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_original, y_original, 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 = x_original = area->posx + area->width / 2 + e->xmotion.x_root - e->xmotion.x;
  82         y = y_original = area->posy + area->height / 2 + e->xmotion.y_root - e->xmotion.y;
  83         g_tooltip.panel = p;
  84         if (g_tooltip.mapped && g_tooltip.area != area) {
  85                 tooltip_copy_text(area);
  86                 tooltip_update();
  87                 stop_tooltip_timeout();
  88         }
  89         else if (!g_tooltip.mapped) {
  90                 start_show_timeout();
  91         }
  92 }
  93
  94
  95 void tooltip_show(void* arg)
  96 {
  97         int mx, my;
  98         Window w;
  99         XTranslateCoordinates( server.dsp, server.root_win, g_tooltip.panel->main_win, x, y, &mx, &my, &w);
 100         Area* area = click_area(g_tooltip.panel, mx, my);
 101         stop_tooltip_timeout();
 102         if (!g_tooltip.mapped && area->_get_tooltip_text) {
 103                 tooltip_copy_text(area);
 104                 g_tooltip.mapped = True;
 105                 XMapWindow(server.dsp, g_tooltip.window);
 106                 tooltip_update();
 107                 XFlush(server.dsp);
 108         }
 109 }
 110
 111
 112 void tooltip_update_geometry()
 113 {
 114         cairo_surface_t *cs;
 115         cairo_t *c;
 116         PangoLayout* layout;
 117         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 118         c = cairo_create(cs);
 119         layout = pango_cairo_create_layout(c);
 120         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 121         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 122         PangoRectangle r1, r2;
 123         pango_layout_get_pixel_extents(layout, &r1, &r2);
 124         width = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingx + r2.width;
 125         height = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingy + r2.height;
 126
 127         x = x_original;
 128         y = y_original;
 129
 130         Panel* panel = g_tooltip.panel;
 131         if (panel_horizontal && panel_position & BOTTOM)
 132                 y = panel->posy-height;
 133         else if (panel_horizontal && panel_position & TOP)
 134                 y = panel->posy + panel->area.height;
 135         else if (panel_position & LEFT)
 136                 x = panel->posx + panel->area.width;
 137         else
 138                 x = panel->posx - width;
 139
 140         if (!panel_horizontal)
 141                 y -= height/2;
 142
 143         g_object_unref(layout);
 144         cairo_destroy(c);
 145         cairo_surface_destroy(cs);
 146 }
 147
 148
 149 void tooltip_adjust_geometry()
 150 {
 151         // adjust coordinates and size to not go offscreen
 152         // it seems quite impossible that the height needs to be adjusted, but we do it anyway.
 153
 154         int min_x, min_y, max_width, max_height;
 155         Panel* panel = g_tooltip.panel;
 156         int screen_width = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width;
 157         int screen_height = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height;
 158         if ( x+width <= screen_width && y+height <= screen_height && x>=0 && y>=0)
 159                 return;    // no adjustment needed
 160
 161         if (panel_horizontal) {
 162                 min_x=0;
 163                 max_width=screen_width;
 164                 max_height=screen_height-panel->area.height;
 165                 if (panel_position & BOTTOM)
 166                         min_y=0;
 167                 else
 168                         min_y=panel->area.height;
 169         }
 170         else {
 171                 max_width=screen_width-panel->area.width;
 172                 min_y=0;
 173                 max_height=screen_height;
 174                 if (panel_position & LEFT)
 175                         min_x=panel->area.width;
 176                 else
 177                         min_x=0;
 178         }
 179
 180         if (x+width > server.monitor[panel->monitor].x + server.monitor[panel->monitor].width)
 181                 x = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width - width;
 182         if ( y+height > server.monitor[panel->monitor].y + server.monitor[panel->monitor].height)
 183                 y = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height - height;
 184
 185         if (x<min_x)
 186                 x=min_x;
 187         if (width>max_width)
 188                 width = max_width;
 189         if (y<min_y)
 190                 y=min_y;
 191         if (height>max_height)
 192                 height=max_height;
 193 }
 194
 195 void tooltip_update()
 196 {
 197         if (!g_tooltip.tooltip_text) {
 198                 tooltip_hide(0);
 199                 return;
 200         }
 201
 202         tooltip_update_geometry();
 203         tooltip_adjust_geometry();
 204         XMoveResizeWindow(server.dsp, g_tooltip.window, x, y, width, height);
 205
 206         // Stuff for drawing the tooltip
 207         cairo_surface_t *cs;
 208         cairo_t *c;
 209         PangoLayout* layout;
 210         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 211         c = cairo_create(cs);
 212         Color bc = g_tooltip.bg->back;
 213         Border b = g_tooltip.bg->border;
 214         if (server.real_transparency) {
 215                 clear_pixmap(g_tooltip.window, 0, 0, width, height);
 216                 draw_rect(c, b.width, b.width, width-2*b.width, height-2*b.width, b.rounded-b.width/1.571);
 217                 cairo_set_source_rgba(c, bc.color[0], bc.color[1], bc.color[2], bc.alpha);
 218         }
 219         else {
 220                 cairo_rectangle(c, 0., 0, width, height);
 221                 cairo_set_source_rgb(c, bc.color[0], bc.color[1], bc.color[2]);
 222         }
 223         cairo_fill(c);
 224         cairo_set_line_width(c, b.width);
 225         if (server.real_transparency)
 226                 draw_rect(c, b.width/2.0, b.width/2.0, width - b.width, height - b.width, b.rounded);
 227         else
 228                 cairo_rectangle(c, b.width/2.0, b.width/2.0, width-b.width, height-b.width);
 229         cairo_set_source_rgba(c, b.color[0], b.color[1], b.color[2], b.alpha);
 230         cairo_stroke(c);
 231
 232         Color fc = g_tooltip.font_color;
 233         cairo_set_source_rgba(c, fc.color[0], fc.color[1], fc.color[2], fc.alpha);
 234         layout = pango_cairo_create_layout(c);
 235         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 236         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 237         PangoRectangle r1, r2;
 238         pango_layout_get_pixel_extents(layout, &r1, &r2);
 239         pango_layout_set_width(layout, width*PANGO_SCALE);
 240         pango_layout_set_height(layout, height*PANGO_SCALE);
 241         pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
 242         // 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.)
 243         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);
 244         pango_cairo_show_layout (c, layout);
 245
 246         g_object_unref (layout);
 247         cairo_destroy (c);
 248         cairo_surface_destroy (cs);
 249 }
 250
 251
 252 void tooltip_trigger_hide(Tooltip* tooltip)
 253 {
 254         if (g_tooltip.mapped) {
 255                 tooltip_copy_text(0);
 256                 start_hide_timeout();
 257         }
 258         else {
 259                 // tooltip not visible yet, but maybe a timeout is still pending
 260                 stop_tooltip_timeout();
 261         }
 262 }
 263
 264
 265 void tooltip_hide(void* arg)
 266 {
 267         stop_tooltip_timeout();
 268         if (g_tooltip.mapped) {
 269                 g_tooltip.mapped = False;
 270                 XUnmapWindow(server.dsp, g_tooltip.window);
 271                 XFlush(server.dsp);
 272         }
 273 }
 274
 275
 276 void start_show_timeout()
 277 {
 278         if (g_tooltip.timeout)
 279                 change_timeout(g_tooltip.timeout, g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 280         else
 281                 g_tooltip.timeout = add_timeout(g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 282 }
 283
 284
 285 void start_hide_timeout()
 286 {
 287         if (g_tooltip.timeout)
 288                 change_timeout(g_tooltip.timeout, g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 289         else
 290                 g_tooltip.timeout = add_timeout(g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 291 }
 292
 293
 294 void stop_tooltip_timeout()
 295 {
 296         if (g_tooltip.timeout) {
 297                 stop_timeout(g_tooltip.timeout);
 298                 g_tooltip.timeout = 0;
 299         }
 300 }
 301
 302
 303 void tooltip_copy_text(Area* area)
 304 {
 305         free(g_tooltip.tooltip_text);
 306         if (area && area->_get_tooltip_text)
 307                 g_tooltip.tooltip_text = strdup(area->_get_tooltip_text(area));
 308         else
 309                 g_tooltip.tooltip_text = 0;
 310         g_tooltip.area = area;
 311 }