Does double buffered drawing
// All objects are drawn to an offscreen area and then the whole
// offscreen area is copied to the current view --mehringe@isi.edu
// - render is in a sub class of View
//---------------------------------------------------------------------
void
View::draw() {
if (offscreen_ == 0) {
return;
}
// Clear offscreen bitmap
XFillRectangle(Tk_Display(tk_), offscreen_, background_,
0, 0, width_, height_);
// Draw objects onto offscreen bitmap
render();
// Copy over offscreen bitmap to current view
XCopyArea(Tk_Display(tk_), offscreen_, Tk_WindowId(tk_), background_,
0, 0, width_, height_, 0, 0);
}
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
View::View(const char* name, int aspect, int width, int height) :
next_(NULL),
magnification_(1.0),
panx_(0.0),
pany_(0.0),
aspect_(aspect),
xscroll_(NULL),
yscroll_(NULL),
bClip_(0) {
Tcl& tcl = Tcl::instance();
tk_ = Tk_CreateWindowFromPath(tcl.interp(), tcl.tkmain(),
(char *) name, 0);
if (tk_) {
Tk_SetClass(tk_, "NetView");
/*XXX*/
/* Specify preferred window size. */
Tk_GeometryRequest(tk_, width, height);
Tk_CreateEventHandler(tk_, ExposureMask|StructureNotifyMask,
handle, (ClientData)this);
Tk_MakeWindowExist(tk_);
pixelsPerMM_ = WidthOfScreen(Tk_Screen(tk_)) /
WidthMMOfScreen(Tk_Screen(tk_));
} else {
// Just an arbitrary initialization
pixelsPerMM_ = 1;
}
width_ = height_ = 0;
background_ = Paint::instance()->background_gc();
offscreen_ = 0;
load_fonts();
}
View::~View()
{
/*
* Do not do Tk_DestroyWindow() stuff. Should *never* use
* delete <view> to destroy a view
*/
if (tk_ != 0) {
if (offscreen_ != 0)
Tk_FreePixmap(Tk_Display(tk_), offscreen_);
free_fonts();
}
tk_ = 0;
}
//----------------------------------------------------------------------
// void
// View::BoundingBox(BBox& destination)
//
//----------------------------------------------------------------------
void
View::BoundingBox(BBox& destination) {
fprintf(stderr,"View::BoundingBox\n");
}
void View::setClipRect(BBox &b)
{
XRectangle rect;
Paint* paint = Paint::instance();
clip_ = b;
bClip_ = 1;
clip_.xmin = clip_.ymin = 0;
clip_.xmax = (float)width_;
clip_.ymax = (float)height_;
b.xrect(rect);
#ifndef WIN32
for (int i = 0; i < paint->num_gc(); i++) {
XSetClipRectangles(Tk_Display(tk_), paint->paint_to_gc(i),
0, 0, &rect, 1, Unsorted);
}
#endif
}
void View::clearClipRect()
{
Paint* paint = Paint::instance();
#ifndef WIN32
for (int i = 0; i < paint->num_gc(); i++) {
// XXX Or should I set it to the whole window???
XSetClipRectangles(Tk_Display(tk_), paint->paint_to_gc(i),
0, 0, None, 1, Unsorted);
}
#endif
bClip_ = 0;
}
void View::setFunction(int func)
{
Paint* paint = Paint::instance();
for (int i = 0; i < paint->num_gc(); i++)
XSetFunction(Tk_Display(tk_), paint->paint_to_gc(i), func);
}
/* Handler for the Expose, DestroyNotify and ConfigureNotify events. */
void View::handle(ClientData cd, XEvent* ep)
{
View* nv = (View*)cd;
switch (ep->type) {
case Expose:
if (ep->xexpose.count == 0)
/*XXX*/
nv->draw();
break;
case DestroyNotify:
/*XXX kill ourself */
/*XXX: this should kill the viewer! */
/*XXX how about use delete this? */
if (nv->tk_ != 0) {
if (nv->offscreen_ != 0)
Tk_FreePixmap(Tk_Display(nv->tk_),
nv->offscreen_);
nv->free_fonts();
}
nv->tk_ = 0;
delete nv;
break;
case ConfigureNotify:
if (nv->width_ != ep->xconfigure.width ||
nv->height_ != ep->xconfigure.height) {
//if it gets smaller, there will be no expose event,
//so we have to draw it outselves - mjh
int smaller=0;
if ((nv->width_ >= ep->xconfigure.width) &&
(nv->height_ >= ep->xconfigure.height))
smaller=1;
nv->resize(ep->xconfigure.width,
ep->xconfigure.height);
if (smaller)
nv->draw();
}
break;
}
}
int View::command(ClientData cd, Tcl_Interp* tcl, int argc, CONST84 char **argv)
{
NetView *nv = (NetView *)cd;
if (argc < 2) {
Tcl_AppendResult(tcl, "\"", argv[0], "\": arg mismatch", 0);
return (TCL_ERROR);
}
if (strcmp(argv[1], "xscroll") == 0) {
if (argc == 3) {
nv->xscroll_=new char[strlen(argv[2])+1];
strcpy(nv->xscroll_, argv[2]);
return TCL_OK;
} else {
Tcl_AppendResult(tcl, "\"", argv[0],
"\": arg mismatch", 0);
return TCL_ERROR;
}
}
if (strcmp(argv[1], "yscroll") == 0) {
if (argc == 3) {
nv->yscroll_=new char[strlen(argv[2])+1];
strcpy(nv->yscroll_, argv[2]);
return TCL_OK;
} else {
Tcl_AppendResult(tcl, "\"", argv[0],
"\": arg mismatch", 0);
return TCL_ERROR;
}
}
if (strcmp(argv[1], "zoom") == 0) {
if (argc == 3) {
float mag=atof(argv[2]);
if (mag>1.0) {
nv->panx_+=(1.0-1.0/mag)/(2.0*nv->magnification_);
nv->pany_+=(1.0-1.0/mag)/(2.0*nv->magnification_);
} else {
nv->panx_-=(1.0-mag)/(2.0*nv->magnification_*mag);
nv->pany_-=(1.0-mag)/(2.0*nv->magnification_*mag);
}
nv->zoom(mag);
nv->draw();
//nv->pan(panx, pany);
return TCL_OK;
} else {
Tcl_AppendResult(tcl, "\"", argv[0],
"\": arg mismatch", 0);
return TCL_ERROR;
}
}
if ((strcmp(argv[1], "xview") == 0) ||
(strcmp(argv[1], "yview") == 0)) {
if ((argc==4) && (strcmp(argv[2], "moveto")==0)) {
if (strcmp(argv[1], "xview") == 0)
nv->panx_=atof(argv[3]);
else
nv->pany_=atof(argv[3]);
nv->resize(nv->width_, nv->height_);
nv->draw();
} else if ((argc==5) && (strcmp(argv[2], "scroll")==0)) {
float step = atof(argv[3]);
if (strcmp(argv[4], "units")==0) {
step *= 0.05/nv->magnification_;
} else if (strcmp(argv[4], "pages")==0) {
step *= 0.8/nv->magnification_;
} else if (strcmp(argv[4], "world")==0) {
// Used for canvas grab style dragging
// float x0, y0, x_step, y_step;
// nv->matrix_.map(0.0, 0.0, x0, y0);
// if (strcmp(argv[1], "xview") == 0) {
// nv->matrix_.map(step, 0.0, x_step, y_step);
// step = x0 - x_step;
// } else {
// nv->matrix_.map(step, 0.0, x_step, y_step);
// step = y0 - y_step;
// }
step /= nv->magnification_;
}
if (strcmp(argv[1], "xview") == 0)
nv->panx_ += step;
else
nv->pany_ += step;
// fprintf(stderr, "View::command pan %f,%f\n",nv->panx_,nv->pany_);
nv->resize(nv->width_, nv->height_);
nv->draw();
} else if ((argc == 7) && (strcmp(argv[2], "grab") == 0)) {
float world_x_start, world_y_start;
nv->matrix_.imap(atof(argv[3]), atof(argv[4]),
world_x_start, world_y_start);
} else {
Tcl_AppendResult(tcl, "\"", argv[0],
"\": arg mismatch", 0);
return TCL_ERROR;
}
return TCL_OK;
}
Tcl_AppendResult(tcl, "\"", argv[0], "\": unknown arg: ", argv[1], 0);
return (TCL_ERROR);
}
void
View::line(float x0, float y0, float x1, float y1, int paint)
{
int ax, ay;
matrix_.map(x0, y0, ax, ay);
int bx, by;
matrix_.map(x1, y1, bx, by);
GC gc = Paint::instance()->paint_to_gc(paint);
XDrawLine(Tk_Display(tk_), offscreen_, gc, ax, ay, bx, by);
}
void View::rect(float x0, float y0, float x1, float y1, int paint)
{
int x, y;
matrix_.map(x0, y0, x, y);
int xx, yy;
matrix_.map(x1, y1, xx, yy);
int w = xx - x;
if (w < 0) {
x = xx;
w = -w;
}
int h = yy - y;
if (h < 0) {
h = -h;
y = yy;
}
GC gc = Paint::instance()->paint_to_gc(paint);
XDrawRectangle(Tk_Display(tk_), offscreen_, gc, x, y, w, h);
}
void View::polygon(const float* x, const float* y, int n, int paint)
{
/*XXX*/
XPoint pts[10];
for (int i = 0; i < n; ++i) {
float tx, ty;
matrix_.map(x[i], y[i], tx, ty);
pts[i].x = int(tx);
pts[i].y = int(ty);
}
pts[n] = pts[0];
GC gc = Paint::instance()->paint_to_gc(paint);
XDrawLines(Tk_Display(tk_), offscreen_, gc, pts, n + 1,
CoordModeOrigin);
}
void View::fill(const float* x, const float* y, int n, int paint)
{
/*XXX*/
XPoint pts[10];
for (int i = 0; i < n; ++i) {
float tx, ty;
matrix_.map(x[i], y[i], tx, ty);
pts[i].x = int(tx);
pts[i].y = int(ty);
}
pts[n] = pts[0];
GC gc = Paint::instance()->paint_to_gc(paint);
XFillPolygon(Tk_Display(tk_), offscreen_, gc, pts, n + 1,
Convex, CoordModeOrigin);
}
//----------------------------------------------------------------------
//
//----------------------------------------------------------------------
void View::circle(float x, float y, float r, int paint) {
int tx, ty; // Translated x and y
int tr, dummy; // Translated radius
// Map world coordinates to current view coordinates
matrix_.map(x, y, tx, ty);
matrix_.map(x + r, y, tr, dummy);
// fprintf(stderr, "View::circle x %f y %f tx %d ty %d\n", x,y,tx,ty);
// XDrawArc starts from the corner so we have to
// move the tx and ty coordinates from the center
// of the circle to the corner
tr -= tx;
tx -= tr;
ty -= tr;
// We want tr to be the diameter of the arc
tr *= 2;
GC gc = Paint::instance()->paint_to_gc(paint);
XDrawArc(Tk_Display(tk_), offscreen_, gc, tx, ty, tr, tr, 0, 64 * 360);
}
//----------------------------------------------------------------------
// void
// View::load_fonts()
// - Set the font structures using values in 'fontName'(defined above)
//----------------------------------------------------------------------
void
View::load_fonts() {
Tcl_Interp* tcl;
nfont_ = 0;
if (tk_) {
tcl = Tcl::instance().interp();
// Load each font described in fontName[]
for (int i = 0; i < NFONT; ++i) {
fonts_[nfont_] = Tk_GetFont(tcl, tk_, fontName[i]);
if (fonts_[nfont_] == 0) {
fprintf(stderr, "Unable to load font: %s\n",fontName[i]);
continue;
}
font_gc_[nfont_] = Paint::instance()->text_gc(Tk_FontId(fonts_[nfont_]));
++nfont_;
}
if (nfont_ == 0) {
fprintf(stderr, "nam: warning no fonts found\n");
} else {
default_font_ = TIMES_14POINT;
}
}
}
void View::free_fonts()
{
/*XXX Tk_FreeFontStruct*/
for (int i = 0; i < NFONT; i++) {
Tk_FreeFont(fonts_[i]);
}
}
//----------------------------------------------------------------------
// int
// View::lookup_font(int d)
// - returns the index into the fonts_ array that is smaller in size
// than d
// - returns -1 if nfont_ is 0 which indicates that no fonts have been
// loaded
//----------------------------------------------------------------------
int
View::lookup_font(int d) {
int i = nfont_;
while (--i > 0) {
Tk_Font f = fonts_[i];
Tk_FontMetrics p;
Tk_GetFontMetrics(f, &p);
if (d >= p.ascent + p.descent) {
return (i);
}
}
if (nfont_) {
return 0;
}
return -1;
}
//----------------------------------------------------------------------
// int
// View::getStringScreenWidth(char * text, double screen_height)
// - Calculate the width of a string in screen coordinates based upon
// the font size selected by the height of the string
//----------------------------------------------------------------------
int
View::getStringScreenWidth(const char * text, int screen_height) {
int font_id;
font_id = lookup_font(screen_height);
if (font_id != -1) {
return Tk_TextWidth(fonts_[lookup_font(screen_height)],
text, strlen(text));
} else {
return 0;
}
}
//----------------------------------------------------------------------
// double
// View::getStringWidth(char * text, double world_height)
// - calculates a strings width and returns it in world size
//----------------------------------------------------------------------
double
View::getStringWidth(const char * text, double world_height) {
float x_min, x_max, y_min, y_max, discarded;
double world_width;
int screen_height, screen_width;
matrix_.map(0.0, 0.0, discarded, y_min);
matrix_.map(0.0, world_height, discarded, y_max);
screen_height = (int) ceil(y_min - y_max);
screen_width = getStringScreenWidth(text, screen_height);
matrix_.imap(0.0, 0.0, x_min, discarded);
matrix_.imap((float) screen_width, 0.0, x_max, discarded);
world_width = x_max - x_min;
return world_width;
}
//----------------------------------------------------------------------
//
//----------------------------------------------------------------------
int
View::getStringHeight(char * text) {
return 0;
}
//-----------------------------------------------------------------------
// void
// View::string(float fx, float fy, float dim, const char* s,
// int anchor, const char* color)
// - This draws a string on the view
// - Whoever wrote this code should be shot. For anyone who is
// working on nam in the future. Read this:
// PUT SOME COMMENTS IN YOUR CODE!!!
// and I don't mean comments like this is a hack or this
// code is bad.
// Also, USE DESCRIPTIVE VARIBALE NAMES!!! Don't use just i or
// f or d, dlow, dhigh or just p. What the does that stand for?
// - This code is driving me insane because I have to rewrite and
// comment everything just to understand what the hell the person
// before me was trying to do.
//----------------------------------------------------------------------
void
View::string(float fx, float fy, float dim, const char* s,
int anchor, const char* color) {
if (nfont_ <= 0)
return;
int dummy;
int dlow, dhigh;
//Tcl& tcl = Tcl::instance();
/*XXX this could be cached*/
matrix_.map(0., 0., dummy, dlow);
matrix_.map(0., 0.9 * dim, dummy, dhigh);
int d = dhigh - dlow;
if (d < 0)
d = -d;
int font = lookup_font(d);
Tk_Font f = fonts_[font];
Tk_FontMetrics p;
Tk_GetFontMetrics(f, &p);
int h = p.ascent;
int len = strlen(s);
int w = Tk_TextWidth(f, s, len);
int x, y;
matrix_.map(fx, fy, x, y);
/* XXX still need to adjust for mismatch between d and actual height*/
switch (anchor) {
case ANCHOR_CENTER:
x -= w / 2;
y += h / 2;
break;
case ANCHOR_NORTH:
x -= w / 2;
y += d;
break;
case ANCHOR_SOUTH:
x -= w / 2;
y -= h/2;
break;
case ANCHOR_WEST:
y += h / 2;
break;
case ANCHOR_EAST:
x -= w;
y += h / 2;
break;
}
// XXX Very very very bad hack. Should go through Paint::text_gc()!!
//Colormap cmap;
//Tk_Uid colorname;
GC fgc = font_gc_[font]; // Font gc
if (color != NULL) {
fgc = Paint::instance()->text_gc(Tk_FontId(fonts_[font]), color);
}
Tk_DrawChars(Tk_Display(tk_), offscreen_, fgc, f, s, len, x, y);
if (color != NULL) {
Tk_FreeGC(Tk_Display(tk_), fgc);
}
// XXX We don't free the color allocated above. Hope it won't
// be a problem!
}
//----------------------------------------------------------------------
//
//----------------------------------------------------------------------
int
View::string(const char * text, double world_x, double world_y,
double size, const char * color) {
int screen_x, screen_y, font_index;
Tk_Font font;
Tk_FontMetrics font_metrics;
int width;
GC font_gc;
int dummy, y_min, y_max;
width = 0;
if (nfont_ > 0) {
matrix_.map(world_x, world_y, screen_x, screen_y);
// Find screen height of box
matrix_.map(0., 0., dummy, y_min);
matrix_.map(0., 0.9 * size, dummy, y_max);
int height = y_max - y_min ;
if (height < 0) {
height = -1*height;
}
font_index = lookup_font(height);
//font_index = TIMES_14POINT;
font = fonts_[font_index];
Tk_GetFontMetrics(font, &font_metrics);
font_gc = font_gc_[font_index]; // Font gc
if (color) {
font_gc = Paint::instance()->text_gc(Tk_FontId(font), color);
}
width = Tk_TextWidth(font, text, strlen(text));
Tk_DrawChars(Tk_Display(tk_), offscreen_, font_gc, font, text,
strlen(text), screen_x, screen_y);
if (color) {
Tk_FreeGC(Tk_Display(tk_), font_gc);
}
}
return width;
}
//----------------------------------------------------------------------
//----------------------------------------------------------------------
void
View::boxedString(const char * text, double world_x, double world_y,
double vertical_size, int paint,
const char * color) {
float box_width, text_width;
float x_padding, y_padding;
box_width = getStringWidth(text, vertical_size);
text_width = getStringWidth(text, 0.9*vertical_size);
x_padding = (box_width - text_width)/2.0;
y_padding = 0.05*vertical_size;
string(text, world_x + x_padding, world_y + y_padding, 0.9*vertical_size, color);
rect(world_x, world_y, world_x + box_width, world_y + vertical_size, paint);
}
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