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view draw.c @ 8:7066ff2fe8bc

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added key handling
author Anselm R. Garbe <garbeam@wmii.de>
date Tue, 11 Jul 2006 11:50:18 +0200
parents e5018cae273f
children e8f627998d6f
line source
1 /*
2 * (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
3 * See LICENSE file for license details.
4 */
5
6 #include <stdio.h>
7 #include <string.h>
8
9 #include "draw.h"
10 #include "util.h"
11
12 static void
13 drawborder(Display *dpy, Brush *b)
14 {
15 XPoint points[5];
16 XSetLineAttributes(dpy, b->gc, 1, LineSolid, CapButt, JoinMiter);
17 XSetForeground(dpy, b->gc, b->border);
18 points[0].x = b->rect.x;
19 points[0].y = b->rect.y;
20 points[1].x = b->rect.width - 1;
21 points[1].y = 0;
22 points[2].x = 0;
23 points[2].y = b->rect.height - 1;
24 points[3].x = -(b->rect.width - 1);
25 points[3].y = 0;
26 points[4].x = 0;
27 points[4].y = -(b->rect.height - 1);
28 XDrawLines(dpy, b->drawable, b->gc, points, 5, CoordModePrevious);
29 }
30
31 void
32 draw(Display *dpy, Brush *b, Bool border, const char *text)
33 {
34 unsigned int x, y, w, h, len;
35 static char buf[256];
36 XGCValues gcv;
37
38 XSetForeground(dpy, b->gc, b->bg);
39 XFillRectangles(dpy, b->drawable, b->gc, &b->rect, 1);
40
41 if(border)
42 drawborder(dpy, b);
43
44 if(!text)
45 return;
46
47 len = strlen(text);
48 if(len >= sizeof(buf))
49 len = sizeof(buf) - 1;
50 memcpy(buf, text, len);
51 buf[len] = 0;
52
53 h = b->font.ascent + b->font.descent;
54 y = b->rect.y + (b->rect.height / 2) - (h / 2) + b->font.ascent;
55 x = b->rect.x + (h / 2);
56
57 /* shorten text if necessary */
58 while(len && (w = textwidth_l(&b->font, buf, len)) > b->rect.width - h)
59 buf[--len] = 0;
60
61 if(w > b->rect.width)
62 return; /* too long */
63
64 gcv.foreground = b->fg;
65 gcv.background = b->bg;
66 if(b->font.set) {
67 XChangeGC(dpy, b->gc, GCForeground | GCBackground, &gcv);
68 XmbDrawImageString(dpy, b->drawable, b->font.set, b->gc,
69 x, y, buf, len);
70 }
71 else {
72 gcv.font = b->font.xfont->fid;
73 XChangeGC(dpy, b->gc, GCForeground | GCBackground | GCFont, &gcv);
74 XDrawImageString(dpy, b->drawable, b->gc, x, y, buf, len);
75 }
76 }
77
78 static unsigned long
79 xloadcolors(Display *dpy, Colormap cmap, const char *colstr)
80 {
81 XColor color;
82 XAllocNamedColor(dpy, cmap, colstr, &color, &color);
83 return color.pixel;
84 }
85
86 void
87 loadcolors(Display *dpy, int screen, Brush *b,
88 const char *bg, const char *fg, const char *border)
89 {
90 Colormap cmap = DefaultColormap(dpy, screen);
91 b->bg = xloadcolors(dpy, cmap, bg);
92 b->fg = xloadcolors(dpy, cmap, fg);
93 b->border = xloadcolors(dpy, cmap, border);
94 }
95
96 unsigned int
97 textwidth_l(Fnt *font, char *text, unsigned int len)
98 {
99 if(font->set) {
100 XRectangle r;
101 XmbTextExtents(font->set, text, len, 0, &r);
102 return r.width;
103 }
104 return XTextWidth(font->xfont, text, len);
105 }
106
107 unsigned int
108 textwidth(Fnt *font, char *text)
109 {
110 return textwidth_l(font, text, strlen(text));
111 }
112
113 void
114 loadfont(Display *dpy, Fnt *font, const char *fontstr)
115 {
116 char **missing, *def;
117 int n;
118
119 missing = NULL;
120 def = "?";
121 setlocale(LC_ALL, "");
122 if(font->set)
123 XFreeFontSet(dpy, font->set);
124 font->set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
125 if(missing) {
126 while(n--)
127 fprintf(stderr, "missing fontset: %s\n", missing[n]);
128 XFreeStringList(missing);
129 if(font->set) {
130 XFreeFontSet(dpy, font->set);
131 font->set = NULL;
132 }
133 }
134 if(font->set) {
135 XFontSetExtents *font_extents;
136 XFontStruct **xfonts;
137 char **font_names;
138 unsigned int i;
139
140 font->ascent = font->descent = 0;
141 font_extents = XExtentsOfFontSet(font->set);
142 n = XFontsOfFontSet(font->set, &xfonts, &font_names);
143 for(i = 0, font->ascent = 0, font->descent = 0; i < n; i++) {
144 if(font->ascent < (*xfonts)->ascent)
145 font->ascent = (*xfonts)->ascent;
146 if(font->descent < (*xfonts)->descent)
147 font->descent = (*xfonts)->descent;
148 xfonts++;
149 }
150 }
151 else {
152 if(font->xfont)
153 XFreeFont(dpy, font->xfont);
154 font->xfont = NULL;
155 font->xfont = XLoadQueryFont(dpy, fontstr);
156 if (!font->xfont)
157 font->xfont = XLoadQueryFont(dpy, "fixed");
158 if (!font->xfont)
159 error("error, cannot load 'fixed' font\n");
160 font->ascent = font->xfont->ascent;
161 font->descent = font->xfont->descent;
162 }
163 font->height = font->ascent + font->descent;
164 }
165
166 unsigned int
167 labelheight(Fnt *font)
168 {
169 return font->height + 4;
170 }