Dogcows Code - chaz/tint2/blob - src/util/area.c

   1 /**************************************************************************
   2 *
   3 * Tint2 : area
   4 *
   5 * Copyright (C) 2008 thierry lorthiois (lorthiois@bbsoft.fr)
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License version 2
   9 * as published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18 **************************************************************************/
  19
  20 #include <X11/Xlib.h>
  21 #include <X11/Xutil.h>
  22 #include <X11/Xatom.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <pango/pangocairo.h>
  27
  28 #include "area.h"
  29 #include "server.h"
  30 #include "panel.h"
  31
  32 // 1) resize child
  33 // 2) resize parent
  34 // 3) redraw parent
  35 // 4) redraw child
  36 void refresh (Area *a)
  37 {
  38         // don't draw and resize hide objects
  39         if (!a->on_screen) return;
  40
  41         size(a);
  42
  43         // don't draw transparent objects (without foreground and without background)
  44
  45    if (a->redraw) {
  46            a->redraw = 0;
  47            //printf("draw area posx %d, width %d\n", a->posx, a->width);
  48       draw(a, 0);
  49       if (a->use_active)
  50               draw(a, 1);
  51         }
  52
  53         // draw current Area
  54    Pixmap *pmap = (a->is_active == 0) ? (&a->pix.pmap) : (&a->pix_active.pmap);
  55         if (*pmap == 0) printf("empty area posx %d, width %d\n", a->posx, a->width);
  56    XCopyArea (server.dsp, *pmap, ((Panel *)a->panel)->temp_pmap, server.gc, 0, 0, a->width, a->height, a->posx, a->posy);
  57
  58    // and then refresh child object
  59         GSList *l;
  60    for (l = a->list; l ; l = l->next)
  61       refresh(l->data);
  62 }
  63
  64
  65 void size (Area *a)
  66 {
  67         GSList *l;
  68
  69         if (a->resize) {
  70       a->resize = 0;
  71                 for (l = a->list; l ; l = l->next)
  72                         size(l->data);
  73
  74         // resize can generate a redraw
  75            if (a->_resize) {
  76         a->_resize(a);
  77                 }
  78         }
  79 }
  80
  81
  82 void set_redraw (Area *a)
  83 {
  84    a->redraw = 1;
  85
  86    GSList *l;
  87    for (l = a->list ; l ; l = l->next)
  88       set_redraw(l->data);
  89 }
  90
  91
  92 void draw (Area *a, int active)
  93 {
  94    Pixmap *pmap = (active == 0) ? (&a->pix.pmap) : (&a->pix_active.pmap);
  95
  96    if (*pmap) XFreePixmap (server.dsp, *pmap);
  97    *pmap = XCreatePixmap (server.dsp, server.root_win, a->width, a->height, server.depth);
  98
  99    // add layer of root pixmap
 100    XCopyArea (server.dsp, ((Panel *)a->panel)->temp_pmap, *pmap, server.gc, a->posx, a->posy, a->width, a->height, 0, 0);
 101
 102    cairo_surface_t *cs;
 103    cairo_t *c;
 104
 105    cs = cairo_xlib_surface_create (server.dsp, *pmap, server.visual, a->width, a->height);
 106    c = cairo_create (cs);
 107
 108    draw_background (a, c, active);
 109
 110    if (a->_draw_foreground)
 111       a->_draw_foreground(a, c, active);
 112
 113    cairo_destroy (c);
 114    cairo_surface_destroy (cs);
 115 }
 116
 117
 118 void draw_background (Area *a, cairo_t *c, int active)
 119 {
 120    Pmap *pix = (active == 0) ? (&a->pix) : (&a->pix_active);
 121
 122    if (pix->back.alpha > 0.0) {
 123       //printf("    draw_background (%d %d) RGBA (%lf, %lf, %lf, %lf)\n", a->posx, a->posy, pix->back.color[0], pix->back.color[1], pix->back.color[2], pix->back.alpha);
 124       draw_rect(c, pix->border.width, pix->border.width, a->width-(2.0 * pix->border.width), a->height-(2.0*pix->border.width), pix->border.rounded - pix->border.width/1.571);
 125       cairo_set_source_rgba(c, pix->back.color[0], pix->back.color[1], pix->back.color[2], pix->back.alpha);
 126
 127       cairo_fill(c);
 128    }
 129
 130    if (pix->border.width > 0 && pix->border.alpha > 0.0) {
 131       cairo_set_line_width (c, pix->border.width);
 132
 133       // draw border inside (x, y, width, height)
 134       draw_rect(c, pix->border.width/2.0, pix->border.width/2.0, a->width - pix->border.width, a->height - pix->border.width, pix->border.rounded);
 135       /*
 136       // convert : radian = degre * M_PI/180
 137       // définir le dégradé dans un carré de (0,0) (100,100)
 138       // ensuite ce dégradé est extrapolé selon le ratio width/height
 139       // dans repère (0, 0) (100, 100)
 140       double X0, Y0, X1, Y1, degre;
 141       // x = X * (a->width / 100), y = Y * (a->height / 100)
 142       double x0, y0, x1, y1;
 143       X0 = 0;
 144       Y0 = 100;
 145       X1 = 100;
 146       Y1 = 0;
 147       degre = 45;
 148       // et ensuite faire la changement d'unité du repère
 149       // car ce qui doit resté inchangée est les traits et pas la direction
 150
 151       // il faut d'abord appliquer une rotation de 90° (et -180° si l'angle est supérieur à 180°)
 152       // ceci peut être appliqué une fois pour toute au départ
 153       // ensuite calculer l'angle dans le nouveau repère
 154       // puis faire une rotation de 90°
 155       x0 = X0 * ((double)a->width / 100);
 156       x1 = X1 * ((double)a->width / 100);
 157       y0 = Y0 * ((double)a->height / 100);
 158       y1 = Y1 * ((double)a->height / 100);
 159
 160       x0 = X0 * ((double)a->height / 100);
 161       x1 = X1 * ((double)a->height / 100);
 162       y0 = Y0 * ((double)a->width / 100);
 163       y1 = Y1 * ((double)a->width / 100);
 164
 165       cairo_pattern_t *linpat;
 166       linpat = cairo_pattern_create_linear (x0, y0, x1, y1);
 167       cairo_pattern_add_color_stop_rgba (linpat, 0, a->border.color[0], a->border.color[1], a->border.color[2], a->border.alpha);
 168       cairo_pattern_add_color_stop_rgba (linpat, 1, a->border.color[0], a->border.color[1], a->border.color[2], 0);
 169       cairo_set_source (c, linpat);
 170       */
 171       cairo_set_source_rgba (c, pix->border.color[0], pix->border.color[1], pix->border.color[2], pix->border.alpha);
 172
 173       cairo_stroke (c);
 174       //cairo_pattern_destroy (linpat);
 175    }
 176 }
 177
 178
 179 void remove_area (Area *a)
 180 {
 181    Area *parent = (Area*)a->parent;
 182
 183    parent->list = g_slist_remove(parent->list, a);
 184    set_redraw (parent);
 185
 186 }
 187
 188
 189 void add_area (Area *a)
 190 {
 191    Area *parent = (Area*)a->parent;
 192
 193    parent->list = g_slist_remove(parent->list, a);
 194    set_redraw (parent);
 195
 196 }
 197
 198
 199 void free_area (Area *a)
 200 {
 201    GSList *l0;
 202    for (l0 = a->list; l0 ; l0 = l0->next)
 203       free_area (l0->data);
 204
 205    if (a->list) {
 206       g_slist_free(a->list);
 207       a->list = 0;
 208    }
 209    if (a->pix.pmap) {
 210         XFreePixmap (server.dsp, a->pix.pmap);
 211         a->pix.pmap = 0;
 212         }
 213    if (a->pix_active.pmap) {
 214         XFreePixmap (server.dsp, a->pix_active.pmap);
 215         a->pix_active.pmap = 0;
 216         }
 217 }
 218
 219
 220 void draw_rect(cairo_t *c, double x, double y, double w, double h, double r)
 221 {
 222    if (r > 0.0) {
 223       double c1 = 0.55228475 * r;
 224
 225       cairo_move_to(c, x+r, y);
 226       cairo_rel_line_to(c, w-2*r, 0);
 227       cairo_rel_curve_to(c, c1, 0.0, r, c1, r, r);
 228       cairo_rel_line_to(c, 0, h-2*r);
 229       cairo_rel_curve_to(c, 0.0, c1, c1-r, r, -r, r);
 230       cairo_rel_line_to (c, -w +2*r, 0);
 231       cairo_rel_curve_to (c, -c1, 0, -r, -c1, -r, -r);
 232       cairo_rel_line_to (c, 0, -h + 2 * r);
 233       cairo_rel_curve_to (c, 0, -c1, r - c1, -r, r, -r);
 234    }
 235    else
 236       cairo_rectangle(c, x, y, w, h);
 237 }
 238
 239