Dogcows Code - chaz/tint2/blob - src/tooltip/tooltip.c

   1 /**************************************************************************
   2 *
   3 * Copyright (C) 2009 Andreas.Fink (Andreas.Fink85@gmail.com)
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License version 2
   7 * as published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 * You should have received a copy of the GNU General Public License
  14 * along with this program; if not, write to the Free Software
  15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  16 **************************************************************************/
  17
  18 #include <stdio.h>
  19 #include <unistd.h>
  20 #include <string.h>
  21 #include <stdlib.h>
  22 #include <cairo.h>
  23 #include <cairo-xlib.h>
  24
  25 #include "server.h"
  26 #include "tooltip.h"
  27 #include "panel.h"
  28 #include "timer.h"
  29
  30 static int x, y, width, height;
  31
  32 // the next functions are helper functions for tooltip handling
  33 void start_show_timeout();
  34 void start_hide_timeout();
  35 void stop_tooltip_timeout();
  36
  37 Tooltip g_tooltip;
  38
  39
  40 void default_tooltip()
  41 {
  42         // give the tooltip some reasonable default values
  43         memset(&g_tooltip, 0, sizeof(Tooltip));
  44
  45         g_tooltip.font_color.color[0] = 1;
  46         g_tooltip.font_color.color[1] = 1;
  47         g_tooltip.font_color.color[2] = 1;
  48         g_tooltip.font_color.alpha = 1;
  49 }
  50
  51 void cleanup_tooltip()
  52 {
  53         stop_tooltip_timeout();
  54         tooltip_hide(0);
  55         tooltip_copy_text(0);
  56         if (g_tooltip.window) XDestroyWindow(server.dsp, g_tooltip.window);
  57         if (g_tooltip.font_desc) pango_font_description_free(g_tooltip.font_desc);
  58 }
  59
  60
  61 void init_tooltip()
  62 {
  63         if (!g_tooltip.font_desc)
  64                 g_tooltip.font_desc = pango_font_description_from_string("sans 10");
  65
  66         XSetWindowAttributes attr;
  67         attr.override_redirect = True;
  68         attr.event_mask = StructureNotifyMask;
  69         attr.colormap = server.colormap;
  70         attr.background_pixel = 0;
  71         attr.border_pixel = 0;
  72         unsigned long mask = CWEventMask|CWColormap|CWBorderPixel|CWBackPixel|CWOverrideRedirect;
  73         if (g_tooltip.window) XDestroyWindow(server.dsp, g_tooltip.window);
  74         g_tooltip.window = XCreateWindow(server.dsp, server.root_win, 0, 0, 100, 20, 0, server.depth, InputOutput, server.visual, mask, &attr);
  75 }
  76
  77
  78 void tooltip_trigger_show(Area* area, Panel* p, XEvent *e)
  79 {
  80         // Position the tooltip in the center of the area
  81         x = area->posx + area->width / 2 + e->xmotion.x_root - e->xmotion.x;
  82         y = area->posy + area->height / 2 + e->xmotion.y_root - e->xmotion.y;
  83         if (!panel_horizontal)
  84                 y -= height/2;
  85         g_tooltip.panel = p;
  86         if (g_tooltip.mapped && g_tooltip.area != area) {
  87                 tooltip_copy_text(area);
  88                 tooltip_update();
  89                 stop_tooltip_timeout();
  90         }
  91         else if (!g_tooltip.mapped) {
  92                 start_show_timeout();
  93         }
  94 }
  95
  96
  97 void tooltip_show(void* arg)
  98 {
  99         int mx, my;
 100         Window w;
 101         XTranslateCoordinates( server.dsp, server.root_win, g_tooltip.panel->main_win, x, y, &mx, &my, &w);
 102         Area* area = click_area(g_tooltip.panel, mx, my);
 103         stop_tooltip_timeout();
 104         if (!g_tooltip.mapped && area->_get_tooltip_text) {
 105                 tooltip_copy_text(area);
 106                 g_tooltip.mapped = True;
 107                 XMapWindow(server.dsp, g_tooltip.window);
 108                 tooltip_update();
 109                 XFlush(server.dsp);
 110         }
 111 }
 112
 113
 114 void tooltip_update_geometry()
 115 {
 116         cairo_surface_t *cs;
 117         cairo_t *c;
 118         PangoLayout* layout;
 119         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 120         c = cairo_create(cs);
 121         layout = pango_cairo_create_layout(c);
 122         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 123         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 124         PangoRectangle r1, r2;
 125         pango_layout_get_pixel_extents(layout, &r1, &r2);
 126         width = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingx + r2.width;
 127         height = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingy + r2.height;
 128
 129         Panel* panel = g_tooltip.panel;
 130         if (panel_horizontal && panel_position & BOTTOM)
 131                 y = panel->posy-height;
 132         else if (panel_horizontal && panel_position & TOP)
 133                 y = panel->posy + panel->area.height;
 134         else if (panel_position & LEFT)
 135                 x = panel->posx + panel->area.width;
 136         else
 137                 x = panel->posx - width;
 138
 139         g_object_unref(layout);
 140         cairo_destroy(c);
 141         cairo_surface_destroy(cs);
 142 }
 143
 144
 145 void tooltip_adjust_geometry()
 146 {
 147         // adjust coordinates and size to not go offscreen
 148         // it seems quite impossible that the height needs to be adjusted, but we do it anyway.
 149
 150         int min_x, min_y, max_width, max_height;
 151         Panel* panel = g_tooltip.panel;
 152         int screen_width = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width;
 153         int screen_height = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height;
 154         if ( x+width <= screen_width && y+height <= screen_height && x>=server.monitor[panel->monitor].x && y>=server.monitor[panel->monitor].y )
 155                 return;    // no adjustment needed
 156
 157         if (panel_horizontal) {
 158                 min_x=0;
 159                 max_width=server.monitor[panel->monitor].width;
 160                 max_height=server.monitor[panel->monitor].height-panel->area.height;
 161                 if (panel_position & BOTTOM)
 162                         min_y=0;
 163                 else
 164                         min_y=panel->area.height;
 165         }
 166         else {
 167                 max_width=server.monitor[panel->monitor].width-panel->area.width;
 168                 min_y=0;
 169                 max_height=server.monitor[panel->monitor].height;
 170                 if (panel_position & LEFT)
 171                         min_x=panel->area.width;
 172                 else
 173                         min_x=0;
 174         }
 175
 176         if (x+width > server.monitor[panel->monitor].x + server.monitor[panel->monitor].width)
 177                 x = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width - width;
 178         if ( y+height > server.monitor[panel->monitor].y + server.monitor[panel->monitor].height)
 179                 y = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height - height;
 180
 181         if (x<min_x)
 182                 x=min_x;
 183         if (width>max_width)
 184                 width = max_width;
 185         if (y<min_y)
 186                 y=min_y;
 187         if (height>max_height)
 188                 height=max_height;
 189 }
 190
 191 void tooltip_update()
 192 {
 193         if (!g_tooltip.tooltip_text) {
 194                 tooltip_hide(0);
 195                 return;
 196         }
 197
 198         tooltip_update_geometry();
 199         tooltip_adjust_geometry();
 200         XMoveResizeWindow(server.dsp, g_tooltip.window, x, y, width, height);
 201
 202         // Stuff for drawing the tooltip
 203         cairo_surface_t *cs;
 204         cairo_t *c;
 205         PangoLayout* layout;
 206         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 207         c = cairo_create(cs);
 208         Color bc = g_tooltip.bg->back;
 209         Border b = g_tooltip.bg->border;
 210         if (server.real_transparency) {
 211                 clear_pixmap(g_tooltip.window, 0, 0, width, height);
 212                 draw_rect(c, b.width, b.width, width-2*b.width, height-2*b.width, b.rounded-b.width/1.571);
 213                 cairo_set_source_rgba(c, bc.color[0], bc.color[1], bc.color[2], bc.alpha);
 214         }
 215         else {
 216                 cairo_rectangle(c, 0., 0, width, height);
 217                 cairo_set_source_rgb(c, bc.color[0], bc.color[1], bc.color[2]);
 218         }
 219         cairo_fill(c);
 220         cairo_set_line_width(c, b.width);
 221         if (server.real_transparency)
 222                 draw_rect(c, b.width/2.0, b.width/2.0, width - b.width, height - b.width, b.rounded);
 223         else
 224                 cairo_rectangle(c, b.width/2.0, b.width/2.0, width-b.width, height-b.width);
 225         cairo_set_source_rgba(c, b.color[0], b.color[1], b.color[2], b.alpha);
 226         cairo_stroke(c);
 227
 228         Color fc = g_tooltip.font_color;
 229         cairo_set_source_rgba(c, fc.color[0], fc.color[1], fc.color[2], fc.alpha);
 230         layout = pango_cairo_create_layout(c);
 231         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 232         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 233         PangoRectangle r1, r2;
 234         pango_layout_get_pixel_extents(layout, &r1, &r2);
 235         pango_layout_set_width(layout, width*PANGO_SCALE);
 236         pango_layout_set_height(layout, height*PANGO_SCALE);
 237         pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
 238         // I do not know why this is the right way, but with the below cairo_move_to it seems to be centered (horiz. and vert.)
 239         cairo_move_to(c, -r1.x/2+g_tooltip.bg->border.width+g_tooltip.paddingx, -r1.y/2+g_tooltip.bg->border.width+g_tooltip.paddingy);
 240         pango_cairo_show_layout (c, layout);
 241
 242         g_object_unref (layout);
 243         cairo_destroy (c);
 244         cairo_surface_destroy (cs);
 245 }
 246
 247
 248 void tooltip_trigger_hide(Tooltip* tooltip)
 249 {
 250         if (g_tooltip.mapped) {
 251                 tooltip_copy_text(0);
 252                 start_hide_timeout();
 253         }
 254         else {
 255                 // tooltip not visible yet, but maybe a timeout is still pending
 256                 stop_tooltip_timeout();
 257         }
 258 }
 259
 260
 261 void tooltip_hide(void* arg)
 262 {
 263         stop_tooltip_timeout();
 264         if (g_tooltip.mapped) {
 265                 g_tooltip.mapped = False;
 266                 XUnmapWindow(server.dsp, g_tooltip.window);
 267                 XFlush(server.dsp);
 268         }
 269 }
 270
 271
 272 void start_show_timeout()
 273 {
 274         if (g_tooltip.timeout)
 275                 change_timeout(g_tooltip.timeout, g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 276         else
 277                 g_tooltip.timeout = add_timeout(g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 278 }
 279
 280
 281 void start_hide_timeout()
 282 {
 283         if (g_tooltip.timeout)
 284                 change_timeout(g_tooltip.timeout, g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 285         else
 286                 g_tooltip.timeout = add_timeout(g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 287 }
 288
 289
 290 void stop_tooltip_timeout()
 291 {
 292         if (g_tooltip.timeout) {
 293                 stop_timeout(g_tooltip.timeout);
 294                 g_tooltip.timeout = 0;
 295         }
 296 }
 297
 298
 299 void tooltip_copy_text(Area* area)
 300 {
 301         free(g_tooltip.tooltip_text);
 302         if (area && area->_get_tooltip_text)
 303                 g_tooltip.tooltip_text = strdup(area->_get_tooltip_text(area));
 304         else
 305                 g_tooltip.tooltip_text = 0;
 306         g_tooltip.area = area;
 307 }