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;
 103         if (!panel_horizontal)
 104                 my += height/2; /* we adjusted y in tooltip_trigger_show, revert or we won't find the correct area anymore */
 105         area = click_area(g_tooltip.panel, mx, my);
 106         stop_tooltip_timeout();
 107         if (!g_tooltip.mapped && area->_get_tooltip_text) {
 108                 tooltip_copy_text(area);
 109                 g_tooltip.mapped = True;
 110                 XMapWindow(server.dsp, g_tooltip.window);
 111                 tooltip_update();
 112                 XFlush(server.dsp);
 113         }
 114 }
 115
 116
 117 void tooltip_update_geometry()
 118 {
 119         cairo_surface_t *cs;
 120         cairo_t *c;
 121         PangoLayout* layout;
 122         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 123         c = cairo_create(cs);
 124         layout = pango_cairo_create_layout(c);
 125         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 126         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 127         PangoRectangle r1, r2;
 128         pango_layout_get_pixel_extents(layout, &r1, &r2);
 129         width = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingx + r2.width;
 130         height = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingy + r2.height;
 131
 132         Panel* panel = g_tooltip.panel;
 133         if (panel_horizontal && panel_position & BOTTOM)
 134                 y = panel->posy-height;
 135         else if (panel_horizontal && panel_position & TOP)
 136                 y = panel->posy + panel->area.height;
 137         else if (panel_position & LEFT)
 138                 x = panel->posx + panel->area.width;
 139         else
 140                 x = panel->posx - width;
 141
 142         g_object_unref(layout);
 143         cairo_destroy(c);
 144         cairo_surface_destroy(cs);
 145 }
 146
 147
 148 void tooltip_adjust_geometry()
 149 {
 150         // adjust coordinates and size to not go offscreen
 151         // it seems quite impossible that the height needs to be adjusted, but we do it anyway.
 152
 153         int min_x, min_y, max_width, max_height;
 154         Panel* panel = g_tooltip.panel;
 155         int screen_width = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width;
 156         int screen_height = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height;
 157         if ( x+width <= screen_width && y+height <= screen_height && x>=server.monitor[panel->monitor].x && y>=server.monitor[panel->monitor].y )
 158                 return;    // no adjustment needed
 159
 160         if (panel_horizontal) {
 161                 min_x=0;
 162                 max_width=server.monitor[panel->monitor].width;
 163                 max_height=server.monitor[panel->monitor].height-panel->area.height;
 164                 if (panel_position & BOTTOM)
 165                         min_y=0;
 166                 else
 167                         min_y=panel->area.height;
 168         }
 169         else {
 170                 max_width=server.monitor[panel->monitor].width-panel->area.width;
 171                 min_y=0;
 172                 max_height=server.monitor[panel->monitor].height;
 173                 if (panel_position & LEFT)
 174                         min_x=panel->area.width;
 175                 else
 176                         min_x=0;
 177         }
 178
 179         if (x+width > server.monitor[panel->monitor].x + server.monitor[panel->monitor].width)
 180                 x = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width - width;
 181         if ( y+height > server.monitor[panel->monitor].y + server.monitor[panel->monitor].height)
 182                 y = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height - height;
 183
 184         if (x<min_x)
 185                 x=min_x;
 186         if (width>max_width)
 187                 width = max_width;
 188         if (y<min_y)
 189                 y=min_y;
 190         if (height>max_height)
 191                 height=max_height;
 192 }
 193
 194 void tooltip_update()
 195 {
 196         if (!g_tooltip.tooltip_text) {
 197                 tooltip_hide(0);
 198                 return;
 199         }
 200
 201         tooltip_update_geometry();
 202         tooltip_adjust_geometry();
 203         XMoveResizeWindow(server.dsp, g_tooltip.window, x, y, width, height);
 204
 205         // Stuff for drawing the tooltip
 206         cairo_surface_t *cs;
 207         cairo_t *c;
 208         PangoLayout* layout;
 209         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 210         c = cairo_create(cs);
 211         Color bc = g_tooltip.bg->back;
 212         Border b = g_tooltip.bg->border;
 213         if (server.real_transparency) {
 214                 clear_pixmap(g_tooltip.window, 0, 0, width, height);
 215                 draw_rect(c, b.width, b.width, width-2*b.width, height-2*b.width, b.rounded-b.width/1.571);
 216                 cairo_set_source_rgba(c, bc.color[0], bc.color[1], bc.color[2], bc.alpha);
 217         }
 218         else {
 219                 cairo_rectangle(c, 0., 0, width, height);
 220                 cairo_set_source_rgb(c, bc.color[0], bc.color[1], bc.color[2]);
 221         }
 222         cairo_fill(c);
 223         cairo_set_line_width(c, b.width);
 224         if (server.real_transparency)
 225                 draw_rect(c, b.width/2.0, b.width/2.0, width - b.width, height - b.width, b.rounded);
 226         else
 227                 cairo_rectangle(c, b.width/2.0, b.width/2.0, width-b.width, height-b.width);
 228         cairo_set_source_rgba(c, b.color[0], b.color[1], b.color[2], b.alpha);
 229         cairo_stroke(c);
 230
 231         Color fc = g_tooltip.font_color;
 232         cairo_set_source_rgba(c, fc.color[0], fc.color[1], fc.color[2], fc.alpha);
 233         layout = pango_cairo_create_layout(c);
 234         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 235         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 236         PangoRectangle r1, r2;
 237         pango_layout_get_pixel_extents(layout, &r1, &r2);
 238         pango_layout_set_width(layout, width*PANGO_SCALE);
 239         pango_layout_set_height(layout, height*PANGO_SCALE);
 240         pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
 241         // 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.)
 242         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);
 243         pango_cairo_show_layout (c, layout);
 244
 245         g_object_unref (layout);
 246         cairo_destroy (c);
 247         cairo_surface_destroy (cs);
 248 }
 249
 250
 251 void tooltip_trigger_hide(Tooltip* tooltip)
 252 {
 253         if (g_tooltip.mapped) {
 254                 tooltip_copy_text(0);
 255                 start_hide_timeout();
 256         }
 257         else {
 258                 // tooltip not visible yet, but maybe a timeout is still pending
 259                 stop_tooltip_timeout();
 260         }
 261 }
 262
 263
 264 void tooltip_hide(void* arg)
 265 {
 266         stop_tooltip_timeout();
 267         if (g_tooltip.mapped) {
 268                 g_tooltip.mapped = False;
 269                 XUnmapWindow(server.dsp, g_tooltip.window);
 270                 XFlush(server.dsp);
 271         }
 272 }
 273
 274
 275 void start_show_timeout()
 276 {
 277         if (g_tooltip.timeout)
 278                 change_timeout(g_tooltip.timeout, g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 279         else
 280                 g_tooltip.timeout = add_timeout(g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 281 }
 282
 283
 284 void start_hide_timeout()
 285 {
 286         if (g_tooltip.timeout)
 287                 change_timeout(g_tooltip.timeout, g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 288         else
 289                 g_tooltip.timeout = add_timeout(g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 290 }
 291
 292
 293 void stop_tooltip_timeout()
 294 {
 295         if (g_tooltip.timeout) {
 296                 stop_timeout(g_tooltip.timeout);
 297                 g_tooltip.timeout = 0;
 298         }
 299 }
 300
 301
 302 void tooltip_copy_text(Area* area)
 303 {
 304         free(g_tooltip.tooltip_text);
 305         if (area && area->_get_tooltip_text)
 306                 g_tooltip.tooltip_text = strdup(area->_get_tooltip_text(area));
 307         else
 308                 g_tooltip.tooltip_text = 0;
 309         g_tooltip.area = area;
 310 }