mirror of
https://github.com/alsa-project/alsa-utils
synced 2024-09-19 17:49:59 +02:00
ba1c5357a1
Mouse support has been added for mixer_widget.c, card_select.c and proc_files.c. In the mixer widget the mouse is handled as follows: - After an element has been printed in mixer_display.c, a call to clickable_set() will store the coordinates of the drawn area plus the command enum that should be executed on click. An optional argument holds an index which points to the selected mixer control. - on_mouse_click() searches for a matching rectangle, focuses the mixer control and returns the command enum. In the menu widgets, the menu_driver() function handles mouse input. Signed-off-by: Benjamin Abendroth <braph93@gmx.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include "mixer_clickable.h"
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extern int screen_cols;
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extern int screen_lines;
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static struct clickable_rect *clickable_rects = NULL;
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static unsigned int clickable_rects_count = 0;
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static unsigned int last_rect = 0;
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/* Using 0 instead of -1 for marking free rectangles allows us to use
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* memset for `freeing` all rectangles at once.
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* Zero is actually a valid coordinate in ncurses, but since we don't have
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* any clickables in the top line this is fine. */
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#define FREE_MARKER 0
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#define RECT_IS_FREE(RECT) ((RECT).y1 == FREE_MARKER)
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#define RECT_FREE(RECT) ((RECT).y1 = FREE_MARKER)
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void clickable_set(int y1, int x1, int y2, int x2, command_enum command, int arg1) {
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struct clickable_rect* tmp;
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unsigned int i;
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for (i = last_rect; i < clickable_rects_count; ++i) {
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if (RECT_IS_FREE(clickable_rects[i])) {
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last_rect = i;
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goto SET_CLICKABLE_DATA;
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}
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}
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for (i = 0; i < last_rect; ++i) {
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if (RECT_IS_FREE(clickable_rects[i])) {
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last_rect = i;
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goto SET_CLICKABLE_DATA;
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}
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}
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last_rect = clickable_rects_count;
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tmp = realloc(clickable_rects, (clickable_rects_count + 8) * sizeof(*clickable_rects));
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if (!tmp) {
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free(clickable_rects);
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clickable_rects = NULL;
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clickable_rects_count = 0;
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last_rect = 0;
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return;
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}
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clickable_rects = tmp;
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#if FREE_MARKER == 0
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memset(clickable_rects + clickable_rects_count, 0, 8 * sizeof(*clickable_rects));
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#else
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for (i = clickable_rects_count; i < clickable_rects_count + 8; ++i)
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RECT_FREE(clickable_rects[i]);
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#endif
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clickable_rects_count += 8;
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SET_CLICKABLE_DATA:
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clickable_rects[last_rect] = (struct clickable_rect) {
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.y1 = y1,
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.x1 = x1,
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.x2 = x2,
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.y2 = y2,
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.command = command,
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.arg1 = arg1
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};
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}
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void clickable_set_relative(WINDOW *win, int y1, int x1, int y2, int x2, command_enum command, int arg1) {
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int y, x;
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getyx(win, y, x);
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y1 = y + y1;
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x1 = x + x1;
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y2 = y + y2;
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x2 = x + x2;
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clickable_set(y1, x1, y2, x2, command, arg1);
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}
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void clickable_clear(int y1, int x1, int y2, int x2) {
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#define IS_IN_RECT(Y, X) (Y >= y1 && Y <= y2 && X >= x1 && X <= x2)
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unsigned int i;
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if (x1 == 0 && x2 == -1 && y2 == -1) {
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if (y1 == 0) {
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// Optimize case: clear all
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#if FREE_MARKER == 0
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if (clickable_rects)
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memset(clickable_rects, 0,
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clickable_rects_count * sizeof(*clickable_rects));
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#else
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for (i = 0; i < clickable_rects_count; ++i)
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RECT_FREE(clickable_rects[i]);
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#endif
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}
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else {
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// Optimize case: clear all lines beyond y1
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for (i = 0; i < clickable_rects_count; ++i) {
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if (clickable_rects[i].y2 >= y1)
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RECT_FREE(clickable_rects[i]);
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}
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}
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return;
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}
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if (y2 < 0)
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y2 = screen_lines + y2 + 1;
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if (x2 < 0)
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x2 = screen_cols + x2 + 1;
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for (i = 0; i < clickable_rects_count; ++i) {
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if (!RECT_IS_FREE(clickable_rects[i]) && (
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IS_IN_RECT(clickable_rects[i].y1, clickable_rects[i].x1) ||
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IS_IN_RECT(clickable_rects[i].y2, clickable_rects[i].x2)
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))
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{
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RECT_FREE(clickable_rects[i]);
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}
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}
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}
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struct clickable_rect* clickable_find(int y, int x) {
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unsigned int i;
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for (i = 0; i < clickable_rects_count; ++i) {
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if (
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!RECT_IS_FREE(clickable_rects[i]) &&
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y >= clickable_rects[i].y1 &&
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x >= clickable_rects[i].x1 &&
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y <= clickable_rects[i].y2 &&
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x <= clickable_rects[i].x2
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)
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{
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return &clickable_rects[i];
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}
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}
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return NULL;
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}
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