src/tooltip/tooltip.c (raw)
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/************************************************************************** * * Copyright (C) 2009 Andreas.Fink (Andreas.Fink85@gmail.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. **************************************************************************/ #include <stdio.h> #include <unistd.h> #include <cairo.h> #include <cairo-xlib.h> #include "server.h" #include "tooltip.h" #include "panel.h" // TODO: Use timer_create instead of setitimer, because SIGALRM is not the right signal for this... // Reason: If we want to implement autohide we have to use another signal... static int x, y, width, height; // give the tooltip some reasonable default values Tooltip g_tooltip = { .task = 0, .window = 0, .show_timeout = { .it_interval={0, 0}, .it_value={0, 0} }, .hide_timeout = { .it_interval={0, 0}, .it_value={0, 0} }, .enabled = False, .current_state = TOOLTIP_ABOUT_TO_HIDE, .mapped = False, .paddingx = 0, .paddingy = 0, .font_color = { .color={1, 1, 1}, .alpha=1 }, .background_color = { .color={0.5, 0.4, 0.5}, .alpha=1 }, .border = { .color={0, 0, 0}, .alpha=1, .width=1, .rounded=0 }, .font_desc = 0 }; void init_tooltip() { if (!g_tooltip.font_desc) g_tooltip.font_desc = pango_font_description_from_string("sans 10"); XSetWindowAttributes attr; attr.override_redirect = True; attr.event_mask = ExposureMask; if (g_tooltip.window) XDestroyWindow(server.dsp, g_tooltip.window); g_tooltip.window = XCreateWindow(server.dsp, server.root_win, 0, 0, 100, 20, 0, server.depth, InputOutput, CopyFromParent, CWOverrideRedirect|CWEventMask, &attr); } void tooltip_sighandler(int sig) { if (g_tooltip.current_state == TOOLTIP_ABOUT_TO_SHOW) tooltip_show(); else if (g_tooltip.current_state == TOOLTIP_ABOUT_TO_HIDE) tooltip_hide(); } void tooltip_trigger_show(Task* task, int x_root, int y_root) { x = x_root; y = y_root; if (g_tooltip.mapped && g_tooltip.task != task) { g_tooltip.task = task; tooltip_update(); alarm(0); } else if (!g_tooltip.mapped) { g_tooltip.current_state = TOOLTIP_ABOUT_TO_SHOW; g_tooltip.task = task; struct timeval t = g_tooltip.show_timeout.it_value; if (t.tv_sec == 0 && t.tv_usec == 0) { alarm(0); tooltip_show(); } else setitimer(ITIMER_REAL, &g_tooltip.show_timeout, 0); } } void tooltip_show() { if (!g_tooltip.mapped) { g_tooltip.mapped = True; XMapWindow(server.dsp, g_tooltip.window); tooltip_update(); alarm(0); } } void tooltip_update_geometry() { cairo_surface_t *cs; cairo_t *c; PangoLayout* layout; cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height); c = cairo_create(cs); layout = pango_cairo_create_layout(c); pango_layout_set_font_description(layout, g_tooltip.font_desc); pango_layout_set_text(layout, g_tooltip.task->title, -1); PangoRectangle r1, r2; pango_layout_get_pixel_extents(layout, &r1, &r2); width = 2*g_tooltip.border.width + 2*g_tooltip.paddingx + r2.width; height = 2*g_tooltip.border.width + 2*g_tooltip.paddingy + r2.height; Panel* panel = g_tooltip.task->area.panel; if (panel_horizontal && panel_position & BOTTOM) y = panel->posy-height; else if (panel_horizontal && panel_position & TOP) y = panel->posy + panel->area.height; else if (panel_position & LEFT) x = panel->posx + panel->area.width; else x = panel->posx - width; g_object_unref(layout); cairo_destroy(c); cairo_surface_destroy(cs); } void tooltip_adjust_geometry() { // adjust coordinates and size to not go offscreen // it seems quite impossible that the height needs to be adjusted, but we do it anyway. int min_x, min_y, max_width, max_height; Panel* panel = g_tooltip.task->area.panel; int screen_width = server.monitor[panel->monitor].width; int screen_height = server.monitor[panel->monitor].height; if ( x+width <= screen_width && y+height <= screen_height && x>=0 && y>=0) return; // no adjustment needed if (panel_horizontal) { min_x=0; max_width=screen_width; max_height=screen_height-panel->area.height; if (panel_position & BOTTOM) min_y=0; else min_y=panel->area.height; } else { max_width=screen_width-panel->area.width; min_y=0; max_height=screen_height; if (panel_position & LEFT) min_x=panel->area.width; else min_x=0; } if (x+width > server.monitor[panel->monitor].width) x = server.monitor[panel->monitor].width-width; if ( y+height>server.monitor[panel->monitor].height) y = server.monitor[panel->monitor].height-height; if (x<min_x) x=min_x; if (width>max_width) width = max_width; if (y<min_y) y=min_y; if (height>max_height) height=max_height; } void tooltip_update() { if (!g_tooltip.task) { tooltip_hide(); return; } tooltip_update_geometry(); tooltip_adjust_geometry(); XMoveResizeWindow(server.dsp, g_tooltip.window, x, y, width, height); // Stuff for drawing the tooltip cairo_surface_t *cs; cairo_t *c; PangoLayout* layout; cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height); c = cairo_create(cs); Color bc = g_tooltip.background_color; cairo_rectangle(c, 0, 0, width, height); cairo_set_source_rgb(c, bc.color[0], bc.color[1], bc.color[2]); cairo_fill(c); Border b = g_tooltip.border; cairo_set_source_rgba(c, b.color[0], b.color[1], b.color[2], b.alpha); cairo_set_line_width(c, b.width); cairo_rectangle(c, b.width/2.0, b.width/2.0, width-b.width, height-b.width); cairo_stroke(c); config_color fc = g_tooltip.font_color; cairo_set_source_rgba(c, fc.color[0], fc.color[1], fc.color[2], fc.alpha); layout = pango_cairo_create_layout(c); pango_layout_set_font_description(layout, g_tooltip.font_desc); pango_layout_set_text(layout, g_tooltip.task->title, -1); PangoRectangle r1, r2; pango_layout_get_pixel_extents(layout, &r1, &r2); pango_layout_set_width(layout, width*PANGO_SCALE); pango_layout_set_height(layout, height*PANGO_SCALE); pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END); // 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.) cairo_move_to(c, -r1.x/2+g_tooltip.border.width+g_tooltip.paddingx, -r1.y/2+g_tooltip.border.width+g_tooltip.paddingy); pango_cairo_show_layout (c, layout); g_object_unref (layout); cairo_destroy (c); cairo_surface_destroy (cs); } void tooltip_trigger_hide(Tooltip* tooltip) { if (g_tooltip.mapped) { g_tooltip.current_state = TOOLTIP_ABOUT_TO_HIDE; struct timeval t = g_tooltip.hide_timeout.it_value; g_tooltip.task = 0; if (t.tv_sec == 0 && t.tv_usec == 0) { tooltip_hide(); alarm(0); } else setitimer(ITIMER_REAL, &g_tooltip.hide_timeout, 0); } else { // tooltip not visible yet, but maybe an alarm is still pending alarm(0); } } void tooltip_hide() { if (g_tooltip.mapped) { g_tooltip.mapped = False; XUnmapWindow(server.dsp, g_tooltip.window); } } |