mirror of
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309 lines
8.0 KiB
C
309 lines
8.0 KiB
C
/* gui_circular_process.c - GUI circular progress indicator component. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/gui.h>
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#include <grub/font.h>
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#include <grub/gui_string_util.h>
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#include <grub/gfxmenu_view.h>
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#include <grub/gfxwidgets.h>
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#include <grub/trig.h>
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struct grub_gui_circular_progress
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{
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struct grub_gui_progress progress;
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grub_gui_container_t parent;
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grub_video_rect_t bounds;
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char *id;
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int visible;
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int start;
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int end;
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int value;
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int num_ticks;
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int start_angle;
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int ticks_disappear;
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char *theme_dir;
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int need_to_load_pixmaps;
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char *center_file;
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char *tick_file;
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struct grub_video_bitmap *center_bitmap;
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struct grub_video_bitmap *tick_bitmap;
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};
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typedef struct grub_gui_circular_progress *circular_progress_t;
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static void
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circprog_destroy (void *vself)
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{
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circular_progress_t self = vself;
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grub_gfxmenu_timeout_unregister ((grub_gui_component_t) self);
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grub_free (self);
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}
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static const char *
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circprog_get_id (void *vself)
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{
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circular_progress_t self = vself;
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return self->id;
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}
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static int
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circprog_is_instance (void *vself __attribute__((unused)), const char *type)
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{
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return grub_strcmp (type, "component") == 0;
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}
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static struct grub_video_bitmap *
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load_bitmap (const char *dir, const char *file)
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{
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struct grub_video_bitmap *bitmap;
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char *abspath;
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/* Check arguments. */
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if (! dir || ! file)
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return 0;
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/* Resolve to an absolute path. */
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abspath = grub_resolve_relative_path (dir, file);
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if (! abspath)
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return 0;
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/* Load the image. */
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grub_errno = GRUB_ERR_NONE;
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grub_video_bitmap_load (&bitmap, abspath);
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grub_errno = GRUB_ERR_NONE;
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grub_free (abspath);
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return bitmap;
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}
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static int
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check_pixmaps (circular_progress_t self)
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{
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if (self->need_to_load_pixmaps)
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{
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if (self->center_bitmap)
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grub_video_bitmap_destroy (self->center_bitmap);
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self->center_bitmap = load_bitmap (self->theme_dir, self->center_file);
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self->tick_bitmap = load_bitmap (self->theme_dir, self->tick_file);
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self->need_to_load_pixmaps = 0;
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}
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return (self->center_bitmap != 0 && self->tick_bitmap != 0);
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}
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static void
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circprog_paint (void *vself, const grub_video_rect_t *region)
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{
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circular_progress_t self = vself;
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if (! self->visible)
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return;
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if (!grub_video_have_common_points (region, &self->bounds))
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return;
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if (! check_pixmaps (self))
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return;
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grub_video_rect_t vpsave;
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grub_gui_set_viewport (&self->bounds, &vpsave);
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int width = self->bounds.width;
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int height = self->bounds.height;
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int center_width = grub_video_bitmap_get_width (self->center_bitmap);
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int center_height = grub_video_bitmap_get_height (self->center_bitmap);
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int tick_width = grub_video_bitmap_get_width (self->tick_bitmap);
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int tick_height = grub_video_bitmap_get_height (self->tick_bitmap);
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grub_video_blit_bitmap (self->center_bitmap, GRUB_VIDEO_BLIT_BLEND,
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(width - center_width) / 2,
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(height - center_height) / 2, 0, 0,
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center_width, center_height);
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int radius = width / 2 - tick_width / 2 - 1;
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int nticks;
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int tick_begin;
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int tick_end;
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if (self->end == self->start)
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nticks = 0;
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else
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nticks = (self->num_ticks
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* (self->value - self->start)
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/ (self->end - self->start));
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/* Do ticks appear or disappear as the value approached the end? */
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if (self->ticks_disappear)
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{
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tick_begin = nticks;
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tick_end = self->num_ticks - 1;
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}
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else
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{
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tick_begin = 0;
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tick_end = nticks - 1;
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}
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int i;
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for (i = tick_begin; i < tick_end; i++)
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{
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int x;
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int y;
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int angle;
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/* Calculate the location of the tick. */
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angle = self->start_angle + i * GRUB_TRIG_ANGLE_MAX / self->num_ticks;
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x = width / 2 + (grub_cos (angle) * radius / GRUB_TRIG_FRACTION_SCALE);
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y = height / 2 + (grub_sin (angle) * radius / GRUB_TRIG_FRACTION_SCALE);
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/* Adjust (x,y) so the tick is centered. */
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x -= tick_width / 2;
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y -= tick_height / 2;
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/* Draw the tick. */
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grub_video_blit_bitmap (self->tick_bitmap, GRUB_VIDEO_BLIT_BLEND,
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x, y, 0, 0, tick_width, tick_height);
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}
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grub_gui_restore_viewport (&vpsave);
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}
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static void
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circprog_set_parent (void *vself, grub_gui_container_t parent)
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{
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circular_progress_t self = vself;
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self->parent = parent;
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}
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static grub_gui_container_t
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circprog_get_parent (void *vself)
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{
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circular_progress_t self = vself;
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return self->parent;
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}
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static void
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circprog_set_bounds (void *vself, const grub_video_rect_t *bounds)
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{
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circular_progress_t self = vself;
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self->bounds = *bounds;
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}
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static void
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circprog_get_bounds (void *vself, grub_video_rect_t *bounds)
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{
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circular_progress_t self = vself;
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*bounds = self->bounds;
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}
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static void
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circprog_set_state (void *vself, int visible, int start,
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int current, int end)
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{
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circular_progress_t self = vself;
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self->visible = visible;
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self->start = start;
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self->value = current;
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self->end = end;
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}
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static grub_err_t
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circprog_set_property (void *vself, const char *name, const char *value)
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{
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circular_progress_t self = vself;
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if (grub_strcmp (name, "num_ticks") == 0)
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{
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self->num_ticks = grub_strtol (value, 0, 10);
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}
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else if (grub_strcmp (name, "start_angle") == 0)
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{
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self->start_angle = grub_strtol (value, 0, 10);
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}
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else if (grub_strcmp (name, "ticks_disappear") == 0)
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{
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self->ticks_disappear = grub_strcmp (value, "false") != 0;
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}
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else if (grub_strcmp (name, "center_bitmap") == 0)
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{
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self->need_to_load_pixmaps = 1;
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grub_free (self->center_file);
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self->center_file = value ? grub_strdup (value) : 0;
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}
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else if (grub_strcmp (name, "tick_bitmap") == 0)
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{
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self->need_to_load_pixmaps = 1;
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grub_free (self->tick_file);
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self->tick_file = value ? grub_strdup (value) : 0;
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}
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else if (grub_strcmp (name, "theme_dir") == 0)
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{
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self->need_to_load_pixmaps = 1;
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grub_free (self->theme_dir);
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self->theme_dir = value ? grub_strdup (value) : 0;
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}
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else if (grub_strcmp (name, "id") == 0)
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{
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grub_gfxmenu_timeout_unregister ((grub_gui_component_t) self);
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grub_free (self->id);
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if (value)
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self->id = grub_strdup (value);
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else
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self->id = 0;
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if (self->id && grub_strcmp (self->id, GRUB_GFXMENU_TIMEOUT_COMPONENT_ID)
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== 0)
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grub_gfxmenu_timeout_register ((grub_gui_component_t) self,
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circprog_set_state);
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}
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return grub_errno;
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}
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static struct grub_gui_component_ops circprog_ops =
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{
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.destroy = circprog_destroy,
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.get_id = circprog_get_id,
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.is_instance = circprog_is_instance,
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.paint = circprog_paint,
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.set_parent = circprog_set_parent,
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.get_parent = circprog_get_parent,
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.set_bounds = circprog_set_bounds,
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.get_bounds = circprog_get_bounds,
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.set_property = circprog_set_property
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};
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static struct grub_gui_progress_ops circprog_prog_ops =
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{
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.set_state = circprog_set_state
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};
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grub_gui_component_t
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grub_gui_circular_progress_new (void)
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{
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circular_progress_t self;
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self = grub_zalloc (sizeof (*self));
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if (! self)
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return 0;
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self->progress.ops = &circprog_prog_ops;
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self->progress.component.ops = &circprog_ops;
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self->visible = 1;
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self->num_ticks = 64;
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self->start_angle = -64;
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return (grub_gui_component_t) self;
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}
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