mirror of
https://github.com/alsa-project/alsa-utils
synced 2024-11-14 05:15:43 +01:00
139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/*
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* widget.c - handles widget objects and the widget stack
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* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "aconfig.h"
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#include <stdlib.h>
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#include <term.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include "die.h"
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#include "widget.h"
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int screen_lines;
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int screen_cols;
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static int cursor_visibility = -1;
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static void update_cursor_visibility(void)
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{
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const struct widget *active_widget;
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active_widget = get_active_widget();
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if (active_widget &&
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active_widget->cursor_visibility != cursor_visibility) {
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cursor_visibility = active_widget->cursor_visibility;
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curs_set(cursor_visibility);
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}
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}
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void widget_init(struct widget *widget, int lines_, int cols, int y, int x,
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chtype bkgd, unsigned int flags)
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{
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WINDOW *old_window;
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if (y == SCREEN_CENTER)
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y = (screen_lines - lines_) / 2;
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if (x == SCREEN_CENTER)
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x = (screen_cols - cols) / 2;
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old_window = widget->window;
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widget->window = newwin(lines_, cols, y, x);
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if (!widget->window)
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fatal_error("cannot create window");
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keypad(widget->window, TRUE);
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nodelay(widget->window, TRUE);
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leaveok(widget->window, !(flags & WIDGET_CURSOR_VISIBLE));
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wbkgdset(widget->window, bkgd);
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werase(widget->window);
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if (flags & WIDGET_BORDER)
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box(widget->window, 0, 0);
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if (flags & WIDGET_SUBWINDOW) {
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if (widget->subwindow)
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delwin(widget->subwindow);
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widget->subwindow = derwin(widget->window,
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lines_ - 2, cols - 2, 1, 1);
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if (!widget->subwindow)
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fatal_error("cannot create subwindow");
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wbkgdset(widget->subwindow, bkgd);
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}
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widget->cursor_visibility = !!(flags & WIDGET_CURSOR_VISIBLE);
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if (widget->panel) {
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replace_panel(widget->panel, widget->window);
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} else {
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widget->panel = new_panel(widget->window);
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if (!widget->panel)
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fatal_error("cannot create panel");
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set_panel_userptr(widget->panel, widget);
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}
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if (old_window)
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delwin(old_window);
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update_cursor_visibility();
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}
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void widget_free(struct widget *widget)
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{
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if (widget->panel) {
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del_panel(widget->panel);
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widget->panel = NULL;
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}
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if (widget->subwindow) {
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delwin(widget->subwindow);
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widget->subwindow = NULL;
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}
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if (widget->window) {
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delwin(widget->window);
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widget->window = NULL;
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}
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update_cursor_visibility();
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}
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const struct widget *get_active_widget(void)
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{
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PANEL *active_panel;
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active_panel = panel_below(NULL);
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if (active_panel)
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return panel_userptr(active_panel);
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else
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return NULL;
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}
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void window_size_changed(void)
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{
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PANEL *panel, *below;
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const struct widget *widget;
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struct winsize size;
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) == 0)
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resize_term(size.ws_row, size.ws_col);
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getmaxyx(stdscr, screen_lines, screen_cols);
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if (tigetflag("xenl") != 1 && tigetflag("am") != 1)
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--screen_lines;
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for (panel = panel_below(NULL); panel; panel = below) {
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below = panel_below(panel);
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widget = panel_userptr(panel);
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widget->window_size_changed();
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}
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}
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