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