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 // QUESTION: Why do we need Pixmaps for drawing? Can't we draw directly in the Window???
  33 // Parent could pass a cairo_surface_t to the children, and children use it, for drawing...
  34
  35
  36 // 1) resize child
  37 // 2) resize parent
  38 // 3) redraw parent
  39 // 4) redraw child
  40 void refresh (Area *a)
  41 {
  42         // don't draw and resize hide objects
  43         if (!a->on_screen) return;
  44
  45         size(a);
  46
  47         // don't draw transparent objects (without foreground and without background)
  48         if (a->redraw) {
  49                 a->redraw = 0;
  50                 // force redraw of child
  51                 GSList *l;
  52                 for (l = a->list ; l ; l = l->next)
  53                         set_redraw(l->data);
  54
  55                 //printf("draw area posx %d, width %d\n", a->posx, a->width);
  56                 draw(a, 0);
  57                 if (a->use_active)
  58                         draw(a, 1);
  59         }
  60
  61         // draw current Area
  62         Pixmap pmap = (a->is_active == 0) ? (a->pix.pmap) : (a->pix_active.pmap);
  63         if (pmap == 0) printf("empty area posx %d, width %d\n", a->posx, a->width);
  64         XCopyArea (server.dsp, pmap, ((Panel *)a->panel)->temp_pmap, server.gc, 0, 0, a->width, a->height, a->posx, a->posy);
  65
  66         // and then refresh child object
  67         GSList *l;
  68         for (l = a->list; l ; l = l->next)
  69                 refresh(l->data);
  70 }
  71
  72
  73 void size (Area *a)
  74 {
  75         GSList *l;
  76
  77         if (a->resize) {
  78                 a->resize = 0;
  79                 // force the resize of childs
  80                 for (l = a->list; l ; l = l->next) {
  81                         Area *area = (Area*)l->data;
  82                         area->resize = 1;
  83                         size(area);
  84                 }
  85
  86                 // resize can generate a redraw
  87                 if (a->_resize)
  88                         a->_resize(a);
  89         }
  90 }
  91
  92
  93 void set_redraw (Area *a)
  94 {
  95         a->redraw = 1;
  96
  97         GSList *l;
  98         for (l = a->list ; l ; l = l->next)
  99                 set_redraw(l->data);
 100 }
 101
 102
 103 void draw (Area *a, int active)
 104 {
 105         Pixmap *pmap = (active == 0) ? (&a->pix.pmap) : (&a->pix_active.pmap);
 106
 107         if (*pmap) XFreePixmap (server.dsp, *pmap);
 108         *pmap = XCreatePixmap (server.dsp, server.root_win, a->width, a->height, server.depth);
 109
 110         // add layer of root pixmap (or clear pixmap if real_transparency==true)
 111         if (real_transparency)
 112                 clear_pixmap(*pmap, 0 ,0, a->width, a->height);
 113         else
 114                 XCopyArea (server.dsp, ((Panel *)a->panel)->temp_pmap, *pmap, server.gc, a->posx, a->posy, a->width, a->height, 0, 0);
 115
 116         cairo_surface_t *cs;
 117         cairo_t *c;
 118
 119         cs = cairo_xlib_surface_create (server.dsp, *pmap, server.visual, a->width, a->height);
 120         c = cairo_create (cs);
 121
 122         draw_background (a, c, active);
 123
 124         if (a->_draw_foreground)
 125                 a->_draw_foreground(a, c, active);
 126
 127         cairo_destroy (c);
 128         cairo_surface_destroy (cs);
 129 }
 130
 131
 132 void draw_background (Area *a, cairo_t *c, int active)
 133 {
 134         Pmap *pix = (active == 0) ? (&a->pix) : (&a->pix_active);
 135
 136         if (pix->back.alpha > 0.0) {
 137                 //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);
 138                 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);
 139                 cairo_set_source_rgba(c, pix->back.color[0], pix->back.color[1], pix->back.color[2], pix->back.alpha);
 140
 141                 cairo_fill(c);
 142         }
 143
 144         if (pix->border.width > 0 && pix->border.alpha > 0.0) {
 145                 cairo_set_line_width (c, pix->border.width);
 146
 147                 // draw border inside (x, y, width, height)
 148                 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);
 149                 /*
 150                 // convert : radian = degre * M_PI/180
 151                 // définir le dégradé dans un carré de (0,0) (100,100)
 152                 // ensuite ce dégradé est extrapolé selon le ratio width/height
 153                 // dans repère (0, 0) (100, 100)
 154                 double X0, Y0, X1, Y1, degre;
 155                 // x = X * (a->width / 100), y = Y * (a->height / 100)
 156                 double x0, y0, x1, y1;
 157                 X0 = 0;
 158                 Y0 = 100;
 159                 X1 = 100;
 160                 Y1 = 0;
 161                 degre = 45;
 162                 // et ensuite faire la changement d'unité du repère
 163                 // car ce qui doit resté inchangée est les traits et pas la direction
 164
 165                 // il faut d'abord appliquer une rotation de 90° (et -180° si l'angle est supérieur à 180°)
 166                 // ceci peut être appliqué une fois pour toute au départ
 167                 // ensuite calculer l'angle dans le nouveau repère
 168                 // puis faire une rotation de 90°
 169                 x0 = X0 * ((double)a->width / 100);
 170                 x1 = X1 * ((double)a->width / 100);
 171                 y0 = Y0 * ((double)a->height / 100);
 172                 y1 = Y1 * ((double)a->height / 100);
 173
 174                 x0 = X0 * ((double)a->height / 100);
 175                 x1 = X1 * ((double)a->height / 100);
 176                 y0 = Y0 * ((double)a->width / 100);
 177                 y1 = Y1 * ((double)a->width / 100);
 178
 179                 cairo_pattern_t *linpat;
 180                 linpat = cairo_pattern_create_linear (x0, y0, x1, y1);
 181                 cairo_pattern_add_color_stop_rgba (linpat, 0, a->border.color[0], a->border.color[1], a->border.color[2], a->border.alpha);
 182                 cairo_pattern_add_color_stop_rgba (linpat, 1, a->border.color[0], a->border.color[1], a->border.color[2], 0);
 183                 cairo_set_source (c, linpat);
 184                 */
 185                 cairo_set_source_rgba (c, pix->border.color[0], pix->border.color[1], pix->border.color[2], pix->border.alpha);
 186
 187                 cairo_stroke (c);
 188                 //cairo_pattern_destroy (linpat);
 189         }
 190 }
 191
 192
 193 void remove_area (Area *a)
 194 {
 195         Area *parent = (Area*)a->parent;
 196
 197         parent->list = g_slist_remove(parent->list, a);
 198         set_redraw (parent);
 199
 200 }
 201
 202
 203 void add_area (Area *a)
 204 {
 205         Area *parent = (Area*)a->parent;
 206
 207         parent->list = g_slist_remove(parent->list, a);
 208         set_redraw (parent);
 209
 210 }
 211
 212
 213 void free_area (Area *a)
 214 {
 215         GSList *l0;
 216         for (l0 = a->list; l0 ; l0 = l0->next)
 217                 free_area (l0->data);
 218
 219         if (a->list) {
 220                 g_slist_free(a->list);
 221                 a->list = 0;
 222         }
 223         if (a->pix.pmap) {
 224                 XFreePixmap (server.dsp, a->pix.pmap);
 225                 a->pix.pmap = 0;
 226         }
 227         if (a->pix_active.pmap) {
 228                 XFreePixmap (server.dsp, a->pix_active.pmap);
 229                 a->pix_active.pmap = 0;
 230         }
 231 }
 232
 233
 234 void draw_rect(cairo_t *c, double x, double y, double w, double h, double r)
 235 {
 236         if (r > 0.0) {
 237                 double c1 = 0.55228475 * r;
 238
 239                 cairo_move_to(c, x+r, y);
 240                 cairo_rel_line_to(c, w-2*r, 0);
 241                 cairo_rel_curve_to(c, c1, 0.0, r, c1, r, r);
 242                 cairo_rel_line_to(c, 0, h-2*r);
 243                 cairo_rel_curve_to(c, 0.0, c1, c1-r, r, -r, r);
 244                 cairo_rel_line_to (c, -w +2*r, 0);
 245                 cairo_rel_curve_to (c, -c1, 0, -r, -c1, -r, -r);
 246                 cairo_rel_line_to (c, 0, -h + 2 * r);
 247                 cairo_rel_curve_to (c, 0, -c1, r - c1, -r, r, -r);
 248         }
 249         else
 250                 cairo_rectangle(c, x, y, w, h);
 251 }
 252
 253
 254 void clear_pixmap(Pixmap p, int x, int y, int w, int h)
 255 {
 256         cairo_surface_t *tmp = cairo_xlib_surface_create (server.dsp, p, server.visual, w, h);
 257         cairo_t *cr = cairo_create(tmp);
 258         cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
 259         cairo_rectangle(cr, x, y, w, h);
 260         cairo_set_source_rgba(cr, 1, 1, 1, 0);
 261         cairo_fill(cr);
 262         cairo_destroy(cr);
 263         cairo_surface_destroy (tmp);
 264 }