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, int x_root, int y_root)
  79 {
  80         x = x_root;
  81         y = y_root;
  82         g_tooltip.panel = p;
  83         if (g_tooltip.mapped && g_tooltip.area != area) {
  84                 tooltip_copy_text(area);
  85                 tooltip_update();
  86                 stop_tooltip_timeout();
  87         }
  88         else if (!g_tooltip.mapped) {
  89                 start_show_timeout();
  90         }
  91 }
  92
  93
  94 void tooltip_show(void* arg)
  95 {
  96   int mx, my;
  97   Window w;
  98   XTranslateCoordinates( server.dsp, server.root_win, g_tooltip.panel->main_win, x, y, &mx, &my, &w);
  99   Area* area = click_area(g_tooltip.panel, mx, my);
 100         stop_tooltip_timeout();
 101         if (!g_tooltip.mapped && area->_get_tooltip_text) {
 102                 tooltip_copy_text(area);
 103                 g_tooltip.mapped = True;
 104                 XMapWindow(server.dsp, g_tooltip.window);
 105                 tooltip_update();
 106                 XFlush(server.dsp);
 107         }
 108 }
 109
 110
 111 void tooltip_update_geometry()
 112 {
 113         cairo_surface_t *cs;
 114         cairo_t *c;
 115         PangoLayout* layout;
 116         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 117         c = cairo_create(cs);
 118         layout = pango_cairo_create_layout(c);
 119         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 120         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 121         PangoRectangle r1, r2;
 122         pango_layout_get_pixel_extents(layout, &r1, &r2);
 123         width = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingx + r2.width;
 124         height = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingy + r2.height;
 125
 126         Panel* panel = g_tooltip.panel;
 127         if (panel_horizontal && panel_position & BOTTOM)
 128                 y = panel->posy-height;
 129         else if (panel_horizontal && panel_position & TOP)
 130                 y = panel->posy + panel->area.height;
 131         else if (panel_position & LEFT)
 132                 x = panel->posx + panel->area.width;
 133         else
 134                 x = panel->posx - width;
 135
 136         g_object_unref(layout);
 137         cairo_destroy(c);
 138         cairo_surface_destroy(cs);
 139 }
 140
 141
 142 void tooltip_adjust_geometry()
 143 {
 144         // adjust coordinates and size to not go offscreen
 145         // it seems quite impossible that the height needs to be adjusted, but we do it anyway.
 146
 147         int min_x, min_y, max_width, max_height;
 148         Panel* panel = g_tooltip.panel;
 149         int screen_width = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width;
 150         int screen_height = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height;
 151         if ( x+width <= screen_width && y+height <= screen_height && x>=0 && y>=0)
 152                 return;    // no adjustment needed
 153
 154         if (panel_horizontal) {
 155                 min_x=0;
 156                 max_width=screen_width;
 157                 max_height=screen_height-panel->area.height;
 158                 if (panel_position & BOTTOM)
 159                         min_y=0;
 160                 else
 161                         min_y=panel->area.height;
 162         }
 163         else {
 164                 max_width=screen_width-panel->area.width;
 165                 min_y=0;
 166                 max_height=screen_height;
 167                 if (panel_position & LEFT)
 168                         min_x=panel->area.width;
 169                 else
 170                         min_x=0;
 171         }
 172
 173         if (x+width > server.monitor[panel->monitor].x + server.monitor[panel->monitor].width)
 174                 x = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width - width;
 175         if ( y+height > server.monitor[panel->monitor].y + server.monitor[panel->monitor].height)
 176                 y = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height - height;
 177
 178         if (x<min_x)
 179                 x=min_x;
 180         if (width>max_width)
 181                 width = max_width;
 182         if (y<min_y)
 183                 y=min_y;
 184         if (height>max_height)
 185                 height=max_height;
 186 }
 187
 188 void tooltip_update()
 189 {
 190         if (!g_tooltip.tooltip_text) {
 191                 tooltip_hide(0);
 192                 return;
 193         }
 194
 195         tooltip_update_geometry();
 196         tooltip_adjust_geometry();
 197         XMoveResizeWindow(server.dsp, g_tooltip.window, x, y, width, height);
 198
 199         // Stuff for drawing the tooltip
 200         cairo_surface_t *cs;
 201         cairo_t *c;
 202         PangoLayout* layout;
 203         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 204         c = cairo_create(cs);
 205         Color bc = g_tooltip.bg->back;
 206         Border b = g_tooltip.bg->border;
 207         if (server.real_transparency) {
 208                 clear_pixmap(g_tooltip.window, 0, 0, width, height);
 209                 draw_rect(c, b.width, b.width, width-2*b.width, height-2*b.width, b.rounded-b.width/1.571);
 210                 cairo_set_source_rgba(c, bc.color[0], bc.color[1], bc.color[2], bc.alpha);
 211         }
 212         else {
 213                 cairo_rectangle(c, 0., 0, width, height);
 214                 cairo_set_source_rgb(c, bc.color[0], bc.color[1], bc.color[2]);
 215         }
 216         cairo_fill(c);
 217         cairo_set_line_width(c, b.width);
 218         if (server.real_transparency)
 219                 draw_rect(c, b.width/2.0, b.width/2.0, width - b.width, height - b.width, b.rounded);
 220         else
 221                 cairo_rectangle(c, b.width/2.0, b.width/2.0, width-b.width, height-b.width);
 222         cairo_set_source_rgba(c, b.color[0], b.color[1], b.color[2], b.alpha);
 223         cairo_stroke(c);
 224
 225         Color fc = g_tooltip.font_color;
 226         cairo_set_source_rgba(c, fc.color[0], fc.color[1], fc.color[2], fc.alpha);
 227         layout = pango_cairo_create_layout(c);
 228         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 229         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 230         PangoRectangle r1, r2;
 231         pango_layout_get_pixel_extents(layout, &r1, &r2);
 232         pango_layout_set_width(layout, width*PANGO_SCALE);
 233         pango_layout_set_height(layout, height*PANGO_SCALE);
 234         pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
 235         // 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.)
 236         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);
 237         pango_cairo_show_layout (c, layout);
 238
 239         g_object_unref (layout);
 240         cairo_destroy (c);
 241         cairo_surface_destroy (cs);
 242 }
 243
 244
 245 void tooltip_trigger_hide(Tooltip* tooltip)
 246 {
 247         if (g_tooltip.mapped) {
 248                 tooltip_copy_text(0);
 249                 start_hide_timeout();
 250         }
 251         else {
 252                 // tooltip not visible yet, but maybe a timeout is still pending
 253                 stop_tooltip_timeout();
 254         }
 255 }
 256
 257
 258 void tooltip_hide(void* arg)
 259 {
 260         stop_tooltip_timeout();
 261         if (g_tooltip.mapped) {
 262                 g_tooltip.mapped = False;
 263                 XUnmapWindow(server.dsp, g_tooltip.window);
 264                 XFlush(server.dsp);
 265         }
 266 }
 267
 268
 269 void start_show_timeout()
 270 {
 271         if (g_tooltip.timeout)
 272                 change_timeout(g_tooltip.timeout, g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 273         else
 274                 g_tooltip.timeout = add_timeout(g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 275 }
 276
 277
 278 void start_hide_timeout()
 279 {
 280         if (g_tooltip.timeout)
 281                 change_timeout(g_tooltip.timeout, g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 282         else
 283                 g_tooltip.timeout = add_timeout(g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 284 }
 285
 286
 287 void stop_tooltip_timeout()
 288 {
 289         if (g_tooltip.timeout) {
 290                 stop_timeout(g_tooltip.timeout);
 291                 g_tooltip.timeout = 0;
 292         }
 293 }
 294
 295
 296 void tooltip_copy_text(Area* area)
 297 {
 298         free(g_tooltip.tooltip_text);
 299         if (area && area->_get_tooltip_text)
 300                 g_tooltip.tooltip_text = strdup(area->_get_tooltip_text(area));
 301         else
 302                 g_tooltip.tooltip_text = 0;
 303         g_tooltip.area = area;
 304 }