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 <X11/extensions/Xrender.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <pango/pangocairo.h>
  28
  29 #include "area.h"
  30 #include "server.h"
  31 #include "panel.h"
  32
  33
  34 /************************************************************
  35  * Layering & drawing loop of tint2
  36  *
  37  * Areas in tint2 are similar to widgets in a GUI.
  38  * Areas (task, clock, systray, taskbar,...) are nodes in a tree.
  39  * The position of each Area is defined by parent's position and brothers on the left.
  40  *
  41  * !!! This design is experimental and not yet complete !!!!!!!!!!!!!
  42  *
  43  * 1) browse tree and resize SIZE_BY_CONTENT node
  44  *      - children node are resized before its parent
  45  *      - if 'size' changed then 'resize = 1' on the parent
  46  * 2) browse tree and resize SIZE_BY_LAYOUT node
  47  *      - parent node is resized before its children
  48  *      - if 'size' changed then 'resize = 1' on childs with SIZE_BY_LAYOUT
  49  * 3) calculate posx of all objects
  50  *      - parent's position is calculated before children's position
  51  * 4) redraw needed objects
  52  ************************************************************/
  53
  54 void size_by_content (Area *a);
  55 void size_by_layout (Area *a);
  56
  57
  58 void refresh (Area *a)
  59 {
  60         // don't draw and resize hide objects
  61         if (!a->on_screen) return;
  62
  63         //size(a);
  64         size_by_content(a);
  65         size_by_layout(a);
  66
  67         // don't draw transparent objects (without foreground and without background)
  68         if (a->redraw) {
  69                 a->redraw = 0;
  70                 // force redraw of child
  71                 GSList *l;
  72                 for (l = a->list ; l ; l = l->next)
  73                         set_redraw(l->data);
  74
  75                 //printf("draw area posx %d, width %d\n", a->posx, a->width);
  76                 draw(a);
  77         }
  78
  79         // draw current Area
  80         if (a->pix == 0) printf("empty area posx %d, width %d\n", a->posx, a->width);
  81         XCopyArea (server.dsp, a->pix, ((Panel *)a->panel)->temp_pmap, server.gc, 0, 0, a->width, a->height, a->posx, a->posy);
  82
  83         // and then refresh child object
  84         GSList *l;
  85         for (l = a->list; l ; l = l->next)
  86                 refresh(l->data);
  87 }
  88
  89
  90 void size (Area *a)
  91 {
  92         GSList *l;
  93
  94         if (a->resize) {
  95                 a->resize = 0;
  96                 // force the resize of childs
  97                 for (l = a->list; l ; l = l->next) {
  98                         Area *area = (Area*)l->data;
  99                         area->resize = 1;
 100                         size(area);
 101                 }
 102
 103                 // resize can generate a redraw
 104                 if (a->_resize)
 105                         a->_resize(a);
 106         }
 107 }
 108
 109
 110 void size_by_content (Area *a)
 111 {
 112         // children node are resized before its parent
 113         GSList *l;
 114         for (l = a->list; l ; l = l->next)
 115                 size_by_content(l->data);
 116
 117         // calculate current area's size
 118         if (a->resize && a->size_mode == SIZE_BY_CONTENT) {
 119                 a->resize = 0;
 120
 121                 // if 'size' changed then 'resize = 1' on the parent
 122                 if (a->_resize) {
 123                         a->_resize(a);
 124                         ((Area*)a->parent)->resize = 1;
 125                 }
 126         }
 127 }
 128
 129
 130 void size_by_layout (Area *a)
 131 {
 132         // parent node is resized before its children
 133         // calculate current area's size
 134         GSList *l;
 135         if (a->resize && a->size_mode == SIZE_BY_LAYOUT) {
 136                 a->resize = 0;
 137
 138                 // if 'size' changed then 'resize = 1' on childs with SIZE_BY_LAYOUT
 139                 if (a->_resize) {
 140                         a->_resize(a);
 141                         for (l = a->list; l ; l = l->next) {
 142                                 if (((Area*)l->data)->size_mode == SIZE_BY_LAYOUT)
 143                                         ((Area*)l->data)->resize = 1;
 144                         }
 145                 }
 146         }
 147
 148         for (l = a->list; l ; l = l->next)
 149                 size_by_layout(l->data);
 150 }
 151
 152
 153 void set_redraw (Area *a)
 154 {
 155         a->redraw = 1;
 156
 157         GSList *l;
 158         for (l = a->list ; l ; l = l->next)
 159                 set_redraw(l->data);
 160 }
 161
 162
 163 void draw (Area *a)
 164 {
 165         if (a->pix) XFreePixmap (server.dsp, a->pix);
 166         a->pix = XCreatePixmap (server.dsp, server.root_win, a->width, a->height, server.depth);
 167
 168         // add layer of root pixmap (or clear pixmap if real_transparency==true)
 169         if (server.real_transparency)
 170                 clear_pixmap(a->pix, 0 ,0, a->width, a->height);
 171         XCopyArea (server.dsp, ((Panel *)a->panel)->temp_pmap, a->pix, server.gc, a->posx, a->posy, a->width, a->height, 0, 0);
 172
 173         cairo_surface_t *cs;
 174         cairo_t *c;
 175
 176         cs = cairo_xlib_surface_create (server.dsp, a->pix, server.visual, a->width, a->height);
 177         c = cairo_create (cs);
 178
 179         draw_background (a, c);
 180
 181         if (a->_draw_foreground)
 182                 a->_draw_foreground(a, c);
 183
 184         cairo_destroy (c);
 185         cairo_surface_destroy (cs);
 186 }
 187
 188
 189 void draw_background (Area *a, cairo_t *c)
 190 {
 191         if (a->bg->back.alpha > 0.0) {
 192                 //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);
 193                 draw_rect(c, a->bg->border.width, a->bg->border.width, a->width-(2.0 * a->bg->border.width), a->height-(2.0*a->bg->border.width), a->bg->border.rounded - a->bg->border.width/1.571);
 194                 cairo_set_source_rgba(c, a->bg->back.color[0], a->bg->back.color[1], a->bg->back.color[2], a->bg->back.alpha);
 195                 cairo_fill(c);
 196         }
 197
 198         if (a->bg->border.width > 0 && a->bg->border.alpha > 0.0) {
 199                 cairo_set_line_width (c, a->bg->border.width);
 200
 201                 // draw border inside (x, y, width, height)
 202                 draw_rect(c, a->bg->border.width/2.0, a->bg->border.width/2.0, a->width - a->bg->border.width, a->height - a->bg->border.width, a->bg->border.rounded);
 203                 /*
 204                 // convert : radian = degre * M_PI/180
 205                 // definir le degrade dans un carre de (0,0) (100,100)
 206                 // ensuite ce degrade est extrapoler selon le ratio width/height
 207                 // dans repere (0, 0) (100, 100)
 208                 double X0, Y0, X1, Y1, degre;
 209                 // x = X * (a->width / 100), y = Y * (a->height / 100)
 210                 double x0, y0, x1, y1;
 211                 X0 = 0;
 212                 Y0 = 100;
 213                 X1 = 100;
 214                 Y1 = 0;
 215                 degre = 45;
 216                 // et ensuite faire la changement d'unite du repere
 217                 // car ce qui doit reste inchangee est les traits et pas la direction
 218
 219                 // il faut d'abord appliquer une rotation de 90 (et -180 si l'angle est superieur a  180)
 220                 // ceci peut etre applique une fois pour toute au depart
 221                 // ensuite calculer l'angle dans le nouveau repare
 222                 // puis faire une rotation de 90
 223                 x0 = X0 * ((double)a->width / 100);
 224                 x1 = X1 * ((double)a->width / 100);
 225                 y0 = Y0 * ((double)a->height / 100);
 226                 y1 = Y1 * ((double)a->height / 100);
 227
 228                 x0 = X0 * ((double)a->height / 100);
 229                 x1 = X1 * ((double)a->height / 100);
 230                 y0 = Y0 * ((double)a->width / 100);
 231                 y1 = Y1 * ((double)a->width / 100);
 232
 233                 cairo_pattern_t *linpat;
 234                 linpat = cairo_pattern_create_linear (x0, y0, x1, y1);
 235                 cairo_pattern_add_color_stop_rgba (linpat, 0, a->border.color[0], a->border.color[1], a->border.color[2], a->border.alpha);
 236                 cairo_pattern_add_color_stop_rgba (linpat, 1, a->border.color[0], a->border.color[1], a->border.color[2], 0);
 237                 cairo_set_source (c, linpat);
 238                 */
 239                 cairo_set_source_rgba (c, a->bg->border.color[0], a->bg->border.color[1], a->bg->border.color[2], a->bg->border.alpha);
 240
 241                 cairo_stroke (c);
 242                 //cairo_pattern_destroy (linpat);
 243         }
 244 }
 245
 246
 247 void remove_area (Area *a)
 248 {
 249         Area *parent = (Area*)a->parent;
 250
 251         parent->list = g_slist_remove(parent->list, a);
 252         set_redraw (parent);
 253
 254 }
 255
 256
 257 void add_area (Area *a)
 258 {
 259         Area *parent = (Area*)a->parent;
 260
 261         parent->list = g_slist_remove(parent->list, a);
 262         set_redraw (parent);
 263
 264 }
 265
 266
 267 void free_area (Area *a)
 268 {
 269         GSList *l0;
 270         for (l0 = a->list; l0 ; l0 = l0->next)
 271                 free_area (l0->data);
 272
 273         if (a->list) {
 274                 g_slist_free(a->list);
 275                 a->list = 0;
 276         }
 277         if (a->pix) {
 278                 XFreePixmap (server.dsp, a->pix);
 279                 a->pix = 0;
 280         }
 281 }
 282
 283
 284 void draw_rect(cairo_t *c, double x, double y, double w, double h, double r)
 285 {
 286         if (r > 0.0) {
 287                 double c1 = 0.55228475 * r;
 288
 289                 cairo_move_to(c, x+r, y);
 290                 cairo_rel_line_to(c, w-2*r, 0);
 291                 cairo_rel_curve_to(c, c1, 0.0, r, c1, r, r);
 292                 cairo_rel_line_to(c, 0, h-2*r);
 293                 cairo_rel_curve_to(c, 0.0, c1, c1-r, r, -r, r);
 294                 cairo_rel_line_to (c, -w +2*r, 0);
 295                 cairo_rel_curve_to (c, -c1, 0, -r, -c1, -r, -r);
 296                 cairo_rel_line_to (c, 0, -h + 2 * r);
 297                 cairo_rel_curve_to (c, 0, -c1, r - c1, -r, r, -r);
 298         }
 299         else
 300                 cairo_rectangle(c, x, y, w, h);
 301 }
 302
 303
 304 void clear_pixmap(Pixmap p, int x, int y, int w, int h)
 305 {
 306         Picture pict = XRenderCreatePicture(server.dsp, p, XRenderFindVisualFormat(server.dsp, server.visual), 0, 0);
 307         XRenderColor col = { .red=0, .green=0, .blue=0, .alpha=0 };
 308         XRenderFillRectangle(server.dsp, PictOpSrc, pict, &col, x, y, w, h);
 309         XRenderFreePicture(server.dsp, pict);
 310 }