*add* tooltips
git-svn-id: http://tint2.googlecode.com/svn/trunk@175 121b4492-b84c-0410-8b4c-0d4edfb3f3cc
This commit is contained in:
Andreas.Fink85
234
src/tooltip/tooltip.c
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234
src/tooltip/tooltip.c
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#include <stdio.h>
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#include <unistd.h>
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#include <cairo.h>
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#include <cairo-xlib.h>
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#include "server.h"
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#include "tooltip.h"
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#include "panel.h"
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// TODO: Use timer_create instead of setitimer, because SIGALRM is not the right signal for this...
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// Reason: If we want to implement autohide we have to use another signal...
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static int x, y, width, height;
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// give the tooltip some reasonable default values
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Tooltip g_tooltip = {
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.task = 0,
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.window = 0,
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.show_timeout = { .it_interval={0, 0}, .it_value={0, 0} },
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.hide_timeout = { .it_interval={0, 0}, .it_value={0, 0} },
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.enabled = False,
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.current_state = TOOLTIP_ABOUT_TO_HIDE,
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.mapped = False,
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.paddingx = 0,
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.paddingy = 0,
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.font_color = { .color={1, 1, 1}, .alpha=1 },
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.background_color = { .color={0.5, 0.4, 0.5}, .alpha=1 },
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.border = { .color={0, 0, 0}, .alpha=1, .width=1, .rounded=0 },
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.font_desc = 0
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};
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void init_tooltip()
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{
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if (!g_tooltip.font_desc)
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g_tooltip.font_desc = pango_font_description_from_string("sans 10");
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XSetWindowAttributes attr;
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attr.override_redirect = True;
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attr.event_mask = ExposureMask;
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if (g_tooltip.window) XDestroyWindow(server.dsp, g_tooltip.window);
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g_tooltip.window = XCreateWindow(server.dsp, server.root_win, 0, 0, 100, 20, 0, server.depth, InputOutput, CopyFromParent, CWOverrideRedirect|CWEventMask, &attr);
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}
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void tooltip_sighandler(int sig)
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{
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if (g_tooltip.current_state == TOOLTIP_ABOUT_TO_SHOW)
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tooltip_show();
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else if (g_tooltip.current_state == TOOLTIP_ABOUT_TO_HIDE)
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tooltip_hide();
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}
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void tooltip_trigger_show(Task* task, int x_root, int y_root)
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{
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x = x_root;
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y = y_root;
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if (g_tooltip.mapped && g_tooltip.task != task) {
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g_tooltip.task = task;
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tooltip_update();
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alarm(0);
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}
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else if (!g_tooltip.mapped) {
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g_tooltip.current_state = TOOLTIP_ABOUT_TO_SHOW;
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g_tooltip.task = task;
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struct timeval t = g_tooltip.show_timeout.it_value;
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if (t.tv_sec == 0 && t.tv_usec == 0)
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tooltip_show();
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else
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setitimer(ITIMER_REAL, &g_tooltip.show_timeout, 0);
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}
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}
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void tooltip_show()
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{
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if (!g_tooltip.mapped) {
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g_tooltip.mapped = True;
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XMapWindow(server.dsp, g_tooltip.window);
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tooltip_update();
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alarm(0);
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}
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}
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void tooltip_update_geometry()
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{
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cairo_surface_t *cs;
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cairo_t *c;
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PangoLayout* layout;
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cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
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c = cairo_create(cs);
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layout = pango_cairo_create_layout(c);
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pango_layout_set_font_description(layout, g_tooltip.font_desc);
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pango_layout_set_text(layout, g_tooltip.task->title, -1);
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PangoRectangle r1, r2;
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pango_layout_get_pixel_extents(layout, &r1, &r2);
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width = 2*g_tooltip.border.width + 2*g_tooltip.paddingx + r2.width;
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height = 2*g_tooltip.border.width + 2*g_tooltip.paddingy + r2.height;
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Panel* panel = g_tooltip.task->area.panel;
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if (panel_horizontal && panel_position & BOTTOM)
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y = panel->posy-height;
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else if (panel_horizontal && panel_position & TOP)
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y = panel->posy + panel->area.height;
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else if (panel_position & LEFT)
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x = panel->posx + panel->area.width;
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else
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x = panel->posx - width;
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g_object_unref(layout);
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cairo_destroy(c);
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cairo_surface_destroy(cs);
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}
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void tooltip_adjust_geometry()
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{
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// adjust coordinates and size to not go offscreen
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// it seems quite impossible that the height needs to be adjusted, but we do it anyway.
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int min_x, min_y, max_width, max_height;
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Panel* panel = g_tooltip.task->area.panel;
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int screen_width = server.monitor[panel->monitor].width;
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int screen_height = server.monitor[panel->monitor].height;
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if ( x+width <= screen_width && y+height <= screen_height && x>=0 && y>=0)
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return; // no adjustment needed
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if (panel_horizontal) {
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min_x=0;
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max_width=screen_width;
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max_height=screen_height-panel->area.height;
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if (panel_position & BOTTOM)
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min_y=0;
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else
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min_y=panel->area.height;
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}
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else {
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max_width=screen_width-panel->area.width;
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min_y=0;
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max_height=screen_height;
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if (panel_position & LEFT)
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min_x=panel->area.width;
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else
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min_x=0;
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}
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if (x+width > server.monitor[panel->monitor].width)
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x = server.monitor[panel->monitor].width-width;
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if ( y+height>server.monitor[panel->monitor].height)
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y = server.monitor[panel->monitor].height-height;
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if (x<min_x)
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x=min_x;
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if (width>max_width)
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width = max_width;
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if (y<min_y)
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y=min_y;
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if (height>max_height)
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height=max_height;
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}
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void tooltip_update()
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{
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if (!g_tooltip.task) {
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tooltip_hide();
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return;
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}
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tooltip_update_geometry();
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tooltip_adjust_geometry();
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XMoveResizeWindow(server.dsp, g_tooltip.window, x, y, width, height);
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// Stuff for drawing the tooltip
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cairo_surface_t *cs;
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cairo_t *c;
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PangoLayout* layout;
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cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
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c = cairo_create(cs);
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Color bc = g_tooltip.background_color;
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cairo_rectangle(c, 0, 0, width, height);
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cairo_set_source_rgb(c, bc.color[0], bc.color[1], bc.color[2]);
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cairo_fill(c);
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Border b = g_tooltip.border;
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cairo_set_source_rgba(c, b.color[0], b.color[1], b.color[2], b.alpha);
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cairo_set_line_width(c, b.width);
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cairo_rectangle(c, b.width/2.0, b.width/2.0, width-b.width, height-b.width);
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cairo_stroke(c);
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config_color fc = g_tooltip.font_color;
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cairo_set_source_rgba(c, fc.color[0], fc.color[1], fc.color[2], fc.alpha);
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layout = pango_cairo_create_layout(c);
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pango_layout_set_font_description(layout, g_tooltip.font_desc);
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pango_layout_set_text(layout, g_tooltip.task->title, -1);
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PangoRectangle r1, r2;
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pango_layout_get_pixel_extents(layout, &r1, &r2);
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pango_layout_set_width(layout, width*PANGO_SCALE);
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pango_layout_set_height(layout, height*PANGO_SCALE);
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pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
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// 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.)
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cairo_move_to(c, -r1.x/2+g_tooltip.border.width+g_tooltip.paddingx, -r1.y/2+g_tooltip.border.width+g_tooltip.paddingy);
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pango_cairo_show_layout (c, layout);
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g_object_unref (layout);
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cairo_destroy (c);
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cairo_surface_destroy (cs);
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}
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void tooltip_trigger_hide(Tooltip* tooltip)
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{
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if (g_tooltip.mapped) {
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g_tooltip.current_state = TOOLTIP_ABOUT_TO_HIDE;
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struct timeval t = g_tooltip.hide_timeout.it_value;
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if (t.tv_sec == 0 && t.tv_usec == 0)
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tooltip_hide();
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else
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setitimer(ITIMER_REAL, &g_tooltip.hide_timeout, 0);
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}
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else {
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// tooltip not visible yet, but maybe an alarm is still pending
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alarm(0);
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}
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}
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void tooltip_hide()
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{
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if (g_tooltip.mapped) {
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g_tooltip.mapped = False;
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XUnmapWindow(server.dsp, g_tooltip.window);
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}
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g_tooltip.task = 0;
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}
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